Gas Chromatography-Mass Spectrometry Analysis and α-Glucosidase Inhibitory Activity of n-Hexane Extract of Bilajang Bulu (Merremia Vitifolia) Leaves

Candra Yulius Tahya*  -  Universitas Pelita Harapan, Indonesia
Karnelasatri Karnelasatri  -  Universitas Pelita Harapan, Indonesia

(*) Corresponding Author
One of the most effective treatments for diabetes mellitus is to inhibit α-glucosidase, which inhibits glucose absorption by the epithelium membrane of the small intestine. In South Sulawesi, Indonesia, Merremia vitifolia is used as a traditional medicine for the treatment of diabetes.  The aims of this study are to (1) assess the extract's ability to inhibit α - glucosidase and (2) identify volatile organic compounds in n-hexane of Merremia vitifolia extract. Extraction was conducted by maceration.  The inhibitory activity of quercetin towards α-glucosidase has the IC50 = 2.53 ± 0.16 µg/mL, and by n-Hexane extract of Merremia vitifolia leaves has the IC50 = 14.4 ± 1.52 µg/mL.  Then, n-Hexane extract of Merremia vitifolia leaves has strong α-glucosidase inhibitory activity. The compounds that have been identified based on Gas Chromatography-Mass Spectrometry (GC-MS) analysis with similarity index ≥ 89% which are caryophyllene (0.94%), (E)-β-famesene (4.72%), neophytadiene (9.78%), phytol (65.94%), 9,12,15-octadecatrienoic acid (6.71%), 1,5-cyclodecadiene (6.76%), squalene (4.48%), stigmasterol (4.08%), γ-sitosterol (10.20%), Serratol (23.12%), vitamin E (2.78%) and lup-20(29)-en-3-one (21.04%). Based on a literature study, the presence of phytol, neophytadiene, β-caryophyllene, stigmasterol, γ-sitosterol, and lup-20(29)-en-3-one have contributed to the strong α-glucosidase inhibitory activity of n-Hexane extract of Merremia vitifolia leaves.

Keywords: GC-MS; Inhibition of α-glucosidase; Merremia vitifolia; Phytol

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