SARS-CoV-2 Omicron sublineages show comparable cell entry but differential neutralization by therapeutic antibodies
The Omicron variant of SARS-CoV-2 evades antibody-mediated neutralization with unprecedented efficiency. At least three Omicron sublineages have been identified—BA.1, BA.2, and BA.3—and BA.2 exhibits increased transmissibility. However, it is currently unknown whether BA.2 differs from the other sub...
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Published in | Cell Host & Microbe Vol. 30; no. 8; pp. 1103 - 1111.e6 |
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Main Authors | , , , , , , , , , , , , , , |
Format | Journal Article Web Resource |
Language | English |
Published |
United States
Elsevier Inc
10.08.2022
Elsevier BV |
Subjects | |
Online Access | Get full text |
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Summary: | The Omicron variant of SARS-CoV-2 evades antibody-mediated neutralization with unprecedented efficiency. At least three Omicron sublineages have been identified—BA.1, BA.2, and BA.3—and BA.2 exhibits increased transmissibility. However, it is currently unknown whether BA.2 differs from the other sublineages regarding cell entry and antibody-mediated inhibition. Here, we show that BA.1, BA.2, and BA.3 enter and fuse target cells with similar efficiency and in an ACE2-dependent manner. However, BA.2 was not efficiently neutralized by seven of eight antibodies used for COVID-19 therapy, including Sotrovimab, which robustly neutralized BA.1. In contrast, BA.2 and BA.3 (but not BA.1) were appreciably neutralized by Cilgavimab, which could constitute a treatment option. Finally, all sublineages were comparably and efficiently neutralized by antibodies induced by BNT162b2 booster vaccination after previous two-dose homologous or heterologous vaccination. Collectively, the Omicron sublineages show comparable cell entry and neutralization by vaccine-induced antibodies but differ in susceptibility to therapeutic antibodies.
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•SARS-CoV-2 Omicron BA.1, BA.2, and BA.3 harbor shared and unique spike protein mutations•BA.1, BA.2, and BA.3 enter and fuse target cells with similar efficiency•mRNA vaccine boosters comparably increase neutralization of BA.1, BA.2, and BA.3•BA.1, BA.2, and BA.3 differ regarding neutralization by therapeutic antibodies
The SARS-CoV-2 Omicron variant contains at least three main sublineages that harbor shared and unique spike protein mutations. Arora et al. show that sublineages BA.1, BA.2, and BA.3 enter cells with similar efficiency and are comparably neutralized by antibodies induced by BNT162b2 booster vaccination but differ regarding neutralization by therapeutic antibodies. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 These authors contributed equally Lead contact |
ISSN: | 1931-3128 1934-6069 1934-6069 |
DOI: | 10.1016/j.chom.2022.04.017 |