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The effect of Opuntia humifusa fruit water extract (OHE) on solar ultraviolet (sUV)-radiated ex vivo human skin. (a) Histopathological analysis of matrix metalloproteinase-1 (MMP-1) and hematoxylin and eosin (H&E)-stained sections in human skin. (b) MMP-1 protein levels in human skin. MMP-1 expression was measured using western blot analysis, as described in Materials and Methods. (c) Qualitative data of epidermal thickness of human skin.
