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Related Experiment Videos

CD16+ NK cells decrease in all stages of HIV infection through a selective depletion of the CD16+CD8+CD3- subset.

I Mansour1, C Doinel, P Rouger

  • 1Institut National de Transfusion Sanguine, Paris, France.

AIDS Research and Human Retroviruses
|December 1, 1990
PubMed
Summary

Human immunodeficiency virus (HIV) infection significantly decreases natural killer (NK) cells, particularly the CD16+CD8+CD3- subset. This depletion begins early and remains constant throughout HIV infection stages.

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Area of Science:

  • Immunology
  • Virology
  • Cell Biology

Background:

  • Natural killer (NK) cells play a crucial role in the innate immune response against viral infections.
  • Human immunodeficiency virus (HIV) infection is known to dysregulate immune cell populations.
  • Understanding NK cell dynamics in HIV is vital for assessing immune status and disease progression.

Purpose of the Study:

  • To analyze natural killer (NK) cell-related phenotypes in individuals with varying stages of human immunodeficiency virus (HIV) infection.
  • To identify specific NK cell subsets affected by HIV and determine the stage at which these changes occur.

Main Methods:

  • Flow cytometry and monoclonal antibodies were used to analyze NK cell phenotypes.
  • 168 HIV-infected patients (CDC Stages II, III, and IV) and 60 healthy controls were studied.

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  • NK cell subsets, including CD16+CD8+ and CD16+CD8- populations, were quantified.

    • Main Results:

    • HIV-infected patients showed a significant decrease in CD16+ and CD16+CD3- NK cell phenotypes compared to controls.
    • A severe, selective depletion of the CD16+CD8+ subset was observed in HIV patients.
    • This depletion was evident from the asymptomatic (CDC Stage II) stage and remained constant across all disease stages.

    Conclusions:

    • HIV infection leads to a quantitative decrease in the total NK CD16+ cell population.
    • The observed decrease is primarily attributed to the selective depletion of the CD16+CD8+CD3- NK cell compartment.
    • This significant depletion of a specific NK cell subset starts early in HIV infection.