Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant

Small animal models are of crucial importance for assessing COVID-19 countermeasures. Common laboratory mice would be well-suited for this purpose but are not susceptible to infection with wild-type SARS-CoV-2. However, the development of mouse-adapted virus strains has revealed key mutations in the...

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Autores principales: Ravi Kant, Lauri Kareinen, Teemu Smura, Tobias L. Freitag, Sawan Kumar Jha, Kari Alitalo, Seppo Meri, Tarja Sironen, Kalle Saksela, Tomas Strandin, Anja Kipar, Olli Vapalahti
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Publicado: MDPI AG 2021
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Acceso en línea:https://doaj.org/article/9db092c8cdc34f92a0a8969eeb34ef38
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spelling oai:doaj.org-article:9db092c8cdc34f92a0a8969eeb34ef382021-11-25T19:13:54ZCommon Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant10.3390/v131122631999-4915https://doaj.org/article/9db092c8cdc34f92a0a8969eeb34ef382021-11-01T00:00:00Zhttps://www.mdpi.com/1999-4915/13/11/2263https://doaj.org/toc/1999-4915Small animal models are of crucial importance for assessing COVID-19 countermeasures. Common laboratory mice would be well-suited for this purpose but are not susceptible to infection with wild-type SARS-CoV-2. However, the development of mouse-adapted virus strains has revealed key mutations in the SARS-CoV-2 spike protein that increase infectivity, and interestingly, many of these mutations are also present in naturally occurring SARS-CoV-2 variants of concern. This suggests that these variants might have the ability to infect common laboratory mice. Herein we show that the SARS-CoV-2 beta variant attains infectibility to BALB/c mice and causes pulmonary changes within 2–3 days post infection, consistent with results seen in other murine models of COVID-19, at a reasonable virus dose (2 × 10<sup>5</sup> PFU). The findings suggest that common laboratory mice can serve as the animal model of choice for testing the effectiveness of antiviral drugs and vaccines against SARS-CoV-2.Ravi KantLauri KareinenTeemu SmuraTobias L. FreitagSawan Kumar JhaKari AlitaloSeppo MeriTarja SironenKalle SakselaTomas StrandinAnja KiparOlli VapalahtiMDPI AGarticleSARS-CoV2COVID-19SARS-CoV-2 variantsSARS-CoV-2 beta variantsinfectionslaboratory miceMicrobiologyQR1-502ENViruses, Vol 13, Iss 2263, p 2263 (2021)
institution DOAJ
collection DOAJ
language EN
topic SARS-CoV2
COVID-19
SARS-CoV-2 variants
SARS-CoV-2 beta variants
infections
laboratory mice
Microbiology
QR1-502
spellingShingle SARS-CoV2
COVID-19
SARS-CoV-2 variants
SARS-CoV-2 beta variants
infections
laboratory mice
Microbiology
QR1-502
Ravi Kant
Lauri Kareinen
Teemu Smura
Tobias L. Freitag
Sawan Kumar Jha
Kari Alitalo
Seppo Meri
Tarja Sironen
Kalle Saksela
Tomas Strandin
Anja Kipar
Olli Vapalahti
Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant
description Small animal models are of crucial importance for assessing COVID-19 countermeasures. Common laboratory mice would be well-suited for this purpose but are not susceptible to infection with wild-type SARS-CoV-2. However, the development of mouse-adapted virus strains has revealed key mutations in the SARS-CoV-2 spike protein that increase infectivity, and interestingly, many of these mutations are also present in naturally occurring SARS-CoV-2 variants of concern. This suggests that these variants might have the ability to infect common laboratory mice. Herein we show that the SARS-CoV-2 beta variant attains infectibility to BALB/c mice and causes pulmonary changes within 2–3 days post infection, consistent with results seen in other murine models of COVID-19, at a reasonable virus dose (2 × 10<sup>5</sup> PFU). The findings suggest that common laboratory mice can serve as the animal model of choice for testing the effectiveness of antiviral drugs and vaccines against SARS-CoV-2.
format article
author Ravi Kant
Lauri Kareinen
Teemu Smura
Tobias L. Freitag
Sawan Kumar Jha
Kari Alitalo
Seppo Meri
Tarja Sironen
Kalle Saksela
Tomas Strandin
Anja Kipar
Olli Vapalahti
author_facet Ravi Kant
Lauri Kareinen
Teemu Smura
Tobias L. Freitag
Sawan Kumar Jha
Kari Alitalo
Seppo Meri
Tarja Sironen
Kalle Saksela
Tomas Strandin
Anja Kipar
Olli Vapalahti
author_sort Ravi Kant
title Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant
title_short Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant
title_full Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant
title_fullStr Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant
title_full_unstemmed Common Laboratory Mice Are Susceptible to Infection with the SARS-CoV-2 Beta Variant
title_sort common laboratory mice are susceptible to infection with the sars-cov-2 beta variant
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/9db092c8cdc34f92a0a8969eeb34ef38
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