The HepG2, Huh7, J7 and Hep3B human hepatoma cell lines were routinely cultured in Dulbecco’s modified Eagle’s medium (DMEM; Invitrogen, Grand Island, NY) supplemented with 10% fetal bovine serum (HyClone, Road Logan, UT), 100 U/ml penicillin and 100 mg/ml streptomycin at 37 °C with 5% CO2. The hepatoma cells were stimulated with 0–10 μM sorafenib (Sigma–Aldrich, Burlington, MA).
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