Cited by 135SARS-CoV-2 and COVID-19 ResearchAnimal Virus Infections Studiesvaccines and immunoinformatics approaches

Structural Basis for Potent Cross-Neutralizing Human Monoclonal Antibody Protection against Lethal Human and Zoonotic Severe Acute Respiratory Syndrome Coronavirus Challenge

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Rockx, Barry, Corti, Davide, Donaldson, Eric, Sheahan, Timothy, Stadler, Konrad, Lanzavecchia, Antonio, Baric, Ralph·2008·Journal of Virology

Abstract

Severe acute respiratory syndrome coronavirus (SARS-CoV) emerged in 2002, and detailed phylogenetic and epidemiological analyses have suggested that it originated from animals. The spike (S) glycoprotein has been identified as a major component of protective immunity, and 23 different amino acid changes were noted during the expanding epidemic. Using a panel of SARS-CoV recombinants bearing the S glycoproteins from isolates representing the zoonotic and human early, middle, and late phases of the epidemic, we identified 23 monoclonal antibodies (MAbs) with neutralizing activity against one or multiple SARS-CoV spike variants and determined the presence of at least six distinct neutralizing profiles in the SARS-CoV S glycoprotein. Four of these MAbs showed cross-neutralizing activity against all human and zoonotic S variants in vitro, and at least three of these were mapped in distinct epitopes using escape mutants, structure analyses, and competition assays. These three MAbs (S109.8, S227.14, and S230.15) were tested for use in passive vaccination studies using lethal SARS-CoV challenge models for young and senescent mice with four different homologous and heterologous SARS-CoV S variants. Both S227.14 and S230.15 completely protected young and old mice from weight loss and virus replication in the lungs for all viruses tested, while S109.8 completely protected mice from weight loss and clinical signs in the presence of viral titers. We conclude that a single human MAb can confer broad protection against lethal challenge with multiple zoonotic and human SARS-CoV isolates, and we identify a robust cocktail formulation that targets distinct epitopes and minimizes the likely generation of escape mutants.

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Crossref · 10.1128/jvi.02377-07

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Authors
Rockx, B., Corti, D., Donaldson, E., Sheahan, T., Stadler, K., Lanzavecchia, A., & Baric, R.
Affiliations
  • Department of Epidemiology
  • Institute for Research in Biomedicine (CH)
  • University of North Carolina at Chapel Hill (US)
  • Novartis (Italy) (IT)
Corresponding author
Baric, Ralph
Venue
Journal of Virology
Published
2008-04
Volume
82
Issue
7
Pages
3220-3235
ISSN
  • 0022-538X (ISSN-L)
  • 1098-5514
OpenAlex
W2155387067
Cited by
134
References
58
Citations by year
2026: 1 · 2025: 2 · 2024: 3 · 2023: 5 · 2022: 7 · 2021: 18 · 2020: 49 · 2019: 6 · 2017: 3 · 2015: 4 · 2014: 6 · 2013: 1 · 2012: 4
FWCI
5.36
Type
journal article
Language
en
Open access
Locations
  • Journal of Virology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Carolina Digital Repository (University of North Carolina at Chapel Hill) (submittedVersion)
  • RePub (Erasmus University Rotterdam) (submittedVersion, other-oa)
  • UNC Libraries
Funders
  • European Commission
  • National Institutes of Health
  • National Institute of Allergy and Infectious Diseases (P01-AI059136, R01AI059136, P01AI059443)
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
Keywords
SARS-CoV, monoclonal antibodies, cross-neutralization, spike protein, passive immunization, antibody escape mutants, epitope mapping, antibody cocktail
MeSH terms
Animals, Antibodies, Monoclonal, Antibodies, Viral, Body Weight, Cross Reactions, Female, Humans, Immunization, Passive, Lung, Membrane Glycoproteins, Mice, Inbred BALB C, Models, Molecular, Neutralization Tests, Viral Envelope Proteins, Survival Analysis, Epitope Mapping, Severe Acute Respiratory Syndrome, Severe acute respiratory syndrome-related coronavirus, Mice, Spike Glycoprotein, Coronavirus

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