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. 1993 Dec;94(3):486–489.

The expansion of CD8 lymphocytes using T cell receptor variable gene products during HIV infection.

P De Paoli 1, C Caffau 1, M D'Andrea 1, P Ceolin 1, C Simonelli 1, U Tirelli 1, G Santini 1
PMCID: PMC1534445  PMID: 7902788

Abstract

Fresh peripheral blood was obtained from HIV-infected subjects and from age-matched healthy controls. Single-, two- and three-colour flow cytometry was performed using FITC-labelled MoAbs directed against the following TCR V beta subfamilies: V2, V3, V5a, V5b, V5c, V6, V8, V12, V13.3, V17, V19, alone or in combination with PE-labelled CD4, CD8, HLA-DR, CD28, CD38 and with Peridinin-chlorophyll A protein (PerCP)-conjugated CD8. The percentages of each V beta subfamily did not differ in HIV+ patients compared with healthy controls. However, we were able to find in four patients (one CDC group II, one group III and two group IV) an expansion of a TCR V beta subfamily (V3 in two, V5a and V19 in one patient). These cells were mainly CD8+. Three-colour flow cytometry allowed us to define that the expanded V beta+, CD8+ T lymphocytes were characterized by the low/intermediate expression of activation markers (HLA-DR, CD28, CD38). In some HIV+ patients there is an expansion of T cells expressing a TCR V beta subfamily; the nature of this expansion may be related to factors that are still unknown, such as the genetic background of each individual and the antigenic specificity of T cells. These populations may be relevant in the host response to the virus and in disease progression.

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Selected References

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