Related Experiment Videos
Recombination following superinfection by HIV-1
Guowei Fang1, Barbara Weiser, Carla Kuiken
1Wadsworth Center, NY State Department of Health, Albany, 12208, USA.
AIDS (London, England)
|April 13, 2004
Summary
Superinfection with diverse strains can lead to HIV-1 recombination in untreated individuals. This study found evidence of intersubtype recombination in a chronically infected woman, explaining the rise in recombinant HIV-1 globally.
Area of Science:
- Virology
- Immunology
- Epidemiology
Background:
- Increasing global recognition of recombinant Human Immunodeficiency Virus type 1 (HIV-1) strains.
- Uncertainty regarding whether recombination arises from superinfection during untreated, chronic HIV-1 infection.
Purpose of the Study:
- To investigate evidence of HIV-1 recombination and superinfection in Africa.
- To leverage diverse HIV-1 subtypes in Africa for strain identification.
Main Methods:
- Analysis of serial blood samples from chronically infected, untreated women in Nairobi.
- Complete HIV-1 RNA sequence analysis of seven long-term survivors.
- Computational analysis of sequences, including SimPlot and Heteroduplex tracking assays.
Main Results:
- One woman demonstrated evidence of both superinfection and recombination.
- Initial HIV-1 subtype A sequence in 1986 evolved into subtype A/C recombinants by 1995/1997.
- Subtype C sequences were not detectable as minor species in the initial 1986 sample.
Conclusions:
- Intersubtype recombination occurred between an initial subtype A strain and a superinfecting subtype C strain in an untreated woman.
- This finding contributes to understanding the increasing prevalence of recombinant HIV-1 strains worldwide.
- Superinfection-driven recombination may hinder the development of broad immune responses crucial for an effective HIV vaccine.