E2F2 promoter regions were hypo-acetylated with BRD4 inhibition, which correlated with E2F2 expression state (Figure 4C).To further confirm whether BRD4 is required for the overexpression of E2F2, we performed a loss of function study by generating stable BRD4 knockdown cells using shRNA in SK-Hep1, Huh7 and HepG2 liver cancer cells. Here, E2F2 is linked to liver cancer.