Fig. 7

CCND1 knockdown inhibited OSCC cell growth. a The efficiency of CCND1 knockdown was checked by qPCR. In Cal-27 and SCC9 cells transfected with si-CCND1 or si-NC, cell proliferation was assessed by (b) CCK-8 assay and (c) colony formation assay. d Cell apoptosis and (e) cell cycle distribution were investigated by flow cytometry assay. f, g The protein levels of PCNA and Cleaved-caspase 3 in these transfected cells were quantified by western blot. **P < 0.01 and ***P < 0.001