Résumé
Objective To study the changes of Caspase8 and Caspase3 protein in HL-60 cells during apoptosis induced by psoralen (PSO) plus ultraviolet A (UVA). Methods HL-60 cells were treated with PSO, extracted from Chinese medicine psoralea fruits in different concentrations, plus UVA of wave length 360 nm in different irradiation time. The apoptosis ratios, ultrastructure changes and the expression of Caspase8 and Caspase3 protein were detected. The factorial design and analysis of variance were used to analyze the interaction among the factors. Results PSO, UVA and PUVA all increased the apoptosis ratios and up-regulated the expression of Caspase8 and Caspase3 protein, but the effects of PUVA were the strongest. There were obvious changes about apoptosis under the electron microscope after treatment with PUVA. Conclusions PUVA can induce the apoptosis of HL-60 cells and activate Caspase8 and Caspase3 gene.