First, we evaluated the expression of lysosomal-associated membrane protein 1 (LAMP1), lysosomal-associated membrane protein 2 (LAMP2), death receptor 3 (DR3), integrin β1, and integrin β2, those of which are ligands of E-selectin, VCAM-1, or ICAM-1, in five gastric cancer cell lines (MKN45, OCUM1, NUGC3, AGS, KATO III), as shown in Supplementary Fig. S2a online. This evidence concerns the gene LAMP2 and gastric cancer.