Rutin improves the antioxidant status in streptozotocin-induced diabetic rat tissues



Rutin, a polyphenolic flavonoid, was investigated for its antioxidant potential in streptozotocin (STZ)-induced diabetic rats. Rats were rendered diabetic by a single intraperitoneal injection of streptozotocin (50 mg/kg). The levels of fasting plasma glucose and insulin were estimated. Lipid peroxidative products and antioxidants were estimated in liver, kidney and brain. Histopathological studies were carried out in these tissues. A significant (p < 0.05) increase in the levels of fasting plasma glucose, lipid peroxidative products (thiobarbituric acid reactive substances [TBARS] and lipid hydroperoxides [HP]) and a significant (p < 0.05) decrease in plasma insulin, enzymic antioxidants (superoxide dismutase [SOD], catalase, glutathione peroxidase [GPx] and glutathione reductase [GRx]) and nonenzymic antioxidants (reduced glutathione [GSH], vitamin C and E) in diabetic liver, kidney and brain were observed. Oral administration of rutin (100 mg/kg) for a period of 45 days significantly (p < 0.05) decreased fasting plasma glucose, increased insulin levels and improved the antioxidant status of diabetic rats by decreasing lipid peroxidative products and increasing enzymic and nonenzymic antioxidants. Normal rats treated with rutin (100 mg/kg) showed no significant (p < 0.05) effect on any of the parameters studied. Histopathological studies of the liver, kidney and brain showed the protective role of rutin. Thus, our study clearly shows that rutin has antioxidant effect in STZ-induced experimental diabetes.

Key words

rutin diabetes mellitus streptozotocin lipid peroxidation antioxidants 


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Copyright information

© Springer Science+Business Media, Inc. 2006

Authors and Affiliations

  1. 1.Department of Biochemistry and BiotechnologyAnnamalai UniversityAnnamalainagarIndia

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