Fig. 5

Apoptosis induced by each treatment for 12 h on cisplatin-resistant A549 cells (a) and cisplatin-sensitive A549 cells (b). The apoptotic cells include both early apoptotic and late apoptotic cells. a The concentrations of DDP and TET were 60 µM and 0.25 µg/ml, respectively. b The concentrations of DDP and TET were 25 µM and 0.25 µg/ml, respectively. c, d are the statistical analyses of a, b. *p < 0.05 versus the control cells, ^#p < 0.05 versus the DDP treatment (n = 3)