PreprintCited by 26SARS-CoV-2 and COVID-19 Researchvaccines and immunoinformatics approachesAnimal Virus Infections Studies

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Engineered Immunogens to Elicit Antibodies Against Conserved Coronavirus Epitopes

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Preprint — published as 10.1038/s41467-023-43638-9

Abstract

Immune responses to SARS-CoV-2 primarily target the receptor binding domain of the spike protein, which continually mutates to escape acquired immunity. Other regions in the spike S2 subunit, such as the stem helix and the segment encompassing residues 815-823 adjacent to the fusion peptide, are highly conserved across sarbecoviruses and are recognized by broadly reactive antibodies, providing hope that vaccines targeting these epitopes could offer protection against both current and emergent viruses. Here we employed computational modeling to design scaffolded immunogens that display the spike 815-823 peptide and the stem helix epitopes without the distracting and immunodominant RBD. These engineered proteins bound with high affinity and specificity to the mature and germline versions of previously identified broadly protective human antibodies. Epitope scaffolds interacted with both sera and isolated monoclonal antibodies with broadly reactivity from individuals with pre-existing SARS-CoV-2 immunity. When used as immunogens, epitope scaffolds elicited sera with broad betacoronavirus reactivity and protected as “boosts” against live virus challenge in mice, illustrating their potential as components of a future pancoronavirus vaccine.

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Metadata

Authors
Kapingidza, B., Marston, D. J., Harris, C., Wrapp, D., Winters, K., Mielke, D., Xiaozhi, L., Yin, Q., Foulger, A., Parks, R., Barr, M., Newman, A., Schäfer, A., Eaton, A., Flores, J. M., Harner, A., Cantazaro, N. J., Mallory, M. L., Mattocks, M. D., Beverly, C., Rhodes, B., Mansouri, K., Itallie, E. V., Vure, P., Manness, B., Keyes, T., Stanfield-Oakley, S., Woods, C. W., Petzold, E. A., Walter, E. B., Wiehe, K., Edwards, R. J., Montefiori, D., Ferrari, G., Baric, R., Cain, D. W., Saunders, K. O., Haynes, B. F., & Azoitei, M. L.
Affiliations
  • Duke University (US)
  • University of North Carolina at Chapel Hill (US)
Corresponding author
Azoitei, Mihai L.
Venue
Nature Communications
Publisher
openRxiv
Published
2023-02-28
Volume
14
Issue
1
Pages
7897-7897
ISSN
2041-1723 (ISSN-L)
OpenAlex
W4389183324
Cited by
26
References
1
Citations by year
2026: 7 · 2025: 12 · 2024: 5 · 2023: 2
FWCI
5.35
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Nature Communications (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion, cc-by)
  • PubMed Central (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • U.S. Department of Energy (Contract No. W-31-109-Eng-38, W - 31 - 109 - Eng - 38)
  • U.S. Department of Health and Human Services (R01AI155804, P01AI158571)
  • Office of Science (W-31-109-ENG-38)
  • National Institute of Allergy and Infectious Diseases (R01AI155804, P01AI158571, T32AI007392)
  • Basic Energy Sciences (W-31-109-Eng38)
  • Argonne National Laboratory (W-31-109-ENG-38)
Topics
  • Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › vaccines and immunoinformatics approaches
  • Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Virus Infections Studies
Keywords
SARS-CoV-2, spike protein, conserved epitopes, broadly neutralizing antibodies, fusion peptide, receptor binding domain, monoclonal antibodies, vaccine design, betacoronaviruses, antibody escape

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