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Assessing the Innate Sensing of HIV-1 Infected CD4+ T Cells by Plasmacytoid Dendritic Cells Using an Ex vivo Co-culture System.
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CD4 responses against IDO.

Mads Hald Andersen1

  • 1Center for Cancer Immune Therapy (CCIT); Department of Hematology; Copenhagen University Hospital; Herlev, Denmark.

Oncoimmunology
|November 22, 2012
PubMed
Summary
This summary is machine-generated.

Natural indoleamine-2,3-dioxygenase (IDO)-reactive CD4(+) T cells can release inflammatory cytokines and sometimes suppress IL-10. These IDO-specific T cells may delay IDO

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Published on: October 15, 2013

Area of Science:

  • Immunology
  • T cell biology
  • Cancer immunology

Background:

  • Indoleamine-2,3-dioxygenase (IDO) is an enzyme with immunosuppressive properties.
  • IDO-reactive CD4(+) T cells are found in peripheral blood lymphocytes.
  • The role of these T cells in immune regulation is not fully understood.

Purpose of the Study:

  • To investigate the functional characteristics of natural indoleamine-2,3-dioxygenase (IDO)-reactive CD4(+) T cells.
  • To determine the potential immunoregulatory roles of these T cells.

Main Methods:

  • Analysis of cytokine production (IFNγ, TNFα, IL-17, IL-10) by IDO-reactive CD4(+) T cells.
  • Assessment of the regulatory phenotype and function of these T cells in peripheral blood lymphocytes.

Main Results:

  • IDO-reactive CD4(+) T cells were found to release interferon-γ (IFNγ), tumor necrosis factor-α (TNFα), and interleukin-17 (IL-17).
  • In some individuals, these cells also suppressed the production of interleukin-10 (IL-10).
  • These T cells may participate in immunoregulatory networks, potentially delaying IDO's suppressive effects.

Conclusions:

  • IDO-reactive CD4(+) T cells exhibit a dual role, capable of both pro-inflammatory cytokine release and immune suppression.
  • These cells may play a complex role in regulating immune responses, potentially influencing the impact of IDO.
  • Further research is needed to fully elucidate the regulatory phenotype and function of IDO-specific CD4(+) T cells.