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Related Experiment Videos

HIV-1 variability and progression to AIDS: a longitudinal study.

J R Fiore1, M L Calabró, G Angarano

  • 1Clinic of Infectious Diseases, University of Bari, Italy.

Journal of Medical Virology
|December 1, 1990
PubMed
Summary

The study found that the replicative activity of human immunodeficiency virus type 1 (HIV-1) impacts disease progression. Rapid-replicating HIV-1 strains are linked to faster disease advancement, while slow-replicating strains are associated with the asymptomatic phase.

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Area of Science:

  • Virology
  • Immunology
  • Infectious Diseases

Background:

  • Human immunodeficiency virus type 1 (HIV-1) infection is a global health concern.
  • Understanding the factors influencing HIV-1 disease progression is crucial for effective management.
  • Viral replicative capacity is a potential determinant of clinical outcomes in HIV-1 infection.

Purpose of the Study:

  • To investigate the relationship between HIV-1 replicative activity and the clinical and immunological evolution of infection.
  • To differentiate HIV-1 isolates based on replicative capacity and cytopathic effects.
  • To assess the impact of viral properties on disease progression in a cohort of Italian intravenous drug users.

Main Methods:

  • Longitudinal study over 1 year involving 150 HIV-1 seropositive Italian intravenous drug users.

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  • HIV-1 isolation and characterization based on in vitro replicative activity and cytopathic effects, categorizing viruses as 'rapid-high' or 'slow-low'.
  • Monitoring of clinical status, immunological markers (CD4 cell counts), and disease progression (ARC/AIDS development).

    • Main Results:

    • HIV-1 was isolated from 60% of subjects.
    • 'Rapid-high' viruses were more frequently recovered from patients with AIDS-related conditions (ARC/AIDS).
    • Asymptomatic subjects infected with 'rapid-high' viruses showed significant CD4 cell decline and a 45% progression to AIDS, compared to those with 'slow-low' viruses (9% progression) or negative viral cultures (0% progression).

    Conclusions:

    • HIV-1 replicative properties significantly influence the course of infection.
    • 'Rapid-high' viral strains are associated with more aggressive disease progression and faster immunological decline.
    • 'Slow-low' viral strains appear to be related to the asymptomatic phase of HIV-1 infection, with a lower risk of progression to AIDS.