The effect of miR-503 on cell proliferation, clonogenicity in vitro . (A) The expression of miR-503 in MHCCLM3, HepG2 and Bel-7402 cells with transfection of miR-503 mimic, miR-503 inhibitor or respective NC. (B) The effects of miR-503 on the proliferation of HCC cell lines were measured by CCK-8 assay. (C) The effect of miR-503 on colony formation of HCC cell lines. **P< 0.01; ***P<0.001.