Stabilization of HIV-1 envelope in the CD4-bound conformation through specific cross-linking of a CD4 mimetic.

Journal Article (Journal Article)

CD4 binding on gp120 leads to the exposure of highly conserved regions recognized by the HIV co-receptor CCR5 and by CD4-induced (CD4i) antibodies. A covalent gp120-CD4 complex was shown to elicit CD4i antibody responses in monkeys, which was correlated with control of the HIV virus infection (DeVico, A., Fouts, T., Lewis, G. K., Gallo, R. C., Godfrey, K., Charurat, M., Harris, I., Galmin, L., and Pal, R. (2007) Proc. Natl. Acad. Sci. U.S.A. 104, 17477-17482). Because the inclusion of CD4 in a vaccine formulation should be avoided, due to potential autoimmune reactions, we engineered small sized CD4 mimetics (miniCD4s) that are poorly immunogenic and do not induce anti-CD4 antibodies. We made covalent complexes between such an engineered miniCD4 and gp120 or gp140, through a site-directed coupling reaction. These complexes were recognized by CD4i antibodies as well as by the HIV co-receptor CCR5. In addition, they elicit CD4i antibody responses in rabbits and therefore represent potential vaccine candidates that mimic an important HIV fusion intermediate, without autoimmune hazard.

Full Text

Duke Authors

Cited Authors

  • Martin, G; Burke, B; Thaï, R; Dey, AK; Combes, O; Ramos, OHP; Heyd, B; Geonnotti, AR; Montefiori, DC; Kan, E; Lian, Y; Sun, Y; Abache, T; Ulmer, JB; Madaoui, H; Guérois, R; Barnett, SW; Srivastava, IK; Kessler, P; Martin, L

Published Date

  • June 17, 2011

Published In

Volume / Issue

  • 286 / 24

Start / End Page

  • 21706 - 21716

PubMed ID

  • 21487012

Pubmed Central ID

  • PMC3122227

Electronic International Standard Serial Number (EISSN)

  • 1083-351X

Digital Object Identifier (DOI)

  • 10.1074/jbc.M111.232272


  • eng

Conference Location

  • United States