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Apoptosis in AIDS
1Department of Medicine Microbiology, University of Rochester Cancer Center, NY 14642, USA.
Summary
Human immunodeficiency virus type 1 (HIV-1) infection causes immune deficiency by inducing apoptosis, or programmed cell death, in CD4+ T-lymphocytes. This review details HIV-1 molecular factors triggering this cell death.
Area of Science:
- Immunology
- Virology
- Cell Biology
Background:
- Human immunodeficiency virus type 1 (HIV-1) infection progressively weakens the immune system.
- This immune decline is characterized by reduced CD4+ T-lymphocyte numbers and function.
- Mechanisms underlying HIV-1-induced CD4+ T-cell death in vivo remain incompletely understood.
Purpose of the Study:
- To review the molecular determinants of HIV-1 that induce apoptosis in T-lymphocytes.
- To highlight the roles of specific HIV-1 genes in T-cell apoptosis.
Main Methods:
- Literature review focusing on apoptosis induction by HIV-1.
- Analysis of studies investigating viral genes and their effects on T-lymphocyte apoptosis.
Main Results:
- Multiple, sometimes contradictory, pro- and anti-apoptotic stimuli are associated with HIV-1.
- Viral genes env, nef, tat, and vpr are implicated in inducing T-lymphocyte apoptosis.
Conclusions:
- HIV-1 utilizes various molecular mechanisms to induce apoptosis in CD4+ T-cells.
- Understanding these pathways is crucial for developing therapeutic strategies against HIV-1-induced immunodeficiency.