An imbalance of naive and memory/effector subsets and altered expression of CD38 on T lymphocytes in two girls with hyper-IgM syndrome

An imbalance of naive and memory/effector subsets and altered expression of CD38 on T lymphocytes in two girls with hyper-IgM syndrome

Autor Costa-Carvalho, Beatriz Tavares Autor UNIFESP Google Scholar
Viana, M. A. Google Scholar
Brunialti, Milena Karina Coló Autor UNIFESP Google Scholar
Kallas, Esper Georges Autor UNIFESP Google Scholar
Salomão, Reinaldo Autor UNIFESP Google Scholar
Instituição Universidade Federal de São Paulo (UNIFESP)
Resumo In this report we evaluated CD4(+) T, CD8(+) T and natural killer (NK) cell counts, the levels of naive/memory subsets within the CD4(+) T lymphocyte population, expression of CD38 on T lymphocytes, and CD4(+) and CD8(+) T cell cytokine production in two girls with hyper-IgM (HIM) syndrome. Both girls developed recurrent infections early in infancy, presenting a wide spectrum of clinical manifestations, with a strikingly different disease severity between them. CD4(+) T cell counts were low in both children (patient 1: 214 cells/mm(3) and patient 2: 392 cells/mm(3)), and the CD4/CD8 T cell ratio was 0.4 for patient 1, the patient with the more severe disease, and 1.4 for patient 2. NK cell numbers were low in patient 1 (60 cells/mm(3)) and borderline (286 cells/mm(3)) with regard to normal levels in patient 2. An imbalance of naive and memory/effector cell subsets was found in both girls, with the percentage of CD45RA(+) 27(+) (naive) CD4(+) T lymphocytes being 5.8 and 12.4 for patients 1 and 2, respectively. Expression of CD38 on the surface of T lymphocytes was low in patient 1. Detection of intracellular interferon (IFN)-gamma and tumour necrosis factor (TNF)-alpha in CD4(+) and CD8(+) T lymphocytes upon PMA-Io stimulus was preserved in both children. in conclusion, we found low numbers of CD4(+) T lymphocytes and a dramatic redistribution of naive and memory/effector CD4(+) T lymphocytes in two girls with non-X-linked HIM syndrome. Furthermore, we found low expression of CD38 on T lymphocytes and low numbers of NK cells in the patient with the more severe disease, indicating a possible role for these cells in the pathogenesis of this immunodeficiency.
Assunto CD38
cytokines
hyper-IgM
naive/memory cells
T lymphocytes
Idioma Inglês
Data 2004-05-01
Publicado em Clinical and Experimental Immunology. Oxford: Blackwell Publishing Ltd, v. 136, n. 2, p. 291-296, 2004.
ISSN 0009-9104 (Sherpa/Romeo, fator de impacto)
Editor Blackwell Publishing Ltd
Extensão 291-296
Fonte http://dx.doi.org/10.1111/j.1365-2249.2004.02446.x
Direito de acesso Acesso aberto Open Access
Tipo Artigo
Web of Science WOS:000220736600015
URI http://repositorio.unifesp.br/handle/11600/27719

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