1
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Williams HM, Thorkelsson SR, Vogel D, Busch C, Milewski M, Cusack S, Grünewald K, Quemin ERJ, Rosenthal M. Structural snapshots of phenuivirus cap-snatching and transcription. Nucleic Acids Res 2024:gkae330. [PMID: 38709882 DOI: 10.1093/nar/gkae330] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 04/10/2024] [Accepted: 04/19/2024] [Indexed: 05/08/2024] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a human pathogen that is now endemic to several East Asian countries. The viral large (L) protein catalyzes viral transcription by stealing host mRNA caps via a process known as cap-snatching. Here, we establish an in vitro cap-snatching assay and present three high-quality electron cryo-microscopy (cryo-EM) structures of the SFTSV L protein in biologically relevant, transcription-specific states. In a priming-state structure, we show capped RNA bound to the L protein cap-binding domain (CBD). The L protein conformation in this priming structure is significantly different from published replication-state structures, in particular the N- and C-terminal domains. The capped-RNA is positioned in a way that it can feed directly into the RNA-dependent RNA polymerase (RdRp) ready for elongation. We also captured the L protein in an early-elongation state following primer-incorporation demonstrating that this priming conformation is retained at least in the very early stages of primer extension. This structural data is complemented by in vitro biochemical and cell-based assays. Together, these insights further our mechanistic understanding of how SFTSV and other bunyaviruses incorporate stolen host mRNA fragments into their viral transcripts thereby allowing the virus to hijack host cell translation machinery.
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Affiliation(s)
- Harry M Williams
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology, Hamburg, Germany
| | - Sigurdur R Thorkelsson
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology, Hamburg, Germany
- University of Hamburg, Hamburg, Germany
| | - Dominik Vogel
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | - Carola Busch
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | - Morlin Milewski
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | | | - Kay Grünewald
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology, Hamburg, Germany
- University of Hamburg, Hamburg, Germany
| | - Emmanuelle R J Quemin
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology, Hamburg, Germany
- Department of Virology, Institute for Integrative Biology of the Cell (I2BC), Centre National de la Recherche Scientifique (CNRS) UMR9198, Gif-sur-Yvette, France
| | - Maria Rosenthal
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Hamburg, Germany
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2
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Jilke S, Keppeler F, Ternovski J, Vogel D, Yoeli E. Policy makers believe money motivates more than it does. Sci Rep 2024; 14:1901. [PMID: 38253624 PMCID: PMC10803740 DOI: 10.1038/s41598-024-51590-x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 01/07/2024] [Indexed: 01/24/2024] Open
Abstract
To motivate contributions to public goods, should policy makers employ financial incentives like taxes, fines, subsidies, and rewards? While these are widely considered as the classic policy approach, a substantial academic literature suggests the impact of financial incentives is not always positive; they can sometimes fail or even backfire. To test whether policy makers are overly bullish about financial incentives, we asked county heads, mayors, and municipal government representatives of medium-to-large towns in Germany to predict the effects of a financial incentive on COVID-19 vaccination, and tested the exact same incentive in a field experiment involving all 41,548 inhabitants (clustered in 10,032 addresses) of the German town of Ravensburg. Whereas policy makers overwhelmingly predict that the financial incentive will increase vaccination-by 15.3 percentage points on average-the same financial incentive yielded a precisely estimated null effect on vaccination. We discuss when financial incentives are most likely to fail, and conclude that it is critical to educate policy makers on the potential pitfalls of employing financial incentives to promote contributions to public goods.
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Affiliation(s)
| | - Florian Keppeler
- Aarhus University, Bartholins Allé 7, 8000, Aarhus C, Denmark
- Zeppelin University, Fallenbrunnen 3, 88045, Friedrichshafen, Germany
| | - John Ternovski
- U.S. Airforce Academy, 2354 Fairchild Drive, Air Force Academy, CO, 80840, Germany
| | - Dominik Vogel
- University of Hamburg, Von-Melle-Park 9, 20146, Hamburg, Germany
| | - Erez Yoeli
- Massachusetts Institute of Technology, 100 Main Street, Cambridge, MA, 02142, USA
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3
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Sänger L, Williams HM, Yu D, Vogel D, Kosinski J, Rosenthal M, Uetrecht C. RNA to Rule Them All: Critical Steps in Lassa Virus Ribonucleoparticle Assembly and Recruitment. J Am Chem Soc 2023; 145:27958-27974. [PMID: 38104324 PMCID: PMC10755698 DOI: 10.1021/jacs.3c07325] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 11/16/2023] [Accepted: 11/17/2023] [Indexed: 12/19/2023]
Abstract
Lassa virus is a negative-strand RNA virus with only four structural proteins that causes periodic outbreaks in West Africa. The nucleoprotein (NP) encapsidates the viral genome, forming ribonucleoprotein complexes (RNPs) together with the viral RNA and the L protein. RNPs must be continuously restructured during viral genome replication and transcription. The Z protein is important for membrane recruitment of RNPs, viral particle assembly, and budding and has also been shown to interact with the L protein. However, the interaction of NP, viral RNA, and Z is poorly understood. Here, we characterize the interactions between Lassa virus NP, Z, and RNA using structural mass spectrometry. We identify the presence of RNA as the driver for the disassembly of ring-like NP trimers, a storage form, into monomers to subsequently form higher order RNA-bound NP assemblies. We locate the interaction site of Z and NP and demonstrate that while NP binds Z independently of the presence of RNA, this interaction is pH-dependent. These data improve our understanding of RNP assembly, recruitment, and release in Lassa virus.
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Affiliation(s)
- Lennart Sänger
- Bernhard
Nocht Institute for Tropical Medicine, Bernhard-Nocht-Straße 74, 20359 Hamburg, Germany
- CSSB
Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany
- Leibniz
Institute of Virology (LIV), Notkestraße 85, 22607 Hamburg, Germany
| | - Harry M. Williams
- Bernhard
Nocht Institute for Tropical Medicine, Bernhard-Nocht-Straße 74, 20359 Hamburg, Germany
- CSSB
Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany
| | - Dingquan Yu
- CSSB
Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany
- European
Molecular Biology Laboratory Notkestraße 85, 22607 Hamburg, Germany
| | - Dominik Vogel
- Bernhard
Nocht Institute for Tropical Medicine, Bernhard-Nocht-Straße 74, 20359 Hamburg, Germany
| | - Jan Kosinski
- CSSB
Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany
- European
Molecular Biology Laboratory Notkestraße 85, 22607 Hamburg, Germany
- Structural
and Computational Biology Unit, European
Molecular Biology Laboratory, Meyerhofstraße 1, 69117 Heidelberg, Germany
| | - Maria Rosenthal
- Bernhard
Nocht Institute for Tropical Medicine, Bernhard-Nocht-Straße 74, 20359 Hamburg, Germany
- CSSB
Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany
- Fraunhofer
Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Schnackenburgallee 114, 22525 Hamburg, Germany
| | - Charlotte Uetrecht
- CSSB
Centre for Structural Systems Biology, Notkestraße 85, 22607 Hamburg, Germany
- Leibniz
Institute of Virology (LIV), Notkestraße 85, 22607 Hamburg, Germany
- Faculty
V: School of Life Sciences, University of
Siegen, Am Eichenhang 50, 57076 Siegen, Germany
- Deutsches
Elektronen-Synchrotron (DESY), Notkestr. 85, 22607 Hamburg, Germany
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4
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Scherf J, Vogel D, Gul S, Reinshagen J, Gribbon P, Rosenthal M. Limited high-throughput screening compatibility of the phenuivirus cap-binding domain. Sci Rep 2023; 13:22820. [PMID: 38129678 PMCID: PMC10739838 DOI: 10.1038/s41598-023-50158-5] [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: 07/29/2023] [Accepted: 12/15/2023] [Indexed: 12/23/2023] Open
Abstract
Bunyaviruses constitute a large and diverse group of viruses encompassing many emerging pathogens, such as Rift Valley fever virus (family Phenuiviridae), with public and veterinary health relevance but with very limited medical countermeasures are available. For the development of antiviral strategies, the identification and validation of virus-specific targets would be of high value. The cap-snatching mechanism is an essential process in the life cycle of bunyaviruses to produce capped mRNAs, which are then recognized and translated into viral proteins by the host cell translation machinery. Cap-snatching involves cap-binding as well as endonuclease functions and both activities have been demonstrated to be druggable in related influenza viruses. Here, we explore the suitability of the phenuivirus cap-binding function as a target in medium- and high-throughput drug discovery approaches. We developed a range of in vitro assays aiming to detect the interaction between the cap-binding domain (CBD) and the analogue of its natural cap-ligand m7GTP. However, constricted by its shallow binding pocket and low affinity for m7GTP, we conclude that the CBD has limited small molecule targeting potential using classical in vitro drug discovery approaches.
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Affiliation(s)
- Janna Scherf
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Dominik Vogel
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
| | - Sheraz Gul
- Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Hamburg, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern Kai 7, 60590, Frankfurt, Germany
| | - Jeanette Reinshagen
- Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Hamburg, Germany
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern Kai 7, 60590, Frankfurt, Germany
| | - Philip Gribbon
- Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Hamburg, Germany.
- Fraunhofer Cluster of Excellence for Immune-Mediated Diseases (CIMD), Theodor Stern Kai 7, 60590, Frankfurt, Germany.
| | - Maria Rosenthal
- Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.
- Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Hamburg, Germany.
- Center for Structural Systems Biology, Hamburg, Germany.
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5
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Meier K, Thorkelsson SR, Durieux Trouilleton Q, Vogel D, Yu D, Kosinski J, Cusack S, Malet H, Grünewald K, Quemin ERJ, Rosenthal M. Structural and functional characterization of the Sin Nombre virus L protein. PLoS Pathog 2023; 19:e1011533. [PMID: 37549153 PMCID: PMC10406178 DOI: 10.1371/journal.ppat.1011533] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Accepted: 07/04/2023] [Indexed: 08/09/2023] Open
Abstract
The Bunyavirales order is a large and diverse group of segmented negative-strand RNA viruses. Several virus families within this order contain important human pathogens, including Sin Nombre virus (SNV) of the Hantaviridae. Despite the high epidemic potential of bunyaviruses, specific medical countermeasures such as vaccines or antivirals are missing. The multifunctional ~250 kDa L protein of hantaviruses, amongst other functional domains, harbors the RNA-dependent RNA polymerase (RdRp) and an endonuclease and catalyzes transcription as well as replication of the viral RNA genome, making it a promising therapeutic target. The development of inhibitors targeting these key processes requires a profound understanding of the catalytic mechanisms. Here, we established expression and purification protocols of the full-length SNV L protein bearing the endonuclease mutation K124A. We applied different biochemical in vitro assays to provide an extensive characterization of the different enzymatic functions as well as the capacity of the hantavirus L protein to interact with the viral RNA. By using single-particle cryo-EM, we obtained a 3D model including the L protein core region containing the RdRp, in complex with the 5' promoter RNA. This first high-resolution model of a New World hantavirus L protein shows striking similarity to related bunyavirus L proteins. The interaction of the L protein with the 5' RNA observed in the structural model confirms our hypothesis of protein-RNA binding based on our biochemical data. Taken together, this study provides an excellent basis for future structural and functional studies on the hantavirus L protein and for the development of antiviral compounds.
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Affiliation(s)
- Kristina Meier
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | - Sigurdur R. Thorkelsson
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology (LIV), Hamburg, Germany
| | | | - Dominik Vogel
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | - Dingquan Yu
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- European Molecular Biology Laboratory (EMBL), Hamburg, Germany
| | - Jan Kosinski
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- European Molecular Biology Laboratory (EMBL), Hamburg, Germany
- Structural and Computational Biology Unit, European Molecular Biology Laboratory (EMBL), Heidelberg, Germany
| | - Stephen Cusack
- European Molecular Biology Laboratory (EMBL), Grenoble, France
| | - Hélène Malet
- University Grenoble Alpes, CNRS, CEA, IBS, Grenoble, France
- Institut Universitaire de France (IUF), Paris, France
| | - Kay Grünewald
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology (LIV), Hamburg, Germany
- University of Hamburg, Department of Chemistry, Hamburg, Germany
| | - Emmanuelle R. J. Quemin
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Leibniz Institute of Virology (LIV), Hamburg, Germany
| | - Maria Rosenthal
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
- Centre for Structural Systems Biology (CSSB), Hamburg, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Discovery Research ScreeningPort, Hamburg, Germany
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6
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Böning D, Kuebler WM, Vogel D, Bloch W. The oxygen dissociation curve of blood in COVID-19-An update. Front Med (Lausanne) 2023; 10:1098547. [PMID: 36923010 PMCID: PMC10008909 DOI: 10.3389/fmed.2023.1098547] [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: 11/15/2022] [Accepted: 02/03/2023] [Indexed: 03/02/2023] Open
Abstract
An impressive effect of the infection with SARS-Co-19 is the impairment of oxygen uptake due to lung injury. The reduced oxygen diffusion may potentially be counteracted by an increase in oxygen affinity of hemoglobin. However, hypoxia and anemia associated with COVID-19 usually decrease oxygen affinity due to a rise in [2,3-bisphosphoglycerate]. As such, COVID-19 related changes in the oxygen dissociation curve may be critical for oxygen uptake and supply, but are hard to predict. A Pubmed search lists 14 publications on oxygen affinity in COVID-19. While some investigations show no changes, three large studies found an increased affinity that was related to a good prognosis. Exact causes remain unknown. The cause of the associated anemia in COVID-19 is under discussion. Erythrocytes with structural alterations of membrane and cytoskeleton have been observed, and virus binding to Band 3 and also to ACE2 receptors in erythroblasts has been proposed. COVID-19 presentation is moderate in many subjects suffering from sickle cell disease. A possible explanation is that COVID-19 counteracts the unfavorable large right shift of the oxygen dissociation curve in these patients. Under discussion for therapy are mainly affinity-increasing drugs.
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Affiliation(s)
- Dieter Böning
- Institute of Physiology, Charité Medical University of Berlin, Berlin, Germany
| | - Wolfgang M. Kuebler
- Institute of Physiology, Charité Medical University of Berlin, Berlin, Germany
| | - Dominik Vogel
- Klinik für Interdisziplinäre Intensivmedizin, Vivantes Humboldt-Klinikum, Berlin, Germany
| | - Wilhelm Bloch
- Department of Molecular and Cellular Sport Medicine, Institute of Cardiovascular Research and Sport Medicine, German Sport University Cologne, Cologne, Germany
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7
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Williams HM, Thorkelsson SR, Vogel D, Milewski M, Busch C, Cusack S, Grünewald K, Quemin EJ, Rosenthal M. Structural insights into viral genome replication by the severe fever with thrombocytopenia syndrome virus L protein. Nucleic Acids Res 2023; 51:1424-1442. [PMID: 36651274 PMCID: PMC9943659 DOI: 10.1093/nar/gkac1249] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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: 09/14/2022] [Revised: 11/29/2022] [Accepted: 12/14/2022] [Indexed: 01/19/2023] Open
Abstract
Severe fever with thrombocytopenia syndrome virus (SFTSV) is a phenuivirus that has rapidly become endemic in several East Asian countries. The large (L) protein of SFTSV, which includes the RNA-dependent RNA polymerase (RdRp), is responsible for catalysing viral genome replication and transcription. Here, we present 5 cryo-electron microscopy (cryo-EM) structures of the L protein in several states of the genome replication process, from pre-initiation to late-stage elongation, at a resolution of up to 2.6 Å. We identify how the L protein binds the 5' viral RNA in a hook-like conformation and show how the distal 5' and 3' RNA ends form a duplex positioning the 3' RNA terminus in the RdRp active site ready for initiation. We also observe the L protein stalled in the early and late stages of elongation with the RdRp core accommodating a 10-bp product-template duplex. This duplex ultimately splits with the template binding to a designated 3' secondary binding site. The structural data and observations are complemented by in vitro biochemical and cell-based mini-replicon assays. Altogether, our data provide novel key insights into the mechanism of viral genome replication by the SFTSV L protein and will aid drug development against segmented negative-strand RNA viruses.
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Affiliation(s)
| | | | - Dominik Vogel
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | - Morlin Milewski
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | - Carola Busch
- Bernhard Nocht Institute for Tropical Medicine (BNITM), Hamburg, Germany
| | | | - Kay Grünewald
- Centre for Structural Systems Biology, Leibniz Institute of Virology, Hamburg, Germany,University of Hamburg, Hamburg, Germany
| | - Emmanuelle R J Quemin
- Centre for Structural Systems Biology, Leibniz Institute of Virology, Hamburg, Germany
| | - Maria Rosenthal
- To whom correspondence should be addressed. Tel: +49 40 285380 930;
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8
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Amirkhanyan AA, Meier KJ, Song M, Roberts FW, Park J, Vogel D, Bellé N, Molina AL, Guul TS. Liberté, Égalité, Crédibilité: An experimental study of citizens' perceptions of government responses to COVID-19 in eight countries. Public Adm Rev 2023; 83:PUAR13588. [PMID: 36718222 PMCID: PMC9877892 DOI: 10.1111/puar.13588] [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] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 10/26/2022] [Accepted: 11/18/2022] [Indexed: 06/18/2023]
Abstract
During a global pandemic, individual views of government can be linked to citizens' trust and cooperation with government and their propensity to resist state policies or to take action that influences the course of a pandemic. This article explores citizens' assessments of government responses to COVID-19 as a function of policy substance (restrictions on civil liberties), information about performance, and socioeconomic inequity in outcomes. We conducted a survey experiment and analyzed data on over 7000 respondents from eight democratic countries. We find that across countries, citizens are less favorable toward COVID-19 policies that are more restrictive of civil liberties. Additionally, citizens' views of government performance are significantly influenced by objective performance information from reputable sources and information on the disproportionate impacts of COVID-19 on low-income groups. This study reinforces the importance of policy design and outcomes and the consideration of multiple public values in the implementation of public policies.
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Affiliation(s)
- Anna A. Amirkhanyan
- Department of Public Administration and PolicyAmerican UniversityWashingtonDistrict of ColumbiaUSA
| | - Kenneth J. Meier
- Department of Public Administration and PolicyAmerican University, Cardiff School of Business, and Institute of Public Administration, Leiden UniversityWashingtonDistrict of ColumbiaUSA
| | - Miyeon Song
- School of Public Affairs and AdministrationRutgers University – NewarkNewarkNew JerseyUSA
| | - Fei W. Roberts
- Department of Public Administration and PolicyAmerican UniversityWashingtonDistrict of ColumbiaUSA
| | - Joohyung Park
- Department of Public Administration and PolicyAmerican UniversityWashingtonDistrict of ColumbiaUSA
| | - Dominik Vogel
- Department of SocioeconomicsUniversity of HamburgHamburgGermany
| | - Nicola Bellé
- Institute of ManagementScuola Superiore Sant'AnnaPisaItaly
| | | | - Thorbjørn Sejr Guul
- Department of Political Science and Public ManagementUniversity of Southern DenmarkOdenseDenmark
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9
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Abstract
Mittlerweile gibt es auch in Organisationen des öffentlichen Sektors häufig mehrere IT-Führungsrollen im Top-Management-Team (TMT). Wir wissen bisher aber sehr wenig darüber, wie diese IT-Führungsrollen ausgestaltet sind und wie sie sich voneinander abgrenzen lassen. Dieser Artikel nutzt Job Mining von Stellenausschreibungen im öffentlichen Sektor, um mittels einer qualitativen Inhaltsanalyse Kompetenzen, Verantwortungen und Aufgaben der IT-Führungsrollen zu identifizieren und Handlungsempfehlungen zu formulieren. Während zu den geforderten Kompetenzen von IT-Führungsrollen u. a. ein abgeschlossenes Hochschulstudium, Sprachkenntnisse sowie fach- und verwaltungsbezogene Kenntnisse zählen, zeigen die Verantwortungen verschiedene Ausprägungen. Die Aufgaben sind rollenspezifisch formuliert, zeigen jedoch eine Reihe von Überschneidungen zwischen den IT-Führungsrollen. Diese Überschneidungen legen eine CTO–CDO-Dyade mit übergeordneter CIO-Rolle nahe. Die praktisch ausgerichteten Handlungsempfehlungen umfassen u. a. eine höhere Gewichtung von Englisch- und Digital-Kenntnissen sowie lebenslangem Lernen.
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10
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Willems J, Schmidthuber L, Vogel D, Ebinger F, Vanderelst D. Ethics of robotized public services: The role of robot design and its actions. Government Information Quarterly 2022. [DOI: 10.1016/j.giq.2022.101683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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11
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Correa G, Taylor D, Vogel D, Wyncoll D. A case of broncho-cutaneous fistula secondary to tuberculosis successfully managed with awake veno-venous extracorporeal membrane oxygenation. Respir Med Case Rep 2021; 32:101351. [PMID: 33537201 PMCID: PMC7840998 DOI: 10.1016/j.rmcr.2021.101351] [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: 09/07/2020] [Revised: 12/07/2020] [Accepted: 01/13/2021] [Indexed: 11/28/2022] Open
Abstract
A broncho-cutaneous fistula (BCF) is a communicating tract between the bronchus and the cutaneous surface of the thoracic wall and can be the primary presenting sign of several disease processes. It has been associated with positive pressure ventilation (PPV), post pneumonectomy, thoracostomy tubes, perforating chest trauma, neoplasia and chronic empyema. We report a case of a 45-year-old immunocompetent man presenting with severe hypercapnic respiratory failure secondary to a BCF as a result of tuberculosis (TB)-related empyema necessitans. Veno-venous extracorporeal membrane oxygenation (VV ECMO) was employed during spontaneous breathing to mitigate the risks of PPV, to facilitate diagnostics and enable targeted treatment. Awake VV ECMO is an effective supportive therapy for complex, destructive lung pathologies with a known reversible aetiology in which PPV would be potentially detrimental.
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12
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Wei X, Vogel D, Keller L, Kriescher S, Wessling M. Microtubular Gas Diffusion Electrode Based on Ruthenium‐Carbon Nanotubes for Ambient Electrochemical Nitrogen Reduction to Ammonia. ChemElectroChem 2020. [DOI: 10.1002/celc.202001370] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Xin Wei
- RWTH Aachen University Chemical Process Engineering Forckenbeckstr. 51 52074 Aachen Germany
| | - Dominik Vogel
- RWTH Aachen University Chemical Process Engineering Forckenbeckstr. 51 52074 Aachen Germany
| | - Laura Keller
- RWTH Aachen University Chemical Process Engineering Forckenbeckstr. 51 52074 Aachen Germany
| | - Stefanie Kriescher
- RWTH Aachen University Chemical Process Engineering Forckenbeckstr. 51 52074 Aachen Germany
| | - Matthias Wessling
- RWTH Aachen University Chemical Process Engineering Forckenbeckstr. 51 52074 Aachen Germany
- DWI-Leibniz Institute for Interactive Materials Forckenbeckstr. 50 52074 Aachen Germany
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13
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Vogel D, Thorkelsson SR, Quemin ERJ, Meier K, Kouba T, Gogrefe N, Busch C, Reindl S, Günther S, Cusack S, Grünewald K, Rosenthal M. Structural and functional characterization of the severe fever with thrombocytopenia syndrome virus L protein. Nucleic Acids Res 2020; 48:5749-5765. [PMID: 32313945 PMCID: PMC7261188 DOI: 10.1093/nar/gkaa253] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [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: 02/27/2020] [Revised: 03/31/2020] [Accepted: 04/03/2020] [Indexed: 12/29/2022] Open
Abstract
The Bunyavirales order contains several emerging viruses with high epidemic potential, including Severe fever with thrombocytopenia syndrome virus (SFTSV). The lack of medical countermeasures, such as vaccines and antivirals, is a limiting factor for the containment of any virus outbreak. To develop such antivirals a profound understanding of the viral replication process is essential. The L protein of bunyaviruses is a multi-functional and multi-domain protein performing both virus transcription and genome replication and, therefore, is an ideal drug target. We established expression and purification procedures for the full-length L protein of SFTSV. By combining single-particle electron cryo-microscopy and X-ray crystallography, we obtained 3D models covering ∼70% of the SFTSV L protein in the apo-conformation including the polymerase core region, the endonuclease and the cap-binding domain. We compared this first L structure of the Phenuiviridae family to the structures of La Crosse peribunyavirus L protein and influenza orthomyxovirus polymerase. Together with a comprehensive biochemical characterization of the distinct functions of SFTSV L protein, this work provides a solid framework for future structural and functional studies of L protein-RNA interactions and the development of antiviral strategies against this group of emerging human pathogens.
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Affiliation(s)
- Dominik Vogel
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany
| | - Sigurdur Rafn Thorkelsson
- Centre for Structural Systems Biology, Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, University of Hamburg, Hamburg, Germany
| | - Emmanuelle R J Quemin
- Centre for Structural Systems Biology, Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, University of Hamburg, Hamburg, Germany
| | - Kristina Meier
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany
| | - Tomas Kouba
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France
| | - Nadja Gogrefe
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany
| | - Carola Busch
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany
| | - Sophia Reindl
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany
| | - Stephan Günther
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg - Lübeck - Borstel - Riems, Hamburg 20359, Germany
| | - Stephen Cusack
- European Molecular Biology Laboratory, 71 Avenue des Martyrs, CS 90181, 38042 Grenoble Cedex 9, France
| | - Kay Grünewald
- Centre for Structural Systems Biology, Heinrich-Pette-Institute, Leibniz Institute for Experimental Virology, University of Hamburg, Hamburg, Germany
| | - Maria Rosenthal
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Hamburg 20359, Germany
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Vogel D, Rosenthal M, Gogrefe N, Reindl S, Günther S. Biochemical characterization of the Lassa virus L protein. J Biol Chem 2019; 294:8088-8100. [PMID: 30926610 PMCID: PMC6527160 DOI: 10.1074/jbc.ra118.006973] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/19/2019] [Indexed: 12/25/2022] Open
Abstract
The L protein of arena- and bunyaviruses is structurally and functionally related to the orthomyxovirus polymerase complex. It plays a central role in the viral life cycle, as it replicates the virus genome and generates viral mRNA via a cap-snatching mechanism. Here, we aimed to biochemically characterize the L protein of Lassa virus, a human-pathogenic arenavirus endemic in West Africa. Full-length 250-kDa L protein was expressed using a baculovirus expression system. A low-resolution structure calculated from small-angle X-ray scattering data revealed a conformation similar to that in the crystal structure of the orthomyxovirus polymerase complex. Although the L protein did not exhibit cap-snatching endonuclease activity, it synthesized RNA in vitro. RNA polymerization required manganese rather than magnesium ions, was independent of nucleotide primers, and was inhibited by viral Z protein. Maximum activity was mediated by double-stranded promoter sequences with a minimum length of 17 nucleotides, containing a nontemplated 5′-G overhang, as in the natural genome context, as well as the naturally occurring base mismatches between the complementary promoter strands. Experiments with various short primers revealed the presence of two replication initiation sites at the template strand and evidence for primer translocation as proposed by the prime-and-realign hypothesis. Overall, our findings provide the foundation for a detailed understanding of the mechanistic differences and communalities in the polymerase proteins of segmented negative-strand RNA viruses and for the search for antiviral compounds targeting the RNA polymerase of Lassa virus.
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Affiliation(s)
- Dominik Vogel
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Strasse 74, Hamburg 20359, Germany
| | - Maria Rosenthal
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Strasse 74, Hamburg 20359, Germany
| | - Nadja Gogrefe
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Strasse 74, Hamburg 20359, Germany
| | - Sophia Reindl
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Strasse 74, Hamburg 20359, Germany.
| | - Stephan Günther
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, Bernhard-Nocht-Strasse 74, Hamburg 20359, Germany; German Center for Infection Research (DZIF), Partner site Hamburg-Lübeck-Borstel-Riems, Hamburg 20359, Germany.
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15
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Sitaram R, Yu T, Halsband U, Vogel D, Müller F, Lang S, Birbaumer N, Kotchoubey B. Spatial characteristics of spontaneous and stimulus-induced individual functional connectivity networks in severe disorders of consciousness. Brain Cogn 2018; 131:10-21. [PMID: 30502227 DOI: 10.1016/j.bandc.2018.11.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/29/2018] [Accepted: 11/09/2018] [Indexed: 12/11/2022]
Abstract
BACKGROUND Functional connectivity (fcMRI) analyses of resting state functional magnetic resonance imaging (fMRI) data revealed substantial differences between states of consciousness. The underlying cause-effect linkage, however, remains unknown to the present day. The aim of this study was to examine the relationship between fcMRI measures and Disorders of Consciousness (DOC) in resting state and under adequate stimulation. METHODS AND FINDINGS fMRI data from thirteen patients with unresponsive wakefulness syndrome, eight patients in minimally conscious state, and eleven healthy controls were acquired in rest and during the application of nociceptive and emotional acoustic stimuli. We compared spatial characteristics and anatomical topography of seed-based fcMRI networks on group and individual levels. The anatomical topography of fcMRI networks of patients was altered in all three conditions as compared with healthy controls. Spread and distribution of individual fcMRI networks, however, differed significantly between patients and healthy controls in stimulation conditions only. The exploration of individual metric values identified two patients whose spatial metrics did not deviate from metric distributions of healthy controls in a statistically meaningful manner. CONCLUSIONS These findings suggest that the disturbance of consciousness in DOC is related to deficits in global topographical network organization rather than a principal inability to establish long-distance connections. In addition, the results question the claim that task-free measurements are particularly valuable as a tool for individual diagnostics in severe neurological disorders. Further studies comparing connectivity indices with outcome of DOC patients are needed to determine the clinical relevance of spatial metrics and stimulation paradigms for individual diagnosis, prognosis and treatment in DOC.
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Affiliation(s)
- Ranganatha Sitaram
- Institute of Biological and Medical Engineering, Department of Psychiatry and Section of Neuroscience, and Laboratory for Brain-Machine Interfaces and Neuromodulation, Schools of Engineering, Biology & Medicine, Pontificia Universidad Católica, Chile; Wyss Center for Bio and Neuro Engineering, Biotechnology Campus, Genèva, Switzerland.
| | - Tao Yu
- Clinics for Neurological Rehabilitation "Quellenhof", Bad Wildbad, Germany
| | | | - Dominik Vogel
- Schön Clinics for Neurological Rehabilitation Bad Aibling, Germany
| | | | - Simone Lang
- Department of Clinical Psychology & Psychotherapy, University of Heidelberg, Germany
| | - Niels Birbaumer
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Germany; Wyss Center for Bio and Neuro Engineering, Biotechnology Campus, Genèva, Switzerland
| | - Boris Kotchoubey
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Germany.
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Kerger P, Vogel D, Rohwerder M. Electrochemistry in ultra-high vacuum: The fully transferrable ultra-high vacuum compatible electrochemical cell. Rev Sci Instrum 2018; 89:113102. [PMID: 30501323 DOI: 10.1063/1.5046389] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 10/16/2018] [Indexed: 06/09/2023]
Abstract
A new experimental setup for in situ/operando investigations of redox reactions is introduced. This setup, in combination with ultra-high vacuum (UHV) methods from the field of surface science, provides completely new possibilities to investigate electrochemical redox reactions. Two types of cells are distinguished conceptionally: in the permeation configuration, the working electrode is electrochemically polarised on one side of a membrane (entry side), leading to atomic hydrogen uptake, and allowing proton and electron exchange between the entry and the other side (exit side) of the membrane. Here it is found that the applied potential on the entry side shows a 1:1 correlation with the measured potential on the exit side. The concept of the "window" cell requires ultra-thin, electron transparent "windows," such as single layer graphene, for X-ray photoelectron spectroscopy or X-ray transparent silicon nitride "windows" for X-ray absorption spectroscopy. In this case, the solid/liquid interface can be directly probed under applied potentials. In both configurations, the applied potential is measured with a palladium hydride reference electrode, with so far unseen precision and long-term stability. The cell design is constructed with regard to transferability within a UHV system, allowing sample preparation, and a modular construction, allowing a straightforward changeover between these two configurations. As a first application, an approach based on atomic hydrogen is presented. Further application concepts are discussed. The setup functionality is demonstrated by the example of in situ/operando investigation of the palladium oxide reduction.
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Affiliation(s)
- P Kerger
- Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
| | - D Vogel
- Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
| | - M Rohwerder
- Max-Planck-Institut für Eisenforschung, Düsseldorf, Germany
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17
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Wiedemann A, Smith T, Bettencourt-Silva JH, Vogel D, Clark A, Metcalf AK, Bowles KM, Potter JF, Myint PK. 79CONTRIBUTION OF CO-MORBIDITY BURDEN ON DEMENTIA INCIDENCE AFTER STROKE. Age Ageing 2018. [DOI: 10.1093/ageing/afy135.04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A Wiedemann
- Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
- Institute for Complex Systems and Mathematical Biology, University of Aberdeen, Aberdeen, UK
| | - T Smith
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | | | - D Vogel
- Institute for Complex Systems and Mathematical Biology, University of Aberdeen, Aberdeen, UK
| | - A Clark
- Norwich Medical School, University of East Anglia, UK
| | - A K Metcalf
- Norfolk and Norwich University Hospital, Norwich, UK
- Norwich Medical School, University of East Anglia, UK
| | - K M Bowles
- Norfolk and Norwich University Hospital, Norwich, UK
- Norwich Medical School, University of East Anglia, UK
| | - J F Potter
- Norfolk and Norwich University Hospital, Norwich, UK
- Norwich Medical School, University of East Anglia, UK
| | - P K Myint
- Institute of Applied Health Sciences, University of Aberdeen, Aberdeen, UK
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18
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Tarnowski M, Nuske M, Fläschner N, Rem B, Vogel D, Freystatzky L, Sengstock K, Mathey L, Weitenberg C. Observation of Topological Bloch-State Defects and Their Merging Transition. Phys Rev Lett 2017; 118:240403. [PMID: 28665652 DOI: 10.1103/physrevlett.118.240403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Indexed: 06/07/2023]
Abstract
Topological defects in Bloch bands, such as Dirac points in graphene, and their resulting Berry phases play an important role for the electronic dynamics in solid state crystals. Such defects can arise in systems with a two-atomic basis due to the momentum-dependent coupling of the two sublattice states, which gives rise to a pseudospin texture. The topological defects appear as vortices in the azimuthal phase of this pseudospin texture. Here, we demonstrate a complete measurement of the azimuthal phase in a hexagonal optical lattice employing a versatile method based on time-of-flight imaging after off-resonant lattice modulation. Furthermore, we map out the merging transition of the two Dirac points induced by beam imbalance. Our work paves the way to accessing geometric properties in optical lattices also with spin-orbit coupling and interactions.
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Affiliation(s)
- Matthias Tarnowski
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
| | - Marlon Nuske
- Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
| | - Nick Fläschner
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
| | - Benno Rem
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
| | - Dominik Vogel
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
| | - Lukas Freystatzky
- Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
| | - Klaus Sengstock
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
- Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
| | - Ludwig Mathey
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
- Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
| | - Christof Weitenberg
- Institut für Laserphysik, Universität Hamburg, 22761 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany
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Rosenthal M, Gogrefe N, Vogel D, Reguera J, Rauschenberger B, Cusack S, Günther S, Reindl S. Structural insights into reptarenavirus cap-snatching machinery. PLoS Pathog 2017; 13:e1006400. [PMID: 28505175 PMCID: PMC5444859 DOI: 10.1371/journal.ppat.1006400] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [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: 01/15/2017] [Revised: 05/25/2017] [Accepted: 05/05/2017] [Indexed: 01/15/2023] Open
Abstract
Cap-snatching was first discovered in influenza virus. Structures of the involved domains of the influenza virus polymerase, namely the endonuclease in the PA subunit and the cap-binding domain in the PB2 subunit, have been solved. Cap-snatching endonucleases have also been demonstrated at the very N-terminus of the L proteins of mammarena-, orthobunya-, and hantaviruses. However, a cap-binding domain has not been identified in an arena- or bunyavirus L protein so far. We solved the structure of the 326 C-terminal residues of the L protein of California Academy of Sciences virus (CASV), a reptarenavirus, by X-ray crystallography. The individual domains of this 37-kDa fragment (L-Cterm) as well as the domain arrangement are structurally similar to the cap-binding and adjacent domains of influenza virus polymerase PB2 subunit, despite the absence of sequence homology, suggesting a common evolutionary origin. This enabled identification of a region in CASV L-Cterm with similarity to a cap-binding site; however, the typical sandwich of two aromatic residues was missing. Consistent with this, cap-binding to CASV L-Cterm could not be detected biochemically. In addition, we solved the crystal structure of the corresponding endonuclease in the N-terminus of CASV L protein. It shows a typical endonuclease fold with an active site configuration that is essentially identical to that of known mammarenavirus endonuclease structures. In conclusion, we provide evidence for a presumably functional cap-snatching endonuclease in the N-terminus and a degenerate cap-binding domain in the C-terminus of a reptarenavirus L protein. Implications of these findings for the cap-snatching mechanism in arenaviruses are discussed.
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Affiliation(s)
- Maria Rosenthal
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany
| | - Nadja Gogrefe
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany
| | - Dominik Vogel
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany
| | - Juan Reguera
- Aix-Marseille Université, INSERM, CNRS, AFMB UMR 7257, Marseille, France
| | - Bianka Rauschenberger
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany
| | - Stephen Cusack
- European Molecular Biology Laboratory, Grenoble Outstation, Grenoble, France
| | - Stephan Günther
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany
| | - Sophia Reindl
- Department of Virology, Bernhard-Nocht-Institute for Tropical Medicine, Hamburg, Germany
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Bakkila K, Axelrod B, Kushida C, Rastogi R, Vogel D, Chowdhuri S. 0619 IMPACT OF OSA AND OSA-COPD OVERLAP SYNDROME ON NEUROCOGNITIVE OUTCOMES. Sleep 2017. [DOI: 10.1093/sleepj/zsx050.618] [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: 11/13/2022] Open
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Abstract
Mikroglas is a young, innovative and highly-specialized enterprise, which has special know-how in the development of microstructured glass components. Due to its unique properties, glass plays an important role in the field of microtechnology. Most important for many of these new applications are: • its optical transparency and good fluorescence properties, allowing the user to carry out in-situ-measurements, e.g., to detect products after a chemical reaction directly in the device • its stability at high temperatures so that reactions can be influenced by heating different zones of the device • its chemical resistivity, e.g., to handle aggressive substances • its high electrical resistivity, e.g., to transport liquids by electrophoresis or to carry out electrical measurements • its good biological compatibility which is necessary for medical and biological applications The process of structuring FOTURAN will be described. With this technology different microfluidic devices have been manufactured. The channels have a width and depth of 50 μm up to 1 mm and a length of 20 mm up to 280 mm. Various parameters have been measured, e. g., the heat exchange and transfer coefficient for pure water as a function of the temperature. Also optical and thermal analysis techniques have been used to characterize the fluidic components. The results combined with advanced computational fluidic simulations lead to new solutions for different tasks.
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Affiliation(s)
- A. Freitag
- mgt mikroglas technik AG, Mainz, Germany
| | - D. Vogel
- mgt mikroglas technik AG, Mainz, Germany
| | - R. Scholz
- mgt mikroglas technik AG, Mainz, Germany
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Flaschner N, Rem BS, Tarnowski M, Vogel D, Luhmann DS, Sengstock K, Weitenberg C. Experimental reconstruction of the Berry curvature in a Floquet Bloch band. Science 2016; 352:1091-4. [DOI: 10.1126/science.aad4568] [Citation(s) in RCA: 313] [Impact Index Per Article: 39.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 03/23/2016] [Indexed: 11/02/2022]
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Real RG, Veser S, Erlbeck H, Risetti M, Vogel D, Müller F, Kotchoubey B, Mattia D, Kübler A. Information processing in patients in vegetative and minimally conscious states. Clin Neurophysiol 2016; 127:1395-1402. [DOI: 10.1016/j.clinph.2015.07.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 06/03/2015] [Accepted: 07/05/2015] [Indexed: 11/28/2022]
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Spiel C, Vogel D, Schlögl R, Rupprechter G, Suchorski Y. Spatially coupled catalytic ignition of CO oxidation on Pt: mesoscopic versus nano-scale. Ultramicroscopy 2015; 159 Pt 2:178-83. [PMID: 26021411 PMCID: PMC4691231 DOI: 10.1016/j.ultramic.2015.05.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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: 08/25/2014] [Revised: 12/16/2014] [Accepted: 05/13/2015] [Indexed: 10/25/2022]
Abstract
Spatial coupling during catalytic ignition of CO oxidation on μm-sized Pt(hkl) domains of a polycrystalline Pt foil has been studied in situ by PEEM (photoemission electron microscopy) in the 10(-5) mbar pressure range. The same reaction has been examined under similar conditions by FIM (field ion microscopy) on nm-sized Pt(hkl) facets of a Pt nanotip. Proper orthogonal decomposition (POD) of the digitized FIM images has been employed to analyze spatiotemporal dynamics of catalytic ignition. The results show the essential role of the sample size and of the morphology of the domain (facet) boundary in the spatial coupling in CO oxidation.
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Affiliation(s)
- C Spiel
- Institute of Materials Chemistry, Vienna University of Technology, 1060 Vienna, Austria
| | - D Vogel
- Institute of Materials Chemistry, Vienna University of Technology, 1060 Vienna, Austria; Department of Inorganic Chemistry, Fritz-Haber-Institute of the Max-Planck-Society, 14195 Berlin, Germany
| | - R Schlögl
- Department of Inorganic Chemistry, Fritz-Haber-Institute of the Max-Planck-Society, 14195 Berlin, Germany
| | - G Rupprechter
- Institute of Materials Chemistry, Vienna University of Technology, 1060 Vienna, Austria
| | - Y Suchorski
- Institute of Materials Chemistry, Vienna University of Technology, 1060 Vienna, Austria.
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25
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26
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Affiliation(s)
- Boris Kotchoubey
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tübingen , Germany
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27
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ten Freyhaus H, Vogel D, Lehmann C, Kümmerle T, Wyen C, Fätkenheuer G, Rosenkranz S. Echocardiographic screening for pulmonary arterial hypertension in HIV-positive patients. Infection 2014; 42:737-41. [PMID: 24619834 DOI: 10.1007/s15010-014-0610-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Accepted: 02/28/2014] [Indexed: 12/28/2022]
Abstract
Human immunodeficiency virus (HIV) infection is associated with an increased risk for pulmonary arterial hypertension (PAH). Upon the screening of 220 asymptomatic HIV-positive individuals by echocardiography, we detected and confirmed HIV-associated PAH in 0.45 % of cases. Mild elevations of systolic pulmonary arterial pressure most probably owing to left ventricular diastolic dysfunction were found in 7.7 % of cases, without progress after 2 years. We suggest that the screening of asymptomatic HIV-positive patients for PAH should not be performed.
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Affiliation(s)
- H ten Freyhaus
- Klinik III für Innere Medizin, Herzzentrum der Universität zu Köln, Kerpener Strasse 62, 50937, Cologne, Germany,
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Kotchoubey B, Yu T, Mueller F, Vogel D, Veser S, Lang S. True or false? Activations of language-related areas in patients with disorders of consciousness. Curr Pharm Des 2014; 20:4239-4247. [PMID: 24025064] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 09/05/2013] [Indexed: 06/02/2023]
Abstract
Twenty-nine patients with Unresponsive Wakefulness Syndrome (UWS), 26 patients in Minimally Conscious State (MCS), and 21 healthy control individuals matched in age and social environment (patients' relatives) were presented with 80 short sentences half of which were factually correct, and the other half factually incorrect. The diagnosis was made on the basis of repeated neurological examinations as well as the standardized assessment using a Coma Recovery Scale-Revised (CRS-R). fMRI blood oxygen level dependent signal was recorded in an event-related design time-locked to the end word of the sentences. In the contrast "incorrect-minus-correct" significant activations in the relevant brain regions were obtained in 17 (81%) controls and in 16 (29%) patients. Among patients, the 16 responders had a significantly longer time since accident than the 39 non-responders. Responders and non-responders did not differ in terms of the diagnosis (UWS vs. MCS), age, CRS-R score, or the degree of brain atrophy. The data concur with the results of several earlier studies on UWS/MCS patients, with the difference that the critical stimuli in those studies were semantically incongruent or ambiguous propositions rather than factually false ones in the present experiment. The hypothesis is discussed that the differential response of brain language areas to factually correct and incorrect statements does not require conscious perception of the statements.
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Affiliation(s)
| | | | | | | | | | - Simone Lang
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tuebingen, Germany.
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Vogel D, Markl A, Yu T, Kotchoubey B, Lang S, Müller F. Can Mental Imagery Functional Magnetic Resonance Imaging Predict Recovery in Patients With Disorders of Consciousness? Arch Phys Med Rehabil 2013; 94:1891-8. [DOI: 10.1016/j.apmr.2012.11.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Revised: 11/20/2012] [Accepted: 11/26/2012] [Indexed: 10/26/2022]
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Kotchoubey B, Yu T, Mueller F, Vogel D, Veser S, Lang S. True or false? Activations of language-related areas in patients with disorders of consciousness. Curr Pharm Des 2013. [DOI: 10.2174/13816128113196660645] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Stankewitz A, Valet M, Schulz E, Wöller A, Sprenger T, Vogel D, Zimmer C, Mühlau M, Tölle TR. Pain sensitisers exhibit grey matter changes after repetitive pain exposure: A longitudinal voxel-based morphometry study. Pain 2013; 154:1732-1737. [DOI: 10.1016/j.pain.2013.05.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 05/06/2013] [Accepted: 05/13/2013] [Indexed: 10/26/2022]
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32
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Fabian E, Vogel D, Blatz V, Ramirez T, Kolle S, Eltze T, van Ravenzwaay B, Oesch F, Landsiedel R. Xenobiotic metabolizing enzyme activities in cells used for testing skin sensitization in vitro. Arch Toxicol 2013; 87:1683-96. [DOI: 10.1007/s00204-013-1090-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2013] [Accepted: 06/27/2013] [Indexed: 01/10/2023]
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33
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Auinger M, Vogel D, Vogel A, Spiegel M, Rohwerder M. A novel laboratory set-up for investigating surface and interface reactions during short term annealing cycles at high temperatures. Rev Sci Instrum 2013; 84:085108. [PMID: 24007108 DOI: 10.1063/1.4817310] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
High temperature oxidation is an important research discipline that covers many topics in steel manufacture and modern energy research. To account for the need of adjusting accurate processing conditions, recent developments of the high temperature laboratory setup at the Max-Planck-Institut für Eisenforschung GmbH will be presented. The experimental assembly has been optimized to investigate surface and interface reactions at elevated temperatures in low oxygen activity gases, covering a large field of experimental possibilities. Many efforts have been taken to enable an accurate control and in situ monitoring of process conditions such as gas flow, gas composition, impurity content, and mass change of the sample.
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Affiliation(s)
- M Auinger
- Max-Planck-Institut für Eisenforschung GmbH, Max-Planck-Straße 1, D-40237 Düsseldorf, Germany
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34
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Vogel D, Spiel C, Schmid M, Stöger-Pollach M, Schlögl R, Suchorski Y, Rupprechter G. The Role of Defects in the Local Reaction Kinetics of CO Oxidation on Low-Index Pd Surfaces. J Phys Chem C Nanomater Interfaces 2013; 117:12054-12060. [PMID: 23785524 PMCID: PMC3683887 DOI: 10.1021/jp312510d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 05/17/2013] [Indexed: 05/28/2023]
Abstract
The role of artificially created defects and steps in the local reaction kinetics of CO oxidation on the individual domains of a polycrystalline Pd foil was studied by photoemission electron microscopy (PEEM), mass spectroscopy (MS), and scanning tunneling microscopy (STM). The defects and steps were created by STM-controlled Ar+ sputtering and the novel PEEM-based approach allowed the simultaneous determination of local kinetic phase transitions on differently oriented μm-sized grains of a polycrystalline sample. The independent (single-crystal-like) reaction behavior of the individual Pd(hkl) domains in the 10-5 mbar pressure range changes upon Ar+ sputtering to a correlated reaction behavior, and the reaction fronts propagate unhindered across the grain boundaries. The defect-rich surface shows also a significantly higher CO tolerance as reflected by the shift of both the global (MS-measured) and the local (PEEM-measured) kinetic diagrams toward higher CO pressure.
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Affiliation(s)
- D. Vogel
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
- Fritz-Haber-Institut der Max-Planck-Gesellschaft,
Berlin, Germany
| | - C. Spiel
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - M. Schmid
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - M. Stöger-Pollach
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - R. Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft,
Berlin, Germany
| | - Y. Suchorski
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
| | - G. Rupprechter
- Institute
of Materials Chemistry, Institute of Applied Physics, and University Service Center for Transmission
Electron Microscopy, Vienna University of
Technology, Vienna, Austria
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35
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Vogel D, Budinska Z, Spiel C, Schlögl R, Suchorski Y, Rupprechter G. Silicon Oxide Surface Segregation in CO Oxidation on Pd: An in situ PEEM, MS and XPS Study. Catal Letters 2013; 143:235-240. [PMID: 23482699 PMCID: PMC3584672 DOI: 10.1007/s10562-012-0955-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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: 10/30/2012] [Accepted: 12/12/2012] [Indexed: 11/30/2022]
Abstract
ABSTRACT The effect of silicon oxide surface segregation on the locally-resolved kinetics of the CO oxidation reaction on individual grains of a polycrystalline Pd foil was studied in situ by PEEM, MS and XPS. The silicon oxide formation induced by Si-impurity segregation at oxidizing conditions, was monitored by XPS and its impact on the global and local (spatially resolved) kinetics of the CO oxidation was determined by MS and PEEM. The results reveal a drastic inhibiting effect of silicon oxide on the Pd reactivity towards CO oxidation, manifested both in the collapse of the global CO2 formation rate and in the modified local reactive properties of individual Pd micrograins. The presence of adsorbed oxygen on the Pd surface effectively enhances the silicon segregation to the Pd surface. GRAPHICAL ABSTRACT
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Affiliation(s)
- D. Vogel
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Z. Budinska
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - C. Spiel
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - R. Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - Y. Suchorski
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - G. Rupprechter
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
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36
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Markl A, Yu T, Vogel D, Müller F, Kotchoubey B, Lang S. Brain processing of pain in patients with unresponsive wakefulness syndrome. Brain Behav 2013; 3:95-103. [PMID: 23533065 PMCID: PMC3607151 DOI: 10.1002/brb3.110] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2012] [Revised: 11/07/2012] [Accepted: 11/12/2012] [Indexed: 01/18/2023] Open
Abstract
By definition, patients with unresponsive wakefulness syndrome (UWS) do not experience pain, but it is still not completely understood how far their brain can process noxious stimuli. The few positron emission tomography studies that have examined pain processing did not yield a clear and consistent result. We performed an functional magnetic resonance imaging scan in 30 UWS patients of nontraumatic etiology and 15 age- and sex-matched healthy control participants (HC). In a block design, noxious electrical stimuli were presented at the patients' left index finger, alternating with a resting baseline condition. Sixteen of the UWS patients (53%) showed neural activation in at least one subsystem of the pain-processing network. More specifically, 15 UWS patients (50%) showed responses in the sensory-discriminative pain network, 30% in the affective pain network. The data indicate that some patients completely fulfilling the clinical UWS criteria have the neural substrates of noxious stimulation processing, which resemble that in control individuals. We therefore suppose that at least some of these patients can experience pain.
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Affiliation(s)
- Alexandra Markl
- Schön Klinik Bad Aibling Kolbermoorer Straβe 72, 83043 Bad Aibling, Germany ; Institute of Medical Psychology and Behavioral Neurobiology, Eberhard-Karls-University Tübingen Gartenstraβe 29, 72074 Tübingen, Germany
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37
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Vogel D, Wickramasinghe N. Special issue on critical considerations around eInnovations in health. Health Technol 2013. [DOI: 10.1007/s12553-013-0053-8] [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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Ghosh SK, Salgin B, Pontoni D, Reusch T, Keil P, Vogel D, Rohwerder M, Reichert H, Salditt T. Structure and Volta potential of lipid multilayers: effect of X-ray irradiation. Langmuir 2013; 29:815-824. [PMID: 23231362 DOI: 10.1021/la304139w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The effect of hard X-ray radiation on the structure and electrostatics of solid-supported lipid multilayer membranes is investigated using a scanning Kelvin probe (SKP) integrated with a high-energy synchrotron beamline to enable in situ measurements of the membranes' local Volta potential (V(p)) during X-ray structural characterization. The undulator radiation employed does not induce any detectable structural damage, but the V(p) of both bare and lipid-modified substrates is found to undergo strong radiation-induced shifts, almost immediately after X-ray exposure. Sample regions that are macroscopically distant (~cm) from the irradiated region experience an exponential V(p) growth with a characteristic time constant of several minutes. The V(p) variations occurring upon periodic on/off X-ray beam switching are fully or partially reversible depending on the location and time-scale of the SKP measurement. The general relevance of these findings for synchrotron-based characterization of biomolecular thin films is critically reviewed.
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Affiliation(s)
- S K Ghosh
- Institute for X-ray Physics, University of Göttingen, Göttingen, Germany.
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Yu T, Lang S, Vogel D, Markl A, Müller F, Kotchoubey B. Patients with unresponsive wakefulness syndrome respond to the pain cries of other people. Neurology 2012; 80:345-52. [PMID: 23255830 DOI: 10.1212/wnl.0b013e31827f0846] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Tao Yu
- Institute of Medical Psychology and Behavioral Neurobiology, University of Tuebingen, Germany
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40
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Kofmel N, Ceschi A, Vogel D. [What is your diagnosis? Hydrocarbon pneumonitis with right pneumothorax after petroleum aspiration (fire eater's lung)]. Praxis (Bern 1994) 2012; 101:1413-1415. [PMID: 23117960 DOI: 10.1024/1661-8157/a000933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- N Kofmel
- Klinik für Allgemeine Innere Medizin, Inselspital, Universitätsspital Bern.
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41
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Riedl V, Valet M, Wöller A, Sorg C, Vogel D, Sprenger T, Boecker H, Wohlschläger AM, Tölle TR. Corrigendum to ‘Repeated pain induces adaptations of intrinsic brain activity to reflect past and predict future pain’ [NeuroImage 57/1 (2011) 206–213]. Neuroimage 2012. [DOI: 10.1016/j.neuroimage.2011.11.026] [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: 11/24/2022] Open
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Abstract
We report a case of a 36-year old patient who suffered from a unilateral painless loss of vision. Ophthalmological examination in the context of a highly reactive syphilis serology revealed an acute syphilitic posterior placoide chorioretinitis (ASPPC). Additional clinical findings were a mucosal lesion on the upper lip, consistent with a plaque opaline and an alopecia specifica as manifestation of secondary syphilis. Treatment consisted in 6 x 4 Mio. IE* Penicillin G for 14 days and 50 mg Prednisone for five days to prevent a Jarisch Herxheimer reaction. The diagnostic measures, therapy and follow up of syphilis, focusing on ocular involvement, are described.
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Affiliation(s)
- S Jegerlehner
- Universitätsklinik für Infektiologie, Inselspital Bern
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43
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Abstract
Complicated flexor tendon injuries are classified into lacerations, avulsions, ruptures, and defects. They are often a challenge for hand surgeons and frequently they present unsatisfactory functional results postoperatively. Lacerations and avulsions are usually treated by pull-out sutures and suture anchors. In ruptures, the causality should be sought. Tendon-linking, transposition and tenodesis/arthrodesis are the domain of rheumatoid arthritis. The primary transplantation of tendons is rarely indicated, ideally in non-contaminated flexor tendon defects in zones III-V with an uninjured surrounding soft tissue situation. Postoperative rehabilitation programs are very the same as in normal flexor tendon injuries.
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Affiliation(s)
- O Lotter
- Berufsgenossenschaftliche Unfallklinik, Klinik für Plastische, Hand-, Rekonstruktive und Verbrennungschirurgie an der Eberhard-Karls-Universität Tübingen, Schnarrenbergstraße 95, 72076, Tübingen, Deutschland.
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Vogel D, Spiel C, Suchorski Y, Urich A, Schlögl R, Rupprechter G. Mapping the local reaction kinetics by PEEM: CO oxidation on individual (100)-type grains of Pt foil. Surf Sci 2011; 605:1999-2005. [PMID: 22140277 PMCID: PMC3191274 DOI: 10.1016/j.susc.2011.07.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Accepted: 07/25/2011] [Indexed: 05/07/2023]
Abstract
The locally-resolved reaction kinetics of CO oxidation on individual (100)-type grains of a polycrystalline Pt foil was monitored in situ using photoemission electron microscopy (PEEM). Reaction-induced surface morphology changes were studied by optical differential interference contrast microscopy and atomic force microscopy (AFM). Regions of high catalytic activity, low activity and bistability in a (p,T)-parameter space were determined, allowing to establish a local kinetic phase diagram for CO oxidation on (100) facets of Pt foil. PEEM observations of the reaction front propagation on Pt(100) domains reveal a high degree of propagation anisotropy both for oxygen and CO fronts on the apparently isotropic Pt(100) surface. The anisotropy vanishes for oxygen fronts at temperatures above 465 K, but is maintained for CO fronts at all temperatures studied, i.e. in the range of 417 to 513 K. A change in the front propagation mechanism is proposed to explain the observed effects.
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Affiliation(s)
- D. Vogel
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - C. Spiel
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - Y. Suchorski
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - A. Urich
- Photonics Institute, Vienna University of Technology, Gußhausstr. 27-29, 1040 Vienna, Austria
| | - R. Schlögl
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
| | - G. Rupprechter
- Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
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45
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46
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Vogel D, Lotter O, Stahl S, Pfau M, Schaller HE. [Operative technique for the rupture of the deep flexor tendon close to the insertion]. Unfallchirurg 2011; 114:528-31. [PMID: 21660510 DOI: 10.1007/s00113-011-2038-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- D Vogel
- Berufsgenossenschaftliche Unfallklinik, Klinik für Plastische, Hand-, Rekonstruktive und Verbrennungschirurgie, Eberhard-Karls-Universität Tübingen, Schnarrenbergstraße 95, 72076, Tübingen, Deutschland.
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47
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Riedl V, Valet M, Wöller A, Sorg C, Vogel D, Sprenger T, Boecker H, Wohlschläger AM, Tölle TR. Repeated pain induces adaptations of intrinsic brain activity to reflect past and predict future pain. Neuroimage 2011; 57:206-213. [PMID: 21514392 DOI: 10.1016/j.neuroimage.2011.04.011] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 03/23/2011] [Accepted: 04/05/2011] [Indexed: 10/18/2022] Open
Abstract
Recent neuroimaging studies have revealed a persistent architecture of intrinsic connectivity networks (ICNs) in the signal of functional magnetic resonance imaging (fMRI) of humans and other species. ICNs are characterized by coherent ongoing activity between distributed brain regions during rest, in the absence of externally oriented behavior. While these networks strongly reflect anatomical connections, the relevance of ICN activity for human behavior remains unclear. Here, we investigated whether intrinsic brain activity adapts to repeated pain and encodes an individual's experience. Healthy subjects received a short episode of heat pain on 11 consecutive days. Across this period, subjects either habituated or sensitized to the painful stimulation. This adaptation was reflected in plasticity of a sensorimotor ICN (SMN) comprising pain related brain regions: coherent intrinsic activity of the somatosensory cortex retrospectively mirrored pain perception; on day 11, intrinsic activity of the prefrontal cortex was additionally synchronized with the SMN and predicted whether an individual would experience more or less pain during upcoming stimulation. Other ICNs of the intrinsic architecture remained unchanged. Due to the ubiquitous occurrence of ICNs in several species, we suggest intrinsic brain activity as an integrative mechanism reflecting accumulated experiences.
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Affiliation(s)
- Valentin Riedl
- Department of Neurology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany; Department of Neuroradiology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany.
| | - Michael Valet
- Department of Neurology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany
| | - Andreas Wöller
- Department of Psychiatry, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany
| | - Christian Sorg
- Department of Psychiatry, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany
| | - Dominik Vogel
- Department of Neurology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany
| | - Till Sprenger
- Department of Neurology and Division of Neuroradiology, University Hospital Basel, Petersgraben 4, 4031 Basel, Switzerland
| | - Henning Boecker
- Functional Neuroimaging Group, Department of Radiology, Rheinische Friedrich-Wilhelms-Universitaet Bonn, Sigmund-Freud-Strasse 25, 53127 Bonn, Germany
| | - Afra M Wohlschläger
- Department of Neuroradiology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany
| | - Thomas R Tölle
- Department of Neurology, Klinikum rechts der Isar, Technische Universitaet Muenchen, Ismaningerstrasse 22, 81675 Munich, Germany
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Markl A, Müller F, Vogel D, Yu T, Lang S, Kotchoubey B. Vegetativer Zustand oder Locked in-Syndrom? Funktionelle Kernspintomografie bei einer Patientin mit unklarer Bewusstseinsstörung. KLIN NEUROPHYSIOL 2011. [DOI: 10.1055/s-0031-1272787] [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: 10/18/2022]
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49
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Spiel C, Vogel D, Suchorski Y, Drachsel W, Schlögl R, Rupprechter G. Catalytic CO Oxidation on Individual (110) Domains of a Polycrystalline Pt Foil: Local Reaction Kinetics by PEEM. Catal Letters 2011. [DOI: 10.1007/s10562-011-0562-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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50
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Vogel D, Walsh E, Chen J, Comerota A. Mode of Thrombolytic Therapy and Residual Obstruction do not Affect Valve Function. J Vasc Surg 2011. [DOI: 10.1016/j.jvs.2010.11.030] [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: 10/18/2022]
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