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Kostova V, Hanke D, Kaspar H, Fiedler S, Schwarz S, Krüger-Haker H. Macrolide resistance in Mannheimia haemolytica isolates associated with bovine respiratory disease from the German national resistance monitoring program GE RM-Vet 2009 to 2020. Front Microbiol 2024; 15:1356208. [PMID: 38495516 PMCID: PMC10940430 DOI: 10.3389/fmicb.2024.1356208] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Accepted: 02/13/2024] [Indexed: 03/19/2024] Open
Abstract
Data collected from the German national resistance monitoring program GERM-Vet showed slowly increasing prevalence of macrolide resistance among bovine respiratory disease (BRD)-associated Pasteurellacae from cattle over the last decade. The focus of this study was to analyze the genetic basis of antimicrobial resistance (AMR) and the prevalence of multidrug-resistance (MDR)-mediating integrative and conjugative elements (ICEs) in 13 German BRD-associated Mannheimia haemolytica isolates collected between 2009 and 2020 via whole-genome sequencing. Antimicrobial susceptibility testing (AST) was performed via broth microdilution according to the recommendations of the Clinical and Laboratory Standards Institute for the macrolides erythromycin, tilmicosin, tulathromycin, gamithromycin, tildipirosin, and tylosin as well as 25 other antimicrobial agents. All isolates either had elevated MICs or were resistant to at least one of the macrolides tested. Analysis of whole-genome sequences obtained by hybrid assembly of Illumina MiSeq and Oxford Nanopore MinION reads revealed the presence of seven novel Tn7406-like ICEs, designated Tn7694, and Tn7724- Tn7729. These ICEs harbored the antimicrobial resistance genes erm(T), mef (C), mph(G), floR, catA3, aad(3")(9), aph(3')-Ia, aac(3)-IIa, strA, strB, tet(Y), and sul2 in different combinations. In addition, mutational changes conferring resistance to macrolides, nalidixic acid or streptomycin, respectively, were detected among the M. haemolytica isolates. In addition, four isolates carried a 4,613-bp plasmid with the β-lactamase gene blaROB - 1. The detection of the macrolide resistance genes erm(T), mef (C), and mph(G) together with other resistance genes on MDR-mediating ICEs in bovine M. haemolytica may explain the occurrence of therapeutic failure when treating BRD with regularly used antimicrobial agents, such as phenicols, penicillins, tetracyclines, or macrolides. Finally, pathogen identification and subsequent AST is essential to ensure the efficacy of the antimicrobial agents applied to control BRD in cattle.
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Affiliation(s)
- Valeria Kostova
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Dennis Hanke
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Heike Kaspar
- Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Stefan Fiedler
- Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Stefan Schwarz
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Henrike Krüger-Haker
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
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Pallarz S, Fiedler S, Wahler D, Lämke J, Grohmann L. Reproducibility of next-generation-sequencing-based analysis of a CRISPR/Cas9 genome edited oil seed rape. Food Chem (Oxf) 2023; 7:100182. [PMID: 37822547 PMCID: PMC10562171 DOI: 10.1016/j.fochms.2023.100182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 09/08/2023] [Accepted: 09/10/2023] [Indexed: 10/13/2023]
Abstract
Next-generation-sequencing (NGS) becomes increasingly important for laboratories tasked with the detection of genetically modified organisms (GMOs) in food, feed and seeds. Its implementation into standardized workflows demands reliable intra- and inter-laboratory reproducibility. Here, we analyze the reproducibility of short- and long-read targeted NGS and long-read whole genome sequencing (WGS) data between three independent laboratories. Replicate samples were submitted for sequencing and comparatively analyzed. The targeted-NGS-samples consisted of oil seed rape (OSR) sampled from a commodity shipment spiked with a genome edited (GE) OSR and the WGS-samples consisted of leaf material from the GMOs' parental line. All laboratories delivered highly reproducible high-quality targeted NGS data with little variation. The detection of GMO-related sequences works well regardless of the facility, while the mapping to the complex genome is superior using long read data. Long read WGS is currently not suitable for routine use in enforcement laboratories, due to a large inter-laboratory variation.
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Affiliation(s)
- Steffen Pallarz
- Department Genetic Engineering and Other Biotechnological Processes, Federal Office of Consumer Protection and Food Safety (BVL), P.O. Box 110260, 10832 Berlin, Germany
| | - Stefan Fiedler
- Department Method Standardisation, Reference Laboratories, Resistance To Antibiotics, Federal Office of Consumer Protection and Food Safety (BVL), P.O. Box 110260, 10832 Berlin, Germany
| | - Daniela Wahler
- Department Genetic Engineering and Other Biotechnological Processes, Federal Office of Consumer Protection and Food Safety (BVL), P.O. Box 110260, 10832 Berlin, Germany
| | - Jörn Lämke
- Department Method Standardisation, Reference Laboratories, Resistance To Antibiotics, Federal Office of Consumer Protection and Food Safety (BVL), P.O. Box 110260, 10832 Berlin, Germany
| | - Lutz Grohmann
- Department Genetic Engineering and Other Biotechnological Processes, Federal Office of Consumer Protection and Food Safety (BVL), P.O. Box 110260, 10832 Berlin, Germany
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Krüger-Haker H, Ji X, Hanke D, Fiedler S, Feßler AT, Jiang N, Kaspar H, Wang Y, Wu C, Schwarz S. Genomic Diversity of Methicillin-Resistant Staphylococcus aureus CC398 Isolates Collected from Diseased Swine in the German National Resistance Monitoring Program GE RM-Vet from 2007 to 2019. Microbiol Spectr 2023; 11:e0077023. [PMID: 37154741 PMCID: PMC10269607 DOI: 10.1128/spectrum.00770-23] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 04/14/2023] [Indexed: 05/10/2023] Open
Abstract
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) clonal complex 398 (CC398) isolates (n = 178) collected in the national resistance monitoring program GERM-Vet from diseased swine in Germany from 2007 to 2019 were investigated for their genomic diversity with a focus on virulence and antimicrobial resistance (AMR) traits. Whole-genome sequencing was followed by molecular typing and sequence analysis. A minimum spanning tree based on core-genome multilocus sequence typing was constructed, and antimicrobial susceptibility testing was performed. Most isolates were assigned to nine clusters. They displayed close phylogenetic relationships but a wide molecular variety, including 13 spa types and 19 known and four novel dru types. Several toxin-encoding genes, including eta, seb, sek, sep, and seq, were detected. The isolates harbored a wide range of AMR properties mirroring the proportions of the classes of antimicrobial agents applied in veterinary medicine in Germany. Multiple novel or rare AMR genes were identified, including the phenicol-lincosamide-oxazolidinone-pleuromutilin-streptogramin A resistance gene cfr, the lincosamide-pleuromutilin-streptogramin A resistance gene vga(C), and the novel macrolide-lincosamide-streptogramin B resistance gene erm(54). Many AMR genes were part of small transposons or plasmids. Clonal and geographical correlations of molecular characteristics and resistance and virulence genes were more frequently observed than temporal relations. In conclusion, this study provides insight into population dynamics of the main epidemic porcine LA-MRSA lineage in Germany over a 13-year-period. The observed comprehensive AMR and virulence properties, most likely resulting from the exchange of genetic material between bacteria, highlighted the importance of LA-MRSA surveillance to prevent further dissemination among swine husbandry facilities and entry into the human community. IMPORTANCE The LA-MRSA-CC398 lineage is known for its low host specificity and frequent multiresistance to antimicrobial agents. Colonized swine and their related surroundings represent a considerable risk of LA-MRSA-CC398 colonization or infection for occupationally exposed people through which such isolates might be further disseminated within the human community. This study provides insight into the diversity of the porcine LA-MRSA-CC398 lineage in Germany. Clonal and geographical correlations of molecular characteristics and resistance and virulence traits were detected and may be associated with the spread of specific isolates through livestock trade, human occupational exposure, or dust emission. The demonstrated genetic variability underlines the lineage's ability to horizontally acquire foreign genetic material. Thus, LA-MRSA-CC398 isolates have the potential to become even more dangerous for various host species, including humans, due to increased virulence and/or limited therapeutic options for infection control. Full-scale LA-MRSA monitoring at the farm, community, and hospital level is therefore essential.
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Affiliation(s)
- Henrike Krüger-Haker
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Xing Ji
- Jiangsu Key Laboratory for Food Quality and Safety, State Key Laboratory, Cultivation Base of Ministry of Science and Technology, Institute of Food Safety and Nutrition, Jiangsu Academy of Agricultural Sciences, Nanjing, China
| | - Dennis Hanke
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Stefan Fiedler
- Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Andrea T. Feßler
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Nansong Jiang
- Key Laboratory of Animal Antimicrobial Resistance Surveillance, MARA, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Heike Kaspar
- Federal Office of Consumer Protection and Food Safety (BVL), Berlin, Germany
| | - Yang Wang
- Key Laboratory of Animal Antimicrobial Resistance Surveillance, MARA, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Congming Wu
- Key Laboratory of Animal Antimicrobial Resistance Surveillance, MARA, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Stefan Schwarz
- Institute of Microbiology and Epizootics, Centre for Infection Medicine, School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Veterinary Centre for Resistance Research (TZR), School of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
- Key Laboratory of Animal Antimicrobial Resistance Surveillance, MARA, College of Veterinary Medicine, China Agricultural University, Beijing, China
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Breslin T, Paino J, Wegner M, Engels E, Fiedler S, Forrester H, Rennau H, Bustillo J, Cameron M, Häusermann D, Hall C, Krause D, Hildebrandt G, Lerch M, Schültke E. A Novel Anthropomorphic Phantom Composed of Tissue-Equivalent Materials for Use in Experimental Radiotherapy: Design, Dosimetry and Biological Pilot Study. Biomimetics (Basel) 2023; 8:230. [PMID: 37366825 DOI: 10.3390/biomimetics8020230] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 05/26/2023] [Accepted: 05/28/2023] [Indexed: 06/28/2023] Open
Abstract
The production of anthropomorphic phantoms generated from tissue-equivalent materials is challenging but offers an excellent copy of the typical environment encountered in typical patients. High-quality dosimetry measurements and the correlation of the measured dose with the biological effects elicited by it are a prerequisite in preparation of clinical trials with novel radiotherapy approaches. We designed and produced a partial upper arm phantom from tissue-equivalent materials for use in experimental high-dose-rate radiotherapy. The phantom was compared to original patient data using density values and Hounsfield units obtained from CT scans. Dose simulations were conducted for broad-beam irradiation and microbeam radiotherapy (MRT) and compared to values measured in a synchrotron radiation experiment. Finally, we validated the phantom in a pilot experiment with human primary melanoma cells.
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Affiliation(s)
- Thomas Breslin
- Department of Oncology, Clinical Sciences, Lund University, 22185 Lund, Sweden
| | - Jason Paino
- Centre of Medical Radiation Physics, University of Wollongong, Wollongong 2522, Australia
| | - Marie Wegner
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, 21073 Hamburg, Germany
| | - Elette Engels
- Centre of Medical Radiation Physics, University of Wollongong, Wollongong 2522, Australia
- Australian Synchrotron/ANSTO, Clayton 3168, Australia
| | - Stefan Fiedler
- European Molecular Biology Laboratory (EMBL), Hamburg Outstation, 22607 Hamburg, Germany
| | - Helen Forrester
- School of Science, Royal Melbourne Institute of Technology (RMIT) University, Melbourne 3001, Australia
| | - Hannes Rennau
- Department of Radiooncology, Rostock University Medical Center, 18059 Rostock, Germany
| | - John Bustillo
- Centre of Medical Radiation Physics, University of Wollongong, Wollongong 2522, Australia
| | | | | | | | - Dieter Krause
- Institute of Product Development and Mechanical Engineering Design, Hamburg University of Technology, 21073 Hamburg, Germany
| | - Guido Hildebrandt
- Department of Radiooncology, Rostock University Medical Center, 18059 Rostock, Germany
| | - Michael Lerch
- Centre of Medical Radiation Physics, University of Wollongong, Wollongong 2522, Australia
| | - Elisabeth Schültke
- Department of Radiooncology, Rostock University Medical Center, 18059 Rostock, Germany
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Al-Zeer MA, Prehn F, Fiedler S, Lienert U, Krisch M, Berg J, Kurreck J, Hildebrandt G, Schültke E. Evaluating the Suitability of 3D Bioprinted Samples for Experimental Radiotherapy: A Pilot Study. Int J Mol Sci 2022; 23:ijms23179951. [PMID: 36077349 PMCID: PMC9456381 DOI: 10.3390/ijms23179951] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 08/29/2022] [Accepted: 08/29/2022] [Indexed: 12/22/2022] Open
Abstract
Radiotherapy is an important component in the treatment of lung cancer, one of the most common cancers worldwide, frequently resulting in death within only a few years of diagnosis. In order to evaluate new therapeutic approaches and compare their efficiency with regard to tumour control at a pre-clinical stage, it is important to develop standardized samples which can serve as inter-institutional outcome controls, independent of differences in local technical parameters or specific techniques. Recent developments in 3D bioprinting techniques could provide a sophisticated solution to this challenge. We have conducted a pilot project to evaluate the suitability of standardized samples generated from 3D printed human lung cancer cells in radiotherapy studies. The samples were irradiated at high dose rates using both broad beam and microbeam techniques. We found the 3D printed constructs to be sufficiently mechanically stable for use in microbeam studies with peak doses up to 400 Gy to test for cytotoxicity, DNA damage, and cancer cell death in vitro. The results of this study show how 3D structures generated from human lung cancer cells in an additive printing process can be used to study the effects of radiotherapy in a standardized manner.
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Affiliation(s)
- Munir A. Al-Zeer
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, 13355 Berlin, Germany
- Correspondence: or (M.A.A.-Z.); (E.S.)
| | - Franziska Prehn
- Department of Radiooncology, Rostock University Medical Center, 18059 Rostock, Germany
| | - Stefan Fiedler
- European Molecular Biology Laboratory (EMBL), Hamburg Outstation/DESY, 22607 Hamburg, Germany
| | | | - Michael Krisch
- European Synchrotron Radiation Facility (ESRF), 38043 Grenoble, France
| | - Johanna Berg
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, 13355 Berlin, Germany
| | - Jens Kurreck
- Department of Applied Biochemistry, Institute of Biotechnology, Technische Universität Berlin, 13355 Berlin, Germany
| | - Guido Hildebrandt
- Department of Radiooncology, Rostock University Medical Center, 18059 Rostock, Germany
| | - Elisabeth Schültke
- Department of Radiooncology, Rostock University Medical Center, 18059 Rostock, Germany
- Correspondence: or (M.A.A.-Z.); (E.S.)
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Storm S, Bourenkov G, Liz D, Clement B, Agthe M, Von Stetten D, Albers J, Fiedler S, Svergun D, Wilmanns M, Schneider T. EMBL at PETRA4 – an integrated facility for structural biology and imaging. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322094359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Schültke E, Lerch M, Kirschstein T, Lange F, Porath K, Fiedler S, Davis J, Paino J, Engels E, Barnes M, Klein M, Hall C, Häusermann D, Hildebrandt G. Modification of the Langendorff system of the isolated beating heart for experimental radiotherapy at a synchrotron: 4000 Gy in a heart beat. J Synchrotron Radiat 2022; 29:1027-1032. [PMID: 35787570 PMCID: PMC9255585 DOI: 10.1107/s1600577522004489] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 04/28/2022] [Indexed: 05/27/2023]
Abstract
Microbeam radiotherapy could help to cure malignant tumours which are currently still considered therapy-resistant. With an irradiation target in the thoracic cavity, the heart would be one of the most important organs at risk. To assess the acute adverse effects of microbeam irradiation in the heart, a powerful ex vivo tool was created by combining the Langendorff model of the isolated beating mammalian heart with X-Tream dosimetry. In a first pilot experiment conducted at the Biomedical and Imaging Beamline of the Australian Synchrotron, the system was tested at a microbeam peak dose approximately ten times higher than the anticipated future microbeam irradiation treatment doses. The entire heart was irradiated with a dose of 4000 Gy at a dose rate of >6000 Gy s-1, using an array of 50 µm-wide microbeams spaced at a centre-to-centre distance of 400 µm. Although temporary arrhythmias were seen, they reverted spontaneously to a stable rhythm and no cardiac arrest occurred. This amazing preservation of cardiac function is promising for future therapeutic approaches.
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Affiliation(s)
- Elisabeth Schültke
- Department of Radiooncology, Rostock University Medical Center, Südring 75, 18059 Rostock, Germany
| | - Michael Lerch
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia
| | - Timo Kirschstein
- Oscar Langendorff Institute of Physiology, University of Rostock Medical Center, Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock, Rostock, Germany
| | - Falko Lange
- Oscar Langendorff Institute of Physiology, University of Rostock Medical Center, Rostock, Germany
- Center for Transdisciplinary Neurosciences Rostock, Rostock, Germany
| | - Katrin Porath
- Oscar Langendorff Institute of Physiology, University of Rostock Medical Center, Rostock, Germany
| | - Stefan Fiedler
- European Molecular Biology Laboratory, Notkestrasse 85, 22607 Hamburg, Germany
| | - Jeremy Davis
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia
| | - Jason Paino
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia
| | - Elette Engels
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, Australia
| | - Micah Barnes
- Australian Synchrotron/ANSTO, Clayton, Australia
| | - Mitzi Klein
- Australian Synchrotron/ANSTO, Clayton, Australia
| | | | | | - Guido Hildebrandt
- Department of Radiooncology, Rostock University Medical Center, Südring 75, 18059 Rostock, Germany
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Lange F, Kirschstein T, Davis J, Paino J, Barnes M, Klein M, Porath K, Stöhlmacher P, Fiedler S, Frank M, Köhling R, Hildebrandt G, Hausermann D, Lerch M, Schültke E. Microbeam irradiation of the beating rodent heart: an ex vivo study of acute and subacute effects on cardiac function. Int J Radiat Oncol Biol Phys 2022; 114:143-152. [PMID: 35533907 DOI: 10.1016/j.ijrobp.2022.05.001] [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: 12/16/2021] [Revised: 04/13/2022] [Accepted: 05/02/2022] [Indexed: 11/19/2022]
Abstract
PURPOSE Microbeam radiation therapy (MRT) has shown several advantages compared to conventional broad-beam radiotherapy in small animal models, including a better preservation of normal tissue function and improved drug delivery based on a rapidly increased vascular permeability in the target region. Normal tissue tolerance is the limiting factor in clinical radiotherapy. Knowledge of the normal tissue tolerance of organs at risk is therefore a prerequisite in evaluating any new radiotherapy approach. With an irradiation target in the thoracic cavity, the heart would be the most important organ at risk. METHODS AND MATERIALS We used the ex vivo beating rodent heart in the Langendorff perfusion system at the synchrotron in order to administer microbeam irradiation (MBI) with a peak dose of 40 or 400 Gy. By continuously recording the electrocardiogram, the left ventricular pressure, and the aortic pressure before, during and after MBI, we were able to assess acute and subacute effects of MBI on electrophysiological and mechanical cardiac function. In addition, we analyzed histological and ultrastructural sequelae caused by MBI. RESULTS There were no significant changes in heart rate, heart rate variability, systolic increase of left ventricular pressure or aortic pressure. Moreover, the changes of heart rate, left ventricular pressure and aortic pressure by adding 10-5 mol/l norepinephrine to the perfusate, were also not significant between MBI and sham experiments. However, the rate-pressure product as a surrogate marker for maximum workload after MBI was significantly lower compared to sham-irradiated controls. On the structural level, no severe membranous, sarcomeric, mitochondrial or nuclear changes caused by MBI were detected by desmin immunohistochemistry and electron microscopy. CONCLUSION With respect to acute and subacute toxicity, an MBI peak dose up to 400 Gy did not result in severe changes in cardiac electrophysiology or mechanics.
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Affiliation(s)
- Falko Lange
- Oscar Langendorff Institute of Physiology, Rostock University Medical Centre, Rostock, Germany; Centre for Transdisciplinary Neurosciences Rostock, University of Rostock, Rostock, Germany
| | - Timo Kirschstein
- Oscar Langendorff Institute of Physiology, Rostock University Medical Centre, Rostock, Germany; Centre for Transdisciplinary Neurosciences Rostock, University of Rostock, Rostock, Germany.
| | - Jeremy Davis
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia
| | - Jason Paino
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia
| | - Micah Barnes
- Australian Synchrotron-Australian Nuclear Science and Technology Organisation (ANSTO), Kulin Nation, Melbourne, Australia
| | - Mitzi Klein
- Australian Synchrotron-Australian Nuclear Science and Technology Organisation (ANSTO), Kulin Nation, Melbourne, Australia
| | - Katrin Porath
- Oscar Langendorff Institute of Physiology, Rostock University Medical Centre, Rostock, Germany
| | - Paula Stöhlmacher
- Oscar Langendorff Institute of Physiology, Rostock University Medical Centre, Rostock, Germany
| | - Stefan Fiedler
- European Molecular Biology Laboratory (EMBL), Hamburg Outstation/ Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany
| | - Marcus Frank
- Medical Biology and Electron Microscopy Centre, Rostock University Medical Center, Rostock, Germany; Department of Life, Light and Matter, University of Rostock, Rostock, Germany
| | - Rüdiger Köhling
- Oscar Langendorff Institute of Physiology, Rostock University Medical Centre, Rostock, Germany; Centre for Transdisciplinary Neurosciences Rostock, University of Rostock, Rostock, Germany
| | - Guido Hildebrandt
- Department of Radiooncology, Rostock University Medical Centre, Rostock, Germany
| | - Daniel Hausermann
- Australian Synchrotron-Australian Nuclear Science and Technology Organisation (ANSTO), Kulin Nation, Melbourne, Australia
| | - Michael Lerch
- Centre for Medical Radiation Physics, University of Wollongong, Wollongong, New South Wales, Australia; Illawarra Health and Medical Research Institute, Wollongong, New South Wales, Australia
| | - Elisabeth Schültke
- Department of Radiooncology, Rostock University Medical Centre, Rostock, Germany
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Wieczorek A, Manzitti C, Garaventa A, Gray J, Papadakis V, Valteau-Couanet D, Zachwieja K, Poetschger U, Pribill I, Fiedler S, Ladenstein R, Lode HN. Clinical Phenotype and Management of Severe Neurotoxicity Observed in Patients with Neuroblastoma Treated with Dinutuximab Beta in Clinical Trials. Cancers (Basel) 2022; 14:cancers14081919. [PMID: 35454826 PMCID: PMC9026788 DOI: 10.3390/cancers14081919] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/06/2022] [Accepted: 04/08/2022] [Indexed: 02/01/2023] Open
Abstract
Neurotoxicity is an off-tumour, on-target side effect of GD2-directed immunotherapy with monoclonal antibodies. Here, we report the frequency, management and outcome of patients enrolled in two prospective clinical trials who experienced severe neurotoxicity during immunotherapy with the anti-GD2 antibody dinutuximab beta (DB) administered as short-term infusion (HR-NBL1/SIOPEN study, randomisation R2, EudraCT 2006-001489-17) or as long-term infusion (HR-NBL1/SIOPEN study, randomisation R4, EudraCT 2006-001489-17 and LTI/SIOPEN study, EudraCT 2009-018077-31), either alone or with subcutaneous interleukin-2 (scIL-2). The total number of patients included in this analysis was 1102. Overall, 44/1102 patients (4.0%) experienced Grade 3/4 neurotoxicities (HR-NBL1 R2, 21/406; HR-NBL1 R4, 8/408; LTI study, 15/288), including 27 patients with severe neurotoxicities (2.5%). Events occurred predominantly in patients receiving combined treatment with DB and scIL-2. Neurotoxicity was treated using dexamethasone, prednisolone, intravenous immunoglobulins and, in two patients, plasmapheresis, which was highly effective. While neurological recovery was observed in 16 of 21 patients with severe neurotoxicities, 5/1102 (0.45%) patients experienced persistent and severe neurological deficits. In conclusion, severe neurotoxicity is most commonly observed in patients receiving DB with scIL-2. Considering the lack of clinical benefit for IL-2 in clinical trials so far, the administration of IL-2 alongside DB is not recommended.
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Affiliation(s)
- Aleksandra Wieczorek
- Pediatric Hematology Oncology, Jagiellonian University Medical College, 30-663 Krakow, Poland;
| | - Carla Manzitti
- Oncology Unit, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (C.M.); (A.G.)
| | - Alberto Garaventa
- Oncology Unit, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (C.M.); (A.G.)
| | - Juliet Gray
- Centre for Cancer Immunology, University of Southampton, Southampton SO16 6YD, UK;
| | - Vassilios Papadakis
- Department of Pediatric Hematology-Oncology, Agia Sofia Children’s Hospital, 11527 Athens, Greece;
| | | | - Katarzyna Zachwieja
- Department of Pediatric Nephrology and Hypertension, Jagiellonian University Medical College, 30-663 Krakow, Poland;
| | - Ulrike Poetschger
- Department for Studies and Statistics and Integrated Research, Children’s Cancer Research Institute, 1090 Vienna, Austria; (U.P.); (I.P.)
| | - Ingrid Pribill
- Department for Studies and Statistics and Integrated Research, Children’s Cancer Research Institute, 1090 Vienna, Austria; (U.P.); (I.P.)
| | - Stefan Fiedler
- Department for Studies and Statistics and Integrated Research at the Children’s Cancer Research Institute of the St. Anna Children’s Hospital and Department of Paediatrics, Medical University, 1090 Vienna, Austria; (S.F.); (R.L.)
| | - Ruth Ladenstein
- Department for Studies and Statistics and Integrated Research at the Children’s Cancer Research Institute of the St. Anna Children’s Hospital and Department of Paediatrics, Medical University, 1090 Vienna, Austria; (S.F.); (R.L.)
| | - Holger N. Lode
- Pediatric Hematology and Oncology, University Medicine Greifswald, 17475 Greifswald, Germany
- Correspondence: ; Tel.: +49-3834-86-6300
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10
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Schültke E, Bayat S, Bartzsch S, Bräuer-Krisch E, Djonov V, Fiedler S, Fernandez-Palomo C, Jaekel F, Pellicioli P, Trappetti V, Hildebrandt G. A Mouse Model for Microbeam Radiation Therapy of the Lung. Int J Radiat Oncol Biol Phys 2021; 110:521-525. [DOI: 10.1016/j.ijrobp.2020.12.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 10/28/2020] [Accepted: 12/20/2020] [Indexed: 01/15/2023]
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11
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Schültke E, Fiedler S, Menk RH, Jaekel F, Dreossi D, Casarin K, Tromba G, Bartzsch S, Kriesen S, Hildebrandt G, Arfelli F. Perspectives for microbeam irradiation at the SYRMEP beamline. J Synchrotron Radiat 2021; 28:410-418. [PMID: 33650552 PMCID: PMC7941286 DOI: 10.1107/s1600577521000400] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 01/12/2021] [Indexed: 05/10/2023]
Abstract
It has been shown previously both in vitro and in vivo that microbeam irradiation (MBI) can control malignant tumour cells more effectively than the clinically established concepts of broad beam irradiation. With the aim to extend the international capacity for microbeam research, the first MBI experiment at the biomedical beamline SYRMEP of the Italian synchrotron facility ELETTRA has been conducted. Using a multislit collimator produced by the company TECOMET, arrays of quasi-parallel microbeams were successfully generated with a beam width of 50 µm and a centre-to-centre distance of 400 µm. Murine melanoma cell cultures were irradiated with a target dose of approximately 65 Gy at a mean photon energy of ∼30 keV with a dose rate of 70 Gy s-1 and a peak-to-valley dose of ∼123. This work demonstrated a melanoma cell reduction of approximately 80% after MBI. It is suggested that, while a high energy is essential to achieve high dose rates in order to deposit high treatment doses in a short time in a deep-seated target, for in vitro studies and for the treatment of superficial tumours a spectrum in the lower energy range might be equally suitable or even advantageous.
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Affiliation(s)
- Elisabeth Schültke
- Department of Radiooncology, Rostock University Medical Center, Südring 75, 18059 Rostock, Germany
| | - Stefan Fiedler
- European Molecular Biology Laboratory, Notkestrasse 85, 22607 Hamburg, Germany
| | - Ralf Hendrik Menk
- Elettra-Sincrotrone Trieste, Strada Statale 14, Trieste 34149, Italy
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Trieste Section, Istituto Nazionale Fisica Nucleare (INFN), Trieste, Italy
| | - Felix Jaekel
- Department of Radiooncology, Rostock University Medical Center, Südring 75, 18059 Rostock, Germany
| | - Diego Dreossi
- Elettra-Sincrotrone Trieste, Strada Statale 14, Trieste 34149, Italy
| | - Katia Casarin
- Elettra-Sincrotrone Trieste, Strada Statale 14, Trieste 34149, Italy
| | - Giuliana Tromba
- Elettra-Sincrotrone Trieste, Strada Statale 14, Trieste 34149, Italy
| | - Stefan Bartzsch
- Department of Radiooncology, Technical University Munich, Munich, Germany
- Institute for Innovative Radiotherapy, Helmholtz-Zentrum Munich (HMGU), Munich, Germany
| | - Stephan Kriesen
- Department of Radiooncology, Rostock University Medical Center, Südring 75, 18059 Rostock, Germany
| | - Guido Hildebrandt
- Department of Radiooncology, Rostock University Medical Center, Südring 75, 18059 Rostock, Germany
| | - Fulvia Arfelli
- Trieste Section, Istituto Nazionale Fisica Nucleare (INFN), Trieste, Italy
- Department of Physics, University of Trieste, Trieste, Italy
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12
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Hanke K, Fiedler S, Grumann C, Ratmann O, Hauser A, Klink P, Meixenberger K, Altmann B, Zimmermann R, Marcus U, Bremer V, Auwärter V, Bannert N. A Recent Human Immunodeficiency Virus Outbreak Among People Who Inject Drugs in Munich, Germany, Is Associated With Consumption of Synthetic Cathinones. Open Forum Infect Dis 2020; 7:ofaa192. [PMID: 32617370 PMCID: PMC7314588 DOI: 10.1093/ofid/ofaa192] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Accepted: 05/25/2020] [Indexed: 12/12/2022] Open
Abstract
Background Needle and syringe sharing among people who inject drugs (PWID) can result in a rapid regional spread of a human immunodeficiency virus (HIV) variant. Such outbreaks have been identified recently in several countries and have raised public health attention because of an association with new psychoactive substances (NPS). Methods Dried serum spots from approximately 60% of newly diagnosed HIV cases in Germany in 2013–2018 were received together with statutory notification data. Samples were sequenced in the pol-region, genotyped, and viral phylogenies were analyzed. For selected samples, the hepatitis C virus (HCV) status and the presence of NPS were determined. Results An outbreak of closely related 27 subtype C infections with a core of 11 cases with almost identical sequences was identified using phylogenetic analyses. The first case of the outbreak was diagnosed in 2015, and the last one was in 2018. With exception of 3 infections, all were reported from Munich, the capital of the federal state of Bavaria. Of 26 analyzed outbreak members, 24 (92.3%) had a resolved or viremic HCV coinfection. In 8 of 18 (44%) cases, α-pyrrolidinopentiothiophenone and/or the related substance α-pyrrolidinoheptiophenone was identified. Conclusions Despite harm reduction services in place, HIV outbreaks of considerable size can occur in PWID. The establishment of a real-time molecular surveillance is advised to rapidly identify outbreaks and target prevention measures.
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Affiliation(s)
- Kirsten Hanke
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Stefan Fiedler
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Christina Grumann
- Institute of Forensic Medicine, Forensic Toxicology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.,Hermann Staudinger Graduate School, University of Freiburg, Freiburg, Germany
| | - Oliver Ratmann
- Department of Mathematics, Imperial College London, London, United Kingdom
| | - Andrea Hauser
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Patrycja Klink
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | | | - Britta Altmann
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Ruth Zimmermann
- Division of HIV/AIDS, STI, and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Ulrich Marcus
- Division of HIV/AIDS, STI, and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Viviane Bremer
- Division of HIV/AIDS, STI, and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Volker Auwärter
- Institute of Forensic Medicine, Forensic Toxicology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - Norbert Bannert
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany.,Institute of Virology, Charité Universitätsmedizin Berlin, Berlin, Germany
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13
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Hofmann I, Kemter E, Theobalt N, Fiedler S, Bidlingmaier M, Hinrichs A, Aichler M, Burkhardt K, Klymiuk N, Wolf E, Wanke R, Blutke A. Linkage between growth retardation and pituitary cell morphology in a dystrophin-deficient pig model of Duchenne muscular dystrophy. Growth Horm IGF Res 2020; 51:6-16. [PMID: 31926372 DOI: 10.1016/j.ghir.2019.12.006] [Citation(s) in RCA: 5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 12/16/2019] [Accepted: 12/30/2019] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Human patients with Duchenne muscular dystrophy (DMD) commonly exhibit a short stature, but the pathogenesis of this growth retardation is not completely understood. Due to the suspected involvement of the growth hormone/insulin-like growth factor 1 (GH/IGF1) system, controversial therapeutic approaches have been developed, including both GH- administration, as well as GH-inhibition. In the present study, we examined relevant histomorphological and ultrastructural features of adenohypophyseal GH-producing somatotroph cells in a porcine DMD model. METHODS The numbers and volumes of immunohistochemically labelled somatotroph cells were determined in consecutive semi-thin sections of plastic resin embedded adenohypophyseal tissue samples using unbiased state-of-the-art quantitative stereological analysis methods. RESULTS DMD pigs displayed a significant growth retardation, accounting for a 55% reduction of body weight, accompanied by a significant 50% reduction of the number of somatotroph cells, as compared to controls. However, the mean volumes of somatotroph cells and the volume of GH-granules per cell were not altered. Western blot analyses of the adenohypophyseal protein samples showed no differences in the relative adenohypophyseal GH-abundance between DMD pigs and controls. CONCLUSION The findings of this study do not provide evidence for involvement of somatotroph cells in the pathogenesis of growth retardation of DMD pigs. These results are in contrast with previous findings in other dystrophin-deficient animal models, such as the golden retriever model of Duchenne muscular dystrophy, where increased mean somatotroph cell volumes and elevated volumes of intracellular GH-granules were reported and associated with DMD-related growth retardation. Possible reasons for the differences of somatotroph morphology observed in different DMD models are discussed.
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Affiliation(s)
- I Hofmann
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - E Kemter
- Chair for Molecular Animal Breeding and Biotechnology, Gene Centre and Department of Veterinary Sciences, Ludwig-Maximilians-Universität München, Munich, Germany; Centre for Innovative Medical Models (CiMM), Ludwig-Maximilians-Universität München, Oberschleißheim, Germany
| | - N Theobalt
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - S Fiedler
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - M Bidlingmaier
- Medizinische Klinik und Poliklinik IV, Klinikum der Universität München, Munich, Germany
| | - A Hinrichs
- Chair for Molecular Animal Breeding and Biotechnology, Gene Centre and Department of Veterinary Sciences, Ludwig-Maximilians-Universität München, Munich, Germany; Centre for Innovative Medical Models (CiMM), Ludwig-Maximilians-Universität München, Oberschleißheim, Germany
| | - M Aichler
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany
| | - K Burkhardt
- Chair for Molecular Animal Breeding and Biotechnology, Gene Centre and Department of Veterinary Sciences, Ludwig-Maximilians-Universität München, Munich, Germany; Centre for Innovative Medical Models (CiMM), Ludwig-Maximilians-Universität München, Oberschleißheim, Germany
| | - N Klymiuk
- Chair for Molecular Animal Breeding and Biotechnology, Gene Centre and Department of Veterinary Sciences, Ludwig-Maximilians-Universität München, Munich, Germany; Centre for Innovative Medical Models (CiMM), Ludwig-Maximilians-Universität München, Oberschleißheim, Germany
| | - E Wolf
- Chair for Molecular Animal Breeding and Biotechnology, Gene Centre and Department of Veterinary Sciences, Ludwig-Maximilians-Universität München, Munich, Germany; Centre for Innovative Medical Models (CiMM), Ludwig-Maximilians-Universität München, Oberschleißheim, Germany; Laboratory for Functional Genome Analysis (LAFUGA), Gene Centre, Ludwig-Maximilians-Universität München, Munich, Germany
| | - R Wanke
- Institute of Veterinary Pathology at the Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - A Blutke
- Research Unit Analytical Pathology, Helmholtz Zentrum München, Neuherberg, Germany.
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14
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Bellouin N, Quaas J, Gryspeerdt E, Kinne S, Stier P, Watson‐Parris D, Boucher O, Carslaw KS, Christensen M, Daniau A, Dufresne J, Feingold G, Fiedler S, Forster P, Gettelman A, Haywood JM, Lohmann U, Malavelle F, Mauritsen T, McCoy DT, Myhre G, Mülmenstädt J, Neubauer D, Possner A, Rugenstein M, Sato Y, Schulz M, Schwartz SE, Sourdeval O, Storelvmo T, Toll V, Winker D, Stevens B. Bounding Global Aerosol Radiative Forcing of Climate Change. Rev Geophys 2020; 58:e2019RG000660. [PMID: 32734279 PMCID: PMC7384191 DOI: 10.1029/2019rg000660] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/30/2019] [Accepted: 10/03/2019] [Indexed: 05/04/2023]
Abstract
Aerosols interact with radiation and clouds. Substantial progress made over the past 40 years in observing, understanding, and modeling these processes helped quantify the imbalance in the Earth's radiation budget caused by anthropogenic aerosols, called aerosol radiative forcing, but uncertainties remain large. This review provides a new range of aerosol radiative forcing over the industrial era based on multiple, traceable, and arguable lines of evidence, including modeling approaches, theoretical considerations, and observations. Improved understanding of aerosol absorption and the causes of trends in surface radiative fluxes constrain the forcing from aerosol-radiation interactions. A robust theoretical foundation and convincing evidence constrain the forcing caused by aerosol-driven increases in liquid cloud droplet number concentration. However, the influence of anthropogenic aerosols on cloud liquid water content and cloud fraction is less clear, and the influence on mixed-phase and ice clouds remains poorly constrained. Observed changes in surface temperature and radiative fluxes provide additional constraints. These multiple lines of evidence lead to a 68% confidence interval for the total aerosol effective radiative forcing of -1.6 to -0.6 W m-2, or -2.0 to -0.4 W m-2 with a 90% likelihood. Those intervals are of similar width to the last Intergovernmental Panel on Climate Change assessment but shifted toward more negative values. The uncertainty will narrow in the future by continuing to critically combine multiple lines of evidence, especially those addressing industrial-era changes in aerosol sources and aerosol effects on liquid cloud amount and on ice clouds.
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Affiliation(s)
- N. Bellouin
- Department of MeteorologyUniversity of ReadingReadingUK
| | - J. Quaas
- Institute for MeteorologyUniversität LeipzigLeipzigGermany
| | - E. Gryspeerdt
- Space and Atmospheric Physics GroupImperial College LondonLondonUK
| | - S. Kinne
- Max Planck Institute for MeteorologyHamburgGermany
| | - P. Stier
- Atmospheric, Oceanic and Planetary Physics, Department of PhysicsUniversity of OxfordOxfordUK
| | - D. Watson‐Parris
- Atmospheric, Oceanic and Planetary Physics, Department of PhysicsUniversity of OxfordOxfordUK
| | - O. Boucher
- Institut Pierre‐Simon Laplace, Sorbonne Université/CNRSParisFrance
| | - K. S. Carslaw
- School of Earth and EnvironmentUniversity of LeedsLeedsUK
| | - M. Christensen
- Atmospheric, Oceanic and Planetary Physics, Department of PhysicsUniversity of OxfordOxfordUK
| | - A.‐L. Daniau
- EPOC, UMR 5805, CNRS‐Université de BordeauxPessacFrance
| | - J.‐L. Dufresne
- Laboratoire de Météorologie Dynamique/IPSL, CNRS, Sorbonne Université, Ecole Normale Supérieure, PSL Research University, Ecole PolytechniqueParisFrance
| | - G. Feingold
- NOAA ESRL Chemical Sciences DivisionBoulderCOUSA
| | - S. Fiedler
- Max Planck Institute for MeteorologyHamburgGermany
- Now at Institut für Geophysik und MeteorologieUniversität zu KölnKölnGermany
| | - P. Forster
- Priestley International Centre for ClimateUniversity of LeedsLeedsUK
| | - A. Gettelman
- National Center for Atmospheric ResearchBoulderCOUSA
| | - J. M. Haywood
- CEMPSUniversity of ExeterExeterUK
- UK Met Office Hadley CentreExeterUK
| | - U. Lohmann
- Institute for Atmospheric and Climate ScienceETH ZürichZürichSwitzerland
| | | | - T. Mauritsen
- Department of MeteorologyStockholm UniversityStockholmSweden
| | - D. T. McCoy
- School of Earth and EnvironmentUniversity of LeedsLeedsUK
| | - G. Myhre
- Center for International Climate and Environmental Research‐Oslo (CICERO)OsloNorway
| | - J. Mülmenstädt
- Institute for MeteorologyUniversität LeipzigLeipzigGermany
| | - D. Neubauer
- Institute for Atmospheric and Climate ScienceETH ZürichZürichSwitzerland
| | - A. Possner
- Department of Global EcologyCarnegie Institution for ScienceStanfordCAUSA
- Now at Institute for Atmospheric and Environmental SciencesGoethe UniversityFrankfurtGermany
| | | | - Y. Sato
- Department of Applied Energy, Graduate School of Engineering, Nagoya UniversityNagoyaJapan
- Now at Faculty of Science, Department of Earth and Planetary SciencesHokkaido UniversitySapporoJapan
| | - M. Schulz
- Climate Modelling and Air Pollution Section, Research and Development DepartmentNorwegian Meteorological InstituteOsloNorway
| | - S. E. Schwartz
- Brookhaven National Laboratory Environmental and Climate Sciences DepartmentUptonNYUSA
| | - O. Sourdeval
- Institute for MeteorologyUniversität LeipzigLeipzigGermany
- Laboratoire d'Optique AtmosphériqueUniversité de LilleVilleneuve d'AscqFrance
| | - T. Storelvmo
- Department of GeosciencesUniversity of OsloOsloNorway
| | - V. Toll
- Department of MeteorologyUniversity of ReadingReadingUK
- Now at Institute of PhysicsUniversity of TartuTartuEstonia
| | - D. Winker
- NASA Langley Research CenterHamptonVAUSA
| | - B. Stevens
- Max Planck Institute for MeteorologyHamburgGermany
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15
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Pfaff H, Fiedler S. Health literacy of commercial industry managers: an exploratory qualitative study in Germany. Eur J Public Health 2019. [DOI: 10.1093/eurpub/ckz186.431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Managers have been neglected in health literacy research. There still is little known about the health literacy status and needs of commercial industry managers. This study reduces the existing knowledge gap by presenting findings of an exploratory qualitative study.
Methods
We conducted 23 separate semi-structured interviews of managers from all management levels (low, middle and top) and experts in the field of health management and/or personnel management. The qualitative interviews were analysed according to Mayring’s content analytic approach using MAXQDA.
Results
The findings indicate that managers do have considerable information levels about existing health topics and relevant problems but have difficulties of discernment as to which sources of information can be activated or accessed in a timely fashion due to work and information overload. Even those who devise strategies often fail in implementing health-literate behavior. Experts and managers had fairly consistent views on the importance of health literacy among managers. Most agreed that mental health was neglected and that company conditions were important in influencing the ability to act in a way that promoted health literacy. The findings also show that strengthening of managerial self-perception, self-regulation and self-control, raising awareness and ability to take personal responsibility for one’s own health, developing skills in handling large amounts of information and fostering open and trusting communication are all essential.
Conclusions
The findings provide specific points which are important for promoting health literacy among managers. The study underscores the need to incorporate and integrate different perspectives in the implementation of health literacy interventions. To develop health-promoting companies, further research has to provide guides to action for managers and investigate ways in which health literacy can be promoted among managers on all hierarchical levels.
Key messages
Industry managers in this study agreed that their mental health has been neglected and company conditions were important in influencing the ability to act in a way that promoted health literacy. This study reduces the knowledge gap about the health literacy of managers. Further research should focus on promoting mental health and providing guides to action for managers and companies.
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Affiliation(s)
- H Pfaff
- IMVR, University of Cologne, Cologne, Germany
| | - S Fiedler
- IMVR, University of Cologne, Cologne, Germany
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16
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Horrell S, Agthe M, von Stetten D, Mehrabi P, Schulz EC, Bourenkov G, Nikolova M, Karpics I, Fiedler S, Tellkamp F, Miller RD, Huse N, Pearson AR, Schneider TR. P14 T-REXX: first results from the Jurassic beamline. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319095214] [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: 11/10/2022] Open
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17
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von Stetten D, Agthe M, Bourenkov G, Polikarpov M, Horrell S, Yorke B, Beddard GS, Nikolova M, Karpics I, Gehrmann T, Meyer J, Ristau U, Fiedler S, Monteiro DCF, Trebbin M, Mehrabi P, Schulz E, Tellkamp F, Miller RJD, Huse N, Pearson AR, Schneider TR. TREXX: a new endstation for serial time-resolved crystallography at PETRA III. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319095305] [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: 11/11/2022] Open
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18
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Schroer MA, Schewa S, Blanchet CE, Gruzinov AY, Zickmantel T, Fiedler S, Katona G, Roessle M, Svergun DI. Recent developments towards high-flux time-resolved and terahertz SAXS experiments on the EMBL P12 BioSAXS beamline. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319089174] [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: 11/10/2022] Open
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19
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Hauser A, Heiden MAD, Meixenberger K, Han O, Fiedler S, Hanke K, Koppe U, Hofmann A, Bremer V, Bartmeyer B, Kuecherer C, Bannert N. Evaluation of a BioRad Avidity assay for identification of recent HIV-1 infections using dried serum or plasma spots. J Virol Methods 2019; 266:114-120. [PMID: 30738741 DOI: 10.1016/j.jviromet.2019.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/01/2019] [Accepted: 02/06/2019] [Indexed: 02/03/2023]
Abstract
Serological methods to differentiate between recently acquired and established HIV-1 infections are a useful tool in the HIV-surveillance to characterize the epidemic, identify groups at risk and assess HIV-preventive interventions. Therefore, an avidity-based, modified BioRad Genscreen™ HIV-1/2 assay (BRAEUR) was evaluated according to the avidity-based, modified BioRad HIV-1/2 Plus O protocol (BRAUSA). Overall, 692 well defined samples (82.5% B and 17.5% non-B subtypes) from recent (<180 days, n = 239), intermediate (181-364 days, n = 35) or long term infections (≥365 days, n = 419) were used to determine a 'mean duration of recent infection' (MDRI), a 'median DRI' (MdDRI), the false recent rate (FRR), and concordance between the BRAs and the Sedia BED HIV-1 Capture enzyme immunoassay (BED). The optimal avidity index cut-off was determined to be 70% resulting in an MDRI of 233 days (95% IQR: 174-351) and an MdDRI of 171 days (95% IQR: 142-212). Concordance with the BRAUSA was high with 96.4%. The FRR of 6.0% as well as the MdDRI are similar to the BED (8.4%; 170 (139-214) days). Therefore, the BRAEUR is a suitable alternative to replace the BED and trend analysis will be feasible after minimal adjustments for the MdDRI and the MDRI.
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Affiliation(s)
- Andrea Hauser
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany; Charité, Universitätsmedizin, Berlin, Berlin, Germany.
| | - Matthias An der Heiden
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | | | - Orjin Han
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany; School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, South Korea
| | - Stefan Fiedler
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Kirsten Hanke
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Uwe Koppe
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Alexandra Hofmann
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany; Charité, Universitätsmedizin, Berlin, Berlin, Germany
| | - Viviane Bremer
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Barbara Bartmeyer
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Claudia Kuecherer
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Norbert Bannert
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany; Charité, Universitätsmedizin, Berlin, Berlin, Germany.
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20
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Hauser A, Meixenberger K, Machnowska P, Fiedler S, Hanke K, Hofmann A, Bartmeyer B, Bremer V, Bannert N, Kuecherer C. Robust and sensitive subtype-generic HIV-1 pol genotyping for use with dried serum spots in epidemiological studies. J Virol Methods 2018; 259:32-38. [PMID: 29859195 DOI: 10.1016/j.jviromet.2018.05.013] [Citation(s) in RCA: 6] [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: 01/30/2018] [Revised: 05/23/2018] [Accepted: 05/29/2018] [Indexed: 10/14/2022]
Abstract
HIV-1 genotyping of larger pol-fragments from dried serum/plasma spots (DSS/DPS) is often hindered by RNA-degradation during transportation at ambient temperature. We evaluated an in-house HIV-1 DSS/DPS-genotyping assay designed in two shorter overlapping fragments covering all resistance mutations in protease and reverse transcriptase. Validation criteria such as specificity, detection limit, accuracy, reproducibility and storage conditions were assessed using reference plasma samples prepared as DPS and clinical DSS from the German molecular HIV-1 surveillance processed under real-life transportation conditions. The specificity was 100% for both samples types, and the experimental DPS detection limit of 1000 copies/ml yielded a 98.7% (3,329/3373) success rate for DSS (including all subtypes) above this detection limit. Accuracy for DPS compared to the gold standard was 99.1% and the reproducibility was 100% for DPS replicates and 99.9% for DSS pairs. Storage of DPS at room temperature was possible for 90 or 30 days and at -20 °C for at least 180 or 90 days at viral loads of 10,000 or 1000 copies/ml, respectively. The HIV-1 pol-genotyping assay presented here is a sensitive, robust and subtype generic tool for a large-scale population-based HIV-1 drug resistance surveillance for the use of DSS/DPS.
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Affiliation(s)
- Andrea Hauser
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany.
| | | | - Patrycja Machnowska
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Stefan Fiedler
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Kirsten Hanke
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Alexandra Hofmann
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch-Institute, Berlin, Germany; Charité, Universitätsmedizin, Berlin, Germany
| | - Barbara Bartmeyer
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch-Institute, Berlin, Germany
| | - Viviane Bremer
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch-Institute, Berlin, Germany
| | - Norbert Bannert
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Claudia Kuecherer
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
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Fiedler S, Ladenstein RL, Poetschger U, Abbasi R, Vicha A, Ash S, Garaventa A, Chan GCF, Balwierz W, Ussowicz M, Tweddle D, Schleiermacher G, Mann G, Gabriel A, Jeison M, Klijanienko J, Morini M, Valteau Couanet D, Ambros IM, Ambros PF. Risk prediction based on post induction bone marrow response and genomic profile: A new way to stratify stage M neuroblastoma patients? J Clin Oncol 2018. [DOI: 10.1200/jco.2018.36.15_suppl.10550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
| | - Ruth Lydia Ladenstein
- St. Anna Children's Hospital and Department of Paediatrics, Medical University, Vienna, Austria
| | | | - Reza Abbasi
- Children’s Cancer Research Institute, Vienna, Austria
| | - Ales Vicha
- Charles University of Prague and Motol University Hospital, Praha, CZ
| | - Shifra Ash
- Schneider Children's Medical Center of Israel, Sackler Faculty of Medicine Tel Aviv University, Petach Tikvah, Israel
| | | | | | | | | | - Deborah Tweddle
- Northern Institute for Cancer Research Newcastle University, Newcastle, United Kingdom
| | | | - Georg Mann
- St. Anna Children´s Hospital, Vienna, Austria
| | - Alem Gabriel
- Northern Institute for Cancer Research Newcastle University, Newcastle, United Kingdom
| | - Marta Jeison
- Schneider Children’s Medical Center, Petah Tikva, Israel
| | | | | | - Dominique Valteau Couanet
- Children and Adolescent Oncology Department, Gustave Roussy, Paris-Sud University, Villejuif, France
| | - Inge M Ambros
- Children’s Cancer Research Institute, Vienna, Austria
| | - Peter F Ambros
- Children's Cancer Research Institute, CCRI St. Anna Kinderkrebsforschung, Vienna, Austria
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22
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Blanchet CE, Schroer MA, Gruzinov AY, Spilotros A, Graewert MA, Franke D, Hajizadeh NR, Jeffries CM, Fiedler S, Svergun DI. Status of the EMBL BioSAXS beamline P12 at PETRA III. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317088878] [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: 11/11/2022] Open
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23
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Gruzinov A, Blanchet CE, Schroer MA, Wieland DCF, Spilotros A, Franke D, Hajizadeh N, Jeffries CM, Fiedler S, Filippov S, Roessle M, Katona G, Svergun DI. High-flux time-resolved experiments and anomalous scattering at EMBL P12 beamline. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317089616] [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: 11/10/2022] Open
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24
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Meixenberger K, Yousef KP, Smith MR, Somogyi S, Fiedler S, Bartmeyer B, Hamouda O, Bannert N, von Kleist M, Kücherer C. Molecular evolution of HIV-1 integrase during the 20 years prior to the first approval of integrase inhibitors. Virol J 2017; 14:223. [PMID: 29137637 PMCID: PMC5686839 DOI: 10.1186/s12985-017-0887-1] [Citation(s) in RCA: 12] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 10/31/2017] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Detailed knowledge of the evolutionary potential of polymorphic sites in a viral protein is important for understanding the development of drug resistance in the presence of an inhibitor. We therefore set out to analyse the molecular evolution of the HIV-1 subtype B integrase at the inter-patient level in Germany during a 20-year period prior to the first introduction of integrase strand inhibitors (INSTIs). METHODS We determined 337 HIV-1 integrase subtype B sequences (amino acids 1-278) from stored plasma samples of antiretroviral treatment-naïve individuals newly diagnosed with HIV-1 between 1986 and 2006. Shannon entropy was calculated to determine the variability at each amino acid position. Time trends in the frequency of amino acid variants were identified by linear regression. Direct coupling analysis was applied to detect covarying sites. RESULTS Twenty-two time trends in the frequency of amino acid variants demonstrated either single amino acid exchanges or variation in the degree of polymorphy. Covariation was observed for 17 amino acid variants with a temporal trend. Some minor INSTI resistance mutations (T124A, V151I, K156 N, T206S, S230 N) and some INSTI-selected mutations (M50I, L101I, T122I, T124 N, T125A, M154I, G193E, V201I) were identified at overall frequencies >5%. Among these, the frequencies of L101I, T122I, and V201I increased over time, whereas the frequency of M154I decreased. Moreover, L101I, T122I, T124A, T125A, M154I, and V201I covaried with non-resistance-associated variants. CONCLUSIONS Time-trending, covarying polymorphisms indicate that long-term evolutionary changes of the HIV-1 integrase involve defined clusters of possibly structurally or functionally associated sites independent of selective pressure through INSTIs at the inter-patient level. Linkage between polymorphic resistance- and non-resistance-associated sites can impact the selection of INSTI resistance mutations in complex ways. Identification of these sites can help in improving genotypic resistance assays, resistance prediction algorithms, and the development of new integrase inhibitors.
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Affiliation(s)
| | - Kaveh Pouran Yousef
- Department of Mathematics and Computer Science, Freie Universität Berlin, Berlin, Germany
| | - Maureen Rebecca Smith
- Department of Mathematics and Computer Science, Freie Universität Berlin, Berlin, Germany
| | - Sybille Somogyi
- HIV and other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Stefan Fiedler
- HIV and other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Barbara Bartmeyer
- HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Osamah Hamouda
- HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Norbert Bannert
- HIV and other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Max von Kleist
- Department of Mathematics and Computer Science, Freie Universität Berlin, Berlin, Germany
| | - Claudia Kücherer
- HIV and other Retroviruses, Robert Koch Institute, Berlin, Germany
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25
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Hopkins JB, Blanchet C, Fiedler S, Gillilan R, Jeffries CM, Mertens H, Svergun D. Outrunning radiation damage in synchrotron biological small-angle X-ray scattering. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s0108767317098117] [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: 11/10/2022] Open
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26
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Bouwmeester S, Verkoeijen PPJL, Aczel B, Barbosa F, Bègue L, Brañas-Garza P, Chmura TGH, Cornelissen G, Døssing FS, Espín AM, Evans AM, Ferreira-Santos F, Fiedler S, Flegr J, Ghaffari M, Glöckner A, Goeschl T, Guo L, Hauser OP, Hernan-Gonzalez R, Herrero A, Horne Z, Houdek P, Johannesson M, Koppel L, Kujal P, Laine T, Lohse J, Martins EC, Mauro C, Mischkowski D, Mukherjee S, Myrseth KOR, Navarro-Martínez D, Neal TMS, Novakova J, Pagà R, Paiva TO, Palfi B, Piovesan M, Rahal RM, Salomon E, Srinivasan N, Srivastava A, Szaszi B, Szollosi A, Thor KØ, Tinghög G, Trueblood JS, Van Bavel JJ, van 't Veer AE, Västfjäll D, Warner M, Wengström E, Wills J, Wollbrant CE. Registered Replication Report: Rand, Greene, and Nowak (2012). Perspect Psychol Sci 2017; 12:527-542. [PMID: 28475467 PMCID: PMC5453400 DOI: 10.1177/1745691617693624] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In an anonymous 4-person economic game, participants contributed more money to a common project (i.e., cooperated) when required to decide quickly than when forced to delay their decision (Rand, Greene & Nowak, 2012), a pattern consistent with the social heuristics hypothesis proposed by Rand and colleagues. The results of studies using time pressure have been mixed, with some replication attempts observing similar patterns (e.g., Rand et al., 2014) and others observing null effects (e.g., Tinghög et al., 2013; Verkoeijen & Bouwmeester, 2014). This Registered Replication Report (RRR) assessed the size and variability of the effect of time pressure on cooperative decisions by combining 21 separate, preregistered replications of the critical conditions from Study 7 of the original article (Rand et al., 2012). The primary planned analysis used data from all participants who were randomly assigned to conditions and who met the protocol inclusion criteria (an intent-to-treat approach that included the 65.9% of participants in the time-pressure condition and 7.5% in the forced-delay condition who did not adhere to the time constraints), and we observed a difference in contributions of -0.37 percentage points compared with an 8.6 percentage point difference calculated from the original data. Analyzing the data as the original article did, including data only for participants who complied with the time constraints, the RRR observed a 10.37 percentage point difference in contributions compared with a 15.31 percentage point difference in the original study. In combination, the results of the intent-to-treat analysis and the compliant-only analysis are consistent with the presence of selection biases and the absence of a causal effect of time pressure on cooperation.
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Cianci M, Bourenkov G, Pompidor G, Karpics I, Kallio J, Bento I, Roessle M, Cipriani F, Fiedler S, Schneider TR. P13, the EMBL macromolecular crystallography beamline at the low-emittance PETRA III ring for high- and low-energy phasing with variable beam focusing. J Synchrotron Radiat 2017; 24:323-332. [PMID: 28009574 PMCID: PMC5182027 DOI: 10.1107/s1600577516016465] [Citation(s) in RCA: 126] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 10/15/2016] [Indexed: 05/26/2023]
Abstract
The macromolecular crystallography P13 beamline is part of the European Molecular Biology Laboratory Integrated Facility for Structural Biology at PETRA III (DESY, Hamburg, Germany) and has been in user operation since mid-2013. P13 is tunable across the energy range from 4 to 17.5 keV to support crystallographic data acquisition exploiting a wide range of elemental absorption edges for experimental phase determination. An adaptive Kirkpatrick-Baez focusing system provides an X-ray beam with a high photon flux and tunable focus size to adapt to diverse experimental situations. Data collections at energies as low as 4 keV (λ = 3.1 Å) are possible due to a beamline design minimizing background and maximizing photon flux particularly at low energy (up to 1011 photons s-1 at 4 keV), a custom calibration of the PILATUS 6M-F detector for use at low energies, and the availability of a helium path. At high energies, the high photon flux (5.4 × 1011 photons s-1 at 17.5 keV) combined with a large area detector mounted on a 2θ arm allows data collection to sub-atomic resolution (0.55 Å). A peak flux of about 8.0 × 1012 photons s-1 is reached at 11 keV. Automated sample mounting is available by means of the robotic sample changer `MARVIN' with a dewar capacity of 160 samples. In close proximity to the beamline, laboratories have been set up for sample preparation and characterization; a laboratory specifically equipped for on-site heavy atom derivatization with a library of more than 150 compounds is available to beamline users.
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Affiliation(s)
- Michele Cianci
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Gleb Bourenkov
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Guillaume Pompidor
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Ivars Karpics
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Johanna Kallio
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Isabel Bento
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Manfred Roessle
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
- Fachhochschule Lübeck, Fachbereich Angewandte Naturwissenschaften, Mönkhofer Weg 239, 23562 Lübeck, Germany
| | - Florent Cipriani
- European Molecular Biology Laboratory, Institut Laue-Langevin, BP 181, 6 rue Jules Horowitz, 38042 Grenoble Cedex 9, France
| | - Stefan Fiedler
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
| | - Thomas R. Schneider
- Hamburg Unit c/o DESY, European Molecular Biology Laboratory (EMBL), Notkestrasse 85, 22603 Hamburg, Germany
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Blanchet CE, Spilotros A, Wieland FDC, Schroer MA, Jeffries CM, Graewert MA, Franke D, Hajizadeh N, Fiedler S, Svergun DI. High-throughput and time-resolved BioSAXS at the P12 beamline of EMBL Hamburg. Acta Crystallogr A Found Adv 2016. [DOI: 10.1107/s2053273316099770] [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: 11/10/2022] Open
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29
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Bento I, Bourenkov G, Cianci M, Pompidor G, Kallio J, Karpics I, Polyakova A, Fiedler S, Schneider TR. P13 and P14, the EMBL beamlines for macromolecular crystallography at PETRAIII. Acta Crystallogr A Found Adv 2016. [DOI: 10.1107/s2053273316097096] [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: 11/11/2022] Open
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Fiedler S, Bender JK, Klare I, Halbedel S, Grohmann E, Szewzyk U, Werner G. Tigecycline resistance in clinical isolates of Enterococcus faecium is mediated by an upregulation of plasmid-encoded tetracycline determinants tet(L) and tet(M). J Antimicrob Chemother 2015; 71:871-81. [PMID: 26682961 DOI: 10.1093/jac/dkv420] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 11/05/2015] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Tigecycline represents one of the last-line therapeutics to combat multidrug-resistant bacterial pathogens, including VRE and MRSA. The German National Reference Centre for Staphylococci and Enterococci has received 73 tigecycline-resistant Enterococcus faecium and Enterococcus faecalis isolates in recent years. The precise mechanism of how enterococci become resistant to tigecycline remains undetermined. This study documents an analysis of the role of efflux pumps in tigecycline resistance in clinical isolates of Enterococcus spp. METHODS Various tigecycline MICs were found for the different isolates analysed. Tigecycline-resistant strains were analysed with respect to genome and transcriptome differences by means of WGS and RT-qPCR. Genes of interest were cloned and expressed in Listeria monocytogenes for verification of their functionality. RESULTS Detailed comparative whole-genome analyses of three isogenic strains, showing different levels of tigecycline resistance, revealed the major facilitator superfamily (MFS) efflux pump TetL and the ribosomal protection protein TetM as possible drug resistance proteins. Subsequent RT-qPCR confirmed up-regulation of the respective genes. A correlation of gene copy number and level of MIC was inferred from further qPCR analyses. Expression of both tet(L) and tet(M) in L. monocytogenes unequivocally demonstrated the potential to increase tigecycline MICs upon acquisition of either locus. CONCLUSIONS Our results indicate that increased expression of two tetracycline resistance determinants, a tet(L)-encoded MFS pump and a tet(M)-encoded ribosomal protection protein, is capable of conferring tigecycline resistance in enterococcal clinical isolates.
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Affiliation(s)
- S Fiedler
- Division of Nosocomial Pathogens and Antibiotic Resistances, National Reference Centre for Staphylococci and Enterococci, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - J K Bender
- Division of Nosocomial Pathogens and Antibiotic Resistances, National Reference Centre for Staphylococci and Enterococci, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - I Klare
- Division of Nosocomial Pathogens and Antibiotic Resistances, National Reference Centre for Staphylococci and Enterococci, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - S Halbedel
- Division of Enteropathogenic Bacteria and Legionella, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
| | - E Grohmann
- Department of Life Sciences and Technology, Beuth University of Applied Sciences, Berlin, Germany Division of Infectious Diseases, University Medical Centre Freiburg, Freiburg, Germany
| | - U Szewzyk
- Environmental Microbiology, Technical University Berlin, Berlin, Germany
| | - G Werner
- Division of Nosocomial Pathogens and Antibiotic Resistances, National Reference Centre for Staphylococci and Enterococci, Department of Infectious Diseases, Robert Koch Institute, Wernigerode Branch, Wernigerode, Germany
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Fiedler S, Berns A, Schwark L, Woelk A, Graw M. The chemistry of death – Adipocere degradation in modern graveyards. Forensic Sci Int 2015; 257:320-328. [DOI: 10.1016/j.forsciint.2015.09.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2015] [Revised: 05/14/2015] [Accepted: 09/12/2015] [Indexed: 10/23/2022]
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Cianci M, Bourenkov G, Kallio J, Pompidor G, Fiedler S, Schneider T. EMBL P13 beamline and derivative laboratory at PETRA III @DESY: phasing of biological macromolecules with softer X-rays and heavy atom derivatives. Acta Crystallogr A Found Adv 2015. [DOI: 10.1107/s2053273315097259] [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: 11/10/2022] Open
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Blanchet CE, Spilotros A, Schwemmer F, Graewert MA, Kikhney A, Jeffries CM, Franke D, Mark D, Zengerle R, Cipriani F, Fiedler S, Roessle M, Svergun DI. Versatile sample environments and automation for biological solution X-ray scattering experiments at the P12 beamline (PETRA III, DESY). J Appl Crystallogr 2015; 48:431-443. [PMID: 25844078 PMCID: PMC4379436 DOI: 10.1107/s160057671500254x] [Citation(s) in RCA: 394] [Impact Index Per Article: 43.8] [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: 12/18/2014] [Accepted: 02/06/2015] [Indexed: 11/12/2023] Open
Abstract
A high-brilliance synchrotron P12 beamline of the EMBL located at the PETRA III storage ring (DESY, Hamburg) is dedicated to biological small-angle X-ray scattering (SAXS) and has been designed and optimized for scattering experiments on macromolecular solutions. Scatterless slits reduce the parasitic scattering, a custom-designed miniature active beamstop ensures accurate data normalization and the photon-counting PILATUS 2M detector enables the background-free detection of weak scattering signals. The high flux and small beam size allow for rapid experiments with exposure time down to 30-50 ms covering the resolution range from about 300 to 0.5 nm. P12 possesses a versatile and flexible sample environment system that caters for the diverse experimental needs required to study macromolecular solutions. These include an in-vacuum capillary mode for standard batch sample analyses with robotic sample delivery and for continuous-flow in-line sample purification and characterization, as well as an in-air capillary time-resolved stopped-flow setup. A novel microfluidic centrifugal mixing device (SAXS disc) is developed for a high-throughput screening mode using sub-microlitre sample volumes. Automation is a key feature of P12; it is controlled by a beamline meta server, which coordinates and schedules experiments from either standard or nonstandard operational setups. The integrated SASFLOW pipeline automatically checks for consistency, and processes and analyses the data, providing near real-time assessments of overall parameters and the generation of low-resolution models within minutes of data collection. These advances, combined with a remote access option, allow for rapid high-throughput analysis, as well as time-resolved and screening experiments for novice and expert biological SAXS users.
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Affiliation(s)
- Clement E. Blanchet
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Alessandro Spilotros
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Frank Schwemmer
- Laboratory for MEMS Applications, IMTEK – Department of Microsystems Engineering, University of Freiburg, Georges-Koegler-Allee 103, Freiburg, 79110, Germany
| | - Melissa A. Graewert
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Alexey Kikhney
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Cy M. Jeffries
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Daniel Franke
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Daniel Mark
- Laboratory for MEMS Applications, IMTEK – Department of Microsystems Engineering, University of Freiburg, Georges-Koegler-Allee 103, Freiburg, 79110, Germany
| | - Roland Zengerle
- Laboratory for MEMS Applications, IMTEK – Department of Microsystems Engineering, University of Freiburg, Georges-Koegler-Allee 103, Freiburg, 79110, Germany
| | - Florent Cipriani
- European Molecular Biology Laboratory, Grenoble Outstation, 6 rue Jules Horowitz, BP 181, Grenoble, 38042, France
| | - Stefan Fiedler
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Manfred Roessle
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
| | - Dmitri I. Svergun
- European Molecular Biology Laboratory, Hamburg Outstation, Notkestrasse 85, Hamburg, 22603, Germany
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Blanchet CE, Hermes C, Svergun DI, Fiedler S. A small and robust active beamstop for scattering experiments on high-brilliance undulator beamlines. J Synchrotron Radiat 2015; 22:461-4. [PMID: 25723949 PMCID: PMC4344362 DOI: 10.1107/s160057751402829x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Accepted: 12/31/2014] [Indexed: 05/24/2023]
Abstract
A small active in-vacuum beamstop has been developed to monitor the flux of intense third-generation synchrotron X-ray beams protecting the downstream detector from the direct beam. Standard active beamstops, where a built-in diode directly absorbs the beam, have limitations in size and lifetime. In the present design, a silicon PIN diode detects the photons back-scattered from a cavity in the beamstop. This approach drastically reduces the radiation dose on the diode and thus increases its lifetime. The beamstop with a diameter of 2 mm has been fabricated to meet the requirements for the P12 bioSAXS beamline of EMBL Hamburg at PETRA III (DESY). The beamstop is in regular user operation at the beamline and displays a good response over the range of energies tested (6-20 keV). Further miniaturization of the diode is easily possible as its size is not limited by the PIN diode used.
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Affiliation(s)
- Clement E. Blanchet
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | - Christoph Hermes
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | - Dmitri I. Svergun
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
| | - Stefan Fiedler
- European Molecular Biology Laboratory, Hamburg Outstation c/o DESY, Notkestrasse 85, 22603 Hamburg, Germany
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Huber P, Yingying L, Roehrich M, Fiedler S, Jenne J, Laun F, Lopez R, Nicolay N. Stepwise Combination of Multi-Pathway Blockade in Addition to Radio-Chemotherapy for Glioblastoma. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2307] [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: 11/17/2022]
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Schneider T, Bourenkov G, Cianci M, Kallio J, Pompidor G, Karpics I, Fiedler S. EMBL beamlines for macromolecular crystallography at PETRA III. Acta Crystallogr A Found Adv 2014. [DOI: 10.1107/s2053273314096545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Since 2012, EMBL Hamburg operates two new beamlines for macromolecular crystallography - P13 and P14 - at PETRA III at DESY (Hamburg, Germany). We exploit the high brilliance and the wide energy range offered by PETRA III to offer a wide range of conditions to fit the experimental conditions to the challenges posed by the samples. P13 provides high photon flux down to 4 keV. With a helium cone and a kappa goniostat, this allows optimized data collection for SAD phasing. Using adaptive mirrors, the focus size (H x V) can be adjusted between 30 x 20 μm^2 and 150 x 100 μm^2 to match the size of the sample. A MARVIN sample changer is in operation for rapid loading and unloading of samples. P14 offers a high photon flux (>10^12 ph/sec at 12 keV into 5 x 5 µm^2). The beamsize can be varied between 1 x 1.5 mm^2 (unfocused) and 5 x 5 µm^2 (fully focused) in less than a minute by moving the KB mirrors in and out of the beam. For small crystals, an MD3 vertical diffractometer with a sphere of confusion smaller than 100 nm offers excellent conditions. Both beamlines are equipped with PILATUS 6M-F detectors for shutter-less data collection and dedicated data processing computers. The beamlines are embedded into the 'Integrated Facility for Structural Biology' offering facilities for sample preparation and characterization, a laboratory specifically equipped for the preparation of heavy atom derivatives, and downstream facilities for data evaluation We will report about the status of the beamlines and describe typical experimental situations (small crystals, large unit cells, serial crystallography, low-energy phasing, small molecules and others).
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Ateschrang A, Fiedler S, Schröter S, Stöckle U, Freude T, Kraus TM. [Duration of inability for work and return to physical work after arthroscopic and open labrum refixation]. Z Orthop Unfall 2014; 152:252-9. [PMID: 24960094 DOI: 10.1055/s-0034-1368407] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND INTRODUCTION The duration of inability for work according to work load and the rate of successful return to work after open and arthroscopic Bankart repair (BR) due to anterior shoulder dislocation has not yet been examined with regard to validated work strain by the REFA classification. Thus, the objective of this study was to determine the duration of inability to work according to work load (REFA criteria) after open and arthroscopic BR as well as the rate of successful return to the original occupation. PATIENTS AND METHODS A total of 93 patients (20 f/73 m) with isolated anterior arthroscopic or open BR due to posttraumatic anterior shoulder instability with no items of hyperlaxity were included in this study. There were 72 patients with arthroscopic and 21 patients with open BR. The postoperative aftercare was standardised and identical. The clinical assessment included the Constant and Murley scores, UCLA shoulder and the Rowe score for shoulder instability. Average follow-up time was 48.3 months (SD ± 23.6 months) with a mean age of 37.1 years (SD ± 14.4 years). The work load was classified according to the German REFA Association. Operation time, duration of inability for work and clinical outcome were analysed and compared according to the operation technique. RESULTS Mean incapacity for work in the group of arthroscopic BR was 3.3 months (SD ± 2.5) and 2.7 months (SD + 2.3 months; p = 0.37) in the group of open BR demonstrating no statistical difference. Both mean time for surgery (p = 0.0003) and in-hospital stay (p = 0.0083) showed significant differences when comparing patients with low work load (REFA 0-1) and higher work load (REFA 2-4) irrespective of the surgical approach. Overall analysis showed an average time of 2.3 months (SD ± 1.5) to return to work for patients with low work load (REFA 0-1) and 4.2 months (SD ± 2.9) for individuals with high work load (REFA 2-4) revealing significant differences (p = 0.0006). The mean inability for work after arthroscopic BR for patients with REFA 0-1 was 2.4 months (SD ± 1.6) and 4.2 months (± 2,9; p = 0.0053) for patients with REFA 2-4 revealing a significant difference. The mean inability for work after open BR for individuals with REFA 0-1 was 1.8 months (± 1.0) and 4.3 months (± 3.3; p = 0.1196) for individuals with REFA 2-4. Two out of 35 patients (5.7 %) with low work load (REFA 0-1) and 10 out of 37 patients (27 %) with high work load (REFA 2-4) could not return to their original occupation after arthroscopic BR. One out of 14 patients (7.1 %) with low work load (REFA 0-1) and 4 out of 7 patients (57.1 %) with high work load (REFA 2-4) could not return to their original occupation after open BR. Comparing these results between arthroscopic and open BR, no significant differences were obtained (chi-square, Pearson). Recurrent shoulder dislocation occurred in the arthroscopic group in 14.3 % (REFA 0-1) and 8.1 % (REFA 2-4) compared to the open procedure group in 0 % (REFA 0-1) and 14 % (REFA 2-4) revealing no statistically significant differences. CONCLUSION This study showed equivalent results after performing open and arthroscopic BR with significantly shorter operation times and in-hospital stays after arthroscopic BR. Higher work loads caused longer inability for work irrespective of the chosen surgical technique. On the basis of these results we recommend arthroscopic BR as the standard primary procedure, while the overall rate of return to work without restrictions of 81.7 % has to be improved in the future.
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Affiliation(s)
- A Ateschrang
- Klinik für Unfall- und Wiederherstellungschirurgie der Eberhard-Karls-Universität Tübingen, BG Unfallklinik Tübingen
| | - S Fiedler
- Klinik für Unfall- und Wiederherstellungschirurgie der Eberhard-Karls-Universität Tübingen, BG Unfallklinik Tübingen
| | - S Schröter
- Klinik für Unfall- und Wiederherstellungschirurgie der Eberhard-Karls-Universität Tübingen, BG Unfallklinik Tübingen
| | - U Stöckle
- Klinik für Unfall- und Wiederherstellungschirurgie der Eberhard-Karls-Universität Tübingen, BG Unfallklinik Tübingen
| | - T Freude
- Klinik für Unfall- und Wiederherstellungschirurgie der Eberhard-Karls-Universität Tübingen, BG Unfallklinik Tübingen
| | - T M Kraus
- Klinik für Unfall- und Wiederherstellungschirurgie der Eberhard-Karls-Universität Tübingen, BG Unfallklinik Tübingen
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Min CH, Lutz P, Fiedler S, Kang BY, Cho BK, Kim HD, Bentmann H, Reinert F. Importance of charge fluctuations for the topological phase in SmB(6). Phys Rev Lett 2014; 112:226402. [PMID: 24949780 DOI: 10.1103/physrevlett.112.226402] [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] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Indexed: 06/03/2023]
Abstract
Typical Kondo insulators (KIs) can have a nontrivial Z_{2} topology because the energy gap opens at the Fermi energy (E_{F}) by a hybridization between odd- and even-parity bands. SmB_{6} deviates from such KI behavior, and it has been unclear how the insulating phase occurs. Here, we demonstrate that charge fluctuations are the origin of the topological insulating phase in SmB_{6}. Our angle-resolved photoemission spectroscopy results reveal that with decreasing temperature the bottom of the d-f hybridized band at the X[over ¯] point, which is predicted to have odd parity and is required for a topological phase, gradually shifts from below to above E_{F}. We conclude that SmB_{6} is a charge-fluctuating topological insulator.
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Affiliation(s)
- Chul-Hee Min
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany and Karlsruhe Institut für Technologie KIT, Gemeinschaftslabor für Nanoanalytik, 76021 Karlsruhe, Germany
| | - P Lutz
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany
| | - S Fiedler
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany and Karlsruhe Institut für Technologie KIT, Gemeinschaftslabor für Nanoanalytik, 76021 Karlsruhe, Germany
| | - B Y Kang
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea
| | - B K Cho
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), Gwangju 500-712, Republic of Korea
| | - H-D Kim
- Center for Correlated Electron Systems, Institute for Basic Science (IBS), Seoul 151-747, Republic of Korea and Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea
| | - H Bentmann
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany and Karlsruhe Institut für Technologie KIT, Gemeinschaftslabor für Nanoanalytik, 76021 Karlsruhe, Germany
| | - F Reinert
- Universität Würzburg, Experimentelle Physik VII, 97074 Würzburg, Germany and Karlsruhe Institut für Technologie KIT, Gemeinschaftslabor für Nanoanalytik, 76021 Karlsruhe, Germany
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Hauser A, Santos-Hoevener C, Meixenberger K, Zimmermann R, Somogyi S, Fiedler S, Hofmann A, Bartmeyer B, Jansen K, Hamouda O, Bannert N, Kuecherer C. Improved testing of recent HIV-1 infections with the BioRad avidity assay compared to the limiting antigen avidity assay and BED Capture enzyme immunoassay: evaluation using reference sample panels from the German Seroconverter Cohort. PLoS One 2014; 9:e98038. [PMID: 24892795 PMCID: PMC4043688 DOI: 10.1371/journal.pone.0098038] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 04/28/2014] [Indexed: 11/30/2022] Open
Abstract
Background The variety and limitations of current laboratory methods for estimating HIV-incidence has driven attempts to improve and standardize the performance of serological ‘Tests for Recent HIV-Infections’ (TRI). Primary and follow-up HIV-1 positive plasma samples from individuals with well-defined dates of infection collected as part of the German Seroconverter Cohort provided specimens highly suitable for use in comparing the performance of three TRIs: the AWARE™ BED™ EIA HIV-1 Incidence test (BED-CEIA), Genetic systems HIV-1/HIV-2 Plus O EIA antibody avidity-based assay (BioRad Avidity) and Sedia™ HIV-1 LAg Avidity EIA (LAg Avidity). Methods The evaluation panel included 180 specimens: 44 from antiretroviral (ARV)-naïve individuals with recently acquired HIV-infection (≤130 days; 25 B and 19 non-B subtypes) and 136 from long-term (>12 months) infected individuals [101 ARV-naïve subtype B, 16 non-B subtypes, 14 ARV-treated individuals, 5 slow progressors (SLP)]. Results For long-term infected, ARV-naïve individuals the false recent rates (FRR) of both the BioRad and LAg Avidity assays were 2% (2/101 for subtype B) and 6% (1/16 for subtype ‘non-B’), while the FRR of the BED-CEIA was 7% (7/101 for subtype B) and 25% (4/16 for subtype ‘non-B’) (all p>0.05). Misclassification of ARV-treated individuals and SLP was rare by LAg (1/14, 0/5) and BioRad Avidity assays (2/14, 1/5) but more frequent by BED-CEIA (5/14, 3/5). Among recently-infected individuals (subtype B), 60% (15/25) were correctly classified by BED-CEIA, 88% (22/25) by BioRad Avidity and significantly fewer by LAg (48%, 12/25) compared to BioRad Avidity (p = 0.005) with a higher true-recency rate among non-B infections for all assays. Conclusions This study using well-characterized specimens demonstrated lower FRRs for both avidity methods than with the BED-CEIA. For recently infected individuals the BioRad Avidity assay was shown to give the most accurate results.
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Affiliation(s)
- Andrea Hauser
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
- * E-mail:
| | - Claudia Santos-Hoevener
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | | | - Ruth Zimmermann
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Sybille Somogyi
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Stefan Fiedler
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Alexandra Hofmann
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Barbara Bartmeyer
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Klaus Jansen
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Osamah Hamouda
- Division of HIV/AIDS, STI and Blood-borne Infections, Robert Koch Institute, Berlin, Germany
| | - Norbert Bannert
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
| | - Claudia Kuecherer
- Division of HIV and Other Retroviruses, Robert Koch Institute, Berlin, Germany
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Fiedler S, Irsig R, Tiggesbäumker J, Schuster C, Merschjann C, Rothe N, Lochbrunner S, Vehse M, Seitz H, Klinkenberg ED, Meiwes-Broer KH. Machining of Biocompatible Ceramics with Femtosecond Laser Pulses. BIOMED ENG-BIOMED TE 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-C/bmt-2013-4093/bmt-2013-4093.xml. [PMID: 24042670 DOI: 10.1515/bmt-2013-4093] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Schneider TR, Bourenkov G, Cianci M, Kallio J, Pompidor G, Fiedler S. EMBL beamlines for macromolecular crystallography at PETRA III. Acta Crystallogr A 2013. [DOI: 10.1107/s0108767313097237] [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] [Indexed: 11/10/2022] Open
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Schneider TR, Bourenkov G, Cianci M, Kallio J, Pompidor G, Fiedler S. EMBL beamlines for macromolecular crystallography at PETRA III. Acta Crystallogr A 2013. [DOI: 10.1107/s0108767313098772] [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: 11/10/2022] Open
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Stachow R, Schiel R, Koch S, Fiedler S, Hermann T, Holl R. Effekte der stationären Rehabilitation von Kindern und Jugendlichen mit Diabetes mellitus Typ 1. Monatsschr Kinderheilkd 2013. [DOI: 10.1007/s00112-013-2909-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fiedler S, Schepanski K, Heinold B, Knippertz P, Tegen I. Climatology of nocturnal low-level jets over North Africa and implications for modeling mineral dust emission. J Geophys Res Atmos 2013; 118:6100-6121. [PMID: 25893154 PMCID: PMC4394707 DOI: 10.1002/jgrd.50394] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 08/30/2012] [Accepted: 04/10/2013] [Indexed: 05/29/2023]
Abstract
[1] This study presents the first climatology for the dust emission amount associated with Nocturnal Low-Level Jets (NLLJs) in North Africa. These wind speed maxima near the top of the nocturnal boundary layer can generate near-surface peak winds due to shear-driven turbulence in the course of the night and the NLLJ breakdown during the following morning. The associated increase in the near-surface wind speed is a driver for mineral dust emission. A new detection algorithm for NLLJs is presented and used for a statistical assessment of NLLJs in 32 years of ERA-Interim reanalysis from the European Centre for Medium-Range Weather Forecasts. NLLJs occur in 29% of the nights in the annual and spatial mean. The NLLJ climatology shows a distinct annual cycle with marked regional differences. Maxima of up to 80% NLLJ frequency are found where low-level baroclinicity and orographic channels cause favorable conditions, e.g., over the Bodélé Depression, Chad, for November-February and along the West Saharan and Mauritanian coast for April-September. Downward mixing of NLLJ momentum to the surface causes 15% of mineral dust emission in the annual and spatial mean and can be associated with up to 60% of the total dust amount in specific areas, e.g., the Bodélé Depression and south of the Hoggar-Tibesti Channel. The sharp diurnal cycle underlines the importance of using wind speed information with high temporal resolution as driving fields for dust emission models. Citation: Fiedler, S., K. Schepanski, B. Heinold, P. Knippertz, and I. Tegen (2013), Climatology of nocturnal low-level jets over North Africa and implications for modeling mineral dust emission, J. Geophys. Res. Atmos., 118, 6100-6121, doi:10.1002/jgrd.50394.
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Affiliation(s)
- S Fiedler
- School of Earth and Environment, University of Leeds Leeds, UK
| | - K Schepanski
- School of Earth and Environment, University of Leeds Leeds, UK ; Now at Leibniz Institute for Tropospheric Research Leipzig, Germany
| | - B Heinold
- School of Earth and Environment, University of Leeds Leeds, UK ; Now at Leibniz Institute for Tropospheric Research Leipzig, Germany
| | - P Knippertz
- School of Earth and Environment, University of Leeds Leeds, UK
| | - I Tegen
- Leibniz Institute for Tropospheric Research Leipzig, Germany
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Heinold B, Knippertz P, Marsham JH, Fiedler S, Dixon NS, Schepanski K, Laurent B, Tegen I. The role of deep convection and nocturnal low-level jets for dust emission in summertime West Africa: Estimates from convection-permitting simulations. J Geophys Res Atmos 2013; 118:4385-4400. [PMID: 25893153 PMCID: PMC4394720 DOI: 10.1002/jgrd.50402] [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] [Subscribe] [Scholar Register] [Received: 10/26/2012] [Revised: 01/30/2013] [Accepted: 04/07/2013] [Indexed: 05/19/2023]
Abstract
[1] Convective cold pools and the breakdown of nocturnal low-level jets (NLLJs) are key meteorological drivers of dust emission over summertime West Africa, the world's largest dust source. This study is the first to quantify their relative contributions and physical interrelations using objective detection algorithms and an off-line dust emission model applied to convection-permitting simulations from the Met Office Unified Model. The study period covers 25 July to 02 September 2006. All estimates may therefore vary on an interannual basis. The main conclusions are as follows: (a) approximately 40% of the dust emissions are from NLLJs, 40% from cold pools, and 20% from unidentified processes (dry convection, land-sea and mountain circulations); (b) more than half of the cold-pool emissions are linked to a newly identified mechanism where aged cold pools form a jet above the nocturnal stable layer; (c) 50% of the dust emissions occur from 1500 to 0200 LT with a minimum around sunrise and after midday, and 60% of the morning-to-noon emissions occur under clear skies, but only 10% of the afternoon-to-nighttime emissions, suggesting large biases in satellite retrievals; (d) considering precipitation and soil moisture effects, cold-pool emissions are reduced by 15%; and (e) models with parameterized convection show substantially less cold-pool emissions but have larger NLLJ contributions. The results are much more sensitive to whether convection is parameterized or explicit than to the choice of the land-surface characterization, which generally is a large source of uncertainty. This study demonstrates the need of realistically representing moist convection and stable nighttime conditions for dust modeling. Citation: Heinold, B., P. Knippertz, J. H. Marsham, S. Fiedler, N. S. Dixon, K. Schepanski, B. Laurent, and I. Tegen (2013), The role of deep convection and nocturnal low-level jets for dust emission in summertime West Africa: Estimates from convection-permitting simulations, J. Geophys. Res. Atmos., 118, 4385-4400, doi:10.1002/jgrd.50402.
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Affiliation(s)
- B Heinold
- School of Earth and Environment, University of LeedsLeeds, UK
- Now at Leibniz Institute for Tropospheric ResearchLeipzig, Germany
- Leibniz Institute for Tropospheric Research, Permoserstr. 15, 04318 Leipzig, Germany. ()
| | - P Knippertz
- School of Earth and Environment, University of LeedsLeeds, UK
| | - JH Marsham
- School of Earth and Environment, University of LeedsLeeds, UK
| | - S Fiedler
- School of Earth and Environment, University of LeedsLeeds, UK
| | - NS Dixon
- School of Earth and Environment, University of LeedsLeeds, UK
| | - K Schepanski
- School of Earth and Environment, University of LeedsLeeds, UK
| | - B Laurent
- Laboratoire Interuniversitaire des Systèmes Atmosphériques, Laboratoire mixte Paris VII-UPEC-CNRSCréteil, France
| | - I Tegen
- Leibniz Institute for Tropospheric ResearchLeipzig, Germany
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Stachow R, Schiel R, Koch S, Fiedler S, Hermann T, Holl RW. Langfristige Effekte der Rehabilitation für Kinder und Jugendliche mit Diabetes mellitus Typ 1. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Xu Z, Fiedler S, Pfister G, Henkelmann B, Mosch C, Völkel W, Fromme H, Schramm KW. Human exposure to fluorotelomer alcohols, perfluorooctane sulfonate and perfluorooctanoate via house dust in Bavaria, Germany. Sci Total Environ 2013; 443:485-490. [PMID: 23220138 DOI: 10.1016/j.scitotenv.2012.10.089] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 10/19/2012] [Accepted: 10/23/2012] [Indexed: 06/01/2023]
Abstract
This study aimed at investigating the presence and distribution of fluorotelomer alcohols (FTOHs), perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in house dust to evaluate human exposure to these compounds via dust ingestion. 31 house dust samples were collected from Bavaria, Germany and analyzed for 4:2, 6:2, 8:2 and 10:2 FTOH, PFOS and PFOA. PFOA was the dominant compound in 79% of the dust samples, followed by PFOS and 8:2 FTOH, while 4:2 FTOH was not detected in any samples. The total concentration of per- and polyfluorinated compounds (PFCs) varied from 32.2 to 2456 ng/g. In addition, the total ingestion rate for PFCs was 0.4-135 ng/d for adults and 5.1-246 ng/d for toddlers, and the highest 8:2 FTOH-based PFOA intake via indoor dust was 0.24 ng/d for adults and 0.44 ng/d for toddlers. Overall, the results of this study demonstrate that dust ingestion is a minor pathway for human exposure to these PFCs; the PFC ingestion via indoor dust is generally low, and only under a worst scenario high intakes have to be expected for toddlers.
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Affiliation(s)
- Zhenlan Xu
- Helmholtz Center Munich - National Research Center for Environmental Health, Molecular EXposomics (MEX), Ingolstädter Landstr.1, Neuherberg 85764, Germany
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Schuster C, Merschjann C, Rothe N, Fiedler S, Irsig R, Meiwes-Broer KH, Vehse M, Seitz H, Senz V, Sternberg K, Lochbrunner S. Machining of Biocompatible Polymers with Shaped Femtosecond Laser Pulses. BIOMED ENG-BIOMED TE 2013; 58 Suppl 1:/j/bmte.2013.58.issue-s1-C/bmt-2013-4085/bmt-2013-4085.xml. [DOI: 10.1515/bmt-2013-4085] [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: 11/15/2022]
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Roehrich M, Fiedler S, Zhang M, Capper D, Trinh T, Jenne J, Schölch S, Huber P. Triple Therapy of Radiation and Combined Integrin and EGFR Blockade in an Orthotopic Glioblastoma Model. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.131] [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: 11/25/2022]
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Schneider TR, Bourenkov G, Cianci M, Roessle M, Svergun D, Cipriani F, Fiedler S. EMBL beamlines for life-science applications at PETRA III. Acta Crystallogr A 2012. [DOI: 10.1107/s0108767312097164] [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: 11/10/2022] Open
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