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Vol 56(2022) N 5 p. 705-712; DOI 10.1134/S0026893322050065 Full Text

D.V. Glazkova1, E.V. Bogoslovskaya1, F.A. Urusov1,2*, N.P. Kartashova3, E.A. Glubokova3, A.V. Gracheva3, E.B. Faizuloev3, G.V. Trunova4, V.A. Khokhlova4, O.A. Bezborodova4, A.A. Pankratov4, I.A. Leneva3, G.A. Shipulin1

Generation of SARS-CoV-2 Mouse Model by Transient Expression of the Human ACE2 Gene Mediated by Intranasal Administration of AAV-hACE2

1Center for Strategic Planning and Management of Medical and Biological Health Risks, Federal Medical-Biological Agency of the Russian Federation, Moscow, 119992 Russia
2Izmerov Research Institute of Occupational Health, Moscow, 105275 Russia
3Mechnikov Research Institute of Vaccines and Sera, Moscow, 105064 Russia
4National Medical Research Radiological Centre, Ministry of Health of the Russian Federation, Moscow, 125284 Russia

*flanger.fx@mail.ru
Received - 2022-01-25; Revised - 2022-04-08; Accepted - 2022-04-12

One of the most important steps in the development of drugs and vaccines against a new coronavirus infection is their testing on a relevant animal model. The laboratory mouse, with well-studied immunology, is the preferred mammalian model in experimental medicine. However, mice are not susceptible to infection with SARS-CoV-2 due to the lack of human angiotensin-converting enzyme (hACE2), which is the cell receptor of SARS-CoV-2 and necessary for the entry of the virus into the cell. In present work, it was shown that intranasal administration of the adeno-associated vectors AAV9 and AAV-DJ encoding the hACE2 provided a high level of expression of ACE2 gene in the lungs of mice. In contrast, the introduction of the AAV6 vector led to a low level ACE2 expression. Infection with SARS-CoV-2 of mice expressing hACE2 in the lungs led to virus replication and development of bronchopneumonia on the 7th day after infection. Thus, a simple method for delivering the human ACE2 gene to mouse lungs by intranasal administration of the AAV vector has been proposed. This approach enabled rapid generation of mouse model for studying coronavirus infection.

hACE2, SARS-CoV-2, AAV9, AAV6, AAV-DJ, BALB/c mice



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