Kasumi-1 and HL-60 cells were infected with lentivirus containing either ConshRNA (Con) or SurshRNA (S3, S4, and S5). A & B, After 48 hr, cells were collected and subjected to flow cytometric analysis of cell cycle distribution. Data show the representative of three independent experiments. C, After 48 or 72 hr, cells were collected and subjected to Western blot analyses with specific antibody directed against survivin, γH2A.X (Ser139), H2A.X, P-CHK2 (Thr68), CHK2, or β-actin.