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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.
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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