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Sander M, Magar SD, Etter M, Balducci A, Borchardt L. The "In situ electrolyte" as a sustainable alternative for the realization of high-power devices. ChemSusChem 2024; 17:e202301746. [PMID: 38214055 DOI: 10.1002/cssc.202301746] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 01/11/2024] [Accepted: 01/11/2024] [Indexed: 01/13/2024]
Abstract
The "in situ electrolyte" displays a concept for electric double-layer- as well as metal-ion capacitors in which the by-products formed during carbon synthesis serve directly as electrolyte salt to minimize waste. In this work, the concept is applied for lithium- and sodium-based systems realizing EDLCs containing aqueous, "Water in Salt" (up to 1.8 V) as well as organic (2.4 V) electrolytes. Via the mechanochemical synthesis, carbon materials with surface areas up to 2000 m2 g-1 and an optimal amount of remaining by-product are designed from the renewable resource lignin. Different cation-anion combinations are enabled by further modification directly inside the pores creating imide-based salts which are tracked by synchrotron in situ XRD. By the addition of solvents, the EDLCs show good capacitances up to 21 F g-1 combined with excellent rate performances and stabilities. Moreover, the LiTFSI loaded carbon as positive electrode introduces a new tunable lithium alternative for the pre-lithiation of Li-ion capacitors displaying a good rate performance and cyclability.
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Affiliation(s)
- Miriam Sander
- Inorganic Chemistry I, Ruhr-University Bochum, Universitätstraße 150, 44801, Bochum, Germany
| | - Sandesh Darlami Magar
- Institute for Technical Chemistry and Environmental Chemistry and Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University, Philosophenweg 7a, 07743, Jena, Germany
| | - Martin Etter
- Deutsches Elektronen-Synchrotron (DESY), Notkestraße 85, 22607, Hamburg, Germany
| | - Andrea Balducci
- Institute for Technical Chemistry and Environmental Chemistry and Center for Energy and Environmental Chemistry Jena (CEEC Jena), Friedrich Schiller University, Philosophenweg 7a, 07743, Jena, Germany
| | - Lars Borchardt
- Inorganic Chemistry I, Ruhr-University Bochum, Universitätstraße 150, 44801, Bochum, Germany
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2
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Fechner M, Först M, Orenstein G, Krapivin V, Disa AS, Buzzi M, von Hoegen A, de la Pena G, Nguyen QL, Mankowsky R, Sander M, Lemke H, Deng Y, Trigo M, Cavalleri A. Quenched lattice fluctuations in optically driven SrTiO 3. Nat Mater 2024; 23:363-368. [PMID: 38302742 PMCID: PMC10917662 DOI: 10.1038/s41563-023-01791-y] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 12/14/2023] [Indexed: 02/03/2024]
Abstract
Crystal lattice fluctuations, which are known to influence phase transitions of quantum materials in equilibrium, are also expected to determine the dynamics of light-induced phase changes. However, they have only rarely been explored in these dynamical settings. Here we study the time evolution of lattice fluctuations in the quantum paraelectric SrTiO3, in which mid-infrared drives have been shown to induce a metastable ferroelectric state. Crucial in these physics is the competition between polar instabilities and antiferrodistortive rotations, which in equilibrium frustrate the formation of long-range ferroelectricity. We make use of high-intensity mid-infrared optical pulses to resonantly drive the Ti-O-stretching mode at 17 THz, and we measure the resulting change in lattice fluctuations using time-resolved X-ray diffuse scattering at a free-electron laser. After a prompt increase, we observe a long-lived quench in R-point antiferrodistortive lattice fluctuations. Their enhancement and reduction are theoretically explained by considering the fourth-order nonlinear phononic interactions to the driven optical phonon and third-order coupling to lattice strain, respectively. These observations provide a number of testable hypotheses for the physics of light-induced ferroelectricity.
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Affiliation(s)
- M Fechner
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.
| | - M Först
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.
| | - G Orenstein
- Stanford Pulse Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - V Krapivin
- Stanford Pulse Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - A S Disa
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
- School of Applied & Engineering Physics, Cornell University, Ithaca, NY, USA
| | - M Buzzi
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
| | - A von Hoegen
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany
| | - G de la Pena
- Stanford Pulse Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - Q L Nguyen
- Stanford Pulse Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - R Mankowsky
- Paul Scherrer Institut, Villigen, Switzerland
| | - M Sander
- Paul Scherrer Institut, Villigen, Switzerland
| | - H Lemke
- Paul Scherrer Institut, Villigen, Switzerland
| | - Y Deng
- Paul Scherrer Institut, Villigen, Switzerland
| | - M Trigo
- Stanford Pulse Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, USA
| | - A Cavalleri
- Max Planck Institute for the Structure and Dynamics of Matter, Hamburg, Germany.
- Department of Physics, Clarendon Laboratory, University of Oxford, Oxford, UK.
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3
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Hennicke NS, Kluess D, Sander M. Influence of stem design parameters on periprosthetic femoral fractures examined by subject specific finite element analyses. Med Eng Phys 2023; 119:104032. [PMID: 37634909 DOI: 10.1016/j.medengphy.2023.104032] [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: 08/11/2022] [Revised: 07/12/2023] [Accepted: 07/24/2023] [Indexed: 08/29/2023]
Abstract
Due to the increasing number of periprosthetic femoral fractures (PFF), the optimisation of implant design gains importance. For the presented research a validated, subject specific finite element model of a human femur with an inlying total hip stem was used to compare the influence of different geometrical implant parameters on the development of PFF. The heterogeneous bone tissue was modelled on the basis of computed tomography scans. A ductile damage model with element deletion was applied to simulate bone fracture in a load case re-enacting a stumbling scenario. The results were compared in terms of fracture load, subsidence and fracture pattern to analyse the influence of friction at the implant-bone interface, implant size and stem length. The results showed that higher friction coefficients lead to an increase of fracture load. Also, the usage of an oversized implant has a negligible effect while an undersized implant reduces the fracture load by 48.9% for the investigated femur. Lastly, a higher fracture load was reached with an elongated stem, but the bending and change in fracture path indicate a more distal force transmission and subsequent stress shielding in the proximal femur.
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Affiliation(s)
- N S Hennicke
- Institute of Structural Mechanics, University of Rostock, Albert-Einstein-Str. 2, Rostock 18059, Germany.
| | - D Kluess
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, Rostock University Medical Center, Rostock, Germany
| | - M Sander
- Institute of Structural Mechanics, University of Rostock, Albert-Einstein-Str. 2, Rostock 18059, Germany
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4
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Trauzeddel RF, Leitner M, Dehé L, Nordine M, Piper SK, Habicher M, Sander M, Perka C, Treskatsch S. Goal-directed fluid therapy using uncalibrated pulse contour analysis and balanced crystalloid solutions during hip revision arthroplasty: a quality implementation project. J Orthop Surg Res 2023; 18:281. [PMID: 37024966 PMCID: PMC10078091 DOI: 10.1186/s13018-023-03738-0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 03/21/2023] [Indexed: 04/08/2023] Open
Abstract
BACKGROUND To implement a goal-directed fluid therapy (GDFT) protocol using crystalloids in hip revision arthroplasty surgery within a quality management project at a tertiary hospital using a monocentric, prospective observational study. METHODS Adult patients scheduled for elective hip revision arthroplasty surgery were screened for inclusion in this prospective study. Intraoperatively stroke volume (SV) was optimized within a previously published protocol using uncalibrated pulse contour analysis and balanced crystalloids. Quality of perioperative GDFT was assessed by protocol adherence, SV increase as well as the rate of perioperative complications. Findings were then compared to two different historical groups of a former trial: one receiving GDFT with colloids (prospective colloid group) and one standard fluid therapy (retrospective control group) throughout surgery. Statistical analysis constitutes exploratory data analyses and results are expressed as median with 25th and 75th percentiles, absolute and relative frequencies, and complication rates are further given with 95% confidence intervals for proportions using the normal approximation without continuity correction. RESULTS Sixty-six patients underwent GDFT using balanced crystalloids and were compared to 130 patients with GDFT using balanced colloids and 130 controls without GDFT fluid resuscitation. There was a comparable increase in SV (crystalloids: 65 (54-74 ml; colloids: 67.5 (60-75.25 ml) and total volume infused (crystalloids: 2575 (2000-4210) ml; colloids: 2435 (1760-3480) ml; and controls: 2210 (1658-3000) ml). Overall perioperative complications rates were similar (42.4% (95%CI 30.3-55.2%) for crystalloids and 49.2% (95%CI 40.4-58.1%) for colloids and lower compared to controls: 66.9% (95%CI 58.1-74.9)). Interestingly, a reduced number of hemorrhagic complications was observed within crystalloids: 30% (95%CI 19.6-42.9); colloids: 43% (95%CI 34.4-52.0); and controls: 62% (95%CI 52.6-69.9). There were no differences in the rate of admission to the post-anesthesia care unit or intensive care unit as well as the length of stay. CONCLUSIONS Perioperative fluid management using a GDFT protocol with crystalloids in hip revision arthroplasty surgery was successfully implemented in daily clinical routine. Perioperative complications rates were reduced compared to a previous management without GDFT and comparable when using colloids. TRIAL REGISTRATION ClinicalTrials.gov identifier: NCT01753050.
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Affiliation(s)
- R F Trauzeddel
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität and Humboldt Universität zu Berlin, Charité Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - M Leitner
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität and Humboldt Universität zu Berlin, Charité Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - L Dehé
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität and Humboldt Universität zu Berlin, Charité Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - M Nordine
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität and Humboldt Universität zu Berlin, Charité Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany
| | - S K Piper
- Institute of Medical Informatics, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Charitéplatz 1, 10117, Berlin, Germany
- Institute of Biometry and Clinical Epidemiology, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - M Habicher
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, Justus Liebig University of Giessen, Rudolf-Buchheim-Straße 7, 35392, Gießen, Germany
| | - M Sander
- Department of Anesthesiology, Operative Intensive Care Medicine and Pain Therapy, Justus Liebig University of Giessen, Rudolf-Buchheim-Straße 7, 35392, Gießen, Germany
| | - C Perka
- Center for Musculoskeletal Surgery, Charité -Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Campus Charité Mitte and Virchow-Klinikum, Charitéplatz 1, 10117, Berlin, Germany
| | - S Treskatsch
- Department of Anesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität and Humboldt Universität zu Berlin, Charité Campus Benjamin Franklin, Hindenburgdamm 30, 12203, Berlin, Germany.
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Sander M, Fabig S, Borchardt L. The Transformation of Inorganic to Organic Carbonates: Chasing for Reaction Pathways in Mechanochemistry. Chemistry 2023; 29:e202202860. [PMID: 36314665 PMCID: PMC10107195 DOI: 10.1002/chem.202202860] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/05/2022]
Abstract
Mechanochemical reactions are solvent-free alternatives to solution-based syntheses enabling even conventionally impossible transformations. Their reaction pathways, however, usually remain unexplored within the heavily vibrating, dense milling vessels. Here, we showcase how the green organic solvent diethyl carbonate is synthesized mechanochemically from inorganic alkali carbonates and how the complementary combination of milling parameter studies, synchrotron X-ray diffraction real time monitoring, and quantum chemical calculations reveal the underlying reaction pathways. With this, reaction intermediates are identified, and chemical concepts of solution-chemistry are challenged or corroborated for mechanochemistry.
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Affiliation(s)
- Miriam Sander
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Sven Fabig
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
| | - Lars Borchardt
- Inorganic Chemistry I, Ruhr-Universität Bochum, Universitätsstraße 150, 44801, Bochum, Germany
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6
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Rensch T, Chantrain V, Sander M, Grätz S, Borchardt L. Scale-Up of Solvent-Free, Mechanochemical Precursor Synthesis for Nanoporous Carbon Materials via Extrusion. ChemSusChem 2022; 15:e202200651. [PMID: 35670243 PMCID: PMC9543152 DOI: 10.1002/cssc.202200651] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/16/2022] [Indexed: 06/15/2023]
Abstract
The mechanochemical synthesis of nitrogen-rich nanoporous carbon materials has been scaled up using an extruder. Lignin, urea, and K2 CO3 were extruded under heat and pressure to yield nanoporous carbons with up to 3500 m2 g-1 specific surface area after pyrolysis. The route was further broadened by applying different nitrogen sources as well as sawdust as a low-cost renewable feedstock to receive carbons with a C/N ratio of up to 15 depending on nitrogen source and extrusion parameters. The texture of obtained carbons was investigated by scanning electron microscopy as well as argon and nitrogen physisorption, while the chemical structure was analyzed by X-ray photoelectron spectroscopy. The received carbon was tested as a supercapacitor electrode, showing comparable performance to similar ball-mill-synthesized materials. Lastly, the space-time yield was applied to justify the use of a continuous reactor versus the ball mill.
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Affiliation(s)
- Tilo Rensch
- Department of Inorganic ChemistryRuhr-Universität BochumUniversitätsstrasse 15044801BochumGermany
| | - Viviene Chantrain
- Department of Inorganic ChemistryRuhr-Universität BochumUniversitätsstrasse 15044801BochumGermany
| | - Miriam Sander
- Department of Inorganic ChemistryRuhr-Universität BochumUniversitätsstrasse 15044801BochumGermany
| | - Sven Grätz
- Department of Inorganic ChemistryRuhr-Universität BochumUniversitätsstrasse 15044801BochumGermany
| | - Lars Borchardt
- Department of Inorganic ChemistryRuhr-Universität BochumUniversitätsstrasse 15044801BochumGermany
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7
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Bieber A, Dammermann A, Dichter MN, Dinand C, Eich-Krohm A, Freytag S, Möhler R, Sander M, Thalhammer R, Fleischer S. [Erratum to: Making decisions in times of a pandemic : A qualitative study on perspectives of managers of long-term care facilities]. Z Gerontol Geriatr 2022; 55:150. [PMID: 35267081 PMCID: PMC8921005 DOI: 10.1007/s00391-022-02051-5] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- A Bieber
- Institut für Gesundheits- und Pflegewissenschaft, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Magdeburger Straße 8, 06112, Halle (Saale), Deutschland.
| | - A Dammermann
- Institut für Sozialmedizin und Epidemiologie, Sektion für Forschung und Lehre in der Pflege, Universität zu Lübeck, Lübeck, Deutschland
| | - M N Dichter
- Institut für Pflegewissenschaft, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Deutschland
| | - C Dinand
- Fakultät für Gesundheit, Department für Pflegewissenschaft, Universität Witten-Herdecke, Witten-Herdecke, Deutschland
| | - A Eich-Krohm
- Institut für Sozialmedizin und Gesundheitssystemforschung, Medizinische Fakultät, Otto-von-Guericke-Universität, Magdeburg, Deutschland
| | - S Freytag
- Hochschule Fulda, Fulda, Deutschland
| | - R Möhler
- Institut für Versorgungsforschung und Gesundheitsökonomie, Medizinische Fakultät, Universitätsklinikum Düsseldorf, Düsseldorf, Deutschland
| | - M Sander
- Institut für Pflegewissenschaft, Medizinische Fakultät und Uniklinik Köln, Universität zu Köln, Köln, Deutschland
| | - R Thalhammer
- Fakultät für Angewandte Gesundheits- und Sozialwissenschaften, Technische Hochschule Rosenheim, Rosenheim, Deutschland
| | - S Fleischer
- Institut für Gesundheits- und Pflegewissenschaft, Medizinische Fakultät, Martin-Luther-Universität Halle-Wittenberg, Magdeburger Straße 8, 06112, Halle (Saale), Deutschland
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8
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Hennicke NS, Saemann M, Kluess D, Bader R, Sander M. Subject specific finite element modelling of periprosthetic femoral fractures in different load cases. J Mech Behav Biomed Mater 2021; 126:105059. [PMID: 34995835 DOI: 10.1016/j.jmbbm.2021.105059] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 09/10/2021] [Revised: 12/13/2021] [Accepted: 12/19/2021] [Indexed: 11/19/2022]
Abstract
Periprosthetic femoral fractures (PFF) around total hip replacements are one of the biggest challenges for orthopaedic surgeons. To understand the risk factors and formation of these fractures, the development of a reliable finite element (FE) model incorporating bone failure is essential. Due to the anisotropic and complex hierarchical structure of bone, the mechanical behaviour under large strains is difficult to predict. In this study, a state-of-the-art subject specific FE modelling technique for bone is utilised to generate and investigate PFF. A bilinear constitutive law is applied to bone tissue in subject specific FE models of five human femurs which are virtually implanted with a straight hip stem to numerically analyse PFF. The material parameters of the models are expressed as a function of bone ash density and mapped node wise to the FE mesh. In this way the subject specific, heterogeneous structure of bone is mimicked. For material mapping of the parameters, computed tomography (CT) images of the original fresh-frozen femurs are used. Periprosthetic fractures are generated by deleting elements on the basis of a critical plastic strain failure criterion. The models are analysed under physiological and clinically relevant conditions in two different load cases re-enacting stumbling and a sideways fall on the hip. The results of the analyses are quantified with experimental data from previous work. With regard to fracture pattern, stiffness and failure load the simulations of the load case stumbling delivered the most stable and accurate results. In general, mapping of material properties was found to be an appropriate way to reproduce PFF with finite element models.
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Affiliation(s)
- N S Hennicke
- Institute of Structural Mechanics, University of Rostock, Albert-Einstein-Str. 2, 18059, Rostock, Germany.
| | - M Saemann
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, Rostock University Medical Center, Rostock, Germany
| | - D Kluess
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, Rostock University Medical Center, Rostock, Germany
| | - R Bader
- Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, Rostock University Medical Center, Rostock, Germany
| | - M Sander
- Institute of Structural Mechanics, University of Rostock, Albert-Einstein-Str. 2, 18059, Rostock, Germany
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9
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Augustin J, Sander M, Koller D. [Relevance of health geographic research for dermatology]. Hautarzt 2021; 73:5-14. [PMID: 34846552 DOI: 10.1007/s00105-021-04912-3] [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] [Accepted: 10/20/2021] [Indexed: 11/30/2022]
Abstract
The association between geographic and medical aspects is a well-known phenomenon, which also occurs in dermatological research. This article reviews the field of health geography, the history of the association between spatial location and health, and focuses on current areas of research. Research focusing on explaining regional variations in health refer to individual aspects and needs, population factors, environmental factors, and health care delivery structures in specific regions, as well as the interaction between them. Regional healthcare research is primarily concerned with access to health services and on the utilisation of those services. Methodologically, the analysis of geodata and the application of geographic information systems (GIS) and spatial modelling play a major role in this field. Dermatological research and dermatological practice can benefit from the findings of the regional analysis of access, utilisation, and variations in order to obtain a more detailed picture of care and thus to optimise care.
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Affiliation(s)
- J Augustin
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), CVderm
- CPW 3, Martinistr. 52, 20246, Hamburg, Deutschland.
| | - M Sander
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), CVderm
- CPW 3, Martinistr. 52, 20246, Hamburg, Deutschland
| | - D Koller
- Institut für medizinische Informationsverarbeitung, Biometrie und Epidemiologie (IBE), Ludwig-Maximilians-Universität München (LMU), Marchioninistr. 15, 81377, München, Deutschland
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10
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Augustin J, Sander M, Bei der Kellen R, Augustin M. [Analysis of the skin cancer incidence in Hamburg]. Hautarzt 2021; 73:21-26. [PMID: 34842936 DOI: 10.1007/s00105-021-04915-0] [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] [Accepted: 10/20/2021] [Indexed: 11/29/2022]
Abstract
BACKGROUND The aim of health geographical research is to identify regional variations in health and care and their causes. Regional differences are also evident in skin cancer incidence, but knowledge about small-scale, inner-city variations is not yet available. OBJECTIVES How can the inner-city variations in skin cancer incidence in Hamburg, Germany, be described and how can initial indications of their causes be identified? METHODS The study area is the city of Hamburg and the data source is the Hamburg City Health Study with N = 10,000 persons aged 45-74 years. Descriptive methods are used to characterise the regional variation in skin cancer prevalence adjusted for age and sex. A correlation analysis provides information on possible associations with sociodemographic conditions in the city districts and district clusters. RESULTS Skin cancer prevalence varies within the urban area with high prevalences (maximum 13.8%) in the north-east and south-west of Hamburg. Weak to medium correlations with selected sociodemographic variables are found. For example, the higher the living space per inhabitant (r = 0.35), the higher the skin cancer prevalence in the district. CONCLUSIONS The Hamburg City Health Study shows regional and inner-city disparities and possible associations between skin cancer prevalence and local sociodemographic conditions. However, further and methodologically more extensive studies are necessary in order to make detailed statements.
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Affiliation(s)
- J Augustin
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), CVderm
- CPW 3, Martinistr. 52, 20246, Hamburg, Deutschland.
| | - M Sander
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), CVderm
- CPW 3, Martinistr. 52, 20246, Hamburg, Deutschland
| | - R Bei der Kellen
- Studienzentrum Hamburg City Health Study, Universitätsklinikum Hamburg-Eppendorf (UKE), Hamburg, Deutschland
| | - M Augustin
- Institut für Versorgungsforschung in der Dermatologie und bei Pflegeberufen (IVDP), Universitätsklinikum Hamburg-Eppendorf (UKE), CVderm
- CPW 3, Martinistr. 52, 20246, Hamburg, Deutschland
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11
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Polley C, Radlof W, Hauschulz F, Benz C, Sander M, Seitz H. Morphological and mechanical characterisation of three-dimensional gyroid structures fabricated by electron beam melting for the use as a porous biomaterial. J Mech Behav Biomed Mater 2021; 125:104882. [PMID: 34740017 DOI: 10.1016/j.jmbbm.2021.104882] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 08/08/2021] [Revised: 09/23/2021] [Accepted: 10/02/2021] [Indexed: 02/05/2023]
Abstract
Additive manufactured porous biomaterials based on triply periodic minimal surfaces (TPMS) are a highly discussed topic in the literature. With their unique properties in terms of open porosity, large surface area and surface curvature, they are considered to have bone mimicking properties and remarkable osteogenic potential. In this study, scaffolds of gyroid unit cells of different sizes consisting of a Ti6Al4V alloy were manufactured additively by electron beam melting (EBM). The scaffolds were analysed by micro-computed tomography (micro-CT) to determine their morphological characteristics and, subsequently, subjected to mechanical tests to investigate their quasi-static compressive properties and fatigue resistance. All scaffolds showed an average open porosity of 71-81%, with an average pore size of 0.64-1.41 mm, depending on the investigated design. The design with the smallest unit cell shows the highest quasi-elastic gradient (QEG) as well as the highest compressive offset stress and compression strength. Furthermore, the fatigue resistance of all unit cell size (UCS) variations showed promising results. In detail, the smallest unit cells achieved fatigue strength at 106 cycles at 45% of their compressive offset stress, which is comparatively good for additively manufactured porous biomaterials. In summary, it is demonstrated that the mechanical properties can be significantly modified by varying the unit cell size, thus enabling the scaffolds to be specifically tailored to avoid stress shielding and ensure implant safety. Together with the morphological properties of the gyroid unit cells, the fabricated scaffolds represent a promising approach for use as a bone substitute material.
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Affiliation(s)
- C Polley
- Chair of Microfluidics, University of Rostock, Rostock, Germany.
| | - W Radlof
- Institute of Structural Mechanics, University of Rostock, Rostock, Germany
| | - F Hauschulz
- Chair of Microfluidics, University of Rostock, Rostock, Germany
| | - C Benz
- Institute of Structural Mechanics, University of Rostock, Rostock, Germany
| | - M Sander
- Institute of Structural Mechanics, University of Rostock, Rostock, Germany
| | - H Seitz
- Chair of Microfluidics, University of Rostock, Rostock, Germany; Department Life, Light & Matter, University of Rostock, Rostock, Germany
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12
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Schmidt D, Bauer R, Chung S, Novikov D, Sander M, Pudell JE, Herzog M, Pfuetzenreuter D, Schwarzkopf J, Chernikov R, Gaal P. A new concept for temporal gating of synchrotron X-ray pulses. J Synchrotron Radiat 2021; 28:375-382. [PMID: 33650548 PMCID: PMC7941288 DOI: 10.1107/s1600577521000151] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 01/05/2021] [Indexed: 06/12/2023]
Abstract
A new concept for temporal gating of synchrotron X-ray pulses based on laser-induced thermal transient gratings is presented. First experimental tests of the concept yield a diffraction efficiency of 0.18%; however, the calculations indicate a theoretical efficiency and contrast of >30% and 10-5, respectively. The full efficiency of the pulse picker has not been reached yet due to a long-range thermal deformation of the sample after absorption of the excitation laser. This method can be implemented in a broad spectral range (100 eV to 20 keV) and is only minimally invasive to an existing setup.
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Affiliation(s)
- D. Schmidt
- Institut für Nanostruktur- und Festkörperphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - R. Bauer
- Institut für Nanostruktur- und Festkörperphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - S. Chung
- Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany
| | - D. Novikov
- Deutsches Elektronen-Synchrotron (DESY), 22607 Hamburg, Germany
| | - M. Sander
- Paul-Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - J.-E. Pudell
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - M. Herzog
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - D. Pfuetzenreuter
- Leibniz-Institut für Kristallzüchtung, Max-Born-Strasse 2, 12489 Berlin, Germany
| | - J. Schwarzkopf
- Leibniz-Institut für Kristallzüchtung, Max-Born-Strasse 2, 12489 Berlin, Germany
| | - R. Chernikov
- Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Canada SK S7N 2V3
| | - P. Gaal
- Institut für Nanostruktur- und Festkörperphysik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- Leibniz-Institut für Kristallzüchtung, Max-Born-Strasse 2, 12489 Berlin, Germany
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13
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Gan C, Meyers D, Stukalin I, Dudani S, Dolter S, Grosjean H, Ewanchuk B, Goutam S, Sander M, Wells J, Pabani A, Cheng T, Yuasa T, Morris D, Kanesvaran R, Pal S, Wood L, Donskov F, Choueiri T, Heng D. 425P The impact of obesity on treatment outcomes in patients with solid tumour malignancies treated with first-line (1L) immuno-oncology (IO) agents. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.417] [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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14
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Wiessner R, Lorenz R, Gehring A, Kleber T, Benz C, Sander M, Richter DU, Philipp M. Alterations in the mechanical, chemical and biocompatibility properties of low-cost polyethylene and polyester meshes after steam sterilization. Hernia 2020; 24:1345-1359. [PMID: 32975699 PMCID: PMC7701087 DOI: 10.1007/s10029-020-02272-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 05/14/2020] [Accepted: 07/17/2020] [Indexed: 11/29/2022]
Abstract
Introduction In Africa and other Low Resource Settings (LRS), the guideline-based and thus in most cases mesh-based treatment of inguinal hernias is only feasible to a very limited extent. This has led to an increased use of low cost meshes (LCMs, mostly mosquito meshes) for patients in LRS. Most of the LCMs used are made of polyethylene or polyester, which must be sterilized before use. The aim of our investigations was to determine changes in the biocompatibility of fibroblasts as well as mechanical and chemical properties of LCMs after steam sterilization. Material and methods Two large-pored LCMs made of polyester and polyethylene in a size of 11 x 6 cm were cut and steam sterilized at 100, 121 and 134 °C. These probes and non-sterile meshes were then subjected to mechanical tensile tests in vertical and horizontal tension, chemical analyses and biocompatibility tests with human fibroblasts. All meshes were examined by stereomicroscopy, scanning electron microscopy (SEM), LDH (cytotoxicity) measurement, viability testing, pH, lactate and glycolysis determination. Results Even macroscopically, polyethylene LCMs showed massive shrinkage after steam sterilization, especially at 121 and 134 °C. While polyester meshes showed no significant changes after sterilization with regard to deformation and damage as well as tensile force and stiffness, only the unsterile polyethylene mesh and the mesh sterilized at 100 °C could be tested mechanically due to the shrinkage of the other specimen. For these meshes the tensile forces were about four times higher than for polyester LCMs. Chemical analysis showed that the typical melting point of polyester LCMs was between 254 and 269 °C. Contrary to the specifications, the polyethylene LCM did not consist of low-density polyethylene, but rather high-density polyethylene and therefore had a melting point of 137 °C, so that the marked shrinkage described above occurred. Stereomicroscopy confirmed the shrinkage of polyethylene LCMs already after sterilization at 100 °C in contrast to polyester LCMs. Surprisingly, cytotoxicity (LDH measurement) was lowest for both non-sterile LCMs, while polyethylene LCMs sterilized at 100 and 121 °C in particular showed a significant increase in cytotoxicity 48 hours after incubation with fibroblasts. Glucose metabolism showed no significant changes between sterile and non-sterile polyethylene and polyester LCMs. Conclusion The process of steam sterilization significantly alters mechanical and structural properties of synthetic hernia mesh implants. Our findings do not support a use of low-cost meshes because of their unpredictable properties after steam sterilization.
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Affiliation(s)
- Reiko Wiessner
- Department of General and Visceral Surgery, Bodden-Kliniken Ribnitz-Damgarten, Sandhufe 2, 18311, Ribnitz-Damgarten, Germany.
| | - R Lorenz
- 3+ Chirurgen, Berlin-Spandau, Germany
| | - A Gehring
- Department of General and Visceral Surgery, Bodden-Kliniken Ribnitz-Damgarten, Sandhufe 2, 18311, Ribnitz-Damgarten, Germany
| | - T Kleber
- Department of Vascular Surgery, Helios Klinikum Bad Saarow, Bad Saarow, Germany
| | - C Benz
- Institute of Structural Mechanics (StM), University of Rostock, Albert-Einstein-Str. 2, 18059, Rostock, Germany
| | - M Sander
- Institute of Structural Mechanics (StM), University of Rostock, Albert-Einstein-Str. 2, 18059, Rostock, Germany
| | - D-U Richter
- Department of Obstetrics and Gynecology, University of Rostock, Rostock, Germany
| | - M Philipp
- Department of General, Visceral, Vascular and Transplantation Surgery, University of Rostock, Rostock, Germany
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15
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Gan C, Stukalin I, Meyers D, Dudani S, Grosjean H, Dolter S, Ewanchuk B, Goutam S, Sander M, Wells J, Pabani A, Cheng T, Monzon J, Morris D, Basappa N, Pal S, Wood L, Donskov F, Choueiri T, Heng D. 1046P Outcomes of patients with solid tumour malignancies treated with first-line (1L) immuno-oncology (IO) agents who do not meet eligibility criteria for clinical trials. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.08.1166] [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: 10/23/2022] Open
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16
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Agné A, Richter K, Tumpara S, Sauer AL, Beckert F, Wrenger S, Zakrzewicz A, Hecker A, Markmann M, Koch C, Zajonz T, Sander M, Böning A, Padberg W, Janciauskiene S, Grau V. Does heart surgery change the capacity of α1-antitrypsin to inhibit the ATP-induced release of monocytic interleukin-1β? A preliminary study. Int Immunopharmacol 2020; 81:106297. [PMID: 32062078 DOI: 10.1016/j.intimp.2020.106297] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 01/31/2020] [Accepted: 02/05/2020] [Indexed: 12/20/2022]
Abstract
Heart surgery involving cardiopulmonary bypass induces systemic inflammation that is, at least in part, caused by extracellular ATP originating from damaged cells and by proteases secreted by activated neutrophils. The anti-protease α1-antitrypsin (AAT) forms complexes with several proteases including neutrophil elastase, resulting in a mutual loss of activity. We demonstrated recently that AAT inhibits the ATP-induced release of the pro-inflammatory cytokine interleukin-1β by human monocytes by a mechanism involving activation of metabotropic functions at nicotinic acetylcholine receptors. Interleukin-1β importantly contributes to the pathogenesis of sterile inflammatory response syndrome. Thus, AAT might function as an endogenous safeguard against life-threatening systemic inflammation. In this preliminary study, we test the hypothesis that during cardiopulmonary bypass, AAT is inactivated as an anti- protease and as an inhibitor of ATP-induced interleukin-1β release. AAT was affinity-purified from the blood plasma of patients before, during and after surgery. Lipopolysaccharide-primed human monocytic U937 cells were stimulated with ATP in the presence or absence of patient AAT to test for its inhibitory effect on interleukin-1β release. Anti-protease activity was investigated via complex formation with neutrophil elastase. The capacity of patient AAT to inhibit the ATP-induced release of interleukin-1β might be slightly reduced in response to heart surgery and complex formation of patient AAT with neutrophil elastase was unimpaired. We conclude that surgery involving cardiopulmonary bypass does not markedly reduce the anti-inflammatory and the anti-protease activity of AAT. The question if AAT augmentation therapy during heart surgery is suited to attenuate postoperative inflammation warrants further studies in vivo.
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Affiliation(s)
- A Agné
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University of Giessen, Giessen, Germany.
| | - K Richter
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University of Giessen, Giessen, Germany
| | - S Tumpara
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
| | - A-L Sauer
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Justus-Liebig University of Giessen, Giessen, Germany
| | - F Beckert
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Justus-Liebig University of Giessen, Giessen, Germany
| | - S Wrenger
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany
| | - A Zakrzewicz
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University of Giessen, Giessen, Germany
| | - A Hecker
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University of Giessen, Giessen, Germany
| | - M Markmann
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Justus-Liebig University of Giessen, Giessen, Germany
| | - C Koch
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Justus-Liebig University of Giessen, Giessen, Germany
| | - T Zajonz
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Justus-Liebig University of Giessen, Giessen, Germany
| | - M Sander
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Justus-Liebig University of Giessen, Giessen, Germany
| | - A Böning
- Department of Heart and Vascular Surgery, Justus-Liebig University of Giessen, Giessen, Germany
| | - W Padberg
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University of Giessen, Giessen, Germany
| | - S Janciauskiene
- Department of Respiratory Medicine, Hannover Medical School, Hannover, Germany; Member of the German Centre for Lung Research (DZL), Germany
| | - V Grau
- Laboratory of Experimental Surgery, Department of General and Thoracic Surgery, Justus-Liebig-University of Giessen, Giessen, Germany; Member of the German Centre for Lung Research (DZL), Germany
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17
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Habicher M, Zajonz T, Heringlake M, Böning A, Treskatsch S, Schirmer U, Markewitz A, Sander M. [S3 guidelines on intensive medical care of cardiac surgery patients : Hemodynamic monitoring and cardiovascular system-an update]. Anaesthesist 2019; 67:375-379. [PMID: 29644444 DOI: 10.1007/s00101-018-0433-6] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An update of the S3- guidelines for treatment of cardiac surgery patients in the intensive care unit, hemodynamic monitoring and cardiovascular system was published by the Association of Scientific Medical Societies in Germany (AWMF) in January 2018. This publication updates the guidelines from 2006 and 2011. The guidelines include nine sections that in addition to different methods of hemodynamic monitoring also reviews the topic of volume therapy as well as vasoactive and inotropic drugs. Furthermore, the guidelines also define the goals for cardiovascular treatment. This article describes the most important innovations of these comprehensive guidelines.
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Affiliation(s)
- M Habicher
- Klinik für Anästhesiologie, operative Intensivmedizin und Schmerztherapie, Universitätsklinikum Gießen, Rudolf-Buchheim-Straße 7, 35392, Gießen, Deutschland
- Klinik für Anästhesiologie mit Schwerpunkt operative Intensivmedizin, Charité - Universitätsmedizin Berlin, Charité Campus Mitte und Campus Virchow Klinikum, Berlin, Deutschland
| | - T Zajonz
- Klinik für Anästhesiologie, operative Intensivmedizin und Schmerztherapie, Universitätsklinikum Gießen, Rudolf-Buchheim-Straße 7, 35392, Gießen, Deutschland
| | - M Heringlake
- Klinik für Anästhesiologie und Intensivmedizin, Universitätsklinikum Schleswig-Holstein, Lübeck, Deutschland
| | - A Böning
- Klinik für Herz- und Gefäßchirurgie, Universitätsklinikum Gießen, Gießen, Deutschland
| | - S Treskatsch
- Klinik für Anästhesiologie mit Schwerpunkt operative Intensivmedizin, Charité - Universitätsmedizin Berlin, Charité Campus Mitte und Campus Virchow Klinikum, Berlin, Deutschland
| | - U Schirmer
- Herz- und Diabeteszentrum NRW Institut für Anästhesiologie, Universitätsklinik der Ruhr-Universität Bochum, Bad Oeynhausen, Deutschland
| | - A Markewitz
- Klinik für Herz- und Gefäßchirurgie, Bundeszentralwehrkrankenhaus Koblenz, Koblenz, Deutschland
| | - M Sander
- Klinik für Anästhesiologie, operative Intensivmedizin und Schmerztherapie, Universitätsklinikum Gießen, Rudolf-Buchheim-Straße 7, 35392, Gießen, Deutschland.
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18
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Lehmann F, Rau J, Malcolm B, Sander M, von Heymann C, Moormann T, Geyer T, Balzer F, Wernecke KD, Kaufner L. Why does a point of care guided transfusion algorithm not improve blood loss and transfusion practice in patients undergoing high-risk cardiac surgery? A prospective randomized controlled pilot study. BMC Anesthesiol 2019; 19:24. [PMID: 30777015 PMCID: PMC6379957 DOI: 10.1186/s12871-019-0689-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 11/19/2018] [Accepted: 01/25/2019] [Indexed: 12/15/2022] Open
Abstract
Background Adult cardiac surgery is often complicated by elevated blood losses that account for elevated transfusion requirements. Perioperative bleeding and transfusion of blood products are major risk factors for morbidity and mortality. Timely diagnostic and goal-directed therapies aim at the reduction of bleeding and need for allogeneic transfusions. Methods Single-centre, prospective, randomized trial assessing blood loss and transfusion requirements of 26 adult patients undergoing elective cardiac surgery at high risk for perioperative bleeding. Primary endpoint was blood loss at 24 h postoperatively. Random assignment to intra- and postoperative haemostatic management following either an algorithm based on conventional coagulation assays (conventional group: platelet count, aPTT, PT, fibrinogen) or based on point-of-care (PoC-group) monitoring, i.e. activated rotational thromboelastometry (ROTEM®) combined with multiple aggregometry (Multiplate®). Differences between groups were analysed using nonparametric tests for independent samples. Results The study was terminated after interim analysis (n = 26). Chest tube drainage volume was 360 ml (IQR 229-599 ml) in the conventional group, and 380 ml (IQR 310-590 ml) in the PoC-group (p = 0.767) after 24 h. Basic patient characteristics, results of PoC coagulation assays, and transfusion requirements of red blood cells and fresh frozen plasma did not differ between groups. Coagulation results were comparable. Platelets were transfused in the PoC group only. Conclusion Blood loss via chest tube drainage and transfusion amounts were not different comparing PoC- and central lab-driven transfusion algorithms in subjects that underwent high-risk cardiac surgery. Routine PoC coagulation diagnostics do not seem to be beneficial when actual blood loss is low. High risk procedures might not suffice as a sole risk factor for increased blood loss. Trial registration NCT01402739, Date of registration July 26, 2011.
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Affiliation(s)
- F Lehmann
- Department of Anaesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum and Campus Charité Mitte, Berlin, Germany.
| | - J Rau
- Division of Medical Biotechnology, Paul-Ehrlich-Institut, Federal Institute for Vaccines and Biomedicines, Langen, Hessen, Germany
| | - B Malcolm
- Department of Internal Medicine, Hegau-Bodensee-Klinikum, Singen, Baden-Württemberg, Germany
| | - M Sander
- Department of Anaesthesiology, Intensive Care Medicine and Pain therapy, University Hospital Gießen UKGM, Justus-Liebig-University Giessen, Giessen, Hessen, Germany
| | - C von Heymann
- Department of Anaesthesia, Intensive Care Medicine, Emergency Medicine and Pain Therapy, Vivantes Klinikum im Friedrichshain, Berlin, Germany
| | - T Moormann
- Department of Anaesthesiology and Intensive Care Medicine, Martin-Luther-Krankenhaus, Berlin, Germany
| | - T Geyer
- Department of Anaesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum and Campus Charité Mitte, Berlin, Germany
| | - F Balzer
- Department of Anaesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum and Campus Charité Mitte, Berlin, Germany
| | - K D Wernecke
- CRO SOSTANA GmbH and Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - L Kaufner
- Department of Anaesthesiology and Intensive Care Medicine, Charité - Universitätsmedizin Berlin, Campus Virchow-Klinikum and Campus Charité Mitte, Berlin, Germany
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Kelly RF, Mazeri S, Hartley C, Hamman SM, Ngu Ngwa V, Nkongho EF, Tanya V, Sander M, Ndip L, Morgan KL, Muwonge A, Handel I, de Bronsvoort BMC, Williams DJL. Assessing the performance of a Fasciola gigantica serum antibody ELISA to estimate prevalence in cattle in Cameroon. BMC Vet Res 2019; 15:8. [PMID: 30606185 PMCID: PMC6318879 DOI: 10.1186/s12917-018-1762-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Accepted: 12/21/2018] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Cattle rearing in Cameroon is both economically and culturally important, however parasitic diseases detrimentally impact cattle productivity. In sub-Saharan Africa bovine fasciolosis is generally attributed to F. gigantica, although understanding of Fasciola species present and local epidemiology in individual countries is patchy. Partly limited by the lack of representative surveys and understanding of diagnostic test perfromance in local cattle populations. The aims of this paper were to determine the Fasciola species infecting cattle, develop a species specific serum antibody ELISA, assess the performance of the ELISA and use it to assess the prevalence of F. gigantica exposure in two important cattle-rearing areas of Cameroon. RESULTS A random sample of Fasciola parasites were collected and were all identified as F. gigantica (100%, CI:94.0-100%, n = 60) using RAPD-PCR analysis. A F. gigantica antibody ELISA was developed and initially a diagnostic cut-off was determined using a sample of known positive and negative cattle. The initial cut-off was used as starting point to estimate an optimal cut-off to estimate the best combination of sensitivity and specificity. This was achieved through sampling a naturally infected population with known infection status (cattle slaughtered at Bamenda abattoir, North West Region (n = 1112) and Ngaoundere abattoir, Vina Division, Adamawa Region (n = 776) in Cameroon). These cattle were tested and results analysed using a Bayesian non-gold standard method. The optimal cut-off was 23.5, which gave a sensitivity of 65.3% and a specificity of 65.2%. The prevalence of exposure to F. gigantica was higher in cattle in Ngaoundere (56.4% CI: 50.2-60.0%) than Bamenda (0.6% CI: 0.0-1.4%). CONCLUSION Fasciola gigantica was identified as the predominant Fasciola species in Cameroon. Although the sensitivity and specificity F. gigantica antibody ELISA requires improvement, the test has shown to be a potentially useful tool in epidemiological studies. Highlighting the need for better understanding of the impact of F. gigantica infections on cattle production in Cameroon to improve cattle production in the pastoral systems of Central-West Africa. This paper also highlights that non-gold standard latent class methods are useful for assessing diagnostic test performance in naturally-infected animal populations in resource limited settings.
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Affiliation(s)
- R. F. Kelly
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG UK
- Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG UK
| | - S. Mazeri
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG UK
| | - C. Hartley
- Veterinary Parasitology, Institute of Infection and Global Health, Liverpool Science Park IC2, 146 Brownlow Hill, Liverpool, L3 5RF UK
| | - S. M. Hamman
- Institute of Agricultural Research for Development, Regional Centre of Wakwa, Ngaoundere, Cameroon
| | - V. Ngu Ngwa
- School of Veterinary Medicine and Sciences, B.P. 454, University of Ngaoundere, Ngaoundere, Cameroon
| | - E. F. Nkongho
- Microbiology and Parasitology Unit, Faculty of Allied Medical Science, University of Calabar, Calabar, Nigeria
| | - V. Tanya
- Cameroon Academy of Sciences, P.O. Box 1457, Yaoundé, Cameroon
| | - M. Sander
- Tuberculosis Reference Laboratory Bamenda, Hospital Roundabout, Bamenda, Cameroon
| | - L. Ndip
- Laboratory of Emerging Infectious Diseases, University of Buea, Buea, Cameroon
| | - K. L. Morgan
- Institute of Ageing and Chronic Disease and School of Veterinary Science, University of Liverpool, Leahurst Campus, Neston, Wirral, CH64 7TE UK
| | - A. Muwonge
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG UK
| | - I. Handel
- Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG UK
| | - B. M. C. de Bronsvoort
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG UK
| | - D. J. L. Williams
- Veterinary Parasitology, Institute of Infection and Global Health, Liverpool Science Park IC2, 146 Brownlow Hill, Liverpool, L3 5RF UK
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Mann V, Limberg F, Mann STW, Little S, Müller M, Sander M, Röhrig R. Routineerhalt beim Umgang mit extraglottischen Atemwegen im Rettungsdienst: Effektivität und Nachhaltigkeit einer simulatorbasierten Ausbildung. Med Klin Intensivmed Notfmed 2018; 114:541-551. [DOI: 10.1007/s00063-018-0429-7] [Citation(s) in RCA: 3] [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] [Received: 01/27/2018] [Revised: 02/25/2018] [Accepted: 03/07/2018] [Indexed: 11/28/2022]
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21
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Lundby C, Calbet J, van Hall G, Saltin B, Sander M. Sustained sympathetic activity in altitude acclimatizing lowlanders and high-altitude natives. Scand J Med Sci Sports 2017; 28:854-861. [DOI: 10.1111/sms.12976] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/17/2017] [Indexed: 12/12/2022]
Affiliation(s)
- C. Lundby
- Copenhagen Muscle Research Centre (CMRC); Rigshospitalet; Copenhagen Denmark
- Center for Physical Activity Research; Rigshospitalet; Copenhagen Denmark
| | - J. Calbet
- Copenhagen Muscle Research Centre (CMRC); Rigshospitalet; Copenhagen Denmark
- Department of Physical Education; Research Institute of Biomedical and Health Sciences (IUIBS); University of Las Palmas de Gran Canaria; Las Palmas Spain
| | - G. van Hall
- Copenhagen Muscle Research Centre (CMRC); Rigshospitalet; Copenhagen Denmark
- Endocrinology Research Section; Rigshospitalet; Copenhagen Denmark
| | - B. Saltin
- Copenhagen Muscle Research Centre (CMRC); Rigshospitalet; Copenhagen Denmark
| | - M. Sander
- Copenhagen Muscle Research Centre (CMRC); Rigshospitalet; Copenhagen Denmark
- Kardiologisk Afdeling Y; Bispebjerg Hospital; Copenhagen Denmark
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22
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Sander M, Herzog M, Pudell JE, Bargheer M, Weinkauf N, Pedersen M, Newby G, Sellmann J, Schwarzkopf J, Besse V, Temnov VV, Gaal P. Spatiotemporal Coherent Control of Thermal Excitations in Solids. Phys Rev Lett 2017; 119:075901. [PMID: 28949697 DOI: 10.1103/physrevlett.119.075901] [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: 04/04/2017] [Indexed: 06/07/2023]
Abstract
X-ray reflectivity measurements of femtosecond laser-induced transient gratings (TG) are applied to demonstrate the spatiotemporal coherent control of thermally induced surface deformations on ultrafast time scales. Using grazing incidence x-ray diffraction we unambiguously measure the amplitude of transient surface deformations with sub-Å resolution. Understanding the dynamics of femtosecond TG excitations in terms of superposition of acoustic and thermal gratings makes it possible to develop new ways of coherent control in x-ray diffraction experiments. Being the dominant source of TG signal, the long-living thermal grating with spatial period Λ can be canceled by a second, time-delayed TG excitation shifted by Λ/2. The ultimate speed limits of such an ultrafast x-ray shutter are inferred from the detailed analysis of thermal and acoustic dynamics in TG experiments.
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Affiliation(s)
- M Sander
- Institute for Physics and Astronomy, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
| | - M Herzog
- Institute for Physics and Astronomy, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
| | - J E Pudell
- Institute for Physics and Astronomy, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
| | - M Bargheer
- Institute for Physics and Astronomy, Universität Potsdam, Karl-Liebknecht-Straße 24-25, 14476 Potsdam, Germany
- Helmholtz-Zentrum Berlin for Materials and Energy GmbH, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin Germany
| | - N Weinkauf
- Institute for Solid State and Nanostructure Physics, Universität Hamburg, JungiusStraße 11, 20355 Hamburg, Germany
| | - M Pedersen
- European Synchrotron Radiation Facility ESRF, 71 Avenue des Martyrs 23800 Grenoble, France
| | - G Newby
- European Synchrotron Radiation Facility ESRF, 71 Avenue des Martyrs 23800 Grenoble, France
| | - J Sellmann
- Institute for Crystal Growth, Max-Born-Straße 2, 12489 Berlin, Germany
| | - J Schwarzkopf
- Institute for Crystal Growth, Max-Born-Straße 2, 12489 Berlin, Germany
| | - V Besse
- IMMM CNRS 6283, Université du Maine, 72085 Le Mans cedex, France
| | - V V Temnov
- IMMM CNRS 6283, Université du Maine, 72085 Le Mans cedex, France
- Groupe d'Etude de la Matière Condensée (GEMaC), Université de Versailles-Saint Quentin en Yvelines, CNRS UMR 8635, Université Paris-Sacley, 45 avenue des Etats-Unis, 78035 Versailles Cedex, France
| | - P Gaal
- Helmholtz-Zentrum Berlin for Materials and Energy GmbH, Wilhelm-Conrad-Röntgen Campus, BESSY II, Albert-Einstein-Straße 15, 12489 Berlin Germany
- Institute for Solid State and Nanostructure Physics, Universität Hamburg, JungiusStraße 11, 20355 Hamburg, Germany
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23
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Kim KY, Le QT, Yom SS, Pinsky BA, Bratman SV, Ng RHW, El Mubarak HS, Chan KCA, Sander M, Conley BA. Current State of PCR-Based Epstein-Barr Virus DNA Testing for Nasopharyngeal Cancer. J Natl Cancer Inst 2017; 109:3071262. [PMID: 28376165 DOI: 10.1093/jnci/djx007] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Accepted: 01/09/2017] [Indexed: 12/13/2022] Open
Abstract
Clinical studies have shown plasma Epstein-Barr virus (EBV) DNA level to be an independent prognostic biomarker for nasopharyngeal carcinoma (NPC). However, the proportion of NPC patients whose tumors are associated with EBV vary with geographic location, and there are a variety of assays for plasma EBV. To develop the level of evidence needed to demonstrate the clinical utility of plasma EBV DNA detection for NPC patients and encourage widespread adoption of this biomarker test in clinical laboratories, validated harmonized assays are needed. In 2015, the National Cancer Institute (NCI) convened a Workshop on Harmonization of EBV Testing for Nasopharyngeal Cancer, where experts in head and neck oncology and laboratory medicine addressed the limitations of currently available polymerase chain reaction-based EBV DNA quantitation assays and discussed strategies for advancing the development of harmonized EBV DNA assays and their appropriate clinical use. This article presents the key recommendations to direct future efforts in assay harmonization and validation.
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Affiliation(s)
- Kelly Y Kim
- Cancer Diagnosis Program, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
| | - Quynh-Thu Le
- Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA, USA
| | - Sue S Yom
- Department of Radiation Oncology, University of California, San Francisco, CA, USA
| | - Benjamin A Pinsky
- Departments of Pathology and Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Scott V Bratman
- Department of Radiation Oncology, Princess Margaret Cancer Centre/University of Toronto, Toronto, Ontario, Canada
| | - Raymond H W Ng
- Department of Otolaryngology, Head and Neck Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Haja S El Mubarak
- Division of Microbiology Devices, Center for Devices and Radiological Health, Food and Drug Administration, Silver Spring, MD, USA
| | - K C Allen Chan
- Department of Chemical Pathology, State Key Laboratory in Oncology of South China, The Chinese University of Hong Kong, Hong Kong SAR, China
| | | | - Barbara A Conley
- Cancer Diagnosis Program, National Cancer Institute, National Institutes of Health, Bethesda, Maryland, USA
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24
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Egbe NF, Muwonge A, Ndip L, Kelly RF, Sander M, Tanya V, Ngwa VN, Handel IG, Novak A, Ngandalo R, Mazeri S, Morgan KL, Asuquo A, de C Bronsvoort BM. Molecular epidemiology of Mycobacterium bovis in Cameroon. Sci Rep 2017; 7:4652. [PMID: 28680043 PMCID: PMC5498612 DOI: 10.1038/s41598-017-04230-6] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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: 04/29/2016] [Accepted: 05/11/2017] [Indexed: 11/28/2022] Open
Abstract
We describe the largest molecular epidemiological study of Bovine Tuberculosis (bTB) in a sub-Saharan African country with higher spatial resolution providing new insights into bTB. Four hundred and ninety-nine samples were collected for culture from 201 and 179 cattle with and without bTB-like lesions respectively out of 2,346 cattle slaughtered at Bamenda, Ngaoundere, Garoua and Maroua abattoirs between 2012–2013. Two hundred and fifty-five M. bovis were isolated, identified and genotyped using deletion analysis, Hain® Genotype MTBC, spoligotyping and MIRU-VNTR. African 1 was the dominant M. bovis clonal complex, with 97 unique genotypes including 19 novel spoligotypes representing the highest M. bovis genetic diversity observed in Africa to date. SB0944 and SB0953 dominated (63%) the observed spoligotypes. A third of animals with multiple lesions had multiple strain infections. Higher diversity but little evidence of recent transmission of M. bovis was more common in Adamawa compared to the North-West Region. The Adamawa was characterised by a high frequency of singletons possibly due to constant additions from an active livestock movement network compared to the North-West Region where a local expansion was more evident. The latter combined with population-based inferences suggest an unstable and stable bTB-endemic status in the North-West and Adamawa Regions respectively.
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Affiliation(s)
- N F Egbe
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,Microbiology and Parasitology Unit, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Nigeria
| | - A Muwonge
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.
| | - L Ndip
- Laboratory for Emerging Infectious Diseases, University of Buea, Buea, Cameroon.,Department of Biomedical Sciences, Faculty of Health Sciences, University of Buea, Buea, Cameroon
| | - R F Kelly
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,Farm Animal Clinical Sciences, School of Veterinary Medicine, University of Glasgow, Glasgow, G61 1QH, UK
| | - M Sander
- Tuberculosis Reference Laboratory, Bamenda, P.O. Box 586, Cameroon
| | - V Tanya
- Cameroon Academy of Sciences, P.O. Box 1457, Yaoundé, Cameroon
| | - V Ngu Ngwa
- School of Veterinary Medicine and Sciences, University of Ngaoundere, B.P. 454, Ngaoundere, Cameroon
| | - I G Handel
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - A Novak
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - R Ngandalo
- Laboratoire de Recherches Vétérinaires et Zootechniques de Farcha, N'Djaména, Chad
| | - S Mazeri
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - K L Morgan
- Institute of Ageing and Chronic Disease, University of Liverpool, Leahurst Campus, Neston, Wirral, CH64 7TE, UK
| | - A Asuquo
- Microbiology and Parasitology Unit, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Nigeria
| | - B M de C Bronsvoort
- Division of Genetics and Genomics, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.,Centre for Tropical Livestock Genetics and Health, The Roslin Institute and the Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
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25
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Abstract
Simulation assumes a growing importance in the field of emergency medical education. Many rescue service schools work with simulators or even have their own simulation center. Classic resuscitation training in the classroom is increasingly being replaced by realistic case scenarios. But simulators themselves do not train! Using a simulator in emergency medical training does not necessarily mean achieving sustained learning success among the participants. Depending on the skills, abilities or competences being taught, there seems to be different requirements for simulation. However, there is no scientific evidence about how strong learners should be stressed in order to achieve the best learning effect. However, it can be stated that for training purely technical skills, simulators that represent the anatomical or physiological reality as accurately as possible should be used. If soft skills, practical knowledge and decision-making are the learning objectives, a scenario with extremly realistic conditions needs to be embedded. Mid-fidelity simulators seem to be able to cover the widest range of imparting skills for emergency medical training. No matter what simulator is used, the following applies: The selected scenario must be realistic and the simulation as well as technical capabilities of the simulator must be coordinated. A well-presented scenario with a well-trained teacher using a simple resuscitation doll appears to be better than a highly complex, however unrealistic, amateur simulation scenario for successful learning.
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Affiliation(s)
- A Schaumberg
- Klinik für Anästhesiologie und Operative Intensivmedizin, Universitätsklinikum Gießen und Marburg GmbH Standort Gießen, Rudolf-Buchheim-Str. 7, 35392, Gießen, Deutschland.
| | - T Schröder
- Charité-Universitätsmedizin Berlin Campus Charité Mitte/Campus Virchow-Klinikum, Berlin, Deutschland
| | - M Sander
- Klinik für Anästhesiologie und Operative Intensivmedizin, Universitätsklinikum Gießen und Marburg GmbH Standort Gießen, Rudolf-Buchheim-Str. 7, 35392, Gießen, Deutschland
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26
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Juberg DR, Knudsen TB, Sander M, Beck NB, Faustman EM, Mendrick DL, Fowle JR, Hartung T, Tice RR, Lemazurier E, Becker RA, Fitzpatrick SC, Daston GP, Harrill A, Hines RN, Keller DA, Lipscomb JC, Watson D, Bahadori T, Crofton KM. FutureTox III: Bridges for Translation. Toxicol Sci 2016; 155:22-31. [PMID: 27780885 DOI: 10.1093/toxsci/kfw194] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Future Tox III, a Society of Toxicology Contemporary Concepts in Toxicology workshop, was held in November 2015. Building upon Future Tox I and II, Future Tox III was focused on developing the high throughput risk assessment paradigm and taking the science of in vitro data and in silico models forward to explore the question-what progress is being made to address challenges in implementing the emerging big-data toolbox for risk assessment and regulatory decision-making. This article reports on the outcome of the workshop including 2 examples of where advancements in predictive toxicology approaches are being applied within Federal agencies, where opportunities remain within the exposome and AOP domains, and how collectively the toxicology community across multiple sectors can continue to bridge the translation from historical approaches to Tox21 implementation relative to risk assessment and regulatory decision-making.
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Affiliation(s)
| | - Thomas B Knudsen
- US Environmental Protection Agency, Research Triangle Park, North Carolina
| | | | - Nancy B Beck
- American Chemistry Council, Washington, The District of Columbia
| | | | | | - John R Fowle
- Science to Inform, LLC, Pittsboro, North Carolina
| | - Thomas Hartung
- Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland
| | - Raymond R Tice
- National Toxicology Program/National Institute of Environmental Health Sciences, Durham, North Carolina
| | | | - Richard A Becker
- American Chemistry Council, Washington, The District of Columbia
| | | | | | - Alison Harrill
- University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Ronald N Hines
- US Environmental Protection Agency, Research Triangle Park, North Carolina
| | | | | | | | - Tina Bahadori
- US Environmental Protection Agency, Washington, The District of Columbia
| | - Kevin M Crofton
- US Environmental Protection Agency, Research Triangle Park, North Carolina
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27
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Abstract
Insulin secretion must be tightly coupled to nutritional state to maintain blood glucose homeostasis. To this end, pancreatic β-cells sense and respond to changes in metabolic conditions, thereby anticipating insulin demands for a given physiological context. This is achieved in part through adjustments of nutrient metabolism, which is controlled at several levels including allosteric regulation, post-translational modifications, and altered expression of metabolic enzymes. In this review, we discuss mechanisms of β-cell metabolic and functional adaptation in the context of two physiological states that alter glucose-stimulated insulin secretion: fasting and insulin resistance. We review current knowledge of metabolic changes that occur in the β-cell during adaptation and specifically discuss transcriptional mechanisms that underlie β-cell adaptation. A more comprehensive understanding of how β-cells adapt to changes in nutrient state could identify mechanisms to be co-opted for therapeutically modulating insulin secretion in metabolic disease.
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Affiliation(s)
- M Wortham
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California San Diego, La Jolla
| | - M Sander
- Departments of Pediatrics and Cellular and Molecular Medicine, Pediatric Diabetes Research Center, University of California San Diego, La Jolla.
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28
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Pavlenko ES, Sander M, Mitzscherling S, Pudell J, Zamponi F, Rössle M, Bojahr A, Bargheer M. Azobenzene - functionalized polyelectrolyte nanolayers as ultrafast optoacoustic transducers. Nanoscale 2016; 8:13297-302. [PMID: 27341685 DOI: 10.1039/c6nr01448h] [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] [Indexed: 05/22/2023]
Abstract
We introduce azobenzene-functionalized polyelectrolyte multilayers as efficient, inexpensive optoacoustic transducers for hyper-sound strain waves in the GHz range. By picosecond transient reflectivity measurements we study the creation of nanoscale strain waves, their reflection from interfaces, damping by scattering from nanoparticles and propagation in soft and hard adjacent materials like polymer layers, quartz and mica. The amplitude of the generated strain ε∼ 5 × 10(-4) is calibrated by ultrafast X-ray diffraction.
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Affiliation(s)
- E S Pavlenko
- Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany.
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29
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Egbe NF, Muwonge A, Ndip L, Kelly RF, Sander M, Tanya V, Ngwa VN, Handel IG, Novak A, Ngandalo R, Mazeri S, Morgan KL, Asuquo A, Bronsvoort BMDC. Abattoir-based estimates of mycobacterial infections in Cameroon. Sci Rep 2016; 6:24320. [PMID: 27075056 PMCID: PMC4830956 DOI: 10.1038/srep24320] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [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: 10/20/2015] [Accepted: 03/23/2016] [Indexed: 01/04/2023] Open
Abstract
Mycobacteria cause major diseases including human tuberculosis, bovine tuberculosis and Johne’s disease. In livestock, the dominant species is M. bovis causing bovine tuberculosis (bTB), a disease of global zoonotic importance. In this study, we estimated the prevalence of Mycobacteria in slaughter cattle in Cameroon. A total of 2,346 cattle were examined in a cross-sectional study at four abattoirs in Cameroon. Up to three lesions per animal were collected for further study and a retropharyngeal lymph node was collected from a random sample of non-lesioned animals. Samples were cultured on Lowenstein Jensen media and the BACTEC MGIT 960 system, and identified using the Hain® Genotype kits. A total of 207/2,346 cattle were identified with bTB-like lesions, representing 4.0% (45/1,129), 11.3% (106/935), 23.8% (38/160) and 14.8% (18/122) of the cattle in the Bamenda, Ngaoundere, Garoua and Maroua abattoirs respectively. The minimum estimated prevalence of M. bovis was 2.8% (1.9–3.9), 7.7% (6.1–9.6), 21.3% (15.2–28.4) and 13.1% (7.7–20.4) in the four abattoirs respectively. One M. tuberculosis and three M. bovis strains were recovered from non-lesioned animals. The high prevalence of M. bovis is of public health concern and limits the potential control options in this setting without a viable vaccine as an alternative.
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Affiliation(s)
- N F Egbe
- Microbiology and Parasitology Unit, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Nigeria.,Tuberculosis Reference Laboratory Bamenda, P.O. Box 586 Bamenda, Cameroon
| | - A Muwonge
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - L Ndip
- Laboratory for Emerging Infectious Diseases, University of Buea, Buea, Cameroon.,Department of Biomedical Sciences, Faculty of Health Sciences, University of Buea, Buea, Cameroon
| | - R F Kelly
- Farm Animal Clinical Sciences, School of Veterinary Medicine, University of Glasgow, Glasgow, G61 1QH, UK
| | - M Sander
- Tuberculosis Reference Laboratory Bamenda, P.O. Box 586 Bamenda, Cameroon
| | - V Tanya
- Cameroon Academy of Sciences, P.O. Box 1457 Yaoundé, Cameroon
| | - V Ngu Ngwa
- School of Veterinary Medicine and Sciences, B.P. 454, University of Ngaoundere, Ngaoundere, Cameroon
| | - I G Handel
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - A Novak
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - R Ngandalo
- Laboratoire de Recherches Vétérinaires et Zootechniques de Farcha, N'Djaména, Chad
| | - S Mazeri
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
| | - K L Morgan
- Institute of Ageing and Chronic Disease, University of Liverpool, Leahurst Campus, Neston, Wirral, CH64 7TE, UK
| | - A Asuquo
- Microbiology and Parasitology Unit, Faculty of Allied Medical Sciences, University of Calabar, Calabar, Nigeria
| | - B M de C Bronsvoort
- The Roslin Institute, Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK
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30
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Mezger V, Balzer F, Habicher M, Sander M. [Venous saturation : Between oxygen delivery and consumption]. Med Klin Intensivmed Notfmed 2016; 112:492-498. [PMID: 26931134 DOI: 10.1007/s00063-016-0145-0] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Revised: 12/14/2015] [Accepted: 01/10/2016] [Indexed: 02/08/2023]
Abstract
Venous saturation is an important parameter to assess the ratio between oxygen delivery and oxygen consumption for both intensive care medicine and during perioperative care. Mixed venous saturation (SvO2) is the most reliable parameter in this setting. Due to the high invasiveness of measuring mixed venous saturation, the less invasive central venous saturation (ScvO2) has been entrenched for determining the balance of oxygen delivery and consumption. However, central venous saturation is inferior compared to mixed venous saturation as it does not cover the lower part of the body, including splanchnic perfusion. Nevertheless, studies have shown that central venous saturation is a reliable marker for goal-directed therapy in intensive care medicine, especially in patients with septic or hemorrhagic shock. Furthermore, central venous saturation has deep impact as a prognostic factor concerning morbidity and mortality. It has to be mentioned that not only decreased venous saturations but also elevated venous saturations are associated with poor outcome. Besides mixed venous and central venous saturation, intensivists and anesthesiologists focus on the central venous-arterial pCO2 difference (dCO2). An elevated dCO2 is associated with poor outcome in patients after cardiac surgery or patients with sepsis. Yet, further investigations have to be performed to implement the dCO2 as a reliable marker in daily routine.
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Affiliation(s)
- V Mezger
- Klinik für Anästhesiologie mit Schwerpunkt operative Intensivmedizin, Campus Charité Mitte und Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Deutschland.
| | - F Balzer
- Klinik für Anästhesiologie mit Schwerpunkt operative Intensivmedizin, Campus Charité Mitte und Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Deutschland
| | - M Habicher
- Klinik für Anästhesiologie mit Schwerpunkt operative Intensivmedizin, Campus Charité Mitte und Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Deutschland
| | - M Sander
- Klinik für Anaesthesiologie und Operative Intensivmedizin, Universitätsklinikum Gießen und Marburg GmbH, Gießen, Deutschland
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31
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Hannemann R, Sander M. Effect of Specimen Geometry and Press-Fit on the Stress Intensity Factor Solution for Scaled Wheelset Axles under Bending. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.prostr.2016.06.316] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Bojahr A, Gohlke M, Leitenberger W, Pudell J, Reinhardt M, von Reppert A, Roessle M, Sander M, Gaal P, Bargheer M. Second Harmonic Generation of Nanoscale Phonon Wave Packets. Phys Rev Lett 2015; 115:195502. [PMID: 26588396 DOI: 10.1103/physrevlett.115.195502] [Citation(s) in RCA: 2] [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: 06/01/2015] [Indexed: 05/06/2023]
Abstract
Phonons are often regarded as delocalized quasiparticles with certain energy and momentum. The anharmonic interaction of phonons determines macroscopic properties of the solid, such as thermal expansion or thermal conductivity, and a detailed understanding becomes increasingly important for functional nanostructures. Although phonon-phonon scattering processes depicted in simple wave-vector diagrams are the basis of theories describing these macroscopic phenomena, experiments directly accessing these coupling channels are scarce. We synthesize monochromatic acoustic phonon wave packets with only a few cycles to introduce nonlinear phononics as the acoustic counterpart to nonlinear optics. Control of the wave vector, bandwidth, and consequently spatial extent of the phonon wave packets allows us to observe nonlinear phonon interaction, in particular, second harmonic generation, in real time by wave-vector-sensitive Brillouin scattering with x-rays and optical photons.
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Affiliation(s)
- A Bojahr
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - M Gohlke
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - W Leitenberger
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - J Pudell
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - M Reinhardt
- Helmholtz Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - A von Reppert
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - M Roessle
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - M Sander
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - P Gaal
- Helmholtz Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
| | - M Bargheer
- Institut für Physik and Astronomie, Universität Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
- Helmholtz Zentrum Berlin, Albert-Einstein-Strasse 15, 12489 Berlin, Germany
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33
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Treskatsch S, Balzer F, Knebel F, Habicher M, Braun JP, Kastrup M, Grubitzsch H, Wernecke KD, Spies C, Sander M. Feasibility and influence of hTEE monitoring on postoperative management in cardiac surgery patients. Int J Cardiovasc Imaging 2015; 31:1327-35. [PMID: 26047772 DOI: 10.1007/s10554-015-0689-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [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] [Received: 03/26/2015] [Accepted: 06/01/2015] [Indexed: 01/20/2023]
Abstract
Monoplane hemodynamic TEE (hTEE) monitoring (ImaCor(®) ClariTEE(®)) might be a useful alternative to continuously evaluate cardiovascular function and we aimed to investigate the feasibility and influence of hTEE monitoring on postoperative management in cardiac surgery patients. After IRB approval we reviewed the electronic data of cardiac surgery patients admitted to our intensive care between 01/01/2012 and 30/06/2013 in a case-controlled matched-pairs design. Patients were eligible for the study when they presented a sustained hemodynamic instability postoperatively with the clinical need of an extended hemodynamic monitoring: (a) hTEE (hTEE group, n = 18), or (b) transpulmonary thermodilution (control group, n = 18). hTEE was performed by ICU residents after receiving an approximately 6-h hTEE training session. For hTEE guided hemodynamic optimization an institutional algorithm was used. The hTEE probe was blindly inserted at the first attempt in all patients and image quality was at least judged to be adequate. The frequency of hemodynamic examinations was higher (ten complete hTEE examinations every 2.6 h) in contrast to the control group (one examination every 8 h). hTEE findings, including five unexpected right heart failure and one pericardial tamponade, led to a change of current therapy in 89% of patients. The cumulative dose of epinephrine was significantly reduced (p = 0.034) and levosimendan administration was significantly increased (p = 0.047) in the hTEE group. hTEE was non-inferior to the control group in guiding norepinephrine treatment (p = 0.038). hTEE monitoring performed by ICU residents was feasible and beneficially influenced the postoperative management of cardiac surgery patients.
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Affiliation(s)
- S Treskatsch
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.
| | - F Balzer
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - F Knebel
- Department of Cardiology, Campus Charité Mitte, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - M Habicher
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - J P Braun
- Department of Anesthesiology, Intensive Care Medicine and Pain Therapy, Klinikum Hildesheim GmbH, Hildesheim, Germany
| | - M Kastrup
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - H Grubitzsch
- Department of Cardiovascular Surgery, Campus Charité Mitte, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | | - C Spies
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - M Sander
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow Klinikum, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
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Abstract
The 20th century saw an unprecedented increase in average human lifespan as well as a rapid decline in human fertility in many countries of the world. The accompanying worldwide change in demographics of human populations is linked to unanticipated and unprecedented economic, cultural, medical, social, public health and public policy challenges, whose full implications on a societal level are only just beginning to be fully appreciated. Some of these implications are discussed in this commentary, an outcome of Cultures of Health and Ageing, a conference co-sponsored by the University of Copenhagen (UCPH) and the Center for Healthy Ageing at UCPH, which took place on 20-21 June 2014 in Copenhagen, Denmark. Questions discussed here include the following: what is driving age-structural change in human populations? how can we create 'age-friendly' societies and promote 'ageing-in-community'? what tools will effectively promote social engagement and prevent social detachment among older individuals? is there a risk that further extension of human lifespan would be a greater burden to the individual and to society than is warranted by the potential benefit of longer life?
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Affiliation(s)
- Miriam Sander
- Page One Editorial Services, 685 Poplar Avenue, Boulder, CO 80304, USA
| | - Bjarke Oxlund
- Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Astrid Jespersen
- Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | - Allan Krasnik
- Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark
| | | | - Rudi Gerardus Johannes Westendorp
- Department of Gerontology and Geriatrics, Leyden Academy on Vitality and Ageing, Leiden University Medical Centre, Leiden, Netherlands
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Knudsen TB, Keller DA, Sander M, Carney EW, Doerrer NG, Eaton DL, Fitzpatrick SC, Hastings KL, Mendrick DL, Tice RR, Watkins PB, Whelan M. FutureTox II: in vitro data and in silico models for predictive toxicology. Toxicol Sci 2015; 143:256-67. [PMID: 25628403 PMCID: PMC4318934 DOI: 10.1093/toxsci/kfu234] [Citation(s) in RCA: 100] [Impact Index Per Article: 11.1] [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] [Indexed: 11/13/2022] Open
Abstract
FutureTox II, a Society of Toxicology Contemporary Concepts in Toxicology workshop, was held in January, 2014. The meeting goals were to review and discuss the state of the science in toxicology in the context of implementing the NRC 21st century vision of predicting in vivo responses from in vitro and in silico data, and to define the goals for the future. Presentations and discussions were held on priority concerns such as predicting and modeling of metabolism, cell growth and differentiation, effects on sensitive subpopulations, and integrating data into risk assessment. Emerging trends in technologies such as stem cell-derived human cells, 3D organotypic culture models, mathematical modeling of cellular processes and morphogenesis, adverse outcome pathway development, and high-content imaging of in vivo systems were discussed. Although advances in moving towards an in vitro/in silico based risk assessment paradigm were apparent, knowledge gaps in these areas and limitations of technologies were identified. Specific recommendations were made for future directions and research needs in the areas of hepatotoxicity, cancer prediction, developmental toxicity, and regulatory toxicology.
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Affiliation(s)
- Thomas B Knudsen
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Douglas A Keller
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Miriam Sander
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Edward W Carney
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Nancy G Doerrer
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - David L Eaton
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Suzanne Compton Fitzpatrick
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Kenneth L Hastings
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Donna L Mendrick
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Raymond R Tice
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Paul B Watkins
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
| | - Maurice Whelan
- United States Environmental Protection Agency, Research Triangle Park, North Carolina 27711, Sanofi, Bridgewater, New Jersey 08807, Page One Editorial Services, Boulder, Colorado 80304, Dow Chemical Company, Midland, Michigan 48674, Health and Environmental Sciences Institute, Washington, District of Columbia 20005, University of Washington, Seattle, Washington 98105, United States Food and Drug Administration, Silver Spring, Maryland 20993, Sanofi, Bethesda, Maryland 20814, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709, University of North Carolina, Chapel Hill, North Carolina 27599, The Hamner Institutes, Research Triangle Park, North Carolina 27709, and European Commission Joint Research Centre, I-21027 Ispra, Italy
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Sander M, Becker S, Thiery J, Ceglarek U. Simultaneous Identification and Quantification of Triacyglycerol Species in Human Plasma by Flow-Injection Electrospray Ionization Tandem Mass Spectrometry. Chromatographia 2014. [DOI: 10.1007/s10337-014-2782-x] [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: 01/28/2023]
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Rosenthal C, Rau J, Volk T, Sander M, Ziemer S, Von Heymann C. High-dose fibrinogen versus a clinically recommended dose of fresh frozen plasma for reversal of dilutional coagulopathy in an in vitro model of severe hemodilution. Minerva Anestesiol 2014; 80:894-903. [PMID: 24398441] [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] [Indexed: 06/03/2023]
Abstract
BACKGROUND Volume substitution using colloids and crystalloids dose-dependently induces dilutional coagulopathy. For treatment, fibrinogen concentrate and fresh frozen plasma are options, though the effective dosage of either agent is unclear. The objective of this study was to evaluate, whether high-dose fibrinogen or recommended doses of fresh frozen plasma are equally effective in reversing profound dilutional coagulopathy in vitro. METHODS Blood samples of ten healthy volunteers were diluted by 60% with normal saline, balanced 4% gelatin, or balanced 6% hydroxyethyl starch 130/0.42, and supplemented with either 85mg/kg fibrinogen concentrate or 20mL/kg fresh frozen plasma. Conventional coagulation assays (prothrombin time, activated partial thromboplastin time, plasma fibrinogen, factors V and VIII), and activated rotational thromboelastometry (EXTEM: clotting time, clot formation time, FIBTEM maximum clot firmness) were performed in all samples. RESULTS For saline and gelatin dilutions, plasma fibrinogen and thromboelastometry parameters normalized by fibrinogen concentrate, while conventional coagulation assays and factors V and VIII remained unaffectedly impaired. Fresh frozen plasma improved both conventional coagulation assays, coagulation factors, and thromboelastometry parameters in saline and gelatin dilutions. For hydroxyethyl starch dilutions, plasma fibrinogen increased by fresh frozen plasma, and even normalized by fibrinogen concentrate. Conventional coagulation assays and factors V and VIII improved by fresh frozen plasma only. Thromboelastometry parameters remained mainly unaffected impaired by both fibrinogen concentrate and fresh frozen plasma. CONCLUSION High-dose fibrinogen concentrate and clinically recommended doses of fresh frozen plasma are equally effective and can partially restore viscoelastic coagulation assays in profound saline and gelatin dilutions, but only fresh frozen plasma improves conventional coagulation assays. Hydroxyethyl starch-induced disturbance of fibrin polymerization is neither restored by fibrinogen concentrate nor fresh frozen plasma.
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Affiliation(s)
- C Rosenthal
- Department of Anesthesiology and Intensive Care Medicine, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-University Medicine Berlin, Berlin, Germany -
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Sander M, Lewerenz HJ, Jaegermann W, Schmeißer D. Simulation of electrochemical interface properties: UHV-investigation on CuInSe2and CuInS2. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/bbpc.19870910438] [Citation(s) in RCA: 12] [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: 11/09/2022]
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Müller T, Sander M. On the use of ultrasonic fatigue testing technique--variable amplitude loadings and crack growth monitoring. Ultrasonics 2013; 53:1417-1424. [PMID: 23597637 DOI: 10.1016/j.ultras.2013.03.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 03/04/2013] [Accepted: 03/11/2013] [Indexed: 06/02/2023]
Abstract
In the very high cycle fatigue regime high-frequency testing techniques are required. Using the ultrasonic fatigue technique, testing time could be reduced significantly in comparison to conventional servo-hydraulic machines. An ultrasonic fatigue testing system developed by the BOKU Vienna with load frequencies of about 20kHz is used for variable amplitude loading investigations in the VHCF regime. Therefore, the amplitude level during fatigue tests is controlled by a PC using an own developed software. Additionally, an in situ reconstruction of a damage equivalent load spectrum based on a load time history is introduced schematically. To optimize the experimental procedure a temperature-controlled pulse-pause adaption has been developed and implemented into the software. For quantifying the influence of variable amplitude loadings on the fatigue life, e.g. load interaction effects, the crack growth is measured by using the potential drop technique that is adapted to the ultrasonic fatigue testing system. Finally, the results of two-step-block loading tests are presented.
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Affiliation(s)
- T Müller
- Institute of Structural Mechanics-StM, University of Rostock, Albert-Einstein-Str. 2, D-18059 Rostock, Germany.
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Abstract
This article reports on the outcome of FutureTox, a Society of Toxicology (SOT) Contemporary Concepts in Toxicology (CCT) workshop, whose goal was to address the challenges and opportunities associated with implementing 21st century technologies for toxicity testing, hazard identification, and risk assessment. One goal of the workshop was to facilitate an interactive multisector and discipline dialog. To this end, workshop invitees and participants included stakeholders from governmental and regulatory agencies, research institutes, academia, and the chemical and pharmaceutical industry in Europe and the United States. The workshop agenda was constructed to collectively review and discuss the state-of-the-science in these fields, better define the problems and challenges, outline their collective goals for the future, and identify areas of common agreement key to advancing these technologies into practice.
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Gillies MA, Habicher M, Jhanji S, Sander M, Mythen M, Hamilton M, Pearse RM. Incidence of postoperative death and acute kidney injury associated with i.v. 6% hydroxyethyl starch use: systematic review and meta-analysis. Br J Anaesth 2013; 112:25-34. [PMID: 24046292 DOI: 10.1093/bja/aet303] [Citation(s) in RCA: 147] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Trials suggest that the use of i.v. hydroxyethyl starch (HES) solutions is associ-ated with increased risk of death and acute kidney injury (AKI) in critically ill patients. It is uncertain whether similar adverse effects occur in surgical patients. METHODS Systematic review and meta-analysis of trials in which patients were randomly allocated to 6% HES solutions or alternative i.v. fluids in patients undergoing surgery. Ovid Medline, Embase, Cinhal, and Cochrane Database of Systematic Reviews were searched for trials comparing 6% HES with clinically relevant non-starch comparator. The primary end-point was hospital mortality. Secondary endpoints were requirement for renal replacement therapy (RRT) and author-defined AKI. Pre-defined subgroups were cardiac and non-cardiac surgery. RESULTS Four hundred and fifty-six papers were identified; of which 19 met the inclusion criteria. In total, 1567 patients were included in the analysis. Dichotomous outcomes were expressed as a difference of proportions [risk difference (RD)]. There was no difference in hospital mortality [RD 0.00, 95% confidence interval (CI) -0.02, 0.02], requirement for RRT (RD -0.01, 95% CI -0.04, 0.02), or AKI (RD 0.02, 95% CI -0.02 to 0.06) between compared arms overall or in predefined subgroups. CONCLUSIONS We did not identify any differences in the incidence of death or AKI in surgical patients receiving 6% HES. Included studies were small with low event rates and low risk of heterogeneity. Narrow CIs suggest that these findings are valid. Given the absence of demonstrable benefit, we are unable to recommend the use of 6% HES solution in surgical patients.
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Affiliation(s)
- M A Gillies
- Department of Critical Care, Royal Infirmary of Edinburgh, Little France Crescent, Edinburgh EH16 4SA, UK
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Rasmussen LJ, Shiloh Y, Bergersen LH, Sander M, Bohr VA, Tønjum T. DNA damage response, bioenergetics, and neurological disease: the challenge of maintaining brain health in an aging human population. Mech Ageing Dev 2013; 134:427-33. [PMID: 23665461 PMCID: PMC5903438 DOI: 10.1016/j.mad.2013.05.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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] [Indexed: 02/04/2023]
Affiliation(s)
- Lene Juel Rasmussen
- Center for Healthy Aging, Faculty of Health Sciences, University of Copenhagen, Denmark
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Bent LR, Sander M, Bolton PS, Macefield VG. The vestibular system does not modulate fusimotor drive to muscle spindles in contracting leg muscles of seated subjects. Exp Brain Res 2013; 227:175-83. [PMID: 23552997 DOI: 10.1007/s00221-013-3497-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 03/20/2013] [Indexed: 02/02/2023]
Abstract
We previously showed that sinusoidal galvanic vestibular stimulation (GVS) does not modulate the firing of spontaneously active muscle spindles in relaxed human leg muscles. However, given that there is little, if any, fusimotor drive to relaxed human muscles, we tested the hypothesis that vestibular modulation of muscle spindles becomes apparent during volitional contractions at levels that engage the fusimotor system. Unitary recordings were made from 28 muscle spindle afferents via tungsten microelectrodes inserted percutaneously into the common peroneal nerve of seated awake human subjects. Twenty-one of the spindle afferents were spontaneously active at rest and each increased its firing rate during a weak static contraction; seven were silent at rest and were recruited during the contraction. Sinusoidal bipolar binaural galvanic vestibular stimulation (±2 mA, 100 cycles) was applied to the mastoid processes at 0.8 Hz. This continuous stimulation produced a sustained illusion of "rocking in a boat" or "swinging in a hammock" but no entrainment of EMG. Despite these robust vestibular illusions, none of the fusimotor-driven muscle spindles exhibited phase-locked modulation of firing during sinusoidal GVS. We conclude that this dynamic vestibular input was not sufficient to modulate the firing of fusimotor neurones recruited during a voluntary steady-state contraction, arguing against a significant role of the vestibular system in adjusting the sensitivity of muscle spindles via fusimotor neurones.
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Affiliation(s)
- L R Bent
- Department of Human Health and Nutritional Services, University of Guelph, Guelph, Canada
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Seiffert M, Sander M, Vollert I, Eder A, Schaaf S, Conradi L, Schulze T, Uebeler J, Aksehirlioglu B, Reichenspurner H, Hansen A, Eschenhagen T. Oxygen diffusion in fibrin-based engineered heart tissue and the effect of artificial oxygen carriers. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332579] [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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Schneegans SM, Rosenberger A, Engel U, Sander M, Emons G, Shoukier M. Validation of three BRCA1/2 mutation-carrier probability models Myriad, BRCAPRO and BOADICEA in a population-based series of 183 German families. Fam Cancer 2012; 11:181-8. [PMID: 22160602 PMCID: PMC3365232 DOI: 10.1007/s10689-011-9498-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [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] [Indexed: 12/13/2022]
Abstract
Many studies have evaluated the performance of risk assessment models for BRCA1/2 mutation carrier probabilities in different populations, but to our knowledge very few studies have been conducted in the German population so far. In the recent study, we validated the performance of three risk calculation models by names BRCAPRO, Myriad and BOADICEA in 183 German families who had undergone molecular testing of mutations in BRCA1 and BRCA2 with an indication based on clinical criteria regarding their family history of cancer. The sensitivity and specificity at the conventional threshold of 10% as well as for a threshold of 20% were evaluated. The ability to discriminate between carriers and non-carriers was judged by the area under the receiver operating characteristics curve. We further focused on the performance characteristic of these models in patients carrying large genomic rearrangements as a subtype of mutations which is currently gaining increasing importance. BRCAPRO and BOADICEA performed almost equally well in our patient population, but we found a lack of agreement to Myriad. The results obtained from this study were consistent with previously published results from other population and racial/ethnic groups. We suggest using model specific decision thresholds instead of the recommended universal value of 10%. We further suggest integrating the CaGene5 software package, which includes BRCAPRO and Myriad, in the genetic counselling of German families with suspected inherited breast and ovarian cancer because of the good performance of BRCAPRO and the substantial ease of use of this software.
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Affiliation(s)
- S M Schneegans
- Institute of Human Genetics, University Medical Center, Georg August University Göttingen, Heinrich-Düker-Weg 12, 37073, Göttingen, Germany
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Grubitzsch H, Laule M, Stangl K, Lembcke A, Sander M, Christ T, Konertz W. Bacterial endocarditis within a totally calcified homograft after aortic root replacement: successful treatment by combining conventional and transcatheter techniques. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297873] [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: 10/14/2022]
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Abstract
The IARU Congress on Aging, Longevity and Health, held on 5-7 October 2010 in Copenhagen, Denmark, was hosted by Rector Ralf Hemmingsen, University of Copenhagen and Dean Ulla Wewer, Faculty of Health Sciences, University of Copenhagen and was organized by Center for Healthy Aging (CEHA) under the leadership of CEHA Managing Director Lene Juel Rasmussen and Prof. Vilhelm Bohr, National Institute on Aging, NIH, Baltimore, USA (associated to CEHA). The Congress was attended by approximately 125 researchers interested in and/or conducting research on aging and aging-related topics. The opening Congress Session included speeches by Ralf Hemmingsen, Ulla Wewer, and Lene Juel Rasmussen and Keynote Addresses by four world renowned aging researchers: Povl Riis (The Age Forum), Bernard Jeune (University of Southern Denmark), George Martin (University of Washington, USA) and Jan Vijg (Albert Einstein School of Medicine, USA) as well as a lecture discussing the art-science interface by Thomas Söderqvist (Director, Medical Museion, University of Copenhagen). The topics of the first six Sessions of the Congress were: Neuroscience and DNA damage, Aging and Stress, Life Course, Environmental Factors and Neuroscience, Muscle and Life Span and Life Span and Mechanisms. Two additional Sessions highlighted ongoing research in the recently established Center for Healthy Aging at the University of Copenhagen. This report highlights outcomes of recent research on aging-related topics, as described at the IARU Congress on Aging, Longevity and Health.
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Affiliation(s)
- Lene Juel Rasmussen
- Center for Healthy Aging, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3B, 2200 Copenhagen, Denmark.
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Niedernhofer LJ, Bohr VA, Sander M, Kraemer KH. Xeroderma pigmentosum and other diseases of human premature aging and DNA repair: molecules to patients. Mech Ageing Dev 2011; 132:340-7. [PMID: 21708183 DOI: 10.1016/j.mad.2011.06.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 06/01/2011] [Accepted: 06/06/2011] [Indexed: 12/24/2022]
Abstract
A workshop(1) to share, consider and discuss the latest developments in understanding xeroderma pigmentosum and other human diseases caused by defects in nucleotide excision repair (NER) of DNA damage was held on September 21-24, 2010 in Virginia. It was attended by approximately 100 researchers and clinicians, as well as several patients and representatives of patient support groups. This was the third in a series of workshops with similar design and goals: to emphasize discussion and interaction among participants as well as open exchange of information and ideas. The participation of patients, their parents and physicians was an important feature of this and the preceding two workshops. Topics discussed included the natural history and clinical features of the diseases, clinical and laboratory diagnosis of these rare diseases, therapeutic strategies, mouse models of neurodegeneration, molecular analysis of accelerated aging, impact of transcriptional defects and mitochondrial dysfunction on neurodegeneration, and biochemical insights into mechanisms of NER and base excision repair.
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Bergersen LH, Sander M, Storm-Mathisen J. What the nose knows, what the eyes see, how we feel, how we learn, how we understand motor acts, why "YY" is essential for ion transport, how epigenetics meet neurobiology in Rett syndrome: seven topics at the 2010 Kavli Prize Symposium on Neuroscience. Neuroscience 2011; 190:1-11. [PMID: 21624437 DOI: 10.1016/j.neuroscience.2011.05.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2011] [Accepted: 05/16/2011] [Indexed: 10/18/2022]
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Sander M, Begley TJ, Desaintes C, Gavin AC, Pelroy R, Pothof J, Shiloh Y, van Gent D, Van Houten B, Yaffe M, Mullenders L. 3rd US-EU workshop: systems level understanding of DNA damage responses. Mutat Res 2010; 692:53-60. [PMID: 20727903 PMCID: PMC2948618 DOI: 10.1016/j.mrfmmm.2010.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 07/22/2010] [Accepted: 07/30/2010] [Indexed: 05/29/2023]
Abstract
The 3rd US-EU Workshop on systems level understanding of DNA damage responses was held from March 30 to April 1, 2009 in Egmond aan Zee, The Netherlands. Objectives of the workshop were (1) to assess the current science of the DDR, in particular network level responses to chemotherapeutic and environmentally induced DNA damage; and (2) to establish the basis for a reciprocal scientific exchange program between the EU and US in the relevant areas of DDR research. Here, we report the highlights of the meeting program and conclude that this third meeting in 2009 refined the role of DDR networks in human disease.
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Affiliation(s)
- Miriam Sander
- University at Albany, SUNY, Rensselaer, New York, NY 12144-3456, USA
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