RETREG1 and hepatocellular carcinoma: We found that overexpression of FAM134B was observed in most of HCC cell lines with mesenchymal cell lines (HLF and SMMC7721), compared to that in normal liver cell lines (HL‐7702; Fig. 1C) as well as epithelial cell lines (Huh7, PLC8024, HepG2 and Hep3B).