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Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
09:02

Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation

Published on: November 26, 2018

Thymic function and immunoglobulin mutation genotype in B-cell chronic lymphocytic leukemia patients

Elena Nardini1, Francesca Neri, Elisa Vicenzi

  • 1Department of Experimental Oncology, Molecular Targeting Unit, National Cancer Institute, Via Venezian 1, 20133 Milan, Italy.

International Journal of Cancer
|November 6, 2003
PubMed

Insights

Signal joint T-cell receptor excision circles (sjTRECs) are decreased in most B-cell chronic lymphocytic leukemia (B-CLL) patients, suggesting thymus dysfunction contributes to immune system dysregulation in B-CLL.

Area of Science:

  • Immunology
  • Hematology
  • Oncology

Background:

  • B-cell chronic lymphocytic leukemia (B-CLL) involves significant immune system dysregulation.
  • The role of thymus function in B-CLL immune dysfunction requires further investigation.

Purpose of the Study:

  • To investigate thymus dysfunction in B-CLL by quantifying signal joint T-cell receptor excision circles (sjTRECs).
  • To explore the relationship between sjTREC levels, somatic hypermutation (SHM) status, and clinical progression in B-CLL patients.

Main Methods:

  • Quantification of sjTRECs in peripheral blood mononuclear cells from 30 untreated B-CLL patients and age-matched controls.
  • Analysis of sjTREC levels in relation to V(H) gene somatic hypermutation (SHM) status.
  • Clinical follow-up over 5 years for 16 patients to assess disease progression.

Main Results:

  • sjTRECs were decreased in 19/30 B-CLL patients compared to controls.
  • Lower sjTREC levels were more frequent in B-CLL patients lacking SHMs.
  • Patients with low sjTREC levels showed a trend towards faster disease progression.

Conclusions:

  • Over 60% of B-CLL patients exhibit decreased sjTREC levels.
  • Thymus dysfunction may contribute to the immune deficits observed in B-CLL.
  • sjTREC levels may serve as a potential indicator of immune status and prognosis in B-CLL.

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