| Literature DB >> 24531327 |
Jay Gunawardana1, Fong Chun Chan2, Adèle Telenius3, Bruce Woolcock3, Robert Kridel1, King L Tan3, Susana Ben-Neriah3, Anja Mottok3, Raymond S Lim3, Merrill Boyle3, Sanja Rogic4, Lisa M Rimsza5, Chrystelle Guiter6, Karen Leroy7, Philippe Gaulard7, Corinne Haioun8, Marco A Marra9, Kerry J Savage3, Joseph M Connors3, Sohrab P Shah10, Randy D Gascoyne1, Christian Steidl1.
Abstract
Classical Hodgkin lymphoma and primary mediastinal B cell lymphoma (PMBCL) are related lymphomas sharing pathological, molecular and clinical characteristics. Here we discovered by whole-genome and whole-transcriptome sequencing recurrent somatic coding-sequence mutations in the PTPN1 gene. Mutations were found in 6 of 30 (20%) Hodgkin lymphoma cases, in 6 of 9 (67%) Hodgkin lymphoma-derived cell lines, in 17 of 77 (22%) PMBCL cases and in 1 of 3 (33%) PMBCL-derived cell lines, consisting of nonsense, missense and frameshift mutations. We demonstrate that PTPN1 mutations lead to reduced phosphatase activity and increased phosphorylation of JAK-STAT pathway members. Moreover, silencing of PTPN1 by RNA interference in Hodgkin lymphoma cell line KM-H2 resulted in hyperphosphorylation and overexpression of downstream oncogenic targets. Our data establish PTPN1 mutations as new drivers in lymphomagenesis.Entities:
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Year: 2014 PMID: 24531327 DOI: 10.1038/ng.2900
Source DB: PubMed Journal: Nat Genet ISSN: 1061-4036 Impact factor: 38.330