1. High proportion of PD-1-expressing CD4 + T cells in adipose tissue constitutes an immunomodulatory microenvironment that may support HIV persistence.
- Author
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Damouche A, Pourcher G, Pourcher V, Benoist S, Busson E, Lataillade JJ, Le Van M, Lazure T, Adam J, Favier B, Vaslin B, Müller-Trutwin M, Lambotte O, and Bourgeois C
- Subjects
- Adipose Tissue metabolism, Adipose Tissue virology, Adult, Aged, Aged, 80 and over, Antiviral Agents therapeutic use, CD4-Positive T-Lymphocytes metabolism, CD4-Positive T-Lymphocytes virology, Disease Reservoirs virology, Female, Flow Cytometry, HIV Infections metabolism, HIV Infections virology, HIV-1 drug effects, Host-Pathogen Interactions immunology, Humans, Male, Middle Aged, Programmed Cell Death 1 Receptor metabolism, Adipose Tissue immunology, CD4-Positive T-Lymphocytes immunology, Cellular Microenvironment immunology, HIV Infections immunology, HIV-1 immunology, Programmed Cell Death 1 Receptor immunology
- Abstract
We and others have demonstrated that adipose tissue is a reservoir for HIV. Evaluation of the mechanisms responsible for viral persistence may lead to ways of reducing these reservoirs. Here, we evaluated the immune characteristics of adipose tissue in HIV-infected patients receiving antiretroviral therapy (ART) and in non-HIV-infected patients. We notably sought to determine whether adipose tissue's intrinsic properties and/or HIV induced alteration of the tissue environment may favour viral persistence. ART-controlled HIV infection was associated with a difference in the CD4/CD8 T-cell ratio and an elevated proportion of Treg cells in subcutaneous adipose tissue. No changes in Th1, Th2 and Th17 cell proportions or activation markers expression on T cell (Ki-67, HLA-DR) could be detected, and the percentage of CD69-expressing resident memory CD4
+ T cells was not affected. Overall, our results indicate that adipose-tissue-resident CD4+ T cells are not extensively activated during HIV infection. PD-1 was expressed by a high proportion of tissue-resident memory CD4+ T cells in both HIV-infected patients and non-HIV-infected patients. Our findings suggest that adipose tissue's intrinsic immunomodulatory properties may limit immune activation and thus may strongly contribute to viral persistence., (© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)- Published
- 2017
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