Abstract
Long-term and repeated exposure of ultraviolet (UV) light, a harmful environmental stress, on the skin often induces chronic skin diseases, such as skin cancer as well as photo-aging (premature skin aging), and the mechanisms of these skin damages are closely associated with up-regulation of matrix metalloproteinases (MMPs) activities. Here, we investigated the effect of quercetin-3-O-beta-d-(6''-feruloyl)-galactopyranoside isolated from the stems of Viola hondoensis (Violaceae) on the expression of MMPs in UV-irradiated human skin fibroblasts in vitro. Quercetin-3-O-beta-d-(6''-feruloyl)-galactopyranoside markedly reduced UV-induced MMP-1 expression at the protein levels in a dose-dependent manner. Our report is the first description for the ability of quercetin-3-O-beta-d-(6''-feruloyl)-galactopyranoside to regulate UV-induced MMP-1 expression.
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