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Background: Diabetes mellitus is believed to be the most serious metabolic disease. One of the treatments for diabetes is to delay glucose uptake by inhibiting carbohydrate-hydrolyzing enzymes. Alpha-glucosidase inhibitors delay glucose uptake. Objectives: The present study was conducted aiming to evaluate the efficacy of Salvia extracts in inhibiting diabetes marker enzymes and their effects on the treatment of diabetes. Methods: This experimental study was performed in vitro. The studied plants included Salvia macilenta and Salvia officinalis. The inhibitory effects of their dichloromethane and methanol extracts were also investigated. After calculating the percentage of inhibition and IC50, Km and Vmax using GraphPad Prism 7 were also calculated. The statistical analysis was performed employing GraphPad Instat 3 software. Results: The results herein showed that the greatest inhibitory effect on alpha-glucosidase belonged to the methanol extract of S. macilenta with IC50 = 8.73 ± 0.26 mg/mL compared to that of acarbose with IC50 = 8.82 ± 0.14 mg/mL as a standard. The IC50 of dichloromethane extract of S. officinalis was 8.95 ± 0.23 mg/mL. Conclusions: The extracts had significant inhibitory effects on alpha-glucosidase. However, methanol extract of S. macilenta and dichloromethane extract of S. officinalis demonstrated the greatest inhibitory effects on alpha-glucosidase compared to acarbose as a standard.

jundishapur journal of natural pharmaceutical products

Evaluating the Inhibitory Effects of Dichloromethane and Methanol Extracts of Salvia macilenta and Salvia officinalis on the Diabetes Marker Enzyme, Alpha-Glucosidase: An Approach for the Treatment of Diabetes