LINC01977 and hepatocellular carcinoma: To investigate the biological function of LINC01977 in HCC, we first established stable LINC01977 knockdown cell lines (MHCC97H and HepG2) and LINC01977 overexpression cell lines (SMMC7721 and Hep3B) and verified the efficiencies of knockdown and overexpression using qRT-PCR (Supplementary Fig. S2A, B).