Genital tract viral load in HIV Type 1-positive women correlates with specific cytokine levels in cervical-vaginal secretions but is not a determinant of infectious virus or anti-HIV activity

AIDS Res Hum Retroviruses. 2012 Nov;28(11):1533-9. doi: 10.1089/aid.2011.0394. Epub 2012 Mar 23.

Abstract

As the AIDS epidemic continues with women being disproportionately affected, it is crucial to understand factors that predict the risk of heterosexual HIV-1 transmission. We investigated whether genital tract viral load (GTVL) in cervical-vaginal lavages (CVL) from HIV-1-positive women with moderately low CD4 T cell counts correlates with cytokine levels, antimicrobial concentrations, and intrinsic anti-HIV activity. CVL were collected from 19 HIV-1-positive women with moderately low CD4 T cell counts [mean 381 cells/mm(3) (227-536 cells/mm(3))]. None of the women was on antiretroviral therapy. The women were categorized into those with detectable GTVL or those with undetectable GTVL (detectable GTVL RNA levels > 400 copies/ml). Women were also categorized according to bacterial vaginosis (BV) status irrespective of GTVL. The TZM-bl assay was used to determine the presence of infectious virus and anti-HIV activity. Significantly higher levels of RANTES, Eotaxin, Fractalkine, IL-1α, IL-6, MCP-1, MIP1β, MIP1α, TNF-α, and GM-CSF were observed in women with detectable GTVL compared to women with undetectable GTVL. No significant differences were observed in the following cytokines and chemokines: G-CSF, IL-1RA, IL-8, and IP-10. GTVL did not correlate either with antimicrobials known to have anti-HIV activity or with the presence of infectious virus. BV status did not have a significant effect on anti-HIV activity. These findings further our understanding of the role of GTVL in determining the cytokine and chemokine milieu in the female reproductive tract.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Acquired Immunodeficiency Syndrome / pathology
  • Acquired Immunodeficiency Syndrome / transmission
  • Acquired Immunodeficiency Syndrome / virology*
  • Adult
  • CD4 Lymphocyte Count
  • Cervix Uteri / metabolism
  • Cervix Uteri / virology*
  • Cytokines / metabolism*
  • Female
  • HIV-1*
  • Humans
  • Middle Aged
  • RNA, Viral
  • Vagina / metabolism
  • Vagina / virology*
  • Vaginal Douching
  • Viral Load

Substances

  • Cytokines
  • RNA, Viral