Haematologica (Aug 2016)

Different spectra of recurrent gene mutations in subsets of chronic lymphocytic leukemia harboring stereotyped B-cell receptors

  • Lesley-Ann Sutton,
  • Emma Young,
  • Panagiotis Baliakas,
  • Anastasia Hadzidimitriou,
  • Theodoros Moysiadis,
  • Karla Plevova,
  • Davide Rossi,
  • Jana Kminkova,
  • Evangelia Stalika,
  • Lone Bredo Pedersen,
  • Jitka Malcikova,
  • Andreas Agathangelidis,
  • Zadie Davis,
  • Larry Mansouri,
  • Lydia Scarfò,
  • Myriam Boudjoghra,
  • Alba Navarro,
  • Alice F. Muggen,
  • Xiao-Jie Yan,
  • Florence Nguyen-Khac,
  • Marta Larrayoz,
  • Panagiotis Panagiotidis,
  • Nicholas Chiorazzi,
  • Carsten Utoft Niemann,
  • Chrysoula Belessi,
  • Elias Campo,
  • Jonathan C. Strefford,
  • Anton W. Langerak,
  • David Oscier,
  • Gianluca Gaidano,
  • Sarka Pospisilova,
  • Frederic Davi,
  • Paolo Ghia,
  • Kostas Stamatopoulos,
  • Richard Rosenquist

DOI
https://doi.org/10.3324/haematol.2016.141812
Journal volume & issue
Vol. 101, no. 8

Abstract

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We report on markedly different frequencies of genetic lesions within subsets of chronic lymphocytic leukemia patients carrying mutated or unmutated stereotyped B-cell receptor immunoglobulins in the largest cohort (n=565) studied for this purpose. By combining data on recurrent gene mutations (BIRC3, MYD88, NOTCH1, SF3B1 and TP53) and cytogenetic aberrations, we reveal a subset-biased acquisition of gene mutations. More specifically, the frequency of NOTCH1 mutations was found to be enriched in subsets expressing unmutated immunoglobulin genes, i.e. #1, #6, #8 and #59 (22–34%), often in association with trisomy 12, and was significantly different (P