Fig. 4

Circ_0000745 downregulation inhibited OSCC development in vitro by increasing the level of miR-488. a The efficiency of miR-488 inhibitor was checked by qPCR. In Cal-27 and SCC9 cells transfected with sh-circ_0000745#1 + anti-NC, sh-NC + anti-NC or sh-circ_0000745#1 + anti-miR-488, cell proliferation was assessed by (b) CCK-8 assay and (c) colony formation assay. d Cell apoptosis was identified by flow cytometry assay. e, f Cell cycle distribution at different phases was monitored by flow cytometry assay. g The protein levels of PCNA, Cleaved-caspase 3 and CCND1 were quantified by western blot. *P < 0.05, **P < 0.01 and ***P < 0.001