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Effects of SMGGT water extract on UVB-induced expression of MMP-1 (a) and type-1 procollagen (b) in human skin dermal fibroblast cells. After UVB-irradiation (40 mJ/cm2), cells were cultured with or without various concentrations of SMGGT for 24 h. Each evaluation was performed in triplicate. Data are expressed as means ± S.E.M. # p < 0.05 and ## p < 0.01 vs. vehicle control; * p < 0.05 and ** p < 0.01 vs. UVB-irradiation only
