BioMed Research International: Oncology http://www.hindawi.com The latest articles from Hindawi Publishing Corporation © 2014 , Hindawi Publishing Corporation . All rights reserved. Hyperglycemia, a Neglected Factor during Cancer Progression Thu, 17 Apr 2014 07:50:39 +0000 http://www.hindawi.com/journals/bmri/2014/461917/ Recent evidence from large cohort studies suggests that there exists a higher cancer incidence in people with type 2 diabetes (DM2). However, to date, the potential reasons for this association remain unclear. Hyperglycemia, the most important feature of diabetes, may be responsible for the excess glucose supply for these glucose-hungry cells, and it contributes to apoptosis resistance, oncogenesis, and tumor cell resistance to chemotherapy. Considering associations between diabetes and malignancies, the effect of hyperglycemia on cancer progression in cancer patients with abnormal blood glucose should not be neglected. In this paper, we describe the role that hyperglycemia plays in cancer progression and treatment and illustrate that hyperglycemia may contribute to a more malignant phenotype of cancer cells and lead to drug resistance. Therefore, controlling hyperglycemia may have important therapeutic implications in cancer patients. Wanxing Duan, Xin Shen, Jianjun Lei, Qinhong Xu, Yongtian Yu, Rong Li, Erxi Wu, and Qingyong Ma Copyright © 2014 Wanxing Duan et al. All rights reserved. The Molecular Mechanisms of Tanshinone IIA on the Apoptosis and Arrest of Human Esophageal Carcinoma Cells Tue, 15 Apr 2014 13:14:36 +0000 http://www.hindawi.com/journals/bmri/2014/582730/ Objective. To explore the possible mechanisms of Tanshinone IIA (TanIIA) on esophageal carcinoma cell lines. Methods. Two human esophageal carcinoma cell lines (EC-1 cells and ECa-109 cells) were treated with different concentrations of TanIIA. Cell proliferation was measured by CCK-8, colony-forming efficiency was calculated, cell cycle and apoptosis were measured, and changes in cell cycle- and apoptosis-related gene expression were measured by Western blotting. Results. The CCK-8 and colony formation assay indicated that TanIIA inhibited the cell proliferation of human esophageal cancer cells (IC50 below 1 μg/mL) at 48 h. Hoechst 33258 and flow cytometry showed that TanIIA induced apoptosis in both esophageal cancer cell lines. Flow cytometry showed that TanIIA arrested cell cycle in S phase and G2/M phase. Western blotting analysis showed that Akt1 and its phosphorylation were inhibited, the Bax/Bcl-2 ratio increased, and both caspase-9 and caspase-3 were activated after treatment with 1.3 μg/mL TanIIA at 48 h. Meanwhile, p53 and p21 protein levels increased, whereas cyclin B1, CDC2, and CDC2 phosphorylation were inhibited. Conclusion. TanIIA inhibits the growth of esophageal cancer cells and induces apoptosis in a time-dependent and concentration-dependent manner, possibly by affecting cell cycle- and apoptosis-related signaling pathways. Jiang-Feng Wang, Jian-Guo Feng, Jing Han, Bei-Bei Zhang, and Wei-Min Mao Copyright © 2014 Jiang-Feng Wang et al. All rights reserved. Differential Expression of Long Noncoding RNA in Primary and Recurrent Nasopharyngeal Carcinoma Mon, 14 Apr 2014 17:26:29 +0000 http://www.hindawi.com/journals/bmri/2014/404567/ Background. Recent studies suggested that non-protein-coding genes are implicated in the tumorigenic process of nasopharyngeal carcinoma (NPC). In the present study, we aimed to identify the differentially expressed long noncoding RNA (lncRNA) using data available in the public domain. Methods. Microarray data set GSE12452 was reannotated with ncFANs. Real-time quantitative PCR was used to quantify and validate the identified lncRNAs in NPC. Results. In primary NPC, upregulation of lnc-C22orf32-1, lnc-AL355149.1-1, and lnc-ZNF674-1 was observed. High levels of lnc-C22orf32-1 and lnc-AL355149.1-1 were significantly associated with the male patients. In addition, increased expression of lnc-C22orf32-1 and lnc-ZNF674-1 was associated with advanced tumor stages. Recurrent NPC displayed a distinctive lncRNA expression pattern. lnc-BCL2L11-3 was significantly increased in the recurrent NPC tissues. In addition, significant reduction of lnc-AL355149.1-1 and lnc-ZNF674-1 was observed in the recurrent NPC tissues. Conclusions. Our results demonstrated that it is feasible to identify the differentially expressed lncRNA in the microarray dataset by functional reannotation. The association of lncRNA with gender and tumor size implicated that lncRNA possibly plays a part in the pathogenesis of primary NPC. Further, the distinctive lncRNA identified in the recurrent NPC may reveal a distinctive development mechanism underlying tumor recurrence. Wei Gao, Jimmy Yu-Wai Chan, and Thian-Sze Wong Copyright © 2014 Wei Gao et al. All rights reserved. Extracts from Glioma Tissues following Cryoablation Have Proapoptosis, Antiproliferation, and Anti-Invasion Effects on Glioma Cells Thu, 10 Apr 2014 09:37:39 +0000 http://www.hindawi.com/journals/bmri/2014/236939/ Objective. This study is to investigate the in vivo apoptotic processes in glioma tissues following cryoablation and the effects of glioma tissue extracts on GL261 glioma cells in vitro. Methods. TUNEL and flow cytometry analysis were performed to detect the apoptotic processes in the glioma tissues following cryoablation and in the GL261 cells treated with cryoablated tumor extracts. The scratch assay, the transwell assay, and Western blot analysis were carried out to evaluate the effects of cryoablated tumor extracts on the migration, invasion, and proliferation of tumor cells. Results. Our in vivo results indicated that the rapid-onset apoptosis was induced via the intrinsic pathway and the delayed apoptosis was triggered through the extrinsic pathway. The in vitro results showed that extracts from glioma tissues following cryoablation induced apoptosis via extrinsic pathways in GL261 glioma cells. Furthermore, cryoablated tumor extracts significantly inhibited the migration and proliferation of these cells, which would be related to the inhibition of ERK1/2 pathway and the activation of P38 pathway. Conclusion. Glioma cells surviving in cryoablation undergo intrinsic or extrinsic apoptosis. Augmenting the induction of apoptosis or enhancing the cryosensitization of tumor cells by coupling cryoablation with specific chemotherapy effectively increases the efficiency of this therapeutic treatment. Tianzhu Liu, Xin Wang, Zhilin Yin, Jun Pan, Hongbo Guo, and Shizhong Zhang Copyright © 2014 Tianzhu Liu et al. All rights reserved. Early Preinvasive Lesions in Ovarian Cancer Tue, 08 Apr 2014 08:58:00 +0000 http://www.hindawi.com/journals/bmri/2014/639252/ Faced with the catastrophic prognosis for ovarian cancer due to the fact that it is most often diagnosed late at the peritoneal carcinomatosis stage, screening and early detection could probably reduce the mortality rate. A better understanding of the molecular characteristics of the different ovarian cancer subtypes and their specific molecular signatures is indispensable prior to development of new screening strategies. We discuss here the early natural history of ovarian cancer and its origins. Gautier Chene, Gery Lamblin, Karine Le Bail-Carval, Philippe Chabert, Naoual Bakrin, and Georges Mellier Copyright © 2014 Gautier Chene et al. All rights reserved. Dose Distributions of an 192Ir Brachytherapy Source in Different Media Mon, 07 Apr 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/946213/ This study used MCNPX code to investigate the brachytherapy 192Ir dose distributions in water, bone, and lung tissue and performed radiophotoluminescent glass dosimeter measurements to verify the obtained MCNPX results. The results showed that the dose-rate constant, radial dose function, and anisotropy function in water were highly consistent with data in the literature. However, the lung dose near the source would be overestimated by up to 12%, if the lung tissue is assumed to be water, and, hence, if a tumor is located in the lung, the tumor dose will be overestimated, if the material density is not taken into consideration. In contrast, the lung dose far from the source would be underestimated by up to 30%. Radial dose functions were found to depend not only on the phantom size but also on the material density. The phantom size affects the radial dose function in bone more than those in the other tissues. On the other hand, the anisotropy function in lung tissue was not dependent on the radial distance. Our simulation results could represent valid clinical reference data and be used to improve the accuracy of the doses delivered during brachytherapy applied to patients with lung cancer. C. H. Wu, Y. J. Liao, Y. W. Hsueh Liu, S. K. Hung, M. S. Lee, and S. M. Hsu Copyright © 2014 C. H. Wu et al. All rights reserved. Silencing miR-21 Sensitizes Non-Small Cell Lung Cancer A549 Cells to Ionizing Radiation through Inhibition of PI3K/Akt Mon, 07 Apr 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/617868/ We investigated the role of microRNA-21 (miR-21) in radiotherapy resistance of non-small cell lung cancers (NSCLC) and the underlying molecular mechanism. A549 cells were transfected with anti-miR-21 or the negative control oligonucleotides and real-time PCR was applied to detect miR-21 expression level. After ionizing radiation (IR), the survival fractions, proliferation, apoptosis, and expression of phosphorylated-Akt of A549 cells were determined by clonogenic survival analysis, MTT assay, flow cytometry, and Western blotting. Downregulation of miR-21 in radioresistant NSCLC A549 cells inhibited the colony-forming ability and proliferation of A549 cells after IR. Moreover, silencing miR-21 enhanced apoptosis of A549 cells induced by IR accompanied by decreased phosphorylated-Akt protein level. However, PI3K activator IGF-1 reversed suppression of phosphorylated-Akt protein level and promotion of apoptosis of A549 cells after IR caused by miR-21 knockdown. Silencing miR-21 in radioresistant NSCLC A549 cells sensitized them to IR by inhibiting cell proliferation and enhancing cell apoptosis through inhibition of PI3K/Akt signaling pathway. This might help in sensitization of NSCLC to radiotherapy. Yongfu Ma, Hui Xia, Yang Liu, and Min Li Copyright © 2014 Yongfu Ma et al. All rights reserved. Cancer Diagnostic and Predictive Biomarkers Thu, 03 Apr 2014 11:39:11 +0000 http://www.hindawi.com/journals/bmri/2014/980163/ Franco M. Buonaguro, David Pauza, Maria Lina Tornesello, Pierre Hainaut, Renato Franco, and Francesco M. Marincola Copyright © 2014 Franco M. Buonaguro et al. All rights reserved. Extracellular Matrix Proteins Expression Profiling in Chemoresistant Variants of the A2780 Ovarian Cancer Cell Line Thu, 03 Apr 2014 11:30:03 +0000 http://www.hindawi.com/journals/bmri/2014/365867/ Ovarian cancer is the leading cause of death among gynaecological malignancies. Extracellular matrix (ECM) can affect drug resistance by preventing the penetration of the drug into cancer cells and increased resistance to apoptosis. This study demonstrates alterations in the expression levels of ECM components and related genes in cisplatin-, doxorubicin-, topotecan-, and paclitaxel-resistant variants of the A2780 ovarian cancer cell line. Affymetrix Gene Chip Human Genome Array Strips were used for hybridisations. The genes that had altered expression levels in drug-resistant sublines were selected and filtered by scatter plots. The genes that were up- or downregulated more than fivefold were selected and listed. Among the investigated genes, 28 genes were upregulated, 10 genes were downregulated, and two genes were down- or upregulated depending on the cell line. Between upregulated genes 12 were upregulated very significantly—over 20-fold. These genes included COL1A2, COL12A1, COL21A1, LOX, TGFBI, LAMB1, EFEMP1, GPC3, SDC2, MGP, MMP3, and TIMP3. Four genes were very significantly downregulated: COL11A1, LAMA2, GPC6, and LUM. The expression profiles of investigated genes provide a preliminary insight into the relationship between drug resistance and the expression of ECM components. Identifying correlations between investigated genes and drug resistance will require further analysis. Radosław Januchowski, Piotr Zawierucha, Marcin Ruciński, Michał Nowicki, and Maciej Zabel Copyright © 2014 Radosław Januchowski et al. All rights reserved. Cancer Monitoring Methods Thu, 03 Apr 2014 07:06:09 +0000 http://www.hindawi.com/journals/bmri/2014/981495/ Aleksandra Nikolic, Oronza Antonietta Botrugno, Jelena Urosevic, and Natasa Tosic Copyright © 2014 Aleksandra Nikolic et al. All rights reserved. Diagnostic Value of Virtual Touch Tissue Quantification for Breast Lesions with Different Size Wed, 02 Apr 2014 13:37:47 +0000 http://www.hindawi.com/journals/bmri/2014/142504/ Purpose. To evaluate diagnostic value of the virtual touch tissue quantification (VTTQ) for breast lesions with different sizes. Materials and Methods. Patients with 206 breast lesions were categorized into three groups according to lesion size (<10 mm, 10–20 mm, and >20 mm). Breast lesions were examined by conventional ultrasound and VTTQ, and shear wave velocity (SWV) of each lesion and adjacent normal breast tissue were measured. Diagnoses were confirmed by pathological examination after surgery. The receiver-operating characteristic curve (ROC) analyses were performed to evaluate the diagnostic value of SWV, and the area under curves (AUC) was compared among groups. Results. SWV of malignant lesions was much higher than that of benign lesions, whereas the difference was not obvious for lesions <10 mm (). There was statistical significant difference of AUC between lesions <10 mm and 10–20 mm (), as well as lesions <10 mm and >20 mm (). The sensitivity of lesions <10 mm was 33.33%, which was relatively low compared to other groups. Conclusion. According to our results, VTTQ is a promising method for breast lesions >10 mm, and further studies were warranted to improve sensitivity of VTTQ for breast lesions <10 mm. Minghua Yao, Jian Wu, Liling Zou, Guang Xu, Juan Xie, Rong Wu, and Huixiong Xu Copyright © 2014 Minghua Yao et al. All rights reserved. Evaluation of Virtual Touch Tissue Imaging Quantification, a New Shear Wave Velocity Imaging Method, for Breast Lesion Assessment by Ultrasound Mon, 31 Mar 2014 12:13:32 +0000 http://www.hindawi.com/journals/bmri/2014/960262/ Objectives. To evaluate virtual touch tissue imaging quantification (VTIQ) as a new elastography method concerning its intra- and interexaminer reliability and its ability to differentiate benign from malignant breast lesions in comparison to and in combination with ultrasound (US) B-mode breast imaging reporting and data system (BI-RADS) assessment. Materials and Methods. US and VTIQ were performed by two examiners in 103 women with 104 lesions. Intra- and interexaminer reliability of VTIQ was assessed. The area under the receiver operating curve (AUC), sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of BIRADS, VTIQ, and combined data were compared. Results. Fifty-four of 104 lesions were malignant. Intraexaminer reliability was consistent, and interexaminer agreement showed a strong positive correlation (). The mean VTIQ values in malignant lesions were significantly higher than those in benign (7.73 m/s ± 1.02 versus 4.46 m/s ± 1.87; ). The combination of US-BIRADS with the optimal cut-off for clinical decision making of 5.18 m/s yielded a sensitivity of 98%, specificity of 82%, PPV of 86%, and NPV of 98%. The combination of BIRADS and VTIQ led to improved test validity. Conclusion. VTIQ is highly reliable and reproducible. There is a significant difference regarding the mean maximum velocity of benign and malignant lesions. Adding VTIQ to BIRADS assessment improves the specificity. Michael Golatta, Mirjam Schweitzer-Martin, Aba Harcos, Sarah Schott, Christina Gomez, Anne Stieber, Geraldine Rauch, Christoph Domschke, Joachim Rom, Florian Schütz, Christof Sohn, and Jörg Heil Copyright © 2014 Michael Golatta et al. All rights reserved. Cytokines, Fatigue, and Cutaneous Erythema in Early Stage Breast Cancer Patients Receiving Adjuvant Radiation Therapy Mon, 31 Mar 2014 08:08:14 +0000 http://www.hindawi.com/journals/bmri/2014/523568/ We investigated the hypothesis that patients developing high-grade erythema of the breast skin during radiation treatment could be more likely to present increased levels of proinflammatory cytokines which may lead, in turn, to associated fatigue. Forty women with early stage breast cancer who received adjuvant radiotherapy were enrolled from 2007 to 2010. Fatigue symptoms, erythema, and cytokine levels (IL-1β, IL-2, IL6, IL-8, TNF-α, and MCP-1) were registered at baseline, during treatment, and after radiotherapy completion. Seven (17.5%) patients presented fatigue without associated depression/anxiety. Grade ≥2 erythema was observed in 5 of these 7 patients. IL-1β, IL-2, IL-6, and TNF-α were statistically increased 4 weeks after radiotherapy (). After the Heckman two-step analysis, a statistically significant influence of skin erythema on proinflammatory markers increase (P = 0.00001) was recorded; in the second step, these blood markers showed a significant impact on fatigue (P = 0.026). A seeming increase of fatigue, erythema, and proinflammatory markers was observed between the fourth and the fifth week of treatment followed by a decrease after RT. There were no significant effects of hormone therapy, breast volume, and anemia on fatigue. Our study seems to suggest that fatigue is related to high-grade breast skin erythema during radiotherapy through the increase of cytokines levels. Vitaliana De Sanctis, Linda Agolli, Vincenzo Visco, Flavia Monaco, Roberta Muni, Alessandra Spagnoli, Barbara Campanella, Maurizio Valeriani, Giuseppe Minniti, Mattia F. Osti, Claudio Amanti, Patrizia Pellegrini, Serena Brunetti, Anna Costantini, Marco Alfò, Maria Rosaria Torrisi, Paolo Marchetti, and Riccardo Maurizi Enrici Copyright © 2014 Vitaliana De Sanctis et al. All rights reserved. Precursor Lesions for Sporadic Pancreatic Cancer: PanIN, IPMN, and MCN Mon, 24 Mar 2014 06:29:34 +0000 http://www.hindawi.com/journals/bmri/2014/474905/ Pancreatic cancer is still a dismal disease. The high mortality rate is mainly caused by the lack of highly sensitive and specific diagnostic tools, and most of the patients are diagnosed in an advanced and incurable stage. Knowledge about precursor lesions for pancreatic cancer has grown significantly over the last decade, and nowadays we know that mainly three lesions (PanIN, and IPMN, MCN) are responsible for the development of pancreatic cancer. The early detection of these lesions is still challenging but provides the chance to cure patients before they might get an invasive pancreatic carcinoma. This paper focuses on PanIN, IPMN, and MCN lesions and reviews the current level of knowledge and clinical measures. M. Distler, D. Aust, J. Weitz, C. Pilarsky, and Robert Grützmann Copyright © 2014 M. Distler et al. All rights reserved. BMP-4 Genetic Variants and Protein Expression Are Associated with Platinum-Based Chemotherapy Response and Prognosis in NSCLC Wed, 19 Mar 2014 13:52:23 +0000 http://www.hindawi.com/journals/bmri/2014/801640/ To explore the role of genetic polymorphisms of bone morphogenic proteins 4 (BMP-4) in the response to platinum-based chemotherapy and the clinical outcome in patients with advanced nonsmall cell lung cancer (NSCLC), 938 patients with stage III (A+B) or IV NSCLC were enrolled in this study. We found that the variant genotypes of 6007C > T polymorphisms significantly associated with the chemotherapy response. The 6007CC genotype carriers had a higher chance to be responder to chemotherapy (adjusted odd ratio = 2.77; 95% CI: 1.83–4.18; adjusted < 0.001). The 6007C > T polymorphisms and BMP-4 expression also affect the prognosis of NSCLC. Patients with high BMP-4 expression had a significantly higher chance to be resistant to chemotherapy than those with low BMP-4 expression (OR = 2.81; 95% CI: 1.23–6.44; ). The hazard ratio (HR) for 6007TT was 2.37 times higher than 6007CC (). In summary, the 6007C > T polymorphism of BMP-4 gene and BMP-4 tissue expression may be used as potential predictor for the chemotherapy response and prognosis of advanced NSCLC. Sun Xian, Lang Jilu, Tian Zhennan, Zhou Yang, Hu Yang, Geng Jingshu, and Fu Songbin Copyright © 2014 Sun Xian et al. All rights reserved. EZH2 Silencing with RNA Interference Induces G2/M Arrest in Human Lung Cancer Cells In Vitro Tue, 18 Mar 2014 11:28:40 +0000 http://www.hindawi.com/journals/bmri/2014/348728/ Nonsmall-cell lung cancer has a high mortality rate and poor prognosis. In the present study, we silenced EZH2 and explored the consequent cell cycle changes. The expression of cell-cycle-related proteins, including p53, p21, Cdc2, and cyclin B1, was detected with western blotting, and the cell cycle distribution was determined with flow cytometry. Inhibition of EZH2 expression changed the cell cycle distribution, in particular inducing G2/M arrest. Expression of Cdc2 and cyclin B1 was significantly decreased in A549 and HTB-56 cells after EZH2-siRNA treatment. In addition, p53 expression was increased by 21% and 18%, and p21 expression was increased by 31% and 23%, in A549 and HTB-56 cells, respectively, in the presence of EZH2-siRNA. This study clearly demonstrates that modulation of EZH2 expression with siRNA affects the cell cycle and the expression levels of p53 and p21, thereby changing cyclin B1 and Cdc2 expression and inducing G2/M arrest. These results may explain the observed antitumor activity of EZH2 silencing. Such explorations of the molecular mechanism of EZH2 will help us develop novel approaches to the diagnosis, treatment, and prevention of nonsmall-cell lung cancer. Hui Xia, Wen Zhang, Yingjie Li, Nannan Guo, and Changhai Yu Copyright © 2014 Hui Xia et al. All rights reserved. The Role of Hypoxia-Inducible Factor-1α, Glucose Transporter-1, (GLUT-1) and Carbon Anhydrase IX in Endometrial Cancer Patients Wed, 12 Mar 2014 10:22:09 +0000 http://www.hindawi.com/journals/bmri/2014/616850/ Hypoxia-inducible factor-1 (HIF-1), glucose transporter-1 (GLUT-1), and carbon anhydrase IX (CAIX) are important molecules that allow adaptation to hypoxic environments. The aim of our study was to investigate the correlation between HIF-1, GLUT-1, and CAIX protein level with the clinicopathological features of endometrial cancer patients. Materials and Methods. 92 endometrial cancer patients, aged 37–84, were enrolled to our study. In all patients clinical stage, histologic grade, myometrial invasion, lymph node, and distant metastases were determined. Moreover, the survival time was assessed. Immunohistochemical analyses were performed on archive formalin fixed paraffin embedded tissue sections. Results. High significant differences were reported between HIF-1 expression and the histologic subtype of cancer. Higher HIF-1 expression was associated with the higher risk of recurrence . The results of GLUT-1 and CAIX expression did not reveal any significant differences between the proteins expression in the primary tumor and the clinicopathological features. Conclusion. The important role of HIF-1 in the group of patients with the high risk of recurrence and the negative histologic subtype of the tumor suggest that the expression of this factor might be useful in the panel of accessory pathomorphological tests and could be helpful in establishing more accurate prognosis in endometrial cancer patients. Pawel Sadlecki, Magdalena Bodnar, Marek Grabiec, Andrzej Marszalek, Pawel Walentowicz, Alina Sokup, Jolanta Zegarska, and Małgorzata Walentowicz-Sadlecka Copyright © 2014 Pawel Sadlecki et al. All rights reserved. Liquiritigenin Induces Tumor Cell Death through Mitogen-Activated Protein Kinase- (MPAKs-) Mediated Pathway in Hepatocellular Carcinoma Cells Tue, 11 Mar 2014 06:58:11 +0000 http://www.hindawi.com/journals/bmri/2014/965316/ Liquiritigenin (LQ), separated from Glycyrrhiza radix, possesses anti-inflammatory, antihyperlipidemic, and antiallergic effects. Our present study aims to investigate the antihepatocellular carcinoma effects of LQ both in cell and animal models. LQ strikingly reduced cell viability, enhanced apoptotic rate, induced lactate dehydrogenase over-release, and increased intracellular reactive oxygen species (ROS) level and caspase 3 activity in both PLC/PRL/5 and HepG2 cells. The expression of cleaved PARP, the hall-marker of apoptosis, was enhanced by LQ. LQ treatment resulted in a reduction of the expressions of B-cell lymphoma 2 (Bcl-2) and B-cell lymphoma-extra large (Bcl-xL), and an increase of the phosphorylation of c-Jun N-terminal kinases (JNK) and P38. LQ-mediated cell viability reduction, mitochondrial dysfunction, apoptosis related protein abnormal expressions, and JNK and P38 activation were partially abolished by N-Acetyl-L-cysteine (a ROS inhibitor) pretreatment. Moreover, LQ suppressed the activation of extracellular signaling-regulated kinase (ERKs) and reduced the translocation of phosphor-ERKs from cytoplasm to nucleus. This antitumor activity was further confirmed in PLC/PRL/5-xenografted mice model. All these data indicate that the antihepatocellular carcinoma effects of LQ are related to its modulation of the activations of mitogen-activated protein kinase (MAPKs). The study provides experimental evidence supporting LQ as a potential therapeutic agent for hepatocellular carcinoma treatment. Di Wang, Jiahui Lu, Yan Liu, Qingfan Meng, Jing Xie, Zhenzuo Wang, and Lesheng Teng Copyright © 2014 Di Wang et al. All rights reserved. Evidence for the Existence of Triple-Negative Variants in the MCF-7 Breast Cancer Cell Population Tue, 04 Mar 2014 12:54:06 +0000 http://www.hindawi.com/journals/bmri/2014/836769/ The MCF-7 line, derived in 1973 from a malignant pleural effusion, is one of the most commonly used culture models for human breast cancer. Despite its long history, MCF-7 is a surprisingly heterogeneous line. We previously showed that if MCF-7 cells were cultured for a prolonged period either in the absence of estrogen or in the presence of the antiestrogen tamoxifen, sub-lines were selected that differed from the parental line in ploidy, mean cell volume, signaling pathway usage, and drug sensitivity. This suggests a process of selection of preexisting variants rather than of adaptation of the parental line. All the sublines were estrogen receptor (ER) positive, raising the question of whether MCF-7 also contains ER negative variants. Here, we have looked for such variants by culturing for a prolonged period in the presence of fulvestrant, an estrogen antagonist that has no estrogen agonist activity. Three sublines were developed, each of which was ER negative, progesterone receptor (PR) negative and expressed only a low level of HER2. Each of the variants differed from the original MCF-7 line in ploidy, modal cell volume, and signaling pathway usage. Control experiments in which cells were cultured for a prolonged period in the absence of estrogen selected for variants that were ER and PR positive. The properties of the triple-negative MCF-7 were compared with those of an existing triple-negative cell line, MDA-MB-231, and human epidermal growth factor receptor 2 (HER2)+ SKBr3, as well as from those of the “immortalized” breast epithelial line MCF10A. The results suggest that new variants or phenotypes of MCF-7 might be generated continuously in culture, and by implication this might apply to breast cancer development and even normal breast epithelial development in vivo. Euphemia Leung, Ji Eun Kim, Marjan Askarian-Amiri, Graeme J. Finlay, and Bruce C. Baguley Copyright © 2014 Euphemia Leung et al. All rights reserved. Impact of Immunogenetic IL28B Polymorphism on Natural Outcome of HCV Infection Wed, 26 Feb 2014 11:49:25 +0000 http://www.hindawi.com/journals/bmri/2014/710642/ With the aim of investigating whether interleukin 28B gene (IL28B) rs1297860 polymorphism is associated with different hepatitis C (HCV) infection statuses, we compared IL28B allelic distribution in an Italian case series of 1050 patients with chronic infection and different outcomes, 47 individuals who spontaneously cleared HCV, and 178 blood donors. Furthermore, we compared IL28B variants among 3882 Caucasian patients with chronic infection, 397 with spontaneous clearance, and 1366 blood donors reported in PubMed. Overall data confirmed a relation between IL28B C allele and HCV spontaneous clearance. Furthermore, we found that IL28B T allele had a weak relation with chronic HCV progression to hepatocellular carcinoma. Study findings are in accordance with the hepatocellular carcinogenic model where IL28B TT genotype, by promoting a persistent chronic hepatitis which leads to both hepatocyte injury and chronic inflammation, could facilitate HCC development. Conversely, patients with lymphoproliferative disorders had not any significantly different IL28B rs1297860 allelic distribution than those with chronic HCV, but, like all chronic HCV-related diseases, they showed a lower CC frequency than patients who spontaneously cleared HCV. Study results confirmed the model of persistent HCV infection as a risk factor for the pathogenesis of both liver and lymphoproliferative disorders. Valli De Re, Laura Gragnani, Elisa Fognani, Alessia Piluso, Francesco Izzo, Alessandra Mangia, Marina Crovatto, Graziella Gava, Pietro Casarin, Domenico Sansonno, Vito Racanelli, Salvatore De Vita, Pietro Pioltelli, Laura Caggiari, Mariangela De Zorzi, Massimiliano Berretta, Andrea Gini, Antonella Zucchetto, Franco Maria Buonaguro, Paolo De Paoli, and Anna Linda Zignego Copyright © 2014 Valli De Re et al. All rights reserved. ELFN1-AS1: A Novel Primate Gene with Possible MicroRNA Function Expressed Predominantly in Human Tumors Mon, 24 Feb 2014 17:18:19 +0000 http://www.hindawi.com/journals/bmri/2014/398097/ Human gene LOC100505644 uncharacterized LOC100505644 [Homo sapiens] (Entrez Gene ID 100505644) is abundantly expressed in tumors but weakly expressed in few normal tissues. Till now the function of this gene remains unknown. Here we identified the chromosomal borders of the transcribed region and the major splice form of the LOC100505644-specific transcript. We characterised the major regulatory motifs of the gene and its splice sites. Analysis of the secondary structure of the major transcript variant revealed a hairpin-like structure characteristic for precursor microRNAs. Comparative genomic analysis of the locus showed that it originated in primates de novo. Taken together, our data indicate that human gene LOC100505644 encodes some non-protein coding RNA, likely a microRNA. It was assigned a gene symbol ELFN1-AS1 (ELFN1 antisense RNA 1 (non-protein coding)). This gene combines features of evolutionary novelty and predominant expression in tumors. Dmitrii E. Polev, Iuliia K. Karnaukhova, Larisa L. Krukovskaya, and Andrei P. Kozlov Copyright © 2014 Dmitrii E. Polev et al. All rights reserved. Aberrant Glycosylation as Biomarker for Cancer: Focus on CD43 Thu, 13 Feb 2014 11:41:46 +0000 http://www.hindawi.com/journals/bmri/2014/742831/ Glycosylation is a posttranslational modification of proteins playing a major role in cell signalling, immune recognition, and cell-cell interaction because of their glycan branches conferring structure variability and binding specificity to lectin ligands. Aberrant expression of glycan structures as well as occurrence of truncated structures, precursors, or novel structures of glycan may affect ligand-receptor interactions and thus interfere with regulation of cell adhesion, migration, and proliferation. Indeed, aberrant glycosylation represents a hallmark of cancer, reflecting cancer-specific changes in glycan biosynthesis pathways such as the altered expression of glycosyltransferases and glycosidases. Most studies have been carried out to identify changes in serum glycan structures. In most cancers, fucosylation and sialylation are significantly modified. Thus, aberrations in glycan structures can be used as targets to improve existing serum cancer biomarkers. The ability to distinguish differences in the glycosylation of proteins between cancer and control patients emphasizes glycobiology as a promising field for potential biomarker identification. In this review, we discuss the aberrant protein glycosylation associated with human cancer and the identification of protein glycoforms as cancer biomarkers. In particular, we will focus on the aberrant CD43 glycosylation as cancer biomarker and the potential to exploit the UN1 monoclonal antibody (UN1 mAb) to identify aberrant CD43 glycoforms. Franca Maria Tuccillo, Annamaria de Laurentiis, Camillo Palmieri, Giuseppe Fiume, Patrizia Bonelli, Antonella Borrelli, Pierfrancesco Tassone, Iris Scala, Franco Maria Buonaguro, Ileana Quinto, and Giuseppe Scala Copyright © 2014 Franca Maria Tuccillo et al. All rights reserved. Technical Advancement of Radiation Therapy Tue, 11 Feb 2014 09:36:04 +0000 http://www.hindawi.com/journals/bmri/2014/797412/ Tsair-Fwu Lee, Jack Yang, Eng-Yen Huang, Chung-Chi Lee, Maria F. Chan, and An Liu Copyright © 2014 Tsair-Fwu Lee et al. All rights reserved. The Low Chamber Pancreatic Cancer Cells Had Stem-Like Characteristics in Modified Transwell System: Is It a Novel Method to Identify and Enrich Cancer Stem-Like Cells? Mon, 10 Feb 2014 11:49:44 +0000 http://www.hindawi.com/journals/bmri/2014/760303/ Cancer stem cells (CSCs) or cancer-initiating cells (CICs) play an important role in tumor initiation, progression, metastasis, chemoresistance, and recurrence. It is important to construct an effective method to identify and isolate CSCs for biotherapy of cancer. During the past years, many researchers had paid more attention to it; however, this method was still on seeking. Therefore, compared to the former methods that were used to isolate the cancer stem cell, in the present study, we tried to use modified transwell system to isolate and enrich CSCs from human pancreatic cancer cell lines (Panc-1). Our results clearly showed that the lower chamber cells in modified transwell system were easily forming spheres; furthermore, these spheres expressed high levels of stem cell markers (CD133/CD44/CD24/Oct-4/ESA) and exhibited chemoresistance, underwent epithelial-to-mesenchymal transition (EMT), and possessed the properties of self-renewal in vitro and tumorigenicity in vivo. Therefore, we speculated that modified transwell assay system, as a rapid and effective method, can be used to isolate and enrich CSCs. Dongqing Wang, Haitao Zhu, Yanfang Liu, Qing Liu, Xiaodong Xie, Yuepeng Zhou, Lirong Zhang, Yan Zhu, Zhijian Zhang, and Zhaoliang Su Copyright © 2014 Dongqing Wang et al. All rights reserved. Role of ROBO4 Signalling in Developmental and Pathological Angiogenesis Thu, 06 Feb 2014 06:01:17 +0000 http://www.hindawi.com/journals/bmri/2014/683025/ Transmembrane roundabout receptor family members (ROBO1–ROBO4) principally orchestrate the neuronal guidance mechanism of the nervous system. Secreted glycoprotein SLITs are the most appreciated ligands for ROBOs. Recently identified ROBO4 is the key mediator of SLIT-ROBO mediated developmental and pathological angiogenesis. Although SLIT2 has been shown to interact with ROBO4 as ligand, it remains an open question whether this protein is the physiologic partner of ROBO4. The purpose of this review is to summarise how reliable SLIT2 as ligand for ROBO4 is, if not what the other possible mechanisms demonstrated till date for ROBO4 mediated developmental and pathological angiogenesis are. We conclude that ROBO4 is expressed specially in vascular endothelial cells and maintains the vascular integrity via either SLIT2 dependent or SLIT2 independent manner. On the contrary, it promotes the pathological angiogenesis by involving different signalling arm(s)/unknown ligand(s). This review explores the interactions SLIT2/ROBO1, SLIT2/ROBO1–ROBO4, ROBO1/ROBO4, and ROBO4/UNC5B which can be promising and potential therapeutic targets for developmental angiogenesis defects and pathological angiogenesis. Finally we have reviewed the ROBO4 signalling pathways and made an effort to elaborate the insight of this signalling as therapeutic target of pathological angiogenesis. Suresh Singh Yadav and Gopeshwar Narayan Copyright © 2014 Suresh Singh Yadav and Gopeshwar Narayan. All rights reserved. CDK/CCN and CDKI Alterations for Cancer Prognosis and Therapeutic Predictivity Wed, 29 Jan 2014 09:38:14 +0000 http://www.hindawi.com/journals/bmri/2014/361020/ The regulation of cell growth and division occurs in an accurate sequential manner. It is dictated by the accumulation of cyclins (CCNs) and cyclin-dependent kinases (CDKs) complexes and degradation of CCNs. In human tumors, instead, the cell cycle is deregulated, causing absence of differentiation and aberrant cell growth. Oncogenic alterations of CCNs, CDKs, and CDKIs have been reported in more than 90% of human cancers, and the most frequent are those related to the G1 phase. Several molecular mechanisms, including gene overexpression, chromosomal translocations, point mutations, insertions and deletions, missense and frame shift mutation, splicing, or methylation, may be responsible for these alterations. The cell cycle regulators are involved in tumor progression given their association with cancers characterized by higher incidence of relapses and chemotherapy resistance. In the last decade anticancer drug researches focused on new compounds, able to target molecules related to changes in genes associated with tumor status. Recently, the studies have focused on the restoration of cell cycle control modulating molecular targets involved in cancer-cell alterations. This paper aims to correlate alterations of cell cycle regulators with human cancers and therapeutic responsivity. Patrizia Bonelli, Franca Maria Tuccillo, Antonella Borrelli, Antonietta Schiattarella, and Franco Maria Buonaguro Copyright © 2014 Patrizia Bonelli et al. All rights reserved. Induction of Apoptosis in Human Multiple Myeloma Cell Lines by Ebselen via Enhancing the Endogenous Reactive Oxygen Species Production Mon, 27 Jan 2014 08:31:40 +0000 http://www.hindawi.com/journals/bmri/2014/696107/ Ebselen a selenoorganic compound showing glutathione peroxidase like activity is an anti-inflammatory and antioxidative agent. Its cytoprotective activity has been investigated in recent years. However, experimental evidence also shows that ebselen causes cell death in several cancer cell types whose mechanism has not yet been elucidated. In this study, we examined the effect of ebselen on multiple myeloma (MM) cell lines in vitro. The results showed that ebselen significantly enhanced the production of reactive oxygen species (ROS) accompanied by cell viability decrease and apoptosis rate increase. Further studies revealed that ebselen can induce Bax redistribution from the cytosol to mitochondria leading to mitochondrial membrane potential ΔΨm changes and cytochrome C release from the mitochondria to cytosol. Furtherly, we found that exogenous addition of N-acetyl cysteine (NAC) completely diminished the cell damage induced by ebselen. This result suggests that relatively high concentration of ebselen can induce MM cells apoptosis in culture by enhancing the production of endogenous ROS and triggering mitochondria mediated apoptotic pathway. Liang Zhang, Liwei Zhou, Jia Du, Mengxia Li, Chengyuan Qian, Yi Cheng, Yang Peng, Jiayin Xie, and Dong Wang Copyright © 2014 Liang Zhang et al. All rights reserved. Molecular Mechanism Underlying Lymphatic Metastasis in Pancreatic Cancer Wed, 22 Jan 2014 07:25:20 +0000 http://www.hindawi.com/journals/bmri/2014/925845/ As the most challenging human malignancies, pancreatic cancer is characterized by its insidious symptoms, low rate of surgical resection, high risk of local invasion, metastasis and recurrence, and overall dismal prognosis. Lymphatic metastasis, above all, is recognized as an early adverse event in progression of pancreatic cancer and has been described to be an independent poor prognostic factor. It should be noted that the occurrence of lymphatic metastasis is not a casual or stochastic but an ineluctable and designed event. Increasing evidences suggest that metastasis-initiating cells (MICs) and the microenvironments may act as a double-reed style in this crime. However, the exact mechanisms on how they function synergistically for this dismal clinical course remain largely elusive. Therefore, a better understanding of its molecular and cellular mechanisms involved in pancreatic lymphatic metastasis is urgently required. In this review, we will summarize the latest advances on lymphatic metastasis in pancreatic cancer. Zhiwen Xiao, Guopei Luo, Chen Liu, Chuntao Wu, Liang Liu, Zuqiang Liu, Quanxing Ni, Jiang Long, and Xianjun Yu Copyright © 2014 Zhiwen Xiao et al. All rights reserved. The Preoperative Maximum Standardized Uptake Value Measured by 18F-FDG PET/CT as an Independent Prognostic Factor of Overall Survival in Endometrial Cancer Patients Mon, 20 Jan 2014 00:00:00 +0000 http://www.hindawi.com/journals/bmri/2014/234813/ Purpose. The aim of this study was to determine if the preoperative maximum standardized uptake value (SUVmax) measured by 18F-FDG PET/CT in the primary tumor has prognostic value in the group of patients with endometrial cancer. Patients, Materials, and Methods. A total of one hundred one consecutive endometrial cancer patients, age range 40–82 years (mean 62 years) and FIGO I–IV stage, who underwent 18-FDG-PET/CT within two weeks prior radical surgery, were enrolled to the study. The maximum SUV was measured and compared with the clinicopathologic features of surgical specimens. The relationship between SUVmax and overall survival was analyzed. Results. The mean preoperative SUVmax was 14.34; range (3.90–33.80) and was significantly lower for FIGO I than for higher stages (), as well as for grade 1 than for grade 2 and 3 (), deep myometrial invasion () and for high risk group (). The analysis of survival ROC curve revealed SUVmax cut-off value of 17.7 to predict high risk of recurrence. Endometrial cancer patients with SUVmax higher than 17.7 characterized by lower overall survival. Conclusion. The preoperative SUVmax measured by 18F-FDG PET/CT is considered as an important indicator reflecting tumor aggressiveness which may predict poor prognosis. High value of SUVmax would be useful for making noninvasive diagnoses and deciding the appropriate therapeutic strategy for patients with endometrial cancer. Malgorzata Walentowicz-Sadlecka, Bogdan Malkowski, Pawel Walentowicz, Pawel Sadlecki, Andrzej Marszalek, Tomasz Pietrzak, and Marek Grabiec Copyright © 2014 Malgorzata Walentowicz-Sadlecka et al. All rights reserved. Magnetic Resonance-Guided Laser Induced Thermal Therapy for Glioblastoma Multiforme: A Review Thu, 16 Jan 2014 13:52:45 +0000 http://www.hindawi.com/journals/bmri/2014/761312/ Magnetic resonance-guided laser induced thermotherapy (MRgLITT) has become an increasingly relevant therapy for tumor ablation due to its minimally invasive approach and broad applicability across many tissue types. The current state of the art applies laser irradiation via cooled optical fiber applicators in order to generate ablative heat and necrosis in tumor tissue. Magnetic resonance temperature imaging (MRTI) is used concurrently with this therapy to plan treatments and visualize tumor necrosis. Though application in neurosurgery remains in its infancy, MRgLITT has been found to be a promising therapy for many types of brain tumors. This review examines the current use of MRgLITT with regard to the special clinical challenge of glioblastoma multiforme and examines the potential applications of next-generation nanotherapy specific to the treatment of glioblastoma. Sarah E. Norred and Jacqueline Anne Johnson Copyright © 2014 Sarah E. Norred and Jacqueline Anne Johnson. All rights reserved. Oncogenic Processes Thu, 16 Jan 2014 13:20:53 +0000 http://www.hindawi.com/journals/bmri/2014/879013/ Rita de Cassia Stocco, Franco Peppino Roperto, Lubna Nasir, and Marcelo Palma Sircili Copyright © 2014 Rita de Cassia Stocco et al. All rights reserved. Tumor Initiating Cells and Chemoresistance: Which Is the Best Strategy to Target Colon Cancer Stem Cells? Wed, 15 Jan 2014 16:15:43 +0000 http://www.hindawi.com/journals/bmri/2014/859871/ There is an emerging body of evidence that chemoresistance and minimal residual disease result from selective resistance of a cell subpopulation from the original tumor that is molecularly and phenotypically distinct. These cells are called “cancer stem cells” (CSCs). In this review, we analyze the potential targeting strategies for eradicating CSCs specifically in order to develop more effective therapeutic strategies for metastatic colon cancer. These include induction of terminal epithelial differentiation of CSCs or targeting some genes expressed only in CSCs and involved in self-renewal and chemoresistance. Ideal targets could be cell regulators that simultaneously control the stemness and the resistance of CSCs. Another important aspect of cancer biology, which can also be harnessed to create novel broad-spectrum anticancer agents, is the Warburg effect, also known as aerobic glycolysis. Actually, little is yet known with regard to the metabolism of CSCs population, leaving an exciting unstudied avenue in the dawn of the emerging field of metabolomics. Emanuela Paldino, Valentina Tesori, Patrizia Casalbore, Antonio Gasbarrini, and Maria Ausiliatrice Puglisi Copyright © 2014 Emanuela Paldino et al. All rights reserved. State of the Art in the Studies on Crotamine, a Cell Penetrating Peptide from South American Rattlesnake Wed, 15 Jan 2014 16:11:55 +0000 http://www.hindawi.com/journals/bmri/2014/675985/ Animal venoms comprise a naturally selected cocktail of bioactive peptides/proteins and other molecules, each of which playing a defined role thanks to the highly specific interactions with diverse molecular targets found in the prey. Research focused on isolation, structural, and functional characterizations of novel natural biologics (bioactive peptides/proteins from natural sources) has a long way to go through from the basic science to clinical applications. Herein, we overview the structural and functional characteristics of the myoneurotoxin crotamine, firstly isolated from the South American rattlesnake venom. Crotamine is the first venom peptide classified as a natural cell penetrating and antimicrobial peptide (CPP and AMP) with a more pronounced antifungal activity. In contrast to other known natural CPPs and AMPs, crotamine demonstrates a wide spectrum of biological activities with potential biotechnological and therapeutic values. More recent studies have demonstrated the selective in vitro anticancer activity of crotamine. In vivo, using a murine melanoma model, it was shown that crotamine delays tumor implantation, inhibits tumor cells proliferation, and also increases the survival of mice engrafted with subcutaneous melanoma. The structural and functional properties and also the possible biotechnological applications of minimized molecules derived from crotamine are also discussed. Irina Kerkis, Mirian A. F. Hayashi, Alvaro R. B. Prieto da Silva, Alexandre Pereira, Paulo Luiz De Sá Júnior, Andre J. Zaharenko, Gandhi Rádis-Baptista, Alexandre Kerkis, and Tetsuo Yamane Copyright © 2014 Irina Kerkis et al. All rights reserved. Investigating the Feasibility of Rapid MRI for Image-Guided Motion Management in Lung Cancer Radiotherapy Sun, 12 Jan 2014 16:58:04 +0000 http://www.hindawi.com/journals/bmri/2014/485067/ Cycle-to-cycle variations in respiratory motion can cause significant geometric and dosimetric errors in the administration of lung cancer radiation therapy. A common limitation of the current strategies for motion management is that they assume a constant, reproducible respiratory cycle. In this work, we investigate the feasibility of using rapid MRI for providing long-term imaging of the thorax in order to better capture cycle-to-cycle variations. Two nonsmall-cell lung cancer patients were imaged (free-breathing, no extrinsic contrast, and 1.5 T scanner). A balanced steady-state-free-precession (b-SSFP) sequence was used to acquire cine-2D and cine-3D (4D) images. In the case of Patient 1 (right midlobe lesion, ~40 mm diameter), tumor motion was well correlated with diaphragmatic motion. In the case of Patient 2, (left upper-lobe lesion, ~60 mm diameter), tumor motion was poorly correlated with diaphragmatic motion. Furthermore, the motion of the tumor centroid was poorly correlated with the motion of individual points on the tumor boundary, indicating significant rotation and/or deformation. These studies indicate that image quality and acquisition speed of cine-2D MRI were adequate for motion monitoring. However, significant improvements are required to achieve comparable speeds for truly 4D MRI. Despite several challenges, rapid MRI offers a feasible and attractive tool for noninvasive, long-term motion monitoring. Amit Sawant, Paul Keall, Kim Butts Pauly, Marcus Alley, Shreyas Vasanawala, Billy W. Loo Jr., Jacob Hinkle, and Sarang Joshi Copyright © 2014 Amit Sawant et al. All rights reserved. Isocitrate Dehydrogenase-1 Mutations as Prognostic Biomarker in Glioblastoma Multiforme Patients in West Bohemia Thu, 09 Jan 2014 10:01:24 +0000 http://www.hindawi.com/journals/bmri/2014/735659/ Introduction. Glioblastoma multiforme (GBM) is the most malignant primary brain tumor in adults. Recent whole-genome studies revealed novel GBM prognostic biomarkers such as mutations in metabolic enzyme IDH—isocitrate dehydrogenases (IDH1 and IDH2). The distinctive mutation IDH1 R132H was uncovered to be a strong prognostic biomarker for glioma patients. We investigated the prognostic role of IDH1 R132H mutation in GBM patients in West Bohemia. Methods. The IDH1 R132H mutation was assessed by the RT-PCR in the tumor samples from 45 GBM patients treated in the Faculty Hospital in Pilsen and was correlated with the progression free and overall survival. Results. The IDH1 R132H mutation was identified in 20 from 44 GBM tumor samples (45.4%). The majority of mutated tumors were secondary GBMs (16 in 18, 89.9%). Low frequency of IDH1 mutations was observed in primary GBMs (4 in 26, 15.3%). Patients with IDH R132H mutation had longer PFS, 136 versus 51 days (, Wilcoxon), and OS, 270 versus 130 days (, Wilcoxon test). Summary. The prognostic value of IDH1 R132H mutation in GBM patients was verified. Patients with mutation had significantly longer PFS and OS than patients with wild-type IDH1 and suffered more likely from secondary GBMs. J. Polivka, J. Polivka Jr., V. Rohan, M. Pesta, T. Repik, P. Pitule, and O. Topolcan Copyright © 2014 J. Polivka et al. All rights reserved. Beta-Catenin and Epithelial Tumors: A Study Based on 374 Oropharyngeal Cancers Wed, 08 Jan 2014 07:52:48 +0000 http://www.hindawi.com/journals/bmri/2014/948264/ Introduction. Although altered regulation of the Wnt pathway via beta-catenin is a frequent event in several human cancers, its potential implications in oral/oropharyngeal squamous cell carcinomas (OSCC/OPSCC) are largely unexplored. Work purpose was to define association between beta-catenin expression and clinical-pathological parameters in 374 OSCCs/OP-SCCs by immunohistochemistry (IHC). Materials and Methods. Association between IHC detected patterns of protein expression and clinical-pathological parameters was assessed by statistical analysis and survival rates by Kaplan-Meier curves. Beta-catenin expression was also investigated in OSCC cell lines by Real-Time PCR. An additional analysis of the DNA content was performed on 22 representative OSCCs/OPSCCs by DNA-image-cytometric analysis. Results and Discussion. All carcinomas exhibited significant alterations of beta-catenin expression (). Beta-catenin protein was mainly detected in the cytoplasm of cancerous cells and only focal nuclear positivity was observed. Higher cytoplasmic expression correlated significantly with poor histological differentiation, advanced stage, and worst patient outcome (). By Real-Time PCR significant increase of beta-catenin mRNA was detected in OSCC cell lines and in 45% of surgical specimens. DNA ploidy study demonstrated high levels of aneuploidy in beta-catenin overexpressing carcinomas. Conclusions. This is the largest study reporting significant association between beta-catenin expression and clinical-pathological factors in patients with OSCCs/OPSCCs. Angela Santoro, Giuseppe Pannone, Silvana Papagerakis, H. Stan McGuff, Barbara Cafarelli, Silvia Lepore, Salvatore De Maria, Corrado Rubini, Marilena Mattoni, Stefania Staibano, Ernesto Mezza, Gaetano De Rosa, Gabriella Aquino, Simona Losito, Carla Loreto, Salvatore Crimi, Pantaleo Bufo, and Lorenzo Lo Muzio Copyright © 2014 Angela Santoro et al. All rights reserved. The Functional Role of MnSOD as a Biomarker of Human Diseases and Therapeutic Potential of a New Isoform of a Human Recombinant MnSOD Mon, 06 Jan 2014 07:05:58 +0000 http://www.hindawi.com/journals/bmri/2014/476789/ Reactive oxygen species (ROS) are generated as a consequence of metabolic reactions in the mitochondria of eukaryotic cells. This work describes the role of the manganese superoxide dismutase (MnSOD) as a biomarker of different human diseases and proposes a new therapeutic application for the prevention of cancer and its treatment. The paper also describes how a new form of human MnSOD was discovered, its initial application, and its clinical potentials. The MnSOD isolated from a human liposarcoma cell line (LSA) was able to kill cancer cells expressing estrogen receptors, but it did not have cytotoxic effects on normal cells. Together with its oncotoxic activity, the recombinant MnSOD (rMnSOD) exerts a radioprotective effect on normal cells irradiated with X-rays. The rMnSOD is characterized by the presence of a leader peptide, which allows the protein to enter cells: this unique property can be used in the radiodiagnosis of cancer or chemotherapy, conjugating radioactive substances or chemotherapic drugs to the leader peptide of the MnSOD. Compared to traditional chemotherapic agents, the drugs conjugated with the leader peptide of MnSOD can selectively reach and enter cancer cells, thus reducing the side effects of traditional treatments. Antonella Borrelli, Antonietta Schiattarella, Patrizia Bonelli, Franca Maria Tuccillo, Franco Maria Buonaguro, and Aldo Mancini Copyright © 2014 Antonella Borrelli et al. All rights reserved. New Molecules and Old Drugs as Emerging Approaches to Selectively Target Human Glioblastoma Cancer Stem Cells Thu, 02 Jan 2014 11:25:01 +0000 http://www.hindawi.com/journals/bmri/2014/126586/ Despite relevant progress obtained by multimodal treatment, glioblastoma (GBM), the most aggressive primary brain tumor, is still incurable. The most encouraging advancement of GBM drug research derives from the identification of cancer stem cells (CSCs), since these cells appear to represent the determinants of resistance to current standard therapies. The goal of most ongoing studies is to identify drugs able to affect CSCs biology, either inducing selective toxicity or differentiating this tumor cell population into nontumorigenic cells. Moreover, the therapeutic approach for GBM could be improved interfering with chemo- or radioresistance mechanisms, microenvironment signals, and the neoangiogenic process. During the last years, molecular targeted compounds such as sorafenib and old drugs, like metformin, displayed interesting efficacy in preclinical studies towards several tumors, including GBM, preferentially affecting CSC viability. In this review, the latest experimental results, controversies, and prospective application concerning these promising anticancer drugs will be discussed. Roberto Würth, Federica Barbieri, and Tullio Florio Copyright © 2014 Roberto Würth et al. All rights reserved. Deregulation of the miRNAs Expression in Cervical Cancer: Human Papillomavirus Implications Tue, 31 Dec 2013 12:58:38 +0000 http://www.hindawi.com/journals/bmri/2013/407052/ MicroRNAs (miRNAs) are a class of small non coding RNAs of 18–25 nucleotides in length. The temporal or short-lived expression of the miRNAs modulates gene expression post transcriptionally. Studies have revealed that miRNAs deregulation correlates and is involved with the initiation and progression of human tumors. Cervical cancer (CC) displays notably increased or decreased expression of a large number of cellular oncogenic or tumor suppressive miRNAs, respectively. However, understanding the potential role of miRNAs in CC is still limited. In CC, the high-risk human papillomaviruses (HR-HPVs) infection can affect the miRNAs expression through oncoprotein E6 and E7 that contribute to viral pathogenesis, although other viral proteins might also be involved. This deregulation in the miRNAs expression has an important role in the hallmarks of CC. Interestingly, the miRNA expression profile in CC can discriminate between normal and tumor tissue and the extraordinary stability of miRNAs makes it suitable to serve as diagnostic and prognostic biomarkers of cancer. In this review, we will summarize the role of the HR-HPVs in miRNA expression, the role of miRNAs in the hallmarks of CC, and the use of miRNAs as potential prognostic biomarkers in CC. Yazmín Gómez-Gómez, Jorge Organista-Nava, and Patricio Gariglio Copyright © 2013 Yazmín Gómez-Gómez et al. All rights reserved. Radiobiology of Radiosurgery for the Central Nervous System Sun, 29 Dec 2013 15:37:24 +0000 http://www.hindawi.com/journals/bmri/2013/362761/ According to Leksell radiosurgery is defined as “the delivery of a single, high dose of irradiation to a small and critically located intracranial volume through the intact skull.” Before its birth in the early 60s and its introduction in clinical therapeutic protocols in late the 80s dose application in radiation therapy of the brain for benign and malignant lesions was based on the administration of cumulative dose into a variable number of fractions. The rationale of dose fractionation is to lessen the risk of injury of normal tissue surrounding the target volume. Radiobiological studies of cell culture lines of malignant tumors and clinical experience with patients treated with conventional fractionated radiotherapy helped establishing this radiobiological principle. Radiosurgery provides a single high dose of radiation which translates into a specific toxic radiobiological response. Radiobiological investigations to study the effect of high dose focused radiation on the central nervous system began in late the 50s. It is well known currently that radiobiological principles applied for dose fractionation are not reproducible when single high dose of ionizing radiation is delivered. A review of the literature about radiobiology of radiosurgery for the central nervous system is presented. Antonio Santacroce, Marcel A. Kamp, Wilfried Budach, and Daniel Hänggi Copyright © 2013 Antonio Santacroce et al. All rights reserved. Stat3 Upregulates Leucine-Rich Repeat-Containing G Protein-Coupled Receptor 4 Expression in Osteosarcoma Cells Wed, 25 Dec 2013 11:00:51 +0000 http://www.hindawi.com/journals/bmri/2013/310691/ The activation of signal transducer and activator of transcription 3 (Stat3) signaling is the common hallmark in various human cancers including osteosarcoma. In the present study, according to PCR-based microarrays using cDNA prepared from interleukin-6 (IL-6) treated osteosarcoma cells, we found that leucine-rich repeat-containing G protein-coupled receptor 4 (LGR4) was a transcriptional target of Stat3. Overexpression of Stat3 promoted LGR4 expression, while its deficiency using small interfering RNA (siRNA) reduced LGR4 expression. Furthermore, we identified a Stat3 binding motif located at −556 to −549 bp in the LGR4 promoter that is able to interact with Stat3. Thus, our results suggest a previously unknown Stat3-LGR4 molecular network, which may control osteosarcoma development and progression. Jia Liu, Wei Wei, Chang-An Guo, Ning Han, Jian-feng Pan, Teng Fei, and Zuo-qin Yan Copyright © 2013 Jia Liu et al. All rights reserved. Expression Analysis of SPARC/Osteonectin in Oral Squamous Cell Carcinoma Patients: From Saliva to Surgical Specimen Mon, 16 Dec 2013 11:50:23 +0000 http://www.hindawi.com/journals/bmri/2013/736438/ Oral squamous cell carcinoma (OSCC) remains a significant cause of morbidity and mortality, with approximately 540,000 new cases annually worldwide. The molecular mechanisms related to the pathogenesis of this disease are still poorly understood. The discovery of a molecular marker that allows the early detection of this cancer, which can be easily identified in biological samples, such as saliva, without intervening in advanced stages, is a challenge. Numerous studies have identified a panel of molecular markers differently expressed in OSCC and normal oral mucosa. In particular, it was found an aberrant expression of matricellular glycoprotein SPARC. SPARC is involved in normal tissue remodeling, regulating the deposition of extracellular matrix, but also in neoplastic transformation. In fact, aberrant SPARC expression was detected both in stromal cells associated with cancer and in tumor cells. The aim of our study was the evaluation of SPARC on a retrospective series of 119 OSCC cases and the validation of the obtained data on a prospective series of 27 patients with OSCC, of whom we have previously collected saliva, and smeared material. The obtained results were correlated with each other and with clinical pathological parameters at our disposal. The study demonstrated a prognostic value of SPARC, especially with regard to its expression in the stroma surrounding OSCC (P < 0.05). Gabriella Aquino, Rocco Sabatino, Monica Cantile, Corrado Aversa, Franco Ionna, Gerardo Botti, Elvira La Mantia, Francesca Collina, Gabriella Malzone, Giuseppe Pannone, Nunzia Simona Losito, Renato Franco, and Francesco Longo Copyright © 2013 Gabriella Aquino et al. All rights reserved. Preoperative Chemoradiotherapy in Elderly Patients with Locally Advanced Rectal Cancer Thu, 12 Dec 2013 11:57:48 +0000 http://www.hindawi.com/journals/bmri/2013/610786/ Purpose. To evaluate the treatment tolerance and clinical outcomes in patients aged 70 and older with locally advanced rectal carcinoma treated with multimodality approach. Methods and Materials. We retrospectively analysed 20 consecutive elderly patients, with histologically proven rectal adenocarcinoma, staged T3-4, and/or node-positive tumour, who received chemoradiotherapy and proceeded to surgical approach. Performance status score and adult comorbidity evaluation-27 score were calculated, and their influence on treatment tolerance and clinical outcomes was analysed. Results. All patients completed programmed chemoradiotherapy treatment. Gastrointestinal toxicity was the most common acute side effects: proctitis in 70% of patients and diarrhoea in 55%, classified as Grade 3 in 3 patients only. Radiation dermatitis was reported in 7 patients (35%) and it was graded G3 in one patient. There was no haematological toxicity. Eighteen patients out of 20 underwent surgery. Sphincter preservation was assured in 13 patients. Comorbidity index was related to higher severe acute toxicity () but no influenced treatment outcomes. Conclusion. Treatment tolerance with combined modality is good in elderly patients. Due to age, no dose reduction for radiation therapy and chemotherapy should be considered. Francesca De Felice, Daniela Musio, Luciano Izzo, Federico Pugliese, Paolo Izzo, Antonio Bolognese, and Vincenzo Tombolini Copyright © 2013 Francesca De Felice et al. All rights reserved. Viral and Cellular Biomarkers in the Diagnosis of Cervical Intraepithelial Neoplasia and Cancer Mon, 09 Dec 2013 17:38:52 +0000 http://www.hindawi.com/journals/bmri/2013/519619/ Cervical cancer arises from cells localized in the ectoendocervical squamocolumnar junction of the cervix persistently infected with one of about 13 human papillomavirus (HPV) genotypes. The majority of HPV infections induces low grade squamous epithelial lesions that in more than 90% of cases spontaneously regress and in about 10% eventually progress to high grade lesions and even less frequently evolve to invasive cancer. Tumor progression is characterized by (1) increased expression of E6 and E7 genes of high risk HPVs, known to bind to and inactivate p53 and pRb oncosuppressors, respectively; (2) integration of viral DNA into host genome, with disruption of E2 viral genes and host chromosomal loci; and (3) molecular alterations of key regulators of cell cycle. Molecular markers with high sensitivity and specificity in differentiating viral infections associated with cellular abnormalities with high risk of progression are strongly needed for cervical cancer screening and triage. This review will focus on the analysis of clinical validated or candidate biomarkers, such as HPV DNA, HPV E6/E7 mRNA, HPV proteins, p16(INK4a) and Ki67, TOP2A and MCM2 cellular factors, and DNA methylation profiles, which will likely improve the identification of premalignant lesions that have a high risk to evolve into invasive cervical cancer. Maria Lina Tornesello, Luigi Buonaguro, Paolo Giorgi-Rossi, and Franco M. Buonaguro Copyright © 2013 Maria Lina Tornesello et al. All rights reserved. The Function of miRNA in Hepatic Cancer Stem Cell Sun, 08 Dec 2013 08:28:33 +0000 http://www.hindawi.com/journals/bmri/2013/358902/ Hepatocellular carcinoma (HCC) is the fifth most common cancer worldwide and ranks third in the leading causes of cancer patient’s death. Cancer stem cells (HSCs), also known as tumor-initiating cells, have been reported in multiple subtypes of HCC and are considered as the master regulators of HCC initiation, chemotherapy drug resistance, tumor metastasis, and progression. In spite of their clinical importance, the detailed mechanism about how HSCs are intricately regulated in the molecular level remains elusive. MicroRNA (miRNA), a class of newly emerging small noncoding RNAs, has been demonstrated to serve as a vital player in modulating a number of biological activities ranging from embryogenesis to programmed cell death as well as the maintenance of HSCs. In this review, we synthesize these latest findings of miRNA regulation of HSCs and try to elucidate their mechanistic roles in orchestrating cellular equilibrium. This recent progress underlies the functional role of miRNA in cellular transformation of liver cancer, which has largely extended our knowledge how HSCs are controlled by miRNA network, and in the development of novel miRNA-based anticancer therapies specifically targeting HSCs in the coming future. Wei Qi, Weicheng Liang, Huiqing Jiang, and Mary Miuyee Waye Copyright © 2013 Wei Qi et al. All rights reserved. Proteomic Analysis of PTCH1+/− Fibroblast Lysate and Conditioned Culture Media Isolated from the Skin of Healthy Subjects and Nevoid Basal Cell Carcinoma Syndrome Patients Wed, 04 Dec 2013 13:55:47 +0000 http://www.hindawi.com/journals/bmri/2013/794028/ Background. The pathogenesis underlying the increased predisposition to the development of basal cell carcinomas (BCCs) in the context of Gorlin-Goltz syndrome is linked to molecular mechanisms that differ from sporadic BCCs. Patients with Gorlin syndrome tend to develop multiple BCCs at an early age and present with tumors of non-sun-exposed skin. The aim of this study was to compare the proteomic profile of cultured fibroblast and fibroblast conditioned culture media of PTCH1+ and nonmutated fibroblasts. Results. Proteomic analysis was performed using Surface-Enhanced Laser Desorption/Ionization Time-of-Flight mass spectrometry in PTCH1+ fibroblast conditioned media isolated from not affected sun-protected skin areas of Gorlin patients and from healthy subjects. 12 protein cluster peaks, >5 kDa, had significant differences in their peak intensities between PTCH1+ and PTCH1− subject groups. We detected a strongly MMP1 overexpression in PTCH1+ fibroblasts obtained from NBCCS patients with respect to healthy donors. Conclusion. Protein profiles in the fibroblast conditioned media revealed statistically significant differences between two different types (missense versus nonsense) of PTCH1 mutations. These differences could be useful as signatures to identify PTCH1 gene carriers at high risk for the development of NBCCS-associated malignancies and to develop novel experimental molecular tailored therapies based on these druggable targets. Giovanni Ponti, Giorgia Bertazzoni, Lorenza Pastorino, Emanuela Monari, Aurora Cuoghi, Stefania Bergamini, Elisa Bellei, Luisa Benassi, Paola Azzoni, Tiziana Petrachi, Cristina Magnoni, Giovanni Pellacani, Pietro Loschi, Annamaria Pollio, Alexander Michael Witkowski, and Aldo Tomasi Copyright © 2013 Giovanni Ponti et al. All rights reserved. Contour Propagation Using Feature-Based Deformable Registration for Lung Cancer Mon, 02 Dec 2013 11:15:11 +0000 http://www.hindawi.com/journals/bmri/2013/701514/ Accurate target delineation of CT image is a critical step in radiotherapy treatment planning. This paper describes a novel strategy for automatic contour propagation, based on deformable registration, for CT images of lung cancer. The proposed strategy starts with a manual-delineated contour in one slice of a 3D CT image. By means of feature-based deformable registration, the initial contour in other slices of the image can be propagated automatically, and then refined by active contour approach. Three algorithms are employed in the strategy: the Speeded-Up Robust Features (SURF), Thin-Plate Spline (TPS), and an adapted active contour (Snake), used to refine and modify the initial contours. Five pulmonary cancer cases with about 400 slices and 1000 contours have been used to verify the proposed strategy. Experiments demonstrate that the proposed strategy can improve the segmentation performance in the pulmonary CT images. Jaccard similarity (JS) mean is about 0.88 and the maximum of Hausdorff distance (HD) is about 90%. In addition, delineation time has been considerably reduced. The proposed feature-based deformable registration method in the automatic contour propagation improves the delineation efficiency significantly. Yuhan Yang, Shoujun Zhou, Peng Shang, En Qi, Shibin Wu, and Yaoqin Xie Copyright © 2013 Yuhan Yang et al. All rights reserved. Detection of EGFR Mutations by TaqMan Mutation Detection Assays Powered by Competitive Allele-Specific TaqMan PCR Technology Sun, 01 Dec 2013 16:06:49 +0000 http://www.hindawi.com/journals/bmri/2013/385087/ Epidermal growth factor receptor (EGFR) mutations in non-small-cell lung cancer (NSCLC) are predictive of response to treatment with tyrosine kinase inhibitors. Competitive Allele-Specific TaqMan PCR (castPCR) is a highly sensitive and specific technology. EGFR mutations were assessed by TaqMan Mutation Detection Assays (TMDA) based on castPCR technology in 64 tumor samples: a training set of 30 NSCLC and 6 colorectal carcinoma (CRC) samples and a validation set of 28 NSCLC cases. The sensitivity and specificity of this method were compared with routine diagnostic techniques including direct sequencing and the EGFR Therascreen RGQ kit. Analysis of the training set allowed the identification of the threshold value for data analysis (0.2); the maximum cycle threshold (); and the cut-off ΔCt value (7) for the EGFR TMDA. By using these parameters, castPCR technology identified both training and validation set EGFR mutations with similar frequency as compared with the Therascreen kit. Sequencing detected rare mutations that are not identified by either castPCR or Therascreen, but in samples with low tumor cell content it failed to detect common mutations that were revealed by real-time PCR based methods. In conclusion, our data suggest that castPCR is highly sensitive and specific to detect EGFR mutations in NSCLC clinical samples. Cristin Roma, Claudia Esposito, Anna Maria Rachiglio, Raffaella Pasquale, Alessia Iannaccone, Nicoletta Chicchinelli, Renato Franco, Rita Mancini, Salvatore Pisconti, Antonella De Luca, Gerardo Botti, Alessandro Morabito, and Nicola Normanno Copyright © 2013 Cristin Roma et al. All rights reserved. Molecular Markers for Prostate Cancer in Formalin-Fixed Paraffin-Embedded Tissues Mon, 25 Nov 2013 09:14:08 +0000 http://www.hindawi.com/journals/bmri/2013/283635/ Prostate cancer (PCa) is the most frequently diagnosed type of cancer in developed countries. The decisive method of diagnosis is based on the results of biopsies, morphologically evaluated to determine the presence or absence of cancer. Although this approach leads to a confident diagnosis in most cases, it can be improved by using the molecular markers present in the tissue. Both miRNAs and proteins are considered excellent candidates for biomarkers in formalin-fixed paraffin-embedded (FFPE) tissues, due to their stability over long periods of time. In the last few years, a concerted effort has been made to develop the necessary tools for their reliable measurement in these types of samples. Furthermore, the use of these kinds of markers may also help in establishing tumor grade and aggressiveness, as well as predicting the possible outcomes in each particular case for the different treatments available. This would aid clinicians in the decision-making process. In this review, we attempt to summarize and discuss the potential use of microRNA and protein profiles in FFPE tissue samples as markers to better predict PCa diagnosis, progression, and response to therapy. Tamara Sequeiros, Marta García, Melania Montes, Mireia Oliván, Marina Rigau, Eva Colás, Inés de Torres, Juan Morote, Jaume Reventós, and Andreas Doll Copyright © 2013 Tamara Sequeiros et al. All rights reserved. Chromogenic In Situ Hybridization and p16/Ki67 Dual Staining on Formalin-Fixed Paraffin-Embedded Cervical Specimens: Correlation with HPV-DNA Test, E6/E7 mRNA Test, and Potential Clinical Applications Sun, 24 Nov 2013 11:07:38 +0000 http://www.hindawi.com/journals/bmri/2013/453606/ Although HPV-DNA test and E6/E7 mRNA analyses remain the current standard for the confirmation of human papillomavirus (HPV) infections in cytological specimens, no universally adopted techniques exist for the detection of HPV in formalin-fixed paraffin-embedded samples. Particularly, in routine laboratories, molecular assays are still time-consuming and would require a high level of expertise. In this study, we investigated the possible use of a novel HPV tyramide-based chromogenic in situ hybridization (CISH) technology to locate HPV on tissue specimens. Then, we evaluate the potential usefulness of /Ki-67 double stain on histological samples, to identify cervical cells expressing HPV E6/E7 oncogenes. In our series, CISH showed a clear signal in 95.2% of the specimens and reached a sensitivity of 86.5%. CISH positivity always matched with HPV-DNA positivity, while 100% of cases with punctated signal joined with cervical intraepithelial neoplasia grade 2 or worse (CIN2+). p16/Ki67 immunohistochemistry gave an interpretable result in 100% of the cases. The use of dual stain significantly increased the agreement between pathologists, which reached 100%. Concordance between dual stain and E6/E7 mRNA test was 89%. In our series, both CISH and /Ki67 dual stain demonstrated high grade of performances. In particular, CISH would help to distinguish episomal from integrated HPV, in order to allow conclusions regarding the prognosis of the lesion, while /Ki67 dual stain approach would confer a high level of standardization to the diagnostic procedure. Roberta Zappacosta, Antonella Colasante, Patrizia Viola, Tommaso D’Antuono, Giuseppe Lattanzio, Serena Capanna, Daniela Maria Pia Gatta, and Sandra Rosini Copyright © 2013 Roberta Zappacosta et al. All rights reserved. Plasma Levels of Soluble HLA-E and HLA-F at Diagnosis May Predict Overall Survival of Neuroblastoma Patients Thu, 21 Nov 2013 15:42:35 +0000 http://www.hindawi.com/journals/bmri/2013/956878/ The purpose of this study was to identify the plasma/serum biomarkers that are able to predict overall survival (OS) of neuroblastoma (NB) patients. Concentration of soluble (s) biomarkers was evaluated in plasma (sHLA-E, sHLA-F, chromogranin, and B7H3) or serum (calprotectin) samples from NB patients or healthy children. The levels of biomarkers that were significantly higher in NB patients were then analyzed considering localized or metastatic subsets. Finally, biomarkers that were significantly different in these two subsets were correlated with patient’s outcome. With the exception of B7H3, levels of all molecules were significantly higher in NB patients than those in controls. However, only chromogranin, sHLA-E, and sHLA-F levels were different between patients with metastatic and localized tumors. sHLA-E and -F levels correlated with each other but not chromogranin. Chromogranin levels correlated with different event-free survival (EFS), whereas sHLA-E and -F levels also correlated with different OS. Association with OS was also detected considering only patients with metastatic disease. In conclusion, low levels of sHLA-E and -F significantly associated with worse EFS/OS in the whole cohort of NB patients and in patients with metastatic NB. Thus, these molecules deserve to be tested in prospective studies to evaluate their predictive power for high-risk NB patients. Fabio Morandi, Giuliana Cangemi, Sebastiano Barco, Loredana Amoroso, Maria Giuliano, Anna Rita Gigliotti, Vito Pistoia, and Maria Valeria Corrias Copyright © 2013 Fabio Morandi et al. All rights reserved. What Would Be the Most Appropriate Ratio in the Setting of Stereotactic Body Radiation Therapy for Early Stage Non-Small Cell Lung Cancer Wed, 20 Nov 2013 08:58:21 +0000 http://www.hindawi.com/journals/bmri/2013/391021/ We hypothesize that the correlation between the radiation dose expressed as the biologically effective dose (BED) and the clinical endpoints will correlate better as the value of the ratio is increased to >10 Gy, which theoretically minimizes the overestimation of the dose potency associated with the linear quadratic (LQ) formula in the setting of stereotactic body radiation therapy (SBRT) for early stage non-small cell lung cancer (NSCLC). A search was conducted in the PubMed electronic databases in August 2011. In the studies analyzed, increasing the ratio is associated with an increase in the strength of the correlation between isocenter BED and local control, especially in the studies with median followup of ≥24 months, for which Spearman’s correlation coefficients of 0.74–0.76 were achieved for of 20 Gy, 30 Gy, and 50 Gy ( 0.007–0.008). A trend toward statistical significance was observed for the correlation of isocenter BED and the 2-year overall survival when an of 20 Gy was used approached statistical significance (). Our results suggest that an  Gy may be more appropriate for the prediction of dose response in the setting of lung SBRT. Alexander Chi, Sijin Wen, Zhongxing Liao, Jack Fowler, Jiahong Xu, Nam P. Nguyen, James S. Welsh, and Ritsuko Komaki Copyright © 2013 Alexander Chi et al. All rights reserved. P-Glycoprotein-Activity Measurements in Multidrug Resistant Cell Lines: Single-Cell versus Single-Well Population Fluorescence Methods Sun, 17 Nov 2013 08:47:09 +0000 http://www.hindawi.com/journals/bmri/2013/676845/ Background. P-gp expression has been linked to the efflux of chemotherapeutic drugs in human cancers leading to multidrug resistance. Fluorescence techniques have been widely applied to measure the P-gp activity. In this paper, there is a comparison between the advantages of two fluorescence approaches of commonly available and affordable instruments: the microplate reader (MPR) and the flow cytometer to detect the P-gp efflux activity using calcein-AM. Results. The selectivity, sensibility, and reproducibility of the two methods have been defined. Our results showed that the MPR is more powerful for the detection of small inhibition, whereas the flow cytometry method is more reliable at higher concentrations of the inhibitors. We showed that to determine precisely the inhibition efficacy the flow cytometry is better; hence, to get the correct Emax and EC50 values, we cannot only rely on the MPR. Conclusion. Both techniques can potentially be used extensively in the pharmaceutical industry for high-throughput drug screening and in biology laboratories for academic research, monitoring the P-gp efflux in specific assays. Jennifer Pasquier, Damien Rioult, Nadine Abu-Kaoud, Sabine Marie, Arash Rafii, Bella S. Guerrouahen, and Frank Le Foll Copyright © 2013 Jennifer Pasquier et al. All rights reserved. CYP19 Genetic Polymorphism Haplotype AASA Is Associated with a Poor Prognosis in Premenopausal Women with Lymph Node-Negative, Hormone Receptor-Positive Breast Cancer Thu, 14 Nov 2013 14:35:00 +0000 http://www.hindawi.com/journals/bmri/2013/562197/ Given the critical role of CYP19 in estrogen synthesis, we investigated the influence of CYP19 gene polymorphisms on the clinical outcome of lymph node- (LN-) negative, hormone receptor- (HR-) positive early breast cancers. Genotyping for the CYP19 polymorphisms rs4646 (A/C), rs1065779 (A/C), CYP19 (TTTA)n (short allele/long (S/L) allele using the 7 TTTA repeat polymorphism as the cut-off), and rs1870050 (A/C) was performed on 296 patients with LN-negative, HR-positive breast cancers. All patients received adjuvant hormonal therapy. Associations were examined between these 4 genotypes and 6 common haplotypes of CYP19 and distant disease-free survival (DDFS), disease-free survival (DFS), and overall survival (OS). Patients were divided into the 6 subhaplotypes of CCLA (41.1%), AASA (17.1%), CASA (11.9%), CCLC (8.9%), CCSA (7.5%), AASC (8.9%), and others (4.6%). In premenopausal patients, haplotype AASA was significantly associated with a poor DDFS (adjusted hazard ratio (aHR), 3.3; ), DFS (aHR, 2.5; ), and OS (aHR, 2.9; ) after adjusting for age, tumor size, tumor grade, estrogen receptor status, progesterone receptor status, chemotherapy, pathology, adjuvant hormone therapy, menopausal status, and radiotherapy. Furthermore, haplotype AASA remained a negative prognostic factor for premenopausal patients receiving adjuvant chemotherapy in terms of DDFS (aHR, 4.5; ), DFS (HR, 3.2; ), and OS (HR, 6.4; ). However, in postmenopausal patients, haplotype AASA was not associated with a poor prognosis, whereas the AASC haplotype was significantly associated with a poor DFS (aHR, 3.1; ) and OS (aHR, 4.4; ). Our results indicate that, in patients with LN-negative, HR-positive breast cancers, genetic polymorphism haplotype AASA is associated with poor survival of premenopausal women but does not affect survival of postmenopausal women. Sung-Hsin Kuo, Shi-Yi Yang, Huang-Chun Lien, Chiao Lo, Ching-Hung Lin, Yen-Sen Lu, Ann-Lii Cheng, King-Jeng Chang, and Chiun-Sheng Huang Copyright © 2013 Sung-Hsin Kuo et al. All rights reserved. Immune Modulation and Stereotactic Radiation: Improving Local and Abscopal Responses Thu, 14 Nov 2013 11:44:24 +0000 http://www.hindawi.com/journals/bmri/2013/658126/ New and innovative treatment strategies for cancer patients in the fields of immunotherapy and radiotherapy are rapidly developing in parallel. Among the most promising preclinical treatment approaches is combining immunotherapy with radiotherapy where early data suggest synergistic effects in several tumor model systems. These studies demonstrate that radiation combined with immunotherapy can result in superior efficacy for local tumor control. More alluring is the emergence of data suggesting an equally profound systemic response also known as “abscopal” effects with the combination of radiation and certain immunotherapies. Studies addressing optimal radiation dose, fractionation, and modality to be used in combination with immunotherapy still require further exploration. However, recent anecdotal clinical reports combining stereotactic or hypofractionated radiation regimens with immunotherapy have resulted in dramatic sustained clinical responses, both local and abscopal. Technologic advances in clinical radiation therapy has made it possible to deliver hypofractionated regimens anywhere in the body using stereotactic radiation techniques, facilitating further clinical investigations. Thus, stereotactic radiation in combination with immunotherapy agents represents an exciting and potentially fruitful new space for improving cancer therapeutic responses. Jing Zeng, Timothy J. Harris, Michael Lim, Charles G. Drake, and Phuoc T. Tran Copyright © 2013 Jing Zeng et al. All rights reserved. The Synergistic Effects of Low Dose Fluorouracil and TRAIL on TRAIL-Resistant Human Gastric Adenocarcinoma AGS Cells Wed, 13 Nov 2013 08:50:57 +0000 http://www.hindawi.com/journals/bmri/2013/293874/ The TNF-related apoptosis-inducing ligand (TRAIL) is a TNF family member which has been under intense focus because of its remarkable ability to induce apoptosis in malignant human cells while leaving normal cells unscathed. However, many cancer cells remain resistant to TRAIL. In this study, we had investigated the synergistic effects of low dose fluorouracil (5-Fu) and TRAIL on TRAIL-resistant human gastric adenocarcinoma AGS cells and explored the potential mechanisms. Cell viability was analyzed by sulforhodamine B (SRB) assay and the synergistic effects were evaluated by Jin’s formula and confirmed by both morphological changes under inverted microscope and flow cytometry. The expression of TRAIL-R1 (death receptor 4, DR4), TRAIL-R2 (DR5), TRAIL-R3 (decoy receptor, DcR1), TRAIL-R4 (DcR2), procaspase-3, procaspase-8, and procaspase-9 was detected by western blotting. Our results showed that there were significant synergistic effects of low dose 5-Fu and TRAIL on TRAIL-resistant AGS cells, and this effect was supposed to be mediated by decreasing DcR2 expression and increasing DR5 expression. The extrinsic and intrinsic apoptosis pathways were both activated. The data suggest that combined treatment of low dose 5-Fu and TRAIL can be an effective therapeutic approach for gastric adenocarcinoma. Hong Zhu, Min Huang, Daoling Ren, Jianping He, Fen Zhao, Cheng Yi, and Ying Huang Copyright © 2013 Hong Zhu et al. All rights reserved. Clinical Evaluation of CyberKnife in the Treatment of Vestibular Schwannomas Sun, 10 Nov 2013 10:48:42 +0000 http://www.hindawi.com/journals/bmri/2013/297093/ Objective. This study assessed the posttreatment tumor control and auditory function of vestibular schwannoma (VS) patients after CyberKnife (CK) and analyzed the possible prognostic factors of hearing loss. Methods. We retrospectively studied 117 VS patients, with Gardner-Robertson (GR) classification grades I to IV, who underwent CK between 2006 and 2012. Data including radiosurgery treatment parameters, pre- and postoperative tumor size, and auditory function were collected and examined. Results. With CK, 117 patients had excellent tumor control rates (99.1%), with a mean imaging followup of 61.1 months. Excluding 52 patients (GR III-IV pretreatment), 53 (81.5%) of the remaining 65 patients (initial GR I-II) maintained GR I or II hearing after CK, with a mean audiometric followup of 64.5 months. Twelve patients experienced hearing degradation (91.6% were GR II pretreatment); they appeared to have significantly larger tumor sizes, significantly smaller cochlear sizes, and higher prescribed cochlear doses, compared to the patients with preserved hearing. Conclusion. Our data showed that CK treatment provided an excellent tumor control rate and a comparable hearing preservation rate in VS patients. Patients with pretreatment GR II hearing levels, larger tumor volumes, smaller cochlear sizes, and higher prescribed cochlear doses may have poor hearing prognoses. Jo-Ting Tsai, Jia-Wei Lin, Chien-Min Lin, Yuan-Hao Chen, Hsin-I Ma, Yee-Min Jen, Yi-Hsun Chen, and Da-Tong Ju Copyright © 2013 Jo-Ting Tsai et al. All rights reserved. Tyrosine Phosphorylation Modulates the Vascular Responses of Mesenteric Arteries from Human Colorectal Tumors Sun, 10 Nov 2013 10:07:14 +0000 http://www.hindawi.com/journals/bmri/2013/545983/ The aim of this study was to analyze whether tyrosine phosphorylation in tumoral arteries may modulate their vascular response. To do this, mesenteric arteries supplying blood flow to colorectal tumors or to normal intestine were obtained during surgery and prepared for isometric tension recording in an organ bath. Increasing tyrosine phosphorylation with the phosphatase inhibitor, sodium orthovanadate produced arterial contraction which was lower in tumoral than in control arteries, whereas it reduced the contraction to noradrenaline in tumoral but not in control arteries and reduced the relaxation to bradykinin in control but not in tumoral arteries. Protein expression of VEGF-A and of the VEGF receptor FLT1 was similar in control and tumoral arteries, but expression of the VEGF receptor KDR was increased in tumoral compared with control arteries. This suggests that tyrosine phosphorylation may produce inhibition of the contraction in tumoral mesenteric arteries, which may increase blood flow to the tumor when tyrosine phosphorylation is increased by stimulation of VEGF receptors. Eduardo Ferrero, María Dolores Mauricio, Miriam Granado, Oscar García-Villar, Martín Aldasoro, José María Vila, Manuel Hidalgo, Jorge Luis Ferrero, Nuria Fernández, Luis Monge, and Ángel Luis García-Villalón Copyright © 2013 Eduardo Ferrero et al. All rights reserved. Gamma Knife Surgery as Monotherapy with Clinically Relevant Doses Prolongs Survival in a Human GBM Xenograft Model Sun, 10 Nov 2013 09:13:06 +0000 http://www.hindawi.com/journals/bmri/2013/139674/ Object. Gamma knife surgery (GKS) may be used for recurring glioblastomas (GBMs). However, patients have then usually undergone multimodal treatment, which makes it difficult to specifically validate GKS independent of established treatments. Thus, we developed an experimental brain tumor model to assess the efficacy and radiotoxicity associated with GKS. Methods. GBM xenografts were implanted intracerebrally in nude rats, and engraftment was confirmed with MRI. The rats were allocated to GKS, with margin doses of 12 Gy or 18 Gy, or to no treatment. Survival time was recorded, tumor sections were examined, and radiotoxicity was evaluated in a behavioral open field test. Results. In the first series, survival from the time of implantation was 96 days in treated rats and 72 days in controls (). In a second experiment, survival was 72 days in the treatment group versus 54 days in controls (). Polynuclear macrophages and fibrosis was seen in groups subjected to GKS. Untreated rats with GBM xenografts displayed less mobility than GKS-treated animals in the open field test 4 weeks after treatment (). Conclusion. GKS administered with clinically relevant doses prolongs survival in rats harboring GBM xenografts, and the associated toxicity is mild. Bente Sandvei Skeie, Jian Wang, Ernest Dodoo, Jan Ingeman Heggdal, Janne Grønli, Linda Sleire, Sidsel Bragstad, Jeremy C. Ganz, Martha Chekenya, Sverre Mørk, Paal-Henning Pedersen, and Per Øyvind Enger Copyright © 2013 Bente Sandvei Skeie et al. All rights reserved. Indomethacin-Enhanced Anticancer Effect of Arsenic Trioxide in A549 Cell Line: Involvement of Apoptosis and Phospho-ERK and p38 MAPK Pathways Sun, 10 Nov 2013 09:03:49 +0000 http://www.hindawi.com/journals/bmri/2013/237543/ Background. Focusing on novel drug combinations that target different pathways especially apoptosis and MAPK could be a rationale for combination therapy in successful treatment of lung cancer. Concurrent use of cyclooxygenase (COX) inhibitors with arsenic trioxide (ATO) might be a possible treatment option. Methods. Cytotoxicity of ATO, dexamethasone (Dex), celecoxib (Cel), and Indomethacin (Indo) individually or in combination was determined at 24, 48, and 72 hrs in A549 lung cancer cells. The COX-2 gene and protein expression, MAPK pathway proteins, and caspase-3 activity were studied for the most cytotoxic combinations. Results. The IC50s of ATO and Indo were 68.7 μmol/L and 396.5 μmol/L, respectively. Treatment of cells with combinations of clinically relevant concentrations of ATO and Indo resulted in greater growth inhibition and apoptosis induction than did either agent alone. Caspase-3 activity was considerably high in the presence of ATO and Indo but showed no difference in single or combination use. Phosphorylation of p38 and ERK1/2 was remarkable in the concurrent presence of both drugs. Conclusions. Combination therapy with ATO and Indo exerted a very potent in vitro cytotoxic effect against A549 lung cancer cells. Activation of ERK and p38 pathways might be the mechanism of higher cytotoxic effect of ATO-Indo combination. Ali Mandegary, Maryam Torshabi, Mohammad Seyedabadi, Bagher Amirheidari, Elham Sharif, and Mohammad Hossein Ghahremani Copyright © 2013 Ali Mandegary et al. All rights reserved. Usefulness of Traditional Serum Biomarkers for Management of Breast Cancer Patients Thu, 07 Nov 2013 14:07:10 +0000 http://www.hindawi.com/journals/bmri/2013/685641/ The measurement of serum tumor markers levels in breast cancer (BC) patients is an economic and noninvasive diagnostic assay frequently requested by clinical oncologists to get information about the presence or absence of disease as well as its evolution. Despite their wide use in clinical practice, there is still an intense debate between scientific organizations about the real usefulness for patient monitoring during followup as well as response to therapy evaluation in case of advanced BC. In this review, we want to highlight the current recommendations published by scientific organizations about the use of “established” BC serum markers (CEA, TPA, TPS, CIFRA-21, CA15-3, and s-HER2) in clinical oncology practice. Moreover, we will focus on recent papers evidencing the usefulness of tumor markers levels measurement as a guide for the prescription and diagnostic integration of molecular imaging exams such as those performed by hybrid 18-fluorofeoxyglucose-positron emission tomography with integrated computed tomography. This technology is nowadays able to detect early cancer lesions undetectable by conventional morphological imaging investigation and most likely responsible for increasing of serum tumor markers levels. Peppino Mirabelli and Mariarosaria Incoronato Copyright © 2013 Peppino Mirabelli and Mariarosaria Incoronato. All rights reserved. A Comprehensive Focus on Global Spectrum of BRCA1 and BRCA2 Mutations in Breast Cancer Thu, 07 Nov 2013 09:15:14 +0000 http://www.hindawi.com/journals/bmri/2013/928562/ Breast cancer (BC) is the most common cancer of women all over the world. BRCA1 and BRCA2 gene mutations comprise the most important genetic susceptibility of BC. Except for few common mutations, the spectrum of BRCA1 and BRCA2 mutations is heterogeneous in diverse populations. 185AGdel and 5382insC are the most important BRCA1 and BRCA2 alterations which have been encountered in most of the populations. After those Ashkenazi founder mutations, 300T>G also demonstrated sparse frequency in African American and European populations. This review affords quick access to the most frequent alterations among various populations which could be helpful in BRCA screening programs. Fatemeh Karami and Parvin Mehdipour Copyright © 2013 Fatemeh Karami and Parvin Mehdipour. All rights reserved. A Combination of Radiosurgery and Soluble Tissue Factor Enhances Vascular Targeting for Experimental Glioblastoma Wed, 06 Nov 2013 14:46:30 +0000 http://www.hindawi.com/journals/bmri/2013/390714/ Radiosurgery for glioblastoma is limited to the development of resistance, allowing tumor cells to survive and initiate tumor recurrence. Based on our previous work that coadministration of tissue factor and lipopolysaccharide following radiosurgery selectively induced thrombosis in cerebral arteriovenous malformations, achieving thrombosis of 69% of the capillaries and 39% of medium sized vessels, we hypothesized that a rapid and selective shutdown of the capillaries in glioblastoma vasculature would decrease the delivery of oxygen and nutrients, reducing tumor growth, preventing intracranial hypertension, and improving life expectancy. Glioblastoma was formed by implantation of GL261 cells into C57Bl/6 mouse brain. Mice were intravenously injected tissue factor, lipopolysaccharide, a combination of both, or placebo 24 hours after radiosurgery. Control mice received both agents after sham irradiation. Coadministration of tissue factor and lipopolysaccharide led to the formation of thrombi in up to 87 ± 8% of the capillaries and 46 ± 4% of medium sized vessels within glioblastoma. The survival rate of mice in this group was 80% versus no survivor in placebo controls 30 days after irradiation. Animal body weight increased with time in this group (, ). Thus, radiosurgery enhanced treatment with tissue factor, and lipopolysaccharide selectively induces thrombosis in glioblastoma vasculature, improving life expectancy. Jian Tu, Zhiqiang Hu, and Zhongbin Chen Copyright © 2013 Jian Tu et al. All rights reserved. Effectiveness and Safety of Intensive Triplet Chemotherapy Plus Bevacizumab, FIr-B/FOx, in Young-Elderly Metastatic Colorectal Cancer Patients Wed, 06 Nov 2013 09:12:37 +0000 http://www.hindawi.com/journals/bmri/2013/143273/ Four-drug regimens, such as FIr-B/FOx schedule, can improve efficacy of first-line treatment of metastatic colorectal cancer (MCRC) patients. The present study specifically evaluates feasibility of FIr-B/FOx first-line intensive regimen in fit young-elderly MCRC patients, representing approximately 40% of overall MCRC patients. Activity, efficacy, and safety were equivalent to overall MCRC patients, not significantly different according to KRAS genotype. Clinical outcome was significantly prolonged in liver-limited compared to other/multiple metastatic disease. Safety evaluation of the individual young-elderly patient showed that limiting toxicity syndromes (LTS) in multiple sites were significantly increased, compared to LTS in single site, with respect to non-elderly patients. Gemma Bruera, Katia Cannita, Aldo Victor Giordano, Roberto Vicentini, Corrado Ficorella, and Enrico Ricevuto Copyright © 2013 Gemma Bruera et al. All rights reserved. Persistence or Clearance of Human Papillomavirus Infections in Women in Ouro Preto, Brazil Tue, 05 Nov 2013 15:04:03 +0000 http://www.hindawi.com/journals/bmri/2013/578276/ Persistent high-risk (HR) human papillomavirus (HPV) infection is necessary for development of precursor lesions and cervical cancer. We investigate persistence and clearance of HPV infections and cofactors in unvaccinated women. Cervical samples of 569 women (18–75 years), received for routine evaluation in the Health Department of Ouro Preto, Brazil, were collected and subjected to PCR (MY09/11 or GP5+/6+ primers), followed by RFLP or sequencing. All women were interviewed to collect sociodemographic and behavioral information. Viral infection persistence or clearance was reevaluated after 24 months and was observed in 59.6% and 40.4% of women, respectively. HPVs 16, 33, 59, 66, 69, and 83 (HR) were the most persistent types whereas HPVs 31, 45, and 58 were less persistent. Clearance or persistence did not differ between groups infected by HPVs 18, 53, and 67. In low-risk (LR) types, HPV 6 infected samples were associated with clearance, while HPV 11, 61, 72, or 81 infected samples were persistent in the follow-up. No statistically significant association was detected between persistent HPV infections and sociodemographic and behavioral characteristics analyzed. To study persistence or clearance in HPV infection allows the identification of risk groups, cofactors, and strategies for prevention of cervical cancer. P. M. Miranda, N. N. T. Silva, B. C. V. Pitol, I. D. C. G. Silva, J. L. Lima-Filho, R. F. Carvalho, R. C. Stocco, W. Beçak, and A. A. Lima Copyright © 2013 P. M. Miranda et al. All rights reserved. Side Population Cells as Prototype of Chemoresistant, Tumor-Initiating Cells Mon, 04 Nov 2013 13:12:52 +0000 http://www.hindawi.com/journals/bmri/2013/517237/ Classically, isolation of CSCs from tumors exploits the detection of cell surface markers associated with normal stem cells. Invariable expression of these cell surface markers in almost all proliferating tumor cells that albeit impart specific functionality, the universality, and clinical credibility of CSC phenotype based on markers is still dubious. Side Population (SP) cells, as defined by Hoechst dye exclusion in flow cytometry, have been identified in many solid tumors and cell lines and the SP phenotype can be considered as an enriched source of stem cells as well as an alternative source for the isolation of cancer stem cells especially when molecular markers for stem cells are unknown. SP cells may be responsible for the maintenance and propagation of tumors and the proportion of SP cells may be a predictor of patient outcome. Several of these markers used in cell sorting have emerged as prognostic markers of disease progression though it is seen that the development of new CSC-targeted strategies is often hindered by poor understanding of their regulatory networks and functions. This review intends to appraise the experimental progress towards enhanced isolation and drug screening based on property of acquired chemoresistance of cancer stem cells. Vinitha Richard, Madhumathy G. Nair, T. R. Santhosh Kumar, and M. Radhakrishna Pillai Copyright © 2013 Vinitha Richard et al. All rights reserved. Demethylation of Cancer/Testis Antigens and CpG ODN Stimulation Enhance Dendritic Cell and Cytotoxic T Lymphocyte Function in a Mouse Mammary Model Mon, 04 Nov 2013 09:17:43 +0000 http://www.hindawi.com/journals/bmri/2013/196894/ Background. Cancer/testis antigens (CTAs) are ideal targets for cancer immunotherapy in virtue of their restricted expression profile in normal tissues. However, CTA-targeted immunotherapy has been rather disappointing clinical setting for CTAs are downregulated by cytosine-phosphate-guanosine (CpG) methylation in their promoter regions, so that tumor cells have low immunogenicity. Methods. We reinduced mouse CTA P1A through demethylation process and generated P1A-specific cytotoxic lymphocytes (CTLs) by immunizing BALB/c (H-) mice with dendritic cells pulsed with a P1A-specific peptide and CpG oligodeoxynucleotide (ODN) immune adjuvant. Results. We found that demethylation and CpG ODN immune adjuvant stimulation facilitated DC maturation and enhanced the allogenic capacity of P1A-specific CTLs against target cells both in vitro and in vivo. Conclusions. Our results suggested that CTA induction and immune adjuvant stimulation is a feasible strategy in cancer immunotherapy. Jun-Zhong Sun, Lei Gao, Li Gao, Wei Wang, Nan Du, Juan Yang, Ling Wan, Fang Liu, Li-li Wang, and Li Yu Copyright © 2013 Jun-Zhong Sun et al. All rights reserved. PSF Knockdown Enhances Apoptosis via Downregulation of LC3B in Human Colon Cancer Cells Thu, 31 Oct 2013 11:05:05 +0000 http://www.hindawi.com/journals/bmri/2013/204973/ Our previous study demonstrated that PTB-associated splicing factor (PSF) is an important regulator of cell death and plays critical roles in the survival and growth of colon cancer cells. However, the molecular mechanism that activates these downstream signaling events remains unknown. To address this issue, we investigated the effects of PSF knockdown in two different colon cancer cell lines, DLD-1 and HT-29. We found that knockdown of PSF markedly decreased the autophagic molecule LC3B in DLD-1 cells but not in HT-29 cells. Furthermore, DLD-1 cells were more susceptible to PSF knockdown-induced cell growth inhibition and apoptosis than HT-29 cells. This susceptibility is probably a result of LC3B inhibition, given the known relationship between autophagy and apoptosis. C3B is associated with a number of physiological processes, including cell growth and apoptotic cell death. Our results suggest that autophagy is inhibited by PSF knockdown and that apoptosis and cell growth inhibition may act together to mediate the PSF-LC3B signaling pathway. Furthermore, we found that the peroxisome proliferator-activated receptor gamma (PPARγ)-PSF complex induced LC3B downregulation in DLD-1 cells. The results of this study identify a new physiological role for the PSF-LC3B axis as a potential endogenous modulator of colon cancer treatment. Tamotsu Tsukahara, Yoshikazu Matsuda, and Hisao Haniu Copyright © 2013 Tamotsu Tsukahara et al. All rights reserved. Crocus sativus L. (Saffron) Stigma Aqueous Extract Induces Apoptosis in Alveolar Human Lung Cancer Cells through Caspase-Dependent Pathways Activation Tue, 29 Oct 2013 11:07:59 +0000 http://www.hindawi.com/journals/bmri/2013/417928/ Worldwide, lung cancer is the most common form of cancer. Saffron has been used in folk medicine for centuries. We investigated the potential of saffron to induce cytotoxic and apoptotic effects in lung cancer cells (A549). We also examined the caspase-dependent pathways activation of saffron-induced apoptosis against the A549 cells. A549 cells were incubated with different concentrations of saffron extract; then cell morphological changes, cell viability, and apoptosis were determined by the normal invertmicroscope, MTT assay, Annexin V and propidium iodide, and flow cytometric analysis, respectively. Activated caspases were detected by treatment of saffron in lung cancer cells using fluorescein-labeled inhibitors of polycaspases. The proliferation of the A549 cells were decreased after treatment with saffron in a dose- and time-dependent manner. The percentage of apoptotic cells increased with saffron concentrations. Saffron induced morphological changes, decreased percentage of viable cells, and induced apoptosis. Saffron could induce apoptosis in the A549 cells and activate caspase pathways. The levels of caspases involved in saffron-induced apoptosis in the A549 cells indicating caspase-dependent pathway were induced by saffron. The anticancer activity of the aqueous extract of saffron could be attributed partly to its inhibition of the cell proliferation and induction of apoptosis in cancer cells through caspase-dependent pathways activation. Saeed Samarghandian, Abasalt Borji, Seyed Kazem Farahmand, Reza Afshari, and Saeideh Davoodi Copyright © 2013 Saeed Samarghandian et al. All rights reserved. Carbohydrate 19.9 Antigen Serum Levels in Liver Disease Sun, 27 Oct 2013 09:58:23 +0000 http://www.hindawi.com/journals/bmri/2013/531640/ Background. Carbohydrate 19.9 antigen (CA19.9) has been used in the diagnosis and followup of gastrointestinal tumours. The aim of this prospective longitudinal study was the evaluation of CA19.9 levels in patients with chronic hepatitis and hepatic cirrhosis hepatitis C virus and B virus correlated. Materials and Methods. 180 patients were enrolled, 116 with HCV-related chronic liver disease (48% chronic hepatitis, 52% cirrhosis) and 64 with HBV-related chronic liver disease (86% chronic hepatitis, 14% cirrhosis). Patients with high levels of CA19.9 underwent abdominal ecography, gastroendoscopy, colonoscopy, and abdominal CT scan. Results. 51.7% of patients with HCV-related chronic liver disease and 48.4% of those with HBV-related chronic liver disease presented high levels of CA19.9. None was affected by pancreatic or intestinal neoplasia, cholestatic jaundice, or other diseases potentially able to induce Ca19.9 elevations. CA19.9 levels were elevated in 43.3% of HCV chronic hepatitis, in 56.3% of HCV cirrhosis, in 45.1% of HBV chronic hepatitis, and in 58% of HBV cirrhosis. Conclusions. CA19.9 commonly increases in the serum of patients with chronic viral hepatitis. Elevation of CA 19.9 is not specific for neoplastic disease and is related to the severity of fibrosis and to the viral aetiology of hepatitis. Gaetano Bertino, Annalisa Maria Ardiri, Giuseppe Stefano Calvagno, Giulia Malaguarnera, Donatella Interlandi, Marco Vacante, Nicoletta Bertino, Francesco Lucca, Roberto Madeddu, and Massimo Motta Copyright © 2013 Gaetano Bertino et al. All rights reserved. A Light-Field-Based Method to Adjust On-Axis Rounded Leaf End MLC Position to Predict Off-Axis MLC Penumbra Region Dosimetric Performance in a Radiation Therapy Planning System Thu, 24 Oct 2013 19:30:18 +0000 http://www.hindawi.com/journals/bmri/2013/461801/ Purpose. An analytical and experimental study of split shape dose calculation correction by adjusting the position of the on-axis round leaf end position is presented. We use on-axis corrected results to predict off-axis penumbra region dosimetric performance in an intensity-modulated radiation therapy treatment planning system. Materials and Methods. The precise light-field edge position () was derived from the on-axis 50% dose position created by using the nominal light field for geometric and mathematical manipulation. Leaf position () could be derived from by defining in the treatment planning system for monitor unit calculation. On-axis offset (correction) could be obtained from the position corresponding to 50% of the central axis dose minus the position. The off-axis 50% dose position can then be derived from the on-axis 50% dose position. Results. The monitor unit calculation of the split shape using the on-axis rounded leaf end MLC penumbra region could provide an under-or overdose of 7.5% per millimeter without an offset correction. When using the on-axis rounded leaf end offset correction to predict the off-axis dose, the difference between the off- and on-axis 50% dose position is within ±1.5 mm. Conclusions. It is possible to achieve a dose calculation within 0.5% error for an adjusted MLC leaf edge location in the treatment planning system with careful measurement and an accurate on-axis offset correction. Dose calculations located at an off-axis spilt shape region should be used carefully due to noncorrectable errors which were found to be up to 10%. Jia-Ming Wu, Tsair-Fwu Lee, Shyh-An Yeh, Kuan-Yin Hsiao, Hsin-Hsiung Chen, Pei-Ju Chao, and Yi-Ting Chen Copyright © 2013 Jia-Ming Wu et al. All rights reserved. Interactive Multigrid Refinement for Deformable Image Registration Tue, 22 Oct 2013 15:03:03 +0000 http://www.hindawi.com/journals/bmri/2013/532936/ Deformable image registration is the spatial mapping of corresponding locations between images and can be used for important applications in radiotherapy. Although numerous methods have attempted to register deformable medical images automatically, such as salient-feature-based registration (SFBR), free-form deformation (FFD), and demons, no automatic method for registration is perfect, and no generic automatic algorithm has shown to work properly for clinical applications due to the fact that the deformation field is often complex and cannot be estimated well by current automatic deformable registration methods. This paper focuses on how to revise registration results interactively for deformable image registration. We can manually revise the transformed image locally in a hierarchical multigrid manner to make the transformed image register well with the reference image. The proposed method is based on multilevel B-spline to interactively revise the deformable transformation in the overlapping region between the reference image and the transformed image. The resulting deformation controls the shape of the transformed image and produces a nice registration or improves the registration results of other registration methods. Experimental results in clinical medical images for adaptive radiotherapy demonstrated the effectiveness of the proposed method. Wu Zhou and Yaoqin Xie Copyright © 2013 Wu Zhou and Yaoqin Xie. All rights reserved. The Treatment Outcome and Radiation-Induced Toxicity for Patients with Head and Neck Carcinoma in the IMRT Era: A Systematic Review with Dosimetric and Clinical Parameters Tue, 22 Oct 2013 09:26:01 +0000 http://www.hindawi.com/journals/bmri/2013/401261/ A descriptive analysis was made in terms of the related radiation induced acute and late mucositis and xerostomia along with survival and tumor control rates (significance level at 0.016, bonferroni correction), for irradiation in head and neck carcinomas with either 2D Radiation Therapy (2DRT) and 3D conformal (3DCRT) or Intensity Modulated Radiation Therapy (IMRT). The mean score of grade II xerostomia for IMRT versus 2-3D RT was 0.31 ± 0.23 and 0.56 ± 0.23, respectively (Mann Whitney, ). The parotid-dose for IMRT versus 2-3D RT was 29.56 ± 5.45 and 50.73 ± 6.79, respectively (Mann Whitney, ). The reported mean parotid-gland doses were significantly correlated with late xerostomia (spearman test, rho = 0.5013, ). A trend was noted for the superiority of IMRT concerning the acute oral mucositis. The 3-year overall survival for either IMRT or 2-3DRT was 89.5% and 82.7%, respectively (, Kruskal-Wallis test). The mean 3-year locoregional control rate was 83.6% (range: 70–97%) and 74.4 (range: 61–82%), respectively (, Kruskal-Wallis). In conclusion, no significant differences in terms of locoregional control, overall survival and acute mucositis could be noted, while late xerostomia is definitely higher in 2-3D RT versus IMRT. Patients with head and neck carcinoma should be referred preferably to IMRT techniques. Vassilis Kouloulias, Stella Thalassinou, Kalliopi Platoni, Anna Zygogianni, John Kouvaris, Christos Antypas, Efstathios Efstathopoulos, and Kelekis Nikolaos Copyright © 2013 Vassilis Kouloulias et al. All rights reserved. Effect of Adjuvant Magnetic Fields in Radiotherapy on Non-Small-Cell Lung Cancer Cells In Vitro Thu, 10 Oct 2013 11:45:19 +0000 http://www.hindawi.com/journals/bmri/2013/657259/ Objectives. To explore sensitization and possible mechanisms of adjuvant magnetic fields (MFs) in radiotherapy (RT) of non-small-cell lung cancer. Methods. Human A549 lung adenocarcinoma cells were treated with MF, RT, and combined MF-RT. Colony-forming efficiency was calculated, cell cycle and apoptosis were measured, and changes in cell cycle- and apoptosis-related gene expression were measured by microarray. Results. A 0.5 T, 8 Hz stationary MF showed a duration-dependent inhibitory effect lasting for 1–4 hours. The MF-treated groups had significantly greater cell inhibition than did controls (). Surviving fractions and growth curves derived from colony-forming assay showed that the MF-only, RT-only, and MF-RT groups had inhibited cell growth; the MF-RT group showed a synergetic effect. Microarray of A549 cells exposed for 1 hour to MF showed that 19 cell cycle- and apoptosis-related genes had 2-fold upregulation and 40 genes had 2-fold downregulation. MF significantly arrested cells in G2 and M phases, apparently sensitizing the cells to RT. Conclusions. MF may inhibit A549 cells and can increase their sensitivity to RT, possibly by affecting cell cycle- and apoptosis-related signaling pathways. Jianguo Feng, Huaying Sheng, Chihong Zhu, Hao Jiang, and Shenglin Ma Copyright © 2013 Jianguo Feng et al. All rights reserved. The Cytotoxic Effect of Magainin II on the MDA-MB-231 and M14K Tumour Cell Lines Wed, 09 Oct 2013 17:39:36 +0000 http://www.hindawi.com/journals/bmri/2013/831709/ Many studies have highlighted the tumoricidal properties of some natural peptides known to have antimicrobial virtues. Also, the increasingly higher resistance to conventional antibiotics has become a global public health issue, and the need for new antibiotics has stimulated interest in finding and synthesizing new antimicrobial peptides, which may also be used as chemotherapeutic agents. Relying on the literature, the purpose of our in vitro research was to assess the tumoricidal potential of magainin II on a series of tumour cell lines, namely, MDA-MB-231 (breast adenocarcinoma) and M14K (human mesothelioma). The experimental results of our study revealed that the cytotoxic effects of magainin II depend on its concentration. Its efficiency is significant at 120 μM concentrations, and, although it is much lower, it persists even at 60 μM concentrations. The effects were insignificant at 30 μM concentrations. In our experimental research, the tumoricidal effect of magainin II was not significantly dependent on the type of tumour cell line used. Radu Anghel, Daniela Jitaru, Laurenţiu Bădescu, Magda Bădescu, and Manuela Ciocoiu Copyright © 2013 Radu Anghel et al. All rights reserved. Development of a Modelling to Correlate Site and Diameter of Brain Metastases with Hippocampal Sparing Using Volumetric Modulated Arc Therapy Wed, 09 Oct 2013 16:51:31 +0000 http://www.hindawi.com/journals/bmri/2013/568597/ Purpose. To correlate site and diameter of brain metastases with hippocampal sparing in patients treated by RapidArc (RA) technique on whole brain with simultaneously integrated boost (SIB). Methods and Materials. An RA plan was calculated for brain metastases of 1-2-3 cm of diameter. The whole brain dose was 32.25 Gy (15 fractions), and SIB doses to brain metastases were 63 Gy (2 and 3 cm) or 70.8 Gy (1 cm). Plans were optimized and evaluated for conformity, target coverage, prescription isodose to target volume, homogeneity index, and hippocampal sparing. Results. Fifteen brain lesions and RA plan were generated. Hippocampal volume was 4.09 cm3, and hippocampal avoidance volume was 17.50 cm3. Related to site of metastases, the mean hippocampal dose was 9.68 Gy2 for occipital lobe, 10.56 Gy2 for frontal lobe, 10.56 Gy2 for parietal lobe, 10.94 Gy2 for deep brain structures, and 40.44 Gy2 for temporal lobe. The mean hippocampal dose was 9.45 Gy2, 10.15 Gy2, and 11.70 Gy2 for diameter’s metastases of 1.2 and 3 cm, respectively, excluding results relative to temporal brain lesions. Conclusions. Location more than size of metastases can adversely influence the hippocampus sparing. Further investigation is necessary to meet definitive considerations. Silvia Chiesa, Mario Balducci, Luigi Azario, Simona Gaudino, Francesco Cellini, Gian Carlo Mattiucci, Cesare Colosimo, and Vincenzo Valentini Copyright © 2013 Silvia Chiesa et al. All rights reserved. Prognostic Value of Combined Aquaporin 3 and Aquaporin 5 Overexpression in Hepatocellular Carcinoma Wed, 09 Oct 2013 14:51:33 +0000 http://www.hindawi.com/journals/bmri/2013/206525/ Background. Aquaporin (AQP) 3 and AQP 5 are involved in tumorigenesis and tumor progression of several tumor types. Aim. To investigate expression patterns and clinical significance of AQP3 and AQP5 in hepatocellular carcinoma (HCC). Methods. Immunohistochemistry was performed to detect the expression of AQP3 and AQP5 in HCC tissues. Results. Immunohistochemistry analysis showed the increased expression of AQP3 and AQP5 protein levels in HCC tissues compared with their adjacent nonneoplastic tissues (both ). In addition, combined AQP3 and AQP5 protein expression was significantly associated with serum AFP (), tumor stage (), and tumor grade (). Moreover, HCC patients highly expressing both AQP3 and AQP5 proteins had worse 5-year disease-free survival and 5-year overall survival ( and 0.005, resp.). Furthermore, the Cox proportional hazards model showed that combined AQP3 and AQP5 protein expression was an independent poor prognostic factor for both 5-year disease-free survival () and 5-year overall survival () in HCC. Conclusion. Our data suggest for the first time that the aberrant expression of AQP3 and AQP5 proteins may be strongly related to tumor progression and prognosis in patients with HCC. The overexpression of AQP3 in combination with upregulation of AQP5 may be an unfavorable prognostic factor for HCC. Xiaodong Guo, Ting Sun, Mei Yang, Zhiyan Li, Zhiwei Li, and Yuejuan Gao Copyright © 2013 Xiaodong Guo et al. All rights reserved. Evaluation of Wall Correction Factor of INER's Air-Kerma Primary Standard Chamber and Dose Variation by Source Displacement for HDR 192Ir Brachytherapy Tue, 08 Oct 2013 14:37:53 +0000 http://www.hindawi.com/journals/bmri/2013/436979/ The aim of the present study was to estimate the wall effect of the self-made spherical graphite-walled cavity chamber with the Monte Carlo method for establishing the air-kerma primary standard of high-dose-rate (HDR) 192Ir brachytherapy sources at the Institute of Nuclear Energy Research (INER, Taiwan). The Monte Carlo method established in this paper was also employed to respectively simulate wall correction factors of the 192Ir air-kerma standard chambers used at the National Institute of Standards and Technology (NIST, USA) and the National Physical Laboratory (NPL, UK) for comparisons and verification. The chamber wall correction calculation results will be incorporated into INER's HDR 192Ir primary standard in the future. For the brachytherapy treatment in the esophagus or in the bronchi, the position of the isotope may have displacement in the cavity. Thus the delivered dose would differ from the prescribed dose in the treatment plan. We also tried assessing dose distribution due to the position displacement of HDR 192Ir brachytherapy source in a phantom with a central cavity by the Monte Carlo method. The calculated results could offer a clinical reference for the brachytherapy within the human organs with cavity. J. H. Lee, J. N. Wang, T. T. Huang, S. H. Su, B. J. Chang, C. H. Su, and S. M. Hsu Copyright © 2013 J. H. Lee et al. All rights reserved. Higher Incidence of Lung Adenocarcinomas Induced by DMBA in Connexin 43 Heterozygous Knockout Mice Thu, 03 Oct 2013 17:29:16 +0000 http://www.hindawi.com/journals/bmri/2013/618475/ Gap junctions are communicating junctions which are important for tissue homeostasis, and their disruption is involved in carcinogenic processes. This study aimed to verify the influence of deletion of one allele of the Connexin 43 gene on cancer incidence in different organs. The 7, 12-dimethylbenzanthracene (DMBA) carcinogenic model, using hebdomadary doses by gavage of 9 mg per animal, was used to induce tumors in Connexin 43 heterozygous or wild-type mice. The experiment began in the eighth week of the mice life, and all of them were euthanized when reaching inadequate physical condition, or at the end of 53 weeks. No statistical differences occurred for weight gain and cancer survival time () between heterozygous and wild-type mice. Cx43+/− mice presented significantly higher susceptibility to lung cancer () which was not evidenced for benign neoplasms (). In addition, incidence of ovarian neoplasms was 2.5-fold higher in Cx43+/− mice, although not statistically significant. Other organs showed a very similar cancer occurrence between Cx43 groups. The experiment strengthens the evidence of the relationship between Connexin 43 deficiency and carcinogenesis. Krishna Duro de Oliveira, Marcello Vannucci Tedardi, Bruno Cogliati, and Maria Lúcia Zaidan Dagli Copyright © 2013 Krishna Duro de Oliveira et al. All rights reserved. Endothelial Gene Expression and Molecular Changes in Response to Radiosurgery in In Vitro and In Vivo Models of Cerebral Arteriovenous Malformations Wed, 02 Oct 2013 08:50:23 +0000 http://www.hindawi.com/journals/bmri/2013/408253/ Radiosurgery for cerebral arteriovenous malformations (AVMs) is limited to 2-year latency. There is no early marker to monitor whether the lesion is responsive to radiosurgery. In this study, we examined endothelial gene expression and molecular changes in response to radiosurgery. Gene expression of E- and P-selectin, ICAM-1, PECAM-1, VCAM-1, tissue factor, and vWF in human cerebral microvascular endothelial cells was quantified by RT-qPCR at different radiation doses and time points. Soluble E- and P-selectin, ICAM-1, VCAM-1, and tissue factor in an animal model of AVMs were quantified by ELISA at different time after radiosurgery. We found that gene expression of E- and P-selectin, ICAM-1, PECAM-1, and VCAM-1 was upregulated by radiation in a dose-dependent manner (). Gene expression of E- and P-selectin and ICAM-1 was more sensitive to irradiation than that of PECAM-1 and VCAM-1. Radiosurgery induced gene expression of P-selectin, ICAM-1, PECAM-1, and VCAM-1 was linearly correlated with time (). Radiosurgery induced elevation of soluble E- and P-selectin, ICAM-1, VCAM-1, and tissue factor in a rat model of AVMs (). Thus, a combination of these molecules measured at different time points may serve as an early predictor of responsiveness of AVMs to radiosurgery. Jian Tu, Zhiqiang Hu, and Zhongbin Chen Copyright © 2013 Jian Tu et al. All rights reserved. Role of STAT3 in Cancer Metastasis and Translational Advances Wed, 02 Oct 2013 08:36:54 +0000 http://www.hindawi.com/journals/bmri/2013/421821/ Signal transducer and activator of transcription 3 (STAT3) is a latent cytoplasmic transcription factor, originally discovered as a transducer of signal from cell surface receptors to the nucleus. It is activated by tyrosine phosphorylation at position 705 leading to its dimerization, nuclear translocation, DNA binding, and activation of gene transcription. Under normal physiological conditions, STAT3 activation is tightly regulated. However, compelling evidence suggests that STAT3 is constitutively activated in many cancers and plays a pivotal role in tumor growth and metastasis. It regulates cellular proliferation, invasion, migration, and angiogenesis that are critical for cancer metastasis. In this paper, we first describe the mechanism of STAT3 regulation followed by how STAT3 is involved in cancer metastasis, then we summarize the various small molecule inhibitors that inhibit STAT3 signaling. Mohammad Zahid Kamran, Prachi Patil, and Rajiv P. Gude Copyright © 2013 Mohammad Zahid Kamran et al. All rights reserved. Immune Monitoring in Cancer Vaccine Clinical Trials: Critical Issues of Functional Flow Cytometry-Based Assays Mon, 30 Sep 2013 14:34:57 +0000 http://www.hindawi.com/journals/bmri/2013/726239/ The development of immune monitoring assays is essential to determine the immune responses against tumor-specific antigens (TSAs) and tumor-associated antigens (TAAs) and their possible correlation with clinical outcome in cancer patients receiving immunotherapies. Despite the wide range of techniques used, to date these assays have not shown consistent results among clinical trials and failed to define surrogate markers of clinical efficacy to antitumor vaccines. Multiparameter flow cytometry- (FCM-) based assays combining different phenotypic and functional markers have been developed in the past decade for informative and longitudinal analysis of polyfunctional T-cells. These technologies were designed to address the complexity and functional heterogeneity of cancer biology and cellular immunity and to define biomarkers predicting clinical response to anticancer treatment. So far, there is still a lack of standardization of some of these immunological tests. The aim of this review is to overview the latest technologies for immune monitoring and to highlight critical steps involved in some of the FCM-based cellular immune assays. In particular, our laboratory is focused on melanoma vaccine research and thus our main goal was the validation of a functional multiparameter test (FMT) combining different functional and lineage markers to be applied in clinical trials involving patients with melanoma. Iole Macchia, Francesca Urbani, and Enrico Proietti Copyright © 2013 Iole Macchia et al. All rights reserved. Stat3 Inhibits PTPN13 Expression in Squamous Cell Lung Carcinoma through Recruitment of HDAC5 Thu, 26 Sep 2013 15:27:38 +0000 http://www.hindawi.com/journals/bmri/2013/468963/ Proteins of the protein tyrosine phosphatase (PTP) family are known to be signaling molecules that regulate a variety of cellular processes including cell growth, differentiation, and apoptosis. PTPN13 (also known as FAP1, PTPL1, PTPLE, PTPBAS, and PTP1E), a putative tumor suppressor, is frequently inactivated in lung carcinoma through the loss of either mRNA or protein expression. However, the molecular mechanisms underlying its dysregulation have not been fully explored. Interleukin-6 (IL-6) mediated Stat3 activation is viewed as crucial for multiple tumor growth and progression. Here, we demonstrate that PTPN13 is a direct transcriptional target of Stat3 in the squamous cell lung carcinoma. Our data show that IL-6 administration or transfection of a constitutively activated Stat3 in HCC-1588 and SK-MES-1 cells inhibits PTPN13 mRNA transcription. Using luciferase reporter and ChIP assays, we show that Stat3 binds to the promoter region of PTPN13 and promotes its activity through recruiting HDAC5. Thus, our results suggest a previously unknown Stat3-PTPN13 molecular network controlling squamous cell lung carcinoma development. Xiu-juan Han, Li Xue, Li Gong, Shao-jun Zhu, Li Yao, Shu-mei Wang, Miao Lan, Wei Zhang, and Yan-hong Li Copyright © 2013 Xiu-juan Han et al. All rights reserved. Helical Irradiation of the Total Skin with Dose Painting to Replace Total Skin Electron Beam Therapy for Therapy-Refractory Cutaneous CD4+ T-Cell Lymphoma Mon, 23 Sep 2013 14:46:48 +0000 http://www.hindawi.com/journals/bmri/2013/717589/ A 36-year-old woman was diagnosed with a therapy-refractory cutaneous CD4+ T-cell lymphoma, T3N0M0B0, and stage IIB. Helical irradiation of the total skin (HITS) and dose painting techniques, with 30 Gy in 40 fractions interrupted at 20 fractions with one week resting, 4 times per week were prescribed. The diving suit was dressed whole body to increase the superficial dose and using central core complete block (CCCB) technique for reducing the internal organ dose. The mean doses of critical organs of head, chest, and abdomen were 2.1 to 29.9 Gy, 2.9 to 8.1 Gy, and 3.6 to 15.7 Gy, respectively. The mean dose of lesions was 84.0 cGy. The dosage of left side pretreated area was decreased 57%. The tumor regressed progressively without further noduloplaques. During the HITS procedure, most toxicity was grade I except leukocytopenia with grade 3. No epitheliolysis, phlyctenules, tumor lysis syndrome, fever, vomiting, dyspnea, edema of the extremities, or diarrhea occurred during the treatment. HITS with dose painting techniques provides precise dosage delivery with impressive results, sparing critical organs, and offering limited transient and chronic sequelae for previously locally irradiated, therapy-refractory cutaneous T-cell lymphoma. Chen-Hsi Hsieh, Pei-Wei Shueng, Shih-Chiang Lin, Hui-Ju Tien, An-Cheng Shiau, Yueh-Hung Chou, Meng-Hao Wu, Jen-Yu Wang, Chi-Kuan Chen, and Yu-Jen Chen Copyright © 2013 Chen-Hsi Hsieh et al. All rights reserved. Stage-Stratified Analysis of Prognostic Significance of Bax-Interacting Factor-1 Expression in Resected Colorectal Cancer Mon, 23 Sep 2013 13:46:13 +0000 http://www.hindawi.com/journals/bmri/2013/329839/ Background/Aim. Bax-interacting factor-1 (Bif-1) plays a crucial role in apoptosis and autophagy. The aim of this study was to evaluate Bif-1 protein expression and its prognostic significance in colorectal cancer (CRC). Methods. We analyzed Bif-1 protein expression in 251 resected specimens from patients with CRC by immunohistochemistry using tissue microarray. Results. Low Bif-1 expression was observed in 131 patients (52.2%) and high Bif-1 expression in 120 patients (47.8%). No significant differences were observed in clinicopathological parameters between patients with high and low Bif-1 expression. Kaplan-Meier survival analysis showed no difference in survival between patients with high and low Bif-1 expression. Stratified analysis of Bif-1 according to TNM stage demonstrated that low Bif-1 expression was significantly associated with a poor outcome in patients with stages I and II (). Stratified multivariate analysis demonstrated that low Bif-1 expression was an independent indicator of poor prognosis (hazard ratio, 0.459; 95% confidence interval, 0.285–0.739; ). Conclusion. Patients with low levels of Bif-1 expression have shortened survival rates in CRC of stages I and II. This suggests that Bif-1 protein expression may be a useful prognostic marker in early-stage CRC. Yoon Ho Ko, Young-Seok Cho, Hye Sung Won, Ho Jung An, Der Sheng Sun, Soon Uk Hong, Jin Hee Park, and Myung Ah Lee Copyright © 2013 Yoon Ho Ko et al. All rights reserved. Hypoxia and Human Genome Stability: Downregulation of BRCA2 Expression in Breast Cancer Cell Lines Sun, 22 Sep 2013 10:39:39 +0000 http://www.hindawi.com/journals/bmri/2013/746858/ Previously, it has been reported that hypoxia causes increased mutagenesis and alteration in DNA repair mechanisms. In 2005, an interesting study showed that hypoxia-induced decreases in BRCA1 expression and the consequent suppression of homologous recombination may lead to genetic instability. However, nothing is yet known about the involvement of BRCA2 in hypoxic conditions in breast cancer. Initially, a cell proliferation assay allowed us to hypothesize that hypoxia could negatively regulate the breast cancer cell growth in short term in vitro studies. Subsequently, we analyzed gene expression in breast cancer cell lines exposed to hypoxic condition by microarray analysis. Interestingly, genes involved in DNA damage repair pathways such as mismatch repair, nucleotide excision repair, nonhomologous end-joining and homologous recombination repair were downregulated. In particular, we focused on the BRCA2 downregulation which was confirmed at mRNA and protein level. In addition, breast cancer cells were treated with dimethyloxalylglycine (DMOG), a cell-permeable inhibitor of both proline and asparaginyl hydroxylases able to induce HIF-1α stabilization in normoxia, providing results comparable to those previously described. These findings may provide new insights into the mechanisms underlying genetic instability mediated by hypoxia and BRCA involvement in sporadic breast cancers. Daniele Fanale, Viviana Bazan, Stefano Caruso, Marta Castiglia, Giuseppe Bronte, Christian Rolfo, Giuseppe Cicero, and Antonio Russo Copyright © 2013 Daniele Fanale et al. All rights reserved. Efficacy and Safety of Docetaxel Plus Oxaliplatin and Capecitabine in the First Line Treatment of Advanced Gastric Adenocarcinoma Sun, 15 Sep 2013 13:35:40 +0000 http://www.hindawi.com/journals/bmri/2013/971096/ Objective. To evaluate the efficacy and safety of docetaxel plus oxaliplatin and capecitabine (DOX) in the first line treatment of advanced gastric adenocarcinoma. Methods. A total of 37 patients were enrolled into this study, and they received DOX regimen (docetaxel 75 mg/m2 and oxaliplatin 130 mg/m2 intravenous infusion on day 1, and capecitabine 1000 mg/m2 orally twice daily on d1–14); treatment was repeated every 3 weeks. Results. All 37 patients were assessable for evaluation. The numbers of patients with complete response (CR), partial responses (PR), stable disease (SD), and progressive disease (PD) were 1, 10, 23, and 3, respectively. The objective response rate (ORR) was 29.7%, with the disease control rate (DCR) of 91.9%. Median progression-free survival (mPFS) and overall survival (mOS) were 197 days and 364 days, respectively. The most common grade 3/4 toxicities were hematological toxicities. The most common grade 3/4 nonhematological toxicities were fatigue, nausea, vomiting, anorexia, diarrhea, and hand-foot syndrome. Conclusion. The DOX regimen demonstrated a promising efficacy as the first line regimen in treating advanced gastric cancer patients with good performance status, the toxicities were tolerated and controllable. Large-scale clinical observation is necessary to get further evidence. Ying Liu, Zhengbao Ye, Wenqi Xi, Tao Ma, Min Shi, Liu Yang, Zhenggang Zhu, and Jun Zhang Copyright © 2013 Ying Liu et al. All rights reserved. Heart Rate Variability Is Associated with Survival in Patients with Brain Metastasis: A Preliminary Report Thu, 12 Sep 2013 13:33:05 +0000 http://www.hindawi.com/journals/bmri/2013/503421/ Impaired heart rate variability (HRV) has been demonstrated as a negative survival prognosticator in various diseases. We conducted this prospective study to evaluate how HRV affects brain metastasis (BM) patients. Fifty-one BM patients who had not undergone previous brain operation or radiotherapy (RT) were recruited from January 2010 to July 2012, and 40 patients were included in the final analysis. A 5-minute electrocardiogram was obtained before whole brain radiotherapy. Time domain indices of HRV were compared with other clinical factors on overall survival (OS). In the univariate analysis, Karnofsky performance status (KPS) <70 () and standard deviation of the normal-to-normal interval (SDNN) <10 ms () significantly predict poor survival. The multivariate analysis revealed that KPS <70 and SDNN <10 ms were independent negative prognosticators for survival in BM patients with hazard ratios of 2.657 and 2.204, respectively. In conclusion, HRV is associated with survival and may be a novel prognostic factor for BM patients. Yu-Ming Wang, Hau-Tieng Wu, Eng-Yen Huang, Yu Ru Kou, and Shu-Shya Hseu Copyright © 2013 Yu-Ming Wang et al. All rights reserved. The Human Cell Surfaceome of Breast Tumors Mon, 09 Sep 2013 19:05:42 +0000 http://www.hindawi.com/journals/bmri/2013/976816/ Introduction. Cell surface proteins are ideal targets for cancer therapy and diagnosis. We have identified a set of more than 3700 genes that code for transmembrane proteins believed to be at human cell surface. Methods. We used a high-throuput qPCR system for the analysis of 573 cell surface protein-coding genes in 12 primary breast tumors, 8 breast cell lines, and 21 normal human tissues including breast. To better understand the role of these genes in breast tumors, we used a series of bioinformatics strategies to integrates different type, of the datasets, such as KEGG, protein-protein interaction databases, ONCOMINE, and data from, literature. Results. We found that at least 77 genes are overexpressed in breast primary tumors while at least 2 of them have also a restricted expression pattern in normal tissues. We found common signaling pathways that may be regulated in breast tumors through the overexpression of these cell surface protein-coding genes. Furthermore, a comparison was made between the genes found in this report and other genes associated with features clinically relevant for breast tumorigenesis. Conclusions. The expression profiling generated in this study, together with an integrative bioinformatics analysis, allowed us to identify putative targets for breast tumors. Júlia Pinheiro Chagas da Cunha, Pedro Alexandre Favoretto Galante, Jorge Estefano Santana de Souza, Martin Pieprzyk, Dirce Maria Carraro, Lloyd J. Old, Anamaria Aranha Camargo, and Sandro José de Souza Copyright © 2013 Júlia Pinheiro Chagas da Cunha et al. All rights reserved. Total Marrow Irradiation as Part of Autologous Stem Cell Transplantation for Asian Patients with Multiple Myeloma Sun, 08 Sep 2013 11:17:28 +0000 http://www.hindawi.com/journals/bmri/2013/321762/ To compare the outcomes of melphalan 200 mg/m2 (HDM200) and 8 Gy total marrow irradiation (TMI) delivered by helical tomotherapy plus melphalan 140 mg/m2 (HDM140 + TMI 8 Gy) in newly diagnosed symptomatic multiple myeloma (MM) Asian patients. Between 2007 and 2010, nine consecutive myeloma patients who were scheduled to undergo autologous stem cell transplantation (ASCT) were studied. The patients received three cycles of vincristine-adriamycin-dexamethasone (VAD) regimen as induction chemotherapy, and if they had a partial response, peripheral blood stem cells were collected by dexamethasone-etoposide-cyclophosphamide-cisplatin (DECP). In arm A, six patients received the HDM200. In arm B, three patients received HDM140 + TMI 8 Gy. In arm B, the neutropenic duration was slightly longer than in arm A (). However, hematologic recovery (except for neutrophils), transfusion requirement, median duration of hospitalization, and the dose of G-CSF were similar in both arms. The median duration of overall survival and event-free survival was similar in the two arms (). As a conditioning regiment, HDM140 + TMI 8 Gy provide another chance for MM Asian patients who were not feasible for HDM200. Shih-Chiang Lin, Pei-Ying Hsieh, Pei-Wei Shueng, Hui-Ju Tien, Li-Ying Wang, and Chen-Hsi Hsieh Copyright © 2013 Shih-Chiang Lin et al. All rights reserved. Electrical Impedance Spectroscopy as Electrical Biopsy for Monitoring Radiation Sequelae of Intestine in Rats Wed, 04 Sep 2013 15:07:46 +0000 http://www.hindawi.com/journals/bmri/2013/974614/ Electrical impedance is one of the most frequently used parameters for characterizing material properties. The resistive and capacitive characteristics of tissue may be revealed by electrical impedance spectroscopy (EIS) as electrical biopsy. This technique could be used to monitor the sequelae after irradiation. In this study, rat intestinal tissues after irradiation were assessed by EIS system based on commercially available integrated circuits. The EIS results were fitted to a resistor-capacitor circuit model to determine the electrical properties of the tissue. The variations in the electrical characteristics of the tissue were compared to radiation injury score (RIS) by morphological and histological findings. The electrical properties, based on receiver operation curve (ROC) analysis, strongly reflected the histological changes with excellent diagnosis performance. The results of this study suggest that electrical biopsy reflects histological changes after irradiation. This approach may significantly augment the evaluation of tissue after irradiation. It could provide rapid results for decision making in monitoring radiation sequelae prospectively. Pei-Ju Chao, Eng-Yen Huang, Kuo-Sheng Cheng, and Yu-Jie Huang Copyright © 2013 Pei-Ju Chao et al. All rights reserved. Control of Respiratory Motion by Hypnosis Intervention during Radiotherapy of Lung Cancer I Wed, 04 Sep 2013 10:53:14 +0000 http://www.hindawi.com/journals/bmri/2013/574934/ The uncertain position of lung tumor during radiotherapy compromises the treatment effect. To effectively control respiratory motion during radiotherapy of lung cancer without any side effects, a novel control scheme, hypnosis, has been introduced in lung cancer treatment. In order to verify the suggested method, six volunteers were selected with a wide range of distribution of age, weight, and chest circumference. A set of experiments have been conducted for each volunteer, under the guidance of the professional hypnotist. All the experiments were repeated in the same environmental condition. The amplitude of respiration has been recorded under the normal state and hypnosis, respectively. Experimental results show that the respiration motion of volunteers in hypnosis has smaller and more stable amplitudes than in normal state. That implies that the hypnosis intervention can be an alternative way for respiratory control, which can effectively reduce the respiratory amplitude and increase the stability of respiratory cycle. The proposed method will find useful application in image-guided radiotherapy. Rongmao Li, Jie Deng, and Yaoqin Xie Copyright © 2013 Rongmao Li et al. All rights reserved. Helical Tomotherapy for Inoperable Breast Cancer: A New Promising Tool Mon, 02 Sep 2013 15:39:55 +0000 http://www.hindawi.com/journals/bmri/2013/264306/ Background. We investigated the feasibility of helical tomotherapy (HT) for inoperable large breast tumors, after failing to achieve adequate treatment planning with conformal radiation techniques. Material and Methods. Five consecutive patients with locally advanced breast cancer (LABC) were treated by preoperative HT. All patients received up-front chemotherapy before HT. Irradiated volumes included breast and nodal areas (45–50 Gy) in 4 patients. One patient received a simultaneous integrated boost (55 Gy) to gross tumor volume (GTV) without lymph node irradiation. Acute toxicity was assessed with Common Toxicity Criteria for Adverse Events v.4. Patients were evaluated for surgery at the end of treatment. Results. Patients were staged IIB to IIIC (according to the AJCC staging system 2010). HT was associated in 4 patients with concomitant chemotherapy (5-fluorouracil and vinorelbine). Two patients were scored with grade 3 skin toxicity (had not completed HT) and one with grade 3 febrile neutropenia. One patient stopped HT with grade 2 skin toxicity. All patients were able to undergo mastectomy at a median interval of 43 days (31–52) from HT. Pathological partial response was seen in all patients. Conclusions. HT is feasible with acceptable toxicity profiles, potentially increased by chemotherapy. These preliminary results prompt us to consider a phase II study. Ciprian Chira, Youlia M. Kirova, Xavier Liem, François Campana, Dominique Peurien, Malika Amessis, Nathalie Fournier-Bidoz, Jean-Yves Pierga, Rémi Dendale, Pierre Bey, and Alain Fourquet Copyright © 2013 Ciprian Chira et al. All rights reserved. Digital Microscopy Assessment of Angiogenesis in Different Breast Cancer Compartments Sun, 01 Sep 2013 14:02:52 +0000 http://www.hindawi.com/journals/bmri/2013/286902/ Background/Aim. Tumour angiogenesis defined by microvessel density (MVD) is generally accepted as a prognostic factor in breast cancer. However, due to variability of measurement systems and cutoffs, it is questionable to date whether it contributes to predictive outline. Our study aims to grade vascular heterogeneity by comparing clear-cut compartments: tumour associated stroma (TAS), tumour parenchyma, and tumour invasive front. Material and Methods. Computerized vessel area measurement was performed using a tissue cytometry system (TissueFAXS) on slides originated from 50 patients with breast cancer. Vessels were marked using immunohistochemistry with CD34. Regions of interest were manually defined for each tumour compartment. Results. Tumour invasive front vascular endothelia area was 2.15 times higher than that in tumour parenchyma and 4.61 times higher than that in TAS (). Worth to mention that the lymph node negative subgroup of patients show a slight but constant increase of vessel index in all examined compartments of breast tumour. Conclusion. Whole slide digital examination and region of interest (ROI) analysis are a valuable tool in scoring angiogenesis markers and disclosing their prognostic capacity. Our study reveals compartments’ variability of vessel density inside the tumour and highlights the propensity of invasive front to associate an active process of angiogenesis with potential implications in adjuvant therapy. Anca Haisan, Radu Rogojanu, Camelia Croitoru, Daniela Jitaru, Cristina Tarniceriu, Mihai Danciu, and Eugen Carasevici Copyright © 2013 Anca Haisan et al. All rights reserved. A Review on the Use of Grid-Based Boltzmann Equation Solvers for Dose Calculation in External Photon Beam Treatment Planning Tue, 27 Aug 2013 13:27:03 +0000 http://www.hindawi.com/journals/bmri/2013/692874/ Deterministic linear Boltzmann transport equation (D-LBTE) solvers have recently been developed, and one of the latest available software codes, Acuros XB, has been implemented in a commercial treatment planning system for radiotherapy photon beam dose calculation. One of the major limitations of most commercially available model-based algorithms for photon dose calculation is the ability to account for the effect of electron transport. This induces some errors in patient dose calculations, especially near heterogeneous interfaces between low and high density media such as tissue/lung interfaces. D-LBTE solvers have a high potential of producing accurate dose distributions in and near heterogeneous media in the human body. Extensive previous investigations have proved that D-LBTE solvers were able to produce comparable dose calculation accuracy as Monte Carlo methods with a reasonable speed good enough for clinical use. The current paper reviews the dosimetric evaluations of D-LBTE solvers for external beam photon radiotherapy. This content summarizes and discusses dosimetric validations for D-LBTE solvers in both homogeneous and heterogeneous media under different circumstances and also the clinical impact on various diseases due to the conversion of dose calculation from a conventional convolution/superposition algorithm to a recently released D-LBTE solver. Monica W. K. Kan, Peter K. N. Yu, and Lucullus H. T. Leung Copyright © 2013 Monica W. K. Kan et al. All rights reserved. New Hypothesis on Pathogenesis of Ovarian Cancer Lead to Future Tailored Approaches Sun, 25 Aug 2013 13:40:11 +0000 http://www.hindawi.com/journals/bmri/2013/852839/ In the last decades, management of epithelial ovarian cancer (EOC) has been based on the staging system of the International Federation of Gynecology and Obstetrics (FIGO), and different classifications have been proposed for EOC that take account of grade of differentiation, histological subtype, and clinical features. However, despite taxonomic efforts, EOC appears to be not a unique disease; its subtypes differ for epidemiological and genetic risk factors, precursor lesions, patterns of spread, response to chemotherapy, and prognosis. Nevertheless, carboplatin plus paclitaxel combination represents the only standard treatment in adjuvant and advanced settings. This paper summarizes theories about the classification and origin of EOC and classical and new prognostic factors. It presents data about standard treatment and novel agents. We speculate about the possibility to create tailored therapy based on specific mutations in ovarian cancer and to personalize prevention. P. Rescigno, I. Cerillo, R. Ruocco, C. Condello, S. De Placido, and M. Pensabene Copyright © 2013 P. Rescigno et al. All rights reserved. Interferon-α Enhances 5′-Deoxy-5-Fluorouridine-Induced Apoptosis by ERK-Dependant Upregulation of Thymidine Phosphorylase Tue, 20 Aug 2013 12:33:25 +0000 http://www.hindawi.com/journals/bmri/2013/132793/ 5-Florouracil (5-FU) is the basic agent used in the treatment of gastric cancer. Capecitabine, a prodrug of 5-FU, displays increased antitumor efficacy compared with 5-FU in the clinic. -Deoxy-5-fluorouracil (-DFUR), the metabolite of capecitabine, is converted to 5-FU by the enzyme thymidine phosphorylase (TP), which is present at high concentrations in human tumors. In this study, we investigated the effect of interferon-α (IFN-α) on the sensitivity of gastric cancer cells to treatment with -DFUR and its relationship with TP expression. Preincubation of gastric cancer cells with IFN-α enhanced -DFUR-induced apoptosis via IFN-α-mediated upregulation of TP. The depletion of TP with small interfering RNA (siRNA) obviously inhibited IFN-α-induced upregulation of TP expression and thus prevented apoptosis induced by IFN-α and -DFUR. Treatment with IFN-α and combined IFN-α and -DFUR treatment were also associated with concomitant activation of ERK signaling. Treatment with the ERK inhibitor PD98059 or depletion of ERK with siRNA partially reversed IFN-α-induced upregulation of TP expression, thus partially preventing apoptosis induced by IFN-α and -DFUR. Taken together, our study shows that IFN-α enhanced -DFUR-induced apoptosis in gastric cancer cells by upregulation of TP expression, which is partially regulated by activation of ERK signaling. Yike Zhu, Ling Xu, Yibo Fan, Ce Li, Ye Zhang, Huachuan Zheng, Kezuo Hou, Xiujuan Qu, and Yunpeng Liu Copyright © 2013 Yike Zhu et al. All rights reserved. Clinicopathological Impact of ABCC1/MRP1 and ABCC4/MRP4 in Epithelial Ovarian Carcinoma Mon, 19 Aug 2013 10:04:38 +0000 http://www.hindawi.com/journals/bmri/2013/143202/ Ovarian cancer is the main cause of death from gynaecological malignancies. In spite of the efficacy of platinum-paclitaxel treatment in patients with primary epithelial ovarian carcinoma, platinum-based chemotherapy is not curative and resistance remains one of the most important causes of treatment failure. Although ABC transporters have been implicated in cellular resistance to multiple drugs, the clinical relevance of these efflux pumps is still poorly understood. Thus, we examined the prognostic role of transporters of the MRP family (i.e., ABCC1/MRP1, ABCC4/MRP4) to gain insights into their clinical impacts. A case material of 127 patients with ovarian carcinoma at different stages and histotypes was used. The expression of MRP1 and MRP4 was examined by immunohistochemistry using tissue microarrays in tumor specimens collected at the time of initial surgery expression. We found an association between MRP1 expression and grading, and we observed that MRP4 displayed an unfavourable impact on disease relapse in multivariate analysis (HR = 2.05, 95% CI: 1.01–4.11; ). These results suggest that in epithelial ovarian cancer, MRP1 may be a marker for aggressiveness because its expression was associated with tumor grade and support that MRP4 may play an unfavourable role in disease outcome. Marina Bagnoli, Giovanni L. Beretta, Laura Gatti, Silvana Pilotti, Paola Alberti, Eva Tarantino, Mattia Barbareschi, Silvana Canevari, Delia Mezzanzanica, and Paola Perego Copyright © 2013 Marina Bagnoli et al. All rights reserved. Emerging Metabolic Targets in the Therapy of Hematological Malignancies Sun, 18 Aug 2013 08:59:35 +0000 http://www.hindawi.com/journals/bmri/2013/946206/ During the last decade, the development of anticancer therapies has focused on targeting neoplastic-related metabolism. Cancer cells display a variety of changes in their metabolism, which enable them to satisfy the high bioenergetic and biosynthetic demands for rapid cell division. One of the crucial alterations is referred to as the “Warburg effect”, which involves a metabolic shift from oxidative phosphorylation towards the less efficient glycolysis, independent of the presence of oxygen. Although there are many examples of solid tumors having altered metabolism with high rates of glucose uptake and glycolysis, it was only recently reported that this phenomenon occurs in hematological malignancies. This review presents evidence that targeting the glycolytic pathway at different levels in hematological malignancies can inhibit cancer cell proliferation by restoring normal metabolic conditions. However, to achieve cancer regression, high concentrations of glycolytic inhibitors are used due to limited solubility and biodistribution, which may result in toxicity. Besides using these inhibitors as monotherapies, combinatorial approaches using standard chemotherapeutic agents could display enhanced efficacy at eradicating malignant cells. The identification of the metabolic enzymes critical for hematological cancer cell proliferation and survival appears to be an interesting new approach for the targeted therapy of hematological malignancies. Zaira Leni, Geetha Parakkal, and Alexandre Arcaro Copyright © 2013 Zaira Leni et al. All rights reserved. Low-Dose-Area-Constrained Helical TomoTherapy-Based Whole Breast Radiotherapy and Dosimetric Comparison with Tangential Field-in-Field IMRT Wed, 14 Aug 2013 11:02:34 +0000 http://www.hindawi.com/journals/bmri/2013/513708/ Background and Purpose. To present a novel helical TomoTherapy-based method for whole breast radiotherapy that has better dosimetry and also has acceptable low-dose regions for lungs, heart, and contralateral breast compared with tangential field-in-field IMRT (FIF-IMRT). Material and Methods. Ten patients with left-side breast cancer were planned with low-dose-area-constrained helical TomoTherapy (LDC-HT) and FIF-IMRT. Dosimetry was compared for all techniques. Results. Coverage of the whole breast was adequate with both techniques. Homogeneity index (HI) and conformity index (CI) were better with LDC-HT. LDC-HT showed dosimetry advantages over FIF-IMRT for ipsilateral lung and heart in not only high-dose levels but also in low-dose levels such as and . For contralateral lung, both techniques can provide good protection, although the mean dose of LDC-HT is higher than that of FIF-IMRT. Conclusions. With LDC-HT, we obtained adequate target coverage, better HI and CI of target volume, better sparing of organs at risk, and acceptably low-dose areas compared with FIF-IMRT. LDC-HT could be a feasible method in whole breast radiotherapy. Clinical benefits of LDC-HT need further investigation. Jie Qiu, Zhikai Liu, Bo Yang, Xiaorong Hou, and Fuquan Zhang Copyright © 2013 Jie Qiu et al. All rights reserved. Stereotactic Body Radiotherapy as an Alternative to Brachytherapy in Gynecologic Cancer Tue, 13 Aug 2013 11:56:10 +0000 http://www.hindawi.com/journals/bmri/2013/898953/ Introduction. Brachytherapy plays a key role in the treatment of many gynecologic cancers. However, some patients are unable to tolerate brachytherapy for medical or other reasons. For these patients, stereotactic body radiotherapy (SBRT) offers an alternative form of treatment. Methods. Retrospective review of patients prospectively collected on SBRT database is conducted. A total of 11 gynecologic patients who could not have brachytherapy received SBRT for treatment of their malignancies. Five patients have been candidates for interstitial brachytherapy, and six have required tandem and ovoid brachytherapy. Median SBRT dose was 25 Gy in five fractions. Results. At last followup, eight patients were alive, and three patients had died of progressive disease. One patient had a local recurrence. Median followup for surviving patients was 420 days (median followup for all patients was 120 days). Two patients had acute toxicity (G2 dysuria and G2 GI), and one patient had late toxicity (G3 GI, rectal bleeding requiring cauterization). Conclusions. Our data show acceptable toxicity and outcome for gynecologic patients treated with SBRT who were unable to receive a brachytherapy boost. This treatment modality should be further evaluated in a phase II study. Gregory J. Kubicek, Jinyu Xue, Qianyi Xu, Sucha O. Asbell, Leslie Hughes, Noel Kramer, Ashraf Youssef, Yan Chen, James Aikens, Howard Saul, Niraj Pahlajani, and Tamara LaCouture Copyright © 2013 Gregory J. Kubicek et al. All rights reserved. Long-Term Nitric Oxide Exposure Enhances Lung Cancer Cell Migration Wed, 31 Jul 2013 09:44:00 +0000 http://www.hindawi.com/journals/bmri/2013/186972/ Nitric oxide (NO) found in the vicinity of lung cancer cells may play a role in the regulation of cancer cell behaviors. To explore the possible effects of NO on cell motility, human lung cancer cells were exposed to nontoxic concentrations of NO for 0–14 days, and the migratory characteristics of the cells were determined. The present study found that long-term treatment with NO significantly enhanced cell migration in a dose- and time-dependent manner. Furthermore, we found that the increased migratory action was associated with the increased expression of caveolin-1 (Cav-1), which in turn activated the focal adhesion kinase (FAK) and ATP-dependent tyrosine kinase (Akt) pathways. Notably, the NO-treated cells exhibited an increased number of filopodia per cell, as well as an increase in the levels of cell division cycle 42 (Cdc42) protein. Together, these results indicate that extended NO exposure has a novel effect on cell migration through a Cav-1-dependent mechanism, a finding that strengthens our understanding of cancer biology. Arpasinee Sanuphan, Preedakorn Chunhacha, Varisa Pongrakhananon, and Pithi Chanvorachote Copyright © 2013 Arpasinee Sanuphan et al. All rights reserved. An Attempted Substitute Study of Total Skin Electron Therapy Technique by Using Helical Photon Tomotherapy with Helical Irradiation of the Total Skin Treatment: A Phantom Result Wed, 31 Jul 2013 08:59:37 +0000 http://www.hindawi.com/journals/bmri/2013/108794/ An anthropomorphic phantom was used to investigate a treatment technique and analyze the dose distributions for helical irradiation of the total skin (HITS) by helical tomotherapy (HT). Hypothetical bolus of thicknesses of 0, 10, and 15 mm was added around the phantom body to account for the dose homogeneity and setup uncertainty. A central core structure was assigned as a “complete block” to force the dose tangential delivery. HITS technique with prescribed dose () of 36 Gy in 36 fractions was generated. The radiochromic EBT2 films were used for the dose measurements. The target region with 95.0% of the received by more than 95% of the PTV was obtained. The calculated mean doses for the organs at risk (OARs) were 4.69, 3.10, 3.20, and 2.94 Gy for the lung, heart, liver, and kidneys, respectively. The measurement doses on a phantom surface for a plan with 10 mm hypothetical bolus and bolus thicknesses of 0, 1, 2, and 3 mm are 89.5%, 111.4%, 116.9%, and 117.7% of , respectively. HITS can provide an accurate and uniform treatment dose in the skin with limited doses to OARs and is safe to replace a total skin electron beam regimen. Chi-Ta Lin, An-Cheng Shiau, Hui-Ju Tien, Hsin-Pei Yeh, Pei-Wei Shueng, and Chen-Hsi Hsieh Copyright © 2013 Chi-Ta Lin et al. All rights reserved. Association Study of Single Nucleotide Polymorphisms in XRCC1 Gene with Risk of Hepatocellular Carcinoma in Chinese Han Population Tue, 30 Jul 2013 11:13:51 +0000 http://www.hindawi.com/journals/bmri/2013/138785/ Hepatocellular carcinoma (HCC) is one of the most frequently causing cancer-related deaths worldwide. Previous evidence suggests that the X-ray repair cross-complementing group 1 gene (XRCC1) is an important candidate gene for influencing the risk of HCC. The aim of this study was to assess the association of XRCC1 genetic polymorphisms with the risk of HCC in Chinese Han population. A total of 1314 subjects, including 651 HCC patients and 663 healthy controls, were enrolled in this case-control study. Two genetic variants (c.1254C>T and c.1517G>C) in XRCC1 gene were genotyped by created restriction site-polymerase chain reaction (CRS-PCR) and PCR-restriction fragment length polymorphism (PCR-RFLP) methods. Our data indicated that the allele and genotype frequencies of these two genetic variants were statistical difference in HCC cases and healthy controls. Association analyses suggested that these two genetic variants were statistically associated with the increased risk of HCC in all genetic models (for c.1254C>T, TT versus CC: OR = 2.30, 95% CI 1.61–3.28; CT versus CC: OR = 1.32, 95% CI 1.05–1.67; TT/CT versus CC: OR = 1.50, 95% CI 1.20–1.86; TT versus CT/CC: OR = 2.00, 95% CI 1.43–2.80; T versus C: OR = 1.47, 95% CI 1.25–1.73; for c.1517G>C, CC versus GG: OR = 1.90, 95% CI 1.34–2.69; GC versus GG: OR = 1.56, 95% CI 1.24–1.97; CC/GC versus GG: OR = 1.63, 95% CI 1.31–2.03; CC versus GC/GG: OR = 1.52, 95% CI 1.10–2.11; C versus G: OR = 1.45, 95% CI 1.23–1.70). The allele-T of c.1254C>T and allele-C of c.1517G>C genetic variants may contribute to HCC susceptibility in Chinese Han population. Jingwang Bi, Chen Zhong, Kainan Li, Huili Chu, and Baocheng Wang Copyright © 2013 Jingwang Bi et al. All rights reserved. Expression of Bmi-1 in Pediatric Brain Tumors as a New Independent Prognostic Marker of Patient Survival Sun, 28 Jul 2013 10:51:04 +0000 http://www.hindawi.com/journals/bmri/2013/192548/ Objectives. The B-cell-specific moloney leukemia virus insertion site 1 (the Bmi-1) gene is an important member in the family of polycomb group (PcG) genes that plays an oncogenic role in several types of cancer, but it’s expression as a prognostic marker in pediatric brain tumors has not been indicated. Materials and Methods. The Bmi-1 gene expression, clinic pathological and prognostic significance in a series of pediatric brain tumors were examined by real-time PCR method in 56 pediatric brain tumors. Results. The Bmi-1 gene expression in various types of pediatric brain tumors compared to that in normal brain tissue was 4.85-fold. The relative expression varied from 8.64-fold in ependymomas to 2.89-fold in other types. Expression level in high-grade tumors compared to that in low-grade tumors was 2.5 times. In univariate survival analysis of the pediatric brain tumors, a significant association of high expression of the Bmi-1 with patient survival was demonstrated. In multivariate analysis, the Bmi-1 high expression provided significant independent prognostic factors. Conclusion. Increased expression of the Bmi-1 in pediatric brain tumors may be important in the acquisition of an aggressive phenotype. In addition, it can be used as a strong and independent molecular marker of prognosis in pediatric brain tumors. Shirin Farivar, Reza Zati Keikha, Reza Shiari, and Farzaneh Jadali Copyright © 2013 Shirin Farivar et al. All rights reserved. Identifying the Association Rules between Clinicopathologic Factors and Higher Survival Performance in Operation-Centric Oral Cancer Patients Using the Apriori Algorithm Thu, 25 Jul 2013 14:11:06 +0000 http://www.hindawi.com/journals/bmri/2013/359634/ This study computationally determines the contribution of clinicopathologic factors correlated with 5-year survival in oral squamous cell carcinoma (OSCC) patients primarily treated by surgical operation (OP) followed by other treatments. From 2004 to 2010, the program enrolled 493 OSCC patients at the Kaohsiung Medical Hospital University. The clinicopathologic records were retrospectively reviewed and compared for survival analysis. The Apriori algorithm was applied to mine the association rules between these factors and improved survival. Univariate analysis of demographic data showed that grade/differentiation, clinical tumor size, pathology tumor size, and OP grouping were associated with survival longer than 36 months. Using the Apriori algorithm, multivariate correlation analysis identified the factors that coexistently provide good survival rates with higher lift values, such as grade/differentiation = 2, clinical stage group = early, primary site = tongue, and group = OP. Without the OP, the lift values are lower. In conclusion, this hospital-based analysis suggests that early OP and other treatments starting from OP are the key to improving the survival of OSCC patients, especially for early stage tongue cancer with moderate differentiation, having a better survival (>36 months) with varied OP approaches. Jen-Yang Tang, Li-Yeh Chuang, Edward Hsi, Yu-Da Lin, Cheng-Hong Yang, and Hsueh-Wei Chang Copyright © 2013 Jen-Yang Tang et al. All rights reserved. Bovine Papillomavirus Clastogenic Effect Analyzed in Comet Assay Mon, 15 Jul 2013 14:03:43 +0000 http://www.hindawi.com/journals/bmri/2013/630683/ Bovine papillomavirus (BPV) is an oncogenic virus related to serious livestock diseases. Oncoproteins encoded by BPV are involved in several steps of cellular transformation and have been reported as presenting clastogenic effects in peripheral lymphocytes and primary culture cells. The aim of this study was to evaluate the clastogenic potential of BPV types 1, 2, and 4 by comet assay. Peripheral blood was collected from 37 bovines, 32 infected with different levels of papillomatosis (12 animals have no affection) and five calves, virus free (negative control). The viral identification showed presence of more than one virus type in 59.375% of the infected animals. Comet assay was performed according to alkaline technique. The Kruskal-Wallis test showed statistical difference between the negative control group and infected animals (). The Dunn post hoc test showed difference comparing the infected animals with calves. Mann-Whitney test verified no difference between animals infected with only one viral type and animals presenting more than one viral type. The comet assay is considered an efficient tool for assessment of damage in the host chromatin due to viral action, specifically highlighting viral activity in blood cells. R. P. Araldi, T. C. Melo, N. Diniz, J. Mazzuchelli-de-Souza, R. F. Carvalho, W. Beçak, and R. C. Stocco Copyright © 2013 R. P. Araldi et al. All rights reserved. Detection of the Epstein-Barr Virus and DNA-Topoisomerase II-α in Recurrent and Nonrecurrent Giant Cell Lesion of the Jawbones Mon, 15 Jul 2013 09:05:20 +0000 http://www.hindawi.com/journals/bmri/2013/327424/ The aims of this study were to determine whether the expression of Topo II- correlates with presence of EBV in giant cell lesion of the jawbones and whether it is predictive of clinical biologic behavior of these lesions. Paraffin-embedded tissues from 8 recurrent and 7 nonrecurrent cases of bony GCLs and 9 peripheral giant cell lesions (PGCLs) as a control group were assessed for the expression of EBV and Topo II- using immunohistochemistry. The results showed positive staining for Topo II- in mononuclear stromal cells (MSCs) and multinucleated giant cells (MGCs). Student t-test showed that mean Topo II- labelling index (LI) in recurrent cases was significantly higher than that in non-recurrent cases (). Moreover, Spearman's correlation coefficients method showed a significant correlation between DNA Topo II- LI and both of gender and site in these lesions. Moderate EBV expression in relation to the highest Topo II- LI was observed in two cases of GCT. It was concluded that high Topo II- LIs could be identified as reliable predicators for the clinical behavior of GCLs. Moreover, EBV has no etiological role in the benign CGCLs in contrast to its role in the pathogenesis of GCTs. Manal M. Zyada and Nagla M. Salama Copyright © 2013 Manal M. Zyada and Nagla M. Salama. All rights reserved. Analysis of Activated Platelet-Derived Growth Factor β Receptor and Ras-MAP Kinase Pathway in Equine Sarcoid Fibroblasts Thu, 11 Jul 2013 09:44:46 +0000 http://www.hindawi.com/journals/bmri/2013/283985/ Equine sarcoids are skin tumours of fibroblastic origin affecting equids worldwide. Bovine papillomavirus type-1 (BPV-1) and, less commonly, type-2 are recognized as etiological factors of sarcoids. The transforming activity of BPV is related to the functions of its major oncoprotein E5 which binds to the platelet-derived growth factor β receptor (PDGFβR) causing its phosphorylation and activation. In this study, we demonstrate, by coimmunoprecipitation and immunoblotting, that in equine sarcoid derived cell lines PDGFβR is phosphorylated and binds downstream molecules related to Ras-mitogen-activated protein kinase-ERK pathway thus resulting in Ras activation. Imatinib mesylate is a tyrosine kinase receptors inhibitor which selectively inhibits the activation of PDGFβR in the treatment of several human and animal cancers. Here we show that imatinib inhibits receptor phosphorylation, and cell viability assays demonstrate that this drug decreases sarcoid fibroblasts viability in a dose-dependent manner. This study contributes to a better understanding of the molecular mechanisms involved in the pathology of sarcoids and paves the way to a new therapeutic approach for the treatment of this common equine skin neoplasm. Gennaro Altamura, Annunziata Corteggio, Lubna Nasir, Zheng Qiang Yuan, Franco Roperto, and Giuseppe Borzacchiello Copyright © 2013 Gennaro Altamura et al. All rights reserved. Investigating Mechanisms of Alkalinization for Reducing Primary Breast Tumor Invasion Wed, 10 Jul 2013 13:56:06 +0000 http://www.hindawi.com/journals/bmri/2013/485196/ The extracellular pH (pHe) of many solid tumors is acidic as a result of glycolytic metabolism and poor perfusion. Acidity promotes invasion and enhances metastatic potential. Tumor acidity can be buffered by systemic administration of an alkaline agent such as sodium bicarbonate. Tumor-bearing mice maintained on sodium bicarbonate drinking water exhibit fewer metastases and survive longer than untreated controls. We predict this effect is due to inhibition of tumor invasion. Reducing tumor invasion should result in fewer circulating tumor cells (CTCs). We report that bicarbonate-treated MDA-MB-231 tumor-bearing mice exhibited significantly lower numbers of CTCs than untreated mice (). Tumor pHe buffering may reduce optimal conditions for enzymes involved in tumor invasion such as cathepsins and matrix metalloproteases (MMPs). To address this, we tested the effect of transient alkalinization on cathepsin and MMP activity using enzyme activatable fluorescence agents in mice bearing MDA-MB-231 mammary xenografts. Transient alkalinization significantly reduced the fluorescent signal of protease-specific activatable agents in vivo (). Alkalinization, however, did not affect expression of carbonic anhydrase IX (CAIX). The findings suggest a possible mechanism in a live model system for breast cancer where systemic alkalinization slows the rate of invasion. Ian F. Robey and Lance A. Nesbit Copyright © 2013 Ian F. Robey and Lance A. Nesbit. All rights reserved. Diffusion-Weighted Magnetic Resonance Application in Response Prediction before, during, and after Neoadjuvant Radiochemotherapy in Primary Rectal Cancer Carcinoma Wed, 10 Jul 2013 13:48:02 +0000 http://www.hindawi.com/journals/bmri/2013/740195/ Introduction. Our interest was to monitor treatment response using ADC value to predict response of rectal tumour to preoperative radiochemotherapy. Materials and Methods. Twenty-two patients were treated with long course of radiochemotherapy, followed by surgery. Patients were examined by diffusion-weighted imaging MRI at three-time points (prior, during, and after radiochemotherapy) and were classified as responders and nonresponders. Results. A statistical significant correlation was found between preradiochemotherapy ADC values and during treatment ADC values, in responders (, value ). An increase in ADC value during treatment was predictive of at least a partial response. Discussion. Response of tumour to neoadjuvant therapy cannot be easily evaluated, and such capability might be of great importance in clinical practice, because the number of irradiated and operated patients may be superior to the number of who will really benefit from this multimodal treatment. A reliable prediction of the final clinical TN stage would allow radiotherapist to adapt multidisciplinary approach to a less invasive management, sparing surgical procedure in responder patients or even allowing an early surgery in nonresponders, which would significantly reduce radiochemotherapy related toxicity. Conclusion. Early evaluation of response during neoadjuvant radiochemotherapy treatment shows great promise to predict tumour response. Daniela Musio, Francesca De Felice, Anna Lisa Magnante, Maria Ciolina, Carlo Nicola De Cecco, Marco Rengo, Adriano Redler, Andrea Laghi, Nicola Raffetto, and Vincenzo Tombolini Copyright © 2013 Daniela Musio et al. All rights reserved. Dose Verification in Intensity Modulation Radiation Therapy: A Fractal Dimension Characteristics Study Mon, 08 Jul 2013 08:37:51 +0000 http://www.hindawi.com/journals/bmri/2013/349437/ Purpose. This study describes how to identify the coincidence of desired planning isodose curves with film experimental results by using a mathematical fractal dimension characteristic method to avoid the errors caused by visual inspection in the intensity modulation radiation therapy (IMRT). Methods and Materials. The isodose curves of the films delivered by linear accelerator according to Plato treatment planning system were acquired using Osiris software to aim directly at a single interested dose curve for fractal characteristic analysis. The results were compared with the corresponding planning desired isodose curves for fractal dimension analysis in order to determine the acceptable confidence level between the planning and the measurement. Results. The film measured isodose curves and computer planning curves were deemed identical in dose distribution if their fractal dimensions are within some criteria which suggested that the fractal dimension is a unique fingerprint of a curve in checking the planning and film measurement results. The dose measured results of the film were presumed to be the same if their fractal dimension was within 1%. Conclusions. This quantitative rather than qualitative comparison done by fractal dimension numerical analysis helps to decrease the quality assurance errors in IMRT dosimetry verification. Jia-Ming Wu, Chung-Ming Kuo, and Ching-Jiang Chen Copyright © 2013 Jia-Ming Wu et al. All rights reserved. Nonsmall Cell Lung Cancer Therapy: Insight into Multitargeted Small-Molecule Growth Factor Receptor Inhibitors Mon, 01 Jul 2013 13:38:59 +0000 http://www.hindawi.com/journals/bmri/2013/964743/ To date, lung cancer is the leading cause of cancer-related death worldwide, among which nonsmall cell lung cancer (NSCLC) comprises about 85%. Taking into account the side effects of surgery, radiation, platinum-based doublet chemotherapy, and the growth self-sufficiency characteristic of cancer cells, drugs have been discovered toward growth factor receptor (GFR) to treat NSCLC. As expected, these drugs provide a greater benefit. To increase the efficacy of such growth factor receptor tyrosine kinase inhibitors (RTKIs), coinhibition of GFR signaling pathways and combination of inhibitors along with radiation or chemotherapy have drew intense insight. Although clinical trials about single-agent RTKIs or their combination strategies suggest their increase potency against cancer, they are not beyond adverse effects, and sometimes the effects are more deadly than chemotherapy. Nevertheless the hope for RTKIs may be proved true by further researches and digging deep into cancer therapeutics. Mridul Roy, Yu-Hao Luo, Mao Ye, and Jing Liu Copyright © 2013 Mridul Roy et al. All rights reserved. Total Body Irradiation with Step Translation and Dynamic Field Matching Mon, 01 Jul 2013 09:47:51 +0000 http://www.hindawi.com/journals/bmri/2013/216034/ The purpose of this study is to develop a total body irradiation technique that does not require additional devices or sophisticated processes to overcome the space limitation of a small treatment room. The technique aims to deliver a uniform dose to the entire body while keeping the lung dose within the tolerance level. The technique treats the patient lying on the floor anteriorly and posteriorly. For each AP/PA treatment, two complementary fields with dynamic field edges are matched over an overlapped region defined by the marks on the body surface. A compensator, a spoiler, and lung shielding blocks were used during the treatment. Moreover, electron beams were used to further boost the chest wall around the lungs. The technique was validated in a RANDO phantom using GAFCHROMIC films. Dose ratios at different body sites along the midline ranged from 0.945 to 1.076. The dose variation in the AP direction ranged from 96.0% to 104.6%. The dose distribution in the overlapped region ranged from 98.5% to 102.8%. Lateral dose profiles at abdomen and head revealed 109.8% and 111.7% high doses, respectively, at the body edges. The results confirmed that the technique is capable of delivering a uniform dose distribution to the midline of the body in a small treatment room while keeping the lung dose within the tolerance level. Ho-Hsing Chen, Jay Wu, Keh-Shih Chuang, Jia-Fu Lin, Jia-Cheng Lee, and Jin-Ching Lin Copyright © 2013 Ho-Hsing Chen et al. All rights reserved. Meta-Analysis of Microarray Data Identifies GAS6 Expression as an Independent Predictor of Poor Survival in Ovarian Cancer Thu, 27 Jun 2013 09:33:09 +0000 http://www.hindawi.com/journals/bmri/2013/238284/ Seeking new biomarkers for epithelial ovarian cancer, the fifth most common cause of death from all cancers in women and the leading cause of death from gynaecological malignancies, we performed a meta-analysis of three independent studies and compared the results in regard to clinicopathological parameters. This analysis revealed that GAS6 was highly expressed in ovarian cancer and therefore was selected as our candidate of choice. GAS6 encodes a secreted protein involved in physiological processes including cell proliferation, chemotaxis, and cell survival. We performed immunohistochemistry on various ovarian cancer tissues and found that GAS6 expression was elevated in tumour tissue samples compared to healthy control samples (). In addition, GAS6 expression was also higher in tumours from patients with residual disease compared to those without. Our data propose GAS6 as an independent predictor of poor survival, suggesting GAS6, both on the mRNA and on the protein level, as a potential biomarker for ovarian cancer. In clinical practice, the staining of a tumour biopsy for GAS6 may be useful to assess cancer prognosis and/or to monitor disease progression. Michelle Buehler, Brian Tse, Alix Leboucq, Francis Jacob, Rosmarie Caduff, Daniel Fink, Darlene R. Goldstein, and Viola Heinzelmann-Schwarz Copyright © 2013 Michelle Buehler et al. All rights reserved. Expression and In Silico Analysis of the Recombinant Bovine Papillomavirus E6 Protein as a Model for Viral Oncoproteins Studies Wed, 26 Jun 2013 11:25:49 +0000 http://www.hindawi.com/journals/bmri/2013/421398/ Bovine papillomaviruses (BPVs) are recognized as the causal agents of economical relevant diseases in cattle, associated with the development of tumors in skin and mucosa. The oncogenesis process is mainly associated with different viral oncoprotein expressions, which are involved in cell transformation. The expression and characterization of recombinant viral oncoproteins represent an attractive strategy to obtain biotechnological products as antibodies and potential vaccines, Thus, the aim of this work was to clone and express the BPV-1 and BPV-2 E6 recombinant proteins and perform in silico analysis in order to develop a strategy for the systematic study of other papillomaviruses oncoproteins. The results demonstrated that BPV-1 and BPV-2 E6 recombinant proteins were expressed and purified from bacterial system as well as its in silico analysis was performed in order to explore and predict biological characteristics of these proteins. J. Mazzuchelli-de-Souza, R. F. Carvalho, R. M. Ruiz, T. C. Melo, R. P. Araldi, E. Carvalho, C. E. Thompson, M. P. Sircili, W. Beçak, and R. C. Stocco Copyright © 2013 J. Mazzuchelli-de-Souza et al. All rights reserved. Interference with RUNX1/ETO Leukemogenic Function by Cell-Penetrating Peptides Targeting the NHR2 Oligomerization Domain Tue, 25 Jun 2013 13:19:48 +0000 http://www.hindawi.com/journals/bmri/2013/297692/ The leukemia-associated fusion protein RUNX1/ETO is generated by the chromosomal translocation t(8;21) which appears in about 12% of all de novo acute myeloid leukemias (AMLs). Essential for the oncogenic potential of RUNX1/ETO is the oligomerization of the chimeric fusion protein through the nervy homology region 2 (NHR2) within ETO. In previous studies, we have shown that the intracellular expression of peptides containing the NHR2 domain inhibits RUNX1/ETO oligomerization, thereby preventing cell proliferation and inducing differentiation of RUNX1/ETO transformed cells. Here, we show that introduction of a recombinant TAT-NHR2 fusion polypeptide into the RUNX1/ETO growth-dependent myeloid cell line Kasumi-1 results in decreased cell proliferation and increased numbers of apoptotic cells. This effect was highly specific and mediated by binding the TAT-NHR2 peptide to ETO sequences, as TAT-polypeptides containing the oligomerization domain of BCR did not affect cell proliferation or apoptosis in Kasumi-1 cells. Thus, the selective interference with NHR2-mediated oligomerization by peptides represents a challenging but promising strategy for the inhibition of the leukemogenic potential of RUNX1/ETO in t(8;21)-positive leukemia. Yvonne Bartel, Manuel Grez, and Christian Wichmann Copyright © 2013 Yvonne Bartel et al. All rights reserved. Bovine Papillomavirus in Brazil: Detection of Coinfection of Unusual Types by a PCR-RFLP Method Mon, 24 Jun 2013 09:32:45 +0000 http://www.hindawi.com/journals/bmri/2013/270898/ Bovine papillomavirus (BPV) is recognized as a causal agent of benign and malignant tumors in cattle. Thirteen types of BPV are currently characterized and classified into three distinct genera, associated with different pathological outcomes. The described BPV types as well as other putative ones have been demonstrated by molecular biology methods, mainly by the employment of degenerated PCR primers. Specifically, divergences in the nucleotide sequence of the L1 gene are useful for the identification and classification of new papillomavirus types. On the present work, a method based on the PCR-RFLP technique and DNA sequencing was evaluated as a screening tool, allowing for the detection of two relatively rare types of BPV in lesions samples from a six-year-old Holstein dairy cow, chronically affected with cutaneous papillomatosis. These findings point to the dissemination of BPVs with unclear pathogenic potential, since two relatively rare, new described BPV types, which were first characterized in Japan, were also detected in Brazil. R. F. Carvalho, S. T. Sakata, D. N. S. Giovanni, E. Mori, P. E. Brandão, L. J. Richtzenhain, C. R. Pozzi, J. R. P. Arcaro, M. S. Miranda, J. Mazzuchelli-de-Souza, T. C. Melo, G. Comenale, S. L. M. R. Assaf, W. Beçak, and R. C. Stocco Copyright © 2013 R. F. Carvalho et al. All rights reserved. Loss of RASSF1A Expression in Colorectal Cancer and Its Association with K-ras Status Sat, 22 Jun 2013 14:36:01 +0000 http://www.hindawi.com/journals/bmri/2013/976765/ Background. The RAS-association domain family 1 A (RASSF1A) is a classical member of RAS effectors regulating cell proliferation and apoptosis. Loss of RASSF1A expression may shift the balance towards a growth-promoting effect without the necessity of activating K-ras mutations. Its potential association with K-ras mutations in colorectal cancer (CRC) is unclear. Methods. RASSF1A expression was examined in normal mucosa, adenoma, and tumor tissues of colon and rectum, respectively. We examined the association of RASSF1A expression, mutations of K-ras, and EGFR status in 76 primary CRCs. The relationship between clinicopathological characteristics and RASSF1A expression was also analyzed. Results. RASSF1A expression level decreased progressively in normal mucosa, adenoma and, tumor tissues, and the loss of RASSF1A expression occurred more frequently in tumor tissues. Of 76 primary CRCs, loss of RASSF1A expression and/or K-ras mutations were detected in 77% cases. Loss of RASSF1A expression was more frequent in K-ras wild-type than in mutation cases (63% versus 32%, ). Conclusions. Our study indicates that loss of RASSF1A may be involved in pathogenesis of CRC, its expression was found predominantly in K-ras wild-type CRCs, suggesting that it may be another way of affecting RAS signaling, in addition to K-ras mutations. Dan Cao, Ye Chen, Yuan Tang, Xing-Chen Peng, Hang Dong, Long-Hao Li, Ke Cheng, Jun Ge, and Ji-Yan Liu Copyright © 2013 Dan Cao et al. All rights reserved. Prevalence and Genetic Variability in Capsid L1 Gene of Rare Human Papillomaviruses (HPV) Found in Cervical Lesions of Women from North-East Brazil Thu, 20 Jun 2013 10:40:50 +0000 http://www.hindawi.com/journals/bmri/2013/546354/ The aim of this study was to examine the prevalence and genetic variability of the capsid L1 gene of rare HPV genotypes that were found in the cervical lesions of women from North-East Brazil. A total number of 263 patients were included in this study. HPV detection was performed using PCR followed by direct sequencing of MY09/11, as well as type-specific PCR to detect the Alpha-9 species. Epitope prediction was performed to determine whether or not the genetic variants are inserted in B-cell and T-cell epitopes. The prevalence of rare HPV types in cervical lesions was found to be 9.47%. The rare HPV genotypes that were detected were HPV-53, 54, 56, 61, 62, 66, 70, and 81. The genetic variability in the L1 gene of rare HPV types involved thirty nucleotide changes, eight of which were detected for the first time in this study. Moreover, some of these variants are embedded in B-cell or T-cell epitope regions. The results of this research suggest that rare HPV types might be involved in cervical lesions and some of these variants can be found in B-cell and T-cell epitopes. Data on the prevalence and variability of rare HPV types will assist in clarifying the role of these viruses in carcinogenesis. Ana Pavla Almeida Diniz Gurgel, Bárbara Simas Chagas, Carolina Maria Medeiros do Amaral, Eugênia Maria Bezerra Albuquerque, Ivi Gonçalves Soares Santos Serra, Jacinto da Costa Silva Neto, Maria Tereza Cartaxo Muniz, and Antonio Carlos de Freitas Copyright © 2013 Ana Pavla Almeida Diniz Gurgel et al. All rights reserved. 18F-FDG PET in the Diagnosis and Treatment of Primary Central Nervous System Lymphoma Mon, 17 Jun 2013 18:40:01 +0000 http://www.hindawi.com/journals/bmri/2013/247152/ This paper summarizes the usefulness and limitation of positron emission tomography (PET) with 18F-fluorodeoxyglucose (18F-FDG) in the diagnosis and treatment of primary central nervous system lymphoma (PCNSL). The 18F-FDG uptake in typical PCNSL is about 2.5 times higher than that in the normal gray matter, and the tumor can usually be identified visually. The 18F-FDG uptake pattern and value provide useful information for differentiating PCNSL from other enhancing malignant brain tumors especially glioblastoma (GB). The 18F-FDG uptake in typical PCNSL is usually homogenous, and the uptake value is significantly higher than that in GB. However, 18F-FDG PET often fails to show the presence of tumor in the brain as 18F-FDG uptake is faint in atypical PCNSL such as disseminated or nonenhancing lesions. 18F-FDG PET is also useful for evaluating the treatment response at a very early stage after the initial treatment. Pretreatment and posttreatment 18F-FDG uptake values may have a prognostic value in patients with PCNSL. In conclusion, 18F-FDG PET is very useful in the diagnosis of typical PCNSL and can differentiate PCNSL from other malignant brain tumors. However, the usefulness of 18F-FDG PET is limited in the diagnosis of atypical PCNSL. Nobuyuki Kawai, Keisuke Miyake, Yuka Yamamoto, Yoshihiro Nishiyama, and Takashi Tamiya Copyright © 2013 Nobuyuki Kawai et al. All rights reserved. TrkAIII Promotes Microtubule Nucleation and Assembly at the Centrosome in SH-SY5Y Neuroblastoma Cells, Contributing to an Undifferentiated Anaplastic Phenotype Thu, 06 Jun 2013 09:37:10 +0000 http://www.hindawi.com/journals/bmri/2013/740187/ The alternative TrkAIII splice variant is expressed by advanced stage human neuroblastomas (NBs) and exhibits oncogenic activity in NB models. In the present study, employing stable transfected cell lines and assays of indirect immunofluorescence, immunoprecipitation, Western blotting, microtubule regrowth, tubulin kinase, and tubulin polymerisation, we report that TrkAIII binds α-tubulin and promotes MT nucleation and assembly at the centrosome. This effect depends upon spontaneous TrkAIII activity, TrkAIII localisation to the centrosome and pericentrosomal area, and the capacity of TrkAIII to bind, phosphorylate, and polymerise tubulin. We propose that this novel role for TrkAIII contributes to MT involvement in the promotion and maintenance of an undifferentiated anaplastic NB cell morphology by restricting and augmenting MT nucleation and assembly at the centrosomal MTOC. Antonietta R. Farina, Natalia Di Ianni, Lucia Cappabianca, Pierdomenico Ruggeri, Marzia Ragone, Giulia Ianni, Alberto Gulino, and Andrew R. Mackay Copyright © 2013 Antonietta R. Farina et al. All rights reserved. Bovine Papillomavirus Type 2 Infection and a Series of Mesenchymal Tumors of the Urinary Bladder in Cattle Wed, 05 Jun 2013 17:37:30 +0000 http://www.hindawi.com/journals/bmri/2013/814635/ This report describes the histopathology of two hundred and fifty-three mesenchymal tumors of the urinary bladder in cattle grazing on lands rich in bracken fern. Approximately 80% were hemangiomas and angiosarcomas. Hemangioma (capillary, cavernous, and large vessels) was the most frequent mesenchymal tumor and was more common than angiosarcoma. Although the appearance of endothelial cells can vary remarkably, epithelioid angiosarcomas, often containing multinucleated cells, were the most frequent malignant vascular tumors. Hemangiopericytoma and tumors of muscle and soft connective tissue origin, alone and/or in association with tumor-like lesions, were less frequently seen. Furthermore, forty-five cases of intravascular papillary endothelial hyperplasia (IPEH), a lesion not previously reported in the urinary bladder of cattle, were also described. Bovine papillomavirus type-2 DNA was amplified in tumor samples. Forty vascular tumors were investigated by dual-labeling immunofluorescence, and, for the first time, a coexpression of E5 and platelet-derived growth factor β receptor (PDGFβR) was shown to occur. The results show that the BPV-2 E5 oncoprotein binds to the activated form of the PDGFβ receptor thus playing an important role in mesenchymal as well as epithelial carcinogenesis of the urinary bladder. Furthermore, these findings demonstrate that BPV-2 infects both epithelial and mesenchymal cells. Manuela Martano, Franco Roperto, Rita de Cassia Stocco, Valeria Russo, Giuseppe Borzacchiello, Orlando Paciello, Valentina Iovane, Leonardo Leonardi, Paola Maiolino, Brunella Restucci, Serenella Papparella, and Sante Roperto Copyright © 2013 Manuela Martano et al. All rights reserved. Long Noncoding RNA HOTAIR Is Associated with Motility, Invasion, and Metastatic Potential of Metastatic Melanoma Wed, 05 Jun 2013 14:55:21 +0000 http://www.hindawi.com/journals/bmri/2013/251098/ Metastatic melanoma, the primary cause of skin cancer-related death, warrants new therapeutic approaches that target the regulatory machinery at molecular level. While long noncoding RNAs (lncRNAs) are dysregulated in a number of cancer types, limited data are available on the expression and function of lncRNAs in melanoma metastasis. The primary objective of this study was to investigate the role of 6 metastasis-related lncRNAs in pairs of primary melanoma and matched lymph node metastatic tissues. Among the tested lncRNAs, HOTAIR was the most highly expressed in lymph node metastasis. The role of HOTAIR in melanoma cell motility and invasion was further evaluated by knocking down HOTAIR with siRNAs. Knockdown of HOTAIR resulted in the reduction of motility and invasion of human melanoma cell line A375, as assessed by wound healing assay and Matrigel-based invasion assay. siHOTAIR also suppressed the degradation of gelatin matrix, suggesting that HOTAIR promotes gelatinase activity. Together, our study shows that HOTAIR is overexpressed in metastatic tissue, which is associated with the ability of HOTAIR to promote melanoma cell motility and invasion. These data indicate that lncRNAs may be involved in the metastasis of melanoma and provide support for further evaluation of lncRNAs in melanoma. Lihua Tang, Wei Zhang, Bing Su, and Bo Yu Copyright © 2013 Lihua Tang et al. All rights reserved. Assessment of Respiration-Induced Motion and Its Impact on Treatment Outcome for Lung Cancer Tue, 04 Jun 2013 09:44:11 +0000 http://www.hindawi.com/journals/bmri/2013/872739/ This study presented the analysis of free-breathing lung tumor motion characteristics using GE 4DCT and Varian RPM systems. Tumor respiratory movement was found to be associated with GTV size, the superior-inferior tumor location in the lung, and the attachment degree to rigid structure (e.g., chest wall, vertebrae, or mediastinum), with tumor location being the most important factor among the other two. Improved outcomes in survival and local control of 43 lung cancer patients were also reported. Consideration of respiration-induced motion based on 4DCT for lung cancer yields individualized margin and more accurate and safe target coverage and thus can potentially improve treatment outcome. Yan Wang, Yong Bao, Li Zhang, Wei Fan, Han He, Zong-Wen Sun, Xiao Hu, Shao-Min Huang, Ming Chen, and Xiao-Wu Deng Copyright © 2013 Yan Wang et al. All rights reserved. Increased Expression of TRPS1 Affects Tumor Progression and Correlates with Patients' Prognosis of Colon Cancer Sun, 26 May 2013 14:55:58 +0000 http://www.hindawi.com/journals/bmri/2013/454085/ Aim. To detect the expression pattern of tricho-rhino-phalangeal syndrome-1 (TRPS1) in human colon cancer and to analyze its correlation with prognosis of patients with this disease. Methods. The expressions of TRPS1 in human colon cancer and its corresponding noncancerous colon tissues were detected at both mRNA and protein levels. Results. The mRNA and protein expression levels of TRPS1 were both significantly higher in colon cancer than in corresponding noncancerous colon tissues (both ). The protein level of TRPS1 in colon cancer tissues was significantly correlated with the mRNA level (, ). Additionally, immunohistochemistry analysis also found increased TRPS1 expression in 63.0% (63/100) of colon cancer tissues. High TRPS1 expression was significantly associated with positive lymph node metastasis () and higher pathological stage () of patients with colon cancer. Multivariate Cox regression analysis further suggested that the increased expression of TRPS1 was an independent poor prognostic factor for this disease. Conclusion. Our data offer the convincing evidence for the first time that the increased expression of TRPS1 may be involved in the pathogenesis and progression of colon cancer. TRPS1 might be a potential marker to predict the prognosis in colon cancer. Jun Hong, Jie Sun, and Tao Huang Copyright © 2013 Jun Hong et al. All rights reserved. Plasma HULC as a Promising Novel Biomarker for the Detection of Hepatocellular Carcinoma Wed, 22 May 2013 15:08:02 +0000 http://www.hindawi.com/journals/bmri/2013/136106/ Hepatocellular carcinoma (HCC) is a leading cause of cancer death in many Asian and African countries. Lack of early diagnosis tools is one of the clinical obstacles for effective treatment of HCC. Thus, enhanced understanding of the molecular changes associated with HCC is urgently needed to develop novel strategies for the diagnosis and treatment of this dismal disease. While aberrant expression of long noncoding RNAs (lncRNAs) has been functionally associated with certain cancers, the expression profiles and biological relevance of lncRNAs in HCC remain unclear. Highly upregulated in liver cancer (HULC) lncRNA has been implicated in the regulation of hepatoma cell proliferation. In this study, we demonstrate that HULC expression is significantly higher in HCC tumors compared to normal liver tissues. Among the tumor tissues, higher HULC expression is positively associated with Edmondson histological grades or with hepatitis B (HBV) positive status. Moreover, HULC lncRNA is detected with higher frequency in the plasma of HCC patients compared to healthy controls. Higher HULC detection rates are observed in the plasma of patients with higher Edmondson grades or with HBV+ status. These findings indicate for the first time that the expression of HULC in plasma can be used as a noninvasive promising novel biomarker for the diagnosis and/or prognosis of HCC. Hui Xie, Hongwei Ma, and Danqiu Zhou Copyright © 2013 Hui Xie et al. All rights reserved. Bovine Papillomavirus Type 2 Infection and Microscopic Patterns of Urothelial Tumors of the Urinary Bladder in Water Buffaloes Wed, 22 May 2013 09:16:31 +0000 http://www.hindawi.com/journals/bmri/2013/937918/ Microscopic patterns of thirty-four urothelial tumors of the urinary bladder of water buffaloes from the Marmara and Black Sea Regions of Turkey are here described. All the animals grazed on lands rich in bracken fern. Histological diagnosis was assessed using morphological parameters recently suggested for the urinary bladder tumors of cattle. Papillary carcinoma was the most common neoplastic lesion (22/34) observed in this study, and low-grade carcinoma was more common (seventeen cases) than high-grade carcinoma (five cases). Papilloma, papillary urothelial neoplasm of low malignant potential (PUNLMP), and invasive carcinomas were less frequently seen. Carcinoma in situ (CIS) was often detected associated with some papillary and invasive carcinomas. De novo (primary) CIS was rare representing 3% of tumors of this series. A peculiar feature of the most urothelial tumors was the presence in the tumor stroma of immune cells anatomically organized in tertiary lymphoid organs (TLOs). Bovine papillomavirus type-2 (PV-2) E5 oncoprotein was detected by molecular and immunohistochemistry procedures. Early protein, E2, and late protein, L1, were also detected by immunohistochemical studies. Morphological and molecular findings show that BPV-2 infection contributes to the development of urothelial bladder carcinogenesis also in water buffaloes. Paola Maiolino, Ayhan Özkul, Aylin Sepici-Dincel, Franco Roperto, Gözde Yücel, Valeria Russo, Chiara Urraro, Roberta Lucà, Marita Georgia Riccardi, Manuela Martano, Giuseppe Borzacchiello, Iolanda Esposito, and Sante Roperto Copyright © 2013 Paola Maiolino et al. All rights reserved. Positron Emission Tomography as a Surrogate Marker for Evaluation of Treatment Response in Patients with Desmoid Tumors under Therapy with Imatinib Thu, 16 May 2013 16:08:49 +0000 http://www.hindawi.com/journals/bmri/2013/389672/ We used 2-deoxy-2-[18F] fluoro-D-glucose (FDG) positron emission tomography (PET) to evaluate patients with desmoid tumors undergoing therapy with imatinib. The study included 22 patients with progressive disease (PD) of a biopsy proven desmoid tumor treated orally with imatinib 800 mg daily. Patients were examined using PET prior to onset of therapy and during treatment. Restaging was performed in parallel using computed tomography (CT) and/or magnetic resonance imaging (MRI). Outcome of 22 evaluable patients was as follows: five patients with partial response (PR); twelve patients with stable disease (SD) accounting for 77% with non-progressive disease; five patients showed PD. A 30% decrease of the mean average standardized uptake value (SUV) of sequential PET examinations could be demonstrated; no patient demonstrated a substantial increase in SUV. Patients with PR/SD were matched to a group of nonprogressive disease and tested versus PD. The initial average SUV and seem to be candidates for a response prediction with an approximate -value of 0.06553 and 0.07785, respectively. This is the first larger series of desmoid patients monitored using PET showing that early SUV changes may help to discriminate responders from nonresponders and, thus, to decide whether imatinib therapy should be continued. Bernd Kasper, Antonia Dimitrakopoulou-Strauss, Lothar R. Pilz, Ludwig G. Strauss, Christos Sachpekidis, and Peter Hohenberger Copyright © 2013 Bernd Kasper et al. All rights reserved. Quo Vadis Radiotherapy? Technological Advances and the Rising Problems in Cancer Management Thu, 16 May 2013 10:04:47 +0000 http://www.hindawi.com/journals/bmri/2013/749203/ Purpose. Despite the latest technological advances in radiotherapy, cancer control is still challenging for several tumour sites. The survival rates for the most deadly cancers, such as ovarian and pancreatic, have not changed over the last decades. The solution to the problem lies in the change of focus: from local treatment to systemic therapy. The aim of this paper is to present the current status as well as the gaps in radiotherapy and, at the same time, to look into potential solutions to improve cancer control and survival. Methods. The currently available advanced radiotherapy treatment techniques have been analysed and their cost-effectiveness discussed. The problem of systemic disease management was specifically targeted. Results. Clinical studies show limited benefit in cancer control from hadron therapy. However, targeted therapies together with molecular imaging could improve treatment outcome for several tumour sites while controlling the systemic disease. Conclusion. The advances in photon therapy continue to be competitive with the much more expensive hadron therapy. To justify the cost effectiveness of proton/heavy ion therapy, there is a need for phase III randomised clinical trials. Furthermore, the success of systemic disease management lies in the fusion between radiation oncology technology and microbiology. Barry J. Allen, Eva Bezak, and Loredana G. Marcu Copyright © 2013 Barry J. Allen et al. All rights reserved. Mechanisms by Which Interleukin-6 Attenuates Cell Invasion and Tumorigenesis in Human Bladder Carcinoma Cells Thu, 16 May 2013 09:31:25 +0000 http://www.hindawi.com/journals/bmri/2013/791212/ Interleukin-6, a multifunctional cytokine, contributes to tumor cell proliferation and differentiation. However, the biological mechanisms that are affected by the expression of interleukin-6 in bladder cancer cells remain unclear. We evaluated the effects of interleukin-6 expression in human bladder carcinoma cells in vitro and in vivo. The results of interleukin-6-knockdown experiments in T24 cells and interleukin-6-overexpression experiments in HT1376 cells revealed that interleukin-6 reduced cell proliferation, migration, and invasion in vitro. Xenograft animal studies indicated that the overexpression of interleukin-6 downregulated tumorigenesis of bladder cells and that interleukin-6 knockdown reversed this effect. The results of RT-PCR, immunoblotting, and reporter assays indicated that the overexpression of interleukin-6 upregulated the expression of the mammary serine protease inhibitor (MASPIN), N-myc downstream gene 1 (NDRG1), and KAI1 proteins in HT1376 cells and that interleukin-6 knockdown reduced the expression of these proteins in T24 cells. In addition, results of immunoblotting assays revealed that interleukin-6 modulated epithelial-mesenchymal transitions by upregulating the expression of the E-cadherin, while downregulation N-cadherin and vimentin proteins. Our results suggest that the effects of interleukin-6 on the regulation of epithelial-mesenchymal transitions and the expressions of the MASPIN, NDRG1, and KAI1 genes attribute to the modulation of tumorigenesis in human bladder carcinoma cells. Ke-Hung Tsui, Shyi-Wu Wang, Li-Chuan Chung, Tsui-Hsia Feng, Tzu-Yi Lee, Phei-Lang Chang, and Horng-Heng Juang Copyright © 2013 Ke-Hung Tsui et al. All rights reserved. Hereditary Tumours Tue, 14 May 2013 09:48:47 +0000 http://www.hindawi.com/journals/bmri/2013/490357/ Francesco Baudi Copyright © 2013 Francesco Baudi. All rights reserved. Hypomethylation of ETS Transcription Factor Binding Sites and Upregulation of PARP1 Expression in Endometrial Cancer Mon, 13 May 2013 08:31:10 +0000 http://www.hindawi.com/journals/bmri/2013/946268/ Although PARP1 promoter methylation is involved in the regulation of PARP1 expression in human keratinocyte lines and lymphoblastoid cell lines, its roles in human endometrial cancer are unknown. DNA from forty normal endometrium (NE) and fifty endometrial adenocarcinoma (EAC) tissues were analyzed by bisulfite sequencing using primers focusing on the core promoter region of PARP1. Expression levels of PARP1 were assessed by immunohistochemistry and real-time PCR. Associations between patient clinicopathological characteristics and PARP1 protein levels were assessed by Fisher’s exact test. Here, PARP1 mRNA and protein were overexpressed in EAC tissues . CpG sites within the ETS motif in the PARP1 promoter exhibited significant hypomethylation in EAC tissues, and there was a significant negative correlation between PARP1 mRNA levels and the number of methylated sites in both NE and EAC tissues (, ). Notably, PARP1 protein expression was associated with FIGO stage , histological grade , and body mass index . Our findings imply that PARP1 overexpression may participate in endometrial cancer progression, and abnormal hypomethylation of CpG sites within the ETS motif in the core promoter region may be responsible for PARP1 overexpression in EAC tissues. Fang-Fang Bi, Da Li, and Qing Yang Copyright © 2013 Fang-Fang Bi et al. All rights reserved. Involved-Field Radiotherapy versus Elective Nodal Irradiation in Combination with Concurrent Chemotherapy for Locally Advanced Non-Small Cell Lung Cancer: A Prospective Randomized Study Mon, 13 May 2013 08:09:49 +0000 http://www.hindawi.com/journals/bmri/2013/371819/ This prospective randomized study is to evaluate the locoregional failure and its impact on survival by comparing involved field radiotherapy (IFRT) with elective nodal irradiation (ENI) in combination with concurrent chemotherapy for locally advanced non-small cell lung cancer. It appears that higher dose could be delivered in IFRT arm than that in ENI arm, and IFRT did not increase the risk of initially uninvolved or isolated nodal failures. Both a tendency of improved locoregional progression-free survival and a significant increased overall survival rate are in favor of IFRT arm in this study. Ming Chen, Yong Bao, Hong-Lian Ma, Xiao Hu, Jin Wang, Yan Wang, Fang Peng, Qi-Chao Zhou, and Cong-Hua Xie Copyright © 2013 Ming Chen et al. All rights reserved. MMP1, MMP9, and COX2 Expressions in Promonocytes Are Induced by Breast Cancer Cells and Correlate with Collagen Degradation, Transformation-Like Morphological Changes in MCF-10A Acini, and Tumor Aggressiveness Thu, 09 May 2013 08:54:29 +0000 http://www.hindawi.com/journals/bmri/2013/279505/ Tumor-associated immune cells often lack immune effector activities, and instead they present protumoral functions. To understand how tumors promote this immunological switch, invasive and noninvasive breast cancer cell (BRC) lines were cocultured with a promonocytic cell line in a Matrigel-based 3D system. We hypothesized that if communication exists between tumor and immune cells, coculturing would result in augmented expression of genes associated with tumor malignancy. Upregulation of proteases MMP1 and MMP9 and inflammatory COX2 genes was found likely in response to soluble factors. Interestingly, changes were more apparent in promonocytes and correlated with the aggressiveness of the BRC line. Increased gene expression was confirmed by collagen degradation assays and immunocytochemistry of prostaglandin 2, a product of COX2 activity. Untransformed MCF-10A cells were then used as a sensor of soluble factors with transformation-like capabilities, finding that acini formed in the presence of supernatants of the highly aggressive BRC/promonocyte cocultures often exhibited total loss of the normal architecture. These data support that tumor cells can modify immune cell gene expression and tumor aggressiveness may importantly reside in this capacity. Modeling interactions in the tumor stroma will allow the identification of genes useful as cancer prognostic markers and therapy targets. G. K. Chimal-Ramírez, N. A. Espinoza-Sánchez, D. Utrera-Barillas, L. Benítez-Bribiesca, J. R. Velázquez, L. A. Arriaga-Pizano, A. Monroy-García, E. Reyes-Maldonado, M. L. Domínguez-López, Patricia Piña-Sánchez, and E. M. Fuentes-Pananá Copyright © 2013 G. K. Chimal-Ramírez et al. All rights reserved. Moscatilin Inhibits Lung Cancer Cell Motility and Invasion via Suppression of Endogenous Reactive Oxygen Species Wed, 08 May 2013 14:51:56 +0000 http://www.hindawi.com/journals/bmri/2013/765894/ Lung cancer is the leading cause of death among cancer patients worldwide, and most of them have died from metastasis. Migration and invasion are prerequisite processes associated with high metastasis potential in cancers. Moscatilin, a bibenzyl derivative isolated from the Thai orchid Dendrobium pulchellum, has been shown to have anticancer effect against numerous cancer cell lines. However, little is known regarding the effect of moscatilin on cancer cell migration and invasion. The present study demonstrates that nontoxic concentrations of moscatilin were able to inhibit human nonsmall cell lung cancer H23 cell migration and invasion. The inhibitory effect of moscatilin was associated with an attenuation of endogenous reactive oxygen species (ROS), in which hydroxyl radical () was identified as a dominant species in the suppression of filopodia formation. Western blot analysis also revealed that moscatilin downregulated activated focal adhesion kinase (phosphorylated FAK, Tyr 397) and activated ATP-dependent tyrosine kinase (phosphorylated Akt, Ser 473), whereas their parental counterparts were not detectable changed. In conclusion, our results indicate the novel molecular basis of moscalitin-inhibiting lung cancer cell motility and invasion and demonstrate a promising antimetastatic potential of such an agent for lung cancer therapy. Akkarawut Kowitdamrong, Pithi Chanvorachote, Boonchoo Sritularak, and Varisa Pongrakhananon Copyright © 2013 Akkarawut Kowitdamrong et al. All rights reserved. Detection of Bovine Leukemia Virus in Brains of Cattle with a Neurological Syndrome: Pathological and Molecular Studies Sun, 28 Apr 2013 15:29:16 +0000 http://www.hindawi.com/journals/bmri/2013/425646/ Bovine leukemia virus (BLV) was investigated in the central nervous system (CNS) of cattle with neurological syndrome. A total of 269 CNS samples were submitted to nested-PCR (BLV env gene gp51), and the viral genotypes were identified. The nested-PCR was positive in 4.8% (13/269) CNS samples, with 2.7% (2/74) presenting at histological examination lesions of nonpurulent meningoencephalitis (NPME), whereas 5.6% (11/195) not presenting NPME (). No samples presented lymphosarcoma. The PCR products (437 bp) were sequenced and submitted to phylogenetic analysis by neighbor-joining and maximum composite likelihood methods, and genotypes 1, 5, and 6 were detected, corroborating other South American studies. The genotype 6 barely described in Brazil and Argentina was more frequently detected in this study. The identity matrices showed maximum similarity (100%) among some samples of this study and one from Argentina (FJ808582), recovered from GenBank. There was no association among the genotypes and NPME lesions. Rubens Henrique Ramos D’Angelino, Edviges Maristela Pituco, Eliana Monteforte Cassaro Villalobos, Ricardo Harakava, Fábio Gregori, and Claudia Del Fava Copyright © 2013 Rubens Henrique Ramos D’Angelino et al. All rights reserved. MicroRNA-124 Regulates the Proliferation of Colorectal Cancer Cells by Targeting iASPP Wed, 10 Apr 2013 10:59:14 +0000 http://www.hindawi.com/journals/bmri/2013/867537/ MicroRNAs are a class of small, noncoding RNAs that function as critical regulators of gene expression by targeting mRNAs for translational repression or degradation. In this study, we demonstrate that expression of microRNA-124 (miR-124) is significantly downregulated in colorectal cancer tissues and cell lines, compared to the matched adjacent tissues. We identified and confirmed inhibitor of apoptosis-stimulating protein of p53 (iASPP) as a novel, direct target of miR-124 using target prediction algorithms and luciferase reporter gene assays. Overexpression of miR-124 suppressed iASPP protein expression, upregulated expression of the downstream signaling molecule nuclear factor-kappa B (NF-κB), and attenuated cell viability, proliferation, and colony formation in SW480 and HT-29 colorectal cancer cells in vitro. Forced overexpression of iASPP partly rescued the inhibitory effect of miR-124 on SW480 and HT29 cell proliferation. Taken together, these findings shed light on the role and mechanism of action of miR-124, indicate that the miR-124/iASPP axis can regulate the proliferation of colorectal cancer cells, and suggest that miR-124 may serve as a potential therapeutic target for colorectal cancer. Kuijie Liu, Hua Zhao, Hongliang Yao, Sanlin Lei, Zhendong Lei, Tiegang Li, and Haizhi Qi Copyright © 2013 Kuijie Liu et al. All rights reserved. From Notochord Formation to Hereditary Chordoma: The Many Roles of Brachyury Sun, 31 Mar 2013 08:51:39 +0000 http://www.hindawi.com/journals/bmri/2013/826435/ Chordoma is a rare, but often malignant, bone cancer that preferentially affects the axial skeleton and the skull base. These tumors are both sporadic and hereditary and appear to occur more frequently after the fourth decade of life; however, modern technologies have increased the detection of pediatric chordomas. Chordomas originate from remnants of the notochord, the main embryonic axial structure that precedes the backbone, and share with notochord cells both histological features and the expression of characteristic genes. One such gene is Brachyury, which encodes for a sequence-specific transcription factor. Known for decades as a main regulator of notochord formation, Brachyury has recently gained interest as a biomarker and causative agent of chordoma, and therefore as a promising therapeutic target. Here, we review the main characteristics of chordoma, the molecular markers, and the clinical approaches currently available for the early detection and possible treatment of this cancer. In particular, we report on the current knowledge of the role of Brachyury and of its possible mechanisms of action in both notochord formation and chordoma etiogenesis. Yutaka Nibu, Diana S. José-Edwards, and Anna Di Gregorio Copyright © 2013 Yutaka Nibu et al. All rights reserved. Hereditary Breast Cancer: The Era of New Susceptibility Genes Thu, 21 Mar 2013 15:05:34 +0000 http://www.hindawi.com/journals/bmri/2013/747318/ Breast cancer is the most common malignancy among females. 5%–10% of breast cancer cases are hereditary and are caused by pathogenic mutations in the considered reference BRCA1 and BRCA2 genes. As sequencing technologies evolve, more susceptible genes have been discovered and BRCA1 and BRCA2 predisposition seems to be only a part of the story. These new findings include rare germline mutations in other high penetrant genes, the most important of which include TP53 mutations in Li-Fraumeni syndrome, STK11 mutations in Peutz-Jeghers syndrome, and PTEN mutations in Cowden syndrome. Furthermore, more frequent, but less penetrant, mutations have been identified in families with breast cancer clustering, in moderate or low penetrant genes, such as CHEK2, ATM, PALB2, and BRIP1. This paper will summarize all current data on new findings in breast cancer susceptibility genes. Paraskevi Apostolou and Florentia Fostira Copyright © 2013 Paraskevi Apostolou and Florentia Fostira. All rights reserved. The Role of MicroRNAs in Cancer Susceptibility Tue, 19 Mar 2013 15:06:51 +0000 http://www.hindawi.com/journals/bmri/2013/591931/ Single nucleotide polymorphisms (SNPs) are germline variations interspersed in the human genome. These subtle changes of DNA sequence can influence the susceptibility to various pathologies including cancer. The functional meaning of SNPs is not always clear, being, the majority of them, localized in noncoding regions. The discovery of microRNAs, tiny noncoding RNAs able to bind the 3′ untranslated region (UTR) of target genes and to consequently downregulate their expression, has provided a functional explanation of how some SNPs positioned in noncoding regions contribute to cancer susceptibility. In this paper we summarize the current knowledge of the effect on cancer susceptibility of SNPs included in regions related with miRNA-dependent pathways. Hereditary cancer comes up from mutations that occur in high-penetrant predisposing tumor genes. However, a considerable part of inherited cancers arises from multiple low-penetrant predisposing gene variants that influence the behavior of cancer insurgence. Despite the established significance of such polymorphic variants in cancer predisposition, sometimes their functional role remains unknown. The discovery of a new group of genes called microRNAs (miRNAs) opened an avenue for the functional interpretation of polymorphisms involved in cancer predisposition. Rodolfo Iuliano, Marco Flavio Michele Vismara, Vincenzo Dattilo, Francesco Trapasso, Francesco Baudi, and Nicola Perrotti Copyright © 2013 Rodolfo Iuliano et al. All rights reserved. Ubiquitin Ligase Cbl-b Is Involved in Icotinib (BPI-2009H)-Induced Apoptosis and G1 Phase Arrest of EGFR Mutation-Positive Non-Small-Cell Lung Cancer Tue, 19 Mar 2013 12:58:14 +0000 http://www.hindawi.com/journals/bmri/2013/726375/ Epidermal growth factor receptor (EGFR) is one of the most promising targets for non-small-cell lung cancer (NSCLC). Icotinib, a highly selective EGFR tyrosine kinase inhibitor (EGFR-TKI), has shown promising clinical efficacy and safety in patients with NSCLC. The exact molecular mechanism of icotinib remains unclear. In this study, we first investigated the antiproliferative effect of icotinib on NSCLC cells. Icotinib significantly inhibited proliferation of the EGFR-mutated lung cancer HCC827 cells. The IC50 values at 48 and 72 h were 0.67 and 0.07 μM, respectively. Flow cytometric analysis showed that icotinib caused the G1 phase arrest and increased the rate of apoptosis in HCC827 cells. The levels of cyclin D1 and cyclin A2 were decreased. The apoptotic process was associated with activation of caspase-3, -8, and poly(ADP-ribose) polymerase (PARP). Further study revealed that icotinib inhibited phosphorylation of EGFR, Akt, and extracellular signal-regulated kinase. In addition, icotinib upregulated ubiquitin ligase Cbl-b expression. These observations suggest that icotinib-induced upregulation of Cbl-b is responsible, at least in part, for the antitumor effect of icotinib via the inhibition of phosphoinositide 3-kinase (PI3K)/Akt and mitogen-activated protein kinase pathways in EGFR-mutated NSCLC cells. Xiaodong Mu, Ye Zhang, Xiujuan Qu, Kezuo Hou, Jian Kang, Xuejun Hu, and Yunpeng Liu Copyright © 2013 Xiaodong Mu et al. All rights reserved. Natural Oncolytic Activity of Live-Attenuated Measles Virus against Human Lung and Colorectal Adenocarcinomas Sun, 17 Mar 2013 14:54:13 +0000 http://www.hindawi.com/journals/bmri/2013/387362/ Lung and colorectal cancers are responsible for approximately 2 million deaths each year worldwide. Despite continual improvements, clinical management of these diseases remains challenging and development of novel therapies with increased efficacy is critical to address these major public health issues. Oncolytic viruses have shown promising results against cancers that are resistant to conventional anticancer therapies. Vaccine strains of measles virus (MV) exhibit such natural antitumor properties by preferentially targeting cancer cells. We tested the ability of live-attenuated Schwarz strain of MV to specifically infect tumor cells derived from human lung and colorectal adenocarcinomas and demonstrated that live-attenuated MV exhibits oncolytic properties against these two aggressive neoplasms. We also showed that Schwarz MV was able to prevent uncontrollable growth of large, established lung and colorectal adenocarcinoma xenografts in nude mice. Moreover, MV oncolysis is associated with in vivo activation of caspase-3 in colorectal cancer model, as shown by immunohistochemical staining. Our results provide new arguments for the use of MV as an antitumor therapy against aggressive human malignancies. Nicolas Boisgerault, Jean-Baptiste Guillerme, Daniel Pouliquen, Mariana Mesel-Lemoine, Carole Achard, Chantal Combredet, Jean-François Fonteneau, Frédéric Tangy, and Marc Grégoire Copyright © 2013 Nicolas Boisgerault et al. All rights reserved. Vitronectin Absorbed on Nanoparticles Mediate Cell Viability/Proliferation and Uptake by 3T3 Swiss Albino Mouse Fibroblasts: In Vitro Study Thu, 28 Feb 2013 11:07:51 +0000 http://www.hindawi.com/journals/bmri/2013/539348/ We study the interaction of 3T3 Swiss albino mouse fibroblasts with polymeric nanoparticles (NPs) and investigate cellular behaviour in terms of viability/cytotoxicity, cell cycle, NPs uptake, MAP kinase (ERK1/2), and focal adhesion kinase (FAK) activation. After incubation of NPs with cell culture media, western blot analysis showed that Vitronectin is retained by NPs, while Fibronectin is not detected. From cytotoxicity studies (MTT and BrdU methods) an LD50 of about 1.5 mg/mL results for NPs. However, NPs in the range 0.01–0.30 mg/mL are able to trigger a statistically significant increase in proliferation and cell cycle progression in dose and time depending manner. Also, biochemical evaluation of ERK1/2 and FAK clearly shows an increasing phosphorylation in a dose and time depending manner. Finally, we found by transmission electron microscopy that NPs are internalised by cells. Competitively blocking VN-integrin receptors with echistatin (1 g/mL) results in a decrease of viability/proliferation, cell cycle progression, cellular uptake, and FAK/ERK activation showing the involvement of Vitronectin receptors in signal transduction. In conclusion, our results show that cell surface NPs interactions are mediated by absorbed plasma proteins (i.e., Vitronectin) that represent an external stimuli, switched to the nucleus by FAK enzyme, which in turn modulate fibroblasts viability/proliferation. F. Rosso, G. Marino, A. Grimaldi, G. Cafiero, E. Chiellini, F. Chiellini, M. Barbarisi, and A. Barbarisi Copyright © 2013 F. Rosso et al. All rights reserved. Mitochondria and Cancer Wed, 30 Jan 2013 16:02:41 +0000 http://www.hindawi.com/journals/bmri/2013/763703/ Ryan Parr, Andrew Harbottle, John P. Jakupciak, and Gurmit Singh Copyright © 2013 Ryan Parr et al. All rights reserved. Mitochondria and Cancer: Past, Present, and Future Mon, 28 Jan 2013 11:53:27 +0000 http://www.hindawi.com/journals/bmri/2013/612369/ The area of mitochondrial genomics has undergone unprecedented growth over the past several years. With the advent of the age of omics, investigations have reached beyond the nucleus to encompass the close biological communication and finely coordinated interactions between mitochondria and their nuclear cell mate. Application of this holistic approach, to all metabolic interactions within the cell, is providing a more complete understanding of the molecular transformation of the cell from normal to malignant behavior, before histopathological indications are evident. In this review the surging momentum in mitochondrial science, as it relates to cancer, is described in three progressive perspectives: (1) Past: the historical contributions to current directions of research; (2) Present: Contemporary findings, results and approaches to mitochondria and cancer, including the role of next generation sequencing and proteomics; (3) Future: Based on the present body of knowledge, the potential assets and benefits of mitochondrial research are projected into the near future. M. L. Verschoor, R. Ungard, A. Harbottle, J. P. Jakupciak, R. L. Parr, and G. Singh Copyright © 2013 M. L. Verschoor et al. All rights reserved. Contribution of Large Genomic Rearrangements in Italian Lynch Syndrome Patients: Characterization of a Novel Alu-Mediated Deletion Sun, 30 Dec 2012 14:11:32 +0000 http://www.hindawi.com/journals/bmri/2013/219897/ Lynch syndrome is associated with germ-line mutations in the DNA mismatch repair (MMR) genes, mainly MLH1 and MSH2. Most of the mutations reported in these genes to date are point mutations, small deletions, and insertions. Large genomic rearrangements in the MMR genes predisposing to Lynch syndrome also occur, but the frequency varies depending on the population studied on average from 5 to 20%. The aim of this study was to examine the contribution of large rearrangements in the MLH1 and MSH2 genes in a well-characterised series of 63 unrelated Southern Italian Lynch syndrome patients who were negative for pathogenic point mutations in the MLH1, MSH2, and MSH6 genes. We identified a large novel deletion in the MSH2 gene, including exon 6 in one of the patients analysed (1.6% frequency). This deletion was confirmed and localised by long-range PCR. The breakpoints of this rearrangement were characterised by sequencing. Further analysis of the breakpoints revealed that this rearrangement was a product of Alu-mediated recombination. Our findings identified a novel Alu-mediated rearrangement within MSH2 gene and showed that large deletions or duplications in MLH1 and MSH2 genes are low-frequency mutational events in Southern Italian patients with an inherited predisposition to colon cancer. Francesca Duraturo, Angela Cavallo, Raffaella Liccardo, Bianca Cudia, Marina De Rosa, Giuseppe Diana, and Paola Izzo Copyright © 2013 Francesca Duraturo et al. All rights reserved. Simultaneous Quantification of Mitochondrial DNA Damage and Copy Number in Circulating Blood: A Sensitive Approach to Systemic Oxidative Stress Thu, 27 Dec 2012 19:04:13 +0000 http://www.hindawi.com/journals/bmri/2013/157547/ Systemic oxidative stress is associated with a wide range of pathological conditions. Oxidative DNA damage is frequently measured in circulating lymphocytes. Mitochondrial DNA (mtDNA) is known to be more sensitive to oxidative damage than nuclear DNA but is rarely used for direct measurement of DNA damage in clinical studies. Based on the supercoiling-sensitive real-time PCR method, we propose a new approach for the noninvasive monitoring of systemic oxidative stress by quantifying the mtDNA structural damage and copy number change in isolated lymphocytes in a single test. We show that lymphocytes have significantly less mtDNA content and relatively lower baseline levels of damage than cancer cell lines. In an ex vivo challenge experiment, we demonstrate, for the first time, that exogenous H2O2 induces a significant increase in mtDNA damage in lymphocytes from healthy individuals, but no repair activity is observed after 1 h recovery. We further demonstrate that whole blood may serve as a convenient alternative to the isolated lymphocytes in mtDNA analysis. Thus, the blood analysis with the multiple mtDNA end-points proposed in the current study may provide a simple and sensitive test to interrogate the nature and extent of systemic oxidative stress for a broad spectrum of clinical investigations. Sam W. Chan, Simone Chevalier, Armen Aprikian, and Junjian Z. Chen Copyright © 2013 Sam W. Chan et al. All rights reserved. An Inherited Heteroplasmic Mutation in Mitochondrial Gene COI in a Patient with Prostate Cancer Alters Reactive Oxygen, Reactive Nitrogen and Proliferation Thu, 27 Dec 2012 17:17:43 +0000 http://www.hindawi.com/journals/bmri/2013/239257/ Mitochondrial DNA (mtDNA) mutations have been found in many cancers but the physiological derangements caused by such mutations have remained elusive. Prostate cancer is associated with both inherited and somatic mutations in the cytochrome c oxidase (COI) gene. We present a prostate cancer patient-derived rare heteroplasmic mutation of this gene, part of mitochondrial respiratory complex IV. Functional studies indicate that this mutation leads to the simultaneous decrease in cytochrome oxidation, increase in reactive oxygen, and increased reactive nitrogen. These data suggest that mitochondrial DNA mutations resulting in increased reactive oxygen and reactive nitrogen generation may be involved in prostate cancer biology. Rebecca S. Arnold, Qian Sun, Carrie Q. Sun, Jendai C. Richards, Sean O'Hearn, Adeboye O. Osunkoya, Douglas C. Wallace, and John A. Petros Copyright © 2013 Rebecca S. Arnold et al. All rights reserved. Paired Ductal Carcinoma In Situ and Invasive Breast Cancer Lesions in the D-Loop of the Mitochondrial Genome Indicate a Cancerization Field Effect Wed, 26 Dec 2012 15:15:00 +0000 http://www.hindawi.com/journals/bmri/2013/379438/ Alterations in the mitochondrial genome have been chronicled in most solid tumors, including breast cancer. The intent of this paper is to compare and document somatic mitochondrial D-loop mutations in paired samples of ductal carcinoma in situ (DCIS) and invasive breast cancer (IBC) indicating a potential breast ductal epithelial cancerization field effect. Paired samples of these histopathologies were laser-captured microdissected (LCM) from biopsy, lumpectomy, and mastectomy tissues. Blood samples were collected as germplasm control references. For each patient, hypervariable region 1 (HV1) in the D-loop portion of the mitochondrial genome (mtGenome) was sequenced for all 3 clinical samples. Specific parallel somatic heteroplasmic alterations between these histopathologies, particularly at sites 16189, 16223, 16224, 16270, and 16291, suggest the presence of an epithelial, mitochondrial cancerization field effect. These results indicate that further characterization of the mutational pathway of DCIS and IBC may help establish the invasive potential of DCIS. Moreover, this paper indicates that biofluids with low cellularity, such as nipple aspirate fluid and/or ductal lavage, warrant further investigation as early and minimally invasive detection mediums of a cancerization field effect within breast tissue. Andrea Maggrah, Kerry Robinson, Jennifer Creed, Roy Wittock, Ken Gehman, Teresa Gehman, Helen Brown, Andrew Harbottle, M. Kent Froberg, Daniel Klein, Brian Reguly, and Ryan Parr Copyright © 2013 Andrea Maggrah et al. All rights reserved. History, Pathogenesis, and Management of Familial Gastric Cancer: Original Study of John XXIII's Family Wed, 26 Dec 2012 14:31:11 +0000 http://www.hindawi.com/journals/bmri/2013/385132/ Background. Hereditary diffuse gastric cancer is associated with the E-cadherin germline mutations, but genetic determinants have not been identified for familial intestinal gastric carcinoma. The guidelines for hereditary diffuse gastric cancer are clearly established; however, there are no defined recommendations for the management of familial intestinal gastric carcinoma. Methods. In this study we describe Pope John XXIII's pedigree that harboured gastric cancer as well as six other family members. Family history was analysed according to the International Gastric Cancer Linkage Consortium criteria, and gastric tumours were classified in accord with the last Japanese guidelines. Results. Seven out of 109 members in this pedigree harboured gastric cancer, affecting two consecutive generations. John XXIII's clinical tumour (cTN) was classified as cT4bN3a (IV stage). In two other cases, gastric carcinomas were classified as intestinal histotype and staged as pT1bN0 and pT2N2, respectively. Conclusions. Pope John XXIII's family presents a strong aggregation for gastric cancer affecting almost seven members; it spreads through two consecutive generations. In absence of defined genetic causes and considering the increased risk of gastric cancer’s development in these families, as well as the high mortality rates and advanced stages, we propose an intensive surveillance protocol for asymptomatic members. Giovanni Corso, Fabrizio Roncalli, Daniele Marrelli, Fátima Carneiro, and Franco Roviello Copyright © 2013 Giovanni Corso et al. All rights reserved. Oxidative Stress Induces Mitochondrial DNA Damage and Cytotoxicity through Independent Mechanisms in Human Cancer Cells Wed, 26 Dec 2012 12:22:21 +0000 http://www.hindawi.com/journals/bmri/2013/825065/ Intrinsic oxidative stress through increased production of reactive oxygen species (ROS) is associated with carcinogenic transformation, cell toxicity, and DNA damage. Mitochondrial DNA (mtDNA) is a natural surrogate to oxidative DNA damage. MtDNA damage results in the loss of its supercoiled structure and is readily detectable using a novel, supercoiling-sensitive real-time PCR method. Our studies have demonstrated that mtDNA damage, as measured by DNA strand breaks and copy number depletion, is very sensitive to exogenous H2O2 but independent of endogenous ROS production in both prostate cancer and normal cells. In contrast, aggressive prostate cancer cells exhibit a more than 10-fold sensitivity to H2O2-induced cell toxicity than normal cells, and a cascade of secondary ROS production is a critical determinant to the differential response. We propose a new paradigm to account for different mechanisms governing cellular oxidative stress, cell toxicity, and DNA damage with important ramifications in devising new techniques and strategies in prostate cancer prevention and treatment. Yue Han and Junjian Z. Chen Copyright © 2013 Yue Han and Junjian Z. Chen. All rights reserved. p55PIK Transcriptionally Activated by MZF1 Promotes Colorectal Cancer Cell Proliferation Sun, 23 Dec 2012 11:00:41 +0000 http://www.hindawi.com/journals/bmri/2013/868131/ p55PIK, regulatory subunit of class IA phosphatidylinositol 3-kinase (PI3K), plays a crucial role in cell cycle progression by interaction with tumor repressor retinoblastoma (Rb) protein. A recent study showed that Rb protein can localize to the mitochondria in proliferative cells. Aberrant p55PIK expression may contribute to mitochondrial dysfunction in cancer progression. To reveal the mechanisms of p55PIK transcriptional regulation, the p55PIK promoter characteristics were analyzed. The data show that myeloid zinc finger 1, MZF1, is necessary for p55PIK gene transcription activation. ChIP (Chromatin immuno-precipitation) assay shows that MZF1 binds to the cis-element “TGGGGA” in p55PIK promoter. In MZF1 overexpressed cells, the promoter activity, expression of p55PIK, and cell proliferation rate were observed to be significantly enhanced. Whereas in MZF1-silenced cells, the promoter activity and expression of p55PIK and cell proliferation level was statistically decreased. In CRC tissues, MZF1 and p55PIK mRNA expression were increased (, , resp.). A strong positive correlation () between MZF1 and p55PIK mRNA expression was observed. Taken together, we concluded that p55PIK is transcriptionally activated by MZF1, resulting in increased proliferation of colorectal cancer cells. Yu Deng, Jing Wang, Guihua Wang, Yuan Jin, Xuelai Luo, Xianmin Xia, Jianping Gong, and Junbo Hu Copyright © 2013 Yu Deng et al. All rights reserved. Downregulation of DLC-1 Gene by Promoter Methylation during Primary Colorectal Cancer Progression Sun, 23 Dec 2012 10:35:06 +0000 http://www.hindawi.com/journals/bmri/2013/181384/ Purpose. DLC-1 is a tumor suppressor gene frequently silenced in human cancers. However, the pathogenicity of DLC-1 epigenetic silencing in the mucosa-adenoma-carcinoma transformation process of colorectal cancer (CRC) has not been studied. Methods. Promoter methylation status of DLC-1 was evaluated in 4 human CRC cell lines, 48 normal mucosa, 57 adenomas, and 80 CRC tissues with methylation-sensitive high-resolution melting analysis (MS-HRMA), while the mRNA expression was examined by qPCR. HRMA was utilized to detect the KRAS codon 12, 13 and BRAF V600Emutations. Results. Partial (1%–10%) and extensive (10%–100%) DLC-1 promoter methylations were observed in 10% and 0% of normal mucosa, 46% and 14% of adenomas, and 60% and 36% of CRCs, respectively. The promoter methylation of DLC-1 was related with the reduction of gene expression and the advanced Duke’s stages (Stage C and D). DLC-1 promoter methylation and KRAS mutations are common concurrent pathological alternations. Conclusions. Epigenetic alternation plays a key role in the transcriptional silencing of DLC-1. It is also an independent risk factor related to the carcinogenesis of colorectal tumors and spans over its pathogenesis process. Therefore, DLC-1 promoter methylation quantitation may have a promising significance in the evaluation and management of CRC patients. Haixia Peng, Feng Long, Zhiyuan Wu, Yimin Chu, Ji Li, Rong Kuai, Jing Zhang, Zhihua Kang, Xinju Zhang, and Ming Guan Copyright © 2013 Haixia Peng et al. All rights reserved. Microenvironment and Radiation Therapy Tue, 04 Dec 2012 16:30:43 +0000 http://www.hindawi.com/journals/bmri/2013/685308/ Dependency on tumor oxygenation is one of the major features of radiation therapy and this has led many radiation biologists and oncologists to focus on tumor hypoxia. The first approach to overcome tumor hypoxia was to improve tumor oxygenation by increasing oxygen delivery and a subsequent approach was the use of radiosensitizers in combination with radiation therapy. Clinical use of some of these approaches was promising, but they are not widely used due to several limitations. Hypoxia-inducible factor 1 (HIF-1) is a transcription factor that is activated by hypoxia and induces the expression of various genes related to the adaptation of cellular metabolism to hypoxia, invasion and metastasis of cancer cells and angiogenesis, and so forth. HIF-1 is a potent target to enhance the therapeutic effects of radiation therapy. Another approach is antiangiogenic therapy. The combination with radiation therapy is promising, but several factors including surrogate markers, timing and duration, and so forth have to be optimized before introducing it into clinics. In this review, we examined how the tumor microenvironment influences the effects of radiation and how we can enhance the antitumor effects of radiation therapy by modifying the tumor microenvironment. Michio Yoshimura, Satoshi Itasaka, Hiroshi Harada, and Masahiro Hiraoka Copyright © 2013 Michio Yoshimura et al. All rights reserved. Overexpression of Runt-Related Transcription Factor-2 Is Associated with Advanced Tumor Progression and Poor Prognosis in Epithelial Ovarian Cancer Thu, 04 Oct 2012 08:24:19 +0000 http://www.hindawi.com/journals/bmri/2012/456534/ Aim. To investigate clinical significance of runt-related transcription factor (RUNX)-2 in epithelial ovarian cancer (EOC). Methods. RUNX2 protein expression and its subcellular localization were detected by immunohistochemistry in 116 patients with EOC. Results. RUNX2 protein was predominantly expressed in cell nucleus of EOC tissues. The expression level of RUNX2 in EOC tissues was significantly higher than that in normal ovarian tissues (𝑃<0.001). In addition, the nuclear labeling index (LI) of RUNX2 in tumor cells was significantly associated with the advanced clinical stage of EOC tissues (𝑃=0.001). Moreover, EOC patients with high RUNX2 LI had significantly shorter overall (𝑃<0.001) and progression-free (𝑃=0.002) survival than those with low RUNX2 LI. Especially, subgroup analysis revealed that EOC patients with high clinical stages (III~IV) in high RUNX2 expression group demonstrated a significantly worse clinical outcome than those in low RUNX2 expression group, but patients with low clinical stages (I~II) had no significantly different prognosis between high and low RUNX2 expression groups. Conclusions. Our data suggest for the first time that RUNX2 overexpression is associated with advanced tumor progression and poor clinical outcome of EOC patients. RUNX2 might be a novel prognostic marker of EOC. Weiping Li, Shujuan Xu, Shuang Lin, and Wei Zhao Copyright © 2012 Weiping Li et al. All rights reserved. Bone Marrow Microenvironment in Multiple Myeloma Progression Wed, 03 Oct 2012 08:13:31 +0000 http://www.hindawi.com/journals/bmri/2012/157496/ Substantial advances have been made in understanding the biology of multiple myeloma (MM) through the study of the bone marrow (BM) microenvironment. Indeed, the BM niche appears to play an important role in differentiation, migration, proliferation, survival, and drug resistance of the malignant plasma cells. The BM niche is composed of a cellular compartment (stromal cells, osteoblasts, osteoclasts, endothelial cells, and immune cells) and a noncellular compartment including the extracellular matrix (ECM) and the liquid milieu (cytokines, growth factors, and chemokines). In this paper we discuss how the interaction between the malignant plasma cell and the BM microenvironment allowed myeloma progression through cell homing and the new concept of premetastatic niche. S. Manier, A. Sacco, X. Leleu, I. M. Ghobrial, and A. M. Roccaro Copyright © 2012 S. Manier et al. All rights reserved. Induction of Apoptosis and Cell Cycle Arrest in Human Colorectal Carcinoma by Litchi Seed Extract Wed, 03 Oct 2012 08:11:56 +0000 http://www.hindawi.com/journals/bmri/2012/341479/ The Litchi (Litchi chinensis) fruit products possess rich amounts of flavanoids and proanthocyanidins. Its pericarp has been shown to inhibit breast and liver cancer cell growth. However, the anticolorectal cancer effect of Litchi seed extract has not yet been reported. In this study, the effects of polyphenol-rich Litchi seed ethanol extract (LCSP) on the proliferation, cell cycle, and apoptosis of two colorectal cancer cell lines Colo320DM and SW480 were examined. The results demonstrated that LCSP significantly induced apoptotic cell death in a dose-dependent manner and arrested cell cycle in G2/M in colorectal carcinoma cells. LCSP also suppressed cyclins and elevated the Bax : Bcl-2 ratio and caspase 3 activity. This study provides in vitro evidence that LCSP serves as a potential chemopreventive agent for colorectal cancer. Chih-Ping Hsu, Chih-Cheng Lin, Chiu-Chen Huang, Yi-Hsien Lin, Jyh-Ching Chou, Yu-Ting Tsia, Jhih-Rou Su, and Yuan-Chiang Chung Copyright © 2012 Chih-Ping Hsu et al. All rights reserved. Evaluation of Mammary Cancer in 7,12-Dimethylbenz(a)anthracene-Induced Wister Rats by Asymmetrical Temperature Distribution Analysis Using Thermography: A Comparison with Serum CEA Levels and Histopathology Tue, 02 Oct 2012 14:54:46 +0000 http://www.hindawi.com/journals/bmri/2012/786417/ Animal surface temperature profile captured using infrared camera is helpful for the assessment of physiological responses associated with the regulation of body temperature. Diagnosing breast cancer in early stage itself has a greater effect on the prognosis. In this work, asymmetrical temperature distribution analysis of chemical carcinogen 7,12-dimethyl benz(a)anthracene-induced in the lower right flank region of Wistar rats (𝑛=6) was carried out to test the potential of thermography in diagnosing mammary cancer and tumor growth over a period of nine weeks in comparison with histopathology results as standard. Temperature difference between the tumor induced lower right and left side of flank region was significant (with P value <0.001), whereas in the abdomen and shoulder there was no significant difference in temperature between right and left sides. Percentage of asymmetrical temperature difference in the tumor induced lower flank region was 0.5 to 2%, whereas in the other regions it was <0.5%. Green pixel distribution in RGB color histogram was asymmetrical in the tumor induced lower flank region. Temperature reduction was observed in the tumor induced region after the seventh day of carcinogen induction. Asymmetrical thermogram analysis is the best method of diagnosing mammary cancer and for studying tumor development. S. P. Angeline Kirubha, M. Anburajan, B. Venkataraman, R. Akila, D. Sharath, and Baldev Raj Copyright © 2012 S. P. Angeline Kirubha et al. All rights reserved. Depigmenting Effect of Kojic Acid Esters in Hyperpigmented B16F1 Melanoma Cells Tue, 02 Oct 2012 12:24:47 +0000 http://www.hindawi.com/journals/bmri/2012/952452/ The depigmenting effect of kojic acid esters synthesized by the esterification of kojic acid using Rhizomucor miehei immobilized lipase was investigated in B16F1 melanoma cells. The depigmenting effect of kojic acid and kojic acid esters was evaluated by the inhibitory effect of melanin formation and tyrosinase activity on alpha-stimulating hormone- (α-MSH-) induced melanin synthesis in B16F1 melanoma cells. The cellular tyrosinase inhibitory effect of kojic acid monooleate, kojic acid monolaurate, and kojic acid monopalmitate was found similar to kojic acid at nontoxic doses ranging from 1.95 to 62.5 μg/mL. However, kojic acid monopalmitate gave slightly higher inhibition to melanin formation compared to other inhibitors at doses ranging from 15.63 to 62.5 μg/mL. Kojic acid and kojic acid esters also show antioxidant activity that will enhance the depigmenting effect. The cytotoxicity of kojic acid esters in B16F1 melanoma cells was significantly lower than kojic acid at high doses, ranging from 125 and 500 μg/mL. Since kojic acid esters have lower cytotoxic effect than kojic acid, it is suggested that kojic acid esters can be used as alternatives for a safe skin whitening agent and potential depigmenting agents to treat hyperpigmentation. Ahmad Firdaus B. Lajis, Muhajir Hamid, and Arbakariya B. Ariff Copyright © 2012 Ahmad Firdaus B. Lajis et al. All rights reserved. Cancer Chemoprevention Mon, 24 Sep 2012 15:09:37 +0000 http://www.hindawi.com/journals/bmri/2012/250491/ Amr Amin, Metka Filipič, Su S. Chen, and Regine Schneider-Stock Copyright © 2012 Amr Amin et al. All rights reserved. On Enzyme-Based Anticancer Molecular Dietary Manipulations Thu, 20 Sep 2012 09:36:37 +0000 http://www.hindawi.com/journals/bmri/2012/790987/ Evidence from both epidemiological and experimental observations has fuelled the belief that the high consumption of fruits and vegetables rich in nutrients and phytochemicals may help prevent cancer and heart disease in humans. This concept has been drastically simplified from the dietary approaches to the use of single bioactive components both as a single supplement or in functional foods to manipulate xenobiotic metabolism. These procedures, which aim to induce mutagen/carcinogen detoxification or inhibit their bioactivation, fail to take into account the multiple and paradoxical biological outcomes of enzyme modulators that make their effects unpredictable. Here, we show that the idea that the physiological roles of specific catalysts may be easily manipulated by regular long-term administration of isolated nutrients and other chemicals derived from food plants is not viable. In contrast, we claim that the consumption of healthy diets is most likely to reduce mutagenesis and cancer risk, and that both research endeavours and dietary recommendations should be redirected away from single molecules to dietary patterns as a main strategy for public health policy. Andrea Sapone, Donatella Canistro, Simone Melega, Ramona Moles, Fabio Vivarelli, and Moreno Paolini Copyright © 2012 Andrea Sapone et al. All rights reserved. Differential Control of Growth, Apoptotic Activity, and Gene Expression in Human Breast Cancer Cells by Extracts Derived from Medicinal Herbs Zingiber officinale Sun, 26 Aug 2012 10:01:30 +0000 http://www.hindawi.com/journals/bmri/2012/614356/ The present study aimed to examine the antiproliferative potentiality of an extract derived from the medicinal plant ginger (Zingiber officinale) on growth of breast cancer cells. Ginger treatment suppressed the proliferation and colony formation in breast cancer cell lines, MCF-7 and MDA-MB-231. Meanwhile, it did not significantly affect viability of nontumorigenic normal mammary epithelial cell line (MCF-10A). Treatment of MCF-7 and MDA-MB-231 with ginger resulted in sequences of events marked by apoptosis, accompanied by loss of cell viability, chromatin condensation, DNA fragmentation, activation of caspase 3, and cleavage of poly(ADP-ribose) polymerase. At the molecular level, the apoptotic cell death mediated by ginger could be attributed in part to upregulation of Bax and downregulation of Bcl-2 proteins. Ginger treatment downregulated expression of prosurvival genes, such as NF-κB, Bcl-X, Mcl-1, and Survivin, and cell cycle-regulating proteins, including cyclin D1 and cyclin-dependent kinase-4 (CDK-4). On the other hand, it increased expression of CDK inhibitor, p21. It also inhibited the expression of the two prominent molecular targets of cancer, c-Myc and the human telomerase reverse transcriptase (hTERT). These findings suggested that the ginger may be a promising candidate for the treatment of breast carcinomas. Ayman I. Elkady, Osama A. Abuzinadah, Nabih A. Baeshen, and Tarek R. Rahmy Copyright © 2012 Ayman I. Elkady et al. All rights reserved. Alterations of the TP53 Gene in Gastric and Esophageal Carcinogenesis Tue, 07 Aug 2012 07:44:32 +0000 http://www.hindawi.com/journals/bmri/2012/891961/ TP53 genes is one of more important tumor suppressor gene, which acts as a potent transcription factor with fundamental role in the maintenance of genetic stability. The development of esophageal and gastric cancers is a multistep process resulting in successive accumulation of genetic alterations that culminates in the malignant transformation. Thus, this study highlights the participation of the main genetic alterations of the TP53 gene in esophageal and gastric carcinogenesis. Among these changes, high frequency of TP53 mutations, loss of heterozygosity (LOH), overexpression of the p53 protein, and consequently loss of p53 function, which would be early events in esophageal and gastric cancers, as well as an important biomarker of the prognosis and treatment response. Furthermore, Single Nucleotide Polymorphisms (SNPs) of TP53 have been implicated in the development and prognosis of several cancers, mainly TP53 codon 72 polymorphism whose role has been extensively studied in relation to susceptibility for esophageal and gastric cancer development. Marilanda Ferreira Bellini, Aline Cristina Targa Cadamuro, Maysa Succi, Marcela Alcântara Proença, and Ana Elizabete Silva Copyright © 2012 Marilanda Ferreira Bellini et al. All rights reserved. TP53 Mutation, Epithelial-Mesenchymal Transition, and Stemlike Features in Breast Cancer Subtypes Mon, 30 Jul 2012 10:39:58 +0000 http://www.hindawi.com/journals/bmri/2012/254085/ Altered p53 protein is prevalently associated with the pathologic class of triple-negative breast cancers and loss of p53 function has recently been linked to the induction of an epithelial-mesenchymal transition (EMT) and acquisition of stemness properties. We explored the association between TP53 mutational status and expression of some genes involved in the canonical TGF-β signaling pathway (the most potent EMT inducer) and in two early EMT associated events: loss of cell polarity and acquisition of stemness-associated features. We used a publicly accessible microarray dataset consisting of 251 p53-sequenced primary breast cancers. Statistical analysis indicated that mutant p53 tumors (especially those harboring a severe mutation) were consistent with the aggressive class of triple-negative cancers and that, differently from cell cultures, surgical tumors underexpressed some TGF-β related transcription factors known as involved in EMT (ID1, ID4, SMAD3, SMAD4, SMAD5, ZEB1). These unexpected findings suggest an interesting relationship between p53 mutation, mammary cell dedifferentiation, and the concomitant acquisition of stemlike properties (as indicated by the overexpression of PROM1 and NOTCH1 genes), which improve tumor cells aggressiveness as indicated by the overexpression of genes associated with cell proliferation (CDK4, CDK6, MKI67) and migration (CXCR4, MMP1). Danila Coradini, Marco Fornili, Federico Ambrogi, Patrizia Boracchi, and Elia Biganzoli Copyright © 2012 Danila Coradini et al. All rights reserved. A Limited Role of p53 on the Ability of a Hexane Fraction of American Ginseng to Suppress Mouse Colitis Mon, 30 Jul 2012 10:02:11 +0000 http://www.hindawi.com/journals/bmri/2012/785739/ Ulcerative colitis (UC) is debilitating and carries a high colon cancer risk. Apoptosis of inflammatory cells is a key mechanism regulating UC. We have recently shown that American ginseng (AG), and to a greater extent, a Hexane fraction of AG (HAG) can cause apoptosis and suppress mouse colitis through a p53-mediated mechanism. Here, we tested the hypothesis that HAG suppresses colitis through a p53 mechanism. We found only a limited impact of p53 in the ability of HAG to induce inflammatory cell apoptosis and suppress mouse colitis in vitro and in vivo. Finally, we asked whether HAG could cause cell cycle arrest of HCT116 colon cancer cells in vitro. Interestingly, HAG caused a G1 arrest of such cells independent of p53 status. Findings are significant because HAG suppresses colitis and associated colon cancer, and mutation in p53 is observed in most colitis-driven colon cancers. Therefore, HAG might be very effective in targeting the inflammatory cells and cancer cells since it induces apoptosis of inflammatory cells and cell cycle arrest in both p53−/− and WT p53 colon cancer cells. Deepak Poudyal, Xiangli Cui, Phuong Mai Le, Tia Davis, Anne B. Hofseth, Yu Jin, Alexander A. Chumanevich, Michael J. Wargovich, Mitzi Nagarkatti, Prakash S. Nagarkatti, Anthony Windust, and Lorne J. Hofseth Copyright © 2012 Deepak Poudyal et al. All rights reserved. Breast Cancer Chemoprevention: Old and New Approaches Tue, 17 Jul 2012 09:15:49 +0000 http://www.hindawi.com/journals/bmri/2012/985620/ In 1976, Sporn has defined chemoprevention as “the use of pharmacologic or natural agents that inhibit the development of invasive breast cancer either by blocking the DNA damage that initiates carcinogenesis, or by arresting or reversing the progression of premalignant cells in which such damage has already occurred.” Although the precise mechanism or mechanisms that promote a breast cancer are not completely established, the success of several recent clinical trials in preventive settings in selected high-risk populations suggests that chemoprevention is a rational and an appealing strategy. Breast cancer chemoprevention has focused heavily on endocrine intervention using selective estrogen receptor modulators (SERMs) and aromatase inhibitors (AIs). Achieving much success in this particular setting and new approaches as low-dose administration are actually under investigations in several topics. Unfortunately, these drugs are active in prevention of endocrine responsive lesions only and have no effect in reducing the risk of estrogen-negative breast cancer. Thus, recently new pathways, biomarkers, and agents likely are to be effective in this subgroup of cancers and were put under investigation. Moreover, the identification of new potential molecular targets and the development of agents aimed at these targets within cancer have already had a significant impact on advanced cancer therapy and provide a wealth of opportunities for chemoprevention. This paper will highlight current clinical research in both ER-positive and ER-negative breast cancer chemoprevention, explaining the biologic effect of the various agents on carcinogenesis and precancerous lesions, and finally presenting an excursus on the state-of-the-art about new molecular targets under investigations in breast cancer settings. Massimiliano Cazzaniga and Bernardo Bonanni Copyright © 2012 Massimiliano Cazzaniga and Bernardo Bonanni. All rights reserved. New Insights into p53 Signaling and Cancer Cell Response to DNA Damage: Implications for Cancer Therapy Sun, 15 Jul 2012 14:07:14 +0000 http://www.hindawi.com/journals/bmri/2012/170325/ Activation of the p53 signaling pathway by DNA-damaging agents was originally proposed to result either in cell cycle checkpoint activation to promote survival or in apoptotic cell death. This model provided the impetus for numerous studies focusing on the development of p53-based cancer therapies. According to recent evidence, however, most p53 wild-type human cell types respond to ionizing radiation by undergoing stress-induced premature senescence (SIPS) and not apoptosis. SIPS is a sustained growth-arrested state in which cells remain viable and secrete factors that may promote cancer growth and progression. The p21WAF1 (hereafter p21) protein has emerged as a key player in the p53 pathway. In addition to its well-studied role in cell cycle checkpoints, p21 regulates p53 and its upstream kinase (ATM), controls gene expression, suppresses apoptosis, and induces SIPS. Herein, we review these and related findings with human solid tumor-derived cell lines, report new data demonstrating dynamic behaviors of p53 and p21 in the DNA damage response, and examine the gain-of-function properties of cancer-associated p53 mutations. We point out obstacles in cancer-therapeutic strategies that are aimed at reactivating the wild-type p53 function and highlight some alternative approaches that target the apoptotic threshold in cancer cells with differing p53 status. Razmik Mirzayans, Bonnie Andrais, April Scott, and David Murray Copyright © 2012 Razmik Mirzayans et al. All rights reserved. Enhancement of Recombinant Human Endostatin on the Radiosensitivity of Human Pulmonary Adenocarcinoma A549 Cells and Its Mechanism Mon, 18 Jun 2012 13:25:15 +0000 http://www.hindawi.com/journals/bmri/2012/301931/ We observed the effects of endostar on the radiosensitivity of pulmonary adenocarcinoma A549 cells and found that endostar inhibited A549 cell growth under normoxia and hypoxia in time and dose-dependent manners; the 𝐷0 and π·π‘ž values in control and endostar groups were (1.36 and 1.30) versus (1.019 and 1.015) under normoxia and (1.693 and 1.39) versus (2.453 and 1.026) under hypoxia, respectively; SER was 1.04 under normoxia and 1.22 under hypoxia in endostar group; under normoxia, the apoptosis rates in control, radiotherapy, endostar and combination groups were 15.9Β±0.57%, 42.7Β±0.37%, 19.9Β±0.48%, and 41.5Β±0.38%, respectively, with no significant difference between combination and radiotherapy groups; there was significant difference in G2/M phase cells between combination and radiotherapy groups (𝑃=0.028); under hypoxia, the apoptosis rates in the four groups were 16.7Β±0.67%, 30.1Β±0.95%, 26.7Β±0.62%, and 36.3Β±0.71%, respectively, with significant difference between combination and radiotherapy groups; G2/M phase cells were higher in combination group than radiotherapy group (𝑃=0.000); G2/M phase cells were higher in hypoxic combination group than in normoxic combination group (𝑃=0.003). Based on these results, we conclude that under hypoxia, endostar can enhance the radiosensitivity of A549 cells through G2/M arrest. Xiao-dong Jiang, Yun Qiao, Peng Dai, Qin Chen, Jin Wu, Da-an Song, and Shi-qiu Li Copyright © 2012 Xiao-dong Jiang et al. All rights reserved. Colorectal Cancer Chemoprevention by Mesalazine and Its Derivatives Mon, 04 Jun 2012 09:55:36 +0000 http://www.hindawi.com/journals/bmri/2012/980458/ Patients with inflammatory bowel disease (IBD) face an increased lifetime risk of developing colorectal cancer (CRC). Independent factors associated with increased risk include long disease duration, extensive colonic involvement, young age at onset of IBD, severity of inflammation, primary sclerosing cholangitis, backwash ileitis, and a family history of CRC, thus emphasising the role of intestinal inflammation as an underlying mechanism. This notion is also supported by the demonstration that the use of certain drugs used to attenuate the ongoing mucosal inflammation, such as mesalazine, seems to associate with a reduced incidence of colitis-associated CRC. In the last decade, work from many laboratories has contributed to delineate the mechanisms by which mesalazine alters CRC cell behaviour. In this paper, we review the available experimental data supporting the ability of mesalazine and its derivatives to interfere with intracellular signals involved in CRC cell growth. Carmine Stolfi, Francesco Pallone, and Giovanni Monteleone Copyright © 2012 Carmine Stolfi et al. All rights reserved. Curcumin Attenuates Gastric Cancer Induced by N-Methyl-N-Nitrosourea and Saturated Sodium Chloride in Rats Tue, 29 May 2012 09:15:39 +0000 http://www.hindawi.com/journals/bmri/2012/915380/ To determine effects of curcumin on N-methyl-N-nitrosourea (MNU) and saturated sodium chloride (s-NaCl)-induced gastric cancer in rats. Male Wistar rats were divided into 5 groups: control (CO), control supplemented with 200 mg/kg curcumin (CC), MNU + s-NaCl, MNU + s-NaCl supplemented with 200 mg/kg curcumin daily for the first 3 weeks (MNU + s-NaCl + C3W), and MNU + s-NaCl supplemented with curcumin for 20 weeks (MNU + s-NaCl + C20W). To induce stomach cancer, rats except for CO and CC were orally treated with 100 mg/kg MNU on day 0 and 14, and s-NaCl twice-a-week for the first 3 weeks. The experiment was finished and rats were sacrificed at the end of 20 weeks. Cancers were found in forestomachs of all rats in MNU + s-NaCl. The expressions of phosphorylated inhibitor kappaB alpha (phospho-IκBα), 8-hydroxy-2′-deoxyguanosine (8-OHdG), and cyclin D1 significantly increased in MNU + s-NaCl compared with CO. Curcumin treatments for 3 and 20 weeks reduced the cancer incidence resulting in a decrease of phospho-IκBα expression in benign tumor-bearing rats compared with MNU + s-NaCl. Curcumin treatment for 20 weeks also decreased 8-OHdG expression in benign tumor-bearing rats compared with MNU + s-NaCl. Curcumin can attenuate cancer via a reduction of phospho-IκBα and 8-OHdG expressions, which may play a promising role in gastric carcinogenesis. Kawiya Sintara, Duangporn Thong-Ngam, Suthiluk Patumraj, and Naruemon Klaikeaw Copyright © 2012 Kawiya Sintara et al. All rights reserved. A Standardized Extract of Ginkgo biloba Neutralizes Cisplatin-Mediated Reproductive Toxicity in Rats Tue, 22 May 2012 09:30:47 +0000 http://www.hindawi.com/journals/bmri/2012/362049/ The aim of this study was to evaluate the protective effects of Ginkgo biloba (GB) against testicular damage and oxidative stress as well as caudal sperm indices in a cisplatin- (CIS-) induced rodent model. Adult male Wistar rats were given vehicle, single i.p. dose of CIS alone (10 mg/kg), GB alone (200 mg g/kg every day for five days), or single dose of CIS followed by GB (50, 100, or 200 mg/kg every day for five days). On day 6, after the first drug treatment oxidative and apoptotic testicular toxicity was evaluated. CIS-treated rats displayed decreased weights of testes and epididymis as well as caudal sperm count and motility. This reproductive toxicity was accompanied with increased germ-cell degeneration in seminiferous tubules and increased germ-cell apoptosis, increased testicular MDA levels and MPO activity, and decreased SOD and CAT activities in testes. Intensive expressions of COX-2, iNOS, and NF-κB p65 in testicular tissues were detected in CIS-treated group. Oral GB administrations at all doses to CIS-treated rats effectively alleviated all of the CIS-induced toxicity in reproductive system. The present results provide further insights into the mechanisms of protection against CIS-induced reproductive toxicity and confirm the essential antioxidant potential of a GB extract. Amr Amin, Christeena Abraham, Alaaeldin A. Hamza, Zeinab A. Abdalla, Shaikha B. Al-Shamsi, Saina S. Harethi, and Sayel Daoud Copyright © 2012 Amr Amin et al. All rights reserved. Novel Image Analysis Approach Quantifies Morphological Characteristics of 3D Breast Culture Acini with Varying Metastatic Potentials Tue, 15 May 2012 10:39:22 +0000 http://www.hindawi.com/journals/bmri/2012/102036/ Prognosis of breast cancer is primarily predicted by the histological grading of the tumor, where pathologists manually evaluate microscopic characteristics of the tissue. This labor intensive process suffers from intra- and inter-observer variations; thus, computer-aided systems that accomplish this assessment automatically are in high demand. We address this by developing an image analysis framework for the automated grading of breast cancer in in vitro three-dimensional breast epithelial acini through the characterization of acinar structure morphology. A set of statistically significant features for the characterization of acini morphology are exploited for the automated grading of six (MCF10 series) cell line cultures mimicking three grades of breast cancer along the metastatic cascade. In addition to capturing both expected and visually differentiable changes, we quantify subtle differences that pose a challenge to assess through microscopic inspection. Our method achieves 89.0% accuracy in grading the acinar structures as nonmalignant, noninvasive carcinoma, and invasive carcinoma grades. We further demonstrate that the proposed methodology can be successfully applied for the grading of in vivo tissue samples albeit with additional constraints. These results indicate that the proposed features can be used to describe the relationship between the acini morphology and cellular function along the metastatic cascade. Lindsey McKeen Polizzotti, Basak Oztan, Chris S. Bjornsson, Katherine R. Shubert, BΓΌlent Yener, and George E. Plopper Copyright Β© 2012 Lindsey McKeen Polizzotti et al. All rights reserved. Immunohistochemical Expression and Prognostic Value of CD97 and Its Ligand CD55 in Primary Gallbladder Carcinoma Tue, 03 Apr 2012 10:04:03 +0000 http://www.hindawi.com/journals/bmri/2012/587672/ Background. CD97 as a member of the EGF-TM7 family with adhesive properties plays an important role in tumor aggressiveness by binding its cellular ligand CD55, which is a complement regulatory protein expressed by cells to protect them from bystander complement attack. Previous studies have shown that CD97 and CD55 both play important roles in tumor dedifferentiation, migration, invasiveness, and metastasis. The aim of this study was to investigate CD97 and CD55 expression in primary gallbladder carcinoma (GBC) and their prognostic significance. Methods. Immunohistochemistry was used to investigate the expression of CD97 and CD55 proteins in 138 patients with GBC. Results. CD97 and CD55 were absent or only weakly expressed in the normal epithelium of the gallbladder but in 69.6% (96/138) and 65.2% (90/138) of GBC, respectively, remarkably at the invasive front of the tumors. In addition, CD97 and CD55 expressions were both significantly associated with high histologic grade (both 𝑃=0.009), advanced pathologic T stage (𝑃=0.01 and 0.009, resp.) and clinical stage (both 𝑃=0.009), and positive venous/lymphatic invasion (both 𝑃=0.009). Multivariate analyses showed that CD97 (hazard ratio, 3.236; 𝑃=0.02) and CD55 (hazard ratio, 3.209; 𝑃=0.02) expressions and clinical stage (hazard ratio, 3.918; 𝑃=0.01) were independent risk factor for overall survival. Conclusion. Our results provide convincing evidence for the first time that the expressions of CD97 and CD55 are both upregulated in human GBC. The expression levels of CD97 and CD55 in GBC were associated with the severity of the tumor. Furthermore, CD97 and CD55 expressions were independent poor prognostic factors for overall survival in patients with GBC. Jinsheng Wu, Liu Lei, Shaochuang Wang, Dianhua Gu, and Jianhuai Zhang Copyright © 2012 Jinsheng Wu et al. All rights reserved. Dendritic Cells The Tumor Microenvironment and the Challenges for an Effective Antitumor Vaccination Thu, 15 Mar 2012 11:46:53 +0000 http://www.hindawi.com/journals/bmri/2012/425476/ Many clinical trials have been carried out or are in progress to assess the therapeutic potential of dendritic-cell- (DC-) based vaccines on cancer patients, and recently the first DC-based vaccine for human cancer was approved by the FDA. Herewith, we describe the general characteristics of DCs and different strategies to generate effective antitumor DC vaccines. In recent years, the relevance of the tumor microenvironment in the progression of cancer has been highlighted. It has been shown that the tumor microenvironment is capable of inactivating various components of the immune system responsible for tumor clearance. In particular, the effect of the tumor microenvironment on antigen-presenting cells, such as DCs, does not only render these immune cells unable to induce specific immune responses, but also turns them into promoters of tumor growth. We also describe strategies likely to increase the efficacy of DC vaccines by reprogramming the immunosuppressive nature of the tumor microenvironment. Fabian Benencia, Leslee Sprague, John McGinty, Michelle Pate, and Maria Muccioli Copyright © 2012 Fabian Benencia et al. All rights reserved. Dickkopf-1 Expression Is a Novel Prognostic Marker for Gastric Cancer Sun, 04 Mar 2012 14:04:25 +0000 http://www.hindawi.com/journals/bmri/2012/804592/ Aim. To investigate the involvement of Dickkopf-1 expression in gastric cancer. Methods. Dickkopf-1 mRNA and protein expression were determined by real-time quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) and immunohistochemistry in specimens of primary cancer and their adjacent noncancerous tissues in gastric cancer patients. Results. Dickkopf-1 mRNA and protein expression levels were both significantly upregulated in gastric cancer lesions compared with adjacent noncancerous tissues. Its positive expression was correlated with depth of invasion, vessel invasion, lymph node and distant metastasis, and TNM stage of tumors. Additionally, in stages I, II, and III gastric cancers, the 5- year survival rate of patients with a high expression of Dickkopf-1 was significantly lower than that in patients with low expression. In stage IV, Dickkopf-1 expression did not correlate with the 5-year survival rate. Further multivariate analysis suggested that the up-regulation of Dickkopf-1 was an independent prognostic indicator for gastric cancer. Conclusion. A subset of cases with gastric cancer revealed the up-regulation of Dickkopf-1, which was associated with a progressive pathological feature and an aggressive clinical course. Therefore, Dickkopf-1 expression may be predictor for poor prognosis in patients with gastric cancer. This is the first report describing the involvement of Dickkopf-1 in gastric cancer. Chengcheng Gao, Rui Xie, Chengcheng Ren, and Xiaozhong Yang Copyright © 2012 Chengcheng Gao et al. All rights reserved. CD24 Expression as a Marker for Predicting Clinical Outcome in Human Gliomas Tue, 28 Feb 2012 12:13:35 +0000 http://www.hindawi.com/journals/bmri/2012/517172/ CD24 is overexpressed in glioma cells in vitro and in vivo. However, the correlation of its expression with clinicopathological parameters of gliomas and its prognostic significance in this tumor remain largely unknown. To address this problem, 151 glioma specimens and 10 nonneoplastic brain tissues were collected. Quantitative real-time PCR, immunochemistry assay, and Western blot analysis were carried out to investigate the expression of CD24. As per the results, CD24 was overexpressed in gliomas. Its expression levels in glioma tissues with higher grade (𝑃<0.001) and lower KPS (𝑃<0.001) were significantly higher than those with lower grade and higher KPS, respectively. Cox multifactor analysis showed that CD24 (𝑃=0.02) was an independent prognosis factor for human glioma. Our data provides convincing evidence for the first time that the overexpression of CD24 at gene and protein levels is correlated with advanced clinicopathological parameters and poor prognosis in patients with glioma. Jianping Deng, Guodong Gao, Liang Wang, Tao Wang, Jia Yu, and Zhenwei Zhao Copyright © 2012 Jianping Deng et al. All rights reserved. Quantitative Proteomic Study of Human Lung Squamous Carcinoma and Normal Bronchial Epithelial Acquired by Laser Capture Microdissection Tue, 28 Feb 2012 12:04:48 +0000 http://www.hindawi.com/journals/bmri/2012/510418/ Objective. To investigate the differential protein profile of human lung squamous carcinoma (HLSC) and normal bronchial epithelium (NBE) and provide preliminary results for further study to explore the carcinogenic mechanism of HLSC. Methods. Laser capture microdissection (LCM) was used to purify the target cells from 10 pairs of HLSC tissues and their matched NHBE, respectively. A stable-isotope labeled strategy using iTRAQ, followed by 2D-LC/Q-STAR mass spectrometry, was performed to separate and identify the differential expression proteins. Results. A total of 96 differential expression proteins in the LCM-purified HLSC and NBE were identified. Compared with NBE, 49 proteins were upregulated and 47 proteins were downregulated in HLSC. Furthermore, the expression levels of the differential proteins including HSPB1, CKB, SCCA1, S100A8, as well as S100A9 were confirmed by western blot and tissue microarray and were consistent with the results of quantitative proteomics. Conclusion. The different expression proteins in HLSC will provide scientific foundation for further study to explore the carcinogenic mechanism of HLSC. Xu Yan, Cao Lan-Qin, Jin Long-Yu, Chen Zhu-Chu, Zeng Gu-Qing, Tang Can-E, Li Guo-Qing, Duan Chao-Jun, Peng Fang, Xiao Zhi-Qiang, and Li Cui Copyright Β© 2012 Xu Yan et al. All rights reserved. Targeted Therapies Development in the Treatment of Advanced Nonsmall Cell Lung Cancer Sun, 18 Dec 2011 11:15:27 +0000 http://www.hindawi.com/journals/bmri/2011/415641/ Cesare Gridelli and Enriqueta Felip Copyright © 2011 Cesare Gridelli and Enriqueta Felip. All rights reserved. Gene Expression Analysis of In Vitro Cocultures to Study Interactions between Breast Epithelium and Stroma Tue, 13 Dec 2011 12:59:50 +0000 http://www.hindawi.com/journals/bmri/2011/520987/ The interactions between breast epithelium and stroma are fundamental to normal tissue homeostasis and for tumor initiation and progression. Gene expression studies of in vitro coculture models demonstrate that in vitro models have relevance for tumor progression in vivo. For example, stromal gene expression has been shown to vary in association with tumor subtype in vivo, and analogous in vitro cocultures recapitulate subtype-specific biological interactions. Cocultures can be used to study cancer cell interactions with specific stromal components (e.g., immune cells, fibroblasts, endothelium) and different representative cell lines (e.g., cancer-associated versus normal-associated fibroblasts versus established, immortalized fibroblasts) can help elucidate the role of stromal variation in tumor phenotypes. Gene expression data can also be combined with cell-based assays to identify cellular phenotypes associated with gene expression changes. Coculture systems are manipulable systems that can yield important insights about cell-cell interactions and the cellular phenotypes that occur as tumor and stroma co-evolve. Patricia Casbas-Hernandez, Jodie M. Fleming, and Melissa A. Troester Copyright Β© 2011 Patricia Casbas-Hernandez et al. All rights reserved. Safety and Clinical Usage of Newcastle Disease Virus in Cancer Therapy Wed, 26 Oct 2011 18:49:34 +0000 http://www.hindawi.com/journals/bmri/2011/718710/ Newcastle disease virus (NDV) is an avian virus that causes deadly infection to over 250 species of birds, including domestic and wild-type, thus resulting in substantial losses to the poultry industry worldwide. Many reports have demonstrated the oncolytic effect of NDV towards human tumor cells. The interesting aspect of NDV is its ability to selectively replicate in cancer cells. Some of the studies have undergone human clinical trials, and favorable results were obtained. Therefore, NDV strains can be the potential therapeutic agent in cancer therapy. However, investigation on the therapeutic perspectives of NDV, especially human immunological effects, is still ongoing. This paper provides an overview of the current studies on the cytotoxic and anticancer effect of NDV via direct oncolysis effects or immune stimulation. Safety of NDV strains applied for cancer immunotherapy is also discussed in this paper. Han Yuen Lam, Swee Keong Yeap, Mehdi Rasoli, Abdul Rahman Omar, Khatijah Yusoff, Abd Aziz Suraini, and Noorjahan Banu Alitheen Copyright © 2011 Han Yuen Lam et al. All rights reserved. Novel Stromal Biomarkers in Human Breast Cancer Tissues Provide Evidence for the More Malignant Phenotype of Estrogen Receptor-Negative Tumors Mon, 03 Oct 2011 08:58:40 +0000 http://www.hindawi.com/journals/bmri/2011/723650/ Research efforts were focused on genetic alterations in epithelial cancer cells. Epithelial-stromal interactions play a crucial role in cancer initiation, progression, invasion, angiogenesis, and metastasis; however, the active role of stroma in human breast tumorigenesis in relation to estrogen receptor (ER) status of epithelial cells has not been explored. Using proteomics and biochemical approaches, we identified two stromal proteins in ER-positive and ER-negative human breast cancer tissues that may affect malignant transformation in breast cancer. Two putative biomarkers, T-cell receptor alpha (TCR-Ξ±) and zinc finger and BRCA1-interacting protein with a KRAB domain (ZBRK1), were detected in leukocytes of ER-positive and endothelial cells of ER-negative tissues, respectively. Our data suggest an immunosuppressive role of leukocytes in invasive breast tumors, propose a multifunctional nature of ZBRK1 in estrogen receptor regulation and angiogenesis, and demonstrate the aggressiveness of ER-negative human breast carcinomas. This research project may identify new stromal drug targets for the treatment of breast cancer patients. Zahraa I. Khamis, Ziad J. Sahab, Stephen W. Byers, and Qing-Xiang Amy Sang Copyright Β© 2011 Zahraa I. Khamis et al. All rights reserved. Emerging Role for Epithelial Polarity Proteins of the Crumbs Family as Potential Tumor Suppressors Tue, 06 Sep 2011 15:50:23 +0000 http://www.hindawi.com/journals/bmri/2011/868217/ Defects in apical-basal polarity regulation are associated with tissue overgrowth and tumorogenesis, yet the molecular mechanisms linking epithelial polarity regulators to hyperplasia or neoplasia remain elusive. In addition, exploration of the expression and function of the full complement of proteins required for the polarized architecture of epithelial cells in the context of cancer is awaited. This paper provides an overview of recent studies performed on Drosophila and vertebrates showing that apical polarity proteins of the Crumbs family act to repress tissue growth and epithelial to mesenchymal transition. Thus, these proteins emerge as potential tumor suppressors. Interestingly, analysis of the molecular function of Crumbs proteins reveals a function for these polarity regulators in junctional complexes stability and control of signaling pathways regulating proliferation and apoptosis. Thereby, these studies provide a molecular basis explaining how regulation of epithelial polarity is coupled to tumorogenesis. Patrick Laprise Copyright Β© 2011 Patrick Laprise. All rights reserved. Early Detection of Tumor Response by FLT/MicroPET Imaging in a C26 Murine Colon Carcinoma Solid Tumor Animal Model Tue, 16 Aug 2011 11:38:26 +0000 http://www.hindawi.com/journals/bmri/2011/535902/ Fluorine-18 fluorodeoxyglucose (18F-FDG) positron emission tomography (PET) imaging demonstrated the change of glucose consumption of tumor cells, but problems with specificity and difficulties in early detection of tumor response to chemotherapy have led to the development of new PET tracers. Fluorine-18-fluorothymidine (18F-FLT) images cellular proliferation by entering the salvage pathway of DNA synthesis. In this study, we evaluate the early response of colon carcinoma to the chemotherapeutic drug, lipo-Dox, in C26 murine colorectal carcinoma-bearing mice by 18F-FDG and 18F-FLT. The male BALB/c mice were bilaterally inoculated with 1Γ—105 and 1Γ—106 C26 tumor cells per flank. Mice were intravenously treated with 10 mg/kg lipo-Dox at day 8 after 18F-FDG and 18F-FLT imaging. The biodistribution of 18F-FDG and 18F-FLT were followed by the microPET imaging at day 9. For the quantitative measurement of microPET imaging at day 9, 18F-FLT was superior to 18F-FDG for early detection of tumor response to Lipo-DOX at various tumor sizes (𝑃<0.05). The data of biodistribution showed similar results with those from the quantification of SUV (standard uptake value) by microPET imaging. The study indicates that 18F-FLT/microPET is a useful imaging modality for early detection of chemotherapy in the colorectal mouse model. Wan-Chi Lee, Chih-Hsien Chang, Chung-Li Ho, Liang-Cheng Chen, Yu-Hsien Wu, Jenn-Tzong Chen, Ying-Ling Wang, and Te-Wei Lee Copyright © 2011 Wan-Chi Lee et al. All rights reserved. Recent Advances in p53 Research and Cancer Treatment Thu, 16 Jun 2011 10:48:41 +0000 http://www.hindawi.com/journals/bmri/2011/978312/ TP53, encoding p53, is one of the most famous tumor suppressor genes. The majority of human cancers demonstrate the inactivation of the p53 pathway. Mutant p53 not only, no longer, functions as a tumor suppressor but can also exert tumor-promoting effects. The basic function of p53 is to respond to cellular stress. We herein review the recent advances in p53 research and focus on apoptosis, cell cycle arrest, and senescence in response to stress. We also review the clinical applications of p53-based therapy for human cancer. Kazufumi Suzuki and Hisahiro Matsubara Copyright © 2011 Kazufumi Suzuki and Hisahiro Matsubara. All rights reserved. TP53 Status and Response to Treatment in Breast Cancers Thu, 02 Jun 2011 08:35:07 +0000 http://www.hindawi.com/journals/bmri/2011/284584/ The p53 wild-type protein plays an important role in cells as is shown by its fine regulation at different levels. Since its discovery, numerous mutations have been described. In breast cancers, p53 is mutated in almost 30% of cases, with a higher frequency in some tumor subtypes. TP53 mutation is reported to be a factor for good prognosis in some studies, while in others it is a factor for poor prognosis. The explanation for these different results could be linked to the fact that the studies were performed on different tumor types and with different therapy regimens. Mariana Varna, Guilhem Bousquet, Louis-François Plassa, Philippe Bertheau, and Anne Janin Copyright © 2011 Mariana Varna et al. All rights reserved. Next-Generation Sequencing of MicroRNAs for Breast Cancer Detection Thu, 26 May 2011 15:09:56 +0000 http://www.hindawi.com/journals/bmri/2011/597145/ It is reported that different microRNA (miRNA) profiles can be detected in the blood of cancer patients. We investigated that whether the key serum miRNAs could discriminate patients with and without breast cancer. This study was divided into three parts: (1) miRNA marker discovery using SOLiD sequencing-based miRNA profiling on cancerous and adjacent noncancerous breast tissue of one breast cancer patient; (2) marker selection and validation by real-time PCR on a small set of serum; (3) gene ontology analysis of the key miRNA target genes. Of genome-wide tissue miRNA expression analysis, five miRNAs were found to be altered more than fivefold by SOLiD sequencing (i.e., miR-29a, miR-23a, miR-23b, miR-192, and miR-21). All the five miRNAs were validated on the 20 breast cancer patients and 20 controls. miR-29a and miR-21 were significantly increased in the serum of breast cancer patients (𝑃<.05). Gene ontology analysis of the target genes revealed enrichment for special biological process categories, that is, signal transduction, development, apoptosis, cell proliferation, and cell adhesion. SOLiD sequencing provides a promising method for cancer-related miRNA profiling. Serum miRNAs may be useful biomarkers for breast cancer detection. Qian Wu, Zuhong Lu, Hailing Li, Jiafeng Lu, Li Guo, and Qinyu Ge Copyright Β© 2011 Qian Wu et al. All rights reserved. Gefitinib in Non Small Cell Lung Cancer Mon, 23 May 2011 12:39:49 +0000 http://www.hindawi.com/journals/bmri/2011/815269/ Gefitinib is an oral, reversible, tyrosine kinase inhibitor of epidermal growth factor receptor (EGFR) that plays a key role in the biology of non small cell lung cancer (NSCLC). Phase I studies indicated that the recommended dose of gefitinib was 250 mg/day. Rash, diarrhea, and nausea were the most common adverse events. The positive results obtained in early phase 2 clinical trials with gefitinib were not confirmed in large phase 3 trials in unselected patients with advanced NSCLC. The subsequent discovery that the presence of somatic mutations in the kinase domain of EGFR strongly correlates with increased responsiveness to EGFR tyrosine kinase inhibitors prompted phase 2 and 3 trials with gefitinib in the first line-treatment of EGFR-mutated NSCLC. The results of these trials have demonstrated the efficacy of gefitinib that can be now considered as the standard first-line treatment of patients with advanced NSCLC harbouring activating EGFR mutations. Raffaele Costanzo, Maria Carmela Piccirillo, Claudia Sandomenico, Guido Carillio, Agnese Montanino, Gennaro Daniele, Pasqualina Giordano, Jane Bryce, Gianfranco De Feo, Massimo Di Maio, Gaetano Rocco, Nicola Normanno, Francesco Perrone, and Alessandro Morabito Copyright © 2011 Raffaele Costanzo et al. All rights reserved. The Application of SELDI-TOF-MS in Clinical Diagnosis of Cancers Mon, 23 May 2011 10:30:42 +0000 http://www.hindawi.com/journals/bmri/2011/245821/ Cancer diagnosis is important, and the early diagnosis of cancers could predict a more successful treatment. The proteomic studies emerged to be useful in combined analyses of samples from patients and provide more accurate diagnosis when compared to the single-factor-based diagnosis. In recent years, cancer detection with surface-enhanced laser desorption/ionization time of flight mass spectrometry (SELDI-TOF MS) is flourishing and brought significant progress in this area. This paper summarizes some recent results with this technique for cancer diagnosis. Chibo Liu Copyright © 2011 Chibo Liu. All rights reserved. The Role of Proteasome Inhibition in Nonsmall Cell Lung Cancer Wed, 04 May 2011 11:44:44 +0000 http://www.hindawi.com/journals/bmri/2011/806506/ Lung cancer therapy with current available chemotherapeutic agents is mainly palliative. For these and other reasons there is now a great interest to find targeted therapies that can be effective not only palliating lung cancer or decreasing treatment-related toxicity, but also giving hope to cure these patients. It is already well known that the ubiquitin-proteasome system like other cellular pathways is critical for the proliferation and survival of cancer cells; thus, proteosome inhibition has become a very attractive anticancer therapy. There are several phase I and phase II clinical trials now in non-small cell lung cancer and small cell lung cancer using this potential target. Most of the trials use bortezomib in combination with chemotherapeutic agents. This paper tends to make a state-of-the-art review based on the available literature regarding the use of bortezomib as a single agent or in combination with chemotherapy in patients with lung cancer. Mauricio Escobar, Michel Velez, Astrid Belalcazar, Edgardo S. Santos, and Luis E. Raez Copyright © 2011 Mauricio Escobar et al. All rights reserved. Acute Myeloid Leukemia with the t(8;21) Translocation: Clinical Consequences and Biological Implications Tue, 03 May 2011 11:03:00 +0000 http://www.hindawi.com/journals/bmri/2011/104631/ The t(8;21) abnormality occurs in a minority of acute myeloid leukemia (AML) patients. The translocation results in an in-frame fusion of two genes, resulting in a fusion protein of one N-terminal domain from the AML1 gene and four C-terminal domains from the ETO gene. This protein has multiple effects on the regulation of the proliferation, the differentiation, and the viability of leukemic cells. The translocation can be detected as the only genetic abnormality or as part of more complex abnormalities. If t(8;21) is detected in a patient with bone marrow pathology, the diagnosis AML can be made based on this abnormality alone. t(8;21) is usually associated with a good prognosis. Whether the detection of the fusion gene can be used for evaluation of minimal residual disease and risk of leukemia relapse remains to be clarified. To conclude, detection of t(8;21) is essential for optimal handling of these patients as it has both diagnostic, prognostic, and therapeutic implications. Håkon Reikvam, Kimberley Joanne Hatfield, Astrid Olsnes Kittang, Randi Hovland, and Øystein Bruserud Copyright © 2011 Håkon Reikvam et al. All rights reserved. Intermittent Chemotherapy and Erlotinib for Nonsmokers or Light Smokers with Advanced Adenocarcinoma of the Lung: A Phase II Clinical Trial Tue, 12 Apr 2011 15:52:44 +0000 http://www.hindawi.com/journals/bmri/2011/185646/ Background. Intermittent application of chemotherapy and tyrosine kinase inhibitors may avoid antagonism between the two classes of drugs. This hypothesis was tested in a Phase II clinical trial. Patients and Methods. Eligible patients were nonsmokers or light smokers, chemo-naïve, with metastatic adenocarcinoma of the lung. Treatment: 4 to 6 cycles of gemcitabine 1250 mg/m2 on days 1 and 4, cisplatin 75 mg/m2 on day 2, and erlotnib 150 mg daily on days 5–15, followed by erlotinib as maintenance. Results. 24 patients entered the trial. Four pts had grade 3 toxicity. Complete remission (CR) and partial remission (PR) were seen in 5 pts and 9 pts, respectively (response rate 58%). Median time to progression (TTP) was 13.4 months and median overall survival (OS) was 23 months. When compared to patients with negative or unknown status of EGFR mutations, 8 patients with EGFR gene activating mutations had significantly superior experience: 4 CR and 4 PR, with median TTP 21.5 months and OS 24.2 months (𝑃<.05). Conclusions. Intermittent schedule with gemcitabine, cisplatin and erlotinib has mild toxicity. For patients who are positive for EGFR gene activating mutations, this treatment offers excellent response rate, time to progression and survival. Matjaz Zwitter, Mirjana Rajer, Viljem Kovac, Izidor Kern, Martina Vrankar, and Uros Smrdel Copyright © 2011 Matjaz Zwitter et al. All rights reserved. MicroRNA Gene Dosage Alterations and Drug Response in Lung Cancer Thu, 31 Mar 2011 09:01:36 +0000 http://www.hindawi.com/journals/bmri/2011/474632/ Chemotherapy resistance is a key contributor to the dismal prognoses for lung cancer patients. While the majority of studies have focused on sequence mutations and expression changes in protein-coding genes, recent reports have suggested that microRNA (miRNA) expression changes also play an influential role in chemotherapy response. However, the role of genetic alterations at miRNA loci in the context of chemotherapy response has yet to be investigated. In this study, we demonstrate the application of an integrative, multidimensional approach in order to identify miRNAs that are associated with chemotherapeutic resistance and sensitivity utilizing publicly available drug response, miRNA loci copy number, miRNA expression, and mRNA expression data from independent resources. By instigating a logical stepwise strategy, we have identified specific miRNAs that are associated with resistance to several chemotherapeutic agents and provide a proof of principle demonstration of how these various databases may be exploited to derive relevant pharmacogenomic results. Katey S. S. Enfield, Greg L. Stewart, Larissa A. Pikor, Carlos E. Alvarez, Stephen Lam, Wan L. Lam, and Raj Chari Copyright Β© 2011 Katey S. S. Enfield et al. All rights reserved. Target Therapies in Lung Cancer Wed, 30 Mar 2011 09:43:17 +0000 http://www.hindawi.com/journals/bmri/2011/921231/ Targeting intracellular signaling molecules is an attractive approach for treatment of malignancies. In particular lung cancer has reached a plateau regarding overall survival, and target therapies could offer the possibility to improve patients' outcome beyond cytotoxic activity. The goal for target therapies is to identify agents that target tumor-specific molecules, thus sparing normal tissues; those molecules are called biomarkers, and their identification is recommended because it has a predictive value, for example, provides information on outcome with regard to a specific treatment. The increased specificity should lead to decreased toxicity and better activity. Herein we provide an update of the main target therapies in development or already available for the treatment of nonsmall cell lung cancer. A. Bearz, M. Berretta, A. Lleshi, and U. Tirelli Copyright © 2011 A. Bearz et al. All rights reserved. Chromosomal Rearrangements in Post-Chernobyl Papillary Thyroid Carcinomas: Evaluation by Spectral Karyotyping and Automated Interphase FISH Sun, 13 Mar 2011 14:34:15 +0000 http://www.hindawi.com/journals/bmri/2011/693691/ Structural genomic rearrangements are frequent findings in human cancers. Therefore, papillary thyroid carcinomas (PTCs) were investigated for chromosomal aberrations and rearrangements of the RET proto-oncogene. For this purpose, primary cultures from 23 PTC have been established and metaphase preparations were analysed by spectral karyotyping (SKY). In addition, interphase cell preparations of the same cases were investigated by fluorescence in situ hybridisation (FISH) for the presence of RET/PTC rearrangements using RET-specific DNA probes. SKY analysis of PTC revealed structural aberrations of chromosome 11 and several numerical aberrations with frequent loss of chromosomes 20, 21, and 22. FISH analysis for RET/PTC rearrangements showed prevalence of this rearrangement in 72% (16 out of 22) of cases. However, only subpopulations of tumour cells exhibited this rearrangement indicating genetic heterogeneity. The comparison of visual and automated scoring of FISH signals revealed concordant results in 19 out of 22 cases (87%) indicating reliable scoring results using the optimised scoring parameter for RET/PTC with the automated Metafer4 system. It can be concluded from this study that genomic rearrangements are frequent in PTC and therefore important events in thyroid carcinogenesis. Ludwig Hieber, Reinhard Huber, Verena Bauer, Quirin Schäffner, Herbert Braselmann, Geraldine Thomas, Tatjana Bogdanova, and Horst Zitzelsberger Copyright © 2011 Ludwig Hieber et al. All rights reserved. MYC, TP53, and Chromosome 17 Copy-Number Alterations in Multiple Gastric Cancer Cell Lines and in Their Parental Primary Tumors Wed, 23 Feb 2011 16:08:22 +0000 http://www.hindawi.com/journals/bmri/2011/631268/ We evaluated whether MYC, TP53, and chromosome 17 copy-number alterations occur in ACP02, ACP03, and AGP01 gastric cancer cell lines and in their tumor counterpart. Fluorescence in situ hybridization for MYC and TP53 genes and for chromosome 17 was applied in the 6th, 12th, 60th, and 85th passages of the cell lines and in their parental primary tumors. We observed that three and four MYC signals were the most common alterations in gastric cell lines and tumors. ACP02 presented cells with two copies of chr17 and loss of one copy of TP53 more frequently than ACP03 and AGP01. Only ACP03 and AGP01 presented clonal chr17 trisomy with three or two TP53 copies. The frequency of MYC gain, TP53 loss, and chromosome 17 trisomy seems to increase in gastric cell lines compared to their parental tumors. Our findings reveal that these cell lines retain, in vitro, the genetic alterations presented in their parental primary tumors. Mariana Ferreira Leal, Danielle Queiroz Calcagno, Joana de Fátima Ferreira Borges da Costa, Tanielly Cristina Raiol Silva, André Salim Khayat, Elizabeth Suchi Chen, Paulo Pimentel Assumpção, Marília de Arruda Cardoso Smith, and Rommel Rodríguez Burbano Copyright © 2011 Mariana Ferreira Leal et al. All rights reserved. Green Tea Epigallocatechin Gallate Exhibits Anticancer Effect in Human Pancreatic Carcinoma Cells via the Inhibition of Both Focal Adhesion Kinase and Insulin-Like Growth Factor-I Receptor Wed, 26 Jan 2011 13:38:05 +0000 http://www.hindawi.com/journals/bmri/2010/290516/ The exact molecular mechanism by which epigallocatechin gallate (EGCG) suppresses human pancreatic cancer cell proliferation is unclear. We show here that EGCG-treated pancreatic cancer cells AsPC-1 and BxPC-3 decrease cell adhesion ability on micro-pattern dots, accompanied by dephosphorylations of both focal adhesion kinase (FAK) and insulin-like growth factor-1 receptor (IGF-1R) whereas retained the activations of mitogen-activated protein kinase and mammalian target of rapamycin. The growth of AsPC-1 and BxPC-3 cells can be significantly suppressed by EGCG treatment alone in a dose-dependent manner. At a dose of 100 μM which completely abolishes activations of FAK and IGF-1R, EGCG suppresses more than 50% of cell proliferation without evidence of apoptosis analyzed by PARP cleavage. Finally, the MEK1/2 inhibitor U0126 enhances growth-suppressive effect of EGCG. Our data suggests that blocking FAK and IGF-1R by EGCG could prove valuable for targeted therapy, which can be used in combination with other therapies, for pancreatic cancer. Hoang Anh Vu, Yuuichi Beppu, Hoang Thanh Chi, Kousuke Sasaki, Hideaki Yamamoto, Phan Thi Xinh, Takashi Tanii, Yukihiko Hara, Toshiki Watanabe, Yuko Sato, and Iwao Ohdomari Copyright © 2010 Hoang Anh Vu et al. All rights reserved. p53: The Attractive Tumor Suppressor in the Cancer Research Field Mon, 06 Dec 2010 12:21:49 +0000 http://www.hindawi.com/journals/bmri/2011/603925/ p53 is one of the most studied tumor suppressors in the cancer research field. Of note, over 50% of human tumors carry loss of function mutations, and thus p53 has been considered to be a classical Knudson-type tumor suppressor. From the functional point of view, p53 is a nuclear transcription factor to transactivate a variety of its target genes implicated in the induction of cell cycle arrest, DNA repair, and apoptotic cell death. In response to cellular stresses such as DNA damage, p53 is activated and promotes cell cycle arrest followed by the replacement of DNA lesions and/or apoptotic cell death. Therefore, p53 is able to maintain the genomic integrity to prevent the accumulation of genetic alterations, and thus stands at a crossroad between cell survival and cell death. In this paper, we describe a variety of molecular mechanisms behind the regulation of p53. Toshinori Ozaki and Akira Nakagawara Copyright © 2011 Toshinori Ozaki and Akira Nakagawara. All rights reserved. Identification of a New Peptide for Fibrosarcoma Tumor Targeting and Imaging In Vivo Sun, 05 Dec 2010 18:50:25 +0000 http://www.hindawi.com/journals/bmri/2010/167045/ A 12-mer amino acid peptide SATTHYRLQAAN, denominated TK4, was isolated from a phage-display library with fibrosarcoma tumor-binding activity. In vivo biodistribution analysis of TK4-displaying phage showed a significant increased phage titer in implanted tumor up to 10-fold in comparison with normal tissues after systemic administration in mouse. Competition assay confirmed that the binding of TK4-phage to tumor cells depends on the TK4 peptide. Intravenous injection of 131I-labeled synthetic TK4 peptide in mice showed a tumor retention of 3.3% and 2.7% ID/g at 1- and 4-hour postinjection, respectively. Tumor-to-muscle ratio was 1.1, 5.7, and 3.2 at 1-, 4-, and 24-hour, respectively, and tumors were imaged on a digital Ξ³-camera at 4-hour postinjection. The present data suggest that TK4 holds promise as a lead structure for tumor targeting, and it could be further applied in the development of diagnostic or therapeutic agent. Chia-Che Wu, Erh-Hsuan Lin, Yu-Ching Lee, Cheng-Jeng Tai, Tsu-Hsiang Kuo, Hsin-Ell Wang, Tsai-Yueh Luo, Ying-Kai Fu, Haw-Jan Chen, Ming-Ding Sun, Chih-Hsiung Wu, Cheng-Wen WU, Sy-Jye Leu, and Win-Ping Deng Copyright Β© 2010 Chia-Che Wu et al. All rights reserved. Hydrogen Peroxide Toxicity Induces Ras Signaling in Human Neuroblastoma SH-SY5Y Cultured Cells Sun, 05 Sep 2010 14:14:16 +0000 http://www.hindawi.com/journals/bmri/2010/803815/ It has been reported that overproduction of reactive oxygen species occurs after brain injury and mediates neuronal cells degeneration. In the present study, we examined the role of Ras signaling on hydrogen peroxide-induced neuronal cells degeneration in dopaminergic neuroblastoma SH-SY5Y cells. Hydrogen peroxide significantly reduced cell viability in SH-SY5Y cultured cells. An inhibitor of the enzyme that catalyzes the farnesylation of Ras proteins, FTI-277, and a competitive inhibitor of GTP-binding proteins, GDP-beta-S significantly decreased hydrogen peroxide-induced reduction in cell viability in SH-SY5Y cultured cells. The results of this study might indicate that a Ras-dependent signaling pathway plays a role in hydrogen peroxide-induced toxicity in neuronal cells. Jirapa Chetsawang, Piyarat Govitrapong, and Banthit Chetsawang Copyright © 2010 Jirapa Chetsawang et al. All rights reserved.