The expression of circ_BICD2 was overexpressed in OSCC tumor tissues and cell line. A. RT-qPCR revealed that the level of circ_BICD2 in OSCC tumor tissues and paired adjacent tissues. B. RT-qPCR was applied to detect the expression level of circ_BICD2 in human OSCC cell lines and normal human oral epithelial cell lines. Data are presented as means ± SD of three independent experiments. ***P<0.001, vs the paired adjacent tissues; #P<0.05, ##P<0.01, ###P<0.001, vs the SG cells; ▲P<0.05, ▲▲P<0.01, ▲▲▲P<0.001, vs the NOK cells.