Fig. 4

Effect of Oxya chinensis sinuosa Mishchenko extract (Oc.Ex) on matrix metalloproteinase (MMP) and procollagen expression. a MMP-1 and b MMP-9 protein levels in UVB-irradiated skin. c Western blotting of Oc. Ex effects on ultraviolet B (UVB)-mediated induction of MMP-1 and MMP-9. Data are compared with those of the normal (^####p < 0.0001) and vehicle (****p < 0.0001 and ***p < 0.001) groups. Nor, Normal; Veh, Vehicle; Oc. Ex, Oxya chinensis sinuosa Mishchenko extract