Of 30 herbal plants tested, the methanol extracts of Eucommia ulmoides (52%), Evodia officinalis (45%), and Pleuropterus multiflorus (41%) each showed a potent inhibitory effect on the matrix metalloproteinase-1 (MMP-1) production in ultraviolet B (UVB)-irradiated human fibroblasts. Aucubin was isolated as the MMP-1 inhibitor from E. ulmoides, and significantly suppressed the production of MMP-1 by nearly 57% compared to the control. It also reduced MMP-1 mRNA expression. These results suggest that aucubin is a photoprotective phytochemical, and could be used as a potential agent in preventing photoaging.
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