CXCL9 and pancreatic adenocarcinoma: With regard to T-cell exhaustion, Cannon et al. demonstrated, through an analysis of T-cell-related genes and CXCL9, 10, and 11 expression in PAAD samples from the TCGA dataset, that T-cell exhaustion, and the PD-1 and PD-L1 pathways correlated with CXCL9, 10, and 11 expression [159].