METTL3 and gastric cancer: To probe the role of miR-1269b/METTL3 axis in GC, we transfected pcDNA3.1-METTL3, miR-1269b mimics and miR-1269b mimic+pcDNA3.1-METTL3 into NCI-N87 cells, respectively, while si-METTL3, miR-1269b inhibitor and si-METTL3+ miR-1269b inhibitors were transfected into SNU-16 cells, respectively.