Effects of PDCD4 on MHCC-97H cell proliferation and apoptosis. A: Western blot analysis for identification of transfection efficiency. B: MTT assay for cell proliferation. C: Flow cytometric assay for cell apoptosis. D: Hoechst 33258 staining for cell apoptosis (×200). Morphological changes of cell apoptosis were shown as chromatin condensation and nuclear fragmentation. Representative images are shown from three individual experiments. In C and D, a or Group1, b or Group 2, and c or Group3 represents cells of MHCC-97H-PDCD4, MHCC-97H-vector and MHCC-97H, respectively; d shows statistical analysis for each assay. Bars represent the means ± SD. The difference between Group1 and Group2 or Group3 was significant (P < 0.01).