Vaccine Induction of Heterologous Tier 2 HIV-1 Neutralizing Antibodies in Animal Models.

Journal Article

The events required for the induction of broad neutralizing antibodies (bnAbs) following HIV-1 envelope (Env) vaccination are unknown, and their induction in animal models as proof of concept would be critical. Here, we describe the induction of plasma antibodies capable of neutralizing heterologous primary (tier 2) HIV-1 strains in one macaque and two rabbits. Env immunogens were designed to induce CD4 binding site (CD4bs) bnAbs, but surprisingly, the macaque developed V1V2-glycan bnAbs. Env immunization of CD4bs bnAb heavy chain rearrangement (VHDJH) knockin mice similarly induced V1V2-glycan neutralizing antibodies (nAbs), wherein the human CD4bs VH chains were replaced with mouse rearrangements bearing diversity region (D)-D fusions, creating antibodies with long, tyrosine-rich HCDR3s. Our results show that Env vaccination can elicit broad neutralization of tier 2 HIV-1, demonstrate that V1V2-glycan bnAbs are more readily induced than CD4bs bnAbs, and define VH replacement and diversity region fusion as potential mechanisms for generating V1V2-glycan bnAb site antibodies.

Full Text

Duke Authors

Cited Authors

  • Saunders, KO; Verkoczy, LK; Jiang, C; Zhang, J; Parks, R; Chen, H; Housman, M; Bouton-Verville, H; Shen, X; Trama, AM; Scearce, R; Sutherland, L; Santra, S; Newman, A; Eaton, A; Xu, K; Georgiev, IS; Joyce, MG; Tomaras, GD; Bonsignori, M; Reed, SG; Salazar, A; Mascola, JR; Moody, MA; Cain, DW; Centlivre, M; Zurawski, S; Zurawski, G; Erickson, HP; Kwong, PD; Alam, SM; Levy, Y; Montefiori, DC; Haynes, BF

Published Date

  • December 2017

Published In

Volume / Issue

  • 21 / 13

Start / End Page

  • 3681 - 3690

PubMed ID

  • 29281818

Electronic International Standard Serial Number (EISSN)

  • 2211-1247

International Standard Serial Number (ISSN)

  • 2211-1247

Digital Object Identifier (DOI)

  • 10.1016/j.celrep.2017.12.028

Language

  • eng