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Updated: Jun 25, 2026
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Analysis of Simian Immunodeficiency Virus-specific CD8+ T-cells in Rhesus Macaques by Peptide-MHC-I Tetramer Staining
Published on: December 23, 2016
A macaque model of HIV-1 infection
Theodora Hatziioannou1, Zandrea Ambrose, Nancy P Y Chung
1Aaron Diamond AIDS Research Center, The Rockefeller University, New York, NY 10021, USA. thatziio@adarc.org
Summary
Researchers developed a novel simian-tropic (st)HIV-1 model in macaques, crucial for AIDS research. This model shows high viral replication and allows testing of HIV-1 therapies, advancing preclinical investigations.
Area of Science:
- Virology
- Immunology
- Primate Models
Background:
- Existing primate models for AIDS research often use simian viruses divergent from human immunodeficiency virus type 1 (HIV-1).
- This divergence limits the translatability of preclinical findings to human HIV-1 infection.
- Species-specific variations in TRIM5 and APOBEC3 antiretroviral genes influence viral tropism.
Purpose of the Study:
- To create a primate model that utilizes HIV-1 as the challenge virus for improved AIDS research.
- To develop minimally modified simian-tropic (st)HIV-1 strains capable of replicating in macaques.
- To evaluate the efficacy of antiretroviral therapy in this new HIV-1-based primate model.
Main Methods:
- Construction of simian-tropic (st)HIV-1 strains with modifications limited to the vif gene.
- In vitro replication assays using pig-tailed macaque (Macaca nemestrina) lymphocytes.
- Infection of pig-tailed macaques with stHIV-1 to assess viremia, persistence, and immune control.
- Chemoprophylaxis experiment using a standard HIV-1 therapeutic regimen.
Main Results:
- Minimally modified stHIV-1 strains replicated efficiently in pig-tailed macaque lymphocytes in vitro.
- Infection of macaques with stHIV-1 led to acute viremia comparable to human HIV-1 infection levels.
- Persistent stHIV-1 infection was established for several months and subsequently controlled, partly by CD8+ T cells.
- Antiretroviral therapy demonstrated sterilizing protection against high-dose stHIV-1 challenge.
Conclusions:
- A novel HIV-1-based primate model using stHIV-1 has been successfully established in pig-tailed macaques.
- This model mimics key aspects of human HIV-1 infection, including acute viremia and immune control.
- The model's utility is demonstrated by successful chemoprophylaxis, offering a valuable platform for preclinical testing of HIV-1 interventions.
