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Immunosenescence refers to the immune system undergoing a series of degenerative changes with advancing age and is tightly associated with the initiation and progression of cancers. However, the immunosenescence-related genes as critical biomarkers for bladder cancer (BLCA) have not been systematically analyzed. We retrieved the immunosenescence-related genes from the public database and verified their association with hallmarks of immunosenescence based on The Cancer Genome Atlas (TCGA) cohort. Through gene pairing, Lasso, and univariate Cox regression, an 8-gene pair model was constructed to evaluate the overall survival of BLCA, which was then validated in the training cohort ( P &lt; 0.001 , n = 396 ), two external validation cohorts ( P &lt; 0.05 , n = 165 ;  P &lt; 0.001 , n = 224 ), and local samples ( P &lt; 0.05 , n = 10 ). We also downloaded the clinical information and gene expression matrices of other 32 different cancers from TCGA. The established model showed significant predictive value for the prognosis in 15 cancers ( P &lt; 0.05 ). The risk model could also serve as a promising predictor for immunotherapeutic response, which has been verified by the TIDE algorithm ( P &lt; 0.05 ), IMvigor210 dataset ( P &lt; 0.01 , n = 298 ), and other two datasets correlated with immunotherapy ( P &lt; 0.05 , n = 56 ;  P = 0.17 , n = 27 ). The TCGA dataset, in vitro cell experiments, and pan-cancer analysis displayed that the gene signature was associated with cisplatin sensitivity ( P &lt; 0.05 ). Overall, we proposed a novel immunosenescence-related gene signature to predict prognosis, immunotherapeutic response, and cisplatin sensitivity of BLCA, which were validated in different independent cohorts, local samples, and pan-cancer analyses.

An Immunosenescence-Related Gene Signature to Evaluate the Prognosis, Immunotherapeutic Response, and Cisplatin Sensitivity of Bladder Cancer