Sustained Delivery of a Broadly Neutralizing Antibody in Nonhuman Primates Confers Long-Term Protection against Simian/Human Immunodeficiency Virus Infection.

Journal Article (Journal Article)

UNLABELLED: Pathogen-specific neutralizing antibodies protect against many viral infections and can potentially prevent human immunodeficiency virus (HIV) transmission in humans. However, neutralizing antibodies have so far only been shown to protect nonhuman primates (NHP) against lentiviral infection when given shortly before challenge. Thus, the clinical utility and feasibility of passive antibody transfer to confer long-term protection against HIV-1 are still debated. Here, we investigate the potential of a broadly neutralizing HIV-1 antibody to provide long-term protection in a NHP model of HIV-1 infection. A human antibody was simianized to avoid immune rejection and used to sustain therapeutic levels for ∼5 months. Two months after the final antibody administration, animals were completely protected against viral challenge. These findings demonstrate the feasibility and potential of long-term passive antibody for protection against HIV-1 in humans and provide a model to test antibody therapies for other diseases in NHP. IMPORTANCE: Antibodies against HIV are potential drugs that may be able to prevent HIV infection in humans. However, the long-term protective capacity of antibodies against HIV has not been assessed. Here, we repetitively administered a macaque version of a human anti-HIV antibody to monkeys, after which the antibody persisted in the blood for >5 months. Moreover, the antibody could be sustained at protective levels for 108 days, conferring protection 52 days after the last dose in a monkey model of HIV infection. Thus, passive antibody transfer can provide durable protection against infection by viruses that cause AIDS in primates.

Full Text

Duke Authors

Cited Authors

  • Saunders, KO; Pegu, A; Georgiev, IS; Zeng, M; Joyce, MG; Yang, Z-Y; Ko, S-Y; Chen, X; Schmidt, SD; Haase, AT; Todd, J-P; Bao, S; Kwong, PD; Rao, SS; Mascola, JR; Nabel, GJ

Published Date

  • June 2015

Published In

Volume / Issue

  • 89 / 11

Start / End Page

  • 5895 - 5903

PubMed ID

  • 25787288

Pubmed Central ID

  • PMC4442454

Electronic International Standard Serial Number (EISSN)

  • 1098-5514

Digital Object Identifier (DOI)

  • 10.1128/JVI.00210-15


  • eng

Conference Location

  • United States