Figure 6. UVB-induced cytotoxicity in TKE2 cells in vitro. AST was added to a culture of UVB-irradiated TKE2 cells. Cytotoxicity after UVB exposure in keratinocyte cultures was significantly decreased by AST in a dose-dependent manner (1 mg/ml: p<0.01, 0.1 mg/ml: p<0.05, and 0.01 mg/ml: not significant).