Recurrent somatic mutations of PTPN1 in primary mediastinal B cell lymphoma and Hodgkin lymphoma

  • Jay Gunawardana
  • , Fong Chun Chan
  • , Adèle Telenius
  • , Bruce Woolcock
  • , Robert Kridel
  • , King L. Tan
  • , Susana Ben-Neriah
  • , Anja Mottok
  • , Raymond S. Lim
  • , Merrill Boyle
  • , Sanja Rogic
  • , Lisa M. Rimsza
  • , Chrystelle Guiter
  • , Karen Leroy
  • , Philippe Gaulard
  • , Corinne Haioun
  • , Marco A. Marra
  • , Kerry J. Savage
  • , Joseph M. Connors
  • , Sohrab P. Shah
  • Randy D. Gascoyne, Christian Steidl

Research output: Contribution to journalArticlepeer-review

178 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)329-335
Number of pages7
JournalNature Genetics
Volume46
Issue number4
DOIs
StatePublished - Apr 2014
Externally publishedYes

ASJC Scopus subject areas

  • Genetics

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