Introduction: External radiotherapy is one of the main treatment modalities for a variety of malignancies. However, the lower gastrointestinal tract is sensitive to the ionizing radiation. Hyperbaric oxygen treatment (HOT) has been suggested as a viable treatment for refractory radiation colitis, but the effect of S-Methylisothiourea (SMT) in the radiation colitis have not reported. To investigate the effect of SMT, HOT and the combination of both in an acute radiation-induced enterocolitis model.
Methods: Sixty Sprague-Dawley rats were divided randomly into five equal groups. A single dose of gamma irradiation (25 Gy) was administered through the colorectal region to anesthetized rats. In the control group, we applied 2 ml of saline solution intraperitoneally for five days. In the HOT group, 100-per-cent oxygen at 2.5 atm pressure was applied for five days. In the SMT group, 10 mg/kg/day of SMT was applied intraperitoneally for five days. In the HOT+SMT group, HOT and SMT were both applied in the same dosages as in the preceding two groups. At the end of five days, the rats were sacrificed and colon samples were collected for histological grading. Blood samples were collected to test for : tumor necrosis factor-α (TNF-α), interleukin-10 (IL-10), IL-1β, transforming growth factor-β (TGF-β) and intercellular adhesion molecule-1 (ICAM-1) mRNA.
Results: The TNF-α, IL-1β, IL-10 and TGF-β levels were reduced by SMT, HOT and HOT+SMT applications (p < 0.05). However ICAM-1 mRNA levels were not significantly lower (p:0.19). The microscopic scores differed significantly between the SMT, HOT and HOT+SMT groups and the control group. There was significant improvement histologically, especially in the HOT+SMT group. When we compared the weight of the rats before and after the study, weight loss was significantly lower in the SMT, HOT and HOT+SMT groups compared with the control group (p < 0.05).
Conclusion: HOT and SMT together were significantly more effective in preventing weight loss and in reducing inflammation and the severity of colitis histology when compared with HOT and SMT separately.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Radiation exposure in patients with inflammatory bowel disease.
J Crohns Colitis
January 2025
Translational Research in Gastrointestinal Disorders (TARGID), Department of Chronic Diseases and Metabolism, KU Leuven, Leuven, Belgium and Department of Gastroenterology and Hepatology, University Hospitals Leuven, Belgium.
Background And Aims: Radiological imaging is crucial for diagnosing and monitoring patients with inflammatory bowel diseases (IBD). With increasing awareness of radiation risks, imaging doses should be 'as low as reasonably achievable', with a risk level that one should try to stay underneath 75 mSv. However, real-world data on cumulative exposure are limited.
View Article and Find Full Text PDFEffect of obesity on postoperative complications in ulcerative colitis: A systematic review and meta-analysis.
Ann Gastroenterol Surg
January 2025
Department of Surgery, Transplantation and Gastroenterology Semmelweis University Budapest Hungary.
Article Synopsis
- The study investigates the impact of obesity on postoperative complications in ulcerative colitis patients undergoing a specific surgery (IPAA).
- Results showed no significant difference in overall complication rates between obese and non-obese patients, though obese patients had slightly longer hospital stays.
- The findings highlight low certainty of evidence, suggesting further research is needed to draw definitive conclusions.
Adverse drug events associated with capecitabine: a real-world pharmacovigilance study based on the FAERS database.
Ther Adv Drug Saf
December 2024
Department of Hepatobiliary Surgery, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China.
Background: Capecitabine, a prodrug of 5-fluorouracil, is extensively utilized for the treatment of metastatic breast cancer, colorectal cancer, and gastric cancer. Nevertheless, there exist limitations in comprehending adverse reactions (AEs) in clinical practice. In this study, we investigated the distribution of AEs associated with capecitabine and explored potential rare adverse reactions by mining the Food and Drug Administration Adverse Event Reporting System (FAERS).
View Article and Find Full Text PDFNEDD4L mediates intestinal epithelial cell ferroptosis to restrict inflammatory bowel diseases and colorectal tumorigenesis.
J Clin Invest
December 2024
The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China.
Various factors play key roles in maintaining intestine homeostasis. Disruption of the balance may lead to intestinal inflammatory diseases (IBDs) and even colorectal cancer (CRC). Loss or gain of function of many key proteins can result in dysregulated intestinal homeostasis.
View Article and Find Full Text PDFDelayed immune-related adverse events profile associated with immune checkpoint inhibitors: a real-world analysis.
Front Pharmacol
November 2024
Radiation Oncology Center, Chongqing University Cancer Hospital, Chongqing, China.
Background: Immune-related adverse events (irAEs) typically occur within 3 months of initiating immune-checkpoint inhibitors (ICIs), which has been extensively documented. But the clinical profiles of late-onset irAEs remain inadequately characterized. Therefore, this study aims to quantify the correlation between delayed irAEs and ICIs, and to delineate the profiles of delayed toxicities associated with ICIs using data from the Food and Drug Administration Adverse Event Reporting System (FAERS).
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!