5-Aminosalicylic Acid (5-ASA) Can Reduce Levels of Oxidative DNA Damage in Cells of Colonic Mucosa With and Without Fecal Stream
- نوع فایل : کتاب
- زبان : انگلیسی
- مؤلف : Caroline Caltabiano Felipe Rodrigues Ma´ximo Ana Paula Pimentel Spadari Daniel Duarte da Conceic¸aکo Miranda Marcia Milena Pivatto Serra Mar
- چاپ و سال / کشور: 2010
Description
Background No studies have evaluated the effectiveness of 5-ASA against oxidative DNA damage in experimental models of diversion colitis. Aim To evaluate the effects of 5-ASA against oxidative DNA damage in an experimental model of diversion colitis. Methods Twenty-six Wistar rats were divided into two groups corresponding to sacrifice at 2 or 4 weeks after fecal diversion of the left colon by means of proximal colostomy and distal mucosa fistula. Each group was divided into two subgroups according to intervention in excluded colon performed with 0.9% saline solution or 5-ASA. Level of oxidative DNA damage was determined by comet assay in cells obtained from segments with and without fecal stream before and after H2O2 challenge. For statistical analysis, was used one-way analysis of variance (ANOVA), adopting a 5% significance level (P\0.05). Results Levels of DNA damage were always higher in colon segments without fecal stream, regardless of the intervention solution employed. DNA damage in colon segments with and without fecal stream in animals irrigated with 5-ASA was lower when compared with those treated with saline solution, regardless of time of irrigation. These levels remained lower after intervention with 5-ASA, even after H2O2 challenge. Conclusions Enema with 5-ASA reduces oxidative DNA damage in epithelial cells of colon segments without fecalstream, even after H2O2 challenge, confirming the effects of 5-ASA against DNA damage by oxygen free radicals
Dig Dis Sci (2011) 56:1037–1046 DOI 10.1007/s10620-010-1378-z Received: 22 March 2010 / Accepted: 29 July 2010 / Published online: 2 November 2010
