Adeno-associated viral delivery of Env-specific antibodies prevents SIV rebound after discontinuing antiretroviral therapy
An alternative to lifelong antiretroviral therapy (ART) is needed to achieve durable control of HIV-1. Here, we show that adeno-associated virus (AAV) delivery of two rhesus macaque antibodies to the simian immunodeficiency virus (SIV) envelope glycoprotein (Env) with potent neutralization and antibody-dependent cellular cytotoxicity can prevent viral rebound in macaques infected with barcoded SIV<sub>mac</sub>239M after discontinuing suppressive ART. After AAV administration, sustained antibody expression with minimal antidrug antibody responses was achieved in all but one animal. After ART withdrawal, SIV replication rebounded within 2 weeks in all control animals but remained <15 copies per milliliter in plasma for more than a year in four of the eight animals that received AAV vectors encoding Env-specific antibodies. Viral sequences from animals that rebounded with delayed kinetics exhibited restricted clonal diversity and antibody escape mutations in Env. Thus, sustained expression of antibodies with potent antiviral activity can afford durable, ART-free containment of pathogenic SIV infection.
Authors
- David T. Evans (ORCID: https://orcid.org/0000-0003-2498-6292)
- Christine M. Fennessey (ORCID: https://orcid.org/0000-0002-8736-8523)
- Guangping Gao (ORCID: https://orcid.org/0000-0003-0097-9012)
- Rosemarie D. Mason (ORCID: https://orcid.org/0000-0001-7123-4902)
- Aimee Teo Broman (ORCID: https://orcid.org/0000-0003-3783-2807)
- Jeffrey D. Lifson (ORCID: https://orcid.org/0000-0002-9494-0268)
- Emek Köse (ORCID: https://orcid.org/0009-0001-9234-581X)
- Brandon F. Keele (ORCID: https://orcid.org/0000-0002-2381-1151)
- Natasha M. Clark (ORCID: https://orcid.org/0000-0002-3152-892X)
- Saverio Capuano (ORCID: https://orcid.org/0000-0003-2505-9124)
- Matthew R. Gardner (ORCID: https://orcid.org/0000-0003-2872-7597)
- Taina T. Immonen (ORCID: https://orcid.org/0000-0003-4521-0696)
- Vadim A. Klenchin
- Mario Roederer (ORCID: https://orcid.org/0000-0001-7448-7040)
- Nida K. Keles
Institutions
- National Institutes of Health (US)
- University of Wisconsin–Madison (US)
- Emory University (US)
- University of Massachusetts Chan Medical School (US)
- Frederick National Laboratory for Cancer Research (US)
- National Institute of Allergy and Infectious Diseases (US)
Publication Details
- Journal
- Science Immunology
- Published
- 2025-02-28
- DOI
- https://doi.org/10.1126/sciimmunol.adq4973
- Citations
- 3
- Primary Topic
- HIV Research and Treatment
- Type
- article
- Field-Weighted Citation Impact
- 3.11