Mitsuoka et al. found that a newly synthesized dipeptide, 4-(4-methoxyphenyl)-L-phenylalanyl sarcosine which was an inhibitor of PEPT1, resulted in nearly complete suppression of the xenograft growth of human pancreatic cancer AsPC-1 cells that highly expressed PEPT1[141]. Here, SLC15A1 is linked to familial pancreatic carcinoma.