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Ref Type Journal Article
PMID (23298836)
Authors Parker BC, Annala MJ, Cogdell DE, Granberg KJ, Sun Y, Ji P, Li X, Gumin J, Zheng H, Hu L, Yli-Harja O, Haapasalo H, Visakorpi T, Liu X, Liu CG, Sawaya R, Fuller GN, Chen K, Lang FF, Nykter M, Zhang W
Title The tumorigenic FGFR3-TACC3 gene fusion escapes miR-99a regulation in glioblastoma.
Journal The Journal of clinical investigation
Vol 123
Issue 2
Date 2013 Feb
URL
Abstract Text Fusion genes are chromosomal aberrations that are found in many cancers and can be used as prognostic markers and drug targets in clinical practice. Fusions can lead to production of oncogenic fusion proteins or to enhanced expression of oncogenes. Several recent studies have reported that some fusion genes can escape microRNA regulation via 3'-untranslated region (3'-UTR) deletion. We performed whole transcriptome sequencing to identify fusion genes in glioma and discovered FGFR3-TACC3 fusions in 4 of 48 glioblastoma samples from patients both of mixed European and of Asian descent, but not in any of 43 low-grade glioma samples tested. The fusion, caused by tandem duplication on 4p16.3, led to the loss of the 3'-UTR of FGFR3, blocking gene regulation of miR-99a and enhancing expression of the fusion gene. The fusion gene was mutually exclusive with EGFR, PDGFR, or MET amplification. Using cultured glioblastoma cells and a mouse xenograft model, we found that fusion protein expression promoted cell proliferation and tumor progression, while WT FGFR3 protein was not tumorigenic, even under forced overexpression. These results demonstrated that the FGFR3-TACC3 gene fusion is expressed in human cancer and generates an oncogenic protein that promotes tumorigenesis in glioblastoma.

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Molecular Profile Treatment Approach
FGFR3 - TACC3 U0126
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
FGFR3 over exp glioblastoma sensitive U0126 Preclinical Actionable In a preclinical study, U0126 inhibited downstream signaling and growth of glioblastoma cells over-expressing Fgfr3 in culture (PMID: 23298836). 23298836
FGFR3 - TACC3 glioblastoma sensitive U0126 Preclinical Actionable In a preclinical study, U0126 inhibited downstream signaling and growth of glioblastoma cells expressing the FGFR3-TACC3 fusion in culture (PMID: 23298836). 23298836