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Clinical and laboratory aspects of common variable immunodeficiency
Cristina M Kokron1, Paolo R Errante, Myrthes T Barros
1Serviço de Imunologia, Av. Dr. Anéas de Carvalho Aguilar, 155, 8 andar, bloco 3, 05403-010 São Paulo, SP, Brazil.
Anais Da Academia Brasileira De Ciencias
|November 24, 2004
Summary
Common variable immunodeficiency (CVID) impairs antibody production, leading to infections. Brazilian CVID patients exhibit reduced T and B cells, increased lymphocyte apoptosis, and lower activation molecule expression, impacting cellular immunity.
Area of Science:
- Immunology
- Clinical Medicine
Background:
- Common variable immunodeficiency (CVID) is a primary immunodeficiency characterized by impaired antibody production, recurrent infections, autoimmune disorders, and increased cancer risk.
- CVID can involve cellular immune disturbances, including altered lymphocyte counts, reduced proliferation, cytokine dysregulation, and deficient cell-surface molecule expression.
Purpose of the Study:
- To investigate immunological disturbances in Brazilian CVID patients.
- To correlate these immunological findings with clinical features and compare them with existing literature.
Main Methods:
- Analysis of T and B lymphocyte counts in peripheral blood.
- Assessment of lymphocyte apoptosis susceptibility following activation.
- Evaluation of activation molecule expression (CD25, CD69, CD40L, CD70).
- Measurement of cytokine synthesis (IL-4, IL-5).
Main Results:
- Brazilian CVID patients showed decreased T and B lymphocyte counts.
- Lymphocytes from CVID patients were more susceptible to apoptosis after activation.
- Reduced expression of activation molecules (CD25, CD69, CD40L, CD70) was observed.
- Decreased synthesis of IL-4 and IL-5 was noted in CVID patients compared to controls.
Conclusions:
- Increased lymphocyte apoptosis following activation may explain reduced activation molecule expression, decreased Th2 cytokine synthesis, and lower circulating T and B cell counts in these CVID patients.
- These immunological findings contribute to understanding the pathophysiology of CVID and its clinical manifestations.