Based on recent data showing that Cebpb is targeted by microRNA-155 (miR-155) in B cells and macrophages,29, 30 and the fact that miR-155 is a well-known oncomiR in breast cancer, we hypothesized that miR-155 could have a role in repressing C/EBPβ during TGF-β-induced EMT. The gene discussed is TGFB1; the disease is breast cancer.