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  4. Identification of a novel FN1-FGFR1 genetic fusion as a frequent event in phosphaturic mesenchymal tumour
 
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Identification of a novel FN1-FGFR1 genetic fusion as a frequent event in phosphaturic mesenchymal tumour

Journal
Journal of Pathology
Journal Volume
235
Journal Issue
4
Pages
539-545
Date Issued
2015
Author(s)
JEN-CHIEH LEE  
YUNG-MING JENG  
Su S.-Y.
CHEN-TU WU  
KEH-SUNG TSAI  
Lee C.-H.
Lin C.-Y.
Carter J.M.
JENQ-WEN HUANG  
Chen S.-H.
SHYANG-RONG SHIH  
Mariño-Enríquez A.
Chen C.-C.
Folpe A.L.
YIH-LEONG CHANG  
Liang C.-W.
DOI
10.1002/path.4465
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84922647170&doi=10.1002%2fpath.4465&partnerID=40&md5=93d61047778ae840a2a0a46ccdabe3a7
https://scholars.lib.ntu.edu.tw/handle/123456789/473326
Abstract
Phosphaturic mesenchymal tumours (PMTs) are uncommon soft tissue and bone tumours that typically cause hypophosphataemia and tumour-induced osteomalacia (TIO) through secretion of phosphatonins including fibroblast growth factor 23 (FGF23). PMT has recently been accepted by the World Health Organization as a formal tumour entity. The genetic basis and oncogenic pathways underlying its tumourigenesis remain obscure. In this study, we identified a novel FN1-FGFR1 fusion gene in three out of four PMTs by next-generation RNA sequencing. The fusion transcripts and proteins were subsequently confirmed with RT-PCR and western blotting. Fluorescence in situ hybridization analysis showed six cases with FN1-FGFR1 fusion out of an additional 11 PMTs. Overall, nine out of 15 PMTs (60%) harboured this fusion. The FN1 gene possibly provides its constitutively active promoter and the encoded protein's oligomerization domains to overexpress and facilitate the activation of the FGFR1 kinase domain. Interestingly, unlike the prototypical leukaemia-inducing FGFR1 fusion genes, which are ligand-independent, the FN1-FGFR1 chimeric protein was predicted to preserve its ligand-binding domains, suggesting an advantage of the presence of its ligands (such as FGF23 secreted at high levels by the tumour) in the activation of the chimeric receptor tyrosine kinase, thus effecting an autocrine or a paracrine mechanism of tumourigenesis. ? 2014 Pathological Society of Great Britain and Ireland.
SDGs

[SDGs]SDG3

Other Subjects
chimeric protein; fibroblast growth factor receptor 1; protein derivative; protein FN1; protein tyrosine kinase; unclassified drug; FGFR1 protein, human; fibroblast growth factor receptor 1; fibronectin; FN1 protein, human; tumor marker; adult; Article; carcinogenesis; controlled study; enzyme activation; female; fluorescence in situ hybridization; fusion gene; gene fusion; gene overexpression; human; human tissue; male; oligomerization; phosphaturic mesenchymal tumor; priority journal; protein domain; reverse transcription polymerase chain reaction; RNA sequence; soft tissue tumor; Western blotting; aged; chemistry; complication; connective tissue tumor; genetics; high throughput sequencing; Hypophosphatemia, Familial; middle aged; pathology; Adult; Aged; Blotting, Western; Female; Fibronectins; Gene Fusion; High-Throughput Nucleotide Sequencing; Humans; Hypophosphatemia, Familial; In Situ Hybridization, Fluorescence; Male; Middle Aged; Neoplasms, Connective Tissue; Receptor, Fibroblast Growth Factor, Type 1; Reverse Transcriptase Polymerase Chain Reaction; Tumor Markers, Biological
Publisher
John Wiley and Sons Ltd
Type
journal article

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