METTL3 and breast cancer: To identify the roles of m6A regulators in BC, we first screened the expression of key m6A writers (METTL3, METTL14, and WTAP), erasers (ALKBH5 and FTO), and readers (YTHDC1, YTHDC2, YTHDF1, YTHDF3, IGF2BP1, IGF2BP2, and IGF2BP3) in BC samples and the paired normal breast tissues using The Cancer Genome Atlas (TCGA) data.