the apoptosis rate and Rb gene mRNA level changes of HepG2 cells at 24, 48 and 72 hours were measured by flow cytometry analysis and RT-PCR method, respectively.

• 以流式细胞术检测各组细胞24,48,72h凋亡率; RT-PCR方法检测各组细胞24,48,72h细胞内Rb基因mRNA表达量。