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Wong, Kim; van der Weyden, Louise; Schott, Courtney R; Foote, Alastair; Constantino-Casas, Fernando; Smith, Sionagh; Dobson, Jane M; Murchison, Elizabeth P; Wu, Hong; Yeh, Iwei; Fullen, Douglas R; Joseph, Nancy; Bastian, Boris C; Patel, Rajiv M; Martincorena, Inigo; Robles-Espinoza, Carla Daniela; Iyer, Vivek; Kuijjer, Marieke L; Arends, Mark J; Brenn, Thomas; Harms, Paul W; Wood, Geoffrey A; Adams, David J
Nature communications, 01/2019, Volume: 10, Issue: 1Journal Article
Mucosal melanoma is a rare and poorly characterized subtype of human melanoma. Here we perform a cross-species analysis by sequencing tumor-germline pairs from 46 primary human muscosal, 65 primary canine oral and 28 primary equine melanoma cases from mucosal sites. Analysis of these data reveals recurrently mutated driver genes shared between species such as NRAS, FAT4, PTPRJ, TP53 and PTEN, and pathogenic germline alleles of BRCA1, BRCA2 and TP53. We identify a UV mutation signature in a small number of samples, including human cases from the lip and nasal mucosa. A cross-species comparative analysis of recurrent copy number alterations identifies several candidate drivers including MDM2, B2M, KNSTRN and BUB1B. Comparison of somatic mutations in recurrences and metastases to those in the primary tumor suggests pervasive intra-tumor heterogeneity. Collectively, these studies suggest a convergence of some genetic changes in mucosal melanomas between species but also distinctly different paths to tumorigenesis.
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