Cited by 21SARS-CoV-2 and COVID-19 ResearchMonoclonal and Polyclonal Antibodies ResearchAnimal Virus Infections Studies

A Potent and Protective Human Neutralizing Antibody Against SARS-CoV-2 Variants

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Shan, Sisi, Mok, Chee Keng, Zhang, Shuyuan, Lan, Jun, Li, Jizhou, Yang, Ziqing, Wang, Ruoke, Cheng, Lin +11 more·2021·Frontiers in Immunology

Abstract

As severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants continue to emerge and spread around the world, antibodies and vaccines to confer broad and potent neutralizing activity are urgently needed. Through the isolation and characterization of monoclonal antibodies (mAbs) from individuals infected with SARS-CoV-2, we identified one antibody, P36-5D2, capable of neutralizing the major SARS-CoV-2 variants of concern. Crystal and electron cryo-microscopy (cryo-EM) structure analyses revealed that P36-5D2 targeted to a conserved epitope on the receptor-binding domain of the spike protein, withstanding the three key mutations—K417N, E484K, and N501Y—found in the variants that are responsible for escape from many potent neutralizing mAbs, including some already approved for emergency use authorization (EUA). A single intraperitoneal (IP) injection of P36-5D2 as a prophylactic treatment completely protected animals from challenge of infectious SARS-CoV-2 Alpha and Beta. Treated animals manifested normal body weight and were devoid of infection-associated death up to 14 days. A substantial decrease of the infectious virus in the lungs and brain, as well as reduced lung pathology, was found in these animals compared to the controls. Thus, P36-5D2 represents a new and desirable human antibody against the current and emerging SARS-CoV-2 variants.

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  • P36-5D2 was initially isolated from a convalescent patient and demonstrated reasonably strong potency and breadth against Alpha, Beta, and Gamma but not Delta.

    “To demonstrate the utility of our approach, we sought to optimize a human neutralizing antibody P36-5D2, which was initially isolated from a convalescent patient, and demonstrated reasonably strong potency and breadth against Alpha, Beta, and Gamma (33) but not Delta, due to Delta’s L452R but not T478K mutation through computational structure analysis.”

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Authors
Shan, S., Mok, C. K., Zhang, S., Lan, J., Li, J., Yang, Z., Wang, R., Cheng, L., Fang, M., Aw, Z. Q., Yu, J., Zhang, Q., Shi, X., Zhang, T., Zhang, Z., Wang, J., Wang, X., Chu, J. J. H., & Zhang, L.
Affiliations
  • Tsinghua University (CN)
  • National University of Singapore (SG)
  • Center for Life Sciences (CN)
  • Southern University of Science and Technology (CN)
  • Capital Medical University (CN)
  • Shenzhen Bay Laboratory (CN)
Corresponding author
  • Wang, Jianbin
  • Wang, Xinquan
  • Chu, Justin Jang Hann
  • Zhang, Linqi
Venue
Frontiers in Immunology
Published
2021-12-13
Volume
12
Pages
766821-766821
ISSN
1664-3224 (ISSN-L)
OpenAlex
W4200461445
Cited by
21
References
56
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 7 · 2022: 8
FWCI
1.34
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Immunology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • National University of Singapore (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Salt Science Research Foundation (BL17U1)
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, neutralizing monoclonal antibodies, spike protein receptor-binding domain, variants of concern, K417N, E484K, N501Y, antibody escape, prophylaxis, COVID-19 pandemic, antibody structure, lung pathology
MeSH terms
SARS-CoV-2, COVID-19 Drug Treatment, Animals, Antibodies, Monoclonal, Antibodies, Viral, Humans, Immunization, Passive, Mice, Antibodies, Neutralizing, HEK293 Cells

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