Since STING is broadly expressed in normal leukocytes, epithelial cells, and cancer cells, we performed immunoblot to examine STING expression in monocytes, macrophages, and CD3+ T cells derived from peripheral blood mononuclear cells (PBMCs) from healthy donors, as well as in patient-derived GC cells and HGC-27 GC cell line. Here, STING1 is linked to gastric cancer.