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Acute sexually transmitted infections increase human immunodeficiency virus type 1 plasma viremia, increase plasma

A O Anzala1, J N Simonsen, J Kimani

  • 1Department of Medical Microbiology, University of Manitoba, Winnipeg, Canada.

The Journal of Infectious Diseases
|July 29, 2000
PubMed
Summary

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Acute sexually transmitted infections (STIs) significantly increase human immunodeficiency virus type 1 (HIV-1) viremia in Kenyan female sex workers. Bacterial STIs may elevate HIV-1 viral load through inflammatory cytokines, impacting disease progression.

Area of Science:

  • Immunology
  • Virology
  • Public Health

Background:

  • Female sex workers in Kenya experience a median 4-year incubation period to AIDS.
  • Acute sexually transmitted infections (STIs) are common in this population.
  • The impact of STIs on human immunodeficiency virus type 1 (HIV-1) progression requires further investigation.

Purpose of the Study:

  • To investigate the influence of acute STIs on immunologic parameters and HIV-1 viremia in Kenyan women sex workers.
  • To determine the relationship between specific STIs (gonococcal cervicitis, pelvic inflammatory disease) and changes in immune markers and viral load.
  • To explore potential mechanisms, such as cytokine modulation, by which STIs affect HIV-1 replication.

Main Methods:

  • Longitudinal study of 32 HIV-1-positive and 10 HIV-1-negative women sex workers over 1-5 months.

Related Experiment Videos

  • Quantification of plasma cytokines, soluble cytokine receptors, CD4 and CD8 T cell counts, and HIV-1 plasma viremia.
  • Measurements taken before, during, and after episodes of acute STIs, including gonococcal cervicitis and pelvic inflammatory disease.

    • Main Results:

    • Acute gonococcal cervicitis was associated with increased interleukin (IL)-4, IL-6, IL-10, soluble tumor necrosis factor (TNF)-alpha, HIV-1 viremia, and decreased CD4(+) T cell counts.
    • HIV-1 viremia increases correlated with elevated IL-4 and reduced IL-6 concentrations during STIs.
    • Similar immunological and virological changes were observed during acute pelvic inflammatory disease, indicating acute bacterial STIs increase HIV-1 viremia.

    Conclusions:

    • Acute bacterial STIs, including gonococcal cervicitis and pelvic inflammatory disease, exacerbate HIV-1 replication in women.
    • Increased inflammatory cytokines (e.g., IL-4, IL-10, TNF-alpha) and altered immune responses may mediate the rise in HIV-1 viremia during STIs.
    • These findings highlight the critical need for STI management to control HIV-1 progression in high-risk populations.