The effect of cytokines and pharmacologic agents on chronic HIV infection

G Poli1, A S Fauci

  • 1Laboratory of Immunoregulation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892.

Insights

Human immunodeficiency virus (HIV) replication is controlled by cytokines. Understanding these cytokine interactions offers new therapeutic targets for managing HIV infection.

Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • Human immunodeficiency virus (HIV) replicates in CD+ T lymphocytes and mononuclear phagocytes (MP).
  • Immunoregulatory cytokines significantly influence HIV replication in these cells.
  • Interleukin-2 (IL-2) promotes T cell proliferation and HIV replication.

Purpose of the Study:

  • To investigate the role of various cytokines in regulating HIV replication.
  • To explore the mechanisms by which cytokines influence HIV expression.
  • To identify potential therapeutic strategies targeting cytokine-mediated HIV replication.

Main Methods:

  • Analysis of cytokine effects on HIV replication in T cells and MP.
  • Investigation of tumor necrosis factor-alpha/beta (TNF-alpha/-beta) mechanism involving NF-kB activation.
  • Assessment of colony-stimulating factors, IL-1, IL-3, IL-6, interferons (IFN-alpha/-beta), TGF-beta, IFN-gamma, and IL-4 on HIV production.

Main Results:

  • TNF-alpha/-beta trigger HIV expression in T cells and MP via NF-kB activation.
  • Certain cytokines upregulate HIV production, while interferons suppress it.
  • Other cytokines exhibit context-dependent regulatory effects on HIV expression.

Conclusions:

  • HIV expression is modulated by a complex cytokine network.
  • Cytokine-dependent pathways represent potential targets for novel anti-HIV pharmacologic strategies.
  • Agents like glucocorticoids, N-Acetyl-L-Cysteine (NAC), and retinoic acid (RA) interfere with cytokine-mediated HIV replication.

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