Abstract
This study assessed the in vitro anti-diabetic potential and bioactive constituents of ten Sri Lankan medicinal herbs. Initial screening of aqueous extracts for starch-digesting enzyme inhibition prioritised three plants with notable activity (p ≤ 0.05), for further assessment using methanolic extracts: Phyllanthus emblica (PE), Cassia auriculata (CA), and Hemidesmus indicus (HI). The selected plants were tested for starch-digesting enzyme inhibition, cytotoxicity, and bioactive metabolite identification, with PE subjected to GC-MS and LC-HRMS analyses. All three extracts contained alkaloids, flavonoids, tannins, and terpenoids, except saponins and steroids in PE. GC-MS analysis of PE annotated ten compounds, eight with anti-diabetic properties, while LC-HRMS annotated thirty metabolites, including fourteen anti-diabetic compounds. Cell viability assessments confirmed the non-toxic nature of PE, CA, and HI. The significant enzyme inhibition and non-toxic nature of PE highlight its potential to treat type 2 diabetes. Further in vivo and clinical studies are essential to determining effective dosage and toxicity levels.
Published Version
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