GRCh38 · COSMIC v94

Summary

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Reference
Multi-dimensional genomic analysis of myoepithelial carcinoma identifies prevalent oncogenic gene fusions.
Paper ID
COSP44534
Authors
Dalin MG, Katabi N, Persson M, Lee KW, Makarov V, Desrichard A, Walsh LA, West L, Nadeem Z, Ramaswami D, Havel JJ, Kuo F, Chadalavada K, Nanjangud GJ, Ganly I, Riaz N, Ho AL, Antonescu CR, Ghossein R, Stenman G, Chan TA and Morris LGT
Affiliation
Human Oncology and Pathogenesis Program, Memorial Sloan Kettering Cancer Center, New York, NY, 10065, USA.
Journal
Nature communications, 2017;8(1):1197
ISSN: 2041-1723
PMID: 29084941 (view at PubMed or Europe PMC)
Abstract
Myoepithelial carcinoma (MECA) is an aggressive salivary gland cancer with largely unknown genetic features. Here we comprehensively analyze molecular alterations in 40 MECAs using integrated genomic analyses. We identify a low mutational load, and high prevalence (70%) of oncogenic gene fusions. Most fusions involve the PLAG1 oncogene, which is associated with PLAG1 overexpression. We find FGFR1-PLAG1 in seven (18%) cases, and the novel TGFBR3-PLAG1 fusion in six (15%) cases. TGFBR3-PLAG1 promotes a tumorigenic phenotype in vitro, and is absent in 723 other salivary gland tumors. Other novel PLAG1 fusions include ND4-PLAG1; a fusion between mitochondrial and nuclear DNA. We also identify higher number of copy number alterations as a risk factor for recurrence, independent of tumor stage at diagnosis. Our findings indicate that MECA is a fusion-driven disease, nominate TGFBR3-PLAG1 as a hallmark of MECA, and provide a framework for future diagnostic and therapeutic research in this lethal cancer.
Paper Status
Curated