A. Growth curve of HO-8910 PM cells infected with control or siRNA-PDCD6. At each indicated time point, cell viability was determined and represented as the degree of absorbance 570 nm using the MTT. The mean ± SD absorbance (triplicate wells) for each time point is plotted as a function of the number of days after seeding. B. Cell cycle distribution in shRNA-PDCD6-HO-8910 PM and HO-8910 PM-mock cells. C. Apoptosis analysis in shRNA-PDCD6-HO-8910 PM and HO-8910 PM-mock cells by Hoechst 33258 staining. Normal cells showed normal nuclei blue, while apoptotic cells showed the cell nucleus was chunky, stainded densely and brightly.