Shark nanobodies with potent SARS-CoV-2 neutralizing activity and broad sarbecovirus reactivity.
Animals
Mice
Antibodies, Neutralizing
Antibodies, Viral
COVID-19
/ prevention & control
Epitopes
Ferritins
/ genetics
Immunoglobulin Fc Fragments
Mice, Transgenic
SARS-CoV-2
/ genetics
Severe acute respiratory syndrome-related coronavirus
Single-Domain Antibodies
Spike Glycoprotein, Coronavirus
/ genetics
Sharks
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
03 02 2023
03 02 2023
Historique:
received:
18
10
2022
accepted:
13
01
2023
pubmed:
4
2
2023
medline:
8
2
2023
entrez:
3
2
2023
Statut:
epublish
Résumé
Despite rapid and ongoing vaccine and therapeutic development, SARS-CoV-2 continues to evolve and evade, presenting a need for next-generation diverse therapeutic modalities. Here we show that nurse sharks immunized with SARS-CoV-2 recombinant receptor binding domain (RBD), RBD-ferritin (RFN), or spike protein ferritin nanoparticle (SpFN) immunogens elicit a set of new antigen receptor antibody (IgNAR) molecules that target two non-overlapping conserved epitopes on the spike RBD. Representative shark antibody variable NAR-Fc chimeras (ShAbs) targeting either of the two epitopes mediate cell-effector functions, with high affinity to all SARS-CoV-2 viral variants of concern, including the divergent Omicron strains. The ShAbs potently cross-neutralize SARS-CoV-2 WA-1, Alpha, Beta, Delta, Omicron BA.1 and BA.5, and SARS-CoV-1 pseudoviruses, and confer protection against SARS-CoV-2 challenge in the K18-hACE2 transgenic mouse model. Structural definition of the RBD-ShAb01-ShAb02 complex enabled design and production of multi-specific nanobodies with enhanced neutralization capacity, and picomolar affinity to divergent sarbecovirus clade 1a, 1b and 2 RBD molecules. These shark nanobodies represent potent immunotherapeutics both for current use, and future sarbecovirus pandemic preparation.
Identifiants
pubmed: 36737435
doi: 10.1038/s41467-023-36106-x
pii: 10.1038/s41467-023-36106-x
pmc: PMC9896449
doi:
Substances chimiques
Antibodies, Neutralizing
0
Antibodies, Viral
0
Epitopes
0
Ferritins
9007-73-2
Immunoglobulin Fc Fragments
0
Single-Domain Antibodies
0
Spike Glycoprotein, Coronavirus
0
spike protein, SARS-CoV-2
0
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
580Subventions
Organisme : NIH HHS
ID : S10 OD021527
Pays : United States
Organisme : NIGMS NIH HHS
ID : P30 GM124165
Pays : United States
Informations de copyright
© 2023. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.
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