Asian Pacific Journal of Tropical Biomedicine
In vitro hypoglycemic effects of Albizzia lebbeck and Mucuna pruriens
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Abstract:
Objective: To verify the antidiabetic potential of stem bark of Albizzia lebbeck (A. lebbeck) and seeds of Mucuna pruriens (M. pruriens) using various in vitro techniques. Methods: The plant extracts were studied for their effects on glucose adsorption, diffusion amylolysis kinetics and glucose transport across yeast cells. Results: Both the plant extracts adsorbed glucose and the adsorption of glucose increased remarkably with an increase in glucose concentration. No significant (P≤0.05) differences were observed between the adsorption capacities of A. lebbeck and M. pruriens. In amylolysis kinetic experimental model the rate of glucose diffusion was found to increase with time from 30 to 180 min, and both the plant extracts demonstrated significant inhibitory effects on movement of glucose into external solution across dialysis membrane as compared to control. The retardation of glucose diffusion by A. lebbeck extract was significantly higher (P≤0.05) than M. pruriens. These effects were reflected with higher glucose dialysis retardation index values for A. lebbeck than M. pruriens. The plant extracts also promoted glucose uptake by yeast cells. The rate of uptake of glucose into yeast cells was linear in all the 5 glucose concentrations used in the study. M. pruriens extract exhibited significantly higher (P≤0.05) activity than the extract of A. lebbeck at all concentrations. Conclusions: The results verified the antidiabetic potential of A. lebbeck and M. pruriens. The hypoglycemic effect exhibited by the extracts is mediated by increasing glucose adsorption, decreasing glucose diffusion rate and at the cellular level by promoting glucose transport across the cell membrane as revealed by simple in vitro model of yeast cells.
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