Expression of CXCL9 in the tumour tissues of PAAD patients correlated with its CXCR3 expression (Figure 5D) and treatment of CXCL9 could significantly induce the expression of CXCR3 in CD8+ cytotoxic cells (Figure 5E). The gene discussed is CXCR3; the disease is pancreatic adenocarcinoma.