GSE1 overexpressing plasmids or control Vec plasmids were transfected into HER2-positive gastric cancer cells MKN45 and NCI-N87, and these cells were indicated as MKN45-GSE1, MKN45-Vec, NCI-N87-GSE1, and NCI-N87-Vec, respectively. Here, ERBB2 is linked to gastric cancer.