Research Paper Volume 12, Issue 11 pp 10578—10593

Figure 4. Inhibition of CARM1 enzymatic activity represses CCNE2 expression in NSCLC cells. (A) ChIP analysis of human CCNE2 promoter by antibodies against CARM1, H3R17me2a, H3R26me2a or IgG in DMSO or EZM2302-treated (10 nM) PC9 and HCC827 cells. Relative enrichment of CARM1, H3R17me2a and H3R26me2a marks on the promoter regions was analyzed by real-time PCR assays. The data were presented as means ± SDs of three independent experiments; **P < 0.01, ^#P > 0.05. (B) The protein levels of CCNE2, H3R17me2a and H3R26me2a were downregulated in EZM2302-treated (10 nM) PC9 and HCC827 cells by Western blot. GAPDH or histone H3 were used as loading controls. (C) The mRNA levels of CCNE2 was downregulated in EZM2302-treated (10 nM) PC9 and HCC827 cells by Real-time PCR assays. β-actin was used as an internal control. The data were shown as means ± SDs of three independent experiments; **P < 0.01. (D) Cell proliferation abilities of DMSO or EZM2302-treated (10 nM) PC9 and HCC827 cells were assessed by CCK-8 assays. The data were presented as means ± SDs of three independent experiments; **P < 0.01. (E) Colony-formative abilities of DMSO or EZM2302-treated (10 nM) PC9 and HCC827 cells were determined by colony-formation assays. Right panel, the relative colony-formative abilities (% of NC) were quantified. The data were shown as means ± SDs of three independent experiments; **P < 0.01.