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Stephan T, Stoldt S, Barbot M, Carney TD, Lange F, Bates M, Bou Dib P, Inamdar K, Shcherbata HR, Meinecke M, Riedel D, Dennerlein S, Rehling P, Jakobs S. Drosophila MIC10b can polymerize into cristae-shaping filaments. Life Sci Alliance 2024; 7:e202302177. [PMID: 38253420 PMCID: PMC10803214 DOI: 10.26508/lsa.202302177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 01/08/2024] [Accepted: 01/09/2024] [Indexed: 01/24/2024] Open
Abstract
Cristae are invaginations of the mitochondrial inner membrane that are crucial for cellular energy metabolism. The formation of cristae requires the presence of a protein complex known as MICOS, which is conserved across eukaryotic species. One of the subunits of this complex, MIC10, is a transmembrane protein that supports cristae formation by oligomerization. In Drosophila melanogaster, three MIC10-like proteins with different tissue-specific expression patterns exist. We demonstrate that CG41128/MINOS1b/DmMIC10b is the major MIC10 orthologue in flies. Its loss destabilizes MICOS, disturbs cristae architecture, and reduces the life span and fertility of flies. We show that DmMIC10b has a unique ability to polymerize into bundles of filaments, which can remodel mitochondrial crista membranes. The formation of these filaments relies on conserved glycine and cysteine residues, and can be suppressed by the co-expression of other Drosophila MICOS proteins. These findings provide new insights into the regulation of MICOS in flies, and suggest potential mechanisms for the maintenance of mitochondrial ultrastructure.
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Affiliation(s)
- Till Stephan
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Stefan Stoldt
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
| | - Mariam Barbot
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Travis D Carney
- Institute of Cell Biochemistry, Hannover Medical School, Hanover, Germany
- Mount Desert Island Biological Laboratory, Bar Harbor, ME, USA
| | - Felix Lange
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Mark Bates
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Department of Optical Nanoscopy, Institute for Nanophotonics, Göttingen, Germany
| | - Peter Bou Dib
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Kaushik Inamdar
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Halyna R Shcherbata
- Institute of Cell Biochemistry, Hannover Medical School, Hanover, Germany
- Mount Desert Island Biological Laboratory, Bar Harbor, ME, USA
| | - Michael Meinecke
- Biochemistry Center (BZH), Heidelberg University, Heidelberg, Germany
| | - Dietmar Riedel
- Laboratory of Electron Microscopy, Max Planck Institute for Multidisciplinary Science, Göttingen, Germany
| | - Sven Dennerlein
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Peter Rehling
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology, Translational Neuroinflammation and Automated Microscopy, Göttingen, Germany
- Max Planck Institute for Multidisciplinary Science, Göttingen, Germany
| | - Stefan Jakobs
- https://ror.org/03av75f26 Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
- Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Göttingen, Göttingen, Germany
- Fraunhofer Institute for Translational Medicine and Pharmacology, Translational Neuroinflammation and Automated Microscopy, Göttingen, Germany
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Hintze A, Lange F, Steyer AM, Anstatt J, Möbius W, Jakobs S, Wichmann C. Developmental changes of the mitochondria in the murine anteroventral cochlear nucleus. iScience 2024; 27:108700. [PMID: 38213623 PMCID: PMC10783593 DOI: 10.1016/j.isci.2023.108700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/22/2023] [Accepted: 12/06/2023] [Indexed: 01/13/2024] Open
Abstract
Mitochondria are key organelles to provide ATP for synaptic transmission. This study aims to unravel the structural adaptation of mitochondria to an increase in presynaptic energy demand and upon the functional impairment of the auditory system. We use the anteroventral cochlear nucleus (AVCN) of wild-type and congenital deaf mice before and after hearing onset as a model system for presynaptic states of lower and higher energy demands. We combine focused ion beam scanning electron microscopy and electron tomography to investigate mitochondrial morphology. We found a larger volume of synaptic boutons and mitochondria after hearing onset with a higher crista membrane density. In deaf animals lacking otoferlin, we observed a shallow increase of mitochondrial volumes toward adulthood in endbulbs, while in wild-type animals mitochondria further enlarged. We propose that in the AVCN, presynaptic mitochondria undergo major structural changes likely to serve higher energy demands upon the onset of hearing and further maturation.
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Affiliation(s)
- Anika Hintze
- Molecular Architecture of Synapses Group, Institute for Auditory Neuroscience, InnerEarLab and Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Felix Lange
- Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Anna M. Steyer
- Multiscale Bioimaging Cluster of Excellence (MBExC), University of Göttingen, 37075 Göttingen, Germany
- Electron Microscopy-City Campus, Department of Neurogenetics, Max Planck Institute for Multidisciplinary Sciences, 37075 Göttingen, Germany
| | - Jannis Anstatt
- Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Wiebke Möbius
- Multiscale Bioimaging Cluster of Excellence (MBExC), University of Göttingen, 37075 Göttingen, Germany
- Electron Microscopy-City Campus, Department of Neurogenetics, Max Planck Institute for Multidisciplinary Sciences, 37075 Göttingen, Germany
| | - Stefan Jakobs
- Department of NanoBiophotonics, Max Planck Institute for Multidisciplinary Sciences, 37077 Göttingen, Germany
- Clinic of Neurology, University Medical Center Göttingen, 37075 Göttingen, Germany
- Multiscale Bioimaging Cluster of Excellence (MBExC), University of Göttingen, 37075 Göttingen, Germany
- Translational Neuroinflammation and Automated Microscopy, Fraunhofer Institute for Translational Medicine and Pharmacology ITMP, Göttingen, Germany
| | - Carolin Wichmann
- Molecular Architecture of Synapses Group, Institute for Auditory Neuroscience, InnerEarLab and Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, 37075 Göttingen, Germany
- Multiscale Bioimaging Cluster of Excellence (MBExC), University of Göttingen, 37075 Göttingen, Germany
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Dulfer SE, Gadella MC, Sahinovic MM, Lange F, Absalom AR, Groen RJM, Szelényi A, Drost G. Reply to "Review on MEP monitoring disregarding D-wave references". Clin Neurophysiol 2023; 152:114. [PMID: 37302916 DOI: 10.1016/j.clinph.2023.05.003] [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] [Received: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 06/13/2023]
Affiliation(s)
- S E Dulfer
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - M C Gadella
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M M Sahinovic
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F Lange
- Department of Neurosurgery, Hospital of the Ludwig Maximilians University Munich (LMU), Munich, Germany
| | - A R Absalom
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R J M Groen
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - A Szelényi
- Department of Neurosurgery, Hospital of the Ludwig Maximilians University Munich (LMU), Munich, Germany
| | - G Drost
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands; Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Dulfer SE, Gadella MC, Sahinovic MM, Lange F, Absalom AR, Groen RJM, Szelényi A, Drost G. Stimulation parameters for motor evoked potentials during intraoperative spinal cord monitoring. A systematic review. Clin Neurophysiol 2023; 149:70-80. [PMID: 36924672 DOI: 10.1016/j.clinph.2023.02.170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 01/10/2023] [Accepted: 02/08/2023] [Indexed: 03/06/2023]
Abstract
OBJECTIVE The aim of this systematic review was to find the optimal stimulation parameters for muscle recorded transcranial electrical stimulation motor evoked potential (mTc-MEP) and D-wave monitoring during spinal cord monitoring. METHODS A PRISMA systematic search in Medline and EMBASE and a QUADAS-2 quality evaluation was performed to identify studies that compared stimulation parameters consisting of stimulation location, number of pulses, pulse duration, interstimulus interval, double train (DTS) or recurrent train stimulation (RTS) and intertrain interval (ITI) for performing mTc-MEP and D-wave monitoring. Only studies that used total intravenous anaesthesia (TIVA) were included. RESULTS Ten studies that compared stimulation parameters for performing mTc-MEP monitoring (stimulation location n = 4, number of pulses n = 2, pulse duration n = 1, interstimulus interval n = 4, DTS n = 1, RTS n = 2, ITI n = 2) were included. No studies compared stimulation parameters (stimulation location and pulse duration) for performing D-wave monitoring. CONCLUSIONS Few studies examined the optimal stimulation parameters for monitoring mTc-MEPs and no studies were included for D-wave monitoring. There is a need for prospective research to investigate the optimal stimulation parameters for mTc-MEP with the use of TIVA and D-wave monitoring. SIGNIFICANCE For mTc-MEP monitoring, a table is provided in which the recommended stimulation parameters are stated.
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Affiliation(s)
- S E Dulfer
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands.
| | - M C Gadella
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
| | - M M Sahinovic
- Department of Anaesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
| | - F Lange
- Department of Neurology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
| | - A R Absalom
- Department of Anaesthesiology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
| | - R J M Groen
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
| | - A Szelényi
- Department of Neurosurgery, Hospital of the Ludwig Maximilians University Munich (LMU), Munich, Germany
| | - G Drost
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands; Department of Neurology, University Medical Centre Groningen, University of Groningen, Groningen, the Netherlands
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Dulfer SE, Lange F, Sahinovic MM, Wapstra FH, Absalom AR, Faber C, Groen RJM, Drost G. Feasibility and optimal choice of stimulation parameters for supramaximal stimulation of motor evoked potentials. J Clin Monit Comput 2023; 37:783-793. [PMID: 36635569 PMCID: PMC10175431 DOI: 10.1007/s10877-022-00972-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/08/2022] [Accepted: 12/31/2022] [Indexed: 01/14/2023]
Abstract
PURPOSE The aim was to investigate the feasibility and optimal stimulation parameters for supramaximal stimulation of muscle recorded transcranial electrical stimulation motor evoked potentials (mTc-MEP). METHODS Forty-seven consecutive patients that underwent scoliosis surgery were included. First, the feasibility of supramaximal stimulation was assessed for two settings (setting 1: pulse duration 0.075ms, interstimulus interval (ISI) 1.5ms; setting 2: pulse duration 0.300ms, ISI 3ms). Thereafter, three mTc-MEP parameters were considered for both settings; (1) elicitability, (2) amplitude, and (3) if supramaximal stimulation was achieved with ≥ 20 V below maximum output. Finally, ISIs (1ms-4ms) were optimized for setting 1. RESULTS Nine patients (19.15%) were excluded. Of the remaining patients, supramaximal stimulation was achieved in all patients for setting 1, and in 26 (68.42%) for setting 2. In one patient, mTc-MEPs were elicitable in more muscles for setting (1) Amplitudes were not significantly different. Stimulation voltage could be increased ≥ 20 V in all 38 patients for setting 1 and in 10 (38.46%) for setting (2) Optimal ISI's differed widely. CONCLUSION We recommend using setting 1 when monitoring mTc-MEPs with supramaximal stimulation, after which an individualized ISI optimization can be performed. Moreover, when using supramaximal stimulation, short ISI's (i.e. 1ms or 1.5ms) can be the optimal ISI for obtaining the highest mTc-MEP amplitude.
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Affiliation(s)
- S E Dulfer
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands. .,, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
| | - F Lange
- Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - M M Sahinovic
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F H Wapstra
- Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - A R Absalom
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - C Faber
- Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R J M Groen
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - G Drost
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Lange F, Verma V, Harvey-Jones K, Mitra S, Tachtsidis I. Neonatal Brain Temperature Monitoring Based on Broadband Near-Infrared Spectroscopy. Adv Exp Med Biol 2023; 1438:167-172. [PMID: 37845456 DOI: 10.1007/978-3-031-42003-0_26] [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] [Subscribe] [Scholar Register] [Indexed: 10/18/2023]
Abstract
We present here the initial development of a novel algorithm based on broadband near-infrared spectroscopy (bNIRS) data to estimate the changes in brain temperature (BT) in neonates. We first explored the validity of the methodology on a simple numerical phantom and reported good agreements between the theoretical and retrieved values of BT and hemodynamic parameters changes, which are the parameters usually targeted by bNIRS. However, we noted an underestimation of the absolute values of temperature and haemoglobins' concentration changes when large variations of tissue saturation were induced, probably due to a crosstalk between the species in this specific case. We then tested this methodology on data acquired on 2 piglets during a protocol that induces seizures. We showed that despite a decrease in rectal temperature (RT) over time (-0.1048 °C 1.5 h after seizure induction, 95% CI: -0.1035 to -0.1061 °C), BT was raising (0.3122 °C 1.5 h after seizure induction, 95% CI: 0.3207 to 0.3237 °C). We also noted that the piglet displaying the largest decrease in RT also displays the highest increase in BT, which could be a marker of the severity of the seizure induced brain injury. These initial results are encouraging and show that having access to the changes in BT non-invasively could help to better understand the impact of BT on injury severity and to improve the current cooling methodologies in the neonatal neurocritical care following neonatal encephalopathy.
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Affiliation(s)
- F Lange
- Department of Medical Physics and Biomedical Engineering, University College London, London, UK.
| | - V Verma
- Institute for Women's Health, University College London, London, UK
| | - K Harvey-Jones
- Institute for Women's Health, University College London, London, UK
| | - S Mitra
- Institute for Women's Health, University College London, London, UK
| | - I Tachtsidis
- Department of Medical Physics and Biomedical Engineering, University College London, London, UK
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Klein I, Boenert J, Lange F, Christensen B, Wassermann MK, Wiesen MHJ, Olschewski DN, Rabenstein M, Müller C, Lehmann HC, Fink GR, Schroeter M, Rueger MA, Vay SU. Glia from the central and peripheral nervous system are differentially affected by paclitaxel chemotherapy via modulating their neuroinflammatory and neuroregenerative properties. Front Pharmacol 2022; 13:1038285. [PMID: 36408236 PMCID: PMC9666700 DOI: 10.3389/fphar.2022.1038285] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Accepted: 10/06/2022] [Indexed: 11/07/2022] Open
Abstract
Glia are critical players in defining synaptic contacts and maintaining neuronal homeostasis. Both astrocytes as glia of the central nervous system (CNS), as well as satellite glial cells (SGC) as glia of the peripheral nervous system (PNS), intimately interact with microglia, especially under pathological conditions when glia regulate degenerative as well as regenerative processes. The chemotherapeutic agent paclitaxel evokes peripheral neuropathy and cognitive deficits; however, the mechanisms underlying these diverse clinical side effects are unclear. We aimed to elucidate the direct effects of paclitaxel on the function of astrocytes, microglia, and SGCs, and their glia-glia and neuronal-glia interactions. After intravenous application, paclitaxel was present in the dorsal root ganglia of the PNS and the CNS of rodents. In vitro, SGC enhanced the expression of pro-inflammatory factors and reduced the expression of neurotrophic factor NT-3 upon exposure to paclitaxel, resulting in predominantly neurotoxic effects. Likewise, paclitaxel induced a switch towards a pro-inflammatory phenotype in microglia, exerting neurotoxicity. In contrast, astrocytes expressed neuroprotective markers and increasingly expressed S100A10 after paclitaxel exposure. Astrocytes, and to a lesser extent SGCs, had regulatory effects on microglia independent of paclitaxel exposure. Data suggest that paclitaxel differentially modulates glia cells regarding their (neuro-) inflammatory and (neuro-) regenerative properties and also affects their interaction. By elucidating those processes, our data contribute to the understanding of the mechanistic pathways of paclitaxel-induced side effects in CNS and PNS.
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Affiliation(s)
- Ines Klein
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Janne Boenert
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Felix Lange
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Britt Christensen
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Meike K. Wassermann
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Martin H. J. Wiesen
- Center of Pharmacology, Therapeutic Drug Monitoring, University Hospital of Cologne, Cologne, Germany
| | - Daniel Navin Olschewski
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Monika Rabenstein
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Carsten Müller
- Center of Pharmacology, Therapeutic Drug Monitoring, University Hospital of Cologne, Cologne, Germany
| | - Helmar C. Lehmann
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
| | - Gereon Rudolf Fink
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
| | - Michael Schroeter
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
| | - Maria Adele Rueger
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
| | - Sabine Ulrike Vay
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Neurology, Cologne, Germany
- *Correspondence: Sabine Ulrike Vay,
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Grillini A, Koens L, Lizaitiene G, Lange F, Cornelissen F, Tijssen M. Measuring saccades in patients with Niemann-Pick type C: A comparison between video-oculography and a novel eye tracking test based on continuous psychophysics. Clin Park Relat Disord 2022; 7:100170. [PMID: 36338825 PMCID: PMC9627094 DOI: 10.1016/j.prdoa.2022.100170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/29/2022] [Accepted: 10/23/2022] [Indexed: 11/19/2022] Open
Abstract
Introduction Vertical supranuclear gaze palsy is a key feature of Niemann-Pick type C (NP-C) and is commonly quantified using video-oculography (VOG). VOG requires sitting still for long times and performing specific tasks, thus it can be challenging or impossible for patients severely affected by movement disorders or cognitive impairment. To overcome this limitation, we measure saccades of NP-C patients using a fast eye tracking test based on continuous psychophysics and compare it to VOG. Methods Saccades of six NP-C patients and six age-matched controls were assessed using VOG and Standardized Oculomotor and Neuro-ophthalmic Disorders Assessment (SONDA). In SONDA, participants continuously track a semi-randomly moving dot on a computer screen while their gaze is being tracked. For both assessments, saccades were quantified using four conventional measures: amplitude, gain, latency, and peak velocity. Furthermore, SONDA's continuous measures were quantified with several novel spatio-temporal properties. Results In the NP-C patients, both methods revealed reduced amplitude, gain, peak velocity, and increased latency of vertical saccades compared to horizontal saccades and compared to healthy controls. Effect sizes obtained with SONDA were overall larger than those for VOG. SONDA's spatio-temporal properties showed similar trends. Conclusion SONDA reveals a deterioration of vertical saccades in NP-C patients that is consistent with VOG. SONDA's measures based on continuous psychophysics are consistent with traditional saccadic parameters and can potentially provide complementary information. SONDA shows larger effect sizes than VOG, suggesting that it provides robust and clinically relevant outcomes with a more intuitive task and shorter testing time.
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Affiliation(s)
- A. Grillini
- Laboratory of Experimental Ophthalmology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - L.H. Koens
- Department of Neurology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands,Expertise Center Movement Disorders Groningen, University Medical Center Groningen, Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - G. Lizaitiene
- Faculty of Medicine, Vilnius University, M. K. Čiurlionio g. 21/27, LT-03101 Vilnius, Lithuania
| | - F. Lange
- Department of Clinical Neurophysiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - F.W. Cornelissen
- Laboratory of Experimental Ophthalmology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands
| | - M.A.J. Tijssen
- Department of Neurology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands,Expertise Center Movement Disorders Groningen, University Medical Center Groningen, Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands,Corresponding author at: Department of Neurology, University Medical Center Groningen, Hanzeplein 1, 9700 RB Groningen, The Netherlands.
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Stejerean‐Todoran I, Zimmermann K, Gibhardt CS, Vultur A, Ickes C, Shannan B, Bonilla del Rio Z, Wölling A, Cappello S, Sung H, Shumanska M, Zhang X, Nanadikar M, Latif MU, Wittek A, Lange F, Waters A, Brafford P, Wilting J, Urlaub H, Katschinski DM, Rehling P, Lenz C, Jakobs S, Ellenrieder V, Roesch A, Schön MP, Herlyn M, Stanisz H, Bogeski I. MCU
controls melanoma progression through a redox‐controlled phenotype switch. EMBO Rep 2022; 23:e54746. [PMID: 36156348 PMCID: PMC9638851 DOI: 10.15252/embr.202254746] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 08/29/2022] [Accepted: 08/29/2022] [Indexed: 01/16/2023] Open
Abstract
Melanoma is the deadliest of skin cancers and has a high tendency to metastasize to distant organs. Calcium and metabolic signals contribute to melanoma invasiveness; however, the underlying molecular details are elusive. The MCU complex is a major route for calcium into the mitochondrial matrix but whether MCU affects melanoma pathobiology was not understood. Here, we show that MCUA expression correlates with melanoma patient survival and is decreased in BRAF kinase inhibitor‐resistant melanomas. Knockdown (KD) of MCUA suppresses melanoma cell growth and stimulates migration and invasion. In melanoma xenografts, MCUA_KD reduces tumor volumes but promotes lung metastases. Proteomic analyses and protein microarrays identify pathways that link MCUA and melanoma cell phenotype and suggest a major role for redox regulation. Antioxidants enhance melanoma cell migration, while prooxidants diminish the MCUA_KD‐induced invasive phenotype. Furthermore, MCUA_KD increases melanoma cell resistance to immunotherapies and ferroptosis. Collectively, we demonstrate that MCUA controls melanoma aggressive behavior and therapeutic sensitivity. Manipulations of mitochondrial calcium and redox homeostasis, in combination with current therapies, should be considered in treating advanced melanoma.
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Affiliation(s)
- Ioana Stejerean‐Todoran
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | | | - Christine S Gibhardt
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Adina Vultur
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
- The Wistar Institute Melanoma Research Center Philadelphia PA USA
| | - Christian Ickes
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Batool Shannan
- The Wistar Institute Melanoma Research Center Philadelphia PA USA
- Department of Dermatology, University Hospital Essen, West German Cancer Center University Duisburg‐Essen and the German Cancer Consortium (DKTK)
| | - Zuriñe Bonilla del Rio
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Anna Wölling
- Department of Dermatology, Venereology and Allergology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Sabrina Cappello
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Hsu‐Min Sung
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Magdalena Shumanska
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Xin Zhang
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Maithily Nanadikar
- Department of Cardiovascular Physiology, University Medical Center Göttingen Georg‐August‐University Göttingen Germany
| | - Muhammad U Latif
- Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology University Medical Center Göttingen Gottingen Germany
| | - Anna Wittek
- Department of NanoBiophotonics Max Planck Institute for Multidisciplinary Sciences Göttingen Germany
- Clinic of Neurology University Medical Center Göttingen Göttingen Germany
| | - Felix Lange
- Department of NanoBiophotonics Max Planck Institute for Multidisciplinary Sciences Göttingen Germany
- Clinic of Neurology University Medical Center Göttingen Göttingen Germany
| | - Andrea Waters
- The Wistar Institute Melanoma Research Center Philadelphia PA USA
| | | | - Jörg Wilting
- Department of Anatomy and Cell Biology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Henning Urlaub
- Bioanalytical Mass Spectrometry Group Max Planck Institute for Multidisciplinary Sciences Göttingen Germany
- Bioanalytics, Institute of Clinical Chemistry University Medical Center Göttingen Germany
| | - Dörthe M Katschinski
- Department of Cardiovascular Physiology, University Medical Center Göttingen Georg‐August‐University Göttingen Germany
| | - Peter Rehling
- Department of Cellular Biochemistry University Medical Center Göttingen, GZMB Göttingen Germany
| | - Christof Lenz
- Bioanalytical Mass Spectrometry Group Max Planck Institute for Multidisciplinary Sciences Göttingen Germany
- Bioanalytics, Institute of Clinical Chemistry University Medical Center Göttingen Germany
| | - Stefan Jakobs
- Department of NanoBiophotonics Max Planck Institute for Multidisciplinary Sciences Göttingen Germany
- Clinic of Neurology University Medical Center Göttingen Göttingen Germany
| | - Volker Ellenrieder
- Department of Gastroenterology, Gastrointestinal Oncology and Endocrinology University Medical Center Göttingen Gottingen Germany
| | - Alexander Roesch
- Department of Dermatology, University Hospital Essen, West German Cancer Center University Duisburg‐Essen and the German Cancer Consortium (DKTK)
| | - Michael P Schön
- Department of Dermatology, Venereology and Allergology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Meenhard Herlyn
- The Wistar Institute Melanoma Research Center Philadelphia PA USA
| | - Hedwig Stanisz
- Department of Dermatology, Venereology and Allergology, University Medical Center Georg‐August‐University Göttingen Germany
| | - Ivan Bogeski
- Molecular Physiology, Department of Cardiovascular Physiology, University Medical Center Georg‐August‐University Göttingen Germany
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Richter J, Lange F, Solle D, Beutel S. First Steps of Digitalization and Optimization of a CHO Cell Culture Process for Recombinant mAb Production. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255026] [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: 11/10/2022]
Affiliation(s)
- J. Richter
- Leibniz University Hanover Institute of Technical Chemistry Callinstr. 5 30167 Hannover Germany
| | - F. Lange
- Leibniz University Hanover Institute of Technical Chemistry Callinstr. 5 30167 Hannover Germany
| | - D. Solle
- Leibniz University Hanover Institute of Technical Chemistry Callinstr. 5 30167 Hannover Germany
| | - S. Beutel
- Leibniz University Hanover Institute of Technical Chemistry Callinstr. 5 30167 Hannover Germany
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11
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Habich T, Lange F, Rehfeld J, Beutel S. Digital Integration of Laboratory Devices Using SiLA 2: Continuous Protein Purification Using Periodic Counter‐Current Chromatography. CHEM-ING-TECH 2022. [DOI: 10.1002/cite.202255188] [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: 11/10/2022]
Affiliation(s)
- T. Habich
- Leibniz University Hannover Institute for Technical Chemistry Callinstr. 5 30167 Hannover Germany
| | - F. Lange
- Leibniz University Hannover Institute for Technical Chemistry Callinstr. 5 30167 Hannover Germany
| | - J. S. Rehfeld
- Leibniz University Hannover Institute for Technical Chemistry Callinstr. 5 30167 Hannover Germany
| | - S. Beutel
- Leibniz University Hannover Institute for Technical Chemistry Callinstr. 5 30167 Hannover Germany
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12
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Brunger AF, Berends M, Bijzet J, Van der Zwaag P, Kroesen BJ, Teunissen C, In ‘t Veld S, Drost G, Lange F, Gans R, Hazenberg B, Nienhuis HLA. POS1395 NEUROFILAMENT LIGHT CHAIN, AN EARLY BIOMARKER FOR POLYNEUROPATHY IN HEREDITARY ATTR AMYLOIDOSIS. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BackgroundSerum neurofilament light chain (sNfL) is a sensitive marker for polyneuropathy (PNP) in hereditary transthyretin-related (ATTRv) amyloidosis patients and correlates with the severity of polyneuropathy [1-4]. We hypothesized that sNfL may diagnose neuronal damage in patients with hATTR amyloidosis before the onset of symptoms and before PNP can be detected by electromyography (EMG) examination.ObjectivesTo establish the course of sNfL in three different groups: 1. persistently asymptomatic variant carriers (with and without detected amyloid), 2. ATTRv amyloidosis patients with PNP on treatment, 3. variant carriers who develop PNP.MethodssNfL levels were assessed longitudinally in asymptomatic variant carriers (with and without detectable amyloid), ATTRv amyloidosis patients with PNP on treatment (either a transthyretin (TTR) stabilizer or patisiran, an RNA interference therapeutic), and variant carriers who developed PNP. PNP was established by EMG examination. The single-molecule array (Simoa) assay was used to assess sNfL levels.ResultssNfL levels significantly increased over 1 year in 20 persistently asymptomatic carriers (p<0.001), with the strongest increase in variant carriers (n=8) with detectable amyloid in the subcutaneous abdominal fat tissue. In 21 symptomatic ATTRv amyloidosis patient with PNP on treatment with a TTR stabilizer, sNfL levels remained stable over 1 year. In 24 patients treated with patisiran, sNfL levels significantly decreased after 1 year of treatment (p=0.01). In 8 out of 9 variant carriers who developed PNP a rise in the sNfL level could be observed before the onset of symptoms and establishment of PNP by EMG examination (Figure 1).Figure 1.ConclusionsNfL is a marker for early neuronal damage since a rise in sNfL level occurs before abnormalities can be detected by EMG examination. Our data support the use of sNfL in monitoring disease progression, screening asymptomatic variant carriers and monitoring of treatment effect.References[1]Louwsma et al. Amyloid 2021;28(1):50-55[2]Maia et al. Amyloid 2020;27(2):97-102[3]Kapoor et al. J Perpher nerv syst 2019;24:314-319[4]Ticau et al. Neurology 2021;96:e412-e422Disclosure of InterestsAnne Floor Brunger: None declared, Milou Berends: None declared, Johan Bijzet: None declared, Paul van der Zwaag: None declared, Bart-Jan Kroesen: None declared, Charlotte Teunissen: None declared, Sjors in ‘t Veld: None declared, Gea Drost: None declared, Fiete Lange: None declared, Reinold Gans: None declared, Bouke Hazenberg Consultant of: Alnylam and Pfizer, Hans L.A. Nienhuis Consultant of: Alnylam and Pfizer
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Pfeiffer M, Schreglmann S, Roothans J, Lange F, Eldebakey H, Reich M. P 23 The overlap of lesions placed by MRIgFUS with the cerebellothalamic tract does not adequately explain symptom control in ET. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2022.01.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Hensel L, Lange F, Tscherpel C, Viswanathan S, Freytag J, Volz L, Eickhoff S, Fink G, Grefkes C. FV 25 Interhemispheric connectivity of frontoparietal motor regions aids grasping performance after stroke. Clin Neurophysiol 2022. [DOI: 10.1016/j.clinph.2022.01.031] [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: 11/28/2022]
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15
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Buot A, Brownhill K, Lange F. Upper Trapezius Muscle Tonicity, Assessed by Palpation, Relates to Change in Tissue Oxygenation and Structure as Measured by Time-Domain Near Infrared Spectroscopy. Advances in Experimental Medicine and Biology 2022; 1395:417-421. [PMID: 36527672 DOI: 10.1007/978-3-031-14190-4_68] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Palpation is a diagnostic tool widely used by manual therapists despite its disputed reliability and validity. Previous studies have usually focused on the detection of myofascial trigger points (MTrPs), i.e., the points within muscles thought to have undergone molecular composition, oxygenation and structural changes, altering their tonicity. Time-domain near-infrared spectroscopy (TD-NIRS) could provide new insights into soft tissue oxygenation and structure, in order to objectively assess the validity and reliability of palpation. This pilot study aims at (1) assessing the ability of TD-NIRS to detect a difference between palpably normal and hypertonic upper trapezius (UT) muscles, and (2) to estimate the reproducibility of the TD-NIRS measurement on UT muscles. TD-NIRS measurements were performed on 4 points of the UT muscles in 18 healthy participants (10F, mean age: 27.6 years), after a physical examination by a student osteopath to locate these points and identify the most and least hypertonic. From TD-NIRS, the most hypertonic points had a higher concentration in deoxy- ([HHb]) (0.887 ± 0.253 μM, p < 0.001) and total haemoglobin ([HbT]) (1.447 ± 0.772 μM, p < 0.001), a lower tissue oxygen saturation (StO2) (-0.575 ± 0.286%, p < 0.001), and a greater scattering amplitude factor (AF) (0.2238 ± 0.1343 cm-1, p = 0.001) than the least hypertonic points. Moreover, the intraclass correlation coefficient one-way random-effects model (ICC (1,1)) calculated for each TD-NIRS parameter and for each point revealed an excellent reliability of the measurement (Mean ± SD, 0.9253 ± 0.0678). These initial results, showing that changes in TD-NIRS parameters correlate with changes in muscle tonicity as assessed by palpation, are encouraging and show that TD-NIRS could help to further assess the validity of palpation as a diagnostic tool in manual therapy.
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von Stillfried S, Freeborn B, Windeck S, Boor P, Böcker J, Schmidt J, Tholen P, Röhrig R, Majeed R, Wienströer J, Bremer J, Weis J, Knüchel R, Breitbach A, Bülow RD, Cacchi C, Wucherpfennig S, Märkl B, Claus R, Dhillon C, Schaller T, Sipos E, Spring O, Braun G, Römmele C, Kling E, Kröncke T, Wittmann M, Hirschbühl K, Heppner FL, Meinhardt J, Radbruch H, Streit S, Horst D, Elezkurtaj S, Quaas A, Göbel H, Friemann J, Hansen T, Titze U, Lorenzen J, Reuter T, Woloszyn J, Baretton G, Hilsenbeck J, Meinhardt M, Pablik J, Sommer L, Holotiuk O, Meinel M, Esposito I, Crudele G, Seidl M, Mahlke N, Hartmann A, Haller F, Eichhorn P, Lange F, Amann KU, Coras R, Ingenwerth M, Rawitzer J, Schmid KW, Theegarten D, Gradhand E, Smith K, Wild P, Birngruber CG, Schilling O, Werner M, Acker T, Gattenlöhner S, Franz J, Metz I, Stadelmann C, Stork L, Thomas C, Zechel S, Ströbel P, Fathke C, Harder A, Wickenhauser C, Glatzel M, Matschke J, Krasemann S, Dietz E, Edler C, Fitzek A, Fröb D, Heinemann A, Heinrich F, Klein A, Kniep I, Lohner L, Möbius D, Ondruschka B, Püschel K, Schädler J, Schröder AS, Sperhake JP, Aepfelbacher M, Fischer N, Lütgehetmann M, Pfefferle S, Jonigk D, Werlein C, Domke LM, Hartmann L, Klein I, Schirmacher P, Schwab C, Röcken C, Langer D, Roth W, Strobl S, Rudelius M, Delbridge C, Kasajima A, Kuhn PH, Slotta-Huspenina J, Weichert W, Weirich G, Stock K, Barth P, Schnepper A, Wardelmann E, Evert K, Evert M, Büttner A, Manhart J, Nigbur S, Bösmüller H, Fend F, Granai M, Klingel K, Warm V, Steinestel K, Umathum VG, Rosenwald A, Vogt N, Kurz F. [Update on collaborative autopsy-based research in German pathology, neuropathology, and forensic medicine]. Pathologie (Heidelb) 2022; 43:101-105. [PMID: 36114379 PMCID: PMC9483541 DOI: 10.1007/s00292-022-01117-w] [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] [Accepted: 08/30/2022] [Indexed: 01/02/2023]
Abstract
BACKGROUND Autopsies are a valuable tool for understanding disease, including COVID-19. MATERIALS AND METHODS The German Registry of COVID-19 Autopsies (DeRegCOVID), established in April 2020, serves as the electronic backbone of the National Autopsy Network (NATON), launched in early 2022 following DEFEAT PANDEMIcs. RESULTS The NATON consortium's interconnected, collaborative autopsy research is enabled by an unprecedented collaboration of 138 individuals at more than 35 German university and non-university autopsy centers through which pathology, neuropathology, and forensic medicine autopsy data including data on biomaterials are collected in DeRegCOVID and tissue-based research and methods development are conducted. More than 145 publications have now emerged from participating autopsy centers, highlighting various basic science and clinical aspects of COVID-19, such as thromboembolic events, organ tropism, SARS-CoV‑2 detection methods, and infectivity of SARS-CoV-2 at autopsy. CONCLUSIONS Participating centers have demonstrated the high value of autopsy and autopsy-derived data and biomaterials to modern medicine. The planned long-term continuation and further development of the registry and network, as well as the open and participatory design, will allow the involvement of all interested partners.
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Affiliation(s)
- Saskia von Stillfried
- Institut für Pathologie, Universitätsklinik RWTH Aachen, Pauwelsstr. 30, 52074 Aachen, Deutschland
| | - Benita Freeborn
- Institut für Pathologie, Universitätsklinik RWTH Aachen, Pauwelsstr. 30, 52074 Aachen, Deutschland
| | - Svenja Windeck
- Institut für Pathologie, Universitätsklinik RWTH Aachen, Pauwelsstr. 30, 52074 Aachen, Deutschland
| | - Peter Boor
- Institut für Pathologie, Universitätsklinik RWTH Aachen, Pauwelsstr. 30, 52074 Aachen, Deutschland ,Medizinische Klinik II (Nephrologie und Immunologie), Universitätsklinik RWTH Aachen, Pauwelsstr. 30, 52074 Aachen, Deutschland ,Elektronenmikroskopische Einrichtung, Universitätsklinik RWTH Aachen, Pauwelsstr. 30, 52074 Aachen, Deutschland
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Vay SU, Olschewski DN, Petereit H, Lange F, Nazarzadeh N, Gross E, Rabenstein M, Blaschke SJ, Fink GR, Schroeter M, Rueger MA. Osteopontin regulates proliferation, migration, and survival of astrocytes depending on their activation phenotype. J Neurosci Res 2021; 99:2822-2843. [PMID: 34510519 DOI: 10.1002/jnr.24954] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 07/28/2021] [Accepted: 08/17/2021] [Indexed: 12/31/2022]
Abstract
The glycoprotein osteopontin is highly upregulated in central nervous system (CNS) disorders such as ischemic stroke. Osteopontin regulates cell growth, cell adhesion, homeostasis, migration, and survival of various cell types. Accordingly, osteopontin is considered an essential regulator of regeneration and repair in the ischemic milieu. Astrocytes are the most abundant cells in the CNS and play significant roles in health and disease. Astrocytes are involved in homeostasis, promote neuroprotection, and regulate synaptic plasticity. Upon activation, astrocytes may adopt different phenotypes, termed A1 and A2. The direct effects of osteopontin on astrocytes, especially in distinct activation states, are yet unknown. The current study aimed to elucidate the impact of osteopontin on resting and active astrocytes. We established an inflammatory in vitro model of activated (A1) primary astrocytes derived from neonatal wistar rats by exposure to a distinct combination of proinflammatory cytokines. To model ischemic stroke in vitro, astrocytes were subjected to oxygen and glucose deprivation (OGD) in the presence or absence of osteopontin. Osteopontin modulated the activation phenotype by attenuating A1- and restoring A2-marker expression without compromising the active astrocytes' immunocompetence. Osteopontin promoted the proliferation of active and the migration of resting astrocytes. Following transient OGD, osteopontin mitigated the delayed ongoing death of primary astrocytes, promoting their survival. Data suggest that osteopontin differentially regulates essential functions of resting and active astrocytes and confirm a significant regulatory role of osteopontin in an in vitro ischemia model. Furthermore, the data suggest that osteopontin constitutes a promising target for experimental therapies modulating neuroregeneration and repair.
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Affiliation(s)
- Sabine Ulrike Vay
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Daniel Navin Olschewski
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Helena Petereit
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Felix Lange
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Nilufar Nazarzadeh
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Elena Gross
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Monika Rabenstein
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Stefan Johannes Blaschke
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
| | - Gereon Rudolf Fink
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
| | - Michael Schroeter
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
| | - Maria Adele Rueger
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany.,Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Juelich, Juelich, Germany
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Wullweber A, Strick R, Lange F, Sikic D, Taubert H, Wach S, Wullich B, Bertz S, Weyerer V, Stöhr R, Breyer J, Burger M, Hartmann A, Strissel P, Eckstein M. Bladder tumor subtype commitment occurs in carcinoma in-situ driven by key signaling pathways including ECM remodeling. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)00847-2] [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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19
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Lange F, Agüi-Gonzalez P, Riedel D, Phan NTN, Jakobs S, Rizzoli SO. Correlative fluorescence microscopy, transmission electron microscopy and secondary ion mass spectrometry (CLEM-SIMS) for cellular imaging. PLoS One 2021; 16:e0240768. [PMID: 33970908 PMCID: PMC8109779 DOI: 10.1371/journal.pone.0240768] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 04/13/2021] [Indexed: 11/24/2022] Open
Abstract
Electron microscopy (EM) has been employed for decades to analyze cell structure. To also analyze the positions and functions of specific proteins, one typically relies on immuno-EM or on a correlation with fluorescence microscopy, in the form of correlated light and electron microscopy (CLEM). Nevertheless, neither of these procedures is able to also address the isotopic composition of cells. To solve this, a correlation with secondary ion mass spectrometry (SIMS) would be necessary. SIMS has been correlated in the past to EM or to fluorescence microscopy in biological samples, but not to CLEM. We achieved this here, using a protocol based on transmission EM, conventional epifluorescence microscopy and nanoSIMS. The protocol is easily applied, and enables the use of all three technologies at high performance parameters. We suggest that CLEM-SIMS will provide substantial information that is currently beyond the scope of conventional correlative approaches.
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Affiliation(s)
- Felix Lange
- Research Group Mitochondrial Structure and Dynamics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Clinic for Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Paola Agüi-Gonzalez
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| | - Dietmar Riedel
- Laboratory of Electron Microscopy, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Nhu T. N. Phan
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
| | - Stefan Jakobs
- Research Group Mitochondrial Structure and Dynamics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
- Clinic for Neurology, University Medical Center Göttingen, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- * E-mail: (SJ); (SOR)
| | - Silvio O. Rizzoli
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration, University Medical Center Göttingen, Göttingen, Germany
- * E-mail: (SJ); (SOR)
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Dulfer SE, Sahinovic MM, Lange F, Wapstra FH, Postmus D, Potgieser ARE, Faber C, Groen RJM, Absalom AR, Drost G. The influence of depth of anesthesia and blood pressure on muscle recorded motor evoked potentials in spinal surgery. A prospective observational study protocol. J Clin Monit Comput 2021; 35:967-977. [PMID: 33507473 PMCID: PMC8497310 DOI: 10.1007/s10877-020-00645-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 12/30/2020] [Indexed: 01/27/2023]
Abstract
For high-risk spinal surgeries, intraoperative neurophysiological monitoring (IONM) is used to detect and prevent intraoperative neurological injury. The motor tracts are monitored by recording and analyzing muscle transcranial electrical stimulation motor evoked potentials (mTc-MEPs). A mTc-MEP amplitude decrease of 50–80% is the most common warning criterion for possible neurological injury. However, these warning criteria often result in false positive warnings. False positives may be caused by inadequate depth of anesthesia and blood pressure on mTc-MEP amplitudes. The aim of this paper is to validate the study protocol in which the goal is to investigate the effects of depth of anesthesia (part 1) and blood pressure (part 2) on mTc-MEPs. Per part, 25 patients will be included. In order to investigate the effects of depth of anesthesia, a processed electroencephalogram (pEEG) monitor will be used. At pEEG values of 30, 40 and 50, mTc-MEP measurements will be performed. To examine the effect of blood pressure on mTc-MEPs the mean arterial pressure will be elevated from 60 to 100 mmHg during which mTc-MEP measurements will be performed. We hypothesize that by understanding the effects of depth of anesthesia and blood pressure on mTc-MEPs, the mTc-MEP monitoring can be interpreted more reliably. This may contribute to fewer false positive warnings. By performing this study after induction and prior to incision, this protocol provides a unique opportunity to study the effects of depths of anesthesia and blood pressure on mTc-MEPs alone with as little confounders as possible. Trial registration number NL7772.
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Affiliation(s)
- Sebastiaan E Dulfer
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.
| | - M M Sahinovic
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F Lange
- Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - F H Wapstra
- Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - D Postmus
- Department of Epidemiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - A R E Potgieser
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - C Faber
- Department of Orthopedics, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - R J M Groen
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - A R Absalom
- Department of Anesthesiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - G Drost
- Department of Neurosurgery, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Department of Neurology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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21
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Bonnin EA, Fornasiero EF, Lange F, Turck CW, Rizzoli SO. NanoSIMS observations of mouse retinal cells reveal strict metabolic controls on nitrogen turnover. BMC Mol Cell Biol 2021; 22:5. [PMID: 33430763 PMCID: PMC7798281 DOI: 10.1186/s12860-020-00339-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 12/17/2020] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND Most of the cells of the mammalian retina are terminally differentiated, and do not regenerate once fully developed. This implies that these cells have strict controls over their metabolic processes, including protein turnover. We report the use of metabolic labelling procedures and secondary ion mass spectrometry imaging to examine nitrogen turnover in retinal cells, with a focus on the outer nuclear layer, inner nuclear layer, and outer plexiform layer. RESULTS We find that turnover can be observed in all cells imaged using NanoSIMS. However, the rate of turnover is not constant, but varies between different cellular types and cell regions. In the inner and outer nuclear layers, turnover rate is higher in the cytosol than in the nucleus of each cell. Turnover rates are also higher in the outer plexiform layer. An examination of retinal cells from mice that were isotopically labeled very early in embryonic development shows that proteins produced during this period can be found in all cells and cell regions up to 2 months after birth, even in regions of high turnover. CONCLUSIONS Our results indicate that turnover in retinal cells is a highly regulated process, with strict metabolic controls. We also observe that turnover is several-fold higher in the synaptic layer than in cell layers. Nevertheless, embryonic proteins can still be found in this layer 2 months after birth, suggesting that stable structures persist within the synapses, which remain to be determined.
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Affiliation(s)
- Elisa A Bonnin
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Excellence Cluster Multiscale Bioimaging, 37073, Göttingen, Germany.
- Center for Biostructural Imaging of Neurodegeneration (BIN), 37075, Göttingen, Germany.
| | - Eugenio F Fornasiero
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Excellence Cluster Multiscale Bioimaging, 37073, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration (BIN), 37075, Göttingen, Germany
| | - Felix Lange
- Department of Nanobiophotonics, Max Planck Institute for Biophysical Chemistry, 37077, Göttingen, Germany
- Clinic for Neurology, University Medical Center Göttingen, 37075, Göttingen, Germany
| | - Christoph W Turck
- Proteomics and Biomarkers, Max Planck Institute of Psychiatry, Munich, Germany
| | - Silvio O Rizzoli
- Department of Neuro- and Sensory Physiology, University Medical Center Göttingen, Excellence Cluster Multiscale Bioimaging, 37073, Göttingen, Germany
- Center for Biostructural Imaging of Neurodegeneration (BIN), 37075, Göttingen, Germany
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22
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Weyerer V, Lange F, Wullweber A, Stöhr R, Bertz S, Wach S, Taubert H, Wullich B, Sikic D, Strissel P, Strick R, Hartmann A, Eckstein M. Heterogeneity-analysis of molecular subtypes of muscle-invasive bladder cancer and their precursor lesions in multiregion mapped whole-organ bladders. Urol Oncol 2020. [DOI: 10.1016/j.urolonc.2020.10.057] [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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23
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Ernst OC, Lange F, Uebel D, Teubner T, Boeck T. Analysis of catalyst surface wetting: the early stage of epitaxial germanium nanowire growth. Beilstein J Nanotechnol 2020; 11:1371-1380. [PMID: 32974115 PMCID: PMC7492698 DOI: 10.3762/bjnano.11.121] [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] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 08/24/2020] [Indexed: 06/11/2023]
Abstract
The dewetting process is crucial for several applications in nanotechnology. Even though not all dewetting phenomena are fully understood yet, especially regarding metallic fluids, it is clear that the formation of nanometre-sized particles, droplets, and clusters as well as their movement are strongly linked to their wetting behaviour. For this reason, the thermodynamic stability of thin metal layers (0.1-100 nm) with respect to their free energy is examined here. The decisive factor for the theoretical considerations is the interfacial energy. In order to achieve a better understanding of the interfacial interactions, three different models for estimating the interfacial energy are presented here: (i) fully theoretical, (ii) empirical, and (iii) semi-empirical models. The formation of nanometre-sized gold particles on silicon and silicon oxide substrates is investigated in detail. In addition, the strengths and weaknesses of the three models are elucidated, the different substrates used are compared, and the possibility to further process the obtained particles as nanocatalysts is verified. The importance of a persistent thin communication wetting layer between the particles and its effects on particle size and number is also clarified here. In particular, the intrinsic reduction of the Laplace pressure of the system due to material re-evaporation and Ostwald ripening describes the theoretically predicted and experimentally obtained results. Thus, dewetting phenomena of thin metal layers can be used to manufacture nanostructured devices. From this point of view, the application of gold droplets as catalysts to grow germanium nanowires on different substrates is described.
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Affiliation(s)
- Owen C Ernst
- Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany
| | - Felix Lange
- Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany
| | - David Uebel
- Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany
| | - Thomas Teubner
- Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany
| | - Torsten Boeck
- Leibniz-Institut für Kristallzüchtung, Max-Born-Straße 2, 12489 Berlin, Germany
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24
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Hemmerich J, Osthege M, Reiter A, Wiechert W, Noack S, Oldiges M, Marquard D, Porr M, Lange F, Scheper T, Beutel S, von der Eichen N, Bromig L, Weuster-Botz D. Digitalization in industrial biotechnology – Challenges of miniaturization, automation, and interfaces. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055176] [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: 11/11/2022]
Affiliation(s)
- J. Hemmerich
- Forschungszentrum Jülich Institute of Bio- and Geosciences IBG-1: Biotechnology 52425 Jülich Germany
| | - M. Osthege
- Forschungszentrum Jülich Institute of Bio- and Geosciences IBG-1: Biotechnology 52425 Jülich Germany
| | - A. Reiter
- Forschungszentrum Jülich Institute of Bio- and Geosciences IBG-1: Biotechnology 52425 Jülich Germany
| | - W. Wiechert
- Forschungszentrum Jülich Institute of Bio- and Geosciences IBG-1: Biotechnology 52425 Jülich Germany
| | - S. Noack
- Forschungszentrum Jülich Institute of Bio- and Geosciences IBG-1: Biotechnology 52425 Jülich Germany
| | - M. Oldiges
- Forschungszentrum Jülich Institute of Bio- and Geosciences IBG-1: Biotechnology 52425 Jülich Germany
| | - D. Marquard
- Leibniz-Universität Hannover Institut für technische Chemie Callinstr. 5 30167 Hannover Germany
| | - M. Porr
- Leibniz-Universität Hannover Institut für technische Chemie Callinstr. 5 30167 Hannover Germany
| | - F. Lange
- Leibniz-Universität Hannover Institut für technische Chemie Callinstr. 5 30167 Hannover Germany
| | - T. Scheper
- Leibniz-Universität Hannover Institut für technische Chemie Callinstr. 5 30167 Hannover Germany
| | - S. Beutel
- Leibniz-Universität Hannover Institut für technische Chemie Callinstr. 5 30167 Hannover Germany
| | - N. von der Eichen
- Technische Universität München Lehrstuhl für Bioverfahrenstechnik Boltzmannstr. 15 85748 München Germany
| | - L. Bromig
- Technische Universität München Lehrstuhl für Bioverfahrenstechnik Boltzmannstr. 15 85748 München Germany
| | - D. Weuster-Botz
- Technische Universität München Lehrstuhl für Bioverfahrenstechnik Boltzmannstr. 15 85748 München Germany
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25
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Porr M, Marquard D, Lange F, Austerjost J, McVean K, Herrmann A, Maeß C, Lindner P, Scheper T, Beutel S. Digital image analysis in the lab of the future. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Porr
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
| | - D. Marquard
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
| | - F. Lange
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
| | - J. Austerjost
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
| | - K. McVean
- Noack Laboratorien GmbH Käthe-Paulus-Str. 1 31157 Sarstedt Germany
| | - A. Herrmann
- Noack Laboratorien GmbH Käthe-Paulus-Str. 1 31157 Sarstedt Germany
| | - C. Maeß
- Noack Laboratorien GmbH Käthe-Paulus-Str. 1 31157 Sarstedt Germany
| | - P. Lindner
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
| | - T. Scheper
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
| | - S. Beutel
- Leibniz Universität Hannover Institut für Technische Chemie Callinstr. 5 30167 Hannover Germany
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26
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Stephan T, Brüser C, Deckers M, Steyer AM, Balzarotti F, Barbot M, Behr TS, Heim G, Hübner W, Ilgen P, Lange F, Pacheu-Grau D, Pape JK, Stoldt S, Huser T, Hell SW, Möbius W, Rehling P, Riedel D, Jakobs S. MICOS assembly controls mitochondrial inner membrane remodeling and crista junction redistribution to mediate cristae formation. EMBO J 2020; 39:e104105. [PMID: 32567732 PMCID: PMC7361284 DOI: 10.15252/embj.2019104105] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 05/08/2020] [Accepted: 05/13/2020] [Indexed: 12/26/2022] Open
Abstract
Mitochondrial function is critically dependent on the folding of the mitochondrial inner membrane into cristae; indeed, numerous human diseases are associated with aberrant crista morphologies. With the MICOS complex, OPA1 and the F1 Fo -ATP synthase, key players of cristae biogenesis have been identified, yet their interplay is poorly understood. Harnessing super-resolution light and 3D electron microscopy, we dissect the roles of these proteins in the formation of cristae in human mitochondria. We individually disrupted the genes of all seven MICOS subunits in human cells and re-expressed Mic10 or Mic60 in the respective knockout cell line. We demonstrate that assembly of the MICOS complex triggers remodeling of pre-existing unstructured cristae and de novo formation of crista junctions (CJs) on existing cristae. We show that the Mic60-subcomplex is sufficient for CJ formation, whereas the Mic10-subcomplex controls lamellar cristae biogenesis. OPA1 stabilizes tubular CJs and, along with the F1 Fo -ATP synthase, fine-tunes the positioning of the MICOS complex and CJs. We propose a new model of cristae formation, involving the coordinated remodeling of an unstructured crista precursor into multiple lamellar cristae.
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Affiliation(s)
- Till Stephan
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Christian Brüser
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Markus Deckers
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Anna M Steyer
- Department of Neurogenetics, Electron Microscopy Core Unit, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Francisco Balzarotti
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Mariam Barbot
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Tiana S Behr
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Gudrun Heim
- Laboratory of Electron Microscopy, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Wolfgang Hübner
- Department of Physics, University Bielefeld, Bielefeld, Germany
| | - Peter Ilgen
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Felix Lange
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - David Pacheu-Grau
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany
| | - Jasmin K Pape
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Stefan Stoldt
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany
| | - Thomas Huser
- Department of Physics, University Bielefeld, Bielefeld, Germany
| | - Stefan W Hell
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Goettingen, Germany
| | - Wiebke Möbius
- Department of Neurogenetics, Electron Microscopy Core Unit, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Peter Rehling
- Department of Cellular Biochemistry, University Medical Center Göttingen, Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Goettingen, Germany
| | - Dietmar Riedel
- Laboratory of Electron Microscopy, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Stefan Jakobs
- Department of NanoBiophotonics, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Clinic of Neurology, University Medical Center Göttingen, Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells" (MBExC), University of Goettingen, Goettingen, Germany
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27
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Lange F, Pfennigwerth N, Höfken LM, Gatermann SG, Kaase M. Characterization of mutations in Escherichia coli PBP2 leading to increased carbapenem MICs. J Antimicrob Chemother 2020; 74:571-576. [PMID: 30496417 DOI: 10.1093/jac/dky476] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Revised: 10/17/2018] [Accepted: 10/20/2018] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES To examine the impact on carbapenem resistance of mutations in Escherichia coli PBP2 detected in clinical isolates showing increased MICs of imipenem, but not of meropenem. METHODS The mutations in the PBP2-encoding gene mrdA were introduced into E. coli DH5α using the helper plasmid pTKRED. β-Lactam MICs were determined by broth microdilution and interpreted according to EUCAST. Mutants were screened for secondary mutations by WGS. To detect a possible fitness cost related to these mutations, the generation times of the mutants and E. coli DH5α were measured and their cell morphology was examined. RESULTS The 10 mutation patterns introduced into mrdA increased the MICs of imipenem and doripenem in all cases and of meropenem and mecillinam in some cases, but had no effect on ertapenem resistance. While no significant alteration of the generation time of the mutants could be detected, several mutants showed increased transverse diameters and thus altered cell morphology. CONCLUSIONS Here we describe mutation patterns in PBP2 that contribute to increased MICs of carbapenems for clinical isolates of E. coli. We show that different mutations affect carbapenem MICs differently and that the mutations do not impact generation time, although some mutations affect cell morphology.
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Affiliation(s)
- Felix Lange
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Niels Pfennigwerth
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Lisa-Marie Höfken
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Sören G Gatermann
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Martin Kaase
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, Germany
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28
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Lange F, Ernst OC, Teubner T, Boeck T. Investigation of Au droplet formation and growth of Si xGe 1−x nanowires by molecular beam epitaxy. CrystEngComm 2020. [DOI: 10.1039/d0ce00941e] [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: 11/21/2022]
Abstract
Characteristic Au droplet size distributions on Si(111) were investigated and correlated to the subsequent growth of SixGe1−x nanowires.
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Affiliation(s)
- Felix Lange
- Leibniz-Institut für Kristallzüchtung (IKZ)
- 12489 Berlin
- Germany
| | - Owen C. Ernst
- Leibniz-Institut für Kristallzüchtung (IKZ)
- 12489 Berlin
- Germany
| | - Thomas Teubner
- Leibniz-Institut für Kristallzüchtung (IKZ)
- 12489 Berlin
- Germany
| | - Torsten Boeck
- Leibniz-Institut für Kristallzüchtung (IKZ)
- 12489 Berlin
- Germany
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29
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Drexel SC, Klietz M, Kollewe K, Paracka L, Kutschenko A, Kopp B, Lange F, Wegner F, Dressler D. Caregiver burden and health-related quality of life in idiopathic dystonia patients under botulinum toxin treatment: a cross-sectional study. J Neural Transm (Vienna) 2019; 127:61-70. [PMID: 31802240 PMCID: PMC6942568 DOI: 10.1007/s00702-019-02109-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 11/25/2019] [Indexed: 12/12/2022]
Abstract
Dystonia is a chronic movement disorder that is associated with a reduction in health-related quality of life (HR-QoL) and restriction of activities of daily living. Botulinum neurotoxin (BT) improves disease-specific HR-QoL by reducing abnormal movements, postures, and pain. We examined the burden of the corresponding primary caregiver as a potential important factor for disease management and HR-QoL of dystonia patients under treatment with BT. 114 patients with focal, segmental, or generalized dystonia were recruited, together with 93 corresponding caregivers, whose burden was investigated using the Caregiver Burden Inventory. In addition, all participants were assessed for cognitive impairment, depression, anxiety, alexithymia, and HR-QoL. Only a small proportion of caregivers suffered from caregiver burden. Despite BT therapy, patients’ HR-QoL was decreased compared to the age-matched general German population. Psychological symptoms, notably anxiety, and depression correlated significantly with reduced HR-QoL. Our data imply that caregiver burden emerged to be an issue in subgroups of dystonia patients. Furthermore, HR-QoL of dystonia patients is reduced even under optimized BT treatment in a specialized center.
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Affiliation(s)
- S C Drexel
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - M Klietz
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany.
| | - K Kollewe
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - L Paracka
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - A Kutschenko
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - B Kopp
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - F Lange
- Behavioral Engineering Research Group, KU Leuven, Naamsestraat 69, 3000, Leuven, Belgium
| | - F Wegner
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
| | - D Dressler
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625, Hannover, Germany
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30
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Lange F, Pfennigwerth N, Hartl R, Kerschner H, Achleitner D, Gatermann SG, Kaase M. LMB-1, a novel family of class B3 MBLs from an isolate of Enterobacter cloacae. J Antimicrob Chemother 2019; 73:2331-2335. [PMID: 29897538 DOI: 10.1093/jac/dky215] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Accepted: 05/14/2018] [Indexed: 11/12/2022] Open
Abstract
Objectives To identify and characterize a novel MBL gene conferring carbapenem resistance to an isolate of Enterobacter cloacae from Austria. Methods The novel MBL gene was heterologously expressed in Escherichia coli TOP10 to conduct comparative MIC studies and biochemical assays. Furthermore, WGS was performed using Illumina MiSeq and Oxford Nanopore MinION instruments to analyse the genetic environment of the novel MBL gene. Results The novel MBL showed highest sequence homology to a predicted MBL precursor from the marine bacterium Rheinheimera pacifica and hence belongs to Ambler subgroup B3. The comparative MIC studies and biochemical assays showed activity of the novel enzyme against penicillins, cephalosporins and carbapenems, but not against aztreonam. It was named Linz MBL (LMB-1). The blaLMB-1 gene was shown to be located on a 108 kb plasmid of Inc type IncFIB(K). Of note, a gene adjacent to blaLMB-1 coded for a glycerophosphoryl diester phosphodiesterase that was also previously detected in R. pacifica. Conclusions Homologies of the MBL gene itself and another gene located on the same plasmid to genes detected in marine bacterial species strongly suggest that this novel MBL was transferred to E. cloacae from a marine bacterium. This underlines the importance of natural reservoirs supplying hitherto unknown resistance genes to clinically relevant bacterial species and the importance of ongoing surveillance and research.
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Affiliation(s)
- Felix Lange
- Department of Medical Microbiology, Ruhr University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Niels Pfennigwerth
- Department of Medical Microbiology, Ruhr University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Rainer Hartl
- Institute for Hygiene, Microbiology and Tropical Medicine, National Reference Center for Nosocomial Infections and Antimicrobial Resistance, Ordensklinikum Linz Elisabethinen, Fadingerstraße 1, Linz, Austria
| | - Heidrun Kerschner
- Institute for Hygiene, Microbiology and Tropical Medicine, National Reference Center for Nosocomial Infections and Antimicrobial Resistance, Ordensklinikum Linz Elisabethinen, Fadingerstraße 1, Linz, Austria
| | - Dagmar Achleitner
- Division for Medical Microbiology, University Hospital Salzburg, Müllner Hauptstrasse 48, Salzburg, Austria
| | - Sören G Gatermann
- Department of Medical Microbiology, Ruhr University Bochum, Universitätsstraße 150, Bochum, Germany
| | - Martin Kaase
- Department for Infection Control and Infectious Diseases, University Medical Center Göttingen, Robert-Koch-Str. 40, Göttingen, Germany
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Lange F, Botti A, Almeida J, Júnior JP, Omir F, Ribeiro F, Loureiro D, Vasques M. Maxillomandibular advancement treatment of obstructive sleep apnea syndrome: case report. Int J Oral Maxillofac Surg 2019. [DOI: 10.1016/j.ijom.2019.03.847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Drexel S, Klietz M, Kollewe K, Paracka L, Kutschenko A, Schulte-Sutum A, Kopp B, Lange F, Wegner F, Dressler D. Dystonia treated with botulinum toxin: Quality of life and caregiver burden. Toxicon 2018. [DOI: 10.1016/j.toxicon.2018.11.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Klepel O, Lange F, Utgenannt S. Oxidation of Sulfurous Acid on Carbon Catalysts as a Test Reaction Revisited: Potential and Limitations. Chem Eng Technol 2018. [DOI: 10.1002/ceat.201800227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Olaf Klepel
- Brandenburg University of Technology Cottbus-Senftenberg; Faculty 2 - Environment and Natural Sciences; Universitätsplatz 1 01968 Senftenberg Germany
| | - Felix Lange
- Brandenburg University of Technology Cottbus-Senftenberg; Faculty 2 - Environment and Natural Sciences; Universitätsplatz 1 01968 Senftenberg Germany
| | - Stephan Utgenannt
- Brandenburg University of Technology Cottbus-Senftenberg; Faculty 2 - Environment and Natural Sciences; Universitätsplatz 1 01968 Senftenberg Germany
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Lange F, Hensel L, Tscherpel C, Grefkes C. P28. The functional role of the anterior intraparietal sulcus for recovery of hand function in chronic stroke patients – A combined fMRI-TMS study. Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.04.669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lange F, Porath K, Hartung J, Resch T, Weßlau K, Hörnschemeyer J, Linnebacher M, Schültke E, Kirschstein T, Köhling R. P18. Effekte von Perampanel auf die Gliom-assoziierte Epilepsie. Clin Neurophysiol 2018. [DOI: 10.1016/j.clinph.2018.04.660] [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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Bacles CFE, Bouchard C, Lange F, Manicki A, Tentelier C, Lepais O. Estimating the effective number of breeders from single parr samples for conservation monitoring of wild populations of Atlantic salmon Salmo salar. J Fish Biol 2018; 92:699-726. [PMID: 29377125 DOI: 10.1111/jfb.13537] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [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: 07/31/2017] [Accepted: 12/11/2017] [Indexed: 06/07/2023]
Abstract
This study assesses whether the effective number of breeders (Nb ) can be estimated using a time and cost-effective protocol using genetic sibship reconstruction from a single sample of young-of-the-year (YOY) for the purposes of Atlantic salmon Salmo salar population monitoring. Nb was estimated for 10 consecutive reproductive seasons for S. salar in the River Nivelle, a small population located at the rear-edge of the species distribution area in France, chronically under its conservation limit and subjected to anthropogenic and environmental changes. Subsampling of real and simulated data showed that accurate estimates of Nb can be obtained from YOY genotypes, collected at moderate random sampling intensity, achievable using routine juvenile electrofishing protocols. Spatial bias and time elapsed since spawning were found to affect estimates, which must be accounted for in sampling designs. Nb estimated in autumn for S. salar in the River Nivelle was low and variable across years from 23 (95% C.I. 14-41) to 75 (53-101) and was not statistically correlated with the estimated number of returning adults, but it was positively correlated with the estimated number of YOY at age 9 months. Nb was found to be lower for intermediate levels of redd aggregation, suggesting that the strength of the competition between males to access females affects reproductive success variance depending on redd spatial configuration. Thus, environmental factors such as habitat availability and quality for spawning and YOY development predominate over demographic ones (number of returning adults) in driving long-term population viability for S. salar in the River Nivelle. This study showcases Nb as an integrated parameter, encompassing demographic and ecological information about a reproductive event, relevant to the assessment of both short-term effects of management practices and long-term population conservation status.
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Affiliation(s)
- C F E Bacles
- ECOBIOP, INRA, Université Pau & Pays Adour, 64310, Saint-Pée-Sur-Nivelle, France
| | - C Bouchard
- ECOBIOP, INRA, Université Pau & Pays Adour, 64310, Saint-Pée-Sur-Nivelle, France
| | - F Lange
- ECOBIOP, INRA, Université Pau & Pays Adour, 64310, Saint-Pée-Sur-Nivelle, France
| | - A Manicki
- ECOBIOP, INRA, Université Pau & Pays Adour, 64310, Saint-Pée-Sur-Nivelle, France
| | - C Tentelier
- ECOBIOP, INRA, Université Pau & Pays Adour, 64310, Saint-Pée-Sur-Nivelle, France
| | - O Lepais
- ECOBIOP, INRA, Université Pau & Pays Adour, 64310, Saint-Pée-Sur-Nivelle, France
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Lange F, Pfennigwerth N, Gerigk S, Gohlke F, Oberdorfer K, Purr I, Wohanka N, Roggenkamp A, Gatermann SG, Kaase M. Dissemination of blaOXA-58 in Proteus mirabilis isolates from Germany. J Antimicrob Chemother 2018; 72:1334-1339. [PMID: 28093482 DOI: 10.1093/jac/dkw566] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 12/07/2016] [Indexed: 01/04/2023] Open
Abstract
Objectives Characterization of Proteus mirabilis isolates harbouring bla OXA-58 with emphasis on the genetic environment of this resistance determinant. Methods Strains of P. mirabilis ( n = 37) isolated from different patients were tested for the presence of bla OXA-58 . The genetic context of bla OXA-58 was determined by WGS of two strains and Sanger sequencing. Clonality of the strains was assessed by PFGE. Susceptibility testing was performed by microdilution according to EUCAST. Results Four strains isolated in different geographical regions of Germany were positive for bla OXA-58 , and WGS showed that this resistance gene was harboured on a plasmid. Sanger sequencing confirmed the presence of two nearly identical plasmids, 6219 and 6208 bp in size, in all four strains. Upstream of bla OXA-58 an IS Aba 3-like transposase gene was located. The P. mirabilis strains were not clonally related according to PFGE. MICs of meropenem for three of the strains were only just above the EUCAST breakpoint and the Carba NP test was positive for only two of the strains. Conclusions To our knowledge, this is the first description of bla OXA-58 in the species P. mirabilis . The resistance gene is harboured by almost identical plasmids in strains not clonally related and from different geographical regions. Apart from an IS Aba 3-like transposase gene upstream of bla OXA-58 the genetic context is different from bla OXA-58 harboured on plasmids in the genus Acinetobacter . With MICs of meropenem well below the EUCAST breakpoint or only just above it and equivocal or false negative results from the Carba NP test, bla OXA-58 can be easily overlooked in P. mirabilis .
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Affiliation(s)
- Felix Lange
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, 44801, Germany
| | - Niels Pfennigwerth
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, 44801, Germany
| | - Sonja Gerigk
- Medizinische Laboratorien Düsseldorf, Nordstraße 44, Düsseldorf, 40477, Germany
| | - Frank Gohlke
- Eifeldialyse Mechernich-Euskirchen, Zum Markt 12, Mechernich, 53894, Germany
| | - Klaus Oberdorfer
- MVZ Labor Dr. Limbach & Kollegen GbR, Heidelberg, Im Breitspiel 15, Heidelberg, 69126, Germany
| | - Ingvill Purr
- MVZ synlab Leverkusen GmbH, Paracelsusstraße 13, Leverkusen, 51375, Germany
| | - Nikolaus Wohanka
- MVZ Dr. Engelschalk, Dr. Schubach, Dr. Wiegel und Kollegen, Wörth 15, Passau, 94034, Germany
| | - Andreas Roggenkamp
- MVZ Dr. Engelschalk, Dr. Schubach, Dr. Wiegel und Kollegen, Wörth 15, Passau, 94034, Germany
| | - Sören G Gatermann
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, 44801, Germany
| | - Martin Kaase
- Department of Medical Microbiology, Ruhr-University Bochum, Universitätsstraße 150, Bochum, 44801, Germany
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Bevacqua RJ, Carlson D, Fernandez-Martín R, Gibbons AE, Savy V, Canel NG, Landschoot GV, De La Rosa L, Lange F, Alberio V, Briski O, Gismondi MI, Ferraris S, Fahrenkrug S, Salamone D. 199 Efficient Knock-out of Ovine β-Lactoglobulin (BLG) Gene and Knock-in of Recombinant Human Factor IX (rhFIX) Under BLG Native Regulatory Sequences in Somatic Cells and Zygotes Using TALEN Nuclease. Reprod Fertil Dev 2018. [DOI: 10.1071/rdv30n1ab199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Site-specific genetic engineering is a valuable tool for pharmaceutical research and development of biomedical models. Despite engineered nucleases allow targeted gene edition in a rather simple fashion; few reports are available so far on specific gene knock-in (KI) combined with engineered nucleases in domestic species. Here, we evaluated the possibility of inducing specific KI of cDNAs coding for proteins of pharmaceutical interest under the control of milk native promoter sequences, taking advantage of the TALEN system, both in ovine somatic cells and in zygotes. We designed 2 TALENs, targeting exons 1 and 5 of ovine β-lactoglobulin gene (BLG), respectively, and a homologous recombination vector (pHR), carrying recombinant human factor IX (rhFIX) flanked by homology arms contiguous to the TALEN target sites. In an initial set of experiments, 5 × 105 to 1 × 106 ovine fibroblasts were transfected with 1 μg of each TALEN mRNA, with or without 50 ng μL−1 pHR. The feasibility of inducing knock-out (KO) was confirmed by Cel1 assay. The deletion of the genomic region between TALEN target sites and the occurrence of HR in cell lysates were assessed by PCR. Also, 576 individual colonies were picked up and analyzed by PCR. The deletion of the region between TALEN target sites was achieved with 7.8% efficiency (45/576). The incidence of HR in cells was 0.5% (3/576), as detected by PCR. In order to evaluate the system in zygotes, laparoscopic AI was performed on synchronized and superovulated ewes. Zygotes were recovered 16 h after AI and cytoplasmically injected with (1) 5 ng μL−1 TALEN mix (2.5 ng μL−1 oaBLG T1.1 + 2.5 ng μL−1 oaBLG T5.1) (5TM); (2) 5 ng μL−1 TALEN mix + 25 ng μL−1 pHR-hFIX plasmid (5TM+25pRH); or (3) 15 ng μL−1 TALEN mix (7.5 ng μL−1 oaBLG T1.1 + 7.5 ng μL−1 oaBLG T5.1) + 50 ng μL−1 pHR-hFIX (15TM+50pRH). A non-injected control (NIC) was also included. Embryo analysis was conducted on whole-genome amplified DNA from blastocysts, followed by PCR and sequencing. Non-parametric Fisher test was applied to detect significant differences among treatments. Although blastocyst rates for NIC and 5TM did not statistically differ, 5TM+25pRH and 15TM+50pRH groups resulted in lower blastocysts rates than the NIC [P < 0.05; 13/17 (76%), 6/15 (40%), 4/15 (26%) and 2/14 (14%) for NIC, 5TM, 5TM+25pRH and 15TM+50pRH respectively]. It was possible to detect the PCR product compatible with deletion of the entire region among TALEN target sites in 6/6 blastocysts (100%) from the group 5TM, 3/4 blastocysts (75%) from the group 5TM+25pRH and 2/2 (100%) blastocysts from the group 15TM+50pRH. HR was detected in 1/2 (50%) blastocysts injected with 15TM+50pRH and in 1/4 (25%) blastocysts injected with 5TM+25pRH, by PCR and sequencing of the PCR products. Our results indicate that TALEN combined with homologous recombination constitutes a powerful platform for the production of proteins of pharmaceutical interest under native regulatory sequences in the milk of genetically modified animals.
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Bevacqua RJ, Fernandez-Martin R, Canel NG, Gibbons A, Texeira D, Lange F, Vans Landschoot G, Savy V, Briski O, Hiriart MI, Grueso E, Ivics Z, Taboga O, Kues WA, Ferraris S, Salamone DF. Assessing Tn5 and Sleeping Beauty for transpositional transgenesis by cytoplasmic injection into bovine and ovine zygotes. PLoS One 2017; 12:e0174025. [PMID: 28301581 PMCID: PMC5354444 DOI: 10.1371/journal.pone.0174025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 01/06/2017] [Indexed: 12/27/2022] Open
Abstract
Transgenic domestic animals represent an alternative to bioreactors for large-scale production of biopharmaceuticals and could also provide more accurate biomedical models than rodents. However, their generation remains inefficient. Recently, DNA transposons allowed improved transgenesis efficiencies in mice and pigs. In this work, Tn5 and Sleeping Beauty (SB) transposon systems were evaluated for transgenesis by simple cytoplasmic injection in livestock zygotes. In the case of Tn5, the transposome complex of transposon nucleic acid and Tn5 protein was injected. In the case of SB, the supercoiled plasmids encoding a transposon and the SB transposase were co-injected. In vitro produced bovine zygotes were used to establish the cytoplasmic injection conditions. The in vitro cultured blastocysts were evaluated for reporter gene expression and genotyped. Subsequently, both transposon systems were injected in seasonally available ovine zygotes, employing transposons carrying the recombinant human factor IX driven by the beta-lactoglobulin promoter. The Tn5 approach did not result in transgenic lambs. In contrast, the Sleeping Beauty injection resulted in 2 lambs (29%) carrying the transgene. Both animals exhibited cellular mosaicism of the transgene. The extraembryonic tissues (placenta or umbilical cord) of three additional animals were also transgenic. These results show that transpositional transgenesis by cytoplasmic injection of SB transposon components can be applied for the production of transgenic lambs of pharmaceutical interest.
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Affiliation(s)
- R. J. Bevacqua
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
| | - R. Fernandez-Martin
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
| | - N. G. Canel
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
| | - A. Gibbons
- Experimental Station Bariloche, INTA, Bariloche, Argentina
| | - D. Texeira
- Laboratorio de Fisiologia e Controle da Reprodução, FAVET, UECE, Ceará State, Brasil
| | - F. Lange
- Cloning and Transgenesis Laboratory, Maimónides University, Buenos Aires, Argentina
| | - G. Vans Landschoot
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
- Cloning and Transgenesis Laboratory, Maimónides University, Buenos Aires, Argentina
| | - V. Savy
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
| | - O. Briski
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
| | - M. I. Hiriart
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
| | - E. Grueso
- Paul-Ehrlich-Institute, Langen, Germany
| | - Z. Ivics
- Paul-Ehrlich-Institute, Langen, Germany
| | - O. Taboga
- CICVyA Biotechnology Institute, INTA Castelar, Buenos Aires, Argentina
| | - W. A. Kues
- Friedrich-Loeffler-Institut, Neustadt, Germany
| | - S. Ferraris
- Cloning and Transgenesis Laboratory, Maimónides University, Buenos Aires, Argentina
| | - D. F. Salamone
- Animal Biotechnology Laboratory, Facultad de Agronomia. INPA-CONICET, Buenos Aires University, Buenos Aires, Argentina
- * E-mail:
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Pfennigwerth N, Lange F, Belmar Campos C, Hentschke M, Gatermann SG, Kaase M. Genetic and biochemical characterization of HMB-1, a novel subclass B1 metallo-β-lactamase found in aPseudomonas aeruginosaclinical isolate. J Antimicrob Chemother 2017; 72:1068-1073. [DOI: 10.1093/jac/dkw554] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 11/22/2016] [Indexed: 11/15/2022] Open
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Dulfer SE, Drost G, Lange F, Journee HL, Wapstra FH, Hoving EW. Long-term evaluation of intraoperative neurophysiological monitoring-assisted tethered cord surgery. Childs Nerv Syst 2017; 33:1985-1995. [PMID: 28676974 PMCID: PMC5644688 DOI: 10.1007/s00381-017-3478-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 06/05/2017] [Indexed: 12/01/2022]
Abstract
PURPOSE Patients with tethered spinal cord have been investigated for short-term effects after tethered spinal cord surgery in the past. However, little is known about the long-term effects in this patient group. In this retrospective, longitudinal, observational study, a patient sample of a previous report of 65 patients was reassessed to observe the long-term effects of intraoperative neurophysiological monitoring-assisted tethered cord surgery. METHODS With the use of patient charts and a survey, patients were scored on four domains: (1) neurological deficits, (2) urological deficits, (3) pain symptoms, and (4) orthopedic deficits. Measurements were performed at four moments in time: (1) preoperatively, (2) postoperatively, (3) follow-up 1 (4.6 years), and (4) follow-up 2 (11.2 years). Besides this, a subgroup analysis and a quality of life questionnaire were performed. RESULTS When observing the symptom domains in the long-term, the pain domain appeared to improve most postoperatively after which it remained stable over time. The neurological and urological domains showed a stable, slightly decreasing trend in the long-term follow-up. The orthopedic domain showed a significant increase of the number of patients with scoliosis during the long-term follow-up. CONCLUSIONS Lasting effects of stability in the neurological, urological, and pain domains were observed. Close monitoring during follow-up might contribute to early recognition of progressive scoliosis, in spite of detethering, in a risk group defined by females who underwent tethered cord surgery at or under the age of 12 years old with either lipomyelomeningocele, split cord malformation, or myelomeningocele. Detethering does not appear to protect these patients against progressive scoliosis.
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Affiliation(s)
- S. E. Dulfer
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands
| | - G. Drost
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands ,Department of Neurology, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands
| | - F. Lange
- Department of Neurology, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands
| | - H. L. Journee
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands
| | - F. H. Wapstra
- Department of Orthopedics, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands
| | - E. W. Hoving
- Department of Neurosurgery, University Medical Centre Groningen, University of Groningen, PO Box 30.001, 9700RB Groningen, The Netherlands
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Zutt R, Elting J, van der Hoeven J, Lange F, Tijssen M. Myoclonus subtypes in tertiary referral center. Cortical myoclonus and functional jerks are common. Clin Neurophysiol 2017; 128:253-259. [DOI: 10.1016/j.clinph.2016.10.093] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 09/23/2016] [Accepted: 10/23/2016] [Indexed: 12/29/2022]
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Farías RO, Garabalino MA, Ferraris S, Santa María J, Rovati O, Lange F, Trivillin VA, Monti Hughes A, Pozzi ECC, Thorp SI, Curotto P, Miller ME, Santa Cruz GA, Bortolussi S, Altieri S, Portu AM, Saint Martin G, Schwint AE, González SJ. Toward a clinical application of ex situ boron neutron capture therapy for lung tumors at the RA-3 reactor in Argentina. Med Phys 2016; 42:4161-73. [PMID: 26133616 DOI: 10.1118/1.4922158] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
PURPOSE Many types of lung tumors have a very poor prognosis due to their spread in the whole organ volume. The fact that boron neutron capture therapy (BNCT) would allow for selective targeting of all the nodules regardless of their position, prompted a preclinical feasibility study of ex situ BNCT at the thermal neutron facility of RA-3 reactor in the province of Buenos Aires, Argentina. (l)-4p-dihydroxy-borylphenylalanine fructose complex (BPA-F) biodistribution studies in an adult sheep model and computational dosimetry for a human explanted lung were performed to evaluate the feasibility and the therapeutic potential of ex situ BNCT. METHODS Two kinds of boron biodistribution studies were carried out in the healthy sheep: a set of pharmacokinetic studies without lung excision, and a set that consisted of evaluation of boron concentration in the explanted and perfused lung. In order to assess the feasibility of the clinical application of ex situ BNCT at RA-3, a case of multiple lung metastases was analyzed. A detailed computational representation of the geometry of the lung was built based on a real collapsed human lung. Dosimetric calculations and dose limiting considerations were based on the experimental results from the adult sheep, and on the most suitable information published in the literature. In addition, a workable treatment plan was considered to assess the clinical application in a realistic scenario. RESULTS Concentration-time profiles for the normal sheep showed that the boron kinetics in blood, lung, and skin would adequately represent the boron behavior and absolute uptake expected in human tissues. Results strongly suggest that the distribution of the boron compound is spatially homogeneous in the lung. A constant lung-to-blood ratio of 1.3 ± 0.1 was observed from 80 min after the end of BPA-F infusion. The fact that this ratio remains constant during time would allow the blood boron concentration to be used as a surrogate and indirect quantification of the estimated value in the explanted healthy lung. The proposed preclinical animal model allowed for the study of the explanted lung. As expected, the boron concentration values fell as a result of the application of the preservation protocol required to preserve the lung function. The distribution of the boron concentration retention factor was obtained for healthy lung, with a mean value of 0.46 ± 0.14 consistent with that reported for metastatic colon carcinoma model in rat perfused lung. Considering the human lung model and suitable tumor control probability for lung cancer, a promising average fraction of controlled lesions higher than 85% was obtained even for a low tumor-to-normal boron concentration ratio of 2. CONCLUSIONS This work reports for the first time data supporting the validity of the ovine model as an adequate human surrogate in terms of boron kinetics and uptake in clinically relevant tissues. Collectively, the results and analysis presented would strongly suggest that ex situ whole lung BNCT irradiation is a feasible and highly promising technique that could greatly contribute to the treatment of metastatic lung disease in those patients without extrapulmonary spread, increasing not only the expected overall survival but also the resulting quality of life.
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Affiliation(s)
- R O Farías
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires 1033, Argentina
| | - M A Garabalino
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - S Ferraris
- CIDME, Universidad Maimónides, Buenos Aires 1405, Argentina
| | - J Santa María
- CIDME, Universidad Maimónides, Buenos Aires 1405, Argentina
| | - O Rovati
- CIDME, Universidad Maimónides, Buenos Aires 1405, Argentina
| | - F Lange
- CIDME, Universidad Maimónides, Buenos Aires 1405, Argentina
| | - V A Trivillin
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires 1033, Argentina
| | - A Monti Hughes
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - E C C Pozzi
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - S I Thorp
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - P Curotto
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - M E Miller
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - G A Santa Cruz
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - S Bortolussi
- Istituto Nazionale di Fisica Nucleare, Sezione di Pavia 27100, Italy
| | - S Altieri
- Istituto Nazionale di Fisica Nucleare, Sezione di Pavia 27100, Italy and Dipartimento di Fisica, Università di Pavia, Pavia 27100, Italy
| | - A M Portu
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires 1033, Argentina
| | - G Saint Martin
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina
| | - A E Schwint
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires 1033, Argentina
| | - S J González
- Comisión Nacional de Energía Atómica (CNEA), San Martín 1650, Argentina and Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires 1033, Argentina
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Kopp B, Seer C, Lange F. Exekutivfunktionen bei der Amyotrophen Lateralsklerose. KLIN NEUROPHYSIOL 2015. [DOI: 10.1055/s-0041-106850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- B. Kopp
- Klinik für Neurologie, Medizinische Hochschule Hannover
| | - C. Seer
- Klinik für Neurologie, Medizinische Hochschule Hannover
| | - F. Lange
- Klinik für Neurologie, Medizinische Hochschule Hannover
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Doeuk C, Hersant B, Bosc R, Lange F, SidAhmed-Mezi M, Bouhassira J, Meningaud J. Current indications for low level laser treatment in maxillofacial surgery: a review. Br J Oral Maxillofac Surg 2015; 53:309-15. [DOI: 10.1016/j.bjoms.2015.02.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 02/05/2015] [Indexed: 10/23/2022]
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van Zijl JC, Beudel M, vd Hoeven HJ, Lange F, Tijssen MAJ, Elting JWJ. Electroencephalographic Findings in Posthypoxic Myoclonus. J Intensive Care Med 2015; 31:270-5. [PMID: 25670725 DOI: 10.1177/0885066615571533] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [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: 06/03/2014] [Accepted: 12/17/2014] [Indexed: 11/17/2022]
Abstract
The physical examination findings of early posthypoxic myoclonus (PHM) are associated with poor prognosis. Recent findings indicate that patients with multifocal PHM, assumed to have a cortical origin, have a comparable outcome to resuscitated patients without PHM. Generalized PHM, assumed to have a subcortical myoclonus origin, is still associated with a bad clinical outcome. It is not known whether the electroencephalographic (EEG) findings differ between the multifocal and generalized myoclonus groups nor is the clinical significance clearly defined. Forty-three patients with PHM were retrospectively derived from an EEG database. Patients were categorized as having multifocal (i), generalized (ii), or undetermined (iii) PHM. Outcome was expressed in cerebral performance category scores. The EEG background was categorized into isoelectric (I), low voltage (II), burst suppression (III), status epilepticus (SE; IV), diffuse slowing (V), and mild encephalopathic or normal (VI). 17 patients had generalized PHM and 23 had multifocal PHM (3 undetermined). The EEG showed more SE in generalized compared to multifocal PHM (64% vs 13%, P< .001). Diffuse slowing was more often present in multifocal PHM (52% vs 17%, P < .05). Early-onset myoclonus occurred significantly more often in generalized PHM, and early generalized PHM was invariantly associated with poor outcome. In conclusion, patients with generalized PHM showed more SE. These EEG findings might be either subcortical corollaries or primarily cortical phenomena. Our retrospective results conflict with currently used clinical criteria for myoclonus classification, and we suggest that more refined difference may be needed for accurate assessment of PHM. To better understand PHM, prospective research with standardized clinical assessment and quantitative EEG analysis is needed.
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Affiliation(s)
- J C van Zijl
- Department of Neurology, University Medical Groningen, University of Groningen, Groningen, the Netherlands
| | - M Beudel
- Department of Neurology, University Medical Groningen, University of Groningen, Groningen, the Netherlands
| | - H J vd Hoeven
- Department of Neurology, University Medical Groningen, University of Groningen, Groningen, the Netherlands Department of Clinical Neurophysiology, University Medical Groningen, University of Groningen, Groningen, the Netherlands
| | - F Lange
- Department of Neurology, University Medical Groningen, University of Groningen, Groningen, the Netherlands Department of Clinical Neurophysiology, University Medical Groningen, University of Groningen, Groningen, the Netherlands
| | - M A J Tijssen
- Department of Neurology, University Medical Groningen, University of Groningen, Groningen, the Netherlands
| | - J W J Elting
- Department of Neurology, University Medical Groningen, University of Groningen, Groningen, the Netherlands Department of Clinical Neurophysiology, University Medical Groningen, University of Groningen, Groningen, the Netherlands
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Kopp B, Seer C, Lange F. Zur Psychophysiologie exekutiver Funktionen. KLIN NEUROPHYSIOL 2015. [DOI: 10.1055/s-0034-1398610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- B. Kopp
- Klinik für Neurologie, Medizinische Hochschule Hannover
| | - C. Seer
- Klinik für Neurologie, Medizinische Hochschule Hannover
| | - F. Lange
- Klinik für Neurologie, Medizinische Hochschule Hannover
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Bevacqua RJ, Fernandéz Martín R, Gibbons A, Teixeira D, Canel NG, Lange F, Hiriart MI, Kues WA, Ferraris S, Salamone DF. 355 COMPARISON OF Tn5 AND SLEEPING BEAUTY SYSTEMS IN BOVINE EMBRYOS AND IN OVINE OFFSPRING. Reprod Fertil Dev 2015. [DOI: 10.1071/rdv27n1ab355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Current techniques for the production of transgenic domestic animals remain inefficient. Only recently, DNA transposons resulted in improved efficiencies for mouse and pig transgenesis. In this work, we evaluated Tn5 and Sleeping Beauty systems for transgenesis in bovine and ovine species. First, both transposon systems were assessed in vitro in bovine embryos employing transposons carrying fluorescent reporter genes. In vitro-produced bovine zygotes were microinjected with either 1) a complex of Tn5:egfp transposon (20 ng μL–1) (protein: transgene with mosaic ends recognised by Tn5, in Mg+2 free medium), or 2) two plasmids carrying Sleeping Beauty 100X (pSB100X, 5 ng μL–1) and pT2/Venus transposon (10 ng μL–1). In vitro results for Tn5 transgenesis in bovine showed that blastocysts, Day 4 egfp embryos and egfp blastocysts rates for the group injected with Tn5:egfp did not differ from the group injected with the egfp transposon alone (73/145, 50%; 86/145, 59%; and 65/145, 45% v. 65/129, 50%; 87/129, 67%; and 57/129, 44%, respectively). For SB transgenesis, blastocysts, D4 Venus embryos, and Venus blastocysts rates did not differ between co-injection of pSB100X and pT2/Venus or injection with pT2/Venus alone (46/99, 46.5%; 64/99, 64.6%; and 33/99, 33.3% v. 41/83, 49.4%; 52/83, 62.7%; and 26/83, 31.3%, respectively). However, Venus intensity in blastocysts was markedly higher for the group co-injected with pSB100X and pT2/Venus respective to pT2/Venus alone. Both systems were assessed in vivo for the production of transgenic lambs employing a functional transposon (hrFIX, recombinant human factor IX driven by a Beta-lactoglobulin promoter). Laparoscopic artificial insemination of donor sheep was performed, and presumptive zygotes were flushed from the oviducts. The microinjections were done identically as described for the bovine embryos. A total of 24 presumptive zygotes were recovered and injected with the Tn5:hrFIX complex. Then, 21 zygotes were transferred to 5 synchronized ewes; one pregnancy of siblings was obtained, and one animal was born. Genomic DNA from skin, placenta, and blood was genotyped by PCR, but the hrFIX gene could not be detected. For the SB approach, 64 presumptive zygotes were recovered from 4 superovulated ewes, microinjected with the SB plasmids, and 21 of them were transferred to 7 oestrous synchronized recipients. The remaining zygotes were cultured in vitro and blastocysts (n = 7) were vitrified. Currently, 3 donor ewes are pregnant, one with siblings (4 total fetuses). Deliveries are expected by the end of August of this year. Our results indicate that both Tn5 and SB systems are capable of resulting in the production of transgene expressing embryos, and the presence of the transposases does not affect embryo viability. However, phenotyping of blastocyst stages does not seem to be predictive for stable transgene integration. The in vivo results will help to better address the suitability of Tn5 and SB approaches for the production of transgenic sheep.
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Lange F, Seer C, Dengler R, Kopp B. P2: The brain’s orienting response: a universal electrophysiological signature of executive processing? Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50166-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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André CV, Bosc R, Chader H, Lange F, Hermeziu O, Meningaud JP. [Low level laser therapy in inflammatory and infectious oral diseases]. ACTA ACUST UNITED AC 2014; 115:22-7. [PMID: 24461647 DOI: 10.1016/j.revsto.2013.12.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 09/08/2013] [Accepted: 12/12/2013] [Indexed: 10/25/2022]
Abstract
PURPOSE Low Level Laser Therapy (LLLT) is an increasingly studied technique. The authors of a meta-analysis published in 2012 had already confirmed the effectiveness of LLLT for radio-induced mucitis. Our purpose was to check its indication for similar pathologies. MATERIAL AND METHODS The articles were selected with the PubMed engine. The selected terms were "Low Level Laser Therapy", "oral surgery", "oral infection", "oral inflammation", "oral mucosal lesions", "oral mucosal disease", "stomatitis", "aphtous", "Herpes", "oral lichen planus", and "oral ulceration". The analysis was made on the following criteria: assessment criteria, methodological quality, and bias. We estimated the level of proof according to Sackett's modified score. RESULTS Six articles were selected. Two focused on the effectiveness of LLLT for Herpes simplex virus 1 oral symptoms. Two focused on the effectiveness of LLLT for oral lichen planus. One focused on the effectiveness of LLLT for recurrent aphthous stomatitis. The last one focused on the usefulness of LLLT to control stomatitis pain in the hand-foot-and-mouth disease. CONCLUSION All the selected studies were assessed with a Sackett's score of IV. No study presented the required quality standards to recommend the treatment of LLLT for the selected indications.
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Affiliation(s)
- C-V André
- Service de chirurgie plastique, reconstructrice et esthétique, CHU-hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94000 Créteil, France.
| | - R Bosc
- Service de chirurgie plastique, reconstructrice et esthétique, CHU-hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94000 Créteil, France
| | - H Chader
- Service de chirurgie plastique, reconstructrice et esthétique, CHU-hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94000 Créteil, France
| | - F Lange
- Service de chirurgie plastique, reconstructrice et esthétique, CHU-hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94000 Créteil, France
| | - O Hermeziu
- Service de chirurgie plastique, reconstructrice et esthétique, CHU-hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94000 Créteil, France
| | - J-P Meningaud
- Service de chirurgie plastique, reconstructrice et esthétique, CHU-hôpital Henri-Mondor, 51, avenue du Maréchal-de-Lattre-de-Tassigny, 94000 Créteil, France
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