Effect of triptolide on the levels of skin surface lipids in auricles from UVB-irradiated hamsters. The lipids on the skin surface of the vehicle- (white columns) and triptolide-treated (black columns) auricles of UVB-irradiated hamsters were extracted and subjected to TLC analysis. Data are presented as the mean ± standard deviation from three individual extracts. *P<0.05 vs. vehicle-treated hamsters. TG, triacylglycerol; FFAs, free fatty acids; Ch, cholesterol; UVB, ultraviolet B; TLC, thin-layer chromatography; TG, triacylglycerol; FFAs, free fatty acids; Ch, cholesterol.