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Humanized mice reconstituted with a human immune system can be mucosally infected with human immunodeficiency virus (HIV), opening up the possibility of studying HIV transmission in a small-animal model. Here we report that passive immunization with the broadly neutralizing antibody b12 protected humanized mice against repetitive intravaginal infection in a dose-dependent manner. In addition, treatment with the antibody PGT126, which is more potent in vitro, was more efficacious in vivo and provided sterilizing protection. Our results demonstrate that humanized mice can be used as a small-animal model to study the efficacy and mechanism of broadly neutralizing antibody protection against HIV acquisition.

the journal of infectious diseases (online. university of chicago press)/the journal of infectious diseases

Protection of Humanized Mice From Repeated Intravaginal HIV Challenge by Passive Immunization: A Model for Studying the Efficacy of Neutralizing Antibodies In Vivo