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Recombination in HIV: an important viral evolutionary strategy
1Walter Reed Army Institute of Research, Rockville, MD 20850, USA. dburke@pasteur.hjf.org
Emerging Infectious Diseases
|July 1, 1997
Summary
Human immunodeficiency virus (HIV) is a diploid virus that can undergo recombination when coinfection occurs. This recombination process is a key evolutionary strategy for HIV, potentially leading to drug resistance and vaccine development challenges.
Area of Science:
- Virology
- Molecular Biology
- Evolutionary Biology
Background:
- Human immunodeficiency virus (HIV) possesses a diploid genome, with each virion containing two complete RNA strands.
- Coinfection of a single cell with two related HIV strains can lead to homologous recombination.
- Naturally occurring recombinant HIV strains are prevalent in regions with diverse genotypic variants, including a rapidly spreading strain in Southeast Asia.
Purpose of the Study:
- To explore the implications of homologous recombination in HIV.
- To understand the role of recombination in HIV evolution and drug resistance.
- To assess the impact of recombination on HIV vaccine development.
Main Methods:
- Analysis of naturally occurring recombinant HIV strains.
- Investigation of HIV replication mechanisms, including syncytium formation and transactivation.
- Theoretical modeling of recombination's role in HIV evolution.
Main Results:
- Recombinant HIV strains have been identified in infected populations globally.
- One specific recombinant strain has disseminated to millions in Southeast Asia.
- Recombination can generate high-level and multidrug-resistant HIV strains in treated patients.
Conclusions:
- Homologous recombination is a significant evolutionary strategy for HIV.
- Recombination poses challenges for developing effective HIV vaccines.
- Understanding HIV recombination is crucial for treatment and prevention strategies.