Fig. 4

CCAAT/enhancer-binding protein β (C/EBPβ) overexpression inhibited Id4 expression in Huh7 cells. a, b Real-time PCR and Western blotting analysis show that C/EBPβ mRNA and protein expression are significantly induced in Huh7 cells. c, d Id4 mRNA and protein expression are inhibited in the C/EBPβ-overexpressing Huh7 cells. *P < 0.05, **P < 0.01