In non-small-cell lung carcinoma (NSCLC) cells, it was recently described that miR-33a, by targeting the 3′-UTR of METTL3 mRNA, reduces the expression of METTL3 at both mRNA and protein levels and, eventually, global m6A mRNA methylation, with a functional reduction of cellular proliferation and anchorage-independent growth (Du et al., 2017). Here, METTL3 is linked to non-small cell lung carcinoma.