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Related Experiment Videos

Selective decrease in human immunodeficiency virus type 1 (HIV-1)-induced alpha interferon production by peripheral

J Ferbas1, J Navratil, A Logar

  • 1Department of Infectious Diseases and Microbiology, University of Pittsburgh Graduate School of Public Health, Pennsylvania.

Clinical and Diagnostic Laboratory Immunology
|March 1, 1995
PubMed
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Human immunodeficiency virus (HIV-1) infection impairs alpha interferon (IFN-alpha) production in blood dendritic cells, but not monocytes or B cells. This defect may contribute to HIV-1 progression and AIDS development.

Area of Science:

  • Immunology
  • Virology
  • Infectious Diseases

Background:

  • Previous studies showed viruses like HIV-1, HSV, and Sendai virus induce higher IFN-alpha in dendritic cells than monocytes in healthy individuals.
  • Alpha interferon (IFN-alpha) is crucial for antiviral immunity.

Purpose of the Study:

  • To investigate the impact of HIV-1 infection on IFN-alpha production by peripheral blood mononuclear cells (PBMCs).
  • To determine if HIV-1 affects IFN-alpha production differently across various immune cell types.

Main Methods:

  • Comparing IFN-alpha induction by HIV-1 strains (IIIb, RF, BaL), HSV, and Sendai virus in PBMCs from HIV-1-infected and healthy individuals.
  • Assessing the acid stability of IFN-alpha produced by PBMCs from both groups.

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Main Results:

  • IFN-alpha induction by HIV-1 and HSV was significantly reduced in PBMCs from HIV-1-infected subjects.
  • Sendai virus induced normal IFN-alpha levels in PBMCs from HIV-1-infected individuals.
  • IFN-alpha from HIV-1-infected subjects was partially acid labile, unlike the acid-stable IFN-alpha from controls.

Conclusions:

  • A selective defect in IFN-alpha production by peripheral blood dendritic cells exists in HIV-1 infection.
  • Monocytes and B lymphocytes retain their IFN-alpha-producing capacity.
  • Impaired IFN-alpha response to HIV-1 and other pathogens may drive disease progression and AIDS development.