Melanogenesis inhibitors from Coix lacryma-jobi seeds in B16-F10 melanoma cells. - GreenMedInfo Summary
Melanogenesis inhibitors from Coix lacryma-jobi seeds in B16-F10 melanoma cells.
Nat Prod Res. 2017 Dec ;31(23):2712-2718. Epub 2017 Feb 16. PMID: 28278663
An adenine derivative, 9-β-D-glucopyranosyl adenine, reported for the first time from a natural source, in addition to nine known compounds were isolated from the seeds of Coix lacryma-jobi. Their structures were elucidated based on extensive spectroscopic and chemical studies. The isolated compounds and the ethanol extract have been assayed for melanin inhibition using B16-F10 melanoma cell line. The results of our study suggested the potential use of Coix lacryma-jobi seeds as a skin whitening agent and reveal the seeds to be a rich source of important phytochemicals with melanogenesis inhibitory activity. Among the isolated compounds, coixol (2) and 2-O-β-glucopyranosyl-7-methoxy-2H-1,4-benzoxazin-3(4H)-one (8) exhibited potent melanogenesis inhibitory activity with no obvious melanocytotoxicity. The rest of the compounds showed weak to moderate activity.