Figure 2.

Inhibitory effects of tectorigenin against UV-B-induced cell death in HaCaT cells. The cells were treated with tectorigenin at 0.1, 1, and 10 μM or vitamin C at 200 μM for 24 h (A). The cells were irradiated with 25 mJ/cm² UV-B and treated with tectorigenin at 0.1, 1, and 10 μM or vitamin C at 200 μM for 24 h (B). Cell viability was measured by an MTT assay. Values are given as the mean ± the standard error of the mean (SEM). *** p < 0.001 versus control group, ## p < 0.01, ### p < 0.001 versus UV-B-only treated group.