Frontiers in Oncology (Mar 2024)

CD20+ T cells in monoclonal B cell lymphocytosis and chronic lymphocytic leukemia: frequency, phenotype and association with disease progression

  • Cristiana Rodrigues,
  • Cristiana Rodrigues,
  • Paula Laranjeira,
  • Paula Laranjeira,
  • Paula Laranjeira,
  • Paula Laranjeira,
  • Paula Laranjeira,
  • Aryane Pinho,
  • Aryane Pinho,
  • Aryane Pinho,
  • Isabel Silva,
  • Sandra Silva,
  • Margarida Coucelo,
  • Ana Catarina Oliveira,
  • Ana Teresa Simões,
  • Inês Damásio,
  • Helena Matos Silva,
  • Mafalda Urbano,
  • Ana Bela Sarmento-Ribeiro,
  • Ana Bela Sarmento-Ribeiro,
  • Ana Bela Sarmento-Ribeiro,
  • Ana Bela Sarmento-Ribeiro,
  • Ana Bela Sarmento-Ribeiro,
  • Catarina Geraldes,
  • Catarina Geraldes,
  • Catarina Geraldes,
  • Catarina Geraldes,
  • Catarina Geraldes,
  • M. Rosário Domingues,
  • M. Rosário Domingues,
  • Julia Almeida,
  • Julia Almeida,
  • Julia Almeida,
  • Julia Almeida,
  • Ignacio Criado,
  • Ignacio Criado,
  • Ignacio Criado,
  • Ignacio Criado,
  • Alberto Orfao,
  • Alberto Orfao,
  • Alberto Orfao,
  • Alberto Orfao,
  • Artur Paiva,
  • Artur Paiva,
  • Artur Paiva,
  • Artur Paiva,
  • Artur Paiva

DOI
https://doi.org/10.3389/fonc.2024.1380648
Journal volume & issue
Vol. 14

Abstract

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IntroductionIn monoclonal B cell lymphocytosis (MBL) and chronic lymphocytic leukemia (CLL), the expansion of malignant B cells disrupts the normal homeostasis and interactions between B cells and T cells, leading to immune dysregulation. CD20+ T cells are a subpopulation of T cells that appear to be involved in autoimmune diseases and cancer.MethodsHere, we quantified and phenotypically characterized CD20+ T cells from MBL subjects and CLL patients using flow cytometry and correlated our findings with the B-cell receptor mutational status and other features of the disease. Results and discussionCD20+ T cells were more represented within the CD8+ T cell compartment and they showed a predominant memory Tc1 phenotype. CD20+ T cells were less represented in MBL and CLL patients vs healthy controls, particularly among those with unmutated IGVH gene. The expansion of malignant B cells was accompanied by phenotypic and functional changes in CD20+ T cells, including an increase in follicular helper CD4+ CD20+ T cells and CD20+ Tc1 cells, in addition to the expansion of the TCR Vβ 5.1 in CD4+ CD20+ T cells in CLL.

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