A highly potent antibody effective against SARS-CoV-2 variants of concern

Craig Fenwick, Priscilla Turelli, Laurent Perez, Céline Pellaton, Line Esteves-Leuenberger, Alex Farina, Jérémy Campos, Erica Lana, Flurin Fiscalini, Charlène Raclot, Florence Pojer, Kelvin Lau, Davide Demurtas, Marc Descatoire, Victor S Joo, Mathilde Foglierini, Alessandra Noto, Rana Abdelnabi, Caroline S Foo, Laura VangeelJohan Neyts, Wenjuan Du, Berend-Jan Bosch, Geertruida Veldman, Pieter Leyssen, Volker Thiel, Roger LeGrand, Yves Lévy, Didier Trono, Giuseppe Pantaleo

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Control of the ongoing SARS-CoV-2 pandemic is endangered by the emergence of viral variants with increased transmission efficiency, resistance to marketed therapeutic antibodies, and reduced sensitivity to vaccine-induced immunity. Here, we screen B cells from COVID-19 donors and identify P5C3, a highly potent and broadly neutralizing monoclonal antibody with picomolar neutralizing activity against all SARS-CoV-2 variants of concern (VOCs) identified to date. Structural characterization of P5C3 Fab in complex with the spike demonstrates a neutralizing activity defined by a large buried surface area, highly overlapping with the receptor-binding domain (RBD) surface necessary for ACE2 interaction. We further demonstrate that P5C3 shows complete prophylactic protection in the SARS-CoV-2-infected hamster challenge model. These results indicate that P5C3 opens exciting perspectives either as a prophylactic agent in immunocompromised individuals with poor response to vaccination or as combination therapy in SARS-CoV-2-infected individuals.

Original languageEnglish
Article number109814
JournalCell Reports
Volume37
Issue number2
DOIs
Publication statusPublished - 12 Oct 2021

Keywords

  • SARS-CoV-2
  • neutralizing antibodies
  • variants of concern

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