METTL3 and gastric cancer: To decipher the hidden mechanism of miR-1269b in GC progression, we predicted the downstream target of miR-1269b through StarBase online analysis database (http://starbase.sysu.edu.cn/), and found that there was a binding site between miR-1269b and METTL3 mRNA 3ʹ-UTR (Figure 3 A).