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Synonymous GATA2 mutations result in selective loss of mutated RNA and are common in patients with GATA2 deficiency

  • European Working Group of MDS in Childhood (EWOG-MDS)
  • Albert-Ludwigs-Universität Freiburg
  • Max-Planck-Institut für Immunbiologie und Epigenetik
  • St. Jude Children Research Hospital
  • Deutsches Krebsforschungszentrum
  • Hokkaido University Graduate School of Medicine
  • Vilnius University
  • IRCCS Ospedale pediatrico Bambino Gesù - Roma
  • Medizinische Hochschule Hannover
  • Hospital Sant Joan de Déu
  • Aarhus University
  • Princess Máxima Centre
  • Central Hospital of Southern Pest
  • University of Bologna
  • Ghent University
  • University of Vienna
  • Universität Zürich
  • Our Lady's Hospital for Sick Children
  • Charles University
  • Wroclaw Medical University
  • University College London
  • Royal Free London NHS Foundation Trust
  • Newcastle upon Tyne Hospitals NHS Foundation Trust
  • La Sapienza University of Rome

Abstract

Deficiency of the transcription factor GATA2 is a highly penetrant genetic disorder predisposing to myelodysplastic syndromes (MDS) and immunodeficiency. It has been recognized as the most common cause underlying primary MDS in children. Triggered by the discovery of a recurrent synonymous GATA2 variant, we systematically investigated 911 patients with phenotype of pediatric MDS or cellular deficiencies for the presence of synonymous alterations in GATA2. In total, we identified nine individuals with five heterozygous synonymous mutations: c.351C>G, p.T117T (N = 4); c.649C>T, p.L217L; c.981G>A, p.G327G; c.1023C>T, p.A341A; and c.1416G>A, p.P472P (N = 2). They accounted for 8.2% (9/110) of cases with GATA2 deficiency in our cohort and resulted in selective loss of mutant RNA. While for the hotspot mutation (c.351C>G) a splicing error leading to RNA and protein reduction was identified, severe, likely late stage RNA loss without splicing disruption was found for other mutations. Finally, the synonymous mutations did not alter protein function or stability. In summary, synonymous GATA2 substitutions are a new common cause of GATA2 deficiency. These findings have broad implications for genetic counseling and pathogenic variant discovery in Mendelian disorders.

OriginalspracheEnglisch
ZeitschriftLeukemia
Jahrgang34
Ausgabenummer10
Seiten (von - bis)2673-2687
Seitenumfang15
ISSN0887-6924
DOIs
PublikationsstatusVeröffentlicht - 01.10.2020

Fördermittel

Acknowledgements This work was supported by grants from Fritz Thyssen Foundation 10.17.1.026MN (to MWW and ET); Deutsche Kinderkrebsstiftung DKS 2017.03, ERAPerMed by German Federal Ministry of Education and Research (BMBF) 2018-123/01KU1904, and Deutsche Krebshilfe 109005 (to MWW); José Carreras Leukemia Foundation (to VBP); Deutsche Forschungsgemeinschaft (DFG) 322977937/GRK2344 “MeInBio–BioInMe” (to ET and MB); Marie Curie Career Integration 631432 “Bloody Signals”, and DFG CIBSS-EXC-2189 390939984 (to ET), Baden-Württemberg LGFG stipend (to EJK), DFG EXC 22167-390884018 (to HB) and CRC850 (to MB), BMBF CoNfirm 01ZX1708F (to MB), and BMBF MyPred Network for young individuals with syndromes predisposing to myeloid malignancies (to MWW, ME, GG, CF, BS, and CMN). We are very grateful to Ayami-Yoshimi Nöllke, Lheanna Klaeyle, Sophie Krüger, Sandra Zolles, Christina Jäger, Sophia Hollander, Marco Teller, Ali-Riza Kaya, Alexandra Fischer, Wilfried Truckenmüller, Peter Nöllke, and Anne Strauss (Freiburg) for excellent assistance in diagnostic workup, laboratory work, and data management, and Prof. Dr. Rudolf Grosschedl (Max Planck Institute Freiburg), Dr. Claudia Wehr, and Dr. Ulrich Salzer (Freiburg) for helpful discussions. The authors also thank all members of the European Working Group of MDS in Childhood (EWOG-MDS) for performing reference examinations (pathology, cytogenetics, molecular genetics), HSCT or other forms of patient care. This work was performed within the European Reference Network for Paediatric Cancer (ERN-PAEDCAN). The authors acknowledge the contribution of the Center of Inborn and Acquired Blood Diseases at the Freiburg Center for Rare Diseases, and the Hilda Biobank at the Department of Pediatrics and Adolescent Medicine, Freiburg, Germany.

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  1. SDG 3 – Gesundheit und Wohlergehen
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Strategische Forschungsbereiche und Zentren

  • Forschungsschwerpunkt: Infektion und Entzündung - Zentrum für Infektions- und Entzündungsforschung Lübeck (ZIEL)

DFG-Fachsystematik

  • 2.21-05 Immunologie

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