APOF and hepatocellular carcinoma: We determined the mRNA and protein expression of ApoF in HCC cell lines (SMMC-7721, HepG2, and Huh7) and normal liver cell line (LO2) and found that HepG2 and Huh7 cells exhibited low ApoF expression, whereas SMMC-7721 cells exhibited moderate ApoF expression; LO2 cell line showed high ApoF expression (Figure 1B).