The results of EdU cell proliferation assay and colony formation assay showed that overexpression of SLC52A3 in both MGC803 and AGS increased rate of EdU‐positive cells and number of clones, which indicated that SLC52A3 could promote gastric cancer cells proliferation (Figure 4A‐C, E‐F). The gene discussed is SLC52A3; the disease is gastric cancer.