Figure 4: sCLU silencing on DDP-induced apoptosis in A549 cells. (A) A549DDP cells, A549DDP cells stably transfected with control or sCLU were treated with 1-50 μM cisplatin for 72 h. Apoptosis was analyzed by TUNEL analysis. (B) A549 cells, A549 cells stably transfected with control or sCLU-shRNA were treated with 1-50 μM cisplatin for 72 h. Apoptosis was analyzed by TUNEL analysis. Boxes, mean; bars, ± SD. *P<0.05, **P<0.01 (compared with control or cells transfected with mock expression plasmid).