T cell receptor Vβ repertoire of the antigen specific CD8 T lymphocyte subset of HIV infected children

Thomas W. McCloskey, Viraga Haridas, Rajendra Pahwa, Savita G Pahwa

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Objective: Analysis of the T cell receptor Vβ repertoire during HIV infection reveals expansions in multiple Vβ families of CD8 T cells, but their antigenic specificity is ill-defined. We sought to determine the TCR Vβ repertoire of HIV specific CD8 T lymphocytes in infected children. Design/methods: We performed flow cytometry to examine TCR Vβ families as identified by specific monoclonal antibodies and binding of HIV peptide loaded tetrameric MHC complexes in peripheral blood samples from a group of HIV infected children. Results: Simultaneous assessment of 12 selected expanded Vβ families amongst nine HIV infected patients for tetramer binding revealed only one child in whom the expanded Vβ population bound HIV Gag or Pol tetramers. In four HIV infected children, percentage tetramer binding cells was determined in 21 TCR Vβ families. The tetramer binding cells of three children exhibited a widely distributed TCR Vβ repertoire while in the fourth patient they were preferentially localized within two TCR Vβ families. Repeat analysis revealed that the TCR Vβ repertoire of tetramer binding cells was stable. Conclusions: These data provide evidence that the HIV-specific CD8 T cell response in children is usually distributed widely among many different TCR Vβ families. The heterogeneity of the TCR Vβ repertoire usage by the antigen specific CD8 T cells may reflect the dynamic interaction between host and pathogen during the course of HIV infection and may be influenced by the rate of viral mutation, CD4 T cell helper activity, or other factors.

Original languageEnglish
Pages (from-to)1459-1465
Number of pages7
JournalAIDS
Volume16
Issue number11
DOIs
StatePublished - Jul 26 2002
Externally publishedYes

Fingerprint

CD8 Antigens
T-Lymphocyte Subsets
T-Cell Antigen Receptor
HIV
T-Lymphocytes
HIV Infections
Host-Pathogen Interactions
Mutation Rate
Helper-Inducer T-Lymphocytes
Epitopes
Flow Cytometry
Monoclonal Antibodies
Peptides

Keywords

  • CD8
  • Cellular immunity
  • Flow cytometry
  • Pathogenesis
  • Pediatrics

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Cite this

T cell receptor Vβ repertoire of the antigen specific CD8 T lymphocyte subset of HIV infected children. / McCloskey, Thomas W.; Haridas, Viraga; Pahwa, Rajendra; Pahwa, Savita G.

In: AIDS, Vol. 16, No. 11, 26.07.2002, p. 1459-1465.

Research output: Contribution to journalArticle

McCloskey, Thomas W. ; Haridas, Viraga ; Pahwa, Rajendra ; Pahwa, Savita G. / T cell receptor Vβ repertoire of the antigen specific CD8 T lymphocyte subset of HIV infected children. In: AIDS. 2002 ; Vol. 16, No. 11. pp. 1459-1465.
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