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© Research
Publication : AIDS research and human retroviruses

Systemic immune activation in HIV-1-exposed uninfected Vietnamese intravascular drug users

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in AIDS research and human retroviruses - 01 Mar 2006

Tran HK, Chartier L, Troung LX, Nguyen NN, Fontanet A, Barré-Sinoussi FE, Pancino G, Scott-Algara D

Link to Pubmed [PMID] – 16545012

AIDS Res. Hum. Retroviruses 2006 Mar;22(3):255-61

To assess immunological parameters, including markers of immune activation, in highly HIV-1-exposed uninfected (EU) Vietnamese intravascular drug users (IDUs) in comparison with HIV-1-infected IDUs and HIVunexposed controls, we determined peripheral lymphocyte phenotypes in fresh whole blood samples from 32 EU IDUs, 28 HIV+ IDUs, and 26 blood donors. We found higher levels of activation markers (CD38, HLADR) on CD4+ and CD8+ T cells, lower percentages of naive CD4+ and CD8+ T cells, higher percentages of CD8+ T cells and of CD8+ T cells expressing CD25, and lower levels of CXCR4+CD4+ T cells in EU IDUs than in unexposed controls. Despite several differences in CD4+ and CD8+ T cell subset phenotypes, both EU and HIV+ IDUs exhibited a pattern of peripheral immune activation. Lymphocyte activation in EU IDUs may reflect immune stimulation driven by viral infections other than HIV-1 and/or allogeneic stimulation associated with needle sharing. Our results suggest that immune activation does not necessarily favor HIV-1 transmission, but, on the contrary, may alter the susceptibility of EUs to HIV-1 infection and contribute to their resistance.