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A Restriction Enzyme Based Cloning Method to Assess the In vitro Replication Capacity of HIV-1 Subtype C Gag-MJ4 Chimeric Viruses
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A Restriction Enzyme Based Cloning Method to Assess the In vitro Replication Capacity of HIV-1 Subtype C Gag-MJ4 Chimeric Viruses

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Viral load and CD4+ T-cell dynamics in primary HIV-1 subtype C infection

Vladimir Novitsky1, Elias Woldegabriel, Lemme Kebaabetswe

  • 1Department of Immunology and Infectious Diseases, Harvard School of Public Health, Boston, MA 02115, USA.

Journal of Acquired Immune Deficiency Syndromes (1999)
|March 20, 2009
PubMed

Insights

Early HIV-1 subtype C infection shows distinct viral RNA evolution patterns. This study characterizes viral load, CD4+ T-cell counts, and proviral DNA kinetics in the first year postseroconversion.

Area of Science:

  • Virology
  • Immunology
  • Infectious Diseases

Background:

  • Limited data exists on early Human Immunodeficiency Virus type 1 (HIV-1) subtype C infection kinetics.
  • Most prior research focused on HIV-1 subtype B, leaving a knowledge gap for subtype C.

Purpose of the Study:

  • To characterize viral RNA, proviral DNA, and CD4+ T-cell dynamics in the initial year of HIV-1 subtype C infection.
  • To identify distinct patterns of viral evolution in early subtype C infections.

Main Methods:

  • Longitudinal study of 8 acute and 62 recent HIV-1 subtype C infections.
  • Quantification of viral RNA, proviral DNA, and CD4+ T-cell counts (including CCR5/CXCR4 expression).
  • Analysis of viral and immunological parameters over the first year postseroconversion.

Main Results:

  • Viral RNA peaked at 6.25 ± 0.92 log10 copies/mL; distinct patterns of viral load and CD4+ T-cell count changes were observed postseroconversion.
  • Proviral DNA showed no clear peak, with a mean of 2.59 ± 0.69 log10 per 10^6 PBMCs.
  • In recent infections, viral RNA set point (4.00 ± 0.97 log10) correlated inversely with CD4+ T-cells and directly with proviral DNA.

Conclusions:

  • Distinct patterns of viral RNA evolution emerge early in HIV-1 subtype C infection.
  • This research enhances understanding of the early pathogenesis of HIV-1 subtype C.
Abstract

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