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Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining
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Functional deficiency of polymorphonuclear leukocytes in simian acquired immunodeficiency syndrome

A T Cheung1, M B Gardner

  • 1Department of Medical Pathology, University of California, Davis 95616.

American Journal of Veterinary Research
|September 1, 1991
PubMed

Insights

Polymorphonuclear leukocytes (PMN) in macaques with simian acquired immunodeficiency syndrome (SAIDS) show functional deficiencies. These immune cell impairments may explain opportunistic infections in SAIDS.

Area of Science:

  • Immunology
  • Virology
  • Primatology

Background:

  • Polymorphonuclear leukocytes (PMN) are crucial for host defense against infections.
  • Simian retrovirus (SRV) infection in rhesus macaques leads to simian acquired immunodeficiency syndrome (SAIDS).

Purpose of the Study:

  • To evaluate the functional characteristics of PMN in macaques with SRV-induced SAIDS.
  • To determine if PMN dysfunction correlates with SAIDS progression and clinical signs.

Main Methods:

  • Assessed chemotactic responsiveness of PMN.
  • Evaluated phagocytic and killing capabilities of PMN.
  • Measured PMN cell membrane deformability.

Main Results:

  • PMN from SRV-positive macaques without clinical signs exhibited normal function.
  • PMN from macaques with clinical SAIDS were chemotactically nonresponsive.
  • PMN from SAIDS macaques showed compromised phagocytic/killing abilities and rigid cell membranes.

Conclusions:

  • PMN from macaques with clinically confirmed SAIDS are functionally deficient.
  • This PMN deficiency may contribute to recurrent and opportunistic infections in SAIDS.
  • Findings align with PMN dysfunction observed in other retroviral infections.

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