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Changes of T-lymphocyte-subsets and their consequences in B-CLL
T Burger1, L Molnár, M Schmelczer
12nd Department of Internal Medicine, Medical University of Pécs, Hungary.
Folia Haematologica (Leipzig, Germany : 1928)
|January 1, 1990
Summary
In lymphocytic leukaemia, T-lymphocyte subsets show significant imbalance, with decreased CD4 and increased CD8 cells, indicating immune dysfunction. Treatment with Leukeran and COP did not alter pathological cells but reduced lymphocyte counts.
Area of Science:
- Immunology
- Hematology
- Oncology
Background:
- Lymphocytic leukaemia is characterized by abnormal lymphocyte proliferation.
- T-lymphocyte subsets play a crucial role in immune regulation.
- Understanding T-cell dynamics is vital for assessing disease severity and treatment efficacy.
Purpose of the Study:
- To investigate the distribution of T-lymphocyte subsets in patients with lymphocytic leukaemia.
- To correlate T-lymphocyte subset changes with disease staging (RAI classification).
- To evaluate the impact of short-term chemotherapy on T-lymphocyte profiles.
Main Methods:
- Analysis of T-lymphocyte subsets using monoclonal antibodies.
- Assessment of E-rosette and EAC-rosette formation.
- Classification of patients based on RAI staging (0-II and III-IV).
- Monitoring changes after four weeks of Leukeran and COP treatment.
Main Results:
- A proportional decrease in T-lymphocytes was observed, despite an absolute increase.
- The ratio of CD4+ to CD8+ lymphocytes was significantly reduced, particularly in advanced stages (III-IV).
- Chemotherapy (Leukeran and COP) led to a decrease in lymphocyte count without changing pathological cell rates.
- Immune imbalance, indicated by altered T-cell ratios, correlates with increased susceptibility to infections.
Conclusions:
- Lymphocytic leukaemia is associated with profound immune imbalance due to altered T-helper and T-suppressor cell functions.
- The observed clonal damage suggests a need for prolonged cytostatic therapy for effective treatment.
- Early detection and management of immune dysfunction are critical in lymphocytic leukaemia management.