Aim: Ulcerative colitis and Crohn's disease are chronic recurrent inflammatory bowel disease (IBD) of unknown origin. Oxidative stress is believed to be a key factor in the pathogenesis and perpetuation of the mucosal damage in IBD.
Materials and methods: Ethanolic extract of Fragaria vesca (EFFV) fruits was prepared by percolation method and subjected to oral toxicity testing using OECD guidelines. Albino rats were pretreated orally for 5 days with 3% gum acacia in control, EFFV 500 mg/kg in test and 5-aminosalisylic acid (5-ASA) 100 mg/kg in standard groups. Colitis was induced by transrectal administration of 4% acetic acid on 5(th) day. All the animals were sacrificed with ether overdose 48 hours after colitis induction, and 10 cm colon segment was resected from proximal end. Colon was weighed (for disease activity index) and scored macroscopically and microscopically after histological staining. Biochemical assessments included myeloperoxidase (MPO) and tissue catalase (CAT), glutathione (GSH) and superoxide dismutase (SOD) measurements. Statistical analysis was done using one-way analysis of variance (ANOVA) followed by Dunnett's "t" test.
Results: EFFV showed significant (P < 0.05) prevention of increase in colon weight and disease activity index along with decrease in macroscopic and microscopic lesion score as compared to control group. Significant improvement was observed in the levels of MPO, CAT and SOD, except GSH (P < 0.05). However, the effect of EFFV was significantly less than 5-ASA (P < 0.05).
Conclusions: EFFV at 500 mg/kg showed significant amelioration of experimentally induced IBD, which may be attributed to its antioxidant and anti-inflammatory properties.
Keywords: Colitis; Fragaria vesca; antioxidant; transrectal.