Journal
TRANSGENIC RESEARCH
Volume 30, Issue 3, Pages 289-301Publisher
SPRINGER
DOI: 10.1007/s11248-021-00249-8
Keywords
COVID-19; ACE2; Transgenes; SARS-CoV-2; Tamoxifen; Cre-recombinase
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Funding
- Ministry of Science and Higher Education of the Russian Federation [075-15-2019-1661]
- Institute of functional genomics of the Lomonosov Moscow State University
- Belgorod Scientific and Educational Center Innovative Solutions in the Agro-Industrial Complex''
- Ministry of Science and Higher Education of the Russian Federation
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This study reports a humanized mouse model that can be used for studying the pathogenesis of COVID-19 and conducting preclinical trials of antiviral drugs and vaccines by selectively expressing hACE2.
The current coronavirus disease (COVID-19) pandemic remains one of the most serious public health problems. Increasing evidence shows that infection by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) causes a very complex and multifaceted disease that requires detailed study. Nevertheless, experimental research on COVID-19 remains challenging due to the lack of appropriate animal models. Herein, we report novel humanized mice with Cre-dependent expression of hACE2, the main entry receptor of SARS-CoV-2. These mice carry hACE2 and GFP transgenes floxed by the STOP cassette, allowing them to be used as breeders for the creation of animals with tissue-specific coexpression of hACE2 and GFP. Moreover, inducible expression of hACE2 makes this line biosafe, whereas coexpression with GFP simplifies the detection of transgene-expressing cells. In our study, we tested our line by crossing with Ubi-Cre mice, characterized by tamoxifen-dependent ubiquitous activation of Cre recombinase. After tamoxifen administration, the copy number of the STOP cassette was decreased, and the offspring expressed hACE2 and GFP, confirming the efficiency of our system. We believe that our model can be a useful tool for studying COVID-19 pathogenesis because the selective expression of hACE2 can shed light on the roles of different tissues in SARS-CoV-2-associated complications. Obviously, it can also be used for preclinical trials of antiviral drugs and new vaccines.
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