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Immunodeficiency, autoimmunity, and increased risk of B cell malignancy in humans with TRAF3 mutations

  • William Rae
  • , John M. Sowerby
  • , Dorit Verhoeven
  • , Mariam Youssef
  • , Prasanti Kotagiri
  • , Natalia Savinykh
  • , Eve L. Coomber
  • , Alexis Boneparth
  • , Angela Chan
  • , Chun Gong
  • , Machiel H. Jansen
  • , Romy du Long
  • , Giorgia Santilli
  • , Ilenia Simeoni
  • , Jonathan Stephens
  • , Kejia Wu
  • , Marta Zinicola
  • , Hana Lango Allen
  • , Helen Baxendale
  • , Dinakantha Kumararatne
  • Effrossyni Gkrania-Klotsas, Selma C. Scheffler Mendoza, Marco Antonio Yamazaki-Nakashimada, Laura Berrón Ruiz, Cesar Mauricio Rojas-Maruri, Saul O. Lugo Reyes, Paul A. Lyons, Anthony P. Williams, Daniel J. Hodson, Gail A. Bishop, Adrian J. Thrasher, David C. Thomas, Michael P. Murphy, Timothy J. Vyse, Joshua D. Milner, Taco W. Kuijpers, Kenneth G.C. Smith
  • Cambridge University Hospitals NHS Foundation Trust
  • Department of Medicine
  • Amsterdam Medical Center
  • AMC Academic Medical Center
  • Columbia University
  • University of Amsterdam
  • UCL Great Ormond Street Institute of Child Health
  • Royal Papworth Hospital NHS Foundation Trust
  • Cambridge University Hospital NHS Foundation Trust
  • National Institute of Pediatrics
  • University of Southampton
  • University of Iowa
  • Iowa City VA Health Care System
  • Great Ormond Street Hospital for Children NHS Foundation Trust
  • Imperial College London
  • MRC Mitochondrial Biology Unit

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

Tumor necrosis factor receptor–associated factor 3 (TRAF3) is a central regulator of immunity. TRAF3 is often somatically mutated in B cell malignancies, but its role in human immunity is not defined. Here, in five unrelated families, we describe an immune dysregulation syndrome of recurrent bacterial infections, autoimmunity, systemic inflammation, B cell lymphoproliferation, and hypergammaglobulinemia. Affected individuals each had monoallelic mutations in TRAF3 that reduced TRAF3 expression. Immunophenotyping showed that patients’ B cells were dysregulated, exhibiting increased nuclear factor-κB 2 activation, elevated mitochondrial respiration, and heightened inflammatory responses. Patients had mild CD4+ T cell lymphopenia, with a reduced proportion of naïve T cells but increased regulatory T cells and circulating T follicular helper cells. Guided by this clinical phenotype, targeted analyses demonstrated that common genetic variants, which also reduce TRAF3 expression, are associated with an increased risk of B cell malignancies, systemic lupus erythematosus, higher immunoglobulin levels, and bacterial infections in the wider population. Reduced TRAF3 conveys disease risks by driving B cell hyperactivity via intrinsic activation of multiple intracellular proinflammatory pathways and increased mitochondrial respiration, with a likely contribution from dysregulated T cell help. Thus, we define monogenic TRAF3 haploinsufficiency syndrome and demonstrate how common TRAF3 variants affect a range of human diseases.

Original languageEnglish
Article numbereabn3800
Pages (from-to)eabn3800
JournalScience Immunology
Volume7
Issue number74
DOIs
Publication statusPublished - 12 Aug 2022

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