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  • Title: Protective effect of Withania somnifera against oxidative stress and pancreatic beta-cell damage in type 2 diabetic rats.
    Author: Anwer T, Sharma M, Pillai KK, Khan G.
    Journal: Acta Pol Pharm; 2012; 69(6):1095-101. PubMed ID: 23285670.
    Abstract:
    The aim of the present study was to investigate the effects of Withania somnifera (WS) on lipid peroxidation (LPO), activities of both non-enzymatic and enzymatic antioxidants and histopathological examination of pancreas in type 2 diabetic rats. Type 2 diabetes was induced by single intraperitoneal injection of STZ (100 mg/kg) to 2 days old rat pups. Oxidative stress was measured by tissue LPO levels, reduced glutathione (GSH) contents and by enzymatic activities of glutathione peroxidase (GPx), glutathione reductase (GR), glutathione-S-transferase (GST), superoxide dismutase (SOD) and catalase (CAT). Administration of WS to type 2 diabetic rats caused a significant decrease in blood glucose and tissue LPO levels with significant increase in GSH contents when compared with the type 2 diabetic control rats. In addition, WS treated rats also showed a significant increase in the activities of antioxidant enzymes namely GPx, GR, GST, SOD and CAT when compared with type 2 diabetic control rats. Significant reduction in the number and size of pancreatic beta-cells were preserved to near normal morphology by the administration of WS in type 2 diabetic rats as evident from histopathological examination. The results obtained clearly indicate that WS has shown strong free radical scavenging activity and helped in improving the non-enzymatic and enzymatic antioxidants in type 2 diabetic rats.
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