Figure 3.
Berberine (BBR) mediates BNIP3 expression by enhancing the binding of HIF-1α to the BNIP3 promoter. (A) A dual-luciferase reporter assay assessed the effects of BBR on HIF-1α and BNIP3 transcriptional activity in H9C2 cells. (B) A chromatin immunoprecipitation (ChIP) PCR analysis was used to show the effects of BBR on HIF-1α and BNIP3 promoter binding, and HIF-1α knockdown weakened their binding activity. 1, control group; 2, H/R group; 3, BBR+H/R group; 4, siNC+BBR+H/R group; 5, siHIF-1α+BBR+H/R group. The data are the means ± SD (n=3). *P < 0.05 compared to the control group; #P < 0.05 compared to the H/R group; &P < 0.05 compared to the BBR+H/R group.