Evaluation of fish oils in amelioration of diabetes-induced tissue dam-ages in mice (Mus musculus)

Abstract

Prolonged diabetes leads to multi-organ damages due to oxidative stress. Fish oil rich in omega-3 poly unsaturated fatty acid is known to reduce the oxidative stress. The present study has been aimed to evaluate the ameliorative effect of two fish oils extracted from Sardinella longiceps and Rastrelliger kanagurta, in diabetes-induced tissue damages in liver, kidney and heart tissues of mice, Mus musculus. Diabetes was induced by repetitive intra-peritoneal injection of alloxan (100mg/kg BW). The diabetic mice were fed the commercial pellet diet supplemented with 10% laboratory extracted fish oil of S.longiceps and R.kanagurta, for period of one month. Concentra-tion of various parameters viz.,Thiobutaric acid reactive substance, Vitamin C, Vitamin E and reduced glutathione along with activities of Aspartate aminotransferase, Alanine aminotransferase, Gamma glutamyltranspeptidase, Lactate dehydrogenase, Superoxide dismutase and Catalase were monitored in these tissues. Altered level of tissue biochemical composition and enzyme activities due to diabetes-induced damages was nearly brought down to nor-mal levels with the supplementation of 10% fish oil. Histological studies of liver, heart and kidney confirms the protective effect of dietary fish oil from diabetes induced tissue damages. Fish oil from S.longiceps brought maximum changes in concentration of TBARS, Vitamin C and in the activities of AST, LDH and Catalase in diabetic mice in comparison with the fish oil of R.kanagurta. Fish oil from S.longiceps offers better protective effect in diabe-tes induced mice in comparison to R. kanagurta oil.