Most rhesus macaques infected with the CCR5-tropic SHIV(AD8) generate cross-reactive antibodies that neutralize multiple HIV-1 strains.


Journal Article

The induction of broadly reacting neutralizing antibodies has been a major goal of HIV vaccine research. Characterization of a pathogenic CCR5 (R5)-tropic SIV/HIV chimeric virus (SHIV) molecular clone (SHIV(AD8-EO)) revealed that eight of eight infected animals developed cross-reactive neutralizing antibodies (NAbs) directed against an envelope glycoprotein derived from the heterologous HIV-1(DH12) strain. A panel of plasmas, collected from monkeys inoculated with either molecularly cloned or uncloned SHIV(AD8) stocks, exhibited cross-neutralization against multiple tier 1 and tier 2 HIV-1 clade B isolates. One SHIV(AD8)-infected animal also developed NAbs against clades A and C HIV-1 strains. In this particular infected macaque, the cross-reacting anti-HIV-1 NAbs produced between weeks 7 and 13 were directed against a neutralization-sensitive virus strain, whereas neutralizing activities emerging at weeks 41-51 targeted more neutralization-resistant HIV-1 isolates. These results indicate that the SHIV(AD8) macaque model represents a potentially valuable experimental system for investigating B-cell maturation and the induction of cross-reactive NAbs directed against multiple HIV-1 strains.

Full Text

Duke Authors

Cited Authors

  • Shingai, M; Donau, OK; Schmidt, SD; Gautam, R; Plishka, RJ; Buckler-White, A; Sadjadpour, R; Lee, WR; LaBranche, CC; Montefiori, DC; Mascola, JR; Nishimura, Y; Martin, MA

Published Date

  • November 27, 2012

Published In

Volume / Issue

  • 109 / 48

Start / End Page

  • 19769 - 19774

PubMed ID

  • 23129652

Pubmed Central ID

  • 23129652

Electronic International Standard Serial Number (EISSN)

  • 1091-6490

Digital Object Identifier (DOI)

  • 10.1073/pnas.1217443109


  • eng

Conference Location

  • United States