Figure 3. Downregulation of miR-155-5p enhances the pro-apoptotic effect of cetuximab in TNBC cells. EGFR-overexpressed MDA-MB-468 cells were treated with cetuximab (10 nM) and/or the miR-155-5p antagomir (10 nM) for 72 h. (A, B) Apoptotic cells were detected by flow cytometry. (C) The expression levels of Bax, Bcl-2, and cleaved caspase-3 in cells were detected by Western blotting. (D–F) The relative expressions of Bax, Bcl-2, and cleaved caspase-3 were normalized to β-actin. *P < 0.05, **P < 0.01 compared with the control group. ##P < 0.01 compared with the cetuximab 10 nM group.