Abstract
Objectives:Punica granatum L., (Family: Punicaceae) is used in Indian Unani medicine for treatment of diabetes mellitus. Therefore, the present study was done to evaluate the antidiabetic and antihyperlipidemic effects of ethanolic extract of leaves of P. granatum in alloxan-induced diabetic rats.Materials and Methods:Healthy Wistar albino rats (100-150 g) were divided into four groups of six animals each. Groups A and B received normal saline [(10 ml/kg/day/per oral (p.o.)]; group C received ethanolic extract of leaves of P. granatum (500 mg/kg/p.o.); and group D received glibenclamide (0.5 mg/kg/day/p.o.). The extracts were given for 1 week in all groups. To induce diabetes, alloxan 150 mg/kg, intraperitoneal (i.p.) single dose was administered to groups B, C, and D. Blood glucose and serum lipids [Total Cholesterol (TC), Triglycerides (TG), Low Density Lipoproteins (LDL), and High Density Lipoproteins (HDL)] and the atherogenic index were estimated after one week. For mechanism of antidiabetic action glycogen estimation on the liver, cardiac and skeletal muscle, and intestinal glucose absorption was done.Results:Group B showed a significant (P<0.01) increase in blood glucose as compared to group A. Groups C and D showed significant decrease (P<0.01) in blood glucose level in comparison to group B. The test drug showed a significant (P<0.01) increase in glycogen content in the liver, cardiac, and skeletal muscle; it significantly (P<0.01) reduced intestinal glucose absorption. Groups C and D showed significant (P<0.01) decrease in serum TC, TG, LDL, and AI as compared to Group B, which showed a significant (P<0.01) increase. Groups C and D showed significant (P<0.01) increase in serum HDL as compared to Group B, which showed a significant (P<0.01) decrease in all values.Conclusion:P. granatum leaves possess significant antidiabetic and antihyperlipidemic activity.
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