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Evidence-Based Complementary and Alternative Medicine
Volume 2016, Article ID 7687915, 5 pages
Research Article

Inhibition of α-Glucosidase by Thiosulfinate as a Target for Glucose Modulation in Diabetic Rats

Department of Biochemistry, Faculty of Science, Bioactive Natural Products Research Group and Experimental Biochemistry Unit, King Fahd Medical Research Center, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia

Received 14 November 2015; Accepted 24 February 2016

Academic Editor: Pratibha V. Nerurkar

Copyright © 2016 Abdulrahman L. Al-Malki. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Postprandial hyperglycemia is a predisposing factor for vascular dysfunction and organ damage. α-glucosidase is a hydrolytic enzyme that increases the glucose absorption rate and subsequently elevates blood glucose levels. Garlic (Allium sativum L.) is a rich source of several phytonutrients, including thiosulfinate (THIO). The aim of this study was to evaluate the ability of THIO, a potent inhibitor of intestinal α-glucosidase, to reduce postprandial blood glucose. Male albino rats were randomly assigned to five different groups (/group). Group 1 served as the control group. Groups 2–5 were injected intraperitoneally with a single dose of streptozotocin (STZ) to induce diabetes. Group 2 comprised untreated diabetic rats. Groups 3 and 4 contained diabetic rats that were given THIO orally (20 mg/kg body weight/day and 40 mg/kg body weight/day, resp.). Group 5 was the positive control having diabetic rats treated orally with acarbose (10 mg/kg body weight/day; positive control). Diabetic rats treated with THIO displayed a significant blood glucose reduction ( and < 0.01 by analysis of variance, resp.) and a significant elevation in insulin compared with that of untreated rats. THIO is an effective noncompetitive intestinal α-glucosidase inhibitor that promotes hypoglycemic action () in STZ-injected rats. THIO is a promising agent for the management of postprandial hyperglycemia.