Cited by 20SARS-CoV-2 and COVID-19 Researchvaccines and immunoinformatics approachesMonoclonal and Polyclonal Antibodies Research

Structural basis of a two-antibody cocktail exhibiting highly potent and broadly neutralizing activities against SARS-CoV-2 variants including diverse Omicron sublineages

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Abstract

The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants of concern (VOCs), especially the latest Omicron, have exhibited severe antibody evasion. Broadly neutralizing antibodies with high potency against Omicron are urgently needed for understanding the working mechanisms and developing therapeutic agents. In this study, we characterized the previously reported F61, which was isolated from convalescent patients infected with prototype SARS-CoV-2, as a broadly neutralizing antibody against all VOCs including Omicron BA.1, BA.1.1, BA.2, BA.3 and BA.4 sublineages by utilizing antigen binding and cell infection assays. We also identified and characterized another broadly neutralizing antibody D2 with epitope distinct from that of F61. More importantly, we showed that a combination of F61 with D2 exhibited synergy in neutralization and protecting mice from SARS-CoV-2 Delta and Omicron BA.1 variants. Cryo-Electron Microscopy (Cryo-EM) structures of the spike-F61 and spike-D2 binary complexes revealed the distinct epitopes of F61 and D2 at atomic level and the structural basis for neutralization. Cryo-EM structure of the Omicron-spike-F61-D2 ternary complex provides further structural insights into the synergy between F61 and D2. These results collectively indicated F61 and F61-D2 cocktail as promising therapeutic antibodies for combating SARS-CoV-2 variants including diverse Omicron sublineages.

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Authors
Li, X., Pan, Y., Yin, Q., Wang, Z., Shan, S., Zhang, L., Yu, J., Qu, Y., Sun, L., Gui, F., Lu, J., Jing, Z., Wu, W., Huang, T., Shi, X., Li, J., Li, X., Li, D., Wang, S., Yang, M., Zhang, L., Duan, K., Liang, M., Yang, X., & Wang, X.
Affiliations
  • Tsinghua University (CN)
  • Chinese Center For Disease Control and Prevention (CN)
  • Shenzhen Bay Laboratory (CN)
  • China National Pharmaceutical Group Corporation (China) (CN)
Corresponding author
  • Liang, Mifang
  • Yang, Xiaoming
  • Wang, Xinquan
Venue
Cell Discovery
Published
2022-09-08
Volume
8
Issue
1
Pages
87-87
ISSN
2056-5968 (ISSN-L)
OpenAlex
W4295079698
Cited by
20
References
16
Citations by year
2026: 1 · 2025: 1 · 2024: 5 · 2023: 12 · 2022: 1
FWCI
2.32
Type
journal article
Language
en
Open access
Locations
  • Cell Discovery (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Greater South Information System
Funders
  • National Natural Science Foundation of China (2021YFC2600200, 32171202)
  • Tsinghua University
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
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Monoclonal and Polyclonal Antibodies Research
Keywords
SARS-CoV-2, Omicron subvariants, broadly neutralizing antibodies, antibody cocktail, D2, spike protein, epitope mapping, antibody synergy, neutralization mechanism, Omicron BA.1, Omicron BA.2, Omicron BA.4, Delta variant, therapeutic antibodies, cryo-EM structure

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