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Human immunodeficiency virus type 1 (HIV-1)-specific CD4+ T cells that proliferate in vitro detected in samples from most viremic subjects and inversely associated with plasma HIV-1 levels.

Abstract：

:Diminished in vitro proliferation of human immunodeficiency virus type 1 (HIV-1)-specific CD4+T cells has been associated with HIV-1 viremia and declining CD4+ T-cell counts during chronic infection. To better understand this phenomenon, we examined whether HIV-1 Gag p24 antigen-induced CD4+ T-cell proliferation might recover in vitro in a group of subjects with chronic HIV-1 viremia and no history of antiretroviral therapy (ART). We found that depletion of CD8+ cells from peripheral blood mononuclear cells (PBMC) before antigen stimulation was associated with a 6.5-fold increase in the median p24-induced CD4+ T-cell proliferative response and a 57% increase in the number of subjects with positive responses. These p24-induced CD4+ T-cell proliferative responses from CD8-depleted PBMC were associated with expansion of the numbers of p24-specific, gamma interferon (IFN-gamma)-producing CD4+ T cells. Among the 20 viremic, treatment-naive subjects studied, the only 5 subjects lacking proliferation-competent, p24-specific CD4+ T-cell responses from CD8-depleted PBMC showed plasma HIV-1 RNA levels > 100,000 copies/ml. Furthermore, both the magnitude of p24-induced CD4+ T-cell proliferative responses from CD8-depleted PBMC and the frequency of p24-specific, IFN-gamma-producing CD4+ T cells expanded from CD8-depleted PBMC were associated inversely with plasma HIV-1 RNA levels. Therefore, proliferation-competent, HIV-1-specific CD4+ T cells that might help control HIV-1 disease may persist during chronic, progressive HIV-1 disease except at very high levels of in vivo HIV-1 replication.

journal_name

J Virol

journal_title

Journal of virology

authors

Boritz E,Palmer BE,Wilson CC

doi

10.1128/JVI.78.22.12638-12646.2004

subject

Has Abstract

pub_date

2004-11-01 00:00:00

pages

12638-46

issue

22

eissn

0022-538X

issn

1098-5514

pii

78/22/12638

journal_volume

78

pub_type

杂志文章

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