HepG2 cell lines were purchased from the Korean Cell Line
Bank (KCLB; Seoul, South Korea). Cellswere cultured byDMEM
supplemented with 10% FBS, 1% nonessential amino acids, 1%
penicillin/streptomycin solution, and 0.1% gentamicin, and then
they were maintained under an atmosphere of 95% air and 5%
CO2 at 37 °C. Cell culture medium was changed every other day.