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2000
Volume 11, Issue 2
  • ISSN: 2215-0838
  • E-ISSN: 2215-0846

Abstract

Background

Postprandial hyperglycemia is a key factor in type 2 diabetes, and its management is critical in alleviating the deleterious consequences of diabetes and its associated micro and macrovascular complications.

Objective

The current study aims to determine the effect of leaf extracts on α-glucosidase inhibition and postprandial hyperglycemia in rats.

Methods

Sequentially extracted leaf extracts of were evaluated for their inhibitory effects on α-glucosidase and the suppression of postprandial hyperglycemia in normoglycemic rats. The extracts were fingerprinted using a Fourier-transform infrared (FTIR) spectroscopy (FTIR), and the bioactive compounds were evaluated by molecular docking for their interaction with α-glucosidase.

Results

FTIR fingerprinting of the extracts showed that they contain functional groups of important bioactive phytochemicals. The extracts inhibited α-glucosidase , with the methanol extract (1 mg/mL) showing the highest inhibitory effect of 93.52 ± 1.50% compared to 69.62% ± 1.45 of the standard drug acarbose (0.05 mg/mL). The extracts also reduced postprandial hyperglycemia in rats in a sucrose tolerance test, where the hexane and methanol extracts performed similarly to Acarbose. Molecular docking studies showed that 20 (29)-lupene-3β-isoferulate is the most potent α-glucosidase inhibitor with the lowest binding energy of -10.79 kcal/mol, 2 hydrogen bonds with residues ASP1526 and ASP1157, and numerous van der Waals interactions with amino acids in the binding pocket of α-glucosidase.

Conclusion

leaf extracts were found to suppress postprandial hyperglycemia by inhibiting α-glucosidase activity; thus, it has a promising potential for use as an antidiabetic agent.

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