Tetravalent SARS-CoV-2 Neutralizing Antibodies Show Enhanced Potency and Resistance to Escape Mutations

[Display omitted] •Rapid isolation of neutralizing antibodies without natural immune repertoires.•Facile re-reformatting to tetravalent antibodies enhances potency.•Tetravalent antibodies possess drug-like yields, stability and specificity.•Structural characterization reveals multiple modes of S-pro...

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Veröffentlicht in:Journal of molecular biology 2021-09, Vol.433 (19), p.167177-167177, Article 167177
Hauptverfasser: Miersch, Shane, Li, Zhijie, Saberianfar, Reza, Ustav, Mart, Brett Case, James, Blazer, Levi, Chen, Chao, Ye, Wei, Pavlenco, Alevtina, Gorelik, Maryna, Garcia Perez, Julia, Subramania, Suryasree, Singh, Serena, Ploder, Lynda, Ganaie, Safder, Chen, Rita E., Leung, Daisy W., Pandolfi, Pier Paolo, Novelli, Giuseppe, Matusali, Giulia, Colavita, Francesca, Capobianchi, Maria R., Jain, Suresh, Gupta, J.B., Amarasinghe, Gaya K., Diamond, Michael S., Rini, James, Sidhu, Sachdev S.
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Sprache:eng
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Zusammenfassung:[Display omitted] •Rapid isolation of neutralizing antibodies without natural immune repertoires.•Facile re-reformatting to tetravalent antibodies enhances potency.•Tetravalent antibodies possess drug-like yields, stability and specificity.•Structural characterization reveals multiple modes of S-protein binding.•Tetravalent formats also enhance antibody resistance to mutational escape. Neutralizing antibodies (nAbs) hold promise as therapeutics against COVID-19. Here, we describe protein engineering and modular design principles that have led to the development of synthetic bivalent and tetravalent nAbs against SARS-CoV-2. The best nAb targets the host receptor binding site of the viral S-protein and tetravalent versions block entry with a potency exceeding bivalent nAbs by an order of magnitude. Structural studies show that both the bivalent and tetravalent nAbs can make multivalent interactions with a single S-protein trimer, consistent with the avidity and potency of these molecules. Significantly, we show that the tetravalent nAbs show increased tolerance to potential virus escape mutants and an emerging variant of concern. Bivalent and tetravalent nAbs can be produced at large-scale and are as stable and specific as approved antibody drugs. Our results provide a general framework for enhancing antiviral therapies against COVID-19 and related viral threats, and our strategy can be applied to virtually any antibody drug.
ISSN:0022-2836
1089-8638
1089-8638
DOI:10.1016/j.jmb.2021.167177