Multiple HLA-class I-specific inhibitory NK receptor expression and IL-4/IL-5 production by CD8+ T-cell clones in HIV-1 infection

Andrea De Maria, Domenico Mavilio, Paola Costa, Paola Dignetti, Manuela Fogli, M. Cristina Mingari

Research output: Contribution to journalArticle

Abstract

Several mechanisms may contribute to the decline in HIV-1 specific CD8+ cytotoxic T-lymphocyte (CTL) activity that is observed in infected patients, including loss of CD4+ cell help, antigenic shift, impaired clonogenicity and functional impairment due to expression of inhibitory NK receptors (iNKRs). In addition to a decrease in HIV-1-specific cytolytic activity, an increased proportion of CD8+ T-cells producing IL-4 and IL-5 has been recently observed in advanced HIV-1 infection. Remarkably, an impaired HIV-1-specific CTL activity was primarily detected among the TC0/Tc2 CD8+ CTLs. A series of CD3+CD8+ T-cell clones expressing inhibitory NK receptors (iNKRs) isolated from HIV-1 infected patients was analyzed in order to determine their cytokine production pattern and to assess the extent of iNKR expression at the single cell level. Our data indicate that iNKR+CD3+CD8+ clones isolated from infected patients frequently express multiple iNKR and may produce IL-4 and IL-5 to a relevant extent. Copyright (C) 2000 Elsevier Science B.V.

Original languageEnglish
Pages (from-to)179-182
Number of pages4
JournalImmunology Letters
Volume72
Issue number3
DOIs
Publication statusPublished - Jun 1 2000

Keywords

  • CD8+
  • HIV-1
  • IL-4
  • Inhibitory NK receptors
  • T-lymphocytes

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy

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