METTL3 and breast cancer: We next confirmed the expression level of METTL3 in 10 breast cell lines, including 9 breast cancer cell lines (MDA-MB-231, MDA-MB-469, MCF-7, BT-20, BT-483, BT-474, BT-549, T47D and SKBR3) and one HME cell lines (MCF-10A).