MDM2 and liver cancer: Simultaneously, mdm2 protein levels were higher in BEL-7402, SMMC-7721, MHCC-97 L, HepG2, HCCLM3, and Hep-3B liver cancer cell lines compared to the normal liver cell line L-02, while wtp53 expression was almost obliterated in all the liver cancer cell lines except for Hep-3B.