Figure 4.
Effect of S4 on UVB-induced (a) AP-1 and (b) phosphorylation of mitogen-activated protein (MAP) kinases in human skin fibroblasts. The results were given as mean ± standard deviation (n = 3). Significant difference versus non-irradiation group: ###, p < 0.001. Significant difference versus non-treatment group: **, p < 0.01; ***, p < 0.001.