In the study of the expression of GGT5 in gastric cancer and its correlation with immune cell infiltration, it was found that GGT5 was highly expressed in gastric cancer, and its expression level was positively correlated with the infiltration of dendritic cells, macrophages and natural killer cells, and negatively correlated with the infiltration of Th17 (77). This evidence concerns the gene GGT5 and gastric cancer.