4 years ago

High proportion of PD-1-expressing CD4+ T cells in adipose tissue constitutes an immunomodulatory microenvironment that may support HIV persistence

High proportion of PD-1-expressing CD4+ T cells in adipose tissue constitutes an immunomodulatory microenvironment that may support HIV persistence
Benoit Favier, Stéphane Benoist, Olivier Lambotte, Jean-Jacques Lataillade, Elodie Busson, Thierry Lazure, Guillaume Pourcher, Michaela Müller-Trutwin, Bruno Vaslin, Abderaouf Damouche, Mélanie Van, Valérie Pourcher, Christine Bourgeois, Julien Adam
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. Adipose tissue CD4 T cells exhibit a tissue-specific profile defined by high expression of PD-1. The functional relevance of such high PD-1 expression on adipose CD4 T cells remains unclear but it may favor HIV persistence since PD1 expressing CD4 T cells has been described as a preferential HIV reservoir.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/eji.201747060

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.