We performed western blot experiments to evaluate the expression of proteins associated with the STING signaling pathway, including STING, phosphorylated STING (pSTING), TBK1, phosphorylated TBK1 (pTBK1), IRF3, and phosphorylated IRF3 (pIRF3), in both the parental gastric cancer cell line SGC‐7901 and its cisplatin‐resistant counterpart SGC‐7901/DDP. Here, IRF3 is linked to gastric cancer.