Leukocyte immunoglobulin-like receptors maintain unique antigen-presenting properties of circulating myeloid dendritic cells in HIV-1-infected elite controllers

J Virol. 2010 Sep;84(18):9463-71. doi: 10.1128/JVI.01009-10. Epub 2010 Jul 14.

Abstract

Elite controllers maintain undetectable levels of HIV-1 replication in the absence of antiretroviral therapy, but the correlates of immune protection in this patient population are ill defined. Here, we demonstrate that in comparison to patients with progressive HIV-1 infection or healthy persons not infected with HIV-1, elite controllers have circulating myeloid dendritic cells with significantly increased antigen-presenting properties, while their ability to secrete proinflammatory cytokines is substantially diminished. This unique functional profile is associated with a distinct surface expression pattern of immunomodulatory leukocyte-immunoglobulin-like receptors (LILR) and a strong and selective upregulation of LILRB1 and LILRB3. Blockade of these two receptors by monoclonal antibodies or short interfering RNA (siRNA) abrogated the specific antigen-presenting properties of dendritic cells, implying an important regulatory role of these molecules. These data reveal previously unrecognized innate components of immune protection against HIV-1 in elite controllers and offer novel perspectives for the manipulation of host immunity for the prevention and treatment of HIV-1 infection.

Publication types

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

MeSH terms

  • Adult
  • Antibodies, Monoclonal / immunology
  • Antigen Presentation*
  • Antigens, CD / immunology
  • Antigens, CD / metabolism*
  • Cytokines / metabolism
  • Dendritic Cells / immunology*
  • Female
  • Gene Silencing
  • HIV Infections / immunology*
  • HIV Long-Term Survivors*
  • HIV-1 / immunology*
  • Humans
  • Leukocyte Immunoglobulin-like Receptor B1
  • Male
  • Middle Aged
  • Receptors, Immunologic / antagonists & inhibitors
  • Receptors, Immunologic / immunology
  • Receptors, Immunologic / metabolism*
  • Young Adult

Substances

  • Antibodies, Monoclonal
  • Antigens, CD
  • Cytokines
  • LILRB1 protein, human
  • LILRB3 protein, human
  • Leukocyte Immunoglobulin-like Receptor B1
  • Receptors, Immunologic