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Updated: Aug 2, 2025

Engineering Antiviral Agents via Surface Plasmon Resonance
Published on: June 14, 2022
Does the SARS-CoV-2 spike really have an Achilles heel?
A newly discovered antibody neutralizes SARS-CoV-2 variants by targeting a vulnerable spike protein site. This antibody shows promise for future COVID-19 treatments and vaccines, offering broad protection against emerging strains.
Area of Science:
- Immunology
- Virology
- Infectious Diseases
Background:
- Emerging SARS-CoV-2 variants and diminishing vaccine immunity necessitate novel COVID-19 treatments.
- The spike protein's receptor binding domain (RBD) is a key target for therapeutic antibodies.
Purpose of the Study:
- To identify and characterize a potent neutralizing antibody against SARS-CoV-2 variants.
- To evaluate the therapeutic and prophylactic potential of this antibody in preclinical models.
Main Methods:
- Isolation and characterization of a human monoclonal antibody targeting the SARS-CoV-2 spike protein.
- Assessment of antibody neutralization breadth against diverse SARS-CoV-2 variants, including Omicron subvariants.
- In vivo efficacy studies in a hamster model challenged with SARS-CoV-2 variants.
Main Results:
- The isolated antibody targets a vulnerable site on the spike protein's RBD in its 'up' conformation.
- This antibody demonstrated cross-neutralization activity against all tested SARS-CoV-2 variants.
- The antibody conferred protection against multiple variants in a hamster model of COVID-19.
Conclusions:
- A novel antibody targeting a conserved vulnerable site on the SARS-CoV-2 spike protein offers broad cross-neutralization and protection.
- This antibody represents a promising candidate for next-generation COVID-19 prophylactic and therapeutic strategies.
- Findings may inform future vaccine design for enhanced SARS-CoV-2 immunity.
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