E2F2 and breast cancer: Double luciferase report confirmed that miR-146b-3p can target E2F2, and qRT-PCR and WB also found that E2F2 changed in different degrees in BC cells after transfection with miR-146b-3p-mimics and anti-miR-146b-3p, suggesting that miR-146b-3p and E2F2 had targeted regulation.