1
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Aloisio GM, Nagaraj D, Murray AM, Schultz EM, McBride T, Aideyan L, Nicholson EG, Henke D, Ferlic-Stark L, Rajan A, Kambal A, Johnson HL, Mosa E, Stossi F, Blutt SE, Piedra PA, Avadhanula V. Pediatric human nose organoids demonstrate greater susceptibility, epithelial responses, and cytotoxicity than adults during RSV infection. bioRxiv 2024:2024.02.01.578466. [PMID: 38352333 PMCID: PMC10862794 DOI: 10.1101/2024.02.01.578466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/24/2024]
Abstract
Respiratory syncytial virus (RSV) is a common cause of respiratory infections, causing significant morbidity and mortality, especially in young children. Why RSV infection in children is more severe as compared to healthy adults is not fully understood. In the present study, we infect both pediatric and adult human nose organoid-air liquid interface (HNO-ALIs) cell lines with two contemporary RSV isolates and demonstrate how they differ in virus replication, induction of the epithelial cytokine response, cell injury, and remodeling. Pediatric HNO-ALIs were more susceptible to early RSV replication, elicited a greater overall cytokine response, demonstrated enhanced mucous production, and manifested greater cellular damage compared to their adult counterparts. Adult HNO-ALIs displayed enhanced mucus production and robust cytokine response that was well controlled by superior regulatory cytokine response and possibly resulted in lower cellular damage than in pediatric lines. Taken together, our data suggest substantial differences in how pediatric and adult upper respiratory tract epithelium responds to RSV infection. These differences in epithelial cellular response can lead to poor mucociliary clearance and predispose infants to a worse respiratory outcome of RSV infection.
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Affiliation(s)
- Gina M Aloisio
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Divya Nagaraj
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Ashley M Murray
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Emily M Schultz
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Trevor McBride
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Letisha Aideyan
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Erin G Nicholson
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - David Henke
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Laura Ferlic-Stark
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Anubama Rajan
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Amal Kambal
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Hannah L Johnson
- Advanced Technology Cores, Baylor College of Medicine, Houston, Texas, USA
| | - Elina Mosa
- Advanced Technology Cores, Baylor College of Medicine, Houston, Texas, USA
| | - Fabio Stossi
- Advanced Technology Cores, Baylor College of Medicine, Houston, Texas, USA
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, Texas, USA
| | - Sarah E Blutt
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Pedro A Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas, USA
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
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2
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Tisza M, Javornik Cregeen S, Avadhanula V, Zhang P, Ayvaz T, Feliz K, Hoffman KL, Clark JR, Terwilliger A, Ross MC, Cormier J, Moreno H, Wang L, Payne K, Henke D, Troisi C, Wu F, Rios J, Deegan J, Hansen B, Balliew J, Gitter A, Zhang K, Li R, Bauer CX, Mena KD, Piedra PA, Petrosino JF, Boerwinkle E, Maresso AW. Wastewater sequencing reveals community and variant dynamics of the collective human virome. Nat Commun 2023; 14:6878. [PMID: 37898601 PMCID: PMC10613200 DOI: 10.1038/s41467-023-42064-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 09/25/2023] [Indexed: 10/30/2023] Open
Abstract
Wastewater is a discarded human by-product, but its analysis may help us understand the health of populations. Epidemiologists first analyzed wastewater to track outbreaks of poliovirus decades ago, but so-called wastewater-based epidemiology was reinvigorated to monitor SARS-CoV-2 levels while bypassing the difficulties and pit falls of individual testing. Current approaches overlook the activity of most human viruses and preclude a deeper understanding of human virome community dynamics. Here, we conduct a comprehensive sequencing-based analysis of 363 longitudinal wastewater samples from ten distinct sites in two major cities. Critical to detection is the use of a viral probe capture set targeting thousands of viral species or variants. Over 450 distinct pathogenic viruses from 28 viral families are observed, most of which have never been detected in such samples. Sequencing reads of established pathogens and emerging viruses correlate to clinical data sets of SARS-CoV-2, influenza virus, and monkeypox viruses, outlining the public health utility of this approach. Viral communities are tightly organized by space and time. Finally, the most abundant human viruses yield sequence variant information consistent with regional spread and evolution. We reveal the viral landscape of human wastewater and its potential to improve our understanding of outbreaks, transmission, and its effects on overall population health.
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Affiliation(s)
- Michael Tisza
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Sara Javornik Cregeen
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Ping Zhang
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Tulin Ayvaz
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Karen Feliz
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Kristi L Hoffman
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Justin R Clark
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- TAILOR Labs, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Austen Terwilliger
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- TAILOR Labs, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Matthew C Ross
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Juwan Cormier
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Hannah Moreno
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Li Wang
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Katelyn Payne
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - David Henke
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Catherine Troisi
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
| | - Fuqing Wu
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
- Department of Epidemiology, Human Genetics and Environmental Sciences, UTHealth Houston School of Public Health, Houston, 77030, USA
| | - Janelle Rios
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
| | - Jennifer Deegan
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
| | - Blake Hansen
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
- Department of Epidemiology, Human Genetics and Environmental Sciences, UTHealth Houston School of Public Health, Houston, 77030, USA
| | | | - Anna Gitter
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
- Department of Epidemiology, Human Genetics and Environmental Sciences, UTHealth Houston School of Public Health, Houston, 77030, USA
| | - Kehe Zhang
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Department of Biostatistics and Data Science, UTHealth Houston School of Public Health, Houston, TX, 77030, USA
- Center for Spatial-temporal Modeling for Applications in Population Sciences, UTHealth Houston School of Public Health, Houston, TX, 77030, USA
| | - Runze Li
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Department of Biostatistics and Data Science, UTHealth Houston School of Public Health, Houston, TX, 77030, USA
- Center for Spatial-temporal Modeling for Applications in Population Sciences, UTHealth Houston School of Public Health, Houston, TX, 77030, USA
| | - Cici X Bauer
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
- Department of Biostatistics and Data Science, UTHealth Houston School of Public Health, Houston, TX, 77030, USA
- Center for Spatial-temporal Modeling for Applications in Population Sciences, UTHealth Houston School of Public Health, Houston, TX, 77030, USA
| | - Kristina D Mena
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA
- Department of Epidemiology, Human Genetics and Environmental Sciences, UTHealth Houston School of Public Health, Houston, 77030, USA
| | - Pedro A Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Joseph F Petrosino
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA.
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA.
| | - Eric Boerwinkle
- School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, 77030, USA.
- Texas Epidemiologic Public Health Institute (TEPHI), Houston, TX, USA.
- Department of Epidemiology, Human Genetics and Environmental Sciences, UTHealth Houston School of Public Health, Houston, 77030, USA.
| | - Anthony W Maresso
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, 77030, USA.
- TAILOR Labs, Baylor College of Medicine, Houston, TX, 77030, USA.
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3
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Simon LM, Flocco C, Burkart F, Methner A, Henke D, Rauer L, Müller CL, Vogel J, Quaisser C, Overmann J, Simon S. Microbial fingerprints reveal interaction between museum objects, curators, and visitors. iScience 2023; 26:107578. [PMID: 37664629 PMCID: PMC10469763 DOI: 10.1016/j.isci.2023.107578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 05/30/2023] [Accepted: 08/04/2023] [Indexed: 09/05/2023] Open
Abstract
Microbial communities reside at the interface between humans and their environment. Whether the microbiome can be leveraged to gain information on human interaction with museum objects is unclear. To investigate this, we selected objects from the Museum für Naturkunde and the Pergamonmuseum in Berlin, Germany, varying in material and size. Using swabs, we collected 126 samples from natural and cultural heritage objects, which were analyzed through 16S rRNA sequencing. By comparing the microbial composition of touched and untouched objects, we identified a microbial signature associated with human skin microbes. Applying this signature to cultural heritage objects, we identified areas with varying degrees of exposure to human contact on the Ishtar gate and Sam'al gate lions. Furthermore, we differentiated objects touched by two different individuals. Our findings demonstrate that the microbiome of museum objects provides insights into the level of human contact, crucial for conservation, heritage science, and potentially provenance research.
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Affiliation(s)
- Lukas M. Simon
- Therapeutic Innovation Center, Baylor College of Medicine, Houston, TX 77030, USA
| | - Cecilia Flocco
- Department of Microbial Ecology and Diversity Research, Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
| | - Franziska Burkart
- Department of Microbial Ecology and Diversity Research, Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
| | - Anika Methner
- Department of Microbial Ecology and Diversity Research, Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
| | - David Henke
- Molecular Virology & Microbiology, Baylor College of Medicine, Houston, TX 77030, USA
| | - Luise Rauer
- Environmental Medicine, Faculty of Medicine, University of Augsburg, 86156 Augsburg, Germany
- Institute of Environmental Medicine, Helmholtz Munich, German Research Center for Environmental Health, 86156 Augsburg, Germany
- Institute of Computational Biology, Helmholtz Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany
| | - Christian L. Müller
- Institute of Computational Biology, Helmholtz Munich, German Research Center for Environmental Health, 85764 Neuherberg, Germany
| | - Johannes Vogel
- Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, 10115 Berlin, Germany
| | - Christiane Quaisser
- Museum für Naturkunde, Leibniz-Institut für Evolutions- und Biodiversitätsforschung, 10115 Berlin, Germany
| | - Jörg Overmann
- Department of Microbial Ecology and Diversity Research, Leibniz-Institute DSMZ-German Collection of Microorganisms and Cell Cultures, 38124 Braunschweig, Germany
| | - Stefan Simon
- Rathgen-Forschungslabor, Staatliche Museen zu Berlin - Preußischer Kulturbesitz, 14059 Berlin, Germany
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4
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Piedra FA, Henke D, Rajan A, Muzny DM, Doddapaneni H, Menon VK, Hoffman KL, Ross MC, Javornik Cregeen SJ, Metcalf G, Gibbs RA, Petrosino JF, Avadhanula V, Piedra PA. Modeling nonsegmented negative-strand RNA virus (NNSV) transcription with ejective polymerase collisions and biased diffusion. Front Mol Biosci 2023; 9:1095193. [PMID: 36699700 PMCID: PMC9868645 DOI: 10.3389/fmolb.2022.1095193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 12/19/2022] [Indexed: 01/11/2023] Open
Abstract
Infections by non-segmented negative-strand RNA viruses (NNSV) are widely thought to entail gradient gene expression from the well-established existence of a single promoter at the 3' end of the viral genome and the assumption of constant transcriptional attenuation between genes. But multiple recent studies show viral mRNA levels in infections by respiratory syncytial virus (RSV), a major human pathogen and member of NNSV, that are inconsistent with a simple gradient. Here we integrate known and newly predicted phenomena into a biophysically reasonable model of NNSV transcription. Our model succeeds in capturing published observations of respiratory syncytial virus and vesicular stomatitis virus (VSV) mRNA levels. We therefore propose a novel understanding of NNSV transcription based on the possibility of ejective polymerase-polymerase collisions and, in the case of RSV, biased polymerase diffusion.
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Affiliation(s)
- Felipe-Andrés Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States,*Correspondence: Felipe-Andrés Piedra,
| | - David Henke
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States
| | - Anubama Rajan
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States
| | - Donna M. Muzny
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, Unites States
| | - Harsha Doddapaneni
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, Unites States
| | - Vipin K. Menon
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, Unites States
| | - Kristi L. Hoffman
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States
| | - Matthew C. Ross
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, Unites States
| | - Sara J. Javornik Cregeen
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States
| | - Ginger Metcalf
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, Unites States
| | - Richard A. Gibbs
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, Unites States
| | - Joseph F. Petrosino
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States
| | - Pedro A. Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, Unites States,Department of Pediatrics, Baylor College of Medicine, Houston, TX, Unites States
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5
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Blunck BN, Angelo LS, Henke D, Avadhanula V, Cusick M, Ferlic-Stark L, Zechiedrich L, Gilbert BE, Piedra PA. Adult Memory T Cell Responses to the Respiratory Syncytial Virus Fusion Protein During a Single RSV Season (2018-2019). Front Immunol 2022; 13:823652. [PMID: 35422803 PMCID: PMC9002099 DOI: 10.3389/fimmu.2022.823652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 03/02/2022] [Indexed: 11/13/2022] Open
Abstract
Respiratory Syncytial Virus (RSV) is ubiquitous and re-infection with both subtypes (RSV/A and RSV/B) is common. The fusion (F) protein of RSV is antigenically conserved, induces neutralizing antibodies, and is a primary target of vaccine development. Insight into the breadth and durability of RSV-specific adaptive immune response, particularly to the F protein, may shed light on susceptibility to re-infection. We prospectively enrolled healthy adult subjects (n = 19) and collected serum and peripheral blood mononuclear cells (PBMCs) during the 2018–2019 RSV season. Previously, we described their RSV-specific antibody responses and identified three distinct antibody kinetic profiles associated with infection status: uninfected (n = 12), acutely infected (n = 4), and recently infected (n = 3). In this study, we measured the longevity of RSV-specific memory T cell responses to the F protein following natural RSV infection. We stimulated PBMCs with overlapping 15-mer peptide libraries spanning the F protein derived from either RSV/A or RSV/B and found that memory T cell responses mimic the antibody responses for all three groups. The uninfected group had stable, robust memory T cell responses and polyfunctionality. The acutely infected group had reduced polyfunctionality of memory T cell response at enrollment compared to the uninfected group, but these returned to comparable levels by end-of-season. The recently infected group, who were unable to maintain high levels of RSV-specific antibody following infection, similarly had decreased memory T cell responses and polyfunctionality during the RSV season. We observed subtype-specific differences in memory T cell responses and polyfunctionality, with RSV/A stimulating stronger memory T cell responses with higher polyfunctionality even though RSV/B was the dominant subtype in circulation. A subset of individuals demonstrated an overall deficiency in the generation of a durable RSV-specific adaptive immune response. Because memory T cell polyfunctionality may be associated with protection against re-infection, this latter group would likely be at greater risk of re-infection. Overall, these results expand our understanding of the longevity of the adaptive immune response to the RSV fusion protein and should be considered in future vaccine development efforts.
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Affiliation(s)
- Brittani N Blunck
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Laura S Angelo
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - David Henke
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Matthew Cusick
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Laura Ferlic-Stark
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Lynn Zechiedrich
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States.,Verna and Marrs McLean Department of Biochemistry and Molecular Biology, Baylor College of Medicine, Houston, TX, United States.,Department of Pharmacology and Chemical Biology, Baylor College of Medicine, Houston, TX, United States
| | - Brian E Gilbert
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States
| | - Pedro A Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, United States.,Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States
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6
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Doddapaneni H, Cregeen SJ, Sucgang R, Meng Q, Qin X, Avadhanula V, Chao H, Menon V, Nicholson E, Henke D, Piedra FA, Rajan A, Momin Z, Kottapalli K, Hoffman KL, Sedlazeck FJ, Metcalf G, Piedra PA, Muzny DM, Petrosino JF, Gibbs RA. Oligonucleotide capture sequencing of the SARS-CoV-2 genome and subgenomic fragments from COVID-19 individuals. PLoS One 2021; 16:e0244468. [PMID: 34432798 PMCID: PMC8386831 DOI: 10.1371/journal.pone.0244468] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 08/09/2021] [Indexed: 02/06/2023] Open
Abstract
The newly emerged and rapidly spreading SARS-CoV-2 causes coronavirus disease 2019 (COVID-19). To facilitate a deeper understanding of the viral biology we developed a capture sequencing methodology to generate SARS-CoV-2 genomic and transcriptome sequences from infected patients. We utilized an oligonucleotide probe-set representing the full-length genome to obtain both genomic and transcriptome (subgenomic open reading frames [ORFs]) sequences from 45 SARS-CoV-2 clinical samples with varying viral titers. For samples with higher viral loads (cycle threshold value under 33, based on the CDC qPCR assay) complete genomes were generated. Analysis of junction reads revealed regions of differential transcriptional activity among samples. Mixed allelic frequencies along the 20kb ORF1ab gene in one sample, suggested the presence of a defective viral RNA species subpopulation maintained in mixture with functional RNA in one sample. The associated workflow is straightforward, and hybridization-based capture offers an effective and scalable approach for sequencing SARS-CoV-2 from patient samples.
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Affiliation(s)
- Harsha Doddapaneni
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Sara Javornik Cregeen
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Richard Sucgang
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Qingchang Meng
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Xiang Qin
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Hsu Chao
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Vipin Menon
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Erin Nicholson
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Pediatrics, Baylor College of Medicine, Houston, Texas, United States of America
| | - David Henke
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Felipe-Andres Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Anubama Rajan
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Zeineen Momin
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Kavya Kottapalli
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Kristi L. Hoffman
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Fritz J. Sedlazeck
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Ginger Metcalf
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Pedro A. Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Pediatrics, Baylor College of Medicine, Houston, Texas, United States of America
| | - Donna M. Muzny
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Joseph F. Petrosino
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Richard A. Gibbs
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
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7
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Doddapaneni H, Cregeen SJ, Sucgang R, Meng Q, Qin X, Avadhanula V, Chao H, Menon V, Nicholson E, Henke D, Piedra FA, Rajan A, Momin Z, Kottapalli K, Hoffman KL, Sedlazeck FJ, Metcalf G, Piedra PA, Muzny DM, Petrosino JF, Gibbs RA. Oligonucleotide Capture Sequencing of the SARS-CoV-2 Genome and Subgenomic Fragments from COVID-19 Individuals. bioRxiv 2020:2020.12.11.421057. [PMID: 33330863 PMCID: PMC7743067 DOI: 10.1101/2020.12.11.421057] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The newly emerged and rapidly spreading SARS-CoV-2 causes coronavirus disease 2019 (COVID-19). To facilitate a deeper understanding of the viral biology we developed a capture sequencing methodology to generate SARS-CoV-2 genomic and transcriptome sequences from infected patients. We utilized an oligonucleotide probe-set representing the full-length genome to obtain both genomic and transcriptome (subgenomic open reading frames [ORFs]) sequences from 45 SARS-CoV-2 clinical samples with varying viral titers. For samples with higher viral loads (cycle threshold value under 33, based on the CDC qPCR assay) complete genomes were generated. Analysis of junction reads revealed regions of differential transcriptional activity and provided evidence of expression of ORF10. Heterogeneous allelic frequencies along the 20kb ORF1ab gene suggested the presence of a defective interfering viral RNA species subpopulation in one sample. The associated workflow is straightforward, and hybridization-based capture offers an effective and scalable approach for sequencing SARS-CoV-2 from patient samples.
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Affiliation(s)
- Harsha Doddapaneni
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Sara Javornik Cregeen
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Richard Sucgang
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Qingchang Meng
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Xiang Qin
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Houston, Texas, United States of America, USA
| | - Hsu Chao
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Vipin Menon
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Erin Nicholson
- Department of Molecular Virology and Microbiology, Houston, Texas, United States of America, USA
- Pediatrics, Baylor College of Medicine, Houston, Texas, United States of America, USA
| | - David Henke
- Department of Molecular Virology and Microbiology, Houston, Texas, United States of America, USA
| | - Felipe-Andres Piedra
- Department of Molecular Virology and Microbiology, Houston, Texas, United States of America, USA
| | - Anubama Rajan
- Department of Molecular Virology and Microbiology, Houston, Texas, United States of America, USA
| | - Zeineen Momin
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Kavya Kottapalli
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Kristi L. Hoffman
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Fritz J. Sedlazeck
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Ginger Metcalf
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Pedro A. Piedra
- Department of Molecular Virology and Microbiology, Houston, Texas, United States of America, USA
- Pediatrics, Baylor College of Medicine, Houston, Texas, United States of America, USA
| | - Donna M. Muzny
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
| | - Joseph F. Petrosino
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, United States of America
| | - Richard A. Gibbs
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas, United States of America
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8
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Doddapaneni H, Cregeen SJ, Sucgang R, Meng Q, Qin X, Avadhanula V, Chao H, Menon V, Nicholson E, Henke D, Piedra FA, Rajan A, Momin Z, Kottapalli K, Hoffman KL, Sedlazeck FJ, Metcalf G, Piedra PA, Muzny DM, Petrosino JF, Gibbs RA. Oligonucleotide capture sequencing of the SARS-CoV-2 genome and subgenomic fragments from COVID-19 individuals. bioRxiv 2020:2020.07.27.223495. [PMID: 32766579 PMCID: PMC7402036 DOI: 10.1101/2020.07.27.223495] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The newly emerged and rapidly spreading SARS-CoV-2 causes coronavirus disease 2019 (COVID-19). To facilitate a deeper understanding of the viral biology we developed a capture sequencing methodology to generate SARS-CoV-2 genomic and transcriptome sequences from infected patients. We utilized an oligonucleotide probe-set representing the full-length genome to obtain both genomic and transcriptome (subgenomic open reading frames [ORFs]) sequences from 45 SARS-CoV-2 clinical samples with varying viral titers. For samples with higher viral loads (cycle threshold value under 33, based on the CDC qPCR assay) complete genomes were generated. Analysis of junction reads revealed regions of differential transcriptional activity and provided evidence of expression of ORF10. Heterogeneous allelic frequencies along the 20kb ORF1ab gene suggested the presence of a defective interfering viral RNA species subpopulation in one sample. The associated workflow is straightforward, and hybridization-based capture offers an effective and scalable approach for sequencing SARS-CoV-2 from patient samples.
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Affiliation(s)
- Harsha Doddapaneni
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Sara Javornik Cregeen
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Richard Sucgang
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Qingchang Meng
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Xiang Qin
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Vasanthi Avadhanula
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Hsu Chao
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Vipin Menon
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Erin Nicholson
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA, 77030
| | - David Henke
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Felipe-Andres Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Anubama Rajan
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Zeineen Momin
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Kavya Kottapalli
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Kristi L. Hoffman
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Fritz J. Sedlazeck
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Ginger Metcalf
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Pedro A. Piedra
- Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Donna M. Muzny
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Joseph F. Petrosino
- Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX, USA, 77030
| | - Richard A. Gibbs
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA, 77030
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9
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Vossaert L, Wang Q, Salman R, McCombs A, Henke D, Qu C, Bi W, Levy B, Yang Y, Shaw C, Wapner R, Breman A, Van den Veyver I, Beaudet A. 900: A pilot validation study for cell-based noninvasive prenatal testing (NIPT) in 42 cases. Am J Obstet Gynecol 2019. [DOI: 10.1016/j.ajog.2018.11.924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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10
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Henke D, Drögemüller M, Leeb T, Schweizer D, Steffen F, Demierre S, Dickinson P, Vandevelde M, Oevermann A. Familial diffuse astrocytoma (of gliomatosis cerebri type) in bearded collies. J Comp Pathol 2019. [DOI: 10.1016/j.jcpa.2018.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Vossaert L, Wang Q, Salman R, Zhuo X, Qu C, Henke D, Seubert R, Chow J, U'ren L, Enright B, Stilwell J, Kaldjian E, Yang Y, Shaw C, Levy B, Wapner R, Breman A, Van den Veyver I, Beaudet A. Reliable detection of subchromosomal deletions and duplications using cell-based noninvasive prenatal testing. Prenat Diagn 2018; 38:1069-1078. [PMID: 30357877 PMCID: PMC6587831 DOI: 10.1002/pd.5377] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 09/04/2018] [Accepted: 10/13/2018] [Indexed: 12/19/2022]
Abstract
Objective To gather additional data on the ability to detect subchromosomal abnormalities of various sizes in single fetal cells isolated from maternal blood, using low‐coverage shotgun next‐generation sequencing for cell‐based noninvasive prenatal testing (NIPT). Method Fetal trophoblasts were recovered from approximately 30 mL of maternal blood using maternal white blood cell depletion, density‐based cell separation, immunofluorescence staining, and high‐resolution scanning. These trophoblastic cells were picked as single cells and underwent whole genome amplification for subsequent genome‐wide copy number analysis and genotyping to confirm the fetal origin of the cells. Results Applying our fetal cell isolation method to a series of 125 maternal blood samples, we detected on average 4.17 putative fetal cells/sample. The series included 15 cases with clinically diagnosed fetal aneuploidies and five cases with subchromosomal abnormalities. This method was capable of detecting findings that were 1 to 2 Mb in size, and all were concordant with the microarray or karyotype data obtained on a fetal sample. A minority of fetal cells showed evidence of genome degradation likely related to apoptosis. Conclusion We demonstrate that this cell‐based NIPT method has the capacity to reliably diagnose fetal chromosomal abnormalities down to 1 to 2 Mb in size. What is already known about this topic?
Fetal trophoblastic cells can be isolated from maternal blood and be used for the detection of fetal aneuploidies and copy number variants. The data on the detection of subchromosomal deletions and duplications is currently limited.
What does this study add?
Cell‐based NIPT can be used for the detection of copy number abnormalities of greater than or equal to 1 Mb in the fetus by low‐coverage next‐generation sequencing after single cell whole genome amplification. Data are provided here for five cases in which different subchromosomal deletions and duplications ranging from 1.2 to 18.9 Mb were detected in single cells.
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Affiliation(s)
- Liesbeth Vossaert
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Qun Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Roseen Salman
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Xinming Zhuo
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Chunjing Qu
- Baylor Genetics Laboratory, Houston, TX, USA
| | - David Henke
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | | | | | | | | | - Jackie Stilwell
- RareCyte Inc., Seattle, WA, USA.,Immune Design, Seattle, WA, USA
| | | | - Yaping Yang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Chad Shaw
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Brynn Levy
- Department of Pathology and Cell Biology, Columbia University Medical Center, New York, NY, USA
| | - Ronald Wapner
- Department of Obstetrics and Gynecology, Columbia University Medical Center, New York, NY, USA
| | - Amy Breman
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Ignatia Van den Veyver
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Department of Obstetrics and Gynecology, Baylor College of Medicine, Houston, TX, USA
| | - Arthur Beaudet
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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12
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Whitley M, Henke D, Simon L, Vesci J, Holinstat M, Nieman M, Shaw C, Bray P, Edelstein L. Abstract 015: PAR4 Ala120Thr Variant Alters PAR4 Desensitization, Sensitivity to Platelet Antagonists and Risk of Large Vessel Stroke. Arterioscler Thromb Vasc Biol 2018. [DOI: 10.1161/atvb.38.suppl_1.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
F2RL3
encodes protease-activated receptor 4 (PAR4) and harbors a A/G SNP (rs773902) with racially dimorphic allelic frequencies. This SNP mediates an alanine to threonine substitution at residue 120 that alters platelet PAR4 activation by the artificial PAR4-activation peptide (PAR4-AP), AYPGKF, which does not occur in vivo. Platelet function studies from healthy human donors demonstrated that compared to rs773902 GG donors, platelets from rs773902 AA donors had increased aggregation to low concentrations (<1 nM) of thrombin, increased Ca
2+
signaling, increased granule secretion and decreased PAR4 desensitization. The increased thrombin sensitivity of rs773902 AA platelets required both PAR4 and PAR1. Whereas receptor cleavage, dimerization, or lipid raft localization were not different between platelets from the two
F2RL3
genotypes, rs773902 AA platelets required more than 3-fold amounts of PAR4-AP for receptor desensitization. PAR4-AP stimulation of PAR4-transfected COS-7 cells
increased
PAR4 levels on the cell surface. Thrombin-stimulated platelets from rs773902 AA donors displayed reduced inhibition by P2Y12 and PAR1 blockers, but not aspirin. Finally, the association of rs773902 alleles with stroke was assessed using the Stroke Genetics Network (SiGN) study. Patients carrying at least one copy of the rs773902 A allele had an increased risk of both large vessel stroke and diabetes in the SiGN dataset. In summary, both PAR4 and PAR1 are required for platelet activation to sub-nanomolar thrombin concentrations. Compared to rs773902 GG platelets, rs773902 AA platelets have a lower EC50 for thrombin and are relatively resistant to receptor desensitization, perhaps due to anterograde trafficking of internal PAR4 to the plasma membrane post-stimulation. The association of the rs773902 A variant with large vessel stroke, diabetes and partial resistance to PAR1 and P2Y12 inhibition must be considered for development of personalized anti-platelet agents.
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Affiliation(s)
| | | | | | | | | | | | - Chad Shaw
- Baylor College of Medicine, Houston, TX
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13
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Minor KM, Letko A, Becker D, Drögemüller M, Mandigers PJJ, Bellekom SR, Leegwater PAJ, Stassen QEM, Putschbach K, Fischer A, Flegel T, Matiasek K, Ekenstedt KJ, Furrow E, Patterson EE, Platt SR, Kelly PA, Cassidy JP, Shelton GD, Lucot K, Bannasch DL, Martineau H, Muir CF, Priestnall SL, Henke D, Oevermann A, Jagannathan V, Mickelson JR, Drögemüller C. Canine NAPEPLD-associated models of human myelin disorders. Sci Rep 2018; 8:5818. [PMID: 29643404 PMCID: PMC5895582 DOI: 10.1038/s41598-018-23938-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Accepted: 03/20/2018] [Indexed: 01/05/2023] Open
Abstract
Canine leukoencephalomyelopathy (LEMP) is a juvenile-onset neurodegenerative disorder of the CNS white matter currently described in Rottweiler and Leonberger dogs. Genome-wide association study (GWAS) allowed us to map LEMP in a Leonberger cohort to dog chromosome 18. Subsequent whole genome re-sequencing of a Leonberger case enabled the identification of a single private homozygous non-synonymous missense variant located in the highly conserved metallo-beta-lactamase domain of the N-acyl phosphatidylethanolamine phospholipase D (NAPEPLD) gene, encoding an enzyme of the endocannabinoid system. We then sequenced this gene in LEMP-affected Rottweilers and identified a different frameshift variant, which is predicted to replace the C-terminal metallo-beta-lactamase domain of the wild type protein. Haplotype analysis of SNP array genotypes revealed that the frameshift variant was present in diverse haplotypes in Rottweilers, and also in Great Danes, indicating an old origin of this second NAPEPLD variant. The identification of different NAPEPLD variants in dog breeds affected by leukoencephalopathies with heterogeneous pathological features, implicates the NAPEPLD enzyme as important in myelin homeostasis, and suggests a novel candidate gene for myelination disorders in people.
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Affiliation(s)
- K M Minor
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, 55108, USA
| | - A Letko
- Institute of Genetics, University of Bern, Bern, 3001, Switzerland
| | - D Becker
- Institute of Genetics, University of Bern, Bern, 3001, Switzerland
| | - M Drögemüller
- Institute of Genetics, University of Bern, Bern, 3001, Switzerland
| | - P J J Mandigers
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, 3508, CM, The Netherlands
| | - S R Bellekom
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, 3508, CM, The Netherlands
| | - P A J Leegwater
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, 3508, CM, The Netherlands
| | - Q E M Stassen
- Department of Clinical Sciences of Companion Animals, Utrecht University, Utrecht, 3508, CM, The Netherlands
| | - K Putschbach
- Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, Munich, 80539, Germany
| | - A Fischer
- Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, Munich, 80539, Germany
| | - T Flegel
- Department of Small Animal Medicine, University of Leipzig, Leipzig, 04103, Germany
| | - K Matiasek
- Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University, Munich, 80539, Germany
| | - K J Ekenstedt
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN, 47907, USA
| | - E Furrow
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, 55108, USA
| | - E E Patterson
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, 55108, USA
| | - S R Platt
- Small Animal Medicine and Surgery, University of Georgia, Athens, GA, 30602, USA
| | - P A Kelly
- Veterinary Sciences Centre, University College Dublin, Dublin, D04 V1W8, Ireland
| | - J P Cassidy
- Veterinary Sciences Centre, University College Dublin, Dublin, D04 V1W8, Ireland
| | - G D Shelton
- Department of Pathology, University of California, La Jolla, CA, 92093, USA
| | - K Lucot
- Department of Population Health and Reproduction, University of California-Davis, Davis, CA, 95616, USA
| | - D L Bannasch
- Department of Population Health and Reproduction, University of California-Davis, Davis, CA, 95616, USA
| | - H Martineau
- Pathobiology and Population Sciences, The Royal Veterinary College, North Mymms, AL9 7TA, UK
| | - C F Muir
- Pathobiology and Population Sciences, The Royal Veterinary College, North Mymms, AL9 7TA, UK
| | - S L Priestnall
- Pathobiology and Population Sciences, The Royal Veterinary College, North Mymms, AL9 7TA, UK
| | - D Henke
- Division of Clinical Neurology, University of Bern, Bern, 3001, Switzerland
| | - A Oevermann
- Division of Neurological Sciences, University of Bern, Bern, 3001, Switzerland
| | - V Jagannathan
- Institute of Genetics, University of Bern, Bern, 3001, Switzerland
| | - J R Mickelson
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, 55108, USA
| | - C Drögemüller
- Institute of Genetics, University of Bern, Bern, 3001, Switzerland.
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14
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Högler S, Mauri N, Kleiter M, Leschnik M, Oevermann A, Henke D, Dietschi E, Wiedmer M, Dietrich J, Steffen F, Schuller S, Gurtner C, Stokar-Regenscheit N, O'Toole D, Bilzer T, Herden C, Jagannathan V, Leeb T. Genetic Variants in Kcnj10 and Atp1b2 in Malinois Puppies with Spongy Degeneration and Cerebellar Ataxia. J Comp Pathol 2018. [DOI: 10.1016/j.jcpa.2017.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Züger L, Fadda A, Oevermann A, Forterre F, Vandevelde M, Henke D. Differences in Epidural Pathology between Cervical and Thoracolumbar Intervertebral Disk Extrusions in Dogs. J Vet Intern Med 2017; 32:305-313. [PMID: 29194770 PMCID: PMC5787202 DOI: 10.1111/jvim.14887] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 09/06/2017] [Accepted: 10/23/2017] [Indexed: 11/27/2022] Open
Abstract
Background Although the basic pathophysiology is the same in both cervical and thoracolumbar intervertebral disk (IVD) extrusions, there are considerable clinical differences that have only been partially explained. Hypothesis/Objectives The epidural inflammatory response differs between cervical and thoracolumbar IVD extrusions. Animals Fifty‐five dogs with cervical and 80 dogs with thoracolumbar IVD extrusions. Methods Clinical data and histopathologic variables were investigated. Associations between severity of epidural inflammation and clinical and pathologic variables, impact of chondrodystrophic phenotype, and localization (cervical versus thoracolumbar) were evaluated statistically. Results Dogs with cervical IVD extrusion were significantly older (P < 0.001), had less severe and longer duration of neurologic signs (both P < 0.001), were more painful (P = 0.038), and had a better outcome (P = 0.005) than dogs with a thoracolumbar IVD extrusion. On histopathology, cervical epidural material had less severe calcification (P = 0.002) and inflammation (P < 0.001). No significant differences regarding chondrodystrophic phenotype were found. Conclusion and Clinical Importance There was significantly less intensive inflammatory response in the cervical epidural space. This observation correlated positively with less nucleus pulposus calcification in cervical extrusions indicating biochemical, metabolic, and biomechanical differences between the 2 locations, which remain to be characterized in future studies.
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Affiliation(s)
- L Züger
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - A Fadda
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - A Oevermann
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - F Forterre
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Small Animal Surgery, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - M Vandevelde
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - D Henke
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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16
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Mayer D, Oevermann A, Seuberlich T, Vandevelde M, Casanova-Nakayama A, Selimovic-Hamza S, Forterre F, Henke D. Endothelin-1 Immunoreactivity and its Association with Intramedullary Hemorrhage and Myelomalacia in Naturally Occurring Disk Extrusion in Dogs. J Vet Intern Med 2016; 30:1099-111. [PMID: 27353293 PMCID: PMC5094511 DOI: 10.1111/jvim.14364] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2015] [Revised: 03/04/2016] [Accepted: 05/23/2016] [Indexed: 01/28/2023] Open
Abstract
Background The pathophysiology of ascending/descending myelomalacia (ADMM) after canine intervertebral disk (IVD) extrusion remains poorly understood. Vasoactive molecules might contribute. Hypothesis/Objectives To investigate the immunoreactivity of endothelin‐1 (ET‐1) in the uninjured and injured spinal cord of dogs and its potential association with intramedullary hemorrhage and extension of myelomalacia. Animals Eleven normal control and 34 dogs with thoracolumbar IVD extrusion. Methods Spinal cord tissue of dogs retrospectively selected from our histopathologic database was examined histologically at the level of the extrusion (center) and in segments remote from the center. Endothelin‐1 immunoreactivity was examined immunohistochemically and by in situ hybridization. Associations between the immunoreactivity for ET‐1 and the severity of intramedullary hemorrhage or the extension of myelomalacia were examined. Results Endothelin‐1 was expressed by astrocytes, macrophages, and neurons and only rarely by endothelial cells in all dogs. At the center, ET‐1 immunoreactivity was significantly higher in astrocytes (median score 4.02) and lower in neurons (3.21) than in control dogs (3.0 and 4.54) (P < .001; P = .004) irrespective of the grade of hemorrhage or myelomalacia. In both astrocytes and neurons, there was a higher ET‐1 immunoreactivity in spinal cord regions remote from the center (4.58 and 4.15) than in the center itself (P = .013; P = .001). ET‐1 mRNA was present in nearly all neurons with variable intensity, but not in astrocytes. Conclusion and Clinical Importance Enhanced ET‐1 immunoreactivity over multiple spinal cord segments after IVD extrusion might play a role in the pathogenesis of ADMM. More effective quantitative techniques are required.
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Affiliation(s)
- D Mayer
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - A Oevermann
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - T Seuberlich
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - M Vandevelde
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - A Casanova-Nakayama
- Centre for Fish and Wildlife Health, Institute of Animal Pathology, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - S Selimovic-Hamza
- Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - F Forterre
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Small Animal Surgery, Vetsuisse Faculty, University of Bern, Bern, Switzerland
| | - D Henke
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland.,Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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Fadda A, Vajtai I, Lang J, Henke D, Oevermann A. Cerebral high-grade oligodendroglioma with sarcomatous transdifferentiation ("oligosarcoma") in a boxer dog. J Vet Intern Med 2016; 28:1881-5. [PMID: 25410956 PMCID: PMC4895619 DOI: 10.1111/jvim.12457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2014] [Revised: 07/10/2014] [Accepted: 08/13/2014] [Indexed: 11/26/2022] Open
Affiliation(s)
- A Fadda
- Division of Neurological Sciences, Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Berne, Switzerland
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18
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Syrjä P, Jokinen T, Kyöstilä K, Hultin-Jäderlund K, Cozzi F, Rhodin C, Hahn K, Wohlsein P, Baumgärtner W, Henke D, Oevermann A, Sukura A, Leeb T, Lohi H. Histopathological Findings in Lagotto Romagnolo Dogs with a Missense Change in the Autophagy-Related Atg4d Gene. J Comp Pathol 2016. [DOI: 10.1016/j.jcpa.2015.10.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Blatter M, Haase B, Gerber V, Poncet PA, Leeb T, Rieder S, Henke D, Janett F, Burger D. [Clinical evaluation of the new coat colour macchiato in a male Franches-Montagnes horse]. SCHWEIZ ARCH TIERH 2015; 155:229-32. [PMID: 23531944 DOI: 10.1024/0036-7281/a000451] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In April 2008 a Franches-Montagnes colt was born with an unusual coat colour phenotype which had never been observed in that population before. The foal showed extended white markings on body and legs, a white head and blue eyes. As both parents have an unremarkable bay coat colour phenotype, a de novo mutation was expected in the offspring and a candidate gene approach revealed a spontaneous mutation in the microphthalmia associated transcription factor gene (MITF). A detailed clinical examination in 2010 indicated an impaired hearing capacity. As in the American Paint Horse large white facial markings in combination with blue eyes are associated with deafness, the hearing capacity of the stallion was closer examined performing brainstem auditory-evoked responses (BAER). The BAER confirmed bilateral deafness in the Franches-Montagnes colt. It is assumed that the deafness is caused by a melanocyte deficiency caused by the MITF gene mutation. Unfortunately, due to castration of the horse, the causal association between the mutation in the MITF gene and clinical findings cannot be confirmed by experimental matings.
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Affiliation(s)
- M Blatter
- Institut Suisse de Médicine Equine, ALP-Haras und Universität Bern.
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20
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Henke D, Rupp S, Gaschen V, Stoffel M, Vandevelde M, Oevermann A. Intracerebral Spread of Listeria monocytogenes in Ruminants Occurs by Intra-axonal Motility. J Comp Pathol 2015. [DOI: 10.1016/j.jcpa.2014.10.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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21
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Salger F, Stahl C, Vandevelde M, Piersigilli A, Henke D. Multifocal ischemic brain infarctions secondary to spontaneous basilar artery occlusion in a dog with systemic thromboembolic disease. J Vet Intern Med 2014; 28:1875-80. [PMID: 25273268 PMCID: PMC4895622 DOI: 10.1111/jvim.12447] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/09/2014] [Accepted: 07/30/2014] [Indexed: 11/30/2022] Open
Affiliation(s)
- F Salger
- Division of Neurological Sciences, Vetsuisse Faculty, University of Bern, Bern, Switzerland; Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern, Switzerland; Department of Clinical Veterinary Medicine, Vetsuisse Faculty, University of Bern, Bern, Switzerland
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22
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Abstract
The present article gives a survey over the current scientific knowledge of the canine neuronal ceroid-lipofuscinosis (NCL). NCL is a heterogenous group of lysosomal storage diseases in humans and animals. In consequence of a gene mutation, there is an accumulation of ceroid-lipofuscin in neurons, cells of the retina and the skin and other cells. The stored ceroid-lipofuscin in neurons leads to an impaired cell function and subsequently to cell death. Recently, the underlying genetic defect was discovered in several dog breeds. Genetic testing permits an ante mortem diagnosis of the disease, which up to now was only possible with a positive biopsy result. Another advantage is the identification of carrier animals to eliminate the deleterious alleles.
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Affiliation(s)
- P Karli
- Departement für klinische Veterinärmedizin, Abteilung für neurologische Wissenschaften, Vetsuisse-Fakultät, Universität Bern
| | - A Karol
- Institut für Veterinärpathologie, Vetsuisse-Fakultät, Universität Zürich
| | - A Oevermann
- DCR-VPH, Abteilung für neurologische Wissenschaften
| | - C Drögemüller
- Institut für Genetik, Vetsuisse-Fakultät, Universität Bern
| | - D Gorgas
- Departement für klinische Veterinärmedizin, Abteilung für Radiologie, Vetsuisse-Fakultät, Universität Bern
| | - D Henke
- Departement für klinische Veterinärmedizin, Abteilung für neurologische Wissenschaften, Vetsuisse-Fakultät, Universität Bern
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Bittermann S, Lang J, Henke D, Howard J, Gorgas D. Magnetic resonance imaging signs of presumed elevated intracranial pressure in dogs. Vet J 2014; 201:101-8. [DOI: 10.1016/j.tvjl.2014.04.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2013] [Revised: 03/17/2014] [Accepted: 04/30/2014] [Indexed: 11/30/2022]
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Henke D, Vandevelde M, Doherr MG, Stöckli M, Forterre F. Correlations between severity of clinical signs and histopathological changes in 60 dogs with spinal cord injury associated with acute thoracolumbar intervertebral disc disease. Vet J 2013; 198:70-5. [PMID: 23702280 DOI: 10.1016/j.tvjl.2013.04.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Revised: 04/03/2013] [Accepted: 04/07/2013] [Indexed: 11/18/2022]
Abstract
The outcome of spinal surgery in dogs with absent voluntary motor function and nociception following intervertebral disc (IVD) herniation is highly variable, which likely attests to differences in the severity of spinal cord damage. This retrospective study evaluated the extent to which neurological signs correlated with histologically detected spinal cord damage in 60 dogs that were euthanased because of thoracolumbar IVD herniation. Clinical neurological grades correlated significantly with the extent of white matter damage (P<0.001). However, loss of nociception also occurred in 6/31 (19%) dogs with relatively mild histological changes. The duration of clinical signs, Schiff-Sherrington posture, loss of reflexes and pain on spinal palpation were not significantly associated with the severity of spinal cord damage. Although clinical-pathological correlation was generally good, some clinical signs frequently thought to indicate severe cord injury did not always correlate with the degree of cord damage, suggesting functional rather than structural impairment in some cases.
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Affiliation(s)
- D Henke
- Department of Clinical Veterinary Medicine, Division of Clinical Neurology, Vetsuisse Faculty, University of Bern, Bern 3001, Switzerland.
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25
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Fadda A, Oevermann A, Vandevelde M, Doherr MG, Forterre F, Henke D. Clinical and pathological analysis of epidural inflammation in intervertebral disk extrusion in dogs. J Vet Intern Med 2013; 27:924-34. [PMID: 23647367 DOI: 10.1111/jvim.12095] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Revised: 02/11/2013] [Accepted: 03/14/2013] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Little is known about the pathologic changes in the epidural space after intervertebral disk (IVD) extrusion in the dog. OBJECTIVES To analyze the pathology of the epidural inflammatory response, and to search for correlations between this process and clinical findings. METHODS Clinical data from 105 chondrodystrophic (CD) and nonchondrodystrophic (NCD) dogs with IVD extrusion were recorded. Epidural material from these dogs was examined histopathologically and immunohistochemically. Using statistical analysis, we searched for correlations between severity of epidural inflammation and various clinical and pathologic variables. RESULTS Most dogs exhibited an epidural inflammatory response, ranging from acute invasion of neutrophils to formation of chronic granulation tissue. The mononuclear inflammatory infiltrates consisted mostly of monocytes and macrophages and only few T and B cells. Surprisingly, chronic inflammatory patterns also were found in animals with an acute clinical history. Severity of the epidural inflammation correlated with degree of the epidural hemorrhage and nucleus pulposus calcification (P = .003 and .040), but not with age, chondrodystrophic phenotype, neurologic grade, back pain, pretreatment, or duration. The degree of inflammation was statistically (P = .021) inversely correlated with the ability to regain ambulation. CONCLUSION AND CLINICAL IMPORTANCE Epidural inflammation occurs in the majority of dogs with IVD extrusion and may develop long before the onset of clinical signs. Presence of calcified IVD material and hemorrhage in the epidural space may be the triggers of this lesion rather than an adaptive immune response to the nucleus pulposus as suggested in previous studies. Because epidural inflammation may affect outcome, further research is warranted.
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Affiliation(s)
- A Fadda
- Division of Neurological Sciences, University of Bern, Bern, Switzerland.
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26
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Richter K, Burch L, Chao F, Henke D, Jiang C, Daly J, Zhao ML, Kissling G, Diaz M. Altered pattern of immunoglobulin hypermutation in mice deficient in Slip-GC protein. J Biol Chem 2012; 287:31856-65. [PMID: 22833677 DOI: 10.1074/jbc.m112.340661] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We recently identified a novel germinal center GTPase, SLIP-GC, that localizes to replication factories in B cells and that, when reduced, induces DNA breaks in lymphoma B cell lines in an activation-induced deaminase (AID)-dependent manner. Herein, we generated mice deficient in SLIP-GC and examined the impact of SLIP-GC deficiency in immunoglobulin hypermutation and class switch recombination, both AID-dependent mechanisms. SLIP-GC-deficient mice experienced a substantial increase in mutations at G:C base pairs at the region downstream of JH4 in the immunoglobulin heavy chain locus. This change was reflected in the overall mutation frequency, and it was associated with an increase in transitions from G:C base pairs, a hallmark of AID-mediated deamination during replication. In addition, G:C transitions at non-immunoglobulin loci also increased in these mice. Given the intracellular localization of SLIP-GC to sites of replicating DNA, these results suggest that SLIP-GC protects replicating DNA from AID-mediated deamination of cytosines in both strands.
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Affiliation(s)
- Kathleen Richter
- Somatic Hypermutation Group, NIEHS, National Institutes of Health, Research Triangle Park, North Carolina 27709, USA
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27
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Henke D, Vandevelde M, Stoffel M, Zurbriggen A, Oevermann A. Intracerebral Spread of Listeria monocytogenes along Axons in Rhombencephalitis of Ruminants. J Comp Pathol 2012. [DOI: 10.1016/j.jcpa.2011.11.087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Shaheen NJ, Crockett SD, Bright SD, Madanick RD, Buckmire R, Couch M, Dellon ES, Galanko JA, Sharpless G, Morgan DR, Spacek MB, Heidt-Davis P, Henke D. Randomised clinical trial: high-dose acid suppression for chronic cough - a double-blind, placebo-controlled study. Aliment Pharmacol Ther 2011; 33:225-34. [PMID: 21083673 PMCID: PMC3073617 DOI: 10.1111/j.1365-2036.2010.04511.x] [Citation(s) in RCA: 109] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Cough may be a manifestation of gastro-oesophageal reflux disease (GERD). The utility of acid suppression in GERD-related cough is uncertain. AIM To assess the impact of high-dose acid suppression with proton pump inhibitors (PPI) on chronic cough in subjects with rare or no heartburn. METHODS Subjects were nonsmokers without history of asthma, with chronic cough for >8 weeks. All subjects underwent a baseline 24-h pH/impedance study, methacholine challenge test and laryngoscopy. Subjects were randomised to either 40 mg of esomeprazole twice daily or placebo for 12 weeks. The primary outcome measure was the Cough-Specific Quality of Life Questionnaire (CQLQ). Secondary outcomes were response on Fisman Cough Severity/Frequency scores and change in laryngeal findings. RESULTS Forty subjects were randomised (22 PPI, 18 placebo) and completed the study. There was no difference between PPI and placebo in CQLQ (mean improvement 9.8 vs. 5.9 respectively, P = 0.3), or Fisman Cough Severity/Frequency scores. Proportion of patients who improved by >1 s.d. on the CQLQ was 27.8% (five of 18) and 31.8% (seven of 22) in the placebo and PPI groups respectively. CONCLUSION In subjects with chronic cough and rare or no heartburn, high-dose proton pump inhibitor does not improve cough-related quality of life or symptoms.
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Affiliation(s)
- Nicholas J. Shaheen
- Center for Esophageal Diseases and Swallowing, University of North Carolina at Chapel Hill, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Seth D. Crockett
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Stephanie D. Bright
- Center for Esophageal Diseases and Swallowing, University of North Carolina at Chapel Hill, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Ryan D. Madanick
- Center for Esophageal Diseases and Swallowing, University of North Carolina at Chapel Hill, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Robert Buckmire
- Department of Head and Neck Surgery, University of North Carolina at Chapel Hill
| | - Marion Couch
- Department of Head and Neck Surgery, University of North Carolina at Chapel Hill
| | - Evan S. Dellon
- Center for Esophageal Diseases and Swallowing, University of North Carolina at Chapel Hill, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Joseph A. Galanko
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Ginny Sharpless
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Douglas R. Morgan
- Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Melissa B. Spacek
- Center for Esophageal Diseases and Swallowing, University of North Carolina at Chapel Hill, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - Paris Heidt-Davis
- Center for Esophageal Diseases and Swallowing, University of North Carolina at Chapel Hill, Division of Gastroenterology and Hepatology, University of North Carolina at Chapel Hill
| | - David Henke
- Division of Pulmonary and Critical Care Medicine, University of North Carolina at Chapel Hill
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Syring C, Drögemüller C, Oevermann A, Pfister P, Henke D, Müller S, Sölkner J, Leeb T, Meylan M. Degenerative axonopathy in a Tyrolean grey calf. J Vet Intern Med 2010; 24:1519-23. [PMID: 21039865 DOI: 10.1111/j.1939-1676.2010.0607.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- C Syring
- Clinic for Ruminants, Vetsuisse Faculty, University of Berne, Berne, Switzerland
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Abstract
An 18-month-old European shorthair cat was presented with a two week history of progressive decrease in consciousness, ambulatory tetraparesis, moderate ataxia and generalised decreased-to-absent postural reactions. Bilateral facial and nasal hypalgesia, absent menace response and anisocoria were found, and segmental spinal reflexes were normal. Neurological signs progressed to nonambulatory tetraparesis, tremor and spinal hyperalgesia. Histopathological examination revealed a mild-to-moderate lymphoplasmacytic and histiocytic infiltration, predominantly in the dorsal spinal roots, cranial nerves and ganglia in association with marked demyelination and proliferation of Schwann cells. Neurons and axons were preserved. Lesions were multi-focal and varied in severity. A predominantly sensory polyganglioradiculoneuritis was diagnosed. This lesion has not been reported previously in cats. Rabies, herpesviruses, feline infectious peritonitis, feline immunodeficiency virus, Toxoplasma gondii and feline leukaemia virus were excluded as possible aetiologies. Infections by other viruses or an autoimmune disease are discussed.
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Affiliation(s)
- D Henke
- Department of Clinical Veterinary Medicine, Division of Clinical Neurology, Vetsuisse Faculty, University of Berne, Berne, Switzerland
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Henke D, Vandevelde M, Gorgas D, Lang J, Oevermann A. Eosinophilic Granulomatous Meningoencephalitis in 2 Young Belgian Tervueren Shepherd Dogs. J Vet Intern Med 2009; 23:206-10. [DOI: 10.1111/j.1939-1676.2009.0247.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Henke D, Hecht A. Chylothorax und Ascites chylosus bei neurinomatöser Hamartie im Bereich des Ductus thoracicus. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-0028-1101523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Kreusch J, Rassner G, Trahn C, Pietsch-Breitfeld B, Henke D, Selbmann HK. Epiluminescent microscopy: a score of morphological features to identify malignant melanoma. Pigment Cell Res 2008; Suppl 2:295-8. [PMID: 1409432 DOI: 10.1111/j.1600-0749.1990.tb00388.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- J Kreusch
- Medical University of Lübeck, Clinic of Dermatology, Germany
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35
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Henke D, Böttcher P, Doherr M, Oechtering G, Flegel T. Computer-Assisted Magnetic Resonance Imaging Brain Morphometry in American Staffordshire Terriers with Cerebellar Cortical Degeneration. J Vet Intern Med 2008; 22:969-75. [DOI: 10.1111/j.1939-1676.2008.0138.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Abstract
Three Bavarian mountain dogs aged between 18 and 20 months, not related to each other, were presented with chronic signs of cerebellar dysfunction. On sagittal T2-weighted magnetic resonance imaging brain images, the tentative diagnosis of cerebellar hypoplasia was established based on an enlarged cerebrospinal fluid space around the cerebellum and an increased cerebrospinal fluid signal between the folia. Post-mortem examination was performed in one dog and did show an overall reduction of cerebellar size. On histopathologic examination, a selective loss of cerebellar granule cells with sparing of Purkinje cells was evident. Therefore, the Bavarian mountain dog is a breed where cerebellar cortical degeneration caused by the rather exceptional selective granule cell loss can be seen as cause of chronic, slowly progressive cerebellar dysfunction starting at an age of several months.
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Affiliation(s)
- T Flegel
- Department of Small Animal Medicine, University of Leipzig, An den Tierkliniken 23, 04103 Leipzig, Germany
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38
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Schwab U, Gilligan P, Jaynes J, Henke D. In vitro activities of designed antimicrobial peptides against multidrug-resistant cystic fibrosis pathogens. Antimicrob Agents Chemother 1999; 43:1435-40. [PMID: 10348766 PMCID: PMC89292 DOI: 10.1128/aac.43.6.1435] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The emergence of multidrug-resistant pathogens renders antibiotics ineffective in the treatment of lung infections in patients with cystic fibrosis (CF). Designed antimicrobial peptides (DAPs) are laboratory-synthesized peptide antibiotics that demonstrate a wide spectrum of antibacterial activity. Optimal conditions for susceptibility testing of these peptides have not yet been established. Medium composition is clearly a major factor influencing the results and reproducibilities of susceptibility tests. Using time-kill assays, we tested the effects of different media and buffers on the bactericidal activities of the peptides D2A21 and D4E1 on Staphylococcus aureus ATCC 29213 and Pseudomonas aeruginosa ATCC 27853. Each peptide at 1 and 5 microM was incubated with bacteria in the different media and buffers. Both peptides were most active in Tris-HCl buffer against S. aureus and P. aeruginosa. Among the more complex media tested, modified RPMI medium was the medium in which the peptides demonstrated the highest activity, while it supported the growth of the bacteria. The broth microdilution technique was used to test the activities of D2A21 and D4E1 in modified RPMI medium against multidrug-resistant pathogens from patients with CF. The MICs of DAPs for methicillin-resistant S. aureus ranged from 0.25 to 4 microg/ml, those for multidrug-resistant P. aeruginosa ranged from 0.125 to 4 microg/ml, those for Stenotrophomonas maltophilia ranged from 0.5 to 32 microg/ml, and those for Burkholderia cepacia ranged from 32 to >/=64 microg/ml. When the activity of peptide D2A21 was compared with that of the tracheal antimicrobial peptide (TAP), D2A21 had greater potency than TAP against P. aeruginosa. In addition, no difference in the MICs of D2A21 was seen when it was tested in nutrient broth supplemented with NaCl at different concentrations. Thus, DAPs are a class of salt-insensitive antibiotics potentially useful in the treatment of CF patients harboring multidrug-resistant P. aeruginosa.
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Affiliation(s)
- U Schwab
- Demegen Inc., Pittsburgh, Pennsylvania 15221, USA
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Neubeck M, Henke D, Spahn-Langguth H, Mutschler E. Simultaneous determination of (R)- and (S)-brefanolol in human plasma: high-performance liquid chromatographic assay on a chiral stationary phase. Arch Pharm (Weinheim) 1994; 327:193-6. [PMID: 8179478 DOI: 10.1002/ardp.19943270312] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A new method for the quantitative enantiospecific determination of rac-brefanolol, a vasodilating beta-adrenoceptor blocking agent, in human plasma is described. After an alkaline liquid-liquid extraction from biological material and a preseparation on a silica gel column with fractional collection of the eluate, the separation of the underivatized enantiomers is performed by high-performance liquid chromatography on cellulose tris-4-methylbenzoic acid polymer coated on silica gel. The UV-absorbance of the eluate was monitored at 254 nm. Determination limits are 10 ng enantiomer per ml plasma and allow the performance of pharmacokinetic studies after the aimed therapeutic dosages.
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Affiliation(s)
- M Neubeck
- Pharmakologisches Institut für Naturwissenschaftler der Johann Wolfgang Goethe-Universität am Main, Germany
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40
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Neubeck M, Becker C, Henke D, Rösch W, Spahn-Langguth H, Mutschler E. Pharmacokinetics of dilevalol and its conjugates in man. Assay method for plasma, blood, urine and bile samples and preliminary pharmacokinetic studies. Arzneimittelforschung 1993; 43:953-7. [PMID: 8240457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The renal and biliary excretion of the beta-adrenoceptor blocking agent dilevalol (CAS 75659-07-3) and its conjugates was examined in a preliminary pharmacokinetic study. Plasma, urine and bile dilevalol concentrations were determined with a simplified procedure that is based on alkaline liquid-liquid extraction using diethyl ether and subsequent reversed-phase HPLC separation of the reconstituted samples (on a PRP-1 stationary phase using a mixture of methanol and pH 9.8 carbonate buffer as mobile phase). Triamterene was used as internal standard. The quantification of the conjugates was accomplished indirectly via enzymatic hydrolysis (glusulase) with and without addition of the beta-glucuronidase inhibitor 1,4-saccharolactone (at a final concentration of 5.5 mmol/l). In the pharmacokinetic study healthy volunteers and cholecystectomised patients with a T-drain received a single oral dose of 200 mg dilevalol. Furthermore, to healthy volunteers an i.v. dose of 60 mg dilevalol was given in order to estimate the absolute bioavailability. From the obtained data the systemic plasma clearance was calculated to be 1708 ml/min. The oral bioavailability was calculated to be 16%. The log concentration-time curves of the metabolites paralleled those of dilevalol in the terminal section with average terminal half-lives of approx. 5 h. In volunteers the fractions of the dose excreted renally were 0.5% for parent drug, 23% for the glucuronide(s) and 8% for the sulfate. The corresponding values found for the patients were not significantly different. In the patients' bile only 1.2% of the total dose were found (0.03% dilevalol, 1.1% dilevalol glucuronide(s), 0.1% dilevalol sulfate).(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- M Neubeck
- Pharmakologisches Institut für Naturwissenschaftler, Johann Wolfgang Goethe-Universität, Frankfurt/Main, Fed. Rep. of Germany
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Abstract
The maternofetal transfer of the beta 1-selective adrenergic antagonist celiprolol has been studied in four hypertensive pregnant women. Fetal plasma concentrations were about 25-50% of the levels found on the maternal side. There was no significant difference between the plasma concentrations of the two enantiomers in the child. Therefore, in further investigations only the racemate needs to be determined.
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Affiliation(s)
- B Kofahl
- Department of Pharmacology, University of Frankfurt/Main, Germany
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Stahl E, Henke D, Mutschler E, Spahn-Langguth H. Saturable enantioselective first-pass effect for carvedilol after high oral racemate doses in rats. Arch Pharm (Weinheim) 1993; 326:123-5. [PMID: 8097624 DOI: 10.1002/ardp.19933260302] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Carvedilol shows a highly enantioselective first-pass extraction after therapeutic p.o. doses with preferential extraction of the S-enantiomer. To investigate, whether the enantioselective first-pass metabolism is saturable, male Sprague-Dawley rats were administered increasing single doses of R/S-carvedilol (p.o., 5-30 mg/kg; i.v., 5 and 10 mg/kg), and the individual stereopharmacokinetics were studied. Like in humans the plasma concentrations of R-carvedilol exceeded always those of S-carvedilol. As expected, a dose-dependent reduction in oral clearance was observed, while the total clearance after the i.v. doses was constant. Beyond 20 mg/kg an increased plasma half-life was found for both enantiomers, which is due to a reduced plasma clearance.
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Affiliation(s)
- E Stahl
- Pharmakologisches Institut für Naturwissenschaftler, Johann Wolfgang Goethe-Universität, Frankfurt/Main, Germany
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43
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Abstract
The simultaneous determination of the enantiomers of the beta1-selective adrenergic antagonist atenolol in human plasma and urine is described. After an alkaline pre-extraction atenolol is extracted from biological material at pH 12.3 using dichloromethane/propan-2-ol. The separation of the underivatized enantiomers is achieved by high-performance liquid chromatography on a chiral stationary phase (Chiralcel OD, cellulose tris-3,5-dimethylphenylcarbamate, coated on silica gel) with fluorimetric detection. (--)-)S)-Pindolol is used as an internal standard. The detection limits of 5 ng/ml enantiomer in plasma and 50 ng/ml enantiomer in urine are sufficient for pharmacokinetic studies after therapeutic doses.
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Affiliation(s)
- B Kofahl
- Department of Pharmacology, Johann Wolfgang Goethe University, Frankfurt am Main, Germany
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Stahl E, Baumgartner U, Henke D, Schölmerich J, Mutschler E, Spahn-Langguth H. Rats with portacaval shunt as a potential experimental pharmacokinetic model for liver cirrhosis: application to carvedilol stereopharmacokinetics. Chirality 1993; 5:1-7. [PMID: 8095396 DOI: 10.1002/chir.530050102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
As an experimental model for reduced liver function rats with surgical portacaval shunts (pcs) may be used. Carvedilol, a nonselective beta-adrenoceptor antagonist with vasodilating activity, is extensively metabolised by phase I as well as phase II pathways. In order to study the stereoselective pharmacokinetics of carvedilol in liver disease, pcs and control rats were given rac-carvedilol intravenously and p.o. The carvedilol enantiomers and their conjugates were assayed in plasma, urine, and bile. Carvedilol was highly bound to plasma proteins; binding was reduced by pcs. In all groups, the plasma concentrations of (R)-carvedilol exceeded those of (S)-carvedilol significantly. In comparison to the control group the plasma concentrations of both enantiomers increased after pcs, while the difference between the stereoisomers decreased. The total clearance decreased proportionally to the decrease in liver weight (30%). Both the apparent oral clearance, as well as its stereoselectivity were reduced, by up to 90 and 43%, respectively. The biliary clearance of the parent drug after i.v. dosage increased in rats with pcs due to the reduced hepatic metabolism.
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Affiliation(s)
- E Stahl
- Department of Pharmacology, Johann Wolfgang Goethe University, Frankfurt am Main, Germany
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Liebmann B, Henke D, Spahn-Langguth H, Mutschler E. Determination of the quaternary compound ciclotropium in human biological material after hydrolysis and derivatization with the fluorophor flunoxaprofen chloride. J Chromatogr 1991; 572:181-93. [PMID: 1818053 DOI: 10.1016/0378-4347(91)80482-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The quantitative determination of the quaternary spasmolytic compound ciclotropium and its metabolite N-isopropyltropinium is described for human plasma and urine. The analytical procedure consists of ion-pair extraction from biological material, alkaline hydrolysis, subsequent derivatization with the fluorophor flunoxaprofen chloride and separation by high-performance liquid chromatography on a reversed-phase column with fluorimetric monitoring. The detection limits of 0.5 ng/ml in plasma and 10 ng/ml in urine at signal-to-noise ratios higher than 3 permit the determination of pharmacokinetic parameters after therapeutic doses.
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Affiliation(s)
- B Liebmann
- Pharmakologisches Institut für Naturwissenschaftler, Johann Wolfgang Goethe-Universität, Frankfurt am Main, Germany
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Abstract
Nasal and bronchial epithelium from normal human nasal turbinates was isolated from surgical specimens and used to study arachidonic acid metabolism. High-performance liquid chromatography analysis of cell incubations in the presence of calcium ionophore, A23187, showed the formation of 15-lipoxygenase products. The major arachidonic acid metabolite with bronchial and nasal tissue was 15-HETE identified by uv spectroscopy, coelution with the authentic standards by HPLC, and GC-mass spectrometry. The second major metabolite, formed from either arachidonic acid or 15-HPETE, was identified as 13-hydroxy-14,15-epoxy-5,8,11-eicosatetraenoic acid (15-alpha-HEPA) by uv spectroscopy, coelution with the authentic standard, and GC-mass spectrometry. In addition, two 8,15-diHETEs and two 8,15-LTs were identified by uv spectroscopy and coelution with the authentic standards by HPLC on both reverse-phase and normal-phase HPLC. Also isolated and identified were 14,15-diHETEs, and 12-HETE. Nasal epithelial cells appear to be more active than nasal bronchial cells in oxidizing arachidonic acid. However, the profile of metabolites from these normal tissue preparations was similar. The addition of 15-lipoxygenase products to nasal epithelium weakly stimulated Cl- ion secretion. These studies indicate that human pulmonary epithelial cells selectively oxidize arachidonic acid to 15-lipoxygenase metabolites.
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Affiliation(s)
- D Henke
- Laboratory of Molecular Biophysics, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709
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Abstract
1. Arachidonic acid metabolism by respiratory epithelial cells either freshly isolated or maintained in culture is discussed. 2. A comparison is made between rat, rabbit, canine and human cells and illustrates the considerable variation in the metabolism between various species. 3. The relationship between arachidonic acid metabolism and ion movement in these cells is reviewed.
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Affiliation(s)
- T E Eling
- Laboratory of Molecular Biophysics, National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709
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Henke D, Danilowicz R, Eling T. Arachidonic acid metabolism by isolated epidermal basal and differentiated keratinocytes from the hairless mouse. Biochim Biophys Acta 1986; 876:271-9. [PMID: 2420365 DOI: 10.1016/0005-2760(86)90284-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The metabolism of arachidonic acid was studied using basal and differentiated keratinocytes as well as sebaceous cells isolated from hairless mice. These disassociated cells metabolized arachidonic acid predominantly to the prostaglandin H synthase products prostaglandins E2 and D2. 12-Hydroxyheptadecatrienoic acid (HHT), prostaglandin F2 alpha, thromboxane B2 and 6-ketoprostaglandin F1 alpha were also detected. Smaller amounts of the lipoxygenase products 5-, 12- and 15-hydroxyeicosatetraenoic acids (HETEs) were also detected. The major lipoxygenase product observed was 12-HETE. No leukotrienes or dihydroxy fatty acids were observed. The identity of the metabolites was established using several high-pressure liquid chromatography solvent systems. The biosynthesis of prostaglandins E2 and D2 was very rapid and was inhibited by the addition of indomethacin to the cells. The mixed population of keratinocytes and sebaceous cells were separated into enriched fractions by metrizamide gradients and elutriation techniques. The small, undifferentiated cells had high prostaglandin H synthase and 12-lipoxygenase activity. The basal cell-enriched fractions had the highest activity. With increasing differentiation of the cells, decreased biosynthetic activity was observed. These results indicate that undifferentiated keratinocytes, that is, the basal cells, may be an important source of prostaglandins and 12-HETE but are not a source of leukotrienes for the hairless mouse. It also suggests a role for keratinocyte-derived eicosanoids in the normal physiology of epidermal differentiation.
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