Effect of arbutin, ursolic acid and EGCG on catalase expression in human fibroblast WS-1 cells after irradiation with UVABaaData expressed in mean±S.D. from triplicate experiments. *0.1>p>0.05 compared with the blank, #p<0.01 compared with the control.

UVAB irradiation =UVA (385nm, 1500 μw/cm2, 100 mJ/cm2) plus UVB (302nm, 1500 μw/cm2, 100mJ/cm2).

Blank: without any treatment. Concentration at 0mM: cells treated with UVAB irradiation in the absence of AB and UA. Concentration at 1.0mM: cells treated with UVAB irradiation in the presence of 1.0M of AB, UA, and EGCG, respectively. EGCG was used as the positive control.