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CXCR4-tropic HIV-1 infection in an immunocompetent monkey model
Nicholas R Meyerson1, Vanessa L Bauer1, Will T Fattor1
1BioFrontiers Institute, Department of Molecular, Cellular, and Developmental Biology, University of Colorado, Boulder, CO, 80303, USA.
Nature Communications
|March 10, 2026
Summary
Researchers developed a new immunocompetent owl monkey model for studying human immunodeficiency virus type 1 (HIV-1) infection. This model closely mimics key aspects of HIV-1 disease progression in humans, offering a valuable tool for research.
Area of Science:
- Virology
- Immunology
- Primatology
Background:
- Existing animal models for HIV-1 infection often utilize immunocompromised animals or surrogate viruses.
- There is a need for immunocompetent models that can be infected with actual HIV-1 to better understand viral pathogenesis and host responses.
Purpose of the Study:
- To establish and characterize an immunocompetent animal model for CXCR4-tropic HIV-1 infection in owl monkeys (Aotus nancymaae).
- To assess the susceptibility of owl monkeys to HIV-1 and evaluate the model's ability to recapitulate human HIV-1 infection dynamics.
Main Methods:
- Genetic and functional analysis of CD4 and Tetherin in owl monkeys.
- Modification of HIV-1 genome to overcome host restriction factors (TRIMCyp, APOBEC3G).
- Infection of immunocompetent owl monkeys with modified HIV-1 and monitoring of viral replication, viremia, seroconversion, and reservoir formation.
Main Results:
- Owl monkey CD4 and Tetherin support HIV-1 replication.
- Modified HIV-1 (93% wildtype sequence) successfully infected immunocompetent owl monkeys.
- The model demonstrated key features of human HIV-1 infection, including viral surge, set point viremia, seroconversion, and reservoir establishment.
Conclusions:
- An immunocompetent owl monkey model for HIV-1 infection has been successfully established.
- This model provides a valuable platform for studying HIV-1 pathogenesis and evaluating therapeutic strategies.
- Future research will investigate the model's utility for CCR5-tropic HIV-1 strains.
