Attenuated fusogenicity and pathogenicity of SARS-CoV-2 Omicron variant.
Nature
; 603(7902): 700-705, 2022 03.
Article
de En
| MEDLINE
| ID: mdl-35104835
ABSTRACT
The emergence of the Omicron variant of SARS-CoV-2 is an urgent global health concern1. In this study, our statistical modelling suggests that Omicron has spread more rapidly than the Delta variant in several countries including South Africa. Cell culture experiments showed Omicron to be less fusogenic than Delta and than an ancestral strain of SARS-CoV-2. Although the spike (S) protein of Delta is efficiently cleaved into two subunits, which facilitates cell-cell fusion2,3, the Omicron S protein was less efficiently cleaved compared to the S proteins of Delta and ancestral SARS-CoV-2. Furthermore, in a hamster model, Omicron showed decreased lung infectivity and was less pathogenic compared to Delta and ancestral SARS-CoV-2. Our multiscale investigations reveal the virological characteristics of Omicron, including rapid growth in the human population, lower fusogenicity and attenuated pathogenicity.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Sujet principal:
Pénétration virale
/
SARS-CoV-2
/
COVID-19
/
Fusion membranaire
Type d'étude:
Prognostic_studies
Limites:
Animals
/
Humans
/
Male
Pays/Région comme sujet:
Africa
Langue:
En
Journal:
Nature
Année:
2022
Type de document:
Article
Pays d'affiliation:
Japon