[Objective] To investigate the impact of knockdown of PRDM5 gene on proliferation and apoptosis of normal human bronchial epithelial cells BEAS-2 B by dox induced Tet-On controlled system. [Methods] PRDM5 stably knockdown BEAS-2 B cell line was generated by cotransfection of recombinant lentiviral vector containing p LKO-Tet-On-PRDM5-shRNA or the p LKO-Tet-On-control-shRNA together with packaging plasmids,respectively. The change of PRDM5 protein level was detected by Western Blot. The MTT assay was used to...