Cited by 305SARS-CoV-2 and COVID-19 ResearchMonoclonal and Polyclonal Antibodies ResearchAnimal Virus Infections Studies

Antibody potency, effector function, and combinations in protection and therapy for SARS-CoV-2 infection in vivo

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Schäfer, Alexandra, Muecksch, Frauke, Lorenzi, Julio C.C., Leist, Sarah R., Cipolla, Melissa, Bournazos, Stylianos, Schmidt, Fabian, Maison, Rachel M. +10 more·2021·Journal of Experimental Medicine

Published version of a preprint

Abstract

SARS-CoV-2, the causative agent of COVID-19, has been responsible for over 42 million infections and 1 million deaths since its emergence in December 2019. There are few therapeutic options and no approved vaccines. Here, we examine the properties of highly potent human monoclonal antibodies (hu-mAbs) in a Syrian hamster model of SARS-CoV-2 and in a mouse-adapted model of SARS-CoV-2 infection (SARS-CoV-2 MA). Antibody combinations were effective for prevention and in therapy when administered early. However, in vitro antibody neutralization potency did not uniformly correlate with in vivo protection, and some hu-mAbs were more protective in combination in vivo. Analysis of antibody Fc regions revealed that binding to activating Fc receptors contributes to optimal protection against SARS-CoV-2 MA. The data indicate that intact effector function can affect hu-mAb protective activity and that in vivo testing is required to establish optimal hu-mAb combinations for COVID-19 prevention.

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  • Non-neutralizing antibodies that bind viral proteins could contribute to immune control by clearing free virus or targeting infected cells.

    “Antibodies that bind to viral proteins but do not neutralize SARS-CoV-2 could still contribute to the immune control of infection through the increased clearance of free virus or by targeting infected cells for immune clearance (through antibody-dependent cellular cytotoxicity and other mechanisms)25 (preprint data, not yet peer reviewed)26.”
  • Residual non-neutralizing antibodies after infection may provide some protection during reinfection even when serum neutralizing activity is below the protective threshold.

    “Thus, residual SARS-CoV-2-specific non-neutralizing antibodies following infection may confer some protective benefit during reinfection, even when serum neutralizing activity has declined below the threshold of protection25–27.”
  • Antibodies in classes 1 and 2 are both highly potent and highly abundant.

    “Class 1 and 2 antibodies are among the most potent and also the most abundant antibodies7,8,21,22,25,39.”
  • Passive transfer of nAbs limits respiratory tract infection and protects against infection in animal models.

    “passive transfer of nAbs limits respiratory tract infection and protects against infection in animal models (16–20)”
  • Antibody functions besides neutralization have been shown to correlate with protection.

    “antibody functions other than neutralization have been shown to correlate with protection (Bartsch et al., 2021; Gorman et al., 2021; Schäfer et al., 2021).”

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Authors
Schäfer, A., Muecksch, F., Lorenzi, J. C. C., Leist, S. R., Cipolla, M., Bournazos, S., Schmidt, F., Maison, R. M., Gazumyan, A., Martinez, D. R., Baric, R. S., Robbiani, D. F., Hatziioannou, T., Ravetch, J. V., Bieniasz, P. D., Bowen, R. A., Nussenzweig, M. C., & Sheahan, T. P.
Affiliations
  • University of North Carolina at Chapel Hill (US)
  • Rockefeller University (US)
  • Colorado State University (US)
  • Institute for Research in Biomedicine (CH)
  • Laboratory of Retrovirology, The Rockefeller University, New York, NY 2
  • Howard Hughes Medical Institute (US)
Corresponding author
  • Nussenzweig, Michel C.
  • Sheahan, Timothy P.
Venue
Journal of Experimental Medicine
Published
2020-11-19
Volume
218
Issue
3
ISSN
  • 0022-1007 (ISSN-L)
  • 1540-9538
OpenAlex
W3099530525
Cited by
305
References
43
Citations by year
2026: 9 · 2025: 19 · 2024: 25 · 2023: 45 · 2022: 81 · 2021: 124 · 2020: 2
FWCI
8.27
Type
journal article
Language
en
Open access
Locations
  • The Journal of Experimental Medicine (publishedVersion, cc-by-nc-sa)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nd)
  • PubMed Central (publishedVersion, cc-by-nc-sa)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • PubMed Central (submittedVersion, cc-by-nc-nd)
  • UNC Libraries
Funders
  • George Mason University
  • National Institute of Allergy and Infectious Diseases (1U19AI142759)
  • Antiviral Drug Discovery and Development Center (P01-AI138398-S1, 2U1 9AI111825, R01AI137276, U19AI111825)
  • Howard Hughes Medical Institute
  • The Rockefeller University
  • North Carolina Policy Collaboratory
  • University of North Carolina at Chapel Hill
  • North Carolina Coronavirus Relief Fund
  • North Carolina General Assembly
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
Keywords
SARS-CoV-2, COVID-19 pandemic, human monoclonal antibodies, antibody combinations, antibody potency, neutralization, Fc receptors, effector function, Syrian hamster model, passive immunization, prevention and treatment

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