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Related Experiment Videos

Multiple patterns of alloantigen presenting/stimulating cell dysfunction in patients with AIDS.

M Clerici1, A L Landay, H A Kessler

  • 1Experimental Immunology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Md 20892.

Journal of Immunology (Baltimore, Md. : 1950)
|April 1, 1991
PubMed
Summary

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Peripheral blood mononuclear cells (PBMC) from patients with AIDS show defects in antigen-presenting cell/stimulating cell (APC/SC) function. This study developed a method to assess APC/SC function in all individuals with AIDS.

Area of Science:

  • Immunology
  • Virology
  • Cell Biology

Background:

  • Peripheral blood mononuclear cells (PBMC) play a crucial role in immune responses.
  • Antigen-presenting cell/stimulating cell (APC/SC) function is vital for T-cell activation.
  • Human immunodeficiency virus (HIV) infection, leading to Acquired Immunodeficiency Syndrome (AIDS), is known to cause T-cell defects.

Purpose of the Study:

  • To investigate the APC/SC potential of PBMC from individuals at different stages of HIV infection.
  • To determine if defects in APC/SC function are present in patients with AIDS.
  • To establish a reliable method for assessing APC/SC function in all AIDS patients.

Main Methods:

  • Utilized an allogeneic mixed lymphocyte reaction (MLR) to test APC/SC potential.

Related Experiment Videos

  • PBMC from Walter Reed stage 1 and 2 patients and AIDS patients were used as stimulators.
  • Responding cells were PBMC from HIV- donors, either unfractionated or depleted of APC.

    • Main Results:

    • PBMC from Walter Reed stage 1 and 2 patients showed no defect in APC/SC potential.
    • PBMC from AIDS patients exhibited varied APC/SC function: normal, presenting cell defect, or stimulating cell defect.
    • A defect in APC/SC function was observed in AIDS patients, independent of responder cell status in some cases.

    Conclusions:

    • Individuals with AIDS can exhibit defects in APC/SC function, in addition to known T-cell defects.
    • The developed method allows for the assessment of Ag-presenting function in all AIDS patients.
    • This research expands the understanding of immune dysregulation in AIDS and provides a diagnostic tool.