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© Research
Publication : Journal of immunology (Baltimore, Md. : 1950)

Defective dendritic cell function in HIV-infected patients receiving effective highly active antiretroviral therapy: neutralization of IL-10 production and depletion of CD4+CD25+ T cells restore high levels of HIV-specific CD4+ T cell responses induced by dendritic cells generated in the presence of IFN-alpha

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Journal of immunology (Baltimore, Md. : 1950) - 15 Jun 2004

Carbonneil C, Donkova-Petrini V, Aouba A, Weiss L

Link to Pubmed [PMID] – 15187167

J. Immunol. 2004 Jun;172(12):7832-40

We previously demonstrated that GM-CSF/IFN-alpha combination allowed the differentiation of monocytes from HIV-infected patients into dendritic cells (DCs) exhibiting high CD8(+) T cell stimulating abilities. The present study was aimed at characterizing the ability of DCs generated in the presence of GM-CSF and IFN-alpha to induce CD4 T cell responses. DCs were generated from monocytes of HIV-infected patients in the presence of GM-CSF with either IFN-alpha (IFN-DCs) or IL-4 (IL-4-DCs) for 7 days. Eleven patients receiving highly active antiretroviral therapy and exhibiting CD4 cell counts above 400/mm(3) and plasma HIV-RNA <50 copies/ml for at least 1 year were included in the study. Both DC populations were found to be defective in inducing autologous (in response to tuberculin or HIV-p24) or allogeneic CD4 T cell proliferation. Neutralization of IL-10 during the differentiation of IFN-DCs, but not during the DC-T cell coculture, significantly increased their ability to stimulate autologous CD4 T cell proliferation in response to tuberculin and allogeneic CD4 T cell proliferation (4.1-fold and 3.0-fold increases, respectively, at the DC to T cell ratio of 1:10). Moreover, IL-10 neutralization and CD4(+)CD25(+) T cell depletion synergistically act to dramatically increase HIV-p24-specific CD4 T cell responses induced by IFN-DCs (31.7-fold increase) but not responses induced by IL-4-DCs. Taken together, our results indicate that IFN-DCs are more efficient than IL-4-DCs to stimulate CD4(+) T cell proliferation, further supporting their use for immune-based therapy in HIV infection.

http://www.ncbi.nlm.nih.gov/pubmed/15187167