Patterns of cytokine production in human immunodeficiency virus type 1 (HIV-1)-specific human CD8+ T cells after stimulation with HIV-1-infected CD4+ T cells

Mamoru Fujiwara, Hiroshi Takata, Shinichi Oka, Hiroko Tomiyama, Masafumi Takiguchi

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Although human immunodeficiency virus type 1 (HIV-1)-specific CD8 + T cells can produce various cytokines that suppress HIV-1 replication or modulate anti-HIV-1 immunity, the extent to which HIV-1-specific CD8+ T cells produce cytokines when they recognize HIV-1-infected CD4+ T cells in vivo still remains unclear. We first analyzed the abilities of 10 cytotoxic T-lymphocyte (CTL) clones specific for three HIV-1 epitopes to produce gamma interferon, macrophage inflammatory protein 1β, and tumor necrosis factor alpha after stimulation with epitope peptide-pulsed cells. These CTL clones produced these cytokines in various combinations within the same specificity and among the different specificities, suggesting a functional heterogeneity of HIV-1-specific effector CD8+ T cells in cytokine production. In contrast, the HIV-1-specific CTL clones for the most part produced a single cytokine, without heterogeneity of cytokine production among the clones, after stimulation with HIV-1-infected CD4+ T cells. The loss of heterogeneity in cytokine production may be explained by low surface expression of HLA class I-epitope peptide complexes. Freshly isolated HIV-1-specific CD8+ T cells with an effector/memory or memory phenotype produced much more of the cytokines than the same epitope-specific CTL clones when stimulated with HIV-1-infecied CD4+ T cells. Cytokine production from HIV-1-specific memory/effector and memory CD8+ T cells might be a critical event in the eradication of HIV-1 in HIV-1-infected individuals.

Original languageEnglish (US)
Pages (from-to)12536-12543
Number of pages8
JournalJournal of virology
Volume79
Issue number19
DOIs
StatePublished - Oct 2005
Externally publishedYes

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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