SARS-CoV-2 Omicron-B.1.1.529 leads to widespread escape from neutralizing antibody responses.



Dejnirattisai, Wanwisa, Huo, Jiandong, Zhou, Daming, Zahradník, Jiří, Supasa, Piyada, Liu, Chang, Duyvesteyn, Helen ME, Ginn, Helen M, Mentzer, Alexander J, Tuekprakhon, Aekkachai
et al (show 63 more authors) (2022) SARS-CoV-2 Omicron-B.1.1.529 leads to widespread escape from neutralizing antibody responses. Cell, 185 (3). 467-484.e15.

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Abstract

On 24<sup>th</sup> November 2021, the sequence of a new SARS-CoV-2 viral isolate Omicron-B.1.1.529 was announced, containing far more mutations in Spike (S) than previously reported variants. Neutralization titers of Omicron by sera from vaccinees and convalescent subjects infected with early pandemic Alpha, Beta, Gamma, or Delta are substantially reduced, or the sera failed to neutralize. Titers against Omicron are boosted by third vaccine doses and are high in both vaccinated individuals and those infected by Delta. Mutations in Omicron knock out or substantially reduce neutralization by most of the large panel of potent monoclonal antibodies and antibodies under commercial development. Omicron S has structural changes from earlier viruses and uses mutations that confer tight binding to ACE2 to unleash evolution driven by immune escape. This leads to a large number of mutations in the ACE2 binding site and rebalances receptor affinity to that of earlier pandemic viruses.

Item Type: Article
Uncontrolled Keywords: OPTIC Consortium, ISARIC4C Consortium
Divisions: Faculty of Health and Life Sciences
Faculty of Health and Life Sciences > Institute of Infection, Veterinary and Ecological Sciences
Faculty of Health and Life Sciences > Institute of Life Courses and Medical Sciences
Faculty of Health and Life Sciences > Institute of Population Health
Faculty of Health and Life Sciences > Institute of Systems, Molecular and Integrative Biology
Depositing User: Symplectic Admin
Date Deposited: 11 Feb 2022 10:27
Last Modified: 18 Jan 2023 21:12
DOI: 10.1016/j.cell.2021.12.046
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3148752