Brouwer, Philip J. M. and Antanasijevic, Aleksandar and de Gast, Marlon and Allen, Joel D and Bijl, Tom P. L. and Yasmeen, Anila and Ravichandran, Rashmi and Burger, Judith A. and Ozorowski, Gabriel and Torres, Jonathan L. and LaBranche, Celia and Montefiori, David C. and Ringe, Rajesh P. and Van Gils, Marit J. and Moore, John P. and Klasse, Per Johan and Crispin, Max and King, Neil P. and Ward, Andrew B. and Sanders, Rogier W. (2021) Immunofocusing and enhancing autologous Tier-2 HIV-1 neutralization by displaying Env trimers on two-component protein nanoparticles. NPJ VACCINES, 6 (1). pp. 1-24.
Full text not available from this repository. (Request a copy)Abstract
The HIV-1 envelope glycoprotein trimer is poorly immunogenic because it is covered by a dense glycan shield. As a result, recombinant Env glycoproteins generally elicit inadequate antibody levels that neutralize clinically relevant, neutralization-resistant (Tier-2) HIV-1 strains. Multivalent antigen presentation on nanoparticles is an established strategy to increase vaccine-driven immune responses. However, due to nanoparticle instability in vivo, the display of non-native Env structures, and the inaccessibility of many neutralizing antibody (NAb) epitopes, the effects of nanoparticle display are generally modest for Env trimers. Here, we generate two-component self-assembling protein nanoparticles presenting twenty SOSIP trimers of the clade C Tier-2 genotype 16055. We show in a rabbit immunization study that these nanoparticles induce 60-fold higher autologous Tier-2 NAb titers than the corresponding SOSIP trimers. Epitope mapping studies reveal that the presentation of 16055 SOSIP trimers on these nanoparticle focuses antibody responses to an immunodominant apical epitope. Thus, these nanoparticles are a promising platform to improve the immunogenicity of Env trimers with apex-proximate NAb epitopes.
| Item Type: | Article |
|---|---|
| Additional Information: | Open Access |
| Uncontrolled Keywords: | Immunology;Research & Experimental Medicine |
| Subjects: | Q Science > QR Microbiology > QR180 Immunology |
| Depositing User: | Dr. K.P.S.Sengar |
| Date Deposited: | 30 Mar 2021 06:12 |
| Last Modified: | 30 Mar 2021 06:12 |
| URI: | http://crdd.osdd.net/open/id/eprint/2664 |
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