The effect of miR-144 on A549 cell apoptosis. A. Flow cytometry of A549 cells in normal control, negative control, and miR-144 mimics groups. B. Apoptotic rate of A549 cells in normal control, negative control, and miR-144 mimics groups. *, P < 0.05 compared with normal control group; #, P < 0.05 compared with negative control group.