Add time:07/19/2019         Source:sciencedirect.com

Diabetes mellitus is the most common endocrine disorder characterized by hyperglycemia resulting from defects in insulin secretion or insulin action. The present study was designed to investigate the antidiabetic effects of vincamine, one of the monoterpenoid indole alkaloid, in streptozotocin-induced diabetic rat model. Diabetes was induced in rats by an intraperitoneal injection of streptozotocin (40 mg/kg bw). Vincamine 20 and 30 mg/kg.bw were administrated orally as a single dose per day to the diabetic rats for 30 days. The vehicle control group received 0.5% dimethyl sulfoxide for the same duration. After 30 days of treatment, fasting blood glucose, glycosylated haemoglobin, total cholesterol, triglyceride, low-density lipoprotein cholesterol and very low-density lipoprotein cholesterol levels were significantly increased, whereas, body weight, plasma insulin, high-density lipoprotein cholesterol, antioxidant enzymes and reduced glutathione were markedly decreased in diabetic rats. Treatment with vincamine significantly restored these parameters to the normal level. The protective effect of vincamine was compared with glibenclamide, a well-known hypoglycemic drug. Our results clearly suggest that vincamine exhibit hypoglycemic, hypolipidemic and antioxidant activity. The anti-diabetic effect of vincamine was comparable to the protective effect of glibenclamide, suggesting its potential as a natural anti-diabetic compound with therapeutic benefits.

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