METTL3 and gastric cancer: For example, upregulated m6A “Writers” METTL3, WTAP and RBM15 mediated poor prognosis of GC by regulating m6A, and upregulated “Erasers” ALKBH5 mediated poor prognosis of GC by regulating the m6A/lncRNA NEAT1/EZH2 axis (Zhang J. et al., 2019; He et al., 2019; Su et al., 2019; Yue et al., 2019; Zhu et al., 2019; Wang et al., 2020; Yang et al., 2020).