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Diabetes is a metabolic disorder of several etiologies, many oral anti-hyperglycemic agents such as sulfonylurea, biguanides are obtainable, but these agents have side effects, thus there is need of a new natural anti-hyperglycemic agent. Methods: The present study was performed to evaluate the protective role of selenium nanoparticles-grape seed extract (SeNPs-GSE) mixture in ameliorating the changes in the oxidative stress biomarkers induced by gamma radiation in diabetic rats. Experimental model of diabetic irradiated rats was induced by single intrapertoneal injection of streptozotocin (STZ 45 mg/kg) followed by γ-radiation exposure (4 Gy). Forty eight rats were randomly classified into 6 experimental groups: normal, diabetic, irradiated, diabetic irradiated, diabetic treated with either SeNPs-GSE mixtureor glimepiride(1 mg) for (14) days followed by γ-radiation. Results: Results of the present study indicated that rats exposed to γ-radiation and, or STZ significantly increase serum glucose& liver MDA levels. This increase was accompanied by a decrease in the levels of serum insulin, total antioxidant (TAC), liver enzyme activities of catalase (CAT), glutathione peroxidase (GPx), superoxide dismutase (SOD), as well as liver tissue contents of vitamin C (Vit.C) and vitamin E (Vit.E). Diabetic rats treated with (SeNPs–GSE) mixture or glimepiride before γ-radiation exert a significant improvement in all tested biochemical parameters. Conclusion: The present study showed that a mixture of (SeNPs -GSE) possesses antioxidant and anti-diabetic activities by decreasing oxidative stress biomarkers as well as blood glucose level tested in this study. The tested combination (SeNPs–GSE) mixture is more or less equally active as that of the standard tested anti-diabetic drug glimepiride

Modulatory Role of Selenium Nanoparticles and Grape Seed Extract Mixture on Oxidative Stress Biomarkers in Diabetic Irradiated Rats.