Investigation of the expression of individual m6A-related genes revealed that our gastric cancer samples had relatively increased expression of most m6A-related genes compared with normal gastric tissues, except for METTL3, METTL14, METTL16, and ALKBH5 (Fig. 7b), which are important genes for determining cellular m6A levels. This evidence concerns the gene METTL14 and gastric cancer.