Cell Reports (Jul 2021)

Isolation and characterization of cross-neutralizing coronavirus antibodies from COVID-19+ subjects

  • Madeleine F. Jennewein,
  • Anna J. MacCamy,
  • Nicholas R. Akins,
  • Junli Feng,
  • Leah J. Homad,
  • Nicholas K. Hurlburt,
  • Emilie Seydoux,
  • Yu-Hsin Wan,
  • Andrew B. Stuart,
  • Venkata Viswanadh Edara,
  • Katharine Floyd,
  • Abigail Vanderheiden,
  • John R. Mascola,
  • Nicole Doria-Rose,
  • Lingshu Wang,
  • Eun Sung Yang,
  • Helen Y. Chu,
  • Jonathan L. Torres,
  • Gabriel Ozorowski,
  • Andrew B. Ward,
  • Rachael E. Whaley,
  • Kristen W. Cohen,
  • Marie Pancera,
  • M. Juliana McElrath,
  • Janet A. Englund,
  • Andrés Finzi,
  • Mehul S. Suthar,
  • Andrew T. McGuire,
  • Leonidas Stamatatos

Journal volume & issue
Vol. 36, no. 2
p. 109353

Abstract

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Summary: SARS-CoV-2 is one of three coronaviruses that have crossed the animal-to-human barrier and caused widespread disease in the past two decades. The development of a universal human coronavirus vaccine could prevent future pandemics. We characterize 198 antibodies isolated from four COVID-19+ subjects and identify 14 SARS-CoV-2 neutralizing antibodies. One targets the N-terminal domain (NTD), one recognizes an epitope in S2, and 11 bind the receptor-binding domain (RBD). Three anti-RBD neutralizing antibodies cross-neutralize SARS-CoV-1 by effectively blocking binding of both the SARS-CoV-1 and SARS-CoV-2 RBDs to the ACE2 receptor. Using the K18-hACE transgenic mouse model, we demonstrate that the neutralization potency and antibody epitope specificity regulates the in vivo protective potential of anti-SARS-CoV-2 antibodies. All four cross-neutralizing antibodies neutralize the B.1.351 mutant strain. Thus, our study reveals that epitopes in S2 can serve as blueprints for the design of immunogens capable of eliciting cross-neutralizing coronavirus antibodies.

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