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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
Published on: August 31, 2014
Virus and target cell evolution in human immunodeficiency virus type 1 infection
1Department of Immunology, The Scripps Research Institute, La Jolla, CA 92037, USA. dmosier@scripps.edu
Immunologic Research
|June 14, 2000
Summary
Human immunodeficiency virus (HIV) evades the immune system through rapid mutation and by targeting different cells. Understanding these viral and immune factors is key to combating HIV infection.
Area of Science:
- Immunology
- Virology
- Molecular Biology
Background:
- Human immunodeficiency virus (HIV) infection involves a complex interplay between viral evolution and the host immune response.
- In most cases, HIV overcomes the immune system's defenses, leading to persistent infection.
Purpose of the Study:
- To elucidate the viral and immune mechanisms enabling HIV to escape immune control.
- To understand how HIV evolves to target different host cells throughout the course of infection.
Main Methods:
- Analysis of viral mutation rates and immune evasion strategies.
- Investigation of chemokine coreceptor usage (CCR5, CXCR4) by HIV.
- Examination of target cell populations, including T cells and macrophages.
Main Results:
- HIV employs mechanisms like rapid mutation, decoy antigen shedding, MHC modulation, and cytotoxic T lymphocyte destruction to evade immunity.
- HIV's tropism shifts based on coreceptor usage, initially targeting CD4+ T cells (CCR5+) and later naive/memory T cells (CXCR4+) or macrophages.
- Target cell availability is a critical factor limiting viral spread, comparable to the immune response.
Conclusions:
- HIV's ability to rapidly evolve and alter target cell tropism are crucial for its persistence.
- Both viral evasion strategies and the dynamics of target cell populations significantly influence HIV pathogenesis.
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