22 results on '"Ferren M"'
Search Results
2. Authentic modeling of human respiratory virus infection in human pluripotent stem cell-derived lung organoids
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Marion Ferren, Negar Makhsous, Thomas Briese, Bert K. Rima, Matteo Porotto, Alexander L. Greninger, Yik Siu, Ya-Wen Chen, Anne Moscona, Hans-Willem Snoeck, Porotto, M., Ferren, M., Chen, Y. -W., Siu, Y., Makhsous, N., Rima, B., Briese, T., Greninger, A. L., Snoeck, H. -W., and Moscona, A.
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Viral pathogenesis ,viruses ,0302 clinical medicine ,Tissue infection model ,Induced pluripotent stem cell ,Lung ,Cells, Cultured ,0303 health sciences ,Cell Differentiation ,respiratory system ,QR1-502 ,3. Good health ,Organoids ,Human Parainfluenza Virus ,medicine.anatomical_structure ,030220 oncology & carcinogenesis ,Respiratory virus ,Research Article ,Pluripotent Stem Cells ,Lung organoid ,parainfluenza virus ,Genome, Viral ,Biology ,Respirovirus Infections ,lung organoids ,Microbiology ,Virus ,Host-Microbe Biology ,Measles virus ,03 medical and health sciences ,respiratory viruses ,Virology ,medicine ,Humans ,Viral shedding ,030304 developmental biology ,Whole Genome Sequencing ,Respiratory viruse ,Infant ,Virus Internalization ,Editor's Pick ,biology.organism_classification ,Parainfluenza Virus 3, Human ,respiratory tract diseases ,Alveolar Epithelial Cells ,Respiratory Syncytial Virus, Human ,Parainfluenza viru - Abstract
Respiratory viruses are among the first pathogens encountered by young children, and the significant impact of these viral infections on the developing lung is poorly understood. Circulating viruses are suited to the environment of the human lung and are different from those of viruses grown in cultured cells. We modeled respiratory virus infections that occur in children or infect the distal lung using lung organoids that represent the entire developing infant lung. These 3D lung organoids, derived from human pluripotent stem cells, develop into branching airway and alveolar structures and provide a tissue environment that maintains the authentic viral genome. The lung organoids can be genetically engineered prior to differentiation, thereby generating tissues bearing or lacking specific features that may be relevant to viral infection, a feature that may have utility for the study of host-pathogen interaction for a range of lung pathogens., Infectious viruses so precisely fit their hosts that the study of natural viral infection depends on host-specific mechanisms that affect viral infection. For human parainfluenza virus 3, a prevalent cause of lower respiratory tract disease in infants, circulating human viruses are genetically different from viruses grown in standard laboratory conditions; the surface glycoproteins that mediate host cell entry on circulating viruses are suited to the environment of the human lung and differ from those of viruses grown in cultured cells. Polarized human airway epithelium cultures have been used to represent the large, proximal airways of mature adult airways. Here we modeled respiratory virus infections that occur in children or infect the distal lung using lung organoids that represent the entire developing infant lung. These 3D lung organoids derived from human pluripotent stem cells contain mesoderm and pulmonary endoderm and develop into branching airway and alveolar structures. Whole-genome sequencing analysis of parainfluenza viruses replicating in the organoids showed maintenance of nucleotide identity, suggesting that no selective pressure is exerted on the virus in this tissue. Infection with parainfluenza virus led to viral shedding without morphological changes, while respiratory syncytial virus infection induced detachment and shedding of infected cells into the lung organoid lumens, reminiscent of parainfluenza and respiratory syncytial virus in human infant lungs. Measles virus infection, in contrast, induced syncytium formation. These human stem cell-derived lung organoids may serve as an authentic model for respiratory viral pathogenesis in the developing or infant lung, recapitulating respiratory viral infection in the host.
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- 2019
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3. Development of the Harm Prevention Partners Clinical Model: An Academic-Practice Partnership for Prevention of Patient Harm Events.
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Bartlett Ellis R, Remick J, Siehl M, Plunkitt AM, and Ferren M
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- Humans, Patient Safety, Nursing, Patient Harm prevention & control
- Abstract
This innovative academic-practice partnership applied user-centered design, resulting in a new clinical model, the "Harm Prevention Partners Program." The model engaged students working as teams with faculty to intervene on nurse-sensitive indicators by documenting care on a novel smartphone tool and generating an intervention dashboard to visualize impact. Faculty utilized the dashboard to guide postclinical debriefing and highlight students' impact on patient outcomes., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2023 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2023
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4. Early Permissiveness of Central Nervous System Cells to Measles Virus Infection Is Determined by Hyperfusogenicity and Interferon Pressure.
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Ferren M, Lalande A, Iampietro M, Canus L, Decimo D, Gerlier D, Porotto M, and Mathieu C
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- Animals, Cricetinae, Humans, Brain, Interferons metabolism, Viral Fusion Proteins genetics, Central Nervous System virology, Measles, Measles virus physiology
- Abstract
The cessation of measles virus (MeV) vaccination in more than 40 countries as a consequence of the COVID-19 pandemic is expected to significantly increase deaths due to measles. MeV can infect the central nervous system (CNS) and lead to lethal encephalitis. Substantial part of virus sequences recovered from patients' brain were mutated in the matrix and/or the fusion protein (F). Mutations of the heptad repeat domain located in the C terminal (HRC) part of the F protein were often observed and were associated to hyperfusogenicity. These mutations promote brain invasion as a hallmark of neuroadaptation. Wild-type F allows entry into the brain, followed by limited spreading compared with the massive invasion observed for hyperfusogenic MeV. Taking advantage of our ex vivo models of hamster organotypic brain cultures, we investigated how the hyperfusogenic mutations in the F HRC domain modulate virus distribution in CNS cells. In this study, we also identified the dependence of neural cells susceptibility on both their activation state and destabilization of the virus F protein. Type I interferon (IFN-I) impaired mainly astrocytes and microglial cells permissiveness contrarily to neurons, opening a new way of consideration on the development of treatments against viral encephalitis.
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- 2023
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5. Nebulized fusion inhibitory peptide protects cynomolgus macaques from measles virus infection.
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Reynard O, Gonzalez C, Dumont C, Iampietro M, Ferren M, Le Guellec S, Laurie L, Mathieu C, Carpentier G, Roseau G, Bovier FT, Zhu Y, Le Pennec D, Montharu J, Addetia A, Greninger AL, Alabi CA, Brisebard E, Moscona A, Vecellio L, Porotto M, and Horvat B
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- Animals, Humans, Measles virus, SARS-CoV-2, Viral Fusion Proteins metabolism, Peptides pharmacology, Macaca fascicularis metabolism, COVID-19 prevention & control, Measles prevention & control
- Abstract
Measles is the most contagious airborne viral infection and the leading cause of child death among vaccine-preventable diseases. We show here that aerosolized lipopeptide fusion inhibitor, derived from heptad-repeat regions of the measles virus (MeV) fusion protein, blocks respiratory MeV infection in a non-human primate model, the cynomolgus macaque. We use a custom-designed mesh nebulizer to ensure efficient aerosol delivery of peptide to the respiratory tract and demonstrate the absence of adverse effects and lung pathology in macaques. The nebulized peptide efficiently prevents MeV infection, resulting in the complete absence of MeV RNA, MeV-infected cells, and MeV-specific humoral responses in treated animals. This strategy provides an additional means to fight against respiratory infection in non-vaccinated people, that can be readily translated to human trials. It presents a proof-of-concept for the aerosol delivery of fusion inhibitory peptides to protect against measles and other airborne viruses, including SARS-CoV-2, in case of high-risk exposure., (© 2022. The Author(s).)
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- 2022
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6. Hamster organotypic kidney culture model of early-stage SARS-CoV-2 infection highlights a two-step renal susceptibility.
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Shyfrin SR, Ferren M, Perrin-Cocon L, Espi M, Charmetant X, Brailly M, Decimo D, Iampietro M, Canus L, Horvat B, Lotteau V, Vidalain PO, Thaunat O, and Mathieu C
- Abstract
Kidney pathology is frequently reported in patients hospitalized with COVID-19, the pandemic disease caused by the Severe acute respiratory coronavirus 2 (SARS-CoV-2). However, due to a lack of suitable study models, the events occurring in the kidney during the earliest stages of infection remain unknown. We have developed hamster organotypic kidney cultures (OKCs) to study the early stages of direct renal infection. OKCs maintained key renal structures in their native three-dimensional arrangement. SARS-CoV-2 productively replicated in hamster OKCs, initially targeting endothelial cells and later disseminating into proximal tubules. We observed a delayed interferon response, markers of necroptosis and pyroptosis, and an early repression of pro-inflammatory cytokines transcription followed by a strong later upregulation. While it remains an open question whether an active replication of SARS-CoV-2 takes place in the kidneys of COVID-19 patients with AKI, our model provides new insights into the kinetics of SARS-CoV-2 kidney infection and can serve as a powerful tool for studying kidney infection by other pathogens and testing the renal toxicity of drugs., Competing Interests: Declaration of conflicting interests: The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2022.)
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- 2022
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7. Advancing Nursing Leadership Science Through an Innovative Research-Practice Partnership.
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Nelson-Brantley HV, Prestia A, Warshawsky NE, and Ferren M
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- Humans, United States, Leadership
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Abstract: The Association for Leadership Science in Nursing and American Organization for Nursing Leadership Foundation have formed a new research-practice collaborative. The collaborative allows for a synergistic approach to the advancement of leadership science. This article discusses the impetus for the collaborative, its structure, and how its synergy of research and practice expertise provides immense opportunity for robust, practice-relevant research., Competing Interests: The authors declare no conflicts of interest., (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)
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- 2022
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8. Hamster organotypic modeling of SARS-CoV-2 lung and brainstem infection.
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Ferren M, Favède V, Decimo D, Iampietro M, Lieberman NAP, Weickert JL, Pelissier R, Mazelier M, Terrier O, Moscona A, Porotto M, Greninger AL, Messaddeq N, Horvat B, and Mathieu C
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- Adenosine Monophosphate analogs & derivatives, Adenosine Monophosphate pharmacology, Alanine analogs & derivatives, Alanine pharmacology, Alveolar Epithelial Cells virology, Animals, Antiviral Agents pharmacology, Brain Stem cytology, Brain Stem immunology, Brain Stem pathology, Cricetinae, Immunity, Innate, Inflammation, Lung cytology, Lung immunology, Lung pathology, Neurons virology, Organ Culture Techniques, Regulated Cell Death, SARS-CoV-2 drug effects, Viral Tropism, Brain Stem virology, Lung virology, Models, Biological, SARS-CoV-2 pathogenicity
- Abstract
SARS-CoV-2 has caused a global pandemic of COVID-19 since its emergence in December 2019. The infection causes a severe acute respiratory syndrome and may also spread to central nervous system leading to neurological sequelae. We have developed and characterized two new organotypic cultures from hamster brainstem and lung tissues that offer a unique opportunity to study the early steps of viral infection and screening antivirals. These models are not dedicated to investigate how the virus reaches the brain. However, they allow validating the early tropism of the virus in the lungs and demonstrating that SARS-CoV-2 could infect the brainstem and the cerebellum, mainly by targeting granular neurons. Viral infection induces specific interferon and innate immune responses with patterns specific to each organ, along with cell death by apoptosis, necroptosis, and pyroptosis. Overall, our data illustrate the potential of rapid modeling of complex tissue-level interactions during infection by a newly emerged virus., (© 2021. The Author(s).)
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- 2021
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9. Single-chain variable fragment antibody constructs neutralize measles virus infection in vitro and in vivo.
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Mathieu C, Ferren M, Harder O, Bovier FT, Marcink TC, Predella C, Angius F, Drew-Bear J, Dorrello NV, Greninger AL, Moscona A, Niewiesk S, Horvat B, and Porotto M
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- Antibodies, Viral, Humans, Measles virus, Measles, Single-Chain Antibodies
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- 2021
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10. Developing an internship program to support nursing student transition to clinical setting.
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Roush K, Opsahl A, and Ferren M
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- Humans, Inservice Training, Schools, Nursing, Education, Nursing, Baccalaureate, Internship and Residency, Students, Nursing
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Background: The largest statewide hospital system collaborated with local nursing schools to provide a patient care internship program for nursing students. The goal was to create a pipeline of future nurses by equipping students for work in the clinical setting and promoting nurse retention., Purpose: The purpose of this project was to determine the correlation between the student nurse internship program on the interns' NLCEX-RN pass rates, retention rates for the local hospitals, cost-savings, students' confidence, and program satisfaction., Method: Nursing students (n = 25) were recruited from local nursing schools for unlicensed assistant personnel positions at the system hospitals. The program included a six-week intensive to educate nursing students as non-licensed staff members of hospital units, which continues as a mentored experience during the senior year of their baccalaureate program. Qualitative and quantitative data were collected and analyzed., Results: The program had a pass rate of 96% for NCLEX-RN on first attempt. Additionally, 82% of participants were retained at the hospitals. Hospitals saved $216,993. Students reported increased role satisfaction with the program., Conclusions: Program results suggest benefits of supportive NCLEX-RN pass rates, nurse retention, and cost benefit. Findings can be used to support future program expansion and improve the experience of nursing students as they transition into professional practice., (Published by Elsevier Inc.)
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- 2021
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11. Molecular Features of the Measles Virus Viral Fusion Complex That Favor Infection and Spread in the Brain.
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Mathieu C, Bovier FT, Ferren M, Lieberman NAP, Predella C, Lalande A, Peddu V, Lin MJ, Addetia A, Patel A, Outlaw V, Corneo B, Dorrello NV, Briese T, Hardie D, Horvat B, Moscona A, Greninger AL, and Porotto M
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- Amino Acid Substitution, Animals, Brain cytology, Brain pathology, Central Nervous System Diseases virology, Chlorocebus aethiops, Female, HEK293 Cells, Humans, Induced Pluripotent Stem Cells pathology, Induced Pluripotent Stem Cells virology, Male, Measles virology, Measles virus pathogenicity, Metagenomics, Mice, Neurons virology, Organoids cytology, Organoids virology, Vero Cells, Viral Fusion Proteins chemistry, Viral Fusion Proteins classification, Viral Fusion Proteins metabolism, Brain virology, Measles virus genetics, Viral Fusion Proteins genetics
- Abstract
Measles virus (MeV) bearing a single amino acid change in the fusion protein (F)-L454W-was isolated from two patients who died of MeV central nervous system (CNS) infection. This mutation in F confers an advantage over wild-type virus in the CNS, contributing to disease in these patients. Using murine ex vivo organotypic brain cultures and human induced pluripotent stem cell-derived brain organoids, we show that CNS adaptive mutations in F enhance the spread of virus ex vivo . The spread of virus in human brain organoids is blocked by an inhibitory peptide that targets F, confirming that dissemination in the brain tissue is attributable to F. A single mutation in MeV F thus alters the fusion complex to render MeV more neuropathogenic. IMPORTANCE Measles virus (MeV) infection can cause serious complications in immunocompromised individuals, including measles inclusion body encephalitis (MIBE). In some cases, MeV persistence and subacute sclerosing panencephalitis (SSPE), another severe central nervous system (CNS) complication, develop even in the face of a systemic immune response. Both MIBE and SSPE are relatively rare but lethal. It is unclear how MeV causes CNS infection. We introduced specific mutations that are found in MIBE or SSPE cases into the MeV fusion protein to test the hypothesis that dysregulation of the viral fusion complex-comprising F and the receptor binding protein, H-allows virus to spread in the CNS. Using metagenomic, structural, and biochemical approaches, we demonstrate that altered fusion properties of the MeV H-F fusion complex permit MeV to spread in brain tissue.
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- 2021
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12. Activation of cGAS/STING pathway upon paramyxovirus infection.
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Iampietro M, Dumont C, Mathieu C, Spanier J, Robert J, Charpenay A, Dupichaud S, Dhondt KP, Aurine N, Pelissier R, Ferren M, Mély S, Gerlier D, Kalinke U, and Horvat B
- Abstract
During inflammatory diseases, cancer, and infection, the cGAS/STING pathway is known to recognize foreign or self-DNA in the cytosol and activate an innate immune response. Here, we report that negative-strand RNA paramyxoviruses, Nipah virus (NiV), and measles virus (MeV), can also trigger the cGAS/STING axis. Although mice deficient for MyD88, TRIF, and MAVS still moderately control NiV infection when compared with wild-type mice, additional STING deficiency resulted in 100% lethality, suggesting synergistic roles of these pathways in host protection. Moreover, deletion of cGAS or STING resulted in decreased type I interferon production with enhanced paramyxoviral infection in both human and murine cells. Finally, the phosphorylation and ubiquitination of STING, observed during viral infections, confirmed the activation of cGAS/STING pathway by NiV and MeV. Our data suggest that cGAS/STING activation is critical in controlling paramyxovirus infection and possibly represents attractive targets to develop countermeasures against severe disease induced by these pathogens., Competing Interests: The authors declare no competing interests., (© 2021 The Authors.)
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- 2021
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13. [Type I interferon and selective permissiveness of central nervous system to measles virus infection].
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Ferren M, Horvat B, Gerlier D, and Mathieu C
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- Animals, Antigens, Viral analysis, Brain immunology, Dendritic Cells virology, Encephalitis, Viral virology, Humans, Macrophages, Alveolar virology, Mice, Mice, Transgenic metabolism, Receptor, Interferon alpha-beta genetics, Signaling Lymphocytic Activation Molecule Family Member 1 metabolism, Virus Internalization, Central Nervous System Viral Diseases virology, Interferon Type I metabolism, Measles virus immunology, Receptor, Interferon alpha-beta deficiency
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- 2021
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14. Development and use of a toolkit to facilitate implementation of an evidence-based intervention: a descriptive case study.
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Thoele K, Ferren M, Moffat L, Keen A, and Newhouse R
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Background: Implementation of evidence-based clinical interventions in real-world settings becomes a futile effort when effective strategies to foster adoption are not used. A toolkit, or a collection of adaptable documents to inform and facilitate implementation, can increase the use of evidence-based interventions. Most available toolkits provide resources about the intervention but lack guidance for adaptation to different contexts or strategies to support implementation. This paper describes the development and use of a toolkit to guide the implementation of an evidence-based intervention to identify and intervene for people with risky substance use., Methods: A descriptive case study describes the development and use of a toolkit throughout a two-year study. Investigators and site coordinators from 14 acute care hospitals developed tools and engaged external stakeholders as they prepared for implementation, integrated the clinical intervention into practice, and reflected on implementation., Results: The final toolkit included 54 different tools selected or created to define the intervention, engage and communicate with stakeholders, assess for readiness and plan for implementation, train clinical nurses and other stakeholders, evaluate training and implementation effectiveness, create policies and procedures for different contexts, and identify opportunities for reimbursement. Each tool corresponds to one or more implementation strategies., Conclusion: The approach used to develop this implementation toolkit may be used to create resources for the implementation of other evidence-based interventions., Competing Interests: Competing interestsThe authors declare that they have no competing interests., (© The Author(s) 2020.)
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- 2020
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15. High Pathogenicity of Nipah Virus from Pteropus lylei Fruit Bats, Cambodia.
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Gaudino M, Aurine N, Dumont C, Fouret J, Ferren M, Mathieu C, Reynard O, Volchkov VE, Legras-Lachuer C, Georges-Courbot MC, and Horvat B
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- Animals, Cambodia, Genome, Viral genetics, Henipavirus Infections epidemiology, Henipavirus Infections virology, Humans, Nipah Virus genetics, Phylogeny, RNA, Viral genetics, Real-Time Polymerase Chain Reaction, Whole Genome Sequencing, Chiroptera virology, Henipavirus Infections veterinary, Nipah Virus pathogenicity
- Abstract
We conducted an in-depth characterization of the Nipah virus (NiV) isolate previously obtained from a Pteropus lylei bat in Cambodia in 2003 (CSUR381). We performed full-genome sequencing and phylogenetic analyses and confirmed CSUR381 is part of the NiV-Malaysia genotype. In vitro studies revealed similar cell permissiveness and replication of CSUR381 (compared with 2 other NiV isolates) in both bat and human cell lines. Sequence alignments indicated conservation of the ephrin-B2 and ephrin-B3 receptor binding sites, the glycosylation site on the G attachment protein, as well as the editing site in phosphoprotein, suggesting production of nonstructural proteins V and W, known to counteract the host innate immunity. In the hamster animal model, CSUR381 induced lethal infections. Altogether, these data suggest that the Cambodia bat-derived NiV isolate has high pathogenic potential and, thus, provide insight for further studies and better risk assessment for future NiV outbreaks in Southeast Asia.
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- 2020
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16. Measles Encephalitis: Towards New Therapeutics.
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Ferren M, Horvat B, and Mathieu C
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- Animals, Antiviral Agents therapeutic use, Central Nervous System pathology, Disease Models, Animal, Encephalitis, Viral epidemiology, Encephalitis, Viral pathology, Encephalitis, Viral virology, Humans, Measles epidemiology, Measles pathology, Measles virology, Measles virus pathogenicity, Viral Proteins genetics, Viral Proteins metabolism, Viral Tropism, Central Nervous System virology, Encephalitis, Viral drug therapy, Measles drug therapy, Measles virus physiology
- Abstract
Measles remains a major cause of morbidity and mortality worldwide among vaccine preventable diseases. Recent decline in vaccination coverage resulted in re-emergence of measles outbreaks. Measles virus (MeV) infection causes an acute systemic disease, associated in certain cases with central nervous system (CNS) infection leading to lethal neurological disease. Early following MeV infection some patients develop acute post-infectious measles encephalitis (APME), which is not associated with direct infection of the brain. MeV can also infect the CNS and cause sub-acute sclerosing panencephalitis (SSPE) in immunocompetent people or measles inclusion-body encephalitis (MIBE) in immunocompromised patients. To date, cellular and molecular mechanisms governing CNS invasion are still poorly understood. Moreover, the known MeV entry receptors are not expressed in the CNS and how MeV enters and spreads in the brain is not fully understood. Different antiviral treatments have been tested and validated in vitro, ex vivo and in vivo , mainly in small animal models. Most treatments have high efficacy at preventing infection but their effectiveness after CNS manifestations remains to be evaluated. This review describes MeV neural infection and current most advanced therapeutic approaches potentially applicable to treat MeV CNS infection.
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- 2019
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17. Screening, brief intervention and referral to treatment (SBIRT) training for nurses in acute care settings: Lessons learned.
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Schwindt R, Agley J, Newhouse R, and Ferren M
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- Humans, Acute Disease nursing, Inservice Training organization & administration, Nursing Staff education, Referral and Consultation
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- 2019
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18. Measles Virus Bearing Measles Inclusion Body Encephalitis-Derived Fusion Protein Is Pathogenic after Infection via the Respiratory Route.
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Mathieu C, Ferren M, Jurgens E, Dumont C, Rybkina K, Harder O, Stelitano D, Madeddu S, Sanna G, Schwartz D, Biswas S, Hardie D, Hashiguchi T, Moscona A, Horvat B, Niewiesk S, and Porotto M
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- Amino Acid Substitution, Animals, Central Nervous System metabolism, Chlorocebus aethiops, Disease Models, Animal, Humans, Lung metabolism, Mice, Mice, Transgenic, Sigmodontinae, Vero Cells, Central Nervous System virology, Encephalitis, Viral genetics, Encephalitis, Viral metabolism, Encephalitis, Viral transmission, Inclusion Bodies, Viral genetics, Inclusion Bodies, Viral metabolism, Lung virology, Measles metabolism, Measles transmission, Measles virus physiology, Mutation, Missense, Viral Fusion Proteins genetics, Viral Fusion Proteins metabolism, Virus Replication
- Abstract
A clinical isolate of measles virus (MeV) bearing a single amino acid alteration in the viral fusion protein (F; L454W) was previously identified in two patients with lethal sequelae of MeV central nervous system (CNS) infection. The mutation dysregulated the viral fusion machinery so that the mutated F protein mediated cell fusion in the absence of known MeV cellular receptors. While this virus could feasibly have arisen via intrahost evolution of the wild-type (wt) virus, it was recently shown that the same mutation emerged under the selective pressure of small-molecule antiviral treatment. Under these conditions, a potentially neuropathogenic variant emerged outside the CNS. While CNS adaptation of MeV was thought to generate viruses that are less fit for interhost spread, we show that two animal models can be readily infected with CNS-adapted MeV via the respiratory route. Despite bearing a fusion protein that is less stable at 37°C than the wt MeV F, this virus infects and replicates in cotton rat lung tissue more efficiently than the wt virus and is lethal in a suckling mouse model of MeV encephalitis even with a lower inoculum. Thus, either during lethal MeV CNS infection or during antiviral treatment in vitro , neuropathogenic MeV can emerge, can infect new hosts via the respiratory route, and is more pathogenic (at least in these animal models) than wt MeV. IMPORTANCE Measles virus (MeV) infection can be severe in immunocompromised individuals and lead to complications, including measles inclusion body encephalitis (MIBE). In some cases, MeV persistence and subacute sclerosing panencephalitis (SSPE) occur even in the face of an intact immune response. While they are relatively rare complications of MeV infection, MIBE and SSPE are lethal. This work addresses the hypothesis that despite a dysregulated viral fusion complex, central nervous system (CNS)-adapted measles virus can spread outside the CNS within an infected host., (Copyright © 2019 American Society for Microbiology.)
- Published
- 2019
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19. Analysis of a Subacute Sclerosing Panencephalitis Genotype B3 Virus from the 2009-2010 South African Measles Epidemic Shows That Hyperfusogenic F Proteins Contribute to Measles Virus Infection in the Brain.
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Angius F, Smuts H, Rybkina K, Stelitano D, Eley B, Wilmshurst J, Ferren M, Lalande A, Mathieu C, Moscona A, Horvat B, Hashiguchi T, Porotto M, and Hardie D
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- Amino Acid Substitution, Animals, Brain virology, Cell Adhesion Molecules metabolism, Chlorocebus aethiops, Epidemics, Female, Genotype, Giant Cells virology, HEK293 Cells, Humans, Male, Measles epidemiology, Measles metabolism, Measles virology, Mutation, Neurons virology, South Africa, Subacute Sclerosing Panencephalitis virology, Vero Cells, Viral Fusion Proteins metabolism, Measles virus genetics, Subacute Sclerosing Panencephalitis genetics, Viral Fusion Proteins genetics
- Abstract
During a measles virus (MeV) epidemic in 2009 in South Africa, measles inclusion body encephalitis (MIBE) was identified in several HIV-infected patients. Years later, children are presenting with subacute sclerosing panencephalitis (SSPE). To investigate the features of established MeV neuronal infections, viral sequences were analyzed from brain tissue samples of a single SSPE case and compared with MIBE sequences previously obtained from patients infected during the same epidemic. Both the SSPE and the MIBE viruses had amino acid substitutions in the ectodomain of the F protein that confer enhanced fusion properties. Functional analysis of the fusion complexes confirmed that both MIBE and SSPE F protein mutations promoted fusion with less dependence on interaction by the viral receptor-binding protein with known MeV receptors. While the SSPE F required the presence of a homotypic attachment protein, MeV H, in order to fuse, MIBE F did not. Both F proteins had decreased thermal stability compared to that of the corresponding wild-type F protein. Finally, recombinant viruses expressing MIBE or SSPE fusion complexes spread in the absence of known MeV receptors, with MIBE F-bearing viruses causing large syncytia in these cells. Our results suggest that alterations to the MeV fusion complex that promote fusion and cell-to-cell spread in the absence of known MeV receptors is a key property for infection of the brain. IMPORTANCE Measles virus can invade the central nervous system (CNS) and cause severe neurological complications, such as MIBE and SSPE. However, mechanisms by which MeV enters the CNS and triggers the disease remain unclear. We analyzed viruses from brain tissue of individuals with MIBE or SSPE, infected during the same epidemic, after the onset of neurological disease. Our findings indicate that the emergence of hyperfusogenic MeV F proteins is associated with infection of the brain. We also demonstrate that hyperfusogenic F proteins permit MeV to enter cells and spread without the need to engage nectin-4 or CD150, known receptors for MeV that are not present on neural cells., (Copyright © 2019 American Society for Microbiology.)
- Published
- 2019
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20. Study protocol testing toolkit versus usual care for implementation of screening, brief intervention, referral to treatment in hospitals: a phased cluster randomized approach.
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Newhouse R, Janney M, Gilbert A, Agley J, Bakoyannis G, Ferren M, Mullins CD, Johantgen M, Schwindt R, and Thoele K
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- Humans, Communication, Electronic Health Records, Inservice Training organization & administration, Prospective Studies, Psychotherapy, Brief organization & administration, Quality Improvement, Referral and Consultation organization & administration, Residence Characteristics, Risk Factors, Substance-Related Disorders diagnosis, Substance-Related Disorders therapy, Multicenter Studies as Topic, Randomized Controlled Trials as Topic, Alcoholism diagnosis, Alcoholism therapy, Hospital Administration, Mass Screening methods, Tobacco Use Disorder diagnosis, Tobacco Use Disorder therapy
- Abstract
Background: Alarming rates of unhealthy alcohol, non-prescription drug, and tobacco use highlight the preventable health risks of substance abuse and the urgent need to activate clinicians to recognize and treat risky use. Screening, brief intervention, and referral to treatment (SBIRT) is an efficacious and effective processes to identify, reduce and prevent risky use of substances. This paper describes a study protocol testing implementation of a toolkit to enhance use of SBIRT in acute care settings to recognize and address patient risky alcohol, drug, and tobacco use., Methods: This study uses a phased cluster randomized mixed method design to test nurse-led implementation of an SBIRT toolkit on one medical-surgical unit at 14 acute care hospitals (critical access, community and academic health centers). Medical surgical units will be randomly assigned to implement the SBIRT toolkit (engagement and communication, assessment, planning, training, and evaluation tools) or a wait-list usual care control group that begins implementation 6 months later. Primary endpoints are documentation of SBIRT delivery in randomly selected electronic medical records at baseline, 6 months and 12 months after group 1 implementation (61 records per unit per time period, N = 2562). Two surveys will be administered to unit nurses: smoking cessation activities will be assessed at baseline and SBIRT use will be assessed on randomly-selected days after implementation. In addition, site coordinators will complete a baseline capacity assessment, an implementation fidelity survey post-implementation, and a structured interview at the end of the study. Multilevel mixed-effects effects logistic and linear models will be used to analyze use of SBIRT and cost outcomes., Discussion: This study will guide subsequent SBIRT implementation, dissemination, and spread across rural, community and urban healthcare systems throughout the state and beyond. The long-term objective is to activate clinicians to recognize, intervene and refer people with risky substance use to improve health and decrease substance use disorders. Trial registration ClinicalTrials.gov NCT03560076.
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- 2018
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21. Viral Entry Properties Required for Fitness in Humans Are Lost through Rapid Genomic Change during Viral Isolation.
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Iketani S, Shean RC, Ferren M, Makhsous N, Aquino DB, des Georges A, Rima B, Mathieu C, Porotto M, Moscona A, and Greninger AL
- Subjects
- DNA Mutational Analysis, Genome, Viral, Humans, Mutation, Parainfluenza Virus 3, Human genetics, Parainfluenza Virus 3, Human isolation & purification, Virus Cultivation, Adaptation, Biological, Genetic Fitness, Parainfluenza Virus 3, Human physiology, Respirovirus Infections virology, Serial Passage, Virus Internalization
- Abstract
Human parainfluenza viruses cause a large burden of human respiratory illness. While much research relies upon viruses grown in cultured immortalized cells, human parainfluenza virus 3 (HPIV-3) evolves in culture. Cultured viruses differ in their properties compared to clinical strains. We present a genome-wide survey of HPIV-3 adaptations to culture using metagenomic next-generation sequencing of matched pairs of clinical samples and primary culture isolates (zero passage virus). Nonsynonymous changes arose during primary viral isolation, almost entirely in the genes encoding the two surface glycoproteins-the receptor binding protein hemagglutinin-neuraminidase (HN) or the fusion protein (F). We recovered genomes from 95 HPIV-3 primary culture isolates and 23 HPIV-3 strains directly from clinical samples. HN mutations arising during primary viral isolation resulted in substitutions at HN's dimerization/F-interaction site, a site critical for activation of viral fusion. Alterations in HN dimer interface residues known to favor infection in culture occurred within 4 days (H552 and N556). A novel cluster of residues at a different face of the HN dimer interface emerged (P241 and R242) and imply a role in HPIV-3-mediated fusion. Functional characterization of these culture-associated HN mutations in a clinical isolate background revealed acquisition of the fusogenic phenotype associated with cultured HPIV-3; the HN-F complex showed enhanced fusion and decreased receptor-cleaving activity. These results utilize a method for identifying genome-wide changes associated with brief adaptation to culture to highlight the notion that even brief exposure to immortalized cells may affect key viral properties and underscore the balance of features of the HN-F complex required for fitness by circulating viruses. IMPORTANCE Human parainfluenza virus 3 is an important cause of morbidity and mortality among infants, the immunocompromised, and the elderly. Using deep genomic sequencing of HPIV-3-positive clinical material and its subsequent viral isolate, we discover a number of known and novel coding mutations in the main HPIV-3 attachment protein HN during brief exposure to immortalized cells. These mutations significantly alter function of the fusion complex, increasing fusion promotion by HN as well as generally decreasing neuraminidase activity and increasing HN-receptor engagement. These results show that viruses may evolve rapidly in culture even during primary isolation of the virus and before the first passage and reveal features of fitness for humans that are obscured by rapid adaptation to laboratory conditions., (Copyright © 2018 Iketani et al.)
- Published
- 2018
- Full Text
- View/download PDF
22. Breaking Down the Silos: An Interprofessional Approach to Education.
- Author
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Glossenger A, Bennett D, Ferren M, and Sageser PE
- Subjects
- Humans, Program Development, United States, Cooperative Behavior, Curriculum, Education, Medical organization & administration, Interprofessional Relations, Laryngectomy education, Patient-Centered Care organization & administration, Tracheostomy education
- Abstract
An interprofessional practice gap was identified in relation to discharge care provided to patients with tracheostomies or laryngectomies. Using a case study method, this article presents an approach that administrators of educational programs can take to develop an instructive strategy to address the practice gap and improve patient care., (Copyright 2016, SLACK Incorporated.)
- Published
- 2016
- Full Text
- View/download PDF
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