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Oltean T, Maelfait J, Saelens X, Vandenabeele P. Need for standardization of Influenza A virus-induced cell death in vivo to improve consistency of inter-laboratory research findings. Cell Death Discov 2024; 10:247. [PMID: 38778049 PMCID: PMC11111761 DOI: 10.1038/s41420-024-01981-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 04/16/2024] [Accepted: 04/19/2024] [Indexed: 05/25/2024] Open
Abstract
The involvement of necroptosis in the control of influenza A virus (IAV) infection has been reported in multiple studies. Downstream of the nucleic acid sensor ZBP1, RIPK3 kinase activity is critically involved in the induction of necroptotic cell death by phosphorylating MLKL, while RIPK3 as a scaffold can induce apoptosis. Paradoxically, RIPK3-deficiency of mice may result in increased or decreased susceptibility to IAV infection. Here, we critically review the published reports on the involvement of RIPK3 in IAV infection susceptibility and try to identify differences in experimental settings that could explain seemingly conflicting outcomes. Analysis of the experimental reports revealed differences in the IAV challenge dose, the IAV inoculum preparation, IAV titer assessment, as well as the route of inoculation between studies. Furthermore, differences were noticed in the inclusion of littermate controls, which show high variance in viral sensitivity. Our evaluation argues for a standardized setup for IAV infection experiments including the preparation of the IAV virus, the use of different IAV infectious doses description and the proper experimental genetic controls of the mouse strains to increase inter-laboratory consistency in this field. Workflow for IAV infection studies in vivo: Viral preparation and titer assessment should be as standardized as possible with the use of a universal repository (such as BEI resources). Infection studies in genetically modified mice and littermate controls should include dose-response experimentation, following a defined infection route and inoculation volume. Data are generated by consistent analysis methods.
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Affiliation(s)
- Teodora Oltean
- VIB Center for Inflammation Research, Cell Death and Inflammation Unit, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Jonathan Maelfait
- VIB Center for Inflammation Research, Cell Death and Inflammation Unit, Ghent, Belgium
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - Xavier Saelens
- VIB Center for Medical Biotechnology, Ghent, Belgium
- Department of Biochemistry and Microbiology, Ghent University, Ghent, Belgium
| | - Peter Vandenabeele
- VIB Center for Inflammation Research, Cell Death and Inflammation Unit, Ghent, Belgium.
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium.
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2
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Poester VR, Munhoz LS, Trápaga MR, Esperon BM, Stevens DA, Xavier MO. Humane Endpoint: Example from a Murine Model of Disseminated Sporotrichosis. Curr Microbiol 2024; 81:175. [PMID: 38755455 DOI: 10.1007/s00284-024-03692-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 04/07/2024] [Indexed: 05/18/2024]
Abstract
Vertebrate animal models are essential in research; however, efforts need to be made to decrease animal suffering as much as possible. It could be useful to determine humane endpoints that could serve as surrogates for a fatal outcome. We address this issue with respect to infectious diseases. We propose a humane endpoint for studies of Sporothrix brasiliensis infection. BALB/c mice were inoculated subcutaneously in the footpad. To define a humane endpoint, we considered two groups: animals who died during the experiment, and those euthanized at the end of the experiment. The groups were compared for colony-forming units (CFU) in internal organs, clinical condition, and body weight. Thirteen (22%) animals died before the end of the experiment due to the progression of local infection to severe and disseminated sporotrichosis. Analyzing data of the groups, we propose the following future criteria for euthanasia as a humane endpoint: neurological impairment OR necrosis of the footpad OR loss of ≥ 20% body weight AND moderate to severe dehydration. In view of the current global epidemiological impact of zoonotic sporotrichosis caused by S. brasiliensis, our data could facilitate the utility of models used to study the disease, particularly therapy.
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Affiliation(s)
- Vanice Rodrigues Poester
- Programa de Pós-Graduação Em Ciências da Saúde, Faculdade de Medicina (FAMED), Universidade Federal Do Rio Grande (FURG), Rio Grande, Rio Grande do Sul (RS), Brazil.
- Laboratório de Micologia, Faculdade de Medicina, Universidade Federal Do Rio Grande, Campus Saúde. Visconde de Paranaguá 102, Centro, Rio Grande, RS, 96201-900, Brasil.
| | - Lívia Silveira Munhoz
- Programa de Pós-Graduação Em Ciências da Saúde, Faculdade de Medicina (FAMED), Universidade Federal Do Rio Grande (FURG), Rio Grande, Rio Grande do Sul (RS), Brazil
- Laboratório de Micologia, Faculdade de Medicina, Universidade Federal Do Rio Grande, Campus Saúde. Visconde de Paranaguá 102, Centro, Rio Grande, RS, 96201-900, Brasil
| | - Mariana Rodrigues Trápaga
- Programa de Pós-Graduação Em Ciências da Saúde, Faculdade de Medicina (FAMED), Universidade Federal Do Rio Grande (FURG), Rio Grande, Rio Grande do Sul (RS), Brazil
- Laboratório de Micologia, Faculdade de Medicina, Universidade Federal Do Rio Grande, Campus Saúde. Visconde de Paranaguá 102, Centro, Rio Grande, RS, 96201-900, Brasil
| | - Bruna Muradás Esperon
- Programa de Pós-Graduação Em Ciências da Saúde, Faculdade de Medicina (FAMED), Universidade Federal Do Rio Grande (FURG), Rio Grande, Rio Grande do Sul (RS), Brazil
- Laboratório de Micologia, Faculdade de Medicina, Universidade Federal Do Rio Grande, Campus Saúde. Visconde de Paranaguá 102, Centro, Rio Grande, RS, 96201-900, Brasil
| | - David A Stevens
- California Institute for Medical Research, San Jose, USA.
- Division of Infectious Diseases and Geographic Medicine, Stanford University Medical School, Stanford, USA.
- Foundation for Research in Infectious Diseases, P.O. Box 2734, Saratoga, 95070, USA.
| | - Melissa Orzechowski Xavier
- Programa de Pós-Graduação Em Ciências da Saúde, Faculdade de Medicina (FAMED), Universidade Federal Do Rio Grande (FURG), Rio Grande, Rio Grande do Sul (RS), Brazil.
- Laboratório de Micologia, Faculdade de Medicina, Universidade Federal Do Rio Grande, Campus Saúde. Visconde de Paranaguá 102, Centro, Rio Grande, RS, 96201-900, Brasil.
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3
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Herrera AL, Potts R, Huber VC, Chaussee MS. Influenza enhances host susceptibility to non-pulmonary invasive Streptococcus pyogenes infections. Virulence 2023; 14:2265063. [PMID: 37772916 PMCID: PMC10566429 DOI: 10.1080/21505594.2023.2265063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 09/25/2023] [Indexed: 09/30/2023] Open
Abstract
Streptococcus pyogenes (group A streptococcus; GAS) causes a variety of invasive diseases (iGAS) such as bacteremia, toxic shock syndrome, and pneumonia, which are associated with high mortality despite the susceptibility of the bacteria to penicillin ex vivo. Epidemiologic studies indicate that respiratory influenza virus infection is associated with an increase in the frequency of iGAS diseases, including those not directly involving the lung. We modified a murine model of influenza A (IAV)-GAS superinfection to determine if viral pneumonia increased the susceptibility of mice subsequently infected with GAS in the peritoneum. The results showed that respiratory IAV infection increased the morbidity (weight loss) of mice infected intraperitoneally (i.p.) with GAS 3, 5, and 10 d after the initial viral infection. Mortality was also significantly increased when mice were infected with GAS 3 and 5 d after pulmonary IAV infection. Increased mortality among mice infected with virus 5 d prior to bacterial infection correlated with increased dissemination of GAS from the peritoneum to the blood, spleen, and lungs. The interval was also associated with a significant increase in the pro-inflammatory cytokines IFN-γ, IL-12, TNF-α, MCP-1 and IL-27 in sera. We conclude, using a murine model, that respiratory influenza virus infection increases the likelihood and severity of systemic iGAS disease, even when GAS infection does not originate in the respiratory tract.
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Affiliation(s)
- Andrea L. Herrera
- Division of Basic Biomedical Sciences, The Sanford School of Medicine of the University of South Dakota, Vermillion, SD, USA
| | - Rashaun Potts
- Division of Basic Biomedical Sciences, The Sanford School of Medicine of the University of South Dakota, Vermillion, SD, USA
| | - Victor C. Huber
- Division of Basic Biomedical Sciences, The Sanford School of Medicine of the University of South Dakota, Vermillion, SD, USA
| | - Michael S. Chaussee
- Division of Basic Biomedical Sciences, The Sanford School of Medicine of the University of South Dakota, Vermillion, SD, USA
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4
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Martin BE, Taylor EB, Attipoe EM, Wu W, Stec DE, Showmaker KC, Garrett MR. Sex and molecular differences in cardiovascular parameters at peak influenza disease in mice. Physiol Genomics 2023; 55:79-89. [PMID: 36645670 PMCID: PMC9925171 DOI: 10.1152/physiolgenomics.00146.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 12/29/2022] [Accepted: 01/09/2023] [Indexed: 01/17/2023] Open
Abstract
There is a growing interest in the detection of subtle changes in cardiovascular physiology in response to viral infection to develop better disease surveillance strategies. This is not only important for earlier diagnosis and better prognosis of symptomatic carriers but also useful to diagnose asymptomatic carriers of the virus. Previous studies provide strong evidence of an association between inflammatory biomarker levels and both blood pressure (BP) and heart rate (HR) during infection. The identification of novel biomarkers during an inflammatory event could significantly improve predictions for cardiovascular events. Thus, we evaluated changes in cardiovascular physiology induced in A/Puerto Rico/8/34 (PR8) influenza infections in female and male C57BL/6J mice and compared them with the traditional method of influenza disease detection using body weight (BW). Using radiotelemetry, changes in BP, HR, and activity were studied. Change in BW of infected females was significantly decreased from 5 to 13 days postinfection (dpi), yet alterations in normal physiology including loss of diurnal rhythm and reduced activity was observed starting at about 3 dpi for HR and 4 dpi for activity and BP; continuing until about 13 dpi. In contrast, males had significantly decreased BW 8 to 12 dpi and demonstrated altered physiological measurements for a shorter period compared with females with a reduction starting at 5 dpi for activity, 6 dpi for BP, and 7 dpi for HR until about 12 dpi, 10 dpi, and 9 dpi, respectively. Finally, females and males exhibited different patterns of inflammatory maker expression in lungs at peak disease by analyzing bulk RNA-sequencing data for lungs and Bio-plex cytokine assay for blood collected from influenza-infected and naïve C57BL/6J female and male mice at 7 dpi. In total, this study provides insight into cardiovascular changes and molecular markers to distinguish sex differences in peak disease caused by influenza virus infection.NEW & NOTEWORTHY This study performed longitudinal cardiovascular measurements of influenza viral infection and identified sex difference in both physiological and molecular markers at peak disease.
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Affiliation(s)
- Brigitte E Martin
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Erin B Taylor
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Esinam M Attipoe
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - Wenjie Wu
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
| | - David E Stec
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | | | - Michael R Garrett
- Department of Pharmacology and Toxicology, University of Mississippi Medical Center, Jackson, Mississippi
- Division of Nephrology, Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi
- Division of Genetics, Department of Pediatrics, University of Mississippi Medical Center, Jackson, Mississippi
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5
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Zhang Z, Zeng J, Li Y, Liao Q, Huang D, Zou Y, Liu G. Tail suspension delays ectopic ossification in proteoglycan-induced ankylosing spondylitis in mice via miR-103/DKK1. Exp Ther Med 2021; 22:965. [PMID: 34335907 PMCID: PMC8290398 DOI: 10.3892/etm.2021.10397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 06/15/2021] [Indexed: 11/14/2022] Open
Abstract
Ankylosing spondylitis (AS), characterized by inflammatory lesions and osteophyte formation, is a common immune rheumatic disease affecting the sacroiliac and axial joints. A high-intensity mechanical load is known to accelerate the heterotopic ossification associated with enthesitis in AS. Thus, the present study explored whether decreased mechanical load could delay the heterotopic ossification in AS. First, 24-week-old female BALB/c mice were induced with proteoglycan (PG) to establish an AS model. The AS-induced pathological and bone morphological changes of the sacroiliac joint were confirmed by hematoxylin and eosin staining and microCT analysis, respectively. Subsequently, the mice were treated with interventions of different mechanical loads. Using reverse transcription-quantitative PCR, it was revealed that expression levels of the osteogenesis-related genes bone morphogenetic protein-2, runt-related transcription factor 2 and osteocalcin were significantly reduced in sacroiliac bone tissue after intervention with a reduced mechanical load. The level of mechanosensory microRNA (miR)-103 increased in response to reduced mechanical loads. Consistently, in groups with reduced mechanical load, proteins with mechanical functions, including ρ-associated coiled-coil-containing protein kinase 1 (ROCK1), phosphorylated (p)-Erk1/2 and β-catenin, were reduced compared with the PG control. A dual-luciferase assay verified that miR-103 binds to the 3'-untranslated region end of Rock1 mRNA, thus negatively regulating the activity of Rock1 and affecting pathological ossification during AS. However, immunohistochemical staining indicated that the expression of dickkopf Wnt signaling pathway inhibitor 1, an inhibitor of the Wnt/β-catenin pathway, was increased in sacroiliac tissues. The results indicated that tail suspension decreased the mechanical load, thus reducing the bone formation in AS mice. Furthermore, tail suspension could inhibit the activation of mechanical kinase ROCK1 and p-Erk1/2 in the MAPK signaling pathway by upregulating miR-103, thereby inhibiting the classical osteogenesis-related Wnt/β-catenin pathway in AS. In summary, the present study uncovered the ameliorative effect of suspension on AS and its therapeutic potential for AS.
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Affiliation(s)
- Zhenzhen Zhang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China.,Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China.,Department of Rehabilitation, Hankou Hospital, Wuhan, Hubei 430015, P.R. China
| | - Jing Zeng
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Yang Li
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Qing Liao
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Dongdong Huang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Yucong Zou
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China
| | - Gang Liu
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Southern Medical University, Guangzhou, Guangdong 510000, P.R. China.,Department of Rehabilitation Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China
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6
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Felgenhauer JL, Brune JE, Long ME, Manicone AM, Chang MY, Brabb TL, Altemeier WA, Frevert CW. Evaluation of Nutritional Gel Supplementation in C57BL/6J Mice Infected with Mouse-Adapted Influenza A/PR/8/34 Virus. Comp Med 2020; 70:471-486. [PMID: 33323164 PMCID: PMC7754200 DOI: 10.30802/aalas-cm-20-990138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 11/05/2019] [Accepted: 09/04/2020] [Indexed: 12/11/2022]
Abstract
Mice are a common animal model for the study of influenza virus A (IAV). IAV infection causes weight loss due to anorexia and dehydration, which can result in early removal of mice from a study when they reach a humane endpoint. To reduce the number of mice prematurely removed from an experiment, we assessed nutritional gel (NG) supplementation as a support strategy for mice infected with mouse-adapted Influenza A/Puerto Rico/8/34 (A/PR/8/34; H1N1) virus. We hypothesized that, compared with the standard of care (SOC), supplementation with NG would reduce weight loss and increase survival in mice infected with IAV without impacting the initial immune response to infection. To assess the effects of NG, male and female C57BL/6J mice were infected with IAV at low, intermediate, or high doses. When compared with SOC, mice given NG showed a significant decrease in the maximal percent weight loss at all viral doses in males and at the intermediate dose for females. Mice supplemented with NG had no deaths for either sex at the intermediate dose and a significant increase in survival in males at the high viral dose. Supplementation with NG did not alter the viral titer or the pulmonary recruitment of immune cells as measured by cell counts and flow cytometry of cells recovered in bronchoalveolar lavage (BAL) fluid in either sex. However, mice given NG had a significant reduction in IL6 and TNFα in BAL fluid and no significant differences in CCL2, IL4, IL10, CXCL1, CXCL2, and VEGF. The results of this study show that as compared with infected SOC mice, infected mice supplemented with NG have reduced weight loss and increased survival, with males showing a greater benefit. These results suggest that NG should be considered as a support strategy and indicate that sex is an important biologic variable in mice infected with IAV.
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Key Words
- iav, influenza a virus
- soc, standard of care
- ng, nutritional gel
- eud50, euthanasia dose 50
- ld50, lethal-dose 50
- pfu, plaque forming unit
- dpi, days post infection
- il6, interleukin 6
- sem, standard error of mean
- ns, no significance
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Affiliation(s)
- Jessica L Felgenhauer
- Department of Comparative Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Jourdan E Brune
- Department of Comparative Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Matthew E Long
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Anne M Manicone
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Mary Y Chang
- Department of Comparative Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Thea L Brabb
- Department of Comparative Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - William A Altemeier
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington
| | - Charles W Frevert
- Department of Comparative Medicine, University of Washington, Seattle, Washington; Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, University of Washington, Seattle, Washington; Center for Lung Biology, University of Washington at South Lake Union, Seattle, Washington;,
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7
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Exuberant fibroblast activity compromises lung function via ADAMTS4. Nature 2020; 587:466-471. [PMID: 33116313 DOI: 10.1038/s41586-020-2877-5] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
Severe respiratory infections can result in acute respiratory distress syndrome (ARDS)1. There are no effective pharmacological therapies that have been shown to improve outcomes for patients with ARDS. Although the host inflammatory response limits spread of and eventually clears the pathogen, immunopathology is a major contributor to tissue damage and ARDS1,2. Here we demonstrate that respiratory viral infection induces distinct fibroblast activation states, which we term extracellular matrix (ECM)-synthesizing, damage-responsive and interferon-responsive states. We provide evidence that excess activity of damage-responsive lung fibroblasts drives lethal immunopathology during severe influenza virus infection. By producing ECM-remodelling enzymes-in particular the ECM protease ADAMTS4-and inflammatory cytokines, damage-responsive fibroblasts modify the lung microenvironment to promote robust immune cell infiltration at the expense of lung function. In three cohorts of human participants, the levels of ADAMTS4 in the lower respiratory tract were associated with the severity of infection with seasonal or avian influenza virus. A therapeutic agent that targets the ECM protease activity of damage-responsive lung fibroblasts could provide a promising approach to preserving lung function and improving clinical outcomes following severe respiratory infections.
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8
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Hao X, Lv Q, Li F, Xu Y, Gao H. The characteristics of hDPP4 transgenic mice subjected to aerosol MERS coronavirus infection via an animal nose-only exposure device. Animal Model Exp Med 2019; 2:269-281. [PMID: 31942559 PMCID: PMC6930991 DOI: 10.1002/ame2.12088] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2019] [Revised: 09/12/2019] [Accepted: 10/06/2019] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Middle East respiratory syndrome coronavirus (MERS-CoV), which is not fully understood in regard to certain transmission routes and pathogenesis and lacks specific therapeutics and vaccines, poses a global threat to public health. METHODS To simulate the clinical aerosol transmission route, hDPP4 transgenic mice were infected with MERS-CoV by an animal nose-only exposure device and compared with instillation-inoculated mice. The challenged mice were observed for 14 consecutive days and necropsied on days 3, 5, 7, and 9 to analyze viral load, histopathology, viral antigen distribution, and cytokines in tissues. RESULTS MERS-CoV aerosol-infected mice with an incubation period of 5-7 days showed weight loss on days 7-11, obvious lung lesions on day 7, high viral loads in the lungs on days 3-9 and in the brain on days 7-9, and 60% survival. MERS-CoV instillation-inoculated mice exhibited clinical signs on day 1, obvious lung lesions on days 3-5, continuous weight loss, 0% survival by day 5, and high viral loads in the lungs and brain on days 3-5. Viral antigen and high levels of proinflammatory cytokines and chemokines were detected in the aerosol and instillation groups. Disease, lung lesion, and viral replication progressions were slower in the MERS-CoV aerosol-infected mice than in the MERS-CoV instillation-inoculated mice. CONCLUSION hDPP4 transgenic mice were successfully infected with MERS-CoV aerosols via an animal nose-only exposure device, and aerosol- and instillation-infected mice simulated the clinical symptoms of moderate diffuse interstitial pneumonia. However, the transgenic mice exposed to aerosol MERS-CoV developed disease and lung pathology progressions that more closely resembled those observed in humans.
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Affiliation(s)
- Xin‐yan Hao
- Institute of Laboratory Animal SciencesChinese Academy of Medical Sciences (CAMS) & Comparative Medicine CentrePeking Union Medical College (PUMC)Key Laboratory of Human Disease Comparative MedicineNational Health Commission of China (NHC)Beijing Key Laboratory for Animal Models of Emerging and Reemerging InfectionsBeijingChina
| | - Qi Lv
- Institute of Laboratory Animal SciencesChinese Academy of Medical Sciences (CAMS) & Comparative Medicine CentrePeking Union Medical College (PUMC)Key Laboratory of Human Disease Comparative MedicineNational Health Commission of China (NHC)Beijing Key Laboratory for Animal Models of Emerging and Reemerging InfectionsBeijingChina
| | - Feng‐di Li
- Institute of Laboratory Animal SciencesChinese Academy of Medical Sciences (CAMS) & Comparative Medicine CentrePeking Union Medical College (PUMC)Key Laboratory of Human Disease Comparative MedicineNational Health Commission of China (NHC)Beijing Key Laboratory for Animal Models of Emerging and Reemerging InfectionsBeijingChina
| | - Yan‐feng Xu
- Institute of Laboratory Animal SciencesChinese Academy of Medical Sciences (CAMS) & Comparative Medicine CentrePeking Union Medical College (PUMC)Key Laboratory of Human Disease Comparative MedicineNational Health Commission of China (NHC)Beijing Key Laboratory for Animal Models of Emerging and Reemerging InfectionsBeijingChina
| | - Hong Gao
- Institute of Laboratory Animal SciencesChinese Academy of Medical Sciences (CAMS) & Comparative Medicine CentrePeking Union Medical College (PUMC)Key Laboratory of Human Disease Comparative MedicineNational Health Commission of China (NHC)Beijing Key Laboratory for Animal Models of Emerging and Reemerging InfectionsBeijingChina
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9
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Hao X, Li F, Lv Q, Xu Y, Han Y, Gao H. Establishment of BALB/C mouse models of influenza A H1N1 aerosol inhalation. J Med Virol 2019; 91:1918-1929. [DOI: 10.1002/jmv.25550] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Accepted: 07/12/2019] [Indexed: 12/20/2022]
Affiliation(s)
- Xin‐Yan Hao
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC); Key Laboratory of Human Disease Comparative Medicine, Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Reemerging infectiousBeijing China
| | - Feng‐Di Li
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC); Key Laboratory of Human Disease Comparative Medicine, Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Reemerging infectiousBeijing China
| | - Qi Lv
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC); Key Laboratory of Human Disease Comparative Medicine, Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Reemerging infectiousBeijing China
| | - Yan‐Feng Xu
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC); Key Laboratory of Human Disease Comparative Medicine, Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Reemerging infectiousBeijing China
| | - Yun‐Lin Han
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC); Key Laboratory of Human Disease Comparative Medicine, Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Reemerging infectiousBeijing China
| | - Hong Gao
- Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences (CAMS) & Comparative Medicine Centre, Peking Union Medical College (PUMC); Key Laboratory of Human Disease Comparative Medicine, Ministry of Health, Beijing Key Laboratory for Animal Models of Emerging and Reemerging infectiousBeijing China
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10
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Vermillion MS, Nelson A, Vom Steeg L, Loube J, Mitzner W, Klein SL. Pregnancy preserves pulmonary function following influenza virus infection in C57BL/6 mice. Am J Physiol Lung Cell Mol Physiol 2018; 315:L517-L525. [PMID: 29847990 DOI: 10.1152/ajplung.00066.2018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Pregnancy is associated with significant anatomic and functional changes to the cardiopulmonary system. Using pregnant C57BL/6 mice, we characterized changes in pulmonary structure and function during pregnancy in healthy animals and following infection with influenza A virus (IAV). We hypothesized that pregnancy-associated alterations in pulmonary physiology would contribute to the more severe outcome of IAV infection. Nonpregnant and pregnant females (at embryonic day 10.5) were either mock-infected or infected with 2009 H1N1 IAV for assessment of pulmonary function, structure, and inflammation at 8 days postinoculation. There were baseline differences in pulmonary function, with pregnant females having greater lung compliance, total lung capacity, and fixed lung volume than nonpregnant females. Following IAV infection, both pregnant and nonpregnant females exhibited reduced circulating progesterone, which in nonpregnant females was associated with increased pulmonary resistance and decreased lung compliance, minute ventilation, and oxygen diffusing capacity compared with uninfected nonpregnant females. In pregnant females, reduced concentrations of progesterone were associated with adverse pregnancy outcomes, but measures of pulmonary function were preserved following IAV infection and were not significantly different from uninfected pregnant mice. Following IAV infection, infectious virus titers and total numbers of pulmonary leukocytes were similar between pregnant and nonpregnant females, but the histological density of pulmonary inflammation was reduced in pregnant animals. These data suggest that pregnancy in mice is associated with significant alterations in pulmonary physiology but that these changes served to preserve lung function during IAV infection. Pregnancy-associated alterations in pulmonary physiology may serve to protect females during severe influenza.
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Affiliation(s)
- Meghan S Vermillion
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland.,Department of Molecular and Comparative Pathobiology, The Johns Hopkins School of Medicine , Baltimore, Maryland
| | - Andrew Nelson
- Department of Environmental Health and Engineering, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland
| | - Landon Vom Steeg
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland
| | - Jeffery Loube
- Department of Environmental Health and Engineering, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland
| | - Wayne Mitzner
- Department of Environmental Health and Engineering, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland
| | - Sabra L Klein
- W. Harry Feinstone Department of Molecular Microbiology and Immunology, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland.,Department of Biochemistry and Molecular Biology, The Johns Hopkins Bloomberg School of Public Health , Baltimore, Maryland
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A Recombinant Adenovirus Expressing Ovine Interferon Tau Prevents Influenza Virus-Induced Lethality in Mice. J Virol 2016; 90:3783-8. [PMID: 26739058 DOI: 10.1128/jvi.03258-15] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 01/03/2016] [Indexed: 12/29/2022] Open
Abstract
Ovine interferon tau (IFN-τ) is a unique type I interferon with low toxicity and a broad host range in vivo. We report the generation of a nonreplicative recombinant adenovirus expressing biologically active IFN-τ. Using the B6.A2G-Mx1 mouse model, we showed that single-dose intranasal administration of recombinant Ad5-IFN-τ can effectively prevent lethality and disease induced by highly virulent hv-PR8 influenza virus by activating the interferon response and preventing viral replication.
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