Our study reveals that the protein and mRNA expression of PEPT1 were higher in HCC cells Bel-7402 and HepG2, as well as in Caco-2 cells, compared with normal liver cell line HL-7702, according to Western blotting and real-time RT-PCR (Figure 1A and 1B). Here, SLC15A1 is linked to hepatocellular carcinoma.