CD4-mimetic sulfopeptide conjugates display sub-nanomolar anti-HIV-1 activity and protect macaques against a SHIV162P3 vaginal challenge. - Institut Pasteur Access content directly
Journal Articles Scientific Reports Year : 2016

CD4-mimetic sulfopeptide conjugates display sub-nanomolar anti-HIV-1 activity and protect macaques against a SHIV162P3 vaginal challenge.

Timothée Bruel
Olivier Schwartz
  • Function : Author
  • PersonId : 999827
Hugues Lortat-Jacob

Abstract

The CD4 and the cryptic coreceptor binding sites of the HIV-1 envelope glycoprotein are key to viral attachment and entry. We developed new molecules comprising a CD4 mimetic peptide linked to anionic compounds (mCD4.1-HS12 and mCD4.1-PS1), that block the CD4-gp120 interaction and simultaneously induce the exposure of the cryptic coreceptor binding site, rendering it accessible to HS12- or PS1- mediated inhibition. Using a cynomolgus macaque model of vaginal challenge with SHIV162P3, we report that mCD4.1-PS1, formulated into a hydroxyethyl-cellulose gel provides 83% protection (5/6 animals). We next engineered the mCD4 moiety of the compound, giving rise to mCD4.2 and mCD4.3 that, when conjugated to PS1, inhibited cell-free and cell-associated HIV-1 with particularly low IC50, in the nM to pM range, including some viral strains that were resistant to the parent molecule mCD4.1. These chemically defined molecules, which target major sites of vulnerability of gp120, are stable for at least 48 hours in conditions replicating the vaginal milieu (37 °C, pH 4.5). They efficiently mimic several large gp120 ligands, including CD4, coreceptor or neutralizing antibodies, to which their efficacy compares very favorably, despite a molecular mass reduced to 5500 Da. Together, these results support the development of such molecules as potential microbicides.
Fichier principal
Vignette du fichier
srep34829.pdf (850.05 Ko) Télécharger le fichier
Origin : Publication funded by an institution
Loading...

Dates and versions

pasteur-01423094 , version 1 (28-12-2016)

Licence

Attribution

Identifiers

Cite

Kevin K Ariën, Françoise Baleux, Delphine Desjardins, Françoise Porrot, Yves-Marie Coïc, et al.. CD4-mimetic sulfopeptide conjugates display sub-nanomolar anti-HIV-1 activity and protect macaques against a SHIV162P3 vaginal challenge.. Scientific Reports, 2016, 6, pp.34829. ⟨10.1038/srep34829⟩. ⟨pasteur-01423094⟩
1459 View
362 Download

Altmetric

Share

Gmail Facebook X LinkedIn More