Treatment of Yunnan Baiyao plus Kangfuxin Solution Reduces Inflammatory Response and Prevents Patients with Nasopharyngeal Carcinoma against Radiation-Induced Oral Mucositis

Tang, Xiuyu; Sun, Jiahui; Deng, Jie; Shi, Bin

doi:https://doi.org/10.1155/2021/9973539

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Volume 2021 | Article ID 9973539 | https://doi.org/10.1155/2021/9973539

Treatment of Yunnan Baiyao plus Kangfuxin Solution Reduces Inflammatory Response and Prevents Patients with Nasopharyngeal Carcinoma against Radiation-Induced Oral Mucositis

Xiuyu Tang,¹Jiahui Sun,¹Jie Deng,¹and Bin Shi¹

Academic Editor: Songwen Tan

Received25 Mar 2021

Accepted27 Apr 2021

Published17 May 2021

Abstract

Oral mucositis refers to secondary mucosal damage, which usually occurs during cancer treatment. Generally, patients with head and neck cancers receiving radiotherapy will develop mucositis. Oral mucositis usually begins with mucosal inflammation and is characterized by erythema and confluent ulcers. The purpose of the study is to explore the therapeutic effects of Yunnan Baiyao combined with Kangfuxin solution on radiation-induced oral mucositis and the influence on production of inflammatory factors in patients with nasopharyngeal carcinoma (NPC) after radiotherapy. Clinical variables of 90 NPC patients were retrospectively analyzed. All patients underwent combined treatment (normal saline and inhalation of dexamethasone, gentamicin, and vitamin B₁₂) 1^st after radiotherapy, among which 45 patients received additional treatment of Yunnan Baiyao plus Kangfuxin solution and assigned as the study group. We found that additional treatment of Yunnan Baiyao plus Kangfuxin solution remarkably attenuated pain and dry mouth and reduced the degree of mucosal hyperaemia, edema, and ulceration in NPC patients undergoing radiotherapy (). It was also found that additional treatment of Yunnan Baiyao plus Kangfuxin solution notably inhibited the release of inflammatory factors and cancer-related markers, as evidenced by lower serum levels of C-reactive protein (CRP), tumor necrosis factor-α (TNF-α), interleukin-1 (IL-1), matrix metalloproteinase-9 (MMP-9), serum hypoxia-inducible factor-1 α (HIF-1α), and vascular endothelial growth factor (VEGF) detected in the study group than the control group (). Additionally, the numbers of CD⁺³ and CD⁺⁴ subpopulations of T lymphocytes and the ratio of CD⁺⁴/CD⁺⁸ in the study group were significantly higher than those in the control group (), and the number of CD⁺⁸ subpopulations in the study group was significantly lower than those in the control group (). In conclusion, these results indicated that additional treatment of Yunnan Baiyao plus Kangfuxin solution reduces inflammatory response and prevents patients with NPC against radiation-induced oral mucositis.

1. Introduction

Nasopharyngeal carcinoma (NPC) is a common head and neck cancer in Southeast Asia and South China, which has distinct ethnic and regional distribution characteristics [1]. At present, most patients are diagnosed with local advanced or late stage, about 90% of cases are diagnosed as lymph node metastasis, and about 5-10% of patients have distant metastasis [2]. NPC has unique clinical biological profiles such as associated Epstein-Barr virus infection and high radiosensitivity. Radiotherapy has long been recognized as the mainstay for the treatment of NPC [3]. Although intensity-modulated radiotherapy combined with radiotherapy can control primary NPC, local recurrence and distant metastasis are still the main obstacles to the success of NPC treatment [4]. Additionally, radiation can not only kill malignant tumor cells but also damage normal cells in radiation field and its surrounding area. Oral mucosa is stratified squamous epithelium with rapid renewal and high radiosensitivity. Oral mucositis is a common adverse reaction of NPC after radiotherapy [5]. Radiotherapy-induced oral mucositis are characterized by dry mouth, taste dysfunction, oral mucosal congestion, edema, erosion, and ulcer, which seriously affect the patient’s eating function, eventually lead to malnutrition and electrolyte disorder [6]. Currently, there are effective mucoprotective strategies for the management of oral mucositis. Severe mucositis can not only affect a patients’ quality of life but also result in requirements for narcotic analgesics, total parenteral nutrition, interruption of cancer therapy, prolong hospitalization, and increases of the risk of local and systemic infection [7]. Accumulating evidence has suggested that the pathogenesis of oral mucositis is associated with a cascade of inflammatory events, which chronologically consist of five continuous overlapping phases: initiation, upregulation of inflammation, signaling and amplification, ulceration, and finally, wound healing [8, 9]. Oral mucositis caused by radiotherapy and chemotherapy is easy to diagnose but difficult to cure, and in recent years, a variety of medicines have been applied to the prevention and treatment of oral mucositis, but medicines with definite clinical recommended efficacy need to be developed or discovered [10]. Yunnan Baiyao (YNBY), as traditional Chinese medicine, has been attached great importance for hundreds of years, which has significant clinical efficacy in the aspects of hemostasis, improving blood circulation and dispersing blood stasis and anti-inflammation [11, 12]. Kangfuxin solution was extracted from cockroaches, which was defined as Chinese herbal medicine, and studies have indicated that Kangfuxin solution can maintain normal cell function by inhibiting the opening of calcium-dependent potassium channels caused by radiation injury, so as to reduce the pain and discomfort of patients after radiotherapy and chemotherapy [13]. The present study investigates preventive and therapeutic effects of Yunnan Baiyao combined with Kangfuxin solution on radiation-induced oral mucositis and the influence on serum levels of inflammatory factors in patients with NPC after radiotherapy.

2. Material and Method

2.1. Patient Selection and Distribution

A total of 90 patients with NPC treated with initial radiotherapy in our hospital were retrospectively analyzed form January 2013 to December 2016. They were divided into study group and control group with 45 cases, respectively, and there were 26 males and 19 females in study group who diagnosed pathologically as squamous cell carcinoma, the age ranged from 34 to 67 years old, with an average age of )years. The Karnofsky Performance Scale (KPS) score was before radiotherapy, and the prescribed radiation dose was . There were 23 males and 23 females in the control group which diagnosed pathologically as squamous cell carcinoma, the age ranged from 37 to 69 years old, with an average age of years. The KPS score was before radiotherapy, and the prescribed radiation dose was . There was no significant difference in age, gender, pathological type, KPS score, and radiation dose between the two groups (). The eligible study subjects should meet the following inclusion criteria: (a) diagnosed with NPC by pathological examination; (b) aged from 18 to 69 years old; (c) initially diagnosed as NPC and pathologically defined as squamous cell carcinoma; (d) be treated with 30 times of radiotherapy with 70-74 Gy radiation dose each time; (e) the before radiotherapy; (f) occurrence of grade I oral mucosal during radiotherapy; (g) the , , , ; (h) informed consent was signed. The patients were consistent with any of the below criteria should be excluded: (a) grade II or more oral mucosal reaction occurred during radiotherapy; (b) medical history of radiotherapy to the face and neck; (c) radiotherapy and chemotherapy history of other tumors; (d) complicated by other oral diseases before radiotherapy; (e) immune deficiency; (f) allergic reaction to the drugs in this study; (g) negative treatment compliance; (h) special populations during pregnancy and lactation. Figure 1 shows the screening process of eligible study subjects. The study was approved by the Medical Ethics Committee of our hospital.

2.2. Treatment Procedures

All patients were fixed under the simulator and treated with intensity-modulated radiotherapy (IMRT) with Siemens high-energy linear accelerator. The radiation dose ranged from 60 Gy to 70 Gy, and the single dose was 2 Gy with 5 days a week. At the first day of radiotherapy, local application of physiological saline combined with dexamethasone, gentamicin, and vitamin B₁₂ was used to the control group: dexamethasone 5 mg, gentamicin 160,000 u, and vitamin B 12 mg were added into 100 mL of physiological saline as atomization inhalation for 15minutes each time and twice a day, while Yunnan Baiyao (Yunnan Baiyao Group Co., Ltd., National Medicine Permission Number: Z53020798, specification: 4 g) as oral administration and Kangfuxin solution (Inner Mongolia Dual Fufangtai Pharmaceutical Co., Ltd, National Medicine Permission Number: Z15020805, specification: ) for gargling and local application of physiological saline combined with dexamethasone, gentamicin, and vitamin B₁₂ for atomization inhalation were applied to the study group. The atomization method was the same as that of the control group, Kangfuxin solution 10 mL was used to gargle for 2 minutes to make it fully contact with the surface of oral mucosa after cleaning the oral cavity in the morning and evening, and food and water should not be eaten after gargling within 1 hour. Yunnan Baiyao powder was orally administrated, with 0.5 g once and 3 times a day. Fish and bean products were forbidden during medication. The treatment started from the beginning of radiotherapy to the 7 days after the radiotherapy. There were no adverse reactions in the course of medication in the study group and the control group.

2.3. Classification of Radiation-Induced Oral Mucositis

The classification of radiation-induced oral mucositis was made based on radiation therapy oncology group (RTOG) [14], which was detailed in Table 1. In addition, patient outcome was also analyzed by scoring symptoms including pain, mucosal hyperaemia and edema, mucosal ulceration, and dry mouth. The total score, respectively, was 0-6 points for each symptom. The lower the score was, the better the efficacy was.

2.4. Serum Extraction

Two tubes of fasting venous blood (5 mL) were collected from each patient, and blood collection was performed twice before and after treatment. The blood samples were refrigerated under 4°C for 45 minutes and centrifuged with 3500 r/min for 15 min. The serum was extracted from testing tube, which was immediately stored in a low-temperature refrigerator (MDF-U5412, SANYO, Japan) at -80°C.

2.5. Reagents and Cytokine Determination

Cytokine detection in the serum was achieved by commercial kits (RapidBio, West Hills, CA, USA; C-reactive protein (CRP), tumor necrosis factor-α (TNF-α), interleukin-1 (IL-1), matrix metalloproteinase-9 (MMP-9), hypoxia-inducible factor-1 α (HIF-1α), and vascular endothelial growth factor (VEGF)). Serum cytokine measurement was performed using an enzyme-linked immunosorbent assay (ELISA) method as specified by the kit manufactures at test and reference wavelengths of 450 and 550 nm, respectively. The results were expressed in mg/L, μg/L, or ng/L and relative to standard curves obtained from titrations of the corresponding recombinant factors provided the kit manufactures. The manufacturers guarantee the specificity of each individual kit.

2.6. Flow Cytometric Analysis of T Cell Subpopulation

Venous blood (2 mL) was extracted into EDTA anticoagulant tube and centrifuged with lymphocyte separation solution (2 mL) at the speed of 1500 r/min for 10 minutes so as to collect the layer containing lymphocyte, which was rinsed with 2 mL phosphate-buffered solution (PBS), and centrifuged twice at the same speed and time to discard the supernatant. The final cell suspension was divided into two test tubes with 5 mL volumes, respectively, and have them made with the concentration of . Four test tubes were added with lymphocyte cell suspension 500 μL, respectively, the monoclonal antibody (McAb) of mouse anti-human CD⁺³, CD⁺⁴, and CD⁺⁸ (120 μL), all conjugated with fluorescin isothiocyanate (FITC) and analyzed by flow cytometry (FAC Scan, BD Pharmingen, U.S), and McAb of mouse anti-human IgG in positive control (120 μL), which was examined by BIO450 enzyme-labelled instrument, and kept the solution away from light for 30 minutes. Centrifugation was performed again at the speed of 2000 R/min maintaining 15 minutes and rinsed with 2 mL PBS, and the above two procedures were performed one more time to get the supernatant but discarded it; finally, PBS 500 μL was added into the solution. All data were analyzed by CellQuest Plot software.

2.7. Statistical Analysis

All data were processed by the SPSS 23.0 software. The measurement data were defined as and analyzed by the -test. The counting data were described by ratio or percentage and analyzed by the chi-square test. A level of was considered statistically significance.

3. Result

3.1. Yunnan Baiyao plus Kangfuxin Solution Relieved the Symptoms of Irradiation-Induced Oral Mucositis

We first scored 90 NPC patients about their symptoms of oral mucositis including pain, mucosal hyperaemia and edema, mucosal ulceration, and dry mouth after radiotherapy. Each symptom was scored from 0 to 6 points. The lower the score was, the better the efficacy was. As shown in Table 2, although the scores of symptoms were all decreased after normal saline and inhalation of dexamethasone, gentamicin, and vitamin B₁₂ with or without additional treatment of Yunnan Baiyao plus Kangfuxin solution (), this decrease was greater for patients with additional treatment of Yunnan Baiyao plus Kangfuxin solution. The study group exhibited few points than the control group after treatment (). These data suggested that additional treatment of Yunnan Baiyao plus Kangfuxin solution relieved the symptoms of irradiation-induced oral mucositis in NPC patients after radiotherapy.

3.2. Yunnan Baiyao plus Kangfuxin Solution Attenuated the Disease Severity of Irradiation-Induced Oral Mucositis

Subsequently, the classification of radiation-induced oral mucositis was evaluated in the control and observation groups after normal saline and inhalation of dexamethasone, gentamicin, and vitamin B₁₂ with or without additional treatment of Yunnan Baiyao plus Kangfuxin solution. The control group had 1 case with no evidence of oral mucositis, 14 cases of grade 1, 21 cases of grade 2, 7 cases of grade 3, and 2 cases of grade 4. The study group had 4 cases with no evidence of oral mucositis, 18 cases of grade 1, 21 cases of grade 2, 2 cases of grade 3, and 0 case of grade 4. It was revealed that the control group and the study group were significantly different with regard to occurrence of radiation-induced oral mucositis according to classifications (, Table 3).

3.3. Yunnan Baiyao plus Kangfuxin Solution Reduced Inflammatory Response in Irradiation-Induced Oral Mucositis

Early inflammation is a major factor of mucosal reactions to radiotherapy. Radiation-induced oral mucositis is associated with continuing presence of systemic inflammation. Given that, the release of inflammatory factors was examined by ELISA detection of serum CRP, TNF-α, IL-1, and MMP-9 before and after normal saline and inhalation of dexamethasone, gentamicin, and vitamin B₁₂ with or without additional treatment of Yunnan Baiyao plus Kangfuxin solution. Although the serum levels of CRP, TNF-α, IL-1, and MMP-9 were all remarkably declined after normal saline and inhalation of dexamethasone, gentamicin, and vitamin B₁₂ with or without additional treatment of Yunnan Baiyao plus Kangfuxin solution (), the study group exhibited declined serum levels of CRP, TNF-α, IL-1, and MMP-9 than the control group after treatment (, Figure 2). These results indicated that additional treatment of Yunnan Baiyao plus Kangfuxin solution reduced inflammatory response in NPC patients with irradiation-induced oral mucositis.

3.4. Yunnan Baiyao plus Kangfuxin Solution Reduced HIF-1α and VEGF Expressions in Irradiation-Induced Oral Mucositis

HIF-1α is a transcription factor induced by hypoxia or inflammation and plays a pivotal role in physiological and pathological processes. Results of ELISA showed that the serum level of HIF-1α in the two groups were significantly lower after treatment than those before treatment (), and the change was more significant in the study group than those in the control group (P <0.05, Figure 3). VEGF is a potent angiogenic cytokine implicated in tumour vasculogenesis. Previous evidence showed that VEGF was upregulated after ulceration. Our ELISA results revealed that the serum level of VEGF in the two groups were significantly lower after treatment than those before treatment (). The study group had a declined VEGF level when comparable to the control group (, Figure 3).

3.5. Yunnan Baiyao plus Kangfuxin Solution Sustained T Lymphocytes

Increasing evidence points that oral mucositis may be related with autoimmune dysregulation that is characterized by reduced T cells. The numbers of CD⁺³, CD⁺⁴ T cells and the ratio of CD⁺⁴/CD⁺⁸ were increased significantly, and the numbers of CD⁺⁸ were declined significantly after treatment than those before treatment (); these changes were more obvious in the study group compared with the control group (, Table 4).

4. Discussion

The management of oral mucositis mainly depends on local medication. Bacterial infection is often secondary to oral mucositis, which further reduces the tolerance of local normal tissues to radiation. Therefore, gentamicin is generally used in clinical antibacterial treatment for oral mucositis [15]. Dexamethasone can reduce the response of tissue to inflammatory factors and help to control inflammation in oral mucositis [16]. Vitamin B₁₂ can promote the regeneration of epithelial cells, maintain the function of epithelial cells, and accelerate the healing of oral ulcer [17]. The patients in the control group were given an inhalation (15 min once, twice for one day) of 16 F.U gentamicin, 5 mg dexamethasone, and 2 mg vitamin B₁₂.

Yunnan Baiyao is a traditional Chinese herbal medicine that has been used to treat wounds for over 100 years. It is called “holy medicine” for traumatology. It is good at promoting blood circulation to stop bleeding, dispersing blood stasis, and detumescence. It has the pharmacological effects of hemostasis, bacteriostasis, and removing blood stasis. It can promote the synthesis of collagen, promote the growth of epidermal cells, and improve the local microcirculation, which is conducive to the rapid repair of damaged mucosa [18].

Kangfuxin liquid is a drug extracted from the dried body of Fusarium falcatum, with effective components polyols and peptides [19]. It can promote fibroblasts to synthesize a large amount of collagen, which is conducive to the growth of epidermal cells in injured tissues, accelerate the proliferation of granulation tissue, induce the proliferation of mucosal capillary vessels, improve local blood supply, and facilitate the rapid repair of wounds [20, 21]. Kangfuxin liquid contains mucosamine that can enhance the immune function and promote wound healing [22]. In this study, Yunnan Baiyao combined with Kangfuxin liquid was used in the prevention and treatment of oral mucositis after radiotherapy, and satisfactory results were achieved. The degree of oral mucositis of patients was milder, and the incidence of severe injury above grade 3 was significantly lower than that of patients who were treated with local application of normal saline combined with dexamethasone, gentamicin, and vitamin B₁₂ by aerosol inhalation. In addition, the safety of Yunnan Baiyao and Kangfuxin Liquid was good, and there was no special discomfort during the treatment.

The inflammation was induced in oral mucositis of patients. The level of CRP was increased in cancer patients after radiotherapy [23]. TNF-α is a cytokine secreted by the monocyte macrophage system, which has a variety of biological activities and participates in the occurrence and development of inflammatory diseases such as infection, trauma, autoimmune diseases, and malignant tumors [24]. IL-1, a member of the interleukin family, is produced by activated monocyte macrophages. It can stimulate T lymphocyte activation, synthesize CRP, and cause fever and cachexia [25]. TGF-β1 is a member of the transforming growth factor family, which can transform the phenotype of normal fibroblasts [26]. MMP-9 is a member of matrix metalloproteinase family, which can degrade or remodel extracellular matrix and release TGF-β1 [27]. In this study, we found that the levels of CRP, TNF-α, IL-1, TGF-β1, and MMP-9 in NPC patients with radiotherapy were significantly higher than those before radiotherapy. The results suggest that radiation injury can stimulate the body to produce inflammatory response, activate monocyte macrophages, and increase the levels of inflammatory factors. However, the levels of CRP, TNF-α, IL-1, TGF-β1, and MMP-9 in patients with adjuvant therapy of Yunnan Baiyao and Kangfuxin liquid were significantly reduced, suggesting that Yunnan Baiyao and Kangfuxin liquid can alleviate radiation-induced oral mucositis, which may be related to the fact that the glucosamine components in Kangfuxin liquid can regulate the synthesis of inflammatory substances such as interleukin, interferon, and leukotriene.

In summary, Yunnan Baiyao combined with Kangfuxin liquid effectively prevents radiotherapy-induced oral mucositis and reduces the release of inflammatory factors, compared with normal saline combined with dexamethasone, gentamicin, and vitamin B₁₂. Yunnan Baiyao combined with Kangfuxin liquid improves the quality of life in patients, and this approach is effective, user-friendly, safe, and appropriate for clinical application. Nevertheless, large-scale populations should be recruited to strengthen the validation of our results.

Data Availability

The data used to support the findings of this study are included within the article.

Conflicts of Interest

All authors declare that they have no conflict of interest.

Authors’ Contributions

Xiuyu Tang and Jiahui Sun contributed equally to this work and regarded as co-first authors.

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Copyright © 2021 Xiuyu Tang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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