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Related Experiment Videos

Polymorphonuclear leukocyte function in HIV-1-infected chimpanzees.

L J Lafrado1, D A Quintana, M A Javadian

  • 1Department of Virology/Immunology, Primate Research Institute, Holloman Air Force Base, NM 88330.

Veterinary Immunology and Immunopathology
|May 1, 1989
PubMed
Summary

Human immunodeficiency virus (HIV) infection suppresses neutrophil function in chimpanzees, particularly those with prior hepatitis non-A, non B infection. This impaired neutrophil response impacts immune defenses against pathogens.

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Area of Science:

  • Immunology
  • Virology
  • Cellular Biology

Background:

  • Neutrophils play a crucial role in the innate immune system.
  • Human immunodeficiency virus (HIV) infection is known to impair immune function.
  • Previous hepatitis non-A, non B infection in chimpanzees may alter immune responses.

Purpose of the Study:

  • To assess the chemiluminescent characteristics of neutrophils in HIV-infected chimpanzees.
  • To compare neutrophil function in HIV-infected chimpanzees with control groups.
  • To investigate the impact of HIV on neutrophil responses to various stimuli.

Main Methods:

  • Enriched neutrophil populations were isolated from control and HIV-infected chimpanzees.
  • Chemiluminescence assays were used to measure neutrophil responses.

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  • Neutrophils were stimulated with particulate (latex beads) and soluble (phorbol ester) agents.

    • Main Results:

    • Neutrophils from HIV-infected chimpanzees showed suppressed responses to both particulate and soluble stimuli.
    • Particulate stimulation elicited an aberrant, non-biphasic response in HIV-infected chimpanzees, unlike the biphasic response in controls.
    • HIV infection demonstrated an additive suppressive effect on neutrophil function in chimpanzees previously infected with hepatitis non-A, non B.

    Conclusions:

    • HIV infection significantly impairs chimpanzee neutrophil function.
    • The observed suppression of neutrophil function by HIV is comparable to effects seen in other retroviral infections.
    • These findings highlight the detrimental impact of HIV on innate immune cells in a non-primate model.