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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.

Authors :
Fujiwara M
Takata H
Oka S
Tomiyama H
Takiguchi M
Source :
Journal of virology [J Virol] 2005 Oct; Vol. 79 (19), pp. 12536-43.
Publication Year :
2005

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 1beta, 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-infected 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.

Details

Language :
English
ISSN :
0022-538X
Volume :
79
Issue :
19
Database :
MEDLINE
Journal :
Journal of virology
Publication Type :
Academic Journal
Accession number :
16160181
Full Text :
https://doi.org/10.1128/JVI.79.19.12536-12543.2005