Comprehensive FGFR3 alteration-related transcriptomic characterization is involved in immune infiltration and correlated with prognosis and immunotherapy response of bladder cancer.

{"sci_version": "1.2", "schema": "https://corpus.bntrg.co.uk/sci/1.0/sci.schema.json", "id": "pmid:35958598", "kind": "science-record", "revision": 4, "content_hash": "sha256:1b51e62c2d11c2b9f22542eb3c0d58537622eb45b9b6193a03ab77799c47d7ca", "created_at": "2026-11-01T18:15:04Z", "updated_at": "2026-11-01T22:07:14Z", "generator": {"name": "corpus-assay-engine", "run_id": "reading-sci-2026-11-01"}, "paper": {"state": "complete", "title": "Comprehensive FGFR3 alteration-related transcriptomic characterization is involved in immune infiltration and correlated with prognosis and immunotherapy response of bladder cancer.", "doi": "10.3389/fimmu.2022.931906", "pmid": "35958598", "authors": ["Ting Xu", "Weizhang Xu", "Yuxiao Zheng", "Xiao Li", "Hongzhou Cai", "Zicheng Xu", "Qing Zou", "Bin Yu"], "journal": "Frontiers in immunology", "year": 2022, "abstract": "Background: Bladder cancer (BC) threatens the health of human beings worldwide because of its high recurrence rate and mortality. As an actionable biomarker, fibroblast growth factor receptor 3 (FGFR3) alterations have been revealed as a vital biomarker and associated with favorable outcomes in BC. However, the comprehensive relationship between the FGFR3 alteration associated gene expression profile and the prognosis of BC remains ambiguous.\nMaterials and Methods: Genomic alteration profile, gene expression data, and related clinical information of BC patients were downloaded from The Cancer Genomics database (TCGA), as a training cohort. Subsequently, the Weighted Gene Co-expression Network Analysis (WGCNA) was conducted to identify the hub modules correlated with FGFR3 alteration. The univariate, multivariate, and least absolute shrinkage and selection operator (LASSO) Cox regression analyses were used to obtain an FGFR3 alteration-related gene (FARG) prognostic signature and FARG-based nomogram. The receiver operating characteristic (ROC) curve analysis was used for evaluation of the ability of prognosis prediction. The FARG signature was validated in four independent datasets, namely, GSE13507, GSE31684, GSE32548, and GSE48075, from Gene Expression Omnibus (GEO). Then, clinical feature association analysis, functional enrichment, genomic alteration enrichment, and tumor environment analysis were conducted to reveal differential clinical and molecular characterizations in different risk groups. Lastly, the treatment response was evaluated in the immunotherapy-related dataset of the IMvigor210 cohort and the frontline chemotherapy dataset of GSE48276, and the chemo-drug sensitivity was estimated via Genomics of Drug Sensitivity in Cancer (GDSC).\nResults: There were a total of eleven genes (CERCAM, TPST1, OSBPL10, EMP1, CYTH3, NCRNA00201, PCDH10, GAP43, COLQ, DGKB, and SETBP1) identified in the FARG signature, which divided BC patients from the TCGA cohort into high- and low-risk groups. The Kaplan-Meier curve analysis demonstrated that BC patients in the low-risk group have superior overall survival (OS) than those in the high-risk group (median OS: 27.06 months vs. 104.65 months, p < 0.0001). Moreover, the FARG signature not only showed a good performance in prognosis prediction, but also could distinguish patients with different neoplasm disease stages, notably whether patients presented with muscle invasive phenotype. Compared to clinicopathological features, the FARG signature was found to be the only independent prognostic factor, and subsequently, a FARG-based prognostic nomogram was constructed with better ability of prognosis prediction, indicated by area under ROC curve (AUC) values for 1-, 3-, and 5-year OS of 0.69, 0.71, and 0.79, respectively. Underlying the FARG signature, multiple kinds of metabolism- and immune-related signaling pathways were enriched. Genomic alteration enrichment further identified that FGFR3 alterations, especially c.746C>G (p.Ser249Cys), were more prevalent in the low-risk group. Additionally, FARG score was positively correlated with ESTIMATE and TIDE scores, and the low-risk group had abundant enrichment of plasma B cells, CD8+ T cells, CD4+ naive T cells, and helper follicular T cells, implying that patients in the low-risk group were likely to make significant responses to immunotherapy, which was further supported by the analysis in the IMvigor210 cohort as there was a significantly higher response rate among patients with lower FARG scores. The analysis of the GDSC database finally demonstrated that low-risk samples were more sensitive to methotrexate and tipifarnib, whereas those in the high-risk group had higher sensitivities in cisplatin, docetaxel, and paclitaxel, instead.\nConclusion: The novel established FARG signature based on a comprehensive FGFR3 alteration-related transcriptomic profile performed well in prognosis prediction and was also correlated with immunotherapy and chemotherapy treatment responses, which had great potential in future clinical applications.", "claims": [{"id": "claim-method", "statement": "The univariate, multivariate, and least absolute shrinkage and selection operator (LASSO) Cox regression analyses were used to obtain an FGFR3 alteration-related gene (FARG) prognostic signature and FARG-based nomogram.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:35958598", "locator": "sections[0] \"Abstract\" paragraph 2", "quote": "The univariate, multivariate, and least absolute shrinkage and selection operator (LASSO) Cox regression analyses were used to obtain an FGFR3 alteration-related gene (FARG) prognostic signature and FARG-based nomogram."}], "state": "complete"}, {"id": "claim-data-access", "statement": "In the present study, publicly available datasets, including training group of TCGA-BC cohort (MSK/TCGA, 2020, https://www.cbioportal.org/study/summary?id=blca_msk_tcga_2020) and validation groups of GSE13507, GSE31684, GSE32548, GSE48075 datasets from GEO database (http://www.ncbi.nlm.nih.gov/geo/), were analyzed for construction of prognostic signature. The IMvigor210 cohort of BC patients receiving immunotherapy was retrieved from the following website: https://clinicaltrials.gov/ct2/show/NCT02108652. The GSE48276 dataset was downloaded from the GEO for chemotherapy response evaluation.", "kind": "methodological", "target": null, "evidence": [{"asset": "source:pmid:35958598", "locator": "sections[24] \"Data availability statement\" paragraph 2", "quote": "In the present study, publicly available datasets, including training group of TCGA-BC cohort (MSK/TCGA, 2020, https://www.cbioportal.org/study/summary?id=blca_msk_tcga_2020) and validation groups of GSE13507, GSE31684, GSE32548, GSE48075 datasets from GEO database (http://www.ncbi.nlm.nih.gov/geo/), were analyzed for construction of prognostic signature. The IMvigor210 cohort of BC patients receiving immunotherapy was retrieved from the following website: https://clinicaltrials.gov/ct2/show/NCT02108652. 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