Virological characteristics of the SARS-CoV-2 Omicron BA.2.75 variant.
BA.2.75
COVID-19
Omicron
SARS-CoV-2
antiviral drug resistance
immune resistance
pathogenicity
transmissibility
Journal
Cell host & microbe
ISSN: 1934-6069
Titre abrégé: Cell Host Microbe
Pays: United States
ID NLM: 101302316
Informations de publication
Date de publication:
09 11 2022
09 11 2022
Historique:
received:
09
08
2022
revised:
27
09
2022
accepted:
04
10
2022
pubmed:
23
10
2022
medline:
15
11
2022
entrez:
22
10
2022
Statut:
ppublish
Résumé
The SARS-CoV-2 Omicron BA.2.75 variant emerged in May 2022. BA.2.75 is a BA.2 descendant but is phylogenetically distinct from BA.5, the currently predominant BA.2 descendant. Here, we show that BA.2.75 has a greater effective reproduction number and different immunogenicity profile than BA.5. We determined the sensitivity of BA.2.75 to vaccinee and convalescent sera as well as a panel of clinically available antiviral drugs and antibodies. Antiviral drugs largely retained potency, but antibody sensitivity varied depending on several key BA.2.75-specific substitutions. The BA.2.75 spike exhibited a profoundly higher affinity for its human receptor, ACE2. Additionally, the fusogenicity, growth efficiency in human alveolar epithelial cells, and intrinsic pathogenicity in hamsters of BA.2.75 were greater than those of BA.2. Our multilevel investigations suggest that BA.2.75 acquired virological properties independent of BA.5, and the potential risk of BA.2.75 to global health is greater than that of BA.5.
Identifiants
pubmed: 36272413
pii: S1931-3128(22)00516-9
doi: 10.1016/j.chom.2022.10.003
pmc: PMC9578327
pii:
doi:
Substances chimiques
Antibodies, Neutralizing
0
Antibodies, Viral
0
Antiviral Agents
0
Spike Glycoprotein, Coronavirus
0
spike protein, SARS-CoV-2
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1540-1555.e15Informations de copyright
Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.
Déclaration de conflit d'intérêts
Declaration of interests Y.Y. and T.N. are founders and shareholders of HiLung, Inc. Y.Y. is a co-inventor of patents (PCT/JP2016/057254; “method for inducing differentiation of alveolar epithelial cells,” PCT/JP2016/059786, “method of producing airway epithelial cells”).
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