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Clinical and Experimental Immunology logoLink to Clinical and Experimental Immunology
. 1991 Feb;83(2):187–191. doi: 10.1111/j.1365-2249.1991.tb05612.x

A subset of gamma delta lymphocytes is increased during HIV-1 infection.

P De Paoli 1, D Gennari 1, P Martelli 1, G Basaglia 1, M Crovatto 1, S Battistin 1, G Santini 1
PMCID: PMC1535251  PMID: 1825186

Abstract

The gamma delta T cell receptor (TcR) lymphocytes constitute 3-10% of human peripheral blood lymphocytes. Only a very small fraction of these cells is recognized by the delta TCS1 monoclonal antibody, directed against the V delta 1 chain of the receptor. We describe the immunological, virological and clinical data of a small group of seropositive subjects having high levels of gamma delta TcR T cells in the peripheral blood. Our flow cytometric studies show that most of these cells belong to the delta TCS1+ (V delta 1+), CD8 +/- (dim staining) subset. Patients with high gamma delta TcR T cell numbers were not characterized by the presence of an acute (IgM positive) or reactivated (as defined by high IgG titres against early antigen or IgA titres against viral capsidic antigen) Epstein-Barr virus infection. Cytomegalovirus infection was excluded by serological assays, and other herpes viral infections were not found after clinical examination. HIV p24 antigenaemia was present in two out of 11 subjects. AIDS patients had very high percentages of gamma delta TcR T cells. Altogether these data show that the selective expansion of delta TCS1+ cells in HIV1 seropositive subjects is not related to some exogenous antigen stimulation, but may be related to peculiar pathologic processes involving the immune system.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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