Evaluation of Hypoglycemic Activity of Boswellia carterii and Cissus rotundifolia in Streptozotocin/Nicotinamide-Induced Diabetic Rats

Objective: To evaluate the hypoglycemic activity of Boswellia carterii and Cissus rotundifolia in rats compared to that of glibenclamide and metformin as common oral hypoglycemic drugs.Methods: Thirty-six male Wistar rats, divided into six groups of six rats each, were assigned into diabetic and non-diabetic groups. Diabetes was induced in rats by single intraperitoneal administration of streptozotocin (65 mg/kg b.w.) and nicotinamide (110 mg/kg b.w.). The first two groups were normal and diabetic controls, whereas the other four diabetic groups were treated with water extracts of the medicinal plants; B. carterii (100 mg/kg b.w.) and C. rotundifolia (100 mg/kg b.w.), glibenclamide (5 mg/kg b.w.) and metformin (150 mg/kg b.w.). Body weight and serum glucose were measured on days 1, 7, 14, 21 and 28. Serum cholesterol and triglyceride levels were also measured.Results: Treatment of diabetic rats with the water extracts of B. carterii and C. rotundifolia for four weeks resulted in a significant (p<0.05) increase in their body weights and a significant decrease in the levels of serum glucose, cholesterol and triglycerides. The effects of the two plant extracts were almost similar to those of glibenclamide and metformin.Conclusion: Water extracts of B. carterii or C. rotundifolia have a hypoglycemic effect resembling those of glibenclamide and metformin, and these findings provide a pharmacological evidence for their anti-diabetic claims in folk medicine