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Cerca | Lliura | Ajuda | Servei de Biblioteques | Sobre el DDD | Català English Español | |||||||||
| Pàgina inicial > Articles > Articles publicats > Heterogeneous Infectivity and Pathogenesis of SARS-CoV-2 Variants Beta, Delta and Omicron in Transgenic K18-hACE2 and Wildtype Mice |
| Data: | 2022 |
| Resum: | The emerging SARS-CoV-2 variants of concern (VOCs) may display enhanced transmissibility, more severity and/or immune evasion; however, the pathogenesis of these new VOCs in experimental SARS-CoV-2 models or the potential infection of other animal species is not completely understood. Here we infected K18-hACE2 transgenic mice with B. 1, B. 1. 351/Beta, B. 1. 617. 2/Delta and BA. 1. 1/Omicron isolates and demonstrated heterogeneous infectivity and pathogenesis. B. 1. 351/Beta variant was the most pathogenic, while BA. 1. 1/Omicron led to lower viral RNA in the absence of major visible clinical signs. In parallel, we infected wildtype (WT) mice and confirmed that, contrary to B. 1 and B. 1. 617. 2/Delta, B. 1. 351/Beta and BA. 1. 1/Omicron can infect them. Infection in WT mice coursed without major clinical signs and viral RNA was transient and undetectable in the lungs by day 7 post-infection. In silico modeling supported these findings by predicting B. 1. 351/Beta receptor binding domain (RBD) mutations result in an increased affinity for both human and murine ACE2 receptors, while BA. 1/Omicron RBD mutations only show increased affinity for murine ACE2. |
| Ajuts: | Agencia Estatal de Investigación PID2020-117145RB-I00 Instituto de Salud Carlos III PI17/01518 Instituto de Salud Carlos III PI20/00093 Instituto de Salud Carlos III PI18/01332 |
| Nota: | Altres ajuts: Fundació La Marató de TV3 202126-30-21 |
| Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
| Llengua: | Anglès |
| Document: | Article ; recerca ; Versió publicada |
| Matèria: | SARS-CoV-2 variants of concern ; ACE2 ; Viral load ; Histology ; In silico modeling ; Infection ; K18-hACE2 mice ; Wildtype mice |
| Publicat a: | Frontiers in microbiology, Vol. 13 (may 2022) , ISSN 1664-302X |
13 p, 6.5 MB |