HLA class II-Restricted CD8+ T cells in HIV-1 Virus Controllers

Sci Rep. 2019 Jul 15;9(1):10165. doi: 10.1038/s41598-019-46462-8.

Abstract

A paradigm shifting study demonstrated that induction of MHC class E and II-restricted CD8+ T cells was associated with the clearance of SIV infection in rhesus macaques. Another recent study highlighted the presence of HIV-1-specific class II-restricted CD8+ T cells in HIV-1 patients who naturally control infection (virus controllers; VCs). However, questions regarding class II-restricted CD8+ T cells ontogeny, distribution across different HIV-1 disease states and their role in viral control remain unclear. In this study, we investigated the distribution and anti-viral properties of HLA-DRB1*0701 and DQB1*0501 class II-restricted CD8+ T cells in different HIV-1 patient cohorts; and whether class II-restricted CD8+ T cells represent a unique T cell subset. We show that memory class II-restricted CD8+ T cell responses were more often detectable in VCs than in chronically infected patients, but not in healthy seronegative donors. We also demonstrate that VC CD8+ T cells inhibit virus replication in both a class I- and class II-dependent manner, and that in two VC patients the class II-restricted CD8+ T cells with an anti-viral gene signature expressed both CD4+ and CD8+ T cell lineage-specific genes. These data demonstrated that anti-viral memory class II-restricted CD8+ T cells with hybrid CD4+ and CD8+ features are present during natural HIV-1 infection.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • CD4-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / immunology
  • Female
  • HIV Infections / immunology*
  • HIV Infections / virology
  • HIV Seropositivity
  • HIV-1 / immunology
  • HIV-1 / metabolism
  • HLA-DQ beta-Chains / immunology*
  • HLA-DQ beta-Chains / metabolism
  • HLA-DRB1 Chains / immunology*
  • HLA-DRB1 Chains / metabolism
  • Histocompatibility Antigens Class II / immunology
  • Histocompatibility Antigens Class II / metabolism
  • Humans
  • Male
  • Viral Load
  • Virus Replication

Substances

  • HLA-DQ beta-Chains
  • HLA-DQB1 antigen
  • HLA-DRB1 Chains
  • Histocompatibility Antigens Class II