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Cytoprotective effects of amifostine and melatonin against radiation-induced oral mucositis in rats
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D. Park   , D.H. Kim , W.T. Kim , J.H. Nam , D.C. Kim , K.H. Lee , Y.K. Ki , J.H. Joo , H.S. Jeon |
| Department of Radiation Oncology, Biomedical Research Institute, Pusan National University Hospital and Pusan National University School of Medicine, Busan, Republic of Korea , dh2372@pusan.ac.kr |
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Abstract: (745 Views) |
Background: Amifostine (AMI) protects against radiotherapy (RT)-induced toxicities and melatonin (MEL) is a potent free radical scavenger. This study was performed to investigate the protective effects of AMI and MEL on radiation-induced oral mucositis (ROM). Materials and Methods: Thirty female Sprague-Dawley rats were randomly divided into five groups as follows: the control (Cont), RT alone (RT), RT+AMI, RT+MEL, and RT+AMI+MEL. RT groups were irradiated with a single dose of 15 Gy to the head. AMI (200 mg/kg) and MEL (100 mg/kg) were administered intraperitoneally 1 hour before radiation exposure. Changes in body weights and histology in irradiated tongue tissues were analyzed 10 days after exposure. Results: AMI and/or MEL treatment significantly prevented irradiation-induced body weight loss and promoted epithelial cell proliferation. Mean epithelial thickness was markedly higher in the AMI+MEL group (73.9 ± 9.7 um) than in the RT group (28.8 ± 13.9 um) (P<0.001), and Ki67 expression was significantly higher in AMI, MEL, and AMI+MEL groups than in the RT group (p < 0.001). Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) revealed that AMI+MEL treatment significantly inhibited radiation-induced apoptosis in irradiated epithelium (p=0.006). Conclusion: AMI and MEL administrations similarly protected animals from ROM and, when co-administered, had additive effects. |
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| Keywords: Amifostine, melatonin, radiation-induced oral mucositis, rats. |
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Full-Text [PDF 632 kb]
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Type of Study: Original Research |
Subject:
Radiation Biology
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Park D, Kim D, Kim W, Nam J, Kim D, Lee K, et al . Cytoprotective effects of amifostine and melatonin against radiation-induced oral mucositis in rats. Int J Radiat Res 2023; 21 (2) :261-265 URL: http://ijrr.com/article-1-4721-en.html
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