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SARS-CoV-2 infection of human ACE2-transgenic mice causes severe lung inflammation and impaired function
Open accessAbstract
Although animal models have been evaluated for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, none have fully recapitulated the lung disease phenotypes seen in humans who have been hospitalized. Here, we evaluate transgenic mice expressing the human angiotensin I-converting enzyme 2 (ACE2) receptor driven by the cytokeratin-18 (K18) gene promoter (K18-hACE2) as a model of SARS-CoV-2 infection. Intranasal inoculation of SARS-CoV-2 in K18-hACE2 mice results in high levels of viral infection in lungs, with spread to other organs. A decline in pulmonary function occurs 4 days after peak viral titer and correlates with infiltration of monocytes, neutrophils and activated T cells. SARS-CoV-2-infected lung tissues show a massively upregulated innate immune response with signatures of nuclear factor-κB-dependent, type I and II interferon signaling, and leukocyte activation pathways. Thus, the K18-hACE2 model of SARS-CoV-2 infection shares many features of severe COVID-19 infection and can be used to define the basis of lung disease and test immune and antiviral-based countermeasures.
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“In a humanized transgenic mouse model, ACE2 was expressed in the heart and virus replication detected, but they did not observe cardiac inflammation. 181”
From COVID-19, Myocarditis and Pericarditis (2023) · cites this paper as [181]
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“These transgenic mice have a human ACE2 receptor which is the major cell entry receptor for SARS-CoV-216,17.”
From Efficacy of an unmodified bivalent mRNA vaccine against SARS-CoV-2 variants in female small animal models (2023) · cites this paper as [17]
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“S1, http:// links.lww.com/CCX/B479), consistent with reports by others (22–26).”
Liu, Y., Chen, Z., Li, Y., Gan, C., Tang, J., Zheng, Z., Ye, J., Valencia, C. A., Chow, H. Y., & Dong, B. (2025) · BMC Biotechnology · doi:10.1186/s12896-025-01016-x · Cited by 1
“Therefore, the BALB/c mice should be replaced with the humanized ACE2 mice or other animal models with higher Spike-ACE2 binding affinity to more accurately evaluate the immunogenicity and protective efficacy of SARS-CoV-2 VLPs [40, 41].”
Lin, C., Lin, M., Yang, X., Chiang, H.-H., Wu, T.-H., Tsai, C.-H., & Lin, C. (2025) · Analytica Chimica Acta · doi:10.1016/j.aca.2025.344623 · Cited by 1
Epitope-focused discovery of SARS-CoV-2 antibodies that potently neutralize Omicron variants
Zost, S. J., Suryadevara, N., Williamson, L. E., Scheaffer, S. M., Binshtein, E., Buchman, C. D., Johnson, N. V., Catanzaro, N., Ravera, S., Chapman, N. S., et al. (2026) · Nature Microbiology · doi:10.1038/s41564-026-02282-x · Cited by 3
“We next tested COV2-3872, -3892, -3967 and -4094 for in vivo protection in a SARS-CoV-2 XBB.1.5 mouse model using K18/hACE2 transgenic mice 30,31 .”
InfluentialSelf-citationMild SARS-CoV-2 maternal infection in mice induces transient offspring neurodevelopmental aberrance
Tung, W., Yuen, M., Cai, H., Cho, H., Lu, P., Kliman, H. J., Homer, R., Herrerias, A., Salla, N., Rivera, A. R., et al. (2026) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.2518294123 · Cited by 1
“Of note, a previous research group utilized a knock - in mouse model replacing mouse ACE2 with human ACE2 to explore the consequences of prenatal infection on neurodevelopment.”
InfluentialExploring coronavirus cell entry with functional viromics
Jefferson, V. A., Endlich-Frazier, A., & Letko, M. C. (2026) · Journal of Virology · doi:10.1128/jvi.01728-25 · Cited by 1
de Almeida, A. L. T., da Silva, A. M. V., Souza, M. M. E., Rodrigues, M. T., Coelho, F. S., da Rosa, L. C., Azamor, T., Várady, C. B. S., da Silva, B. J. D., de Almeida, A. C., et al. (2026) · Microorganisms · doi:10.3390/microorganisms14040852 · Cited by 1
“In this study, mice exhibited a typical cytokine storm in the lungs at two days post-infection; however, by seven days post-infection, there was a downregulation of chemokines and pro-inflammatory cytokines, coinciding with impaired pulmonary function [52].”
Botta, D., Schultz, M. D., Silva-Sánchez, A., Kalange, D., Akther, J., Zhou, F., Tipper, J. L., Yang, G., Schaefers, L., Barkley, C. A., et al. (2026) · Vaccines · doi:10.3390/vaccines14050399 · Cited by 1
Marcos-Villar, L., Perdiguero, B., Sin, L., Álvarez, E., Flores, S., Casasnovas, J. M., Pons, T., Sorzano, C. Ó. S., del Hoyo, D., Lapuhs, P., et al. (2026) · Frontiers in Immunology · doi:10.3389/fimmu.2026.1787877 · Cited by 1
Yoon, G. Y., Chung, Y. C., Choi, J. H., Ha, Y., Seo, S. Y., Ku, K. B., Kim, D. Y., Hwang, W. Y., Jeong, G. U., Ahn, D., et al. (2026) · Journal of Neuroinflammation · doi:10.1186/s12974-026-03842-y · Cited by 1
Singh, M., Yu, J., Vanmierlo, T., Mulder, M. T., Paul, S. M., & Cashikar, A. G. (2026) · Biomedicine & Pharmacotherapy · doi:10.1016/j.biopha.2026.119506 · Cited by 1
Self-citationAngelim, M. K. S. C., Rodrigues, P. B., Campos, A. T. P., Gomes, G. F., de Souza, G. F., Matheus, V. A., Cesar, C. L., Proença‐Módena, J. L., Vinolo, M. A. R., & Moraes-Vieira, P. M. (2026) · Immunity Inflammation and Disease · doi:10.1002/iid3.70457 · Cited by 1
“Studies have shown that infection with these variants reliably re-produces many aspects of the respiratory disease observed in humans [9, 15, 16].”
Gone but not forgotten: lung infection history shapes future respiratory immunity
Dirlam, A., Iliakis, C. S., & Wack, A. (2026) · Mucosal Immunology · doi:10.1016/j.mucimm.2026.100386 · Cited by 1
Yuan, X., Kim, J., Figarella, K., Wang, Y., Makarevich, O. D., Ruan, W., Hu, Y., Xie, X., Mills, T. W., Karmouty‐Quintana, H., et al. (2026) · Anesthesiology · doi:10.1097/aln.0000000000006306 · Cited by 1
Advances in Modelling COVID-19 in Animals
Nickl, P., Raishbrook, M. J., Syding, L. A., & Sedláček, R. (2022) · Frontiers in Drug Discovery · doi:10.3389/fddsv.2022.899587 · Cited by 1
Shipaeva, E., Filon, O., Zintchenko, A., Shipunov, G., Dmitrieva, A., Lemak, M., Grishin, S., Trofimets, E. I., Kryshen, K., Kozlovskaya, L., et al. (2022) · Biological Products. Prevention, Diagnosis, Treatment · doi:10.30895/2221-996x-2022-22-4-414-434
Blood brain barrier disruption following COVID-19 infection and neurological manifestations
Deshwal, S., Dhiman, N., & Sandhir, R. (2023) · Elsevier eBooks · doi:10.1016/b978-0-443-15256-6.00005-2 · Cited by 1
Huang, J., Fang, Z., Wu, X., Xia, L., Liu, Y., Wang, J., Su, Y., Xu, D., Zhang, K., Xie, Q., et al. (2024) · APOPTOSIS · doi:10.1007/s10495-024-01942-9 · Cited by 1
“Interestingly, the module enrichment showed decreased leukocyte chemotaxis and myeloid leukocyte migration in CGCs, possibly due to the immune cell recruitment to other direct infection sites (such as lungs) [62].”
Immune Cells Are Differentially Affected by SARS-CoV-2 Viral Loads in K18-hACE2 Mice
Kim, J. A., Kim, S.-H., Kim, J. J., Noh, H., Lee, S.-B., Jeong, H., Kim, J., Jeon, D., Seo, J. S., On, D., et al. (2024) · Immune Network · doi:10.4110/in.2024.24.e7 · Cited by 1
Sun, H., Liu, K., Yu, B., Zhu, M., Jia, L., Yao, W., Chen, Z., Hao, H., Zhang, X., Liu, Y., et al. (2024) · Journal of Medical Virology · doi:10.1002/jmv.70049 · Cited by 1
Repurposing of lonafarnib as a treatment for SARS-CoV-2 infection
Khan, M., Irvin, P., Park, S. B., Ivester, H. M., Ricardo-Lax, I., Leek, M., Grieshaber, A., Jang, E. S., Coutermarsh‐Ott, S. L., Zhang, Q., et al. (2024) · JCI Insight · doi:10.1172/jci.insight.182704 · Cited by 1
Dandotiya, J., Adhikari, N., Tripathy, M. R., Jakhar, K., Sonar, S., Pati, D. R., Kanchan, V., Prasad, V. S., Kumar, J., Senapati, N. K., et al. (2025) · Frontiers in Immunology · doi:10.3389/fimmu.2024.1447962 · Cited by 1
Regorafenib as a potential drug for severe COVID ‐19: inhibition of inflammasome activation in mice
Jeong, J. H., Kim, S., Min, S. C., Kim, E., Song, M., & Shin, E. (2025) · FEBS Open Bio · doi:10.1002/2211-5463.70002 · Cited by 1
Nunes, B. B. D. S., Mendonça, J. D. S., Matos, S. G. D. S., Rodrigues, A. S. D. L., Pádua, B. D. C., da Luz, T. M., & Malafaia, G. (2025) · Neurotoxicology and Teratology · doi:10.1016/j.ntt.2025.107451 · Cited by 2
Luisetto, M., Rafa, A. Y., Naeem, M., Syed, M. A., Anan, S. I., & Tazwan, H. (2020) · Insights in Biology and Medicine · doi:10.29328/journal.ibm.1001018 · Cited by 1
“Consequently, lungs get most infected by SARS-CoV-2 infection and penetration in the human body [7].”
BackgroundMelamed, S., Politi, B., Grauer, E., Achdout, H., Aftalion, M., Gur, D., Tamir, H., Yahalom-Ronen, Y., Maimon, S., Yitzhak, E., et al. (2021) · Frontiers in Bioengineering and Biotechnology · doi:10.3389/fbioe.2021.737627 · Cited by 1
Angiotensin-converting enzyme 2: virus accomplice or host defender?
Wang, J., Chang, H., Qiao, Y., Sun, H., Li, X., Yuan, S., Zhang, S., & Shan, C. (2023) · Journal of Bio-X Research · doi:10.1097/jbr.0000000000000150 · Cited by 1
“[25,26] Consistent with previous reports, [27] we analyzed the RNA sequencing results in a published article [28] and found that glucose metabolism was promoted in mouse lung tissue infected with SARS-CoV-2 (Fig.”
ResultRani, S., Madhumitha, B., Beelagi, M. S., Indrabalan, U. B., Mamathashree, M. N., Chandrashekar, S., Sk, K., Hemadri, D., Patil, S. S., & Suresh, K. (2022) · Journal of Ayurvedic and Herbal Medicine · doi:10.31254/jahm.2022.8401 · Cited by 1
“ACE2 is a zinc-containing type I membrane enzyme found on the surface of endothelial cells in the lungs, as well as other cell types and organs resulting in damage, inflammation, and respiratory distress [14,11] .”
BackgroundA Trans-Complementation System for SARS-CoV-2Preprint
Zhang, X., Liu, Y., Liu, J., Bailey, A. L., Plante, K. S., Plante, J. A., Zou, J., Xia, H., Bopp, N., Aguilar, P., et al. (2021) · SSRN Electronic Journal · doi:10.2139/ssrn.3770930 · Cited by 1
Self-citationBiswas, R., Eaker, S. S., Soni, D. K., Kar, S., LoBato, D. N., & Culiat, C. T. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.02.08.430254 · Cited by 1
“8 X 10(4) pfu), but resulted in the same rapid weight loss, behavioral and mortality phenotypes; hence, this treatment regimen is sufficient for generating clinically relevant disease features in hACE2 tg mice.(45) This pilot study was designed to examine if NV1 treatment of SARS-CoV-2 infected hACE2 mice increased su…”
BackgroundMethodResultInfluentialDriving potent neutralization of a SARS-CoV-2 Variant of Concern with a heterotypic boostPreprint
Sheward, D. J., Mandolesi, M., Urgard, E., Kim, C., Hanke, L., Vidakovics, L. P., Pankow, A. P., Smith, N. L., Dopico, X. C., McInerney, G. M., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.04.03.438330 · Cited by 1
Wagner, T. R., Schnepf, D., Beer, J., Klingel, K., Ruétalo, N., Kaiser, P. D., Junker, D., Sauter, M., Traenkle, B., Frecot, D. I., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.08.08.455562 · Cited by 1
Cui, Z., Zeng, C., Huang, F., Yuan, F., Yan, J., Zhao, Y., Huang, J., Staats, H. F., Everitt, J. I., Sempowski, G. D., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.10.03.462915 · Cited by 1
Nasal prevention of SARS-CoV-2 infection by intranasal influenza-based boost vaccinationPreprint
Zhou, R., Wang, P., Wong, Y.-C., Xu, H., Lau, S.-Y., Liu, L., Mok, B. W.-Y., Peng, Q., Liu, N., Woo, K. F., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.10.21.465252 · Cited by 1
Pardieck, I. N., van der Gracht, E. T. I., Veerkamp, D. M. B., Behr, F. M., van Duikeren, S., Beyrend, G., Rip, J., Nadafi, R., van der Sluis, T. C., Nejad, E. B., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.12.15.472838 · Cited by 1
Ebenig, A., Muraleedharan, S., Kazmierski, J., Tödt, D., Auste, A., Anzaghe, M., Gömer, A., Postmus, D., Gogesch, P., Niles, M. A., et al. (2021) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2021.12.28.474359 · Cited by 1
“While transgenic K18-ACE2 are no doubt useful for studying protection by vaccines, antibodies or antivirals against an exaggerated generalized form of the disease (Winkler et al., 2020), the predictability of the CoV-receptor transgenic mouse model for disease course in human patients seems somewhat questionable, espe…”
BackgroundMann, B. J., Chhabra, P., Ma, M., Brovero, S. G., Jones, M., Linden, J. M., & Brayman, K. L. (2022) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2022.02.25.481997 · Cited by 1
Vectored Immunoprophylaxis and Treatment of SARS-CoV-2 InfectionPreprint
Tada, T., Dcosta, B. M., Minnee, J., & Landau, N. R. (2023) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2023.01.11.523649 · Cited by 1
SARS-CoV-2 infection leads to Tau pathological signature in neuronsPreprint
Primio, C. D., Quaranta, P., Mignanelli, M., Siano, G., Bimbati, M., Piazza, C. R., Spezia, P. G., Perrera, P., Basolo, F., Poma, A. M., et al. (2023) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2023.05.17.541098 · Cited by 1
The assembly of neutrophil inflammasomes during COVID-19 is mediated by type I interferonsPreprint
Cabrera, L. E., Jokiranta, S. T., Mäki, S., Miettinen, S., Kant, R., Kareinen, L., Sironen, T. A., Pietilä, J.-P., Kantele, A., Kekäläinen, E., et al. (2023) · medRxiv · doi:10.1101/2023.09.07.23295190 · Cited by 1
da Silva, J. L., Kersten, V., Dati, L. M. M., Lins, B. B., Tozzeto-Mendoza, T. R., Rodrigues, D. D. R. F., Vianna-Barbosa, R. J., Lima, S. H., Boas, L. S. V., da Silva, A. D. S., et al. (2024) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2024.05.29.596469 · Cited by 1
Fantin, R. F., Clark, J. J., Cohn, H., Jaiswal, D., Bozarth, B., Civljak, A., Rao, V., Lobo, I., Nardulli, J., Srivastava, K., et al. (2024) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2024.07.15.602781 · Cited by 1
Neck, S. D., Penrice-Randal, R., Neves, L. X., Seehusen, F., Sharma, P., Helminger, B., Kirby, A., Mega, D., Erdmann, M., Zanella, M., et al. (2025) · bioRxiv (Cold Spring Harbor Laboratory) · doi:10.1101/2025.02.07.637145 · Cited by 1
Metadata
- Authors
- Winkler, E. S., Bailey, A. L., Kafai, N. M., Nair, S., McCune, B. T., Yu, J., Fox, J. M., Chen, R. E., Earnest, J. T., Keeler, S. P., Ritter, J. H., Kang, L.-I., Dort, S., Robichaud, A., Head, R., Holtzman, M. J., & Diamond, M. S.
- Affiliations
- Washington University in St. Louis (US)
- Corresponding author
- Diamond, Michael S.
- ORCID
- Venue
- Nature Immunology
- Published
- 2020-08-24
- Volume
- 21
- Issue
- 11
- Pages
- 1327-1335
- ISSN
- 1529-2908 (ISSN-L)
- 1529-2916
- PMC
- PMC7578095
- OpenAlex
- W3080378920
- Cited by
- 901
- References
- 56
- Citations by year
- 2026: 55 · 2025: 72 · 2024: 124 · 2023: 131 · 2022: 234 · 2021: 252 · 2020: 32
- FWCI
- 21.20
- Type
- journal article
- Language
- en
- Update notices
- correction (2020-09-02)
- Open access
- bronze
- doi.org
- Locations
- Nature Immunology (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- U.S. Department of Health & Human Services | NIH | National Institute of Allergy and Infectious Diseases (75N93019C00062, R01 AI127828, R01 AI130591, R35 HL145242, F32 AI138392)
- United States Department of Defense | Defense Advanced Research Projects Agency (HR001117S0019)
- Topics
- Health Sciences › Medicine › Infectious Diseases › SARS-CoV-2 and COVID-19 Research
- Health Sciences › Medicine › Infectious Diseases › COVID-19 Clinical Research Studies
- Life Sciences › Immunology and Microbiology › Immunology › interferon and immune responses
- Keywords
- SARS-CoV-2, COVID-19 pandemic, K18-hACE2 mice, animal model of COVID-19, lung inflammation, lung function decline, monocytes, neutrophils, T cell activation, innate immune response, interferon signaling, NF-κB signaling
- MeSH terms
- Betacoronavirus, Angiotensin-Converting Enzyme 2, COVID-19, SARS-CoV-2, Animals, Chlorocebus aethiops, Disease Models, Animal, Female, Humans, Immunity, Innate, Interferon Type I, Interferon-gamma, Peptidyl-Dipeptidase A, Leukocytes, Lymphocyte Activation, Male, Mice, Transgenic, Monocytes, Neutrophils, Pneumonia, Pneumonia, Viral, Promoter Regions, Genetic, T-Lymphocytes, Vero Cells, Virus Replication, NF-kappa B, Coronavirus Infections, Neutrophil Infiltration, Mice, Keratin-18, Pandemics
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