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Null Function of Npr1 Disturbs Immune Response in Colonic Inflammation During Early Postnatal Stage. Inflammation 2022; 45:2419-2432. [PMID: 35794311 PMCID: PMC9646613 DOI: 10.1007/s10753-022-01702-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/01/2022] [Accepted: 06/06/2022] [Indexed: 12/24/2022]
Abstract
Natriuretic peptide receptor 1 (NPR1) is conventionally known as a regulator of vascular homeostasis. Here, we generated an Npr1 knockout mouse model with CRISPR/Cas9 technology and found that homozygous mice (Npr1−/−) exhibited weight loss and poor survival rate during early postnatal stage. Careful examination revealed unexpectedly that Npr1−/− mice developed colitis characterized by shortened colon, evident colonic mucosal damage, increased histopathological score, and higher colonic expression of proinflammatory cytokines interleukin-1B (IL1B) and -6 (IL6). RNA-sequencing analysis revealed that differentially expressed genes were prominently enriched in the biological pathways related to immune response in both spleen and colon of Npr1−/− mice. Cytofluorimetric analysis demonstrated that leukocytes in the spleen were significantly increased, particularly, the populations of neutrophil and CD3+ T cell were elevated but CD4+ T cells were decreased in Npr1−/− mice. Administration of 8-Br-cGMP, a downstream activator of NPR1, restored these immune-cell populations disturbed in Npr1−/− mice and lessened the colitis-related phenotypes. To validate the involvement of Npr1 in colitis, we examined another mouse model induced by dextran sodium sulfate (DSS) and found a decreased Npr1 expression and shifted immune-cell populations as well. Importantly, 8-Br-cGMP treatment exhibited a similar effect in the restoration of immune-cell populations and attenuation of colonic inflammation in DSS mice. Our data indicate that loss of Npr1 possibly interrupts immune response, which is critical to the pathogenesis of colitis in the early life.
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Kubekina MV, Silaeva YY, Bruter AV, Korshunova DS, Ilchuk LA, Okulova YD, Soldatova MO, Seryogina E, Kolesnik IM, Ukolova PA, Korokin MV, Deykin AV. Transgenic mice Cre-dependently expressing mutant polymerase-gamma: novel test-system for pharmacological study of mitoprotective drugs. RESEARCH RESULTS IN PHARMACOLOGY 2021. [DOI: 10.3897/rrpharmacology.7.72784] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Introduction: PolG-alpha is a nuclear-encoded enzyme which provides replication and repair of mitochondrial DNA. D257A mutation of PolG-alpha leads to change in the N-terminal ”proofreading” domain, which deprives the enzyme of 3′-5′ exonuclease activity, resulting in accumulation of mutations in the mitochondrial genome.
Materials and methods: Murine zygotes were microinjected with transgene construction carrying mutant murine Polg coding sequence and GFP coding sequence by a loxP-flanked STOP-cassette. Two Cre-activator strains, CMV-Cre (systemic activation) and Tie2-Cre (endothelial activation), were used for activation of the transgene. To confirm the insertion and Cre-dependent activation of the transgene, genotyping and qPCR copy number measurement of mutant Polg were performed, and GFP fluorescence was assessed.
Results: Two primary transgenic animals were used as the founders for two lines with copy numbers of transgene ~7 and ~5. After systemic activation, the number of the transgene copies decreases to ~1.0 while endothelial specific activation does not affect the number of transgene copies in tail tissue.
Discussion: A murine model with spatial control of mutant Polg expression has been developed. To our knowledge, this is the first transgenic model of tissue-specific mitochondrial dysfunction.
Conclusion: Transgenic mice Cre-dependent expressing mutant polymerase-gamma are a novel test-system for studying mitochondrial biology and efficacy of mitoprotective drugs.
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Bruter AV, Korshunova DS, Kubekina MV, Sergiev PV, Kalinina AA, Ilchuk LA, Silaeva YY, Korshunov EN, Soldatov VO, Deykin AV. Novel transgenic mice with Cre-dependent co-expression of GFP and human ACE2: a safe tool for study of COVID-19 pathogenesis. Transgenic Res 2021; 30:10.1007/s11248-021-00249-8. [PMID: 33855640 PMCID: PMC8045570 DOI: 10.1007/s11248-021-00249-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Accepted: 03/26/2021] [Indexed: 12/22/2022]
Abstract
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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Affiliation(s)
- Alexandra V. Bruter
- Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
| | - Diana S. Korshunova
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
| | - Marina V. Kubekina
- Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
| | - Petr V. Sergiev
- Institute of Functional Genomics, Lomonosov Moscow State University, Moscow, Russian Federation 119991
| | - Anastasiia A. Kalinina
- Federal State Budgetary Institution “N. N. Blokhin National Medical Research Center of Oncology”, Ministry of Health of the Russian Federation, Kashirskoe sh. 24, Moscow, Russian Federation 115478
| | - Leonid A. Ilchuk
- Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
| | - Yuliya Yu. Silaeva
- Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
| | - Eugenii N. Korshunov
- Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
| | - Vladislav O. Soldatov
- Core Facility Centre, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
- Laboratory of Genome Editing for Veterinary and Biomedicine, Belgorod State National Research University, 85, Pobedy St., Belgorod, Belgorod region Russian Federation 308015
| | - Alexey V. Deykin
- Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Institute of Gene Biology, Russian Academy of Sciences, Vavilova st. 34/5, Moscow, Russian Federation 119334
- Laboratory of Genome Editing for Veterinary and Biomedicine, Belgorod State National Research University, 85, Pobedy St., Belgorod, Belgorod region Russian Federation 308015
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Puchenkova OA, Nadezhdin SV, Soldatov VO, Zhuchenko MA, Korshunova DS, Kubekina MV, Korshunov EN, Korokina LV, Golubinskaya PA, Kulikov AL, Gureev VV, Pokrovskiy VM, Patrakhanov EA, Lebedev PR, Denisyuk TA, Belyaeva VS, Movchan EA, Lepetukha EI, Pokrovskiy MV. STUDY OF ANTIATHEROSCLEROTIC AND ENDOTHELIOPROTECTIVE ACTIVITY OF PEPTIDE AGONISTS OF EPOR/CD131 HETERORECEPTOR. PHARMACY & PHARMACOLOGY 2020. [DOI: 10.19163/2307-9266-2020-8-2-100-111] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Introduction. The drugs affecting a mitochondrial dysfunction, oxidative stresses, apoptosis and inflammation of the vascular wall, have a high potential for the prevention and treatment of atherosclerotic lesions. In this regard, the use of EPOR/CD131 heteroreceptor agonists which have a similar spectrum of pharmacological effects, is one of the promising strategies in the treatment of cardiovascular diseases.Materials and Methods. The study was carried out on 68 C57Bl/6J male mice. Atherosclerosis was simulated in transgenic animals with an endotheliospecific knockdown of the Polg gene by simulating a balloon injury and keeping on a Western diet. Then, the studied drugs were injected once every 3 days at the dose of 20 μg/kg for 27 days. On the 28-th day, the animals were euthanized and the area of atherosclerotic plaques was assessed. The gene expression associated with the processes of inflammation, antioxidant protection, apoptosis, and angiogenesis was also determined in the aortic tissues. In addition, the endothelium protective effect of peptides on primary cultures of endothelial cells of wild and transgenic Polg-D257A mice was studied.Results. No statistically significant effect of drugs on the area of lipid infiltration have been found. However, the studied peptides have significantly reduced the expression of proinflammatory genes (iNos, Icam1, Vcam1, Sele, Il6, Tnfa), the genes associated with angiogenesis (Vegfa, Kdr, and Hif1a), the expression of proapoptic factors; they decreased the Bax/Bcl-2 ratio by more than 1.5 times. In addition, when supplemented with H2 O2 in vitro, peptides dose-dependently increased endothelial cell survival.Conclusion. The erythropoietin-based peptides can be used to improve the functional state of the vascular wall against the background of atherosclerotic lesions and have a depressing effect on pathobiological processes associated with a mitochondrial dysfunction. In addition, the studied peptides have a significant endothelial protective effect in the induction of oxidative stress in vitro.
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Affiliation(s)
| | | | - Vladislav O. Soldatov
- Federal Publicly Funded Institution of Science “Institute of Gene Biology of the Russian Academy of Sciences”
| | - Maxim A. Zhuchenko
- Russian Research Center “Kurchatov Institute” – State Science Research Institute of Genetics
| | - Diana S. Korshunova
- Federal Publicly Funded Institution of Science “Institute of Gene Biology of the Russian Academy of Sciences”
| | - Marina V. Kubekina
- Federal Publicly Funded Institution of Science “Institute of Gene Biology of the Russian Academy of Sciences”
| | - Evgeny N. Korshunov
- Federal Publicly Funded Institution of Science “Institute of Gene Biology of the Russian Academy of Sciences”
| | | | - Polina A. Golubinskaya
- Clinical diagnostic laboratory, Budgetary institution of public healthcare of the Voronezh Region “Voronezh Regional Clinical Ophthalmological Hospital”
| | | | | | | | | | | | - Tatyana A. Denisyuk
- Federal State Budgetary Educational Institution of Higher Education “Kursk State Medical University”
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Soldatov VO, Kubekina MV, Silaeva YY, Bruter AV, Deykin AV. On the way from SARS-CoV-sensitive mice to murine COVID-19 model. RESEARCH RESULTS IN PHARMACOLOGY 2020. [DOI: 10.3897/rrpharmacology.6.53633] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The coronavirus disease 2019 (COVID-19) is a master killer which appeared suddenly and which has already claimed more than 200,000 human lives. In this situation, laboratories are in urgent need for a COVID-19 murine model to search for effective antiviral compounds. Here we propose a novel strategy for the development of mice that can be inoculated by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the COVID-19 causative agent. In humans, two proteins – ACE2 and TMPRSS2 – are involved in SARS-CoV-2 cells entry and, thus, we decided to introduce their genes into a murine genome. These genes will be placed with LoxP sites under the murine Tmprss2 promoter. Such an approach can provide a representative model with the opportunity to control the viral sensitivity of an animal population and tissue specificity of hACE2 and hTMPRSS2 expression.
Graphical abstract
The new COVID-19 model should be based on inducible co-expression of the human ACE2 and TMPRSS2 genes. Activation of ACE2 and TMPRSS2 genes will occur only in the virological laboratory, after crossbreeding with Cre-mice. Before activation, mice will be resistant to SARS-CoV-2 for their biological safety during the pandemic.
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Drutskaya MS, Gogoleva VS, Atretkhany KSN, Gubernatorova EO, Zvartsev RV, Nosenko MA, Nedospasov SA. Proinflammatory and Immunoregulatory Functions of Interleukin 6 as Identified by Reverse Genetics. Mol Biol 2018. [DOI: 10.1134/s0026893318060055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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