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Related Concept Videos

Immunodeficiency Diseases01:25

Immunodeficiency Diseases

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Early and nonreversible decrease of CD161++ /MAIT cells in HIV infection.

Cormac Cosgrove1, James E Ussher, Andri Rauch

  • 1National Institute for Health Research Biomedical Research Centre, University of Oxford, Oxford, UK. pcosgrove@partners.org

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Summary
This summary is machine-generated.

Mucosal associated invariant T (MAIT) cells are depleted in early HIV infection and do not recover with treatment. This loss of MAIT cells may increase susceptibility to opportunistic infections in individuals with HIV.

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Area of Science:

  • Immunology
  • Virology
  • Infectious Diseases

Background:

  • HIV infection causes immune dysfunction and susceptibility to opportunistic infections.
  • Mucosal associated invariant T (MAIT) cells are crucial for mucosal immunity and host defense.
  • MAIT cells are characterized by CD161 expression and TCR Vα7.2.

Purpose of the Study:

  • To investigate the frequency and function of CD161++ /MAIT cells in HIV infection.
  • To determine if MAIT cell populations recover after HIV treatment.

Main Methods:

  • Analysis of peripheral blood and tissue samples from HIV-infected patients.
  • Flow cytometry to quantify CD161++ /MAIT cell populations.
  • Assessment of MAIT cell function and potential mechanisms of depletion.

Main Results:

  • A significant decrease in CD161++ /MAIT cells was observed in early HIV infection.
  • MAIT cell populations failed to recover even with successful HIV treatment.
  • Evidence suggests MAIT cell depletion occurs through mechanisms other than direct viral infection, such as tissue accumulation and activation-induced cell death.

Conclusions:

  • HIV infection leads to a persistent depletion of MAIT cells.
  • Loss of MAIT cells may compromise mucosal immunity in HIV patients.
  • MAIT cell depletion could contribute to increased susceptibility to opportunistic infections in HIV.