Furthermore, we explore the potential function of gene C7 in gastric cancer, based on GEPIA data, we analyzed the differential expression of C7 in gastric cancer tissues and adjacent normal tissues and found that the level of C7 mRNA in gastric cancer tissues (n = 408) was significantly depressed when compared with that in adjacent normal tissues (n = 211) (Fig. 1A). This evidence concerns the gene C7 and gastric cancer.