Haematologica (Aug 2019)

DNMT3A mutation is associated with increased age and adverse outcome in adult T-cell acute lymphoblastic leukemia

  • Jonathan Bond,
  • Aurore Touzart,
  • Stéphane Leprêtre,
  • Carlos Graux,
  • Mario Bargetzi,
  • Ludovic Lhermitte,
  • Guillaume Hypolite,
  • Thibaut Leguay,
  • Yosr Hicheri,
  • Gaëlle Guillerm,
  • Karin Bilger,
  • Véronique Lhéritier,
  • Mathilde Hunault,
  • Françoise Huguet,
  • Yves Chalandon,
  • Norbert Ifrah,
  • Elizabeth Macintyre,
  • Hervé Dombret,
  • Vahid Asnafi,
  • Nicolas Boissel

DOI
https://doi.org/10.3324/haematol.2018.197848
Journal volume & issue
Vol. 104, no. 8

Abstract

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The prognostic implications of DNMT3A genotype in T-cell acute lymphoblastic leukemia are incompletely understood. We performed comprehensive genetic and clinico-biological analyses of T-cell acute lymphoblastic leukemia patients with DNMT3A mutations treated during the GRAALL-2003 and -2005 studies. Eighteen of 198 cases (9.1%) had DNMT3A alterations. Two patients also had DNMT3A mutations in non-leukemic cell DNA, providing the first potential evidence of age-related clonal hematopoiesis in T-cell acute lymphoblastic leukemia. DNMT3A mutation was associated with older age (median 43.9 years vs. 29.4 years, P