International Journal of Nephrology http://www.hindawi.com The latest articles from Hindawi Publishing Corporation © 2014 , Hindawi Publishing Corporation . All rights reserved. Primary Nephrotic Syndrome in Adults as a Risk Factor for Pulmonary Embolism: An Up-to-Date Review of the Literature Wed, 16 Apr 2014 16:23:11 +0000 http://www.hindawi.com/journals/ijn/2014/916760/ Patients with nephrotic syndrome are at an increased risk for thrombotic events; deep venous thrombosis, renal vein thrombosis, and pulmonary embolism are quite common in patients with nephrotic syndrome. It is important to note that nephrotic syndrome secondary to membranous nephropathy may impose a greater thrombotic risk for unclear reasons. Increased platelet activation, enhanced red blood cell aggregation, and an imbalance between procoagulant and anticoagulant factors are thought to underlie the excessive thrombotic risk in patients with nephrotic syndrome. The current scientific literature suggests that patients with low serum albumin levels and membranous nephropathy may benefit from primary prophylactic anticoagulation. A thorough approach which includes accounting for all additional thrombotic risk factors is, therefore, essential. Patient counseling regarding the pros and cons of anticoagulation is of paramount importance. Future prospective randomized studies should address the question regarding the utility of primary thromboprophylaxis in patients with nephrotic syndrome. Aibek E. Mirrakhimov, Alaa M. Ali, Aram Barbaryan, Suartcha Prueksaritanond, and Nasir Hussain Copyright © 2014 Aibek E. Mirrakhimov et al. All rights reserved. Effect of AST-120 on Endothelial Dysfunction in Adenine-Induced Uremic Rats Mon, 14 Apr 2014 09:15:20 +0000 http://www.hindawi.com/journals/ijn/2014/164125/ Aim. Chronic kidney disease (CKD) represents endothelial dysfunction. Monocyte adhesion is recognized as the initial step of arteriosclerosis. Indoxyl sulfate (IS) is considered to be a risk factor for arteriosclerosis in CKD. Oral adsorbent AST-120 retards deterioration of renal function, reducing accumulation of IS. In the present study, we determined the monocyte adhesion in the adenine-induced uremic rats in vivo and effects of AST-120 on the adhesion molecules. Methods. Twenty-four rats were divided into control, control+AST-120, adenine, and adenine+AST-120 groups. The number of monocytes adherent to the endothelium of thoracic aorta by imaging the entire endothelial surface and the mRNA expressions of adhesion and atherosclerosis-related molecules were examined on day 49. The mRNA expressions of ICAM-1 and VCAM-1 in human umbilical vein endothelial cells were also examined. Results. Adenine increased the number of adherent monocytes, and AST-120 suppressed the increase. The monocyte adhesion was related to serum creatinine and IS in sera. Overexpression of VCAM-1 and TGF-β1 mRNA in the arterial walls was observed in uremic rats. IS induced increase of the ICAM-1 and VCAM-1 mRNA expressions in vitro. Conclusion. It appears that uremic condition introduces the monocyte adhesion to arterial wall and AST-120 might inhibit increasing of the monocyte adherence with CKD progression. Yuko Inami, Chieko Hamada, Takuya Seto, Yoko Hotta, Seiki Aruga, Jiro Inuma, Kosuke Azuma, Hiroaki Io, Kayo Kaneko, Hirotaka Watada, and Yasuhiko Tomino Copyright © 2014 Yuko Inami et al. All rights reserved. Thyroid Disorders and Chronic Kidney Disease Sun, 13 Apr 2014 11:20:06 +0000 http://www.hindawi.com/journals/ijn/2014/520281/ Thyroid hormones play a very important role regulating metabolism, development, protein synthesis, and influencing other hormone functions. The two main hormones produced by the thyroid are triiodothyronine (T3) and thyroxine (T4). These hormones can also have significant impact on kidney disease so it is important to consider the physiological association of thyroid dysfunction in relation to chronic kidney disease (CKD). CKD has been known to affect the pituitary-thyroid axis and the peripheral metabolism of thyroid hormones. Low T3 levels are the most common laboratory finding followed by subclinical hypothyroidism in CKD patients. Hyperthyroidism is usually not associated with CKD but has been known to accelerate it. One of the most important links between thyroid disorders and CKD is uremia. Patients who are appropriately treated for thyroid disease have a less chance of developing renal dysfunction. Clinicians need to be very careful in treating patients with low T3 levels who also have an elevation in TSH, as this can lead to a negative nitrogen balance. Thus, clinicians should be well educated on the role of thyroid hormones in relation to CKD so that proper treatment can be delivered to the patient. Mohamed Mohamedali, Srikanth Reddy Maddika, Anix Vyas, Viswanathan Iyer, and Pramil Cheriyath Copyright © 2014 Mohamed Mohamedali et al. All rights reserved. Salivary Creatinine Estimation as an Alternative to Serum Creatinine in Chronic Kidney Disease Patients Thu, 10 Apr 2014 14:19:31 +0000 http://www.hindawi.com/journals/ijn/2014/742724/ Context. Sampling blood for serum analysis is an invasive procedure. A noninvasive alternative would be beneficial to patients and health care professionals. Aim. To correlate serum and salivary creatinine levels and evaluate the role of saliva as a noninvasive alternative to serum for creatinine estimation in chronic kidney disease patients. Study Design. Case-control study. Methods. Blood and saliva samples were collected from 37 healthy individuals and 105 chronic kidney disease patients. Serum and salivary creatinine levels were estimated using automatic analyser. Statistical Analysis. The serum and salivary creatinine levels between controls and cases were compared using -test. Correlation between serum and salivary creatinine was obtained in controls and cases using Pearson correlation coefficient. Receiver operating characteristic analysis was done to assess the diagnostic performance of salivary creatinine. Cut-off values were established for salivary creatinine. Results. Serum and salivary creatinine levels were significantly higher in CKD patients than controls. The correlation was negative in controls and positive in cases. Area under the curve for salivary creatinine was found to be 0.967. A cut-off value of 0.2 mg/dL gave a sensitivity of 97.1% and specificity of 86.5%. Conclusion. Saliva can be used as a noninvasive alternative to serum for creatinine estimation. Ramesh Venkatapathy, Vasupradha Govindarajan, Nirima Oza, Sreejith Parameswaran, Balamurali Pennagaram Dhanasekaran, and Karthikshree V. Prashad Copyright © 2014 Ramesh Venkatapathy et al. All rights reserved. The Increasing Financial Impact of Chronic Kidney Disease in Australia Tue, 01 Apr 2014 16:08:07 +0000 http://www.hindawi.com/journals/ijn/2014/120537/ The aim of this investigation was to determine and compare current and projected expenditure associated with chronic kidney disease (CKD), renal replacement therapy (RRT), and cardiovascular disease (CVD) in Australia. Data published by Australia and New Zealand Dialysis and Transplant Registry, Australian Institute of Health and Welfare, and World Bank were used to compare CKD-, RRT-, and CVD-related expenditure and prevalence rates. Prevalence and expenditure predictions were made using a linear regression model. Direct statistical comparisons of rates of annual increase utilised indicator variables in combined regressions. Statistical significance was set at . Dollar amounts were adjusted for inflation prior to analysis. Between 2012 and 2020, prevalence, per-patient expenditure, and total disease expenditure associated with CKD and RRT are estimated to increase significantly more rapidly than CVD. RRT prevalence is estimated to increase by 29%, compared to 7% in CVD. Average annual RRT per-patient expenditure is estimated to increase by 16%, compared to 8% in CVD. Total CKD- and RRT-related expenditure had been estimated to increase by 37%, compared to 14% in CVD. Per-patient, CKD produces a considerably greater financial impact on Australia’s healthcare system, compared to CVD. Research focusing on novel preventative/therapeutic interventions is warranted. Patrick S. Tucker, Michael I. Kingsley, R. Hugh Morton, Aaron T. Scanlan, and Vincent J. Dalbo Copyright © 2014 Patrick S. Tucker et al. All rights reserved. Impaired Urine Dilution Capability in HIV Stable Patients Mon, 31 Mar 2014 15:16:14 +0000 http://www.hindawi.com/journals/ijn/2014/381985/ Renal disease is a well-recognized complication among patients with HIV infection. Viral infection itself and the use of some antiretroviral drugs contribute to this condition. The thick ascending limb of Henle’s loop (TALH) is the tubule segment where free water clearance is generated, determining along with glomerular filtration rate the kidney’s ability to dilute urine. Objective. We analyzed the function of the proximal tubule and TALH in patients with HIV infection receiving or not tenofovir-containing antiretroviral treatment in comparison with healthy seronegative controls, by applying a tubular physiological test, hyposaline infusion test (Chaimowitz’ test). Material & Methods. Chaimowitz’ test was performed on 20 HIV positive volunteers who had normal renal functional parameters. The control group included 10 healthy volunteers. Results. After the test, both HIV groups had a significant reduction of serum sodium and osmolarity compared with the control group. Free water clearance was lower and urine osmolarity was higher in both HIV+ groups. Proximal tubular function was normal in both studied groups. Conclusion. The present study documented that proximal tubule sodium reabsorption was preserved while free water clearance and maximal urine dilution capability were reduced in stable HIV patients treated or not with tenofovir. Waldo H. Belloso, Mariana de Paz Sierra, Matilde Navarro, Marisa L. Sanchez, Ariel G. Perelsztein, and Carlos G. Musso Copyright © 2014 Waldo H. Belloso et al. All rights reserved. The Evaluation of Red Cell Distribution Width in Chronic Hemodialysis Patients Sun, 30 Mar 2014 13:50:09 +0000 http://www.hindawi.com/journals/ijn/2014/754370/ Background. Red cell distribution width (RDW) has been used as a marker of iron deficiency; however, it is accepted as a marker of cardiovascular survival. We aimed to study RDW levels in hemodialysis (HD) patients and the association between RDW and inflammatory, nutritional, and volume markers. Methods. We included 296 HD patients with sufficient iron storage and without anemia or hypervolemia. We grouped patients into four groups according to clinical parameters, albumin, and C-reactive protein (CRP). Results. The lowest RDW levels were found in group 1 (13.2%). Although RDW of group 2 was higher than that of group 1, it was still in normal range (14.7% versus 13.2%, ). RDW levels of groups 3 (17.8%) and 4 (18.5%) were significantly higher than those of groups 1 and 2 and above normal range. A positive correlation was detected between RDW and HD duration, interdialytic weight gain (IDWG), serum phosphate, and CRP levels and a negative correlation was detected with serum albumin. HD duration, CRP, IDWG, and serum albumin have been found as independent predictors of RDW elevation. Conclusions. Results of the present study reflect adverse effects of inflammation, malnutrition, and excess IDWG on RDW elevation in an HD study cohort with sufficient iron storage and without anemia and hypervolemia. Hikmet Tekce, Buket Kin Tekce, Gulali Aktas, Mehmet Tanrisev, and Mustafa Sit Copyright © 2014 Hikmet Tekce et al. All rights reserved. The Novel Diagnostic Biomarkers for Focal Segmental Glomerulosclerosis Wed, 26 Mar 2014 13:05:39 +0000 http://www.hindawi.com/journals/ijn/2014/574261/ Background. Focal segmental glomerulosclerosis (FSGS) is a glomerular injury with various pathogenic mechanisms. Urine proteome panel might help in noninvasive diagnosis and better understanding of pathogenesis of FSGS. Method. We have analyzed the urine sample of 11 biopsy-proven FSGS subjects, 8 healthy controls, and 6 patients with biopsy-proven IgA nephropathy (disease controls) by means of liquid chromatography tandem mass spectrometry (nLC-MS/MS). Multivariate analysis of quantified proteins was performed by principal component analysis (PCA) and partial least squares (PLS). Results. Of the total number of 389 proteins, after multivariate analysis and additional filter criterion and comparing FSGS versus IgA nephropathy and healthy subjects, 77 proteins were considered as putative biomarkers of FSGS. CD59, CD44, IBP7, Robo4, and DPEP1 were the most significant differentially expressed proteins. These proteins are involved in pathogenic pathways: complement pathway, sclerosis, cell proliferation, actin cytoskeleton remodeling, and activity of TRPC6.There was complete absence of DPEP1 in urine proteome of FSGS subjects compared with healthy and disease controls. DPEP1 acts via leukotrienes on TRPC6 and results in increased podocyte motility and proteinuria. Conclusion. The results suggest a panel of candidate biomarkers for noninvasive diagnosis of FSGS, while complete absence of DPEP1 might represent a novel marker of FSGS. Mohsen Nafar, Shiva Kalantari, Shiva Samavat, Mostafa Rezaei-Tavirani, Dorothea Rutishuser, and Roman A. Zubarev Copyright © 2014 Mohsen Nafar et al. All rights reserved. Nephrogenic Systemic Fibrosis Risk and Liver Disease Sun, 23 Mar 2014 09:51:45 +0000 http://www.hindawi.com/journals/ijn/2014/679605/ Objective. Evaluate the incidence of nephrogenic systemic fibrosis (NSF) in patients with liver disease in the peritransplant period. Materials and Methods. This IRB approved study retrospectively reviewed patients requiring transplantation for cirrhosis, hepatocellular carcinoma (HCC), or both from 2003 to 2013. Records were reviewed identifying those having gadolinium enhanced MRI within 1 year of posttransplantation to document degree of liver disease, renal disease, and evidence for NSF. Results. Gadolinium-enhanced MRI was performed on 312 of 837 patients, including 23 with severe renal failure (GFR < 30 mL/min/1.73 cm2) and 289 with GFR > 30. Two of 23 patients with renal failure developed NSF compared to zero NSF cases in 289 patients with GFR > 30 (0/289; ). High dose gadodiamide was used in the two NSF cases. There was no increased incidence of NSF with severe liver disease (1/71) compared to nonsevere liver disease (1/241; ). Conclusion. Renal disease is a risk factor for NSF, but in our small sample our evidence suggests liver disease is not an additional risk factor, especially if a low-risk gadolinium agent is used. Noting that not all patients received high-risk gadolinium, a larger study focusing on patients receiving high-risk gadolinium is needed to further evaluate NSF risk in liver disease in the peritransplant period. Robert F. Hanna, Lee A. Finkelstone, Daniel S. Chow, Vesselin Z. Miloushev, Mark R. Escudero, Stephen M. Lagana, and Martin R. Prince Copyright © 2014 Robert F. Hanna et al. All rights reserved. Early Trends in Cystatin C and Outcomes in Patients with Cirrhosis and Acute Kidney Injury Tue, 18 Mar 2014 06:29:33 +0000 http://www.hindawi.com/journals/ijn/2014/708585/ Background. Acute kidney injury (AKI) is a common and severe complication in patients with cirrhosis. Progression of AKI to a higher stage associates with increased mortality. Intervening early in AKI when renal dysfunction is worsening may improve outcomes. However, serum creatinine correlates poorly with glomerular filtration in patients with cirrhosis and fluctuations may mask progression early in the course of AKI. Cystatin C, a low-molecular-weight cysteine proteinase inhibitor, is a potentially more accurate marker of glomerular filtration. Methods. We conducted a prospective multicenter study in patients with cirrhosis comparing changes in cystatin and creatinine immediately following onset of AKI as predictors of a composite endpoint of dialysis or mortality. Results. Of 106 patients, 37 (35%) met the endpoint. Cystatin demonstrated less variability between samples than creatinine. Patients were stratified into four groups reflecting changes in creatinine and cystatin: both unchanged or decreased 38 (36%) (Scr−/CysC−); only cystatin increased 25 (24%) (Scr−/CysC+); only creatinine increased 15 (14%) (Scr+/CysC−); and both increased 28 (26%) (Scr+/CysC+). With Scr−/CysC− as the reference, in both instances where cystatin rose, Scr−/CysC+ and Scr+/CysC+, the primary outcome was significantly more frequent in multivariate analysis, and , respectively. However, when only creatinine rose, outcomes were similar to the reference group. Conclusions. Changes in cystatin levels early in AKI are more closely associated with eventual dialysis or mortality than creatinine and may allow more rapid identification of patients at risk for adverse outcomes. Justin M. Belcher, Arun J. Sanyal, Guadalupe Garcia-Tsao, Naheed Ansari, Steven G. Coca, Michael G. Shlipak, and Chirag R. Parikh Copyright © 2014 Justin M. Belcher et al. All rights reserved. Protection of Liver as a Remote Organ after Renal Ischemia-Reperfusion Injury by Renal Ischemic Postconditioning Wed, 12 Mar 2014 12:43:03 +0000 http://www.hindawi.com/journals/ijn/2014/120391/ This study was designed to investigate the protective effects of local renal ischemic postconditioning (POC) on liver damage after renal ischemia-reperfusion (IR) injury. Male rats were divided into three groups  . They underwent a right nephrectomy before induction of 45 minutes of left kidney ischemia or sham operation. POC was performed by four cycles of 10 seconds of ischemia and 10 seconds of reperfusion just at the beginning of 24 hours of reperfusion. Then blood and liver samples were collected to measure serum aspartate aminotransferase (AST), alanine aminotransferase (ALT), and liver oxidative stress parameters including superoxide dismutase (SOD) activity and malondialdehyde (MDA) level. Renal IR caused a significant increase in liver functional indices as demonstrated by increased serum AST and ALT compared to sham group. These parameters reduced significantly in POC group compared to IR group. Liver MDA levels increased and SOD activity decreased in IR group compared to sham group. Induction of POC reduced the elevated liver MDA levels and increased the reduced liver SOD activity. These results revealed that renal IR injury causes liver damage as a remote organ and POC protects liver from renal IR injury by a modification in the hepatic oxidative stress status. Behjat Seifi, Mehri Kadkhodaee, Atefeh Najafi, and Atefeh Mahmoudi Copyright © 2014 Behjat Seifi et al. All rights reserved. An Update on Coronary Artery Disease and Chronic Kidney Disease Mon, 10 Mar 2014 07:06:15 +0000 http://www.hindawi.com/journals/ijn/2014/767424/ Despite the improvements in diagnostic tools and medical applications, cardiovascular diseases (CVD), especially coronary artery disease (CAD), remain the most common cause of morbidity and mortality in patients with chronic kidney disease (CKD). The main factors for the heightened risk in this population, beside advanced age and a high proportion of diabetes and hypertension, are malnutrition, chronic inflammation, accelerated atherosclerosis, endothelial dysfunction, coronary artery calcification, left ventricular structural and functional abnormalities, and bone mineral disorders. Chronic kidney disease is now recognized as an independent risk factor for CAD. In community-based studies, decreased glomerular filtration rate (GFR) and proteinuria were both found to be independently associated with CAD. This paper will discuss classical and recent epidemiologic, pathophysiologic, and clinical aspects of CAD in CKD patients. Baris Afsar, Kultigin Turkmen, Adrian Covic, and Mehmet Kanbay Copyright © 2014 Baris Afsar et al. All rights reserved. Persistent Microalbuminuria in Human Immunodeficiency Virus Infected Children in Kano, Nigeria Mon, 03 Mar 2014 08:10:54 +0000 http://www.hindawi.com/journals/ijn/2014/567838/ Microalbuminuria has been reported to be a precursor of HIV related renal disease, which if detected early and coupled with appropriate intervention may slow or retard the progress of the disease. One hundred and seventy-eight HIV infected children aged 15 years and below were recruited from the Paediatric Infectious Disease Clinic of Aminu Kano Teaching Hospital (AKTH), Kano, to determine the prevalence of persistent microalbuminuria using the albumin creatinine ratio (ACR). Early morning urine samples and spot urine samples were analyzed using a dipstick specific for microalbumin. Those who tested positive had their samples reanalyzed in the laboratory using immunometric assay and Jaffe reaction method for albumin and creatinine, respectively. Patients that had ACR of 30–300 mg/g were said to have microalbuminuria and had their urine samples retested after 6 to 8 weeks. Twelve children (6.7%) had persistent microalbuminuria and had a mean age of years, with a male to female ratio of 1 : 1. There was no significant relationship between the finding of microalbuminuria and age, sex, duration of infection, and the use of highly active antiretroviral therapy. Periodic screening for microalbuminuria using albumin specific dipstick should be considered for children with HIV infection. Abdullahi Mudi, Bashir U. Alhaj, Fatimah Hassan-Hanga, and Isah Adagiri Yahaya Copyright © 2014 Abdullahi Mudi et al. All rights reserved. Evaluation of the Prevalence of Chronic Kidney Disease and Rates of Oral Antidiabetic Prescribing in Accordance with Guidelines and Manufacturer Recommendations in Type 2 Diabetic Patients within a Long-Term Care Setting Tue, 25 Feb 2014 09:21:04 +0000 http://www.hindawi.com/journals/ijn/2014/151706/ This retrospective study assessed the prevalence of moderate to severe chronic kidney disease (CKD) among nursing home (NH) residents with type 2 diabetes. The pattern of oral antidiabetic drug (OAD) use and their concordance with the National Kidney Foundation (NKF) guideline and prescribing information (PI) was also assessed. About half (47%) of diabetic residents had moderate to severe CKD. A little over a quarter of the 186 residents using OADs received at least one NKF-discordant OAD prescription. Metformin was the most commonly misused OAD. PI nonconcordance was observed in 58.6% of residents and was highest in glipizide and metformin users. With the high prevalence of moderate to severe CKD in NH residents with diabetes, physicians should consider residents’ renal function when choosing treatment plans and review treatments regularly to check compliance with the NKF guidelines or PIs. Ning Wu, Xia Yu, Mallik Greene, and Gary Oderda Copyright © 2014 Ning Wu et al. All rights reserved. The Effects of Helicobacter pylori Eradication on Proteinuria in Patients with Primary Glomerulonephritis Mon, 24 Feb 2014 12:11:00 +0000 http://www.hindawi.com/journals/ijn/2014/180690/ Background. Membranous nephropathy (MN) is a common cause of nephrotic syndrome. In most cases it is idiopathic, while it may also be secondary to many diseases. In this study, prevalence of H. pylori infection and the effects of H. pylori eradication on proteinuria levels were investigated. Methods. Thirty five patients with MN (19 male), 12 patients with IgA nephropathy (4 male) and 12 patients with focal segmental glomerulosclerosis (FSGS) (8 male) were studied. The presence of H. pylori antigen was investigated in renal tissues obtained by biopsy, and the effects of H. pylori eradication on proteinuria levels were investigated. Results. Immunohistochemistry with H. pylori antigen revealed no positive staining in the glomeruli of all patients. 19 patients (54%) with MN, 10 (83%) with IgA nephropathy and 4 (33%) with FSGS were positive for H. pylori stool antigen test . Patients with H. pylori infection were administered eradication therapy (lansoprazole, 30 mg twice daily, plus amoxicillin, 0.75 g twice daily, plus clarithromycin, 250 mg twice daily, for 14 days). Before the eradication therapy the mean proteinuria of patients with MN, IgA nephropathy and FSGS were 2.42 ± 3.24 g/day, 2.12 ± 1.63 g/day and 1.80 ± 1.32 g/day, respectively. Three months after eradication, baseline proteinuria levels of patients with MN significantly decreased to 1.26 ± 1.73 g/day . In all three groups there were no significant differences with regard to serum creatinine, albumin and C-reactive protein levels before and after eradication therapy. Conclusions. The eradication of H. pylori infection may be effective to reduce proteinuria in patients with MN, while spontaneous remission of MN could not be excluded in this patient cohort. This trial is registered with NCT00983034. Bahar Caliskan, Halil Yazici, Yasar Caliskan, Yasemin Ozluk, Mine Gulluoglu, Isin Kilicaslan, Aydin Turkmen, and Mehmet Sukru Sever Copyright © 2014 Bahar Caliskan et al. All rights reserved. Mucormycosis in a Renal Transplant Recipient: Case Report and Comprehensive Review of Literature Wed, 12 Feb 2014 11:25:01 +0000 http://www.hindawi.com/journals/ijn/2014/950643/ Mucormycosis is a rare but devastating infection. We present a case of fatal disseminated mucormycosis infection in a renal transplant patient. Uncontrolled diabetes mellitus and immunosuppression are the major predisposing factors to infection with Mucorales. Mucorales are angioinvasive and can infect any organ system. Lungs are the predominant site of infection in solid organ transplant recipients. Prompt diagnosis is challenging and influences outcome. Treatment involves a combination of surgical and medical therapies. Amphotericin B remains the cornerstone in the medical management of mucormycosis, although other agents have been used. Newer agents are promising. Tamim Hamdi, Vanji Karthikeyan, and George J. Alangaden Copyright © 2014 Tamim Hamdi et al. All rights reserved. Cystatin C as a Predictor of Mortality and Cardiovascular Events in a Population with Chronic Kidney Disease Tue, 11 Feb 2014 12:18:14 +0000 http://www.hindawi.com/journals/ijn/2014/127943/ Background. We examine whether cystatin C, a surrogate marker of renal function, could identify patients with chronic kidney disease (CKD) with an increased risk of renal disease progression, death, or cardiovascular events. Methods. Data were obtained for 180 patients, with a diagnosis of chronic renal failure based on serum creatinine estimated glomerular filtration rate (eGFRcreat) <90 mL/min/1.73 m2. This population was grouped in tertiles according to cystatin C and creatinine values at baseline. Cardiovascular events and overall mortality were estimated for each tertile. Predictors of overall mortality and for the development of renal disease progression were analyzed. Results. The median age was 75 years (interquartile range 69–82) and the median eGFRcreat 38 mL/min m2 (interquartile range 33–49). Overall mortality was lower on the first and on the second tertiles of cystatin C than on the third one (HR = 0.060; 95% CI: 0.008–0.447 and HR = 0.094; 95% CI: 0.022–0.406, resp.). Deaths related to the creatinine tertiles followed the same pattern, but differences were not as large. Cardiovascular mortality was lower on the second than on the third cystatin C tertile (HR = 0.198; 95% CI: 0.040–0.987), but it did not show differences on the first and the second creatinine tertiles compared with the third one (HR = 0.126; 95% CI: 0.013–1.265 and HR = 0.403; 95% CI: 0.093–1.740). The only independent predictors of mortality during followup were baseline cystatin C (OR = 0.100; 95% CI: 0.021–0.463) and baseline uric acid (OR = 1.377; 95% CI: 1.070–1.773). Conclusion. Cystatin C may be an alternative to creatinine for detecting a high risk of death and cardiovascular events in a population with CKD. Ana Vigil, Emilia Condés, Luis Vigil, Paloma Gallar, Aniana Oliet, Olimpia Ortega, Isabel Rodriguez, Milagros Ortiz, Juan Carlos Herrero, Carmen Mon, Gabriela Cobo, and Juana Jimenez Copyright © 2014 Ana Vigil et al. All rights reserved. Acute Kidney Injury in Lymphoma: A Single Centre Experience Mon, 03 Feb 2014 11:44:07 +0000 http://www.hindawi.com/journals/ijn/2014/272961/ Background. Acute kidney injury (AKI) is a common but least studied complication of lymphoma. Objective. To determine the frequency and predictors of AKI in lymphoma and to study the impact of AKI on hospital stay and mortality. Methods. Retrospective review of medical records of hospitalized lymphoma patients aged ≥14 years between January 2008 and December 2011 was done. Results. Out of 365 patients, AKI was present in 31.8% (116/365). Multivariate logistic regression analysis showed that independent predictors for AKI included sepsis (odds ratio (OR) 3.76; 95% CI 1.83–7.72), aminoglycosides (OR 4.75; 95% CI 1.15–19.52), diuretics (OR 2.96; 95% CI 1.31–6.69), tumor lysis syndrome (OR 3.85; 95% CI 1.54–9.59), and R-CVP regimen (OR 4.70; 95% CI 1.20–18.36). AKI stages 2 and 3 was associated with increased hospital stay (OR 2.01; 95% CI 1.19–3.40). Conclusion. AKI was significantly associated with sepsis, aminoglycoside, diuretics, presence of tumor lysis syndrome, and use of R-CVP regimen. Presence of AKIN (Acute Kidney Injury Network) stages 2 and 3 AKI had increased hospital stay. AKI was also associated with increased mortality. Muhammad Abdul Mabood Khalil, Hira Latif, Abdur Rehman, Waqar Uddin Kashif, Safia Awan, Zarghona Khalil, Uziar Mushtaq, Maria Ahmad, Muhammad Ashhad Ullah Khalil, Manickam Ranga Sami, and Jackson Tan Copyright © 2014 Muhammad Abdul Mabood Khalil et al. All rights reserved. Antibiogram for Haemodialysis Catheter-Related Bloodstream Infections Wed, 22 Jan 2014 13:15:25 +0000 http://www.hindawi.com/journals/ijn/2014/629459/ Background. Haemodialysis (HD) catheter-related bloodstream infections (CRBSIs) are a major complication of long-term catheter use in HD. This study identified the epidemiology of HD CRBSIs and to aid in the choice of empiric antibiotics therapy given to patients with HD CRBSIs. Methods. Patients with HD CRBSIs were identified. Their blood cultures were performed according to standard sterile technique. Specimens were sent to the microbiology lab for culture and sensitivity testing. Results were tabulated in antibiograms. Results. 18 patients with a median age of 61.0 years (IQR: 51.5–73.25) were confirmed to have HD CRBSIs based on our study criteria. Eight (44.4%) patients had gram-negative infections, 7 (38.9%) patients gram-positive infections, and 3 (16.7%) patients had polymicrobial infections. We noted that most of the gram-negative bacteria were sensitive to ceftazidime. Unfortunately, cloxacillin resistance was high among gram-positive organisms. Coagulase-negative Staphylococcus and Bacillus sp. were the most common gram-positive organisms and they were sensitive to vancomycin. Conclusion. Our study revealed the increased incidence of gram-negative organism in HD CRBSIs. Antibiogram is an important tool in deciding empirical antibiotics for HD CRBSIs. Tailoring your antibiotics accordingly to the antibiogram can increase the chance of successful treatment and prevent the emergence of bacterial resistance. Abdul Halim Abdul Gafor, Pau Cheong Ping, Anis Farahanum Zainal Abidin, Muhammad Zulhilmie Saruddin, Ng Kah Yan, Siti Qania’ah Adam, Ramliza Ramli, Anita Sulong, and Petrick Periyasamy Copyright © 2014 Abdul Halim Abdul Gafor et al. All rights reserved. Oral Postdialysis Cholecalciferol Supplementation in Patients on Maintenance Hemodialysis: A Dose-Response Approach Tue, 21 Jan 2014 13:10:31 +0000 http://www.hindawi.com/journals/ijn/2014/597429/ The aim of the present study was to evaluate the dose of postdialysis cholecalciferol needed to maintain the 25-hydroxyvitamin D [25(OH)D] levels in the optimal range of 75–150 nmol/L. Twenty-six patients who had low baseline 25(OH)D levels (mean  nmol/L) were studied. The 25(OH)D levels were measured every 2 months for one year. During the first two months, all the patients received 2000 IU of cholecalciferol after each hemodialysis (=6000 IU/wk). Thereafter, the dose was individualized and adapted every 2 months by administering 1 to 6 cholecalciferol tablets (2000 IU each) per week (total weekly dose = 2000–12000 IU/wk). During cholecalciferol supplementation, the 25(OH)D concentrations rapidly increased from baseline to  nmol/L at month 6 and  nmol/L at month 12. At month twelve, 86% of the patients had 25(OH)D levels within the target range with a mean dose of  IU/wk of cholecalciferol; however, the amount needed to maintain these levels varied widely from 0 () to 12000 IU/wk (). In conclusion, postdialysis cholecalciferol prescription is quite effective in correcting vitamin D deficiency/insufficiency, but the amount of cholecalciferol needed to maintain the 25(OH)D levels within the optimal range over the long-term varies widely among patients and must be individualized. Eric Descombes, Benoit Fellay, Ould Maouloud Hemett, Jean-Luc Magnin, and Gilbert Fellay Copyright © 2014 Eric Descombes et al. All rights reserved. Values of Alpha 1 Microglobulin Does Not Differ between Individuals with and without Family History of Balkan Endemic Nephropathy Sun, 19 Jan 2014 12:43:25 +0000 http://www.hindawi.com/journals/ijn/2014/284293/ Aim. The aim of this study was to compare urinary alpha 1 microglobulin (A1MG) in healthy individuals with and without family burden for Balkan endemic nephropathy (BEN) in an endemic village. Methods. Otherwise healthy inhabitants with microalbuminuria or proteinuria were divided into two groups: with () and without () family BEN burden and screened for urinary A1MG and A1MG/urine creatinine ratio. Results. Average value of urinary A1MG was  mg/L in group with and  mg/L in group without family history for BEN (NS, ). A1MG was higher than 10 mg/L in eight (33.33%) inhabitants with family history and in 12 (37.5%) without (NS, ). Average values of urinary A1MG/creatinine ratio were and in group with and group without family BEN history (NS, , resp.). Elevated values of this ratio were found in 13 (54.17%) inhabitants with and 14 (43.75%) without family history for BEN (NS, ). Conclusion. We did not find statistically significant difference in the examined markers between healthy individuals with and without family burden for BEN. We concluded that these markers are not predictive of risk for BEN. Mirna Aleckovic-Halilovic, Enisa Mesic, Senaid Trnacevic, Emir Hodzic, Vildana Habul, Mirza Atic, Maida Dugonjic, and Evlijana Hasanovic Copyright © 2014 Mirna Aleckovic-Halilovic et al. All rights reserved. Peritoneal Equilibration Test in Costa Rica: Discrepancies from Other Populations Thu, 02 Jan 2014 16:13:57 +0000 http://www.hindawi.com/journals/ijn/2014/326163/ Objective. Continuous Ambulatory Peritoneal Dialysis (CAPD) is a kidney replacement therapy that has been recently incorporated in developing countries. We aim to establish our reference values, to compare them with the original and the Mexican population, and to associate some variables with the type of peritoneal transport. Methods. Thirty peritoneal equilibration tests (PET) were performed. The ratio for D/P creatinine and the D/D0 ratio for glucose were calculated and compared to reference values. We conducted a retrospective analysis to correlate peritoneal transporters with some predictive variables. Results. D/P creatinine ratio at 2 hours, D/D0 glucose ratio at 4 hours, and net ultrafiltrate volume (nUFV) were significantly different from those reported by Twardowski et al. The results documented in the Mexican population only coincide with our results for the D/P creatinine ratio at 4 hours. Any of the studied variables were associated with a specific type of peritoneal transport. Conclusions. Peritoneal permeability among Costa Rican CAPD patients is different from the original population described by Twardowski et al. and from other Latin-American population. This supports the theory that ethnical differences could be responsible for such variations and they validate our statement that each region should possess value references of their own. Marta Avellan-Boza, Fabio Hernández, and Allan Ramos-Esquivel Copyright © 2014 Marta Avellan-Boza et al. All rights reserved. Microalbuminuria, Kidney Function, and Daily Physical Activity Thu, 26 Dec 2013 18:21:00 +0000 http://www.hindawi.com/journals/ijn/2013/248416/ The present study was carried out to investigate independent relationship between daily physical activity, microalbuminuria, and kidney function. The demographic characteristics and laboratory parameters were recorded for all patients. The determination of daily activities was carried out by Nottingham Extended Activities of Daily Living Scale (NEADLS) which was performed for each patient in an interview. Totally 139 patients were enrolled. In the whole group NEADLS score was correlated with age (rho: −0.759, ), clinical systolic blood pressure (rho: −0.212, : 0.018), blood urea nitrogen (rho: −0.516, ), creatinine (rho: −0.501, ), uric acid (rho: −0.308, ), albumin (rho: 0.382, ), total cholesterol (rho: −0.194, : 0.022), LDL-cholesterol (rho: −0.230, : 0.008), hemoglobin (rho: 0.256, : 0.002), creatinine clearance (rho: 0.565, ), 24-hour urinary protein excretion (rho: −0.324, ), and 24-hour urinary albumin excretion (UAE) (rho: −0.483, ). The multivariate linear regression of independent factors corelated with logarithmically converted NEADLS score (as a dependent variable) has shown that age (), presence of coronary artery disease (: 0.011), hemoglobin (: 0.020), 24-hour creatinine clearance (: 0.004), and 24-hour urinary albumin excretion () were independently corelated with NEADLS score. In conclusion, both UAE and kidney function were independently associated with daily physical activity. Baris Afsar Copyright © 2013 Baris Afsar. All rights reserved. Prevalence and Predictors of Urinary Tract Infections among Children with Cerebral Palsy in Makurdi, Nigeria Mon, 25 Nov 2013 17:02:32 +0000 http://www.hindawi.com/journals/ijn/2013/937268/ Background. Children with cerebral palsy (CP) are prone to urinary tract infection (UTI). Methods/Objectives. The prevalence and the predictors of UTI among children with CP were compared to age- and sex-matched children without CP at Federal Medical Centre, Makurdi, Nigeria, from December 2011 to May 2013. Results. The age range was between 2 and 15 years with a mean age of years including 30 males and 22 females. UTI was confirmed in 20 (38.5%) CP children compared to 2 children (3.8%) without CP ( value 0.000). Among CP children, Escherichia coli was the commonest organism isolated in 9 (9/20, 45.0%), Streptococcus faecalis in 4 (20.0%), and Staphylococcus aureus in 3 (15%), while both Proteus spp. and Klebsiella spp. were isolated in 2 children (10.0%) each. Escherichia coli was also found in the 2 children without CP. All the organisms were resistant to cotrimoxazole, nalidixic acid, nitrofurantoin, and amoxiclav, while they were 100% sensitive to ceftriaxone and the quinolones. In a univariate regression analysis, only moderate to severe gross motor dysfunction predicted the risk of UTI (, 95% CI, 2.27–1324.00, value 0.014). Conclusion. Efforts should be put in place to aid mobility among CP children in order to reduce the risk of UTI. Emmanuel Adémólá Anígilájé and Terkaa Terrumun Bitto Copyright © 2013 Emmanuel Adémólá Anígilájé and Terkaa Terrumun Bitto. All rights reserved. Constitutional Nephrin Deficiency in Conditionally Immortalized Human Podocytes Induced Epithelial-Mesenchymal Transition, Supported by -Catenin/NF-kappa B Activation: A Consequence of Cell Junction Impairment? Sun, 24 Nov 2013 13:35:17 +0000 http://www.hindawi.com/journals/ijn/2013/457490/ The kidney glomerular podocytes are the cellular target of many chronic nephropathies both determined and acquired genetically. Mutations that affected the expression and/or the function of nephrin, a key component of the slit-diaphragm, are often causes of these pathologies. Recent findings showed that murine podocytes could undergo epithelial-mesenchymal transformation (EMT), suggesting new hypotheses about the pathogenesis of glomerular fibrosis. Here, we show that also human podocytes can undergo EMT, but more importantly nephrin ablation itself can trigger this phenotypic transformation. In fact, a model of human podocyte with engineered nephrin deficiency constitutionally expressed high levels of -SMA, vimentin, fibronectin, and other hallmarks of EMT. Since it is known that cell contact abrogation is one of the triggers of EMT, we reasoned that nephrin loss could account for such cell junction disruption and cause the EMT. Therefore, we demonstrated that also normal podocytes could spontaneously undergo EMT if grown in Ca2+-free medium, which is known to impair cell contacts. The analysis of the main intracellular signal transduction pathways evidenced some major anomalies consequent with the nephrin abrogation. The most intriguing was the activation of -catenin pathway, which plays a critical role in podocyte ontogenesis as well as in the nephrin expression and EMT regulation. Also other important signaling proteins, like NF-B, p53, and retinoblastoma protein (RB), showed important activity modifications. Interestingly, most of the above indicated signaling pathway alterations were again reproducible by cell junction rupture, induced by Ca2+ deprivation. Finally, immunofluorescence analysis on kidney sections of patients with NS of Finnish type confirmed the constitutive expression of -SMA. Gian Marco Ghiggeri, Maddalena Gigante, and Armando Di Donato Copyright © 2013 Gian Marco Ghiggeri et al. All rights reserved. Peritoneal Dialysis—Moving from Current Status to the Future Thu, 24 Oct 2013 16:01:27 +0000 http://www.hindawi.com/journals/ijn/2013/530713/ Kook-Hwan Oh, Yong-Lim Kim, Wai-Kei Lo, and Peter J. Margetts Copyright © 2013 Kook-Hwan Oh et al. All rights reserved. Impact of Peritoneal Dialysis Treatment on Arterial Stiffness and Vascular Changes in Diabetic Type 2 and Nondiabetic Patients with End-Stage Renal Disease Tue, 22 Oct 2013 09:58:37 +0000 http://www.hindawi.com/journals/ijn/2013/681454/ Diabetes mellitus (DM) is the leading cause of the end-stage renal disease (ESRD). Vascular diseases are the most common cause of morbidity and mortality in the chronic kidney disease. The aim of this study was to analyze the impact of peritoneal dialysis (PD) treatment on morphologic and hemodynamic vascular parameters of carotid arteries in diabetic type 2 and nondiabetic patients with ESRD during the period of one year after the start of PD treatment using ultrasonography of carotid arteries and their relation on uremia and PD inherent factors. Mean intima-media thickness, plaque score, peak systolic velocity, end-diastolic velocity, and carotid diameter significantly decreased 12 months after PD treatment start in both groups. Significant reduction in median serum endothelin-1 concentration after 12 months on PD treatment was observed in the group of patients with DM (7.6–5.9 pg/mL) and also in group of patients without DM (3.6–3.3 pg/mL). Also median nitric oxide concentration significantly increased after 12 months on PD compared to baseline levels both in patients with DM (25.0–34.3 μmol/L) as was observed in patients without DM (49.6–56.5 μmol/L). PD treatment, with the regulation of these vasoactive molecules and other vascular risk factors, significantly contributes to vascular remodeling, especially in DM patients. Damir Rebić, Senija Rašić, and Velma Rebić Copyright © 2013 Damir Rebić et al. All rights reserved. The Relationship between Carotid Atherosclerosis, Inflammatory Cytokines, and Oxidative Stress in Middle-Aged and Elderly Hemodialysis Patients Wed, 25 Sep 2013 17:57:05 +0000 http://www.hindawi.com/journals/ijn/2013/835465/ Objective. To identify the relationship between microinflammation, oxidative stress, and carotid arterial stiffness in hemodialysis patients. Methods. The CAS β and PWV obtained by ultrasound technology were used to assess carotid arterial stiffness. We divided the patients into either the CAS group or the non-CAS group based on the presence or absence of CAS. The parameters of ALB, Ca, P, TC, HDL, LDL, TG, glucose, creatinine, and hs-CRP levels were routinely tested in both groups of patients. The levels of TNF-α, IL-6, and 8-isoprostane F2α were measured by ELISA. Results. A total of 42 patients were enrolled in the CAS group and 20 patients were enrolled in the non-CAS group. No significant differences between the CAS group and the non-CAS group were observed with respect to age, dialysis duration, DBP, BUN, Cr, TC, TG, HDL, LDL, and Hb. However, SBP , pulse pressure, and 8-isoprostane levels of the CAS group were higher than those of the non-CAS group. The hs-CRP, TNF-α, and IL-6 levels were elevated in both groups but showed no significant differences. Conclusions. Maintenance of hemodialysis patients exhibits a microinflammatory state that may lead to atherosclerosis. The roles of hypertension and oxidative stress may be more important. Hongqi Ren, Xuan Zhou, Zhiyong Luan, Xiaomei Luo, Shujing Han, Qing Cai, Wang Rui, and Yan Li Copyright © 2013 Hongqi Ren et al. All rights reserved. Effect of Intensive Blood Pressure Control on Cardiovascular Remodeling in Hypertensive Patients with Nephrosclerosis Wed, 11 Sep 2013 09:46:48 +0000 http://www.hindawi.com/journals/ijn/2013/120167/ Pulse pressure (PP), a marker of arterial system properties, has been linked to cardiovascular (CV) complications. We examined (a) association between unit changes of PP and (i) composite CV outcomes and (ii) development of left-ventricular hypertrophy (LVH) and (b) effect of mean arterial pressure (MAP) control on rate of change in PP. We studied 1094 nondiabetics with nephrosclerosis in the African American Study of Kidney Disease and Hypertension. Subjects were randomly assigned to usual MAP goal (102–107 mmHg) or a lower MAP goal (≤92 mmHg) and randomized to beta-blocker, angiotensin converting enzyme inhibitor, or calcium channel blocker. After covariate adjustment, a higher PP was associated with increased risk of CV outcome (RR = 1.28, CI = 1.11–1.47, ) and new LVH (RR = 1.26, CI = 1.04–1.54, ). PP increased at a greater rate in the usual than in lower MAP groups (slope ± SE: 1.08 ± 0.15 versus 0.42 ± 0.15 mmHg/year, ), but not by the antihypertensive treatment assignment. Observations indicate that control to a lower MAP slows the progression of PP, a correlate of cardiovascular remodeling and complications, and may be beneficial to CV health. Otelio Randall, John Kwagyan, Tamrat Retta, Kenneth Jamerson, Velvie Pogue, Keith Norris, Muluemebet Ketete, Shichen Xu, Tom Greene, Xuelei Wang, and Lawrence Agodoa Copyright © 2013 Otelio Randall et al. All rights reserved. Developmental Origins of Chronic Renal Disease: An Integrative Hypothesis Thu, 29 Aug 2013 09:46:33 +0000 http://www.hindawi.com/journals/ijn/2013/346067/ Cardiovascular diseases are one of the leading causes of mortality. Hypertension (HT) is one of the principal risk factors associated with death. Chronic kidney disease (CKD), which is probably underestimated, increases the risk and the severity of adverse cardiovascular events. It is now recognized that low birth weight is a risk factor for these diseases, and this relationship is amplified by a rapid catch-up growth or overfeeding during infancy or childhood. The pathophysiological and molecular mechanisms involved in the “early programming” of CKD are multiple and partially understood. It has been proposed that the developmental programming of arterial hypertension and chronic kidney disease is related to a reduced nephron endowment. However, this mechanism is still discussed. This review discusses the complex relationship between birth weight and nephron endowment and how early growth and nutrition influence long term HT and CKD. We hypothesize that fetal environment reduces moderately the nephron number which appears insufficient by itself to induce long term diseases. Reduced nephron number constitutes a “factor of vulnerability” when additional factors, in particular a rapid postnatal growth or overfeeding, promote the early onset of diseases through a complex combination of various pathophysiological pathways. F. Boubred, M. Saint-Faust, C. Buffat, I. Ligi, I. Grandvuillemin, and U. Simeoni Copyright © 2013 F. Boubred et al. All rights reserved.