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Große J, Huppertz C, Röh A, Oertel V, Andresen S, Schade N, Goerke-Arndt F, Kastinger A, Schoofs N, Thomann PA, Henkel K, Malchow B, Plag J, Terziska A, Brand R, Helmig F, Schorb A, Wedekind D, Jockers-Scherübl M, Schneider F, Petzold MB, Ströhle A. Step away from depression-results from a multicenter randomized clinical trial with a pedometer intervention during and after inpatient treatment of depression. Eur Arch Psychiatry Clin Neurosci 2024; 274:709-721. [PMID: 37589727 PMCID: PMC10995038 DOI: 10.1007/s00406-023-01646-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 07/07/2023] [Indexed: 08/18/2023]
Abstract
Evidence for the effectiveness of physical activity (PA) in the treatment of depression prevails for outpatients with mild and moderate symptom levels. For inpatient treatment of severe depression, evidence-based effectiveness exists only for structured and supervised group PA interventions. The Step Away from Depression (SAD) study investigated the effectiveness of an individual pedometer intervention (PI) combined with an activity diary added to inpatient treatment as usual (TAU). In this multicenter randomized controlled trial, 192 patients were randomized to TAU or TAU plus PI. The two primary outcomes at discharge were depression-blindly rated with the Montgomery-Åsberg Depression Rating Scale (MADRS)-and average number of daily steps measured by accelerometers. Secondary outcomes were self-rated depression and PA, anxiety, remission and response rates. Multivariate analysis of variance (MANOVA) revealed no significant difference between both groups for depression and daily steps. Mean MADRS scores at baseline were 29.5 (SD = 8.3) for PI + TAU and 28.8 (SD = 8.1) for TAU and 16.4 (SD = 10.3) and 17.2 (SD = 9.9) at discharge, respectively. Daily steps rose from 6285 (SD = 2321) for PI + TAU and 6182 (SD = 2290) for TAU to 7248 (SD = 2939) and 7325 (SD = 3357). No differences emerged between groups in secondary outcomes. For severely depressed inpatients, a PI without supervision or further psychological interventions is not effective. Monitoring, social reinforcement and motivational strategies should be incorporated in PA interventions for this population to reach effectiveness.
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Affiliation(s)
- Julia Große
- Klinik für Psychiatrie und Psychotherapie, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany.
| | - Charlotte Huppertz
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH Aachen University, Aachen, Germany
| | - Astrid Röh
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Bezirkskrankenhaus Augsburg, Medical Faculty, University of Augsburg, Augsburg, Germany
| | - Viola Oertel
- Klinik für Psychiatrie, Psychosomatik und Psychotherapie, Universitätsklinikum Frankfurt/Main, Frankfurt am Main, Germany
| | - Sara Andresen
- Fachklinik für Psychiatrie, Psychosomatik und Psychotherapie Flensburg der DIAKO NF, Flensburg, Germany
| | - Niklas Schade
- Department of Psychiatry and Psychotherapy, University Medical Center, Göttingen, Germany
- Department of Psychiatry and Psychotherapy, University Medical Center Hamburg-Eppendorf (UKE), Hamburg, Germany
| | - Franziska Goerke-Arndt
- Department of Psychiatry and Psychotherapy, Oberhavel Kliniken GmbH, Hennigsdorf, Germany
| | - Anna Kastinger
- Psychotherapy and Psychosomatics, University Hospital of Psychiatry, Paracelsus Medical University, Salzburg, Austria
| | - Nikola Schoofs
- Klinik für Psychiatrie und Psychotherapie, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | | | - Karsten Henkel
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH Aachen University, Aachen, Germany
| | - Berend Malchow
- Department of Psychiatry and Psychotherapy, University Medical Center, Göttingen, Germany
| | - Jens Plag
- Klinik für Psychiatrie und Psychotherapie, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Aleksandra Terziska
- Klinik für Psychiatrie und Psychotherapie, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
| | - Ralf Brand
- Sport and Exercise Psychology, University of Potsdam, Potsdam, Germany
| | - Frank Helmig
- Fachklinik für Psychiatrie, Psychosomatik und Psychotherapie Flensburg der DIAKO NF, Flensburg, Germany
| | - Alexander Schorb
- Psychotherapy and Psychosomatics, University Hospital of Psychiatry, Paracelsus Medical University, Salzburg, Austria
| | - Dirk Wedekind
- Department of Psychiatry and Psychotherapy, University Medical Center, Göttingen, Germany
| | - Maria Jockers-Scherübl
- Department of Psychiatry and Psychotherapy, Oberhavel Kliniken GmbH, Hennigsdorf, Germany
| | - Frank Schneider
- University Hospital, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Moritz Bruno Petzold
- Klinik für Psychiatrie und Psychotherapie, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
- Department of Psychology, Medical School Berlin, Berlin, Germany
| | - Andreas Ströhle
- Klinik für Psychiatrie und Psychotherapie, Campus Charité Mitte, Charité-Universitätsmedizin Berlin, Corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin and Berlin Institute of Health, Berlin, Germany
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Roell L, Keeser D, Papazov B, Lembeck M, Papazova I, Greska D, Muenz S, Schneider-Axmann T, Sykorova EB, Thieme CE, Vogel BO, Mohnke S, Huppertz C, Roeh A, Keller-Varady K, Malchow B, Stoecklein S, Ertl-Wagner B, Henkel K, Wolfarth B, Tantchik W, Walter H, Hirjak D, Schmitt A, Hasan A, Meyer-Lindenberg A, Falkai P, Maurus I. Effects of Exercise on Structural and Functional Brain Patterns in Schizophrenia-Data From a Multicenter Randomized-Controlled Study. Schizophr Bull 2024; 50:145-156. [PMID: 37597507 PMCID: PMC10754172 DOI: 10.1093/schbul/sbad113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 08/21/2023]
Abstract
BACKGROUND AND HYPOTHESIS Aerobic exercise interventions in people with schizophrenia have been demonstrated to improve clinical outcomes, but findings regarding the underlying neural mechanisms are limited and mainly focus on the hippocampal formation. Therefore, we conducted a global exploratory analysis of structural and functional neural adaptations after exercise and explored their clinical implications. STUDY DESIGN In this randomized controlled trial, structural and functional MRI data were available for 91 patients with schizophrenia who performed either aerobic exercise on a bicycle ergometer or underwent a flexibility, strengthening, and balance training as control group. We analyzed clinical and neuroimaging data before and after 6 months of regular exercise. Bayesian linear mixed models and Bayesian logistic regressions were calculated to evaluate effects of exercise on multiple neural outcomes and their potential clinical relevance. STUDY RESULTS Our results indicated that aerobic exercise in people with schizophrenia led to structural and functional adaptations mainly within the default-mode network, the cortico-striato-pallido-thalamo-cortical loop, and the cerebello-thalamo-cortical pathway. We further observed that volume increases in the right posterior cingulate gyrus as a central node of the default-mode network were linked to improvements in disorder severity. CONCLUSIONS These exploratory findings suggest a positive impact of aerobic exercise on 3 cerebral networks that are involved in the pathophysiology of schizophrenia. CLINICAL TRIALS REGISTRATION The underlying study of this manuscript was registered in the International Clinical Trials Database, ClinicalTrials.gov (NCT number: NCT03466112, https://clinicaltrials.gov/ct2/show/NCT03466112?term=NCT03466112&draw=2&rank=1) and in the German Clinical Trials Register (DRKS-ID: DRKS00009804).
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Affiliation(s)
- Lukas Roell
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
- Neuroimaging Core Unit Munich (NICUM), University Hospital, LMU Munich, Munich, Germany
| | - Daniel Keeser
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
- Neuroimaging Core Unit Munich (NICUM), University Hospital, LMU Munich, Munich, Germany
- Department of Radiology, University Hospital, LMU Munich, Munich, Germany
| | - Boris Papazov
- Department of Radiology, University Hospital, LMU Munich, Munich, Germany
| | - Moritz Lembeck
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Irina Papazova
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Medical Faculty, University of Augsburg, Bezirkskrankenhaus Augsburg, Augsburg, Germany
| | - David Greska
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Susanne Muenz
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Thomas Schneider-Axmann
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Eliska B Sykorova
- Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Christina E Thieme
- Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Bob O Vogel
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Sebastian Mohnke
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Charlotte Huppertz
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany
| | - Astrid Roeh
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Medical Faculty, University of Augsburg, Bezirkskrankenhaus Augsburg, Augsburg, Germany
| | - Katriona Keller-Varady
- Hannover Medical School, Department of Rehabilitation and Sports Medicine, Hannover, Germany
| | - Berend Malchow
- Department of Psychiatry and Psychotherapy, University Hospital Göttingen, Göttingen, Germany
| | - Sophia Stoecklein
- Department of Radiology, University Hospital, LMU Munich, Munich, Germany
| | - Birgit Ertl-Wagner
- Department of Radiology, University Hospital, LMU Munich, Munich, Germany
- Division of Neuroradiology, Department of Diagnostic Imaging, The Hospital for Sick Children, Toronto, Canada
- Department of Medical Imaging, University of Toronto, Toronto, Canada
| | - Karsten Henkel
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany
| | - Bernd Wolfarth
- Department of Sports Medicine, University Hospital Charité Berlin, Berlin, Germany
| | - Wladimir Tantchik
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Henrik Walter
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Dusan Hirjak
- Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Andrea Schmitt
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
- Laboratory of Neuroscience (LIM27), Institute of Psychiatry, University of Sao Paulo, São Paulo, Brazil
| | - Alkomiet Hasan
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Medical Faculty, University of Augsburg, Bezirkskrankenhaus Augsburg, Augsburg, Germany
| | | | - Peter Falkai
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
- Max Planck Institute of Psychiatry, Munich, Germany
| | - Isabel Maurus
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
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3
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Maurus I, Roell L, Lembeck M, Papazova I, Greska D, Muenz S, Wagner E, Campana M, Schwaiger R, Schneider-Axmann T, Rosenberger K, Hellmich M, Sykorova E, Thieme CE, Vogel BO, Harder C, Mohnke S, Huppertz C, Roeh A, Keller-Varady K, Malchow B, Walter H, Wolfarth B, Wölwer W, Henkel K, Hirjak D, Schmitt A, Hasan A, Meyer-Lindenberg A, Falkai P. Exercise as an add-on treatment in individuals with schizophrenia: Results from a large multicenter randomized controlled trial. Psychiatry Res 2023; 328:115480. [PMID: 37716320 DOI: 10.1016/j.psychres.2023.115480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 09/07/2023] [Accepted: 09/09/2023] [Indexed: 09/18/2023]
Abstract
Current treatment methods do not achieve recovery for most individuals with schizophrenia, and symptoms such as negative symptoms and cognitive deficits often persist. Aerobic endurance training has been suggested as a potential add-on treatment targeting both physical and mental health. We performed a large-scale multicenter, rater-blind, parallel-group randomized controlled clinical trial in individuals with stable schizophrenia. Participants underwent a professionally supervised six-month training comprising either aerobic endurance training (AET) or flexibility, strengthening, and balance training (FSBT, control group), follow-up was another six months. The primary endpoint was all-cause discontinuation (ACD); secondary endpoints included effects on psychopathology, cognition, functioning, and cardiovascular risk. In total, 180 participants were randomized. AET was not superior to FSBT in ACD and most secondary outcomes, with dropout rates of 59.55% and 57.14% in the six-month active phase, respectively. However, both groups showed significant improvements in positive, general, and total symptoms, levels of functioning and in cognitive performance. A higher training frequency additionally promoted further memory domains. Participants with higher baseline cognitive abilities were more likely to respond to the interventions. Our results support integrating exercise into schizophrenia treatment, while future studies should aim to develop personalized training recommendations to maximize exercise-induced benefits.
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Affiliation(s)
- Isabel Maurus
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany.
| | - Lukas Roell
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany; Neuroimaging Core Unit Munich (NICUM), University Hospital, LMU Munich, Munich, Germany
| | - Moritz Lembeck
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Irina Papazova
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Medical Faculty, University of Augsburg, Bezirkskrankenhaus Augsburg, Augsburg, Germany
| | - David Greska
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Susanne Muenz
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Elias Wagner
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Mattia Campana
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Rebecca Schwaiger
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Thomas Schneider-Axmann
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany
| | - Kerstin Rosenberger
- Institute of Medical Statistics and Computational Biology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Martin Hellmich
- Institute of Medical Statistics and Computational Biology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Eliska Sykorova
- Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Cristina E Thieme
- Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Bob O Vogel
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Carolin Harder
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Sebastian Mohnke
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Charlotte Huppertz
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Germany
| | - Astrid Roeh
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Medical Faculty, University of Augsburg, Bezirkskrankenhaus Augsburg, Augsburg, Germany
| | | | - Berend Malchow
- Department of Psychiatry and Psychotherapy, University Hospital Göttingen, Göttingen, Germany
| | - Henrik Walter
- Department of Psychiatry and Psychotherapy, University Hospital Charité Berlin, Berlin, Germany
| | - Bernd Wolfarth
- Department of Sports Medicine, University Hospital Charité Berlin, Berlin, Germany
| | - Wolfgang Wölwer
- Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich-Heine University, Duesseldorf, Germany
| | - Karsten Henkel
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Germany
| | - Dusan Hirjak
- Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, Germany
| | - Andrea Schmitt
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany; Laboratory of Neuroscience (LIM27), Institute of Psychiatry, University of Sao Paulo, São Paulo, Brazil
| | - Alkomiet Hasan
- Department of Psychiatry, Psychotherapy and Psychosomatics of the University Augsburg, Medical Faculty, University of Augsburg, Bezirkskrankenhaus Augsburg, Augsburg, Germany
| | | | - Peter Falkai
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Munich, Germany; Max Planck Institute of Psychiatry, Munich, Germany
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Janowitz C, Mahmoodinezhad A, Kot M, Morales C, Naumann F, Plate P, Zoellner MH, Bärwolf F, Stolarek D, Wenger C, Henkel K, Flege JI. Toward controlling the Al 2O 3/ZnO interface properties by in situ ALD preparation. Dalton Trans 2022; 51:9291-9301. [DOI: 10.1039/d1dt04008a] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electronic band alignment of an alumina/zinc oxide thin-film heterostructure solely grown by atomic layer deposition has been determined by XPS/UPS depth profiling, correlating the electronic properties with the interface chemical composition.
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Affiliation(s)
- Christoph Janowitz
- Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus–Senftenberg, K.-Zuse-Str. 1, 03046 Cottbus, Germany
| | - Ali Mahmoodinezhad
- Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus–Senftenberg, K.-Zuse-Str. 1, 03046 Cottbus, Germany
| | - Małgorzata Kot
- Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus–Senftenberg, K.-Zuse-Str. 1, 03046 Cottbus, Germany
| | - Carlos Morales
- Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus–Senftenberg, K.-Zuse-Str. 1, 03046 Cottbus, Germany
| | - Franziska Naumann
- SENTECH Instruments GmbH, Schwarzschildstraße 2, 12489 Berlin, Germany
| | - Paul Plate
- SENTECH Instruments GmbH, Schwarzschildstraße 2, 12489 Berlin, Germany
| | - Marvin Hartwig Zoellner
- IHP – Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
| | - Florian Bärwolf
- IHP – Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
| | - David Stolarek
- IHP – Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
| | - Christian Wenger
- IHP – Leibniz-Institut für innovative Mikroelektronik, Im Technologiepark 25, 15236 Frankfurt (Oder), Germany
| | - Karsten Henkel
- Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus–Senftenberg, K.-Zuse-Str. 1, 03046 Cottbus, Germany
| | - Jan Ingo Flege
- Applied Physics and Semiconductor Spectroscopy, Brandenburg University of Technology Cottbus–Senftenberg, K.-Zuse-Str. 1, 03046 Cottbus, Germany
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5
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Maurus I, Hasan A, Schmitt A, Roeh A, Keeser D, Malchow B, Schneider-Axmann T, Hellmich M, Schmied S, Lembeck M, Keller-Varady K, Papazova I, Hirjak D, Topor CE, Walter H, Mohnke S, Vogel BO, Wölwer W, Schneider F, Henkel K, Meyer-Lindenberg A, Falkai P. Aerobic endurance training to improve cognition and enhance recovery in schizophrenia: design and methodology of a multicenter randomized controlled trial. Eur Arch Psychiatry Clin Neurosci 2021; 271:315-324. [PMID: 32748261 PMCID: PMC8257533 DOI: 10.1007/s00406-020-01175-2] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 07/22/2020] [Indexed: 12/20/2022]
Abstract
Even today, patients with schizophrenia often have an unfavorable outcome. Negative symptoms and cognitive deficits are common features in many patients and prevent recovery. In recent years, aerobic endurance training has emerged as a therapeutic approach with positive effects on several domains of patients' health. However, appropriately sized, multicenter randomized controlled trials that would allow better generalization of results are lacking. The exercise study presented here is a multicenter, rater-blind, two-armed, parallel-group randomized clinical trial in patients with clinically stable schizophrenia being conducted at five German tertiary hospitals. The intervention group performs aerobic endurance training on bicycle ergometers three times per week for 40-50 min/session (depending on the intervention week) for a total of 26 weeks, and the control group performs balance and tone training for the same amount of time. Participants are subsequently followed up for 26 weeks. The primary endpoint is all-cause discontinuation; secondary endpoints include psychopathology, cognition, daily functioning, cardiovascular risk factors, and explorative biological measures regarding the underlying mechanisms of exercise. A total of 180 patients will be randomized. With currently 162 randomized participants, our study is the largest trial to date to investigate endurance training in patients with schizophrenia. We hypothesize that aerobic endurance training has beneficial effects on patients' mental and physical health, leading to lower treatment discontinuation rates and improving disease outcomes. The study results will provide a basis for recommending exercise interventions as an add-on therapy in patients with schizophrenia.The study is registered in the International Clinical Trials Database (ClinicalTrials.gov identifier [NCT number]: NCT03466112) and in the German Clinical Trials Register (DRKS-ID: DRKS00009804).
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Affiliation(s)
- Isabel Maurus
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany.
| | - Alkomiet Hasan
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
- Department of Psychiatry and Psychosomatics of the University Augsburg, Bezirkskrankenhaus Augsburg, University of Augsburg, Augsburg, Germany
| | - Andrea Schmitt
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
- Laboratory of Neuroscience (LIM27), Institute of Psychiatry, University of Sao Paulo, São Paulo, Brazil
| | - Astrid Roeh
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
| | - Daniel Keeser
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
- Department of Radiology, University Hospital, LMU Munich, Munich, Germany
| | - Berend Malchow
- Department of Psychiatry and Psychotherapy, University Hospital Göttingen, Göttingen, Germany
| | - Thomas Schneider-Axmann
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
| | - Martin Hellmich
- Faculty of Medicine, Institute of Medical Statistics and Computational Biology, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Sabine Schmied
- Faculty of Medicine, Clinical Trials Centre Cologne, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Moritz Lembeck
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
| | | | - Irina Papazova
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
| | - Dusan Hirjak
- Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Heidelberg, Germany
| | - Cristina E Topor
- Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Heidelberg, Germany
| | - Henrik Walter
- Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Sebastian Mohnke
- Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Bob O Vogel
- Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Wolfgang Wölwer
- Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich-Heine University, Duesseldorf, Germany
| | - Frank Schneider
- University Hospital, Heinrich-Heine University, Düsseldorf, Germany
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH, Aachen, Germany
| | - Karsten Henkel
- Department of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH, Aachen, Germany
| | - Andreas Meyer-Lindenberg
- Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Heidelberg, Germany
| | - Peter Falkai
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany
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6
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Maurus I, Hasan A, Schmitt A, Roeh A, Keeser D, Malchow B, Schneider-Axmann T, Hellmich M, Schmied S, Lembeck M, Keller-Varady K, Papazova I, Hirjak D, Topor CE, Walter H, Mohnke S, Vogel BO, Wölwer W, Schneider F, Henkel K, Meyer-Lindenberg A, Falkai P. Correction to: Aerobic endurance training to improve cognition and enhance recovery in schizophrenia: design and methodology of a multicenter randomized controlled trial. Eur Arch Psychiatry Clin Neurosci 2021; 271:1405-1406. [PMID: 34226950 PMCID: PMC8429360 DOI: 10.1007/s00406-021-01289-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Isabel Maurus
- Department of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336, Munich, Germany.
| | - Alkomiet Hasan
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany ,grid.7307.30000 0001 2108 9006Department of Psychiatry and Psychosomatics of the University Augsburg, Bezirkskrankenhaus Augsburg, University of Augsburg, Augsburg, Germany
| | - Andrea Schmitt
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany ,grid.11899.380000 0004 1937 0722Laboratory of Neuroscience (LIM27), Institute of Psychiatry, University of Sao Paulo, São Paulo, Brazil
| | - Astrid Roeh
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany
| | - Daniel Keeser
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany ,grid.5252.00000 0004 1936 973XDepartment of Radiology, University Hospital, LMU Munich, Munich, Germany
| | - Berend Malchow
- grid.411984.10000 0001 0482 5331Department of Psychiatry and Psychotherapy, University Hospital Göttingen, Göttingen, Germany
| | - Thomas Schneider-Axmann
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany
| | - Martin Hellmich
- grid.6190.e0000 0000 8580 3777Faculty of Medicine, Institute of Medical Statistics and Computational Biology, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Sabine Schmied
- grid.6190.e0000 0000 8580 3777Faculty of Medicine, Clinical Trials Centre Cologne, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Moritz Lembeck
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany
| | - Katriona Keller-Varady
- grid.10423.340000 0000 9529 9877Institute of Sports Medicine, Hannover Medical School, Hannover, Germany
| | - Irina Papazova
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany
| | - Dusan Hirjak
- grid.7700.00000 0001 2190 4373Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Heidelberg, Germany
| | - Cristina E. Topor
- grid.7700.00000 0001 2190 4373Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Heidelberg, Germany
| | - Henrik Walter
- grid.7468.d0000 0001 2248 7639Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Sebastian Mohnke
- grid.7468.d0000 0001 2248 7639Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Bob O. Vogel
- grid.7468.d0000 0001 2248 7639Department of Psychiatry and Psychotherapy, Charité Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Wolfgang Wölwer
- grid.411327.20000 0001 2176 9917Department of Psychiatry and Psychotherapy, Medical Faculty, Heinrich-Heine University, Duesseldorf, Germany
| | - Frank Schneider
- grid.14778.3d0000 0000 8922 7789University Hospital, Heinrich-Heine University, Düsseldorf, Germany ,grid.1957.a0000 0001 0728 696XDepartment of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH, Aachen, Germany
| | - Karsten Henkel
- grid.1957.a0000 0001 0728 696XDepartment of Psychiatry, Psychotherapy and Psychosomatics, Faculty of Medicine, RWTH, Aachen, Germany
| | - Andreas Meyer-Lindenberg
- grid.7700.00000 0001 2190 4373Medical Faculty Mannheim, Central Institute of Mental Health, Heidelberg University, Heidelberg, Germany
| | - Peter Falkai
- grid.5252.00000 0004 1936 973XDepartment of Psychiatry and Psychotherapy, University Hospital, LMU Munich, Nussbaumstrasse 7, 80336 Munich, Germany
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7
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Abstract
The treatment of mental disorders in older adults is often restricted by limitations in efficacy and tolerability of pharmacologically dominated standard therapeutic strategies. Therefore, nonpharmacological therapeutic alternatives and supplements play a crucial role in these patients. Structured exercise and training are interventions that are associated with a high level of evidence in prevention and treatment of mental and cognitive disorders. This article is based on a selective search of the literature and provides an overview of the current scientific evidence with respect to the mechanisms of action, the effects on frequently occurring clinical disorders and modalities of the exercise interventions.
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Affiliation(s)
- Karsten Henkel
- Klinik für Gerontopsychiatrie, Klinikum Christophsbad Göppingen, Faurndauer Str. 6-28, 73035, Göppingen, Deutschland. .,Klinik für Psychiatrie, Psychotherapie und Psychosomatik, Uniklinik RWTH Aachen, Pauwelsstr. 30, 52074, Aachen, Deutschland.
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8
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9
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Maity K, Garain S, Henkel K, Schmeißer D, Mandal D. Natural Sugar-Assisted, Chemically Reinforced, Highly Durable Piezoorganic Nanogenerator with Superior Power Density for Self-Powered Wearable Electronics. ACS Appl Mater Interfaces 2018; 10:44018-44032. [PMID: 30456939 DOI: 10.1021/acsami.8b15320] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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: 06/09/2023]
Abstract
Natural piezoelectric materials are of increasing interest, particularly for applications in biocompatible, implantable, and flexible electronic devices. In this paper, we introduce a cost-effective, easily available natural piezoelectric material, that is, sugar in the field of wearable piezoelectric nanogenerators (PNGs) where low electrical output, biocompatibility, and performance durability are still critical issues. We report on a high-performance piezoorganic nanogenerator (PONG) based on the hybridization of sugar-encapsulated polyvinylidene fluoride (PVDF) nanofiber webs (SGNFW). We explore the crucial role of single-crystal sugar having a fascinating structure along with the synergistic enhancement of piezoelectricity during nanoconfinement of sugar-interfaced macromolecular PVDF chains. As a consequence, the SGNFW-based PONG exhibits outstanding electricity generation capability (e.g., ∼100 V under 10 kPa human finger impact and maximum power density of 33 mW/m2) in combination with sensitivity to abundantly available different mechanical sources (such as wind flow, vibration, personal electronics, and acoustic vibration). Consequently, it opens up suitability in multifunctional self-powered wearable sensor designs for realistic implementation. In addition, commercially available capacitors are charged up effectively by the PONG because of its rapid energy storage capability. The high performance of the PONG not only offers "battery-free" energy generation (several portable units of light-emitting diodes and a liquid crystal display screen are powered up without using external storage) but also promises its use in wireless signal transmitting systems, which widens the potential in personal health care monitoring. Furthermore, owing to the geometrical stress confinement effect, the PONG is proven to be a highly durable power-generating device validated by stability test over 10 weeks. Therefore, the organic nanogenerator would be a convenient solution for portable personal electronic devices that are expected to operate in a self-powered manner.
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Affiliation(s)
- Kuntal Maity
- Organic Nano-Piezoelectric Device Laboratory (ONPDL), Department of Physics , Jadavpur University , Kolkata 700032 , India
| | - Samiran Garain
- Organic Nano-Piezoelectric Device Laboratory (ONPDL), Department of Physics , Jadavpur University , Kolkata 700032 , India
- Applied Physics and Sensor Technology , Brandenburg University of Technology Cottbus-Senftenberg , K.-Wachsmann-Allee 17 , 03046 Cottbus , Germany
| | - Karsten Henkel
- Applied Physics and Sensor Technology , Brandenburg University of Technology Cottbus-Senftenberg , K.-Wachsmann-Allee 17 , 03046 Cottbus , Germany
- Applied Physics and Semiconductor Spectroscopy , Brandenburg University of Technology Cottbus-Senftenberg , K.-Zuse-Str. 1 , 03046 Cottbus , Germany
| | - Dieter Schmeißer
- Applied Physics and Sensor Technology , Brandenburg University of Technology Cottbus-Senftenberg , K.-Wachsmann-Allee 17 , 03046 Cottbus , Germany
| | - Dipankar Mandal
- Organic Nano-Piezoelectric Device Laboratory (ONPDL), Department of Physics , Jadavpur University , Kolkata 700032 , India
- Institute of Nano Science & Technology (INST) , Mohali 160062 , India
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10
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Das C, Kot M, Rouissi Z, Kędzierski K, Henkel K, Schmeißer D. Selective Deposition of an Ultrathin Pt Layer on a Au-Nanoisland-Modified Si Photocathode for Hydrogen Generation. ACS Omega 2017; 2:1360-1366. [PMID: 31457509 PMCID: PMC6641136 DOI: 10.1021/acsomega.6b00374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 02/17/2017] [Indexed: 05/07/2023]
Abstract
Platinum, being the most efficient and stable catalyst, is used in photoelectrochemical (PEC) devices. However, a minimal amount of Pt with maximum catalytic activity is required to be used to minimize the cost of production. In this work, we use an environmentally friendly, cost-effective, and less Pt-consuming method to prepare PEC devices for the hydrogen evolution reaction (HER). The Pt monolayer catalyst is selectively deposited on a Au-nanoisland-supported boron-doped p-type Si (100) photocathode. The PEC device based on the Si photocathode with an ultralow loading of the Pt catalyst exhibits a comparable performance for the HER to that of devices with a thick Pt layer. In addition, we demonstrate that by using a thin TiO2 layer deposited by atomic layer deposition photo-oxidation of the Si photocathode can be blocked resulting in a stable PEC performance.
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Affiliation(s)
- Chittaranjan Das
- Angewandte
Physik-Sensorik, Brandenburgische Technische
Universität Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany
- E-mail:
| | - Malgorzata Kot
- Angewandte
Physik-Sensorik, Brandenburgische Technische
Universität Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Zied Rouissi
- Angewandte
Physik-Sensorik, Brandenburgische Technische
Universität Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Kamil Kędzierski
- Angewandte
Physik-Sensorik, Brandenburgische Technische
Universität Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany
- Faculty
of Technical Physics, Institute of Physics, Poznan University of Technology, 60-965 Poznan, Poland
| | - Karsten Henkel
- Angewandte
Physik-Sensorik, Brandenburgische Technische
Universität Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Dieter Schmeißer
- Angewandte
Physik-Sensorik, Brandenburgische Technische
Universität Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046 Cottbus, Germany
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11
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Kot M, Das C, Wang Z, Henkel K, Rouissi Z, Wojciechowski K, Snaith HJ, Schmeisser D. Room-Temperature Atomic Layer Deposition of Al 2 O 3 : Impact on Efficiency, Stability and Surface Properties in Perovskite Solar Cells. ChemSusChem 2016; 9:3401-3406. [PMID: 27925444 DOI: 10.1002/cssc.201601186] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [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: 08/26/2016] [Revised: 10/04/2016] [Indexed: 05/16/2023]
Abstract
In this work, solar cells with a freshly made CH3 NH3 PbI3 perovskite film showed a power conversion efficiency (PCE) of 15.4 % whereas the one with 50 days aged perovskite film only 6.1 %. However, when the aged perovskite was covered with a layer of Al2 O3 deposited by atomic layer deposition (ALD) at room temperature (RT), the PCE value was clearly enhanced. X-ray photoelectron spectroscopy study showed that the ALD precursors are chemically active only at the perovskite surface and passivate it. Moreover, the RT-ALD-Al2 O3 -covered perovskite films showed enhanced ambient air stability.
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Affiliation(s)
- Malgorzata Kot
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046, Cottbus, Germany
| | - Chittaranjan Das
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046, Cottbus, Germany
| | - Zhiping Wang
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX13PU, United Kingdom
| | - Karsten Henkel
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046, Cottbus, Germany
| | - Zied Rouissi
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046, Cottbus, Germany
| | - Konrad Wojciechowski
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX13PU, United Kingdom
| | - Henry J Snaith
- Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX13PU, United Kingdom
| | - Dieter Schmeisser
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, Konrad-Wachsmann-Allee 17, 03046, Cottbus, Germany
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12
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Das C, Kot M, Henkel K, Schmeisser D. Engineering of Sub-Nanometer SiOx Thickness in Si Photocathodes for Optimized Open Circuit Potential. ChemSusChem 2016; 9:2332-2336. [PMID: 27510311 DOI: 10.1002/cssc.201600777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Indexed: 06/06/2023]
Abstract
Silicon is one of the most promising materials to be used for tandem-cell water-splitting devices. However, the electrochemical instability of bare Si makes it difficult to be used for stable devices. Besides that, the photovoltage loss in Si, caused by several factors (e.g., metal oxide protection layer and/or SiO2 /Si or catalyst/Si interface), limits its use in these devices. In this work, we present that an optimized open circuit potential (OCP) of Si can be obtained by controlling the SiOx thickness in sub-nanometer range. It can be done by means of a simple and cost-effective way using the combination of a wet chemical etching and the low temperature atomic layer deposition (ALD) of TiO2 . We have found that a certain thickness of the native SiOx is necessary to prevent further oxidation of the Si photocathode during the ALD growth of TiO2 . Moreover, covering the Si photocathode with an ALD TiO2 layer enhances its stability.
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Affiliation(s)
- Chittaranjan Das
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046, Cottbus, Germany.
| | - Malgorzata Kot
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046, Cottbus, Germany
| | - Karsten Henkel
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046, Cottbus, Germany
| | - Dieter Schmeisser
- Applied Physics and Sensors, Brandenburg University of Technology Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046, Cottbus, Germany
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13
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Garain S, Barman K, Sinha TK, Jasimuddin S, Haeberle J, Henkel K, Schmeisser D, Mandal D. Cerium(III) Complex Modified Gold Electrode: An Efficient Electrocatalyst for the Oxygen Evolution Reaction. ACS Appl Mater Interfaces 2016; 8:21294-21301. [PMID: 27490440 DOI: 10.1021/acsami.6b05236] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Exploring efficient and inexpensive electrocatalysts for the oxidation of water is of great importance for various electrochemical energy storage and conversion technologies. In the present study, a new water-soluble [Ce(III)(DMF) (HSO4)3] complex was synthesized and characterized by UV-vis, photoluminescence, and high-resolution X-ray photoelectron spectroscopy techniques. Owing to classic 5d → 4f transitions, an intense photoluminescence in the UV region was observed from the water-soluble [Ce(III)(DMF) (HSO4)3] complex. A stacking electrode was designed where self-assembled l-cysteine monolayer modified gold was immobilized with the synthesized cerium complex and was characterized by scanning electron microscopy, electrochemical impedance spectroscopy, and cyclic voltammetry. The resulting electrode, i.e., [Ce(III)(DMF) (HSO4)3]-l-cysteine-Au stacks shows high electrocatalytic water oxidation behavior at an overpotential of η ≈ 0.34 V under neutral pH conditions. We also demonstrated a way where the overpotential is possible to decrease upon irradiation of UV light.
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Affiliation(s)
- Samiran Garain
- Organic Nano-Piezoelectric Device Laboratory, Department of Physics Jadavpur University Kolkata700032, India
| | - Koushik Barman
- Department of Chemistry, Assam University , Silchar 788011, India
| | - Tridib Kumar Sinha
- Materials Science Centre, Indian Institute of Technology (IIT) , Kharagpur 721302, India
| | - Sk Jasimuddin
- Department of Chemistry, Assam University , Silchar 788011, India
| | - Jörg Haeberle
- Brandenburgische Technische Universität Cottbus-Senftenberg , Angewandte Physik-Sensorik, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Karsten Henkel
- Brandenburgische Technische Universität Cottbus-Senftenberg , Angewandte Physik-Sensorik, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Dieter Schmeisser
- Brandenburgische Technische Universität Cottbus-Senftenberg , Angewandte Physik-Sensorik, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Dipankar Mandal
- Organic Nano-Piezoelectric Device Laboratory, Department of Physics Jadavpur University Kolkata700032, India
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14
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Rademacher L, Prinz S, Winz O, Henkel K, Dietrich CA, Schmaljohann J, Mohammadkhani Shali S, Schabram I, Stoppe C, Cumming P, Hilgers RD, Kumakura Y, Coburn M, Mottaghy FM, Gründer G, Vernaleken I. Effects of Smoking Cessation on Presynaptic Dopamine Function of Addicted Male Smokers. Biol Psychiatry 2016; 80:198-206. [PMID: 26803340 DOI: 10.1016/j.biopsych.2015.11.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 10/25/2015] [Accepted: 11/11/2015] [Indexed: 10/22/2022]
Abstract
BACKGROUND There is evidence of abnormal cerebral dopamine transmission in nicotine-dependent smokers, but it is unclear whether dopaminergic abnormalities are due to acute nicotine abuse or whether they persist with abstinence. We addressed this question by conducting longitudinal positron emission tomography (PET) examination of smokers before and after 3 months of abstinence. METHODS We obtained baseline 6-[(18)F]fluoro-L-DOPA (FDOPA)-PET scans in 15 nonsmokers and 30 nicotine-dependent smokers, who either smoked as per their usual habit or were in acute withdrawal. All smokers then underwent cessation treatment, and successful abstainers were re-examined by FDOPA-PET after 3 months of abstinence (n = 15). Uptake of FDOPA was analyzed using a steady-state model yielding estimates of the dopamine synthesis capacity (K); the turnover of tracer dopamine formed in living brain (kloss); and the tracer distribution volume (Vd), which is an index of dopamine storage capacity. RESULTS Compared with nonsmokers, K was 15% to 20% lower in the caudate nuclei of consuming smokers. Intraindividual comparisons of consumption and long-term abstinence revealed significant increases in K in the right dorsal and left ventral caudate nuclei. Relative to acute withdrawal, Vd significantly decreased in the right ventral and dorsal caudate after prolonged abstinence. Severity of nicotine dependence significantly correlated with dopamine synthesis capacity and dopamine turnover in the bilateral ventral putamen of consuming smokers. CONCLUSIONS The results suggest a lower dopamine synthesis capacity in nicotine-dependent smokers that appears to normalize with abstinence. Further investigations are needed to clarify the role of dopamine in nicotine addiction to help develop smoking prevention and cessation treatments.
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Affiliation(s)
- Lena Rademacher
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen; Department of Psychiatry and Psychotherapy, Social Neuroscience Laboratory, University of Lübeck, Lübeck, Germany.
| | - Susanne Prinz
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen; Department of Psychiatry and Psychotherapy, Centre for Integrative Psychiatry, University of Zürich, Rheinau, Switzerland
| | - Oliver Winz
- Department of Nuclear Medicine, RWTH Aachen University, Aachen
| | - Karsten Henkel
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen
| | - Claudia A Dietrich
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen
| | | | | | - Ina Schabram
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen
| | - Christian Stoppe
- Department of Anesthesiology, RWTH Aachen University, Aachen; Institute of Biochemistry and Molecular Cell Biology, RWTH Aachen University, Aachen
| | - Paul Cumming
- Department of Neuropsychiatry and Psychosomatic Medicine, Oslo University Hospital, Oslo, Norway; School of Psychology and Counselling, Queensland University of Technology, Brisbane, Queensland, Australia
| | | | - Yoshitaka Kumakura
- Department of Pharmacology and Neuroscience, University of Copenhagen, Copenhagen, Denmark
| | - Mark Coburn
- Department of Anesthesiology, RWTH Aachen University, Aachen
| | - Felix M Mottaghy
- Department of Nuclear Medicine, RWTH Aachen University, Aachen; Jülich/Aachen Research Alliance, Aachen, Germany; Department of Nuclear Medicine, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Gerhard Gründer
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen; Jülich/Aachen Research Alliance, Aachen, Germany
| | - Ingo Vernaleken
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen; Jülich/Aachen Research Alliance, Aachen, Germany
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15
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Schlüter T, Winz O, Henkel K, Eggermann T, Mohammadkhani-Shali S, Dietrich C, Heinzel A, Decker M, Cumming P, Zerres K, Piel M, Mottaghy FM, Vernaleken I. MAOA-VNTR polymorphism modulates context-dependent dopamine release and aggressive behavior in males. Neuroimage 2015; 125:378-385. [PMID: 26481676 DOI: 10.1016/j.neuroimage.2015.10.031] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [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: 06/02/2015] [Revised: 09/24/2015] [Accepted: 10/12/2015] [Indexed: 12/26/2022] Open
Abstract
A recent [(18)F]FDOPA-PET study reports negative correlations between dopamine synthesis rates and aggressive behavior. Since dopamine is among the substrates for monoamine oxidase A (MAOA), this investigation examines whether functional allelic variants of the MAOA tandem repeat (VNTR) promotor polymorphism, which is known to modulate aggressive behavior, influences dopamine release and aggression in response to violent visual stimuli. We selected from a genetic prescreening sample, strictly case-matched groups of 2×12 healthy male subjects with VNTRs predictive of high (MAOA-High) and low (MAOA-Low) MAOA expression. Subjects underwent pairs of PET sessions (dopamine D2/3 ligand [(18)F]DMFP) while viewing a movie of neutral content, versus violent content. Directly afterwards, aggressive behavior was assessed by the Point Subtraction Aggression Paradigm (PSAP). Finally, PET data of 23 participants and behavioral data of 22 participants were analyzed due to post hoc exclusion criteria. In the genetic prescreening sample MAOA-Low carriers had significantly increased scores on the Buss-Perry Aggression Questionnaire. In the PET-study-group, aggressive behavior under the emotional neutral condition was significantly higher in the MAOA-Low group. Interestingly, the two MAOA-groups showed inverse dopaminergic and behavioral reactions to the violent movie: The MAOA-High group showed higher dopamine release and increased aggression after the violent movie; MAOA-Low subjects showed decreases in aggressive behavior and no consistent dopamine release. These results indicate a possible impact of the MAOA-promotor polymorphism on the neurobiological modulation of aggressive behavior. However, the data do not support approaches stating that MAOA-Low fosters aggression by a simple pro-dopaminergic mechanism.
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Affiliation(s)
- Thorben Schlüter
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, 52074 Aachen, Germany.
| | - Oliver Winz
- Department of Nuclear Medicine, RWTH Aachen University, 52074 Aachen, Germany
| | - Karsten Henkel
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, 52074 Aachen, Germany
| | - Thomas Eggermann
- Institute of Human Genetics, RWTH Aachen University, 52074 Aachen, Germany
| | | | - Claudia Dietrich
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, 52074 Aachen, Germany
| | - Alexander Heinzel
- Department of Nuclear Medicine, RWTH Aachen University, 52074 Aachen, Germany; Jülich/Aachen Research Alliance (JARA), Jülich/Aachen, Germany
| | - Michel Decker
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, 52074 Aachen, Germany
| | - Paul Cumming
- Department of Neuropsychiatry and Psychosomatic Medicine, Oslo University Hospital, Oslo, Norway; Department of Neuroscience and Pharmacology, University of Copenhagen, Denmark
| | - Klaus Zerres
- Institute of Human Genetics, RWTH Aachen University, 52074 Aachen, Germany
| | - Markus Piel
- Institute of Nuclear Chemistry, University of Mainz, Mainz, Germany
| | - Felix M Mottaghy
- Department of Nuclear Medicine, RWTH Aachen University, 52074 Aachen, Germany; Jülich/Aachen Research Alliance (JARA), Jülich/Aachen, Germany; Department of Nuclear Medicine, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands
| | - Ingo Vernaleken
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, 52074 Aachen, Germany; Jülich/Aachen Research Alliance (JARA), Jülich/Aachen, Germany
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16
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Tamang A, Ghosh SK, Garain S, Alam MM, Haeberle J, Henkel K, Schmeisser D, Mandal D. DNA-Assisted β-phase Nucleation and Alignment of Molecular Dipoles in PVDF Film: A Realization of Self-Poled Bioinspired Flexible Polymer Nanogenerator for Portable Electronic Devices. ACS Appl Mater Interfaces 2015; 7:16143-16147. [PMID: 26189605 DOI: 10.1021/acsami.5b04161] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [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: 06/04/2023]
Abstract
A flexible nanogenerator (NG) is fabricated with a poly(vinylidene fluoride) (PVDF) film, where deoxyribonucleic acid (DNA) is the agent for the electroactive β-phase nucleation. Denatured DNA is co-operating to align the molecular -CH2/-CF2 dipoles of PVDF causing piezoelectricity without electrical poling. The NG is capable of harvesting energy from a variety of easily accessible mechanical stress such as human touch, machine vibration, football juggling, and walking. The NG exhibits high piezoelectric energy conversion efficiency facilitating the instant turn-on of several green or blue light-emitting diodes. The generated energy can be used to charge capacitors providing a wide scope for the design of self-powered portable devices.
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Affiliation(s)
- Abiral Tamang
- ‡Organic Nano-Piezoelectric Device Laboratory, Department of Physics, Jadavpur University, Kolkata 700032, India
| | - Sujoy Kumar Ghosh
- ‡Organic Nano-Piezoelectric Device Laboratory, Department of Physics, Jadavpur University, Kolkata 700032, India
| | - Samiran Garain
- ‡Organic Nano-Piezoelectric Device Laboratory, Department of Physics, Jadavpur University, Kolkata 700032, India
| | - Md Mehebub Alam
- ‡Organic Nano-Piezoelectric Device Laboratory, Department of Physics, Jadavpur University, Kolkata 700032, India
| | - Jörg Haeberle
- §Angewandte Physik-Sensorik, Brandenburgische Technische Universität Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Karsten Henkel
- §Angewandte Physik-Sensorik, Brandenburgische Technische Universität Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Dieter Schmeisser
- §Angewandte Physik-Sensorik, Brandenburgische Technische Universität Cottbus-Senftenberg, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Dipankar Mandal
- ‡Organic Nano-Piezoelectric Device Laboratory, Department of Physics, Jadavpur University, Kolkata 700032, India
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Garain S, Sinha TK, Adhikary P, Henkel K, Sen S, Ram S, Sinha C, Schmeißer D, Mandal D. Self-poled transparent and flexible UV light-emitting cerium complex-PVDF composite: a high-performance nanogenerator. ACS Appl Mater Interfaces 2015; 7:1298-307. [PMID: 25523039 DOI: 10.1021/am507522r] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Cerium(III)-N,N-dimethylformamide-bisulfate [Ce(DMF)(HSO4)3] complex is doped into poly(vinylidene fluoride) (PVDF) to induce a higher yield (99%) of the electroactive phases (β- and γ-phases) of PVDF. A remarkable enhancement of the output voltage (∼32 V) of a nanogenerator (NG) based on a nonelectrically poled cerium(III) complex containing PVDF composite film is achieved by simple repeated human finger imparting, whereas neat PVDF does not show this kind of behavior. This high electrical output resembles the generation of self-poled electroactive β-phase in PVDF due to the electrostatic interactions between the fluoride of PVDF and the surface-active positive charge cloud of the cerium complex via H-bonding and/or bipolar interaction among the opposite poles of cerium complex and PVDF, respectively. The capacitor charging capability of the flexible NG promises its applicability as piezoelectric-based energy harvester. The cerium(III) complex doped PVDF composite film exhibit an intense photoluminescence in the UV region, which might be due to a participation of electron cloud from negative pole of bipolarized PVDF. This fact may open a new area for prospective development of high-performance energy-saving flexible solid-state UV light emitters.
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Affiliation(s)
- Samiran Garain
- Organic Nano-Piezoelectric Device Laboratory, Department of Physics and ‡Department of Chemistry, Inorganic Section, Jadavpur University , Kolkata 700032, India
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Mandal D, Henkel K, Schmeißer D. Improved performance of a polymer nanogenerator based on silver nanoparticles doped electrospun P(VDF–HFP) nanofibers. Phys Chem Chem Phys 2014; 16:10403-7. [DOI: 10.1039/c3cp55238a] [Citation(s) in RCA: 109] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Haeberle J, Henkel K, Gargouri H, Naumann F, Gruska B, Arens M, Tallarida M, Schmeißer D. Ellipsometry and XPS comparative studies of thermal and plasma enhanced atomic layer deposited Al2O3-films. Beilstein J Nanotechnol 2013; 4:732-742. [PMID: 24367741 PMCID: PMC3869373 DOI: 10.3762/bjnano.4.83] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Accepted: 10/23/2013] [Indexed: 05/30/2023]
Abstract
We report on results on the preparation of thin (<100 nm) aluminum oxide (Al2O3) films on silicon substrates using thermal atomic layer deposition (T-ALD) and plasma enhanced atomic layer deposition (PE-ALD) in the SENTECH SI ALD LL system. The T-ALD Al2O3 layers were deposited at 200 °C, for the PE-ALD films we varied the substrate temperature range between room temperature (rt) and 200 °C. We show data from spectroscopic ellipsometry (thickness, refractive index, growth rate) over 4" wafers and correlate them to X-ray photoelectron spectroscopy (XPS) results. The 200 °C T-ALD and PE-ALD processes yield films with similar refractive indices and with oxygen to aluminum elemental ratios very close to the stoichiometric value of 1.5. However, in both also fragments of the precursor are integrated into the film. The PE-ALD films show an increased growth rate and lower carbon contaminations. Reducing the deposition temperature down to rt leads to a higher content of carbon and CH-species. We also find a decrease of the refractive index and of the oxygen to aluminum elemental ratio as well as an increase of the growth rate whereas the homogeneity of the film growth is not influenced significantly. Initial state energy shifts in all PE-ALD samples are observed which we attribute to a net negative charge within the films.
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Affiliation(s)
- Jörg Haeberle
- Brandenburg Technical University, Applied Physics and Sensors, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Karsten Henkel
- Brandenburg Technical University, Applied Physics and Sensors, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Hassan Gargouri
- Sentech Instruments GmbH, Schwarzschildstraße 2, 12489 Berlin, Germany
| | - Franziska Naumann
- Sentech Instruments GmbH, Schwarzschildstraße 2, 12489 Berlin, Germany
| | - Bernd Gruska
- Sentech Instruments GmbH, Schwarzschildstraße 2, 12489 Berlin, Germany
| | - Michael Arens
- Sentech Instruments GmbH, Schwarzschildstraße 2, 12489 Berlin, Germany
| | - Massimo Tallarida
- Brandenburg Technical University, Applied Physics and Sensors, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
| | - Dieter Schmeißer
- Brandenburg Technical University, Applied Physics and Sensors, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany
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Paulzen M, Henkel K, Tauber S, Reich A, Eap CB, Gründer G. Plasma levels and cerebrospinal fluid penetration of venlafaxine in a patient with a non-fatal overdose during a suicide attempt. Pharmacopsychiatry 2012. [DOI: 10.1055/s-0032-1326762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Dresler T, Lürding R, Paelecke-Habermann Y, Gaul C, Henkel K, Lindwurm-Späth A, Leinisch E, Jürgens TP. Cluster headache and neuropsychological functioning. Cephalalgia 2012; 32:813-21. [PMID: 22711901 DOI: 10.1177/0333102412449931] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND Despite significant advances in unravelling the pathophysiology of cluster headache (CH), little is known about neuropsychological functioning. Apart from neuroimaging studies indicating involvement of posterior hypothalamic and other areas frequently involved in nociception, some studies suggest involvement of prefrontal areas. Among others, these mediate executive functioning (EF). METHODS Therefore, three neuropsychological tests (Trail Making Test (TMT), Go/Nogo Task and Stroop Task) were completed by four headache patient samples (chronic CH, episodic CH in the active or inactive period, and migraine patients) and compared to healthy controls. RESULTS Analyses revealed that patients especially with chronic and active episodic CH were particularly impaired in tests relying more on intact EF (i.e. TMT-B, Stroop interference) than on basal cognitive processes (i.e. TMT-A, Stroop naming). Within the CH groups performance decreased linearly with increasing severity. DISCUSSION These findings are in line with a recently proposed involvement of prefrontal structures in CH pathophysiology as patients performed worse on neuropsychological tasks relying on these structures. Impaired EF could also result from medication and sleep disturbances due to active CH. Because the decreased performance was also present outside the attacks it may hint at generally altered brain functions, but do not necessarily reflect clinically relevant behaviour.
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Affiliation(s)
- Thomas Dresler
- Department of Psychiatry and Psychotherapy, University of Tübingen, Germany
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Luerding R, Henkel K, Gaul C, Dresler T, Lindwurm A, Paelecke-Habermann Y, Leinisch E, Jürgens TP. Aggressiveness in different presentations of cluster headache: Results from a controlled multicentric study. Cephalalgia 2012; 32:528-36. [DOI: 10.1177/0333102412443336] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Background: The hypothalamus has been discussed as a pivotal structure for both cluster headache (CH) and aggressiveness, but little is known about the extent of self-reported aggressiveness in patients with CH. Patients and methods: Twenty-six patients with chronic, 25 with active episodic and 22 with episodic CH outside the active period were examined interictally with a validated questionnaire quantifying factors of aggression and compared with 24 migraine patients and 31 headache-free volunteers. Results: The ANOVA was significant for the subscale ‘self-aggression/depression’ ( F4, 123 = 5.771, p < 0.001) with significant differences between chronic and episodic CH and healthy volunteers. No significant changes were found for other subscales and the sum scale ( F4, 123 < 1.421, p > 0.230). Especially in the clinically most affected group of patients (chronic CH and active episodic CH), high levels of “self-aggression/depression” correlate with higher prevalence of depressive symptoms and higher impairment measured on an emotional and functional level. Discussion: Self-aggressive and depressive cognitions with highest scores in chronic CH seem to be reactive as they correlate with depressive symptoms and impairment. They should be considered as an important therapeutic target since they impair the patient’s life significantly.
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Affiliation(s)
| | - Karsten Henkel
- Kiel Headache Center, Germany
- RWTH Aachen University, Germany
| | - Charly Gaul
- University of Halle, Germany
- University of Essen, Germany
| | | | | | | | - Elke Leinisch
- University of Regensburg, Germany
- Helios Klinikum, Erfurt, Germany
| | - Tim P Jürgens
- University Medical Center Hamburg-Eppendorf, Germany
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Mandal D, Henkel K, Schmeisser D. Comment on “Preparation and Characterization of Silver–Poly(vinylidene fluoride) Nanocomposites: Formation of Piezoelectric Polymorph of Poly(vinylidene fluoride)”. J Phys Chem B 2011; 115:10567-9. [DOI: 10.1021/jp201335j] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Dipankar Mandal
- Department of Physics, Jadavpur University, Kolkata 700032, India.
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Jürgens TP, Gaul C, Lindwurm A, Dresler T, Paelecke-Habermann Y, Schmidt-Wilcke T, Lürding R, Henkel K, Leinisch E. Impairment in episodic and chronic cluster headache. Cephalalgia 2010; 31:671-82. [DOI: 10.1177/0333102410391489] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Despite being an excruciating headache, little is known about the burden of cluster headache (CH) regarding its various subtypes. In a multicentre, prospective study, patients with chronic CH ( n = 27), with episodic CH in the active ( n = 26) and outside the active period ( n = 22), migraine patients ( n = 24) and healthy controls ( n = 31) were included. Epidemiological data, the German version of the Headache Disability Inventory (HDI) and a screening for psychiatric complaints were applied. About 25% of chronic CH patients in our study received invalidity allowance due to CH. HDI scores (total and subscales emotion and function) indicated a severe headache-specific disability (one-way ANOVA: P < 0.01). Patients with chronic and active episodic CH were significantly more affected than patients with inactive CH and migraine. Healthy volunteers were significantly less affected than all headache patients. Symptoms suggestive of psychiatric co-morbidity were found predominantly in chronic CH: depressive symptoms (56%), signs of agoraphobia (33%) and suicidal tendencies (25%) were frequently reported. Patients with chronic and active episodic CH were severely impaired in non-economic and economic domains such as disability, working life and psychiatric complaints. Remarkably, psychiatric co-morbidity was highest in chronic CH. Thus, especially chronic CH warrants special medical and further supportive care.
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Affiliation(s)
- Tim P Jürgens
- Department of Neurology, University of Regensburg, Germany
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Germany
- Tim P. Jürgens and Charly Gaul contributed equally to this work
| | - Charly Gaul
- Department of Neurology, University of Halle, Germany
- Department of Neurology, University of Essen, Germany
- Tim P. Jürgens and Charly Gaul contributed equally to this work
| | | | - Thomas Dresler
- Department of Psychiatry, Psychosomatics and Psychotherapy, University of Würzburg, Germany
| | | | | | - Ralf Lürding
- Department of Neurology, University of Regensburg, Germany
| | - Karsten Henkel
- Kiel Headache Centre, Kiel, Germany
- Department of Psychiatry and Psychotherapy, RWTH Aachen University, Germany
| | - Elke Leinisch
- Department of Neurology, University of Regensburg, Germany
- Department of Neurology, Helios Klinikum, Erfurt, Germany
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Göbel H, Heinze A, Heinze-Kuhn K, Henkel K, Roth A, Rüschmann HH. [Development and implementation of integrated health care in pain medicine : the nationwide German headache treatment network]. Schmerz 2010; 23:653-70. [PMID: 19921280 DOI: 10.1007/s00482-009-0857-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Integrated care builds interdisciplinary networks across the different healthcare sectors. A conjoint effort toward clearly defined treatment goals is crucial for medically effective and economically efficient care. Allowing creativity in the implementation of integrated care triggers competition for more effective ideas and better solutions. Based on a summary of the development of integrated care and the example of the nationwide German headache treatment network, the successful organization and implementation of this cross-sectoral care within pain medicine is illustrated. An interdisciplinary nationwide network of pain therapists working hand in hand across the sectors, both in the outpatient and inpatient setting, and employing modern treatment regimens results in optimal pain relief. The treatment quality is assessed by continuous accompanying research and sustainable cost efficiency in all sectors of healthcare is confirmed through analysis of both direct and indirect costs. The project was started in May 2007. In the meantime, almost all large statutory health insurance providers in Germany have joined this healthcare project. The large treatment network confirms the significant clinical and economic efficiency of pain medicine. It demonstrates that coordinated modern therapy effectively relieves pain, lowers costs sustainably, and reduces sick leave. Patient satisfaction is very high. The healthcare providers may directly participate in treatment success through risk-sharing.
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Affiliation(s)
- H Göbel
- Neurologisch-verhaltensmedizinische Schmerzklinik, Heikendorfer Weg 9-27, 24149, Kiel, Deutschland.
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Müller K, Bär W, Henkel K, Jahnke A, Schwiertz C, Schmeißer D. Organische Feldeffekttransistoren als Transducer in der Biosensorik (Organic Field Effect Transistors as Biosensors). ACTA ACUST UNITED AC 2009. [DOI: 10.1524/teme.70.12.565.20261] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Abstract
In diesem Beitrag wird der Einsatz neuartiger Sensortypen für die medizinische Diagnostik beschrieben. Diese Sensoren sollen komplett organisch sein und auf dem Prinzip des Feldeffekttransistors basieren. Als Modellsystem für die Anwendung in der Biosensorik soll die Einsatzmöglichkeit dieser Sensoren in der nicht-invasiven Diagnostik der Helicobacter-pylori-Infektion überprüft werden.
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Gupta S, Anderson C, Henkel K, Garg N. 60: The Prevalence of Tobacco and Alcohol Use in Immigrant Emergency Department Patients in Queens, NY. Ann Emerg Med 2009. [DOI: 10.1016/j.annemergmed.2009.06.081] [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: 10/20/2022]
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Gaul C, Eismann R, Schmidt T, May A, Leinisch E, Wieser T, Evers S, Henkel K, Franz G, Zierz S. Use of complementary and alternative medicine in patients suffering from primary headache disorders. Cephalalgia 2009; 29:1069-78. [PMID: 19366356 DOI: 10.1111/j.1468-2982.2009.01841.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Complementary and alternative medicine (CAM) is increasingly common in the treatment of primary headache disorders despite lack of evidence for efficacy in most modalities. A systematic questionnaire-based survey of CAM therapy was conducted in 432 patients who attended seven tertiary headache out-patient clinics in Germany and Austria. Use of CAM was reported by the majority (81.7%) of patients. Most frequently used CAM treatments were acupuncture (58.3%), massage (46.1%) and relaxation techniques (42.4%). Use was motivated by 'to leave nothing undone' (63.7%) and 'to be active against the disease' (55.6%). Compared with non-users, CAM users were of higher age, showed a longer duration of disease, a higher percentage of chronification, less intensity of headache, were more satisfied with conventional prophylaxis and showed greater willingness to gather information about headaches. There were no differences with respect to gender, headache diagnoses, headache-specific disability, education, income, religious attitudes or satisfaction with conventional attack therapy. A higher number of headache days, longer duration of headache treatment, higher personal costs, and use of CAM for other diseases predicted a higher number of used CAM treatments. This study confirms that CAM is widely used among primary headache patients, mostly in combination with standard care.
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Affiliation(s)
- C Gaul
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle, Germany.
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Mosges R, Meinke M, Lintermann A, Henkel K, Wein B. 3D-visualization Of The Nasal Flow After Allergen Challenge And The Effect Of Mometasone Furoate Nasal Spray (MFNS). J Allergy Clin Immunol 2009. [DOI: 10.1016/j.jaci.2008.12.499] [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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Henkel K, Nau R, Spreer A. Diagnostische Bedeutung der intrathekalen Synthese von gegen Varizella-Zoster-Virus gerichteten Antikörpern und Ätiologie der peripheren Fazialisparese: eine retrospektive Studie. Akt Neurol 2008. [DOI: 10.1055/s-0028-1086481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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31
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Göbel H, Henkel K, Ufer C, Heinze-Kuhn K, Heinze A. Einnahme von mehreren Wirkstoffen in freier oder fixer Kombination sowie ein zunehmender Anstieg der Attackenfrequenz sind wesentliche Risikofaktoren für Kopfschmerz bei Medikamentenübergebrauch als Komplikation der Migränetherapie. Akt Neurol 2008. [DOI: 10.1055/s-0028-1086942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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32
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Henkel K, Heinze A, Heinze-Kuhn K, Ufer C, Baum S, Göbel H. Prednisolon ist in der Therapie von Kopfschmerz durch Medikamentenübergebrauch bei zugrundeliegender Migräne, nicht aber bei Kopfschmerz vom Spannungstyp, wirksam. Akt Neurol 2008. [DOI: 10.1055/s-0028-1086738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Henkel K, Danek A, Grafman J, Butman J, Kassubek J. Head of the caudate nucleus is most vulnerable in chorea-acanthocytosis: a voxel-based morphometry study. Mov Disord 2007; 21:1728-31. [PMID: 16874760 DOI: 10.1002/mds.21046] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Chorea-acanthocytosis (ChAc; OMIM 200150) is a rare autosomal recessive disease with dysfunction of the erythrocyte membrane, presenting with acanthocytes and neurological manifestations characterized by progressive hyperkinesias (chorea, dystonia) and neuropsychological impairment. Damage to the basal ganglia was described previously in neuropathological and neuroimaging investigations. We analyzed high-resolution MRI of six ChAc patients with mutations in the VPS13A gene (median age, 37 years; mean time since clinical onset, 13 years) with respect to regional atrophy by use of the observer-independent technique of voxel-based morphometry in comparison to 15 age-matched healthy controls. Additionally, global brain atrophy was determined using the standardized brain parenchymal fraction (BPF) method. A robust regional reduction of gray matter density was observed in the head of the caudate nucleus bilaterally and was nearly symmetrical (P < 0.001, corrected for small volumes). No additional gray matter changes were found. In the BPF analysis, there was no significant global brain atrophy. The predilection of atrophy in the head of the caudate nucleus, as suggested by our results, argues for a particular vulnerability of this part of the striatum in ChAc and is in agreement with pronounced neuropsychological disturbances that are thought to rely on these regions.
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Affiliation(s)
- Karsten Henkel
- Department of Neurology, University of Ulm, Ulm, Germany.
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Spang C, Zimmermann B, Jacoby U, Diehl T, Lenschow U, Uhlemann M, Plath C, Stuhldreier G, Henkel K. Differentialdiagnose eines cervicalen Tumors – Teratom. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-946141] [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: 10/19/2022]
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Müller K, Paloumpa I, Henkel K, Schmeißer D. Organic thin film transistors with polymer high-k dielectric insulator. Materials Science and Engineering: C 2006. [DOI: 10.1016/j.msec.2005.09.057] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Torche M, Henkel K, Schmeißer D. The interaction of Al, Ag, Au, and Ti to Pr2O3 thin film dielectrics. Materials Science and Engineering: C 2006. [DOI: 10.1016/j.msec.2005.09.077] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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37
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Spang C, Zimmermann B, Jacoby U, Diehl T, Lenschow U, Uhlemann M, Plath C, Stuhldreier G, Henkel K. Differentialdiagnose eines cervicalen Tumors – Teratom. Z Geburtshilfe Neonatol 2006. [DOI: 10.1055/s-2006-943226] [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: 10/19/2022]
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38
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Lorch B, Henkel K, Schaab H, Aurnhammer W, Becker T. [Polycystic lipomembranous osteodysplasia with sclerosing leukoencephalopathy]. Nervenarzt 2006; 77:85-90. [PMID: 15986257 DOI: 10.1007/s00115-005-1953-2] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A 32-year-old patient presented with presenile dementia syndrome and complex-partial seizures. The dementia was preceded by recurrent bone pain which led to surgical intervention for ossear cysts. Computed tomography revealed intracerebral calcification and marked brain atrophy. Clinical, radiological, genetic, and histopathological features of PLOSL disease are discussed in the differential diagnosis of presenile dementia and basal ganglia calcification.
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Affiliation(s)
- B Lorch
- Klinik für Psychiatrie, Psychotherapie und Psychosomatik, Abteilung Psychiatrie II der Universität Ulm am BKH Günzburg.
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Gaul C, Nebel R, Wieser T, Evers S, Leinisch E, May A, Henkel K, Kropp P, Zierz S. Inanspruchnahme komplementärmedizinischer Verfahren durch Kopfschmerzpatienten. Akt Neurol 2006. [DOI: 10.1055/s-2006-953096] [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: 10/20/2022]
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40
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Kurt A, Kühnlein P, Henkel K, Sperfeld A, Ludolph A. Effektivität der nichtinvasiven intermittierenden Maskenheimbeatmung (NIPPV) bei Patienten mit amyotropher Lateralsklerose. Akt Neurol 2005. [DOI: 10.1055/s-2005-919711] [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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41
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Henkel K, Danek A, Grafman J, Kassubek J. Voxel-basierte Morphometrie bei Chorea-Akanthozytose. Akt Neurol 2005. [DOI: 10.1055/s-2005-919291] [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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Hermann RM, Henkel K, Christiansen H, Vorwerk H, Hille A, Hess CF, Schmidberger H. Testicular dose and hormonal changes after radiotherapy of rectal cancer. Radiother Oncol 2005; 75:83-8. [PMID: 15878105 DOI: 10.1016/j.radonc.2004.12.017] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2004] [Revised: 11/08/2004] [Accepted: 12/10/2004] [Indexed: 10/25/2022]
Abstract
BACKGROUND AND PURPOSE To measure the dose received by the testicles during radiotherapy for rectal cancer and to determine the contribution of each field of the pelvic box and the relevance for hormonal status. MATERIALS AND METHODS In 11 patients (mean age 55.2 years) testicular doses were measured with an ionisation chamber between 7 and 10 times during the course of pelvic radiotherapy (50 Gy) for rectal carcinoma. Before and several months after radiotherapy luteinizing hormone, follicle stimulating hormone and total testosterone serum levels were determined. RESULTS The mean cumulative radiation exposure to the testicles was 3.56 Gy (0.7-8.4 Gy; 7.1% of the prescribed dose). Seventy-three percent received more than 2 Gy to the testicles. Fifty-eight percent of the measured dose was contributed by the p.a. field, 30% by the a.p. field and 12% by the lateral fields. Mean LH and FSH levels were significantly increased after therapy (350%/185% of the pre-treatment values), testosterone levels decreased to 78%. No correlation could be found between changes of hormones and doses to the testis, probably due to the low number of evaluated patients. CONCLUSIONS Radiotherapy of rectal carcinoma causes significant damage to the testis, as shown by increased levels of gonadotropins after radiotherapy. Most of the gonadal dose is delivered by the p.a. field, due to the divergence of the p.a. beam towards the testicles. The reduction in testosterone level may be of clinical concern. Patients who will receive radiotherapy for rectal carcinoma must be instructed about a high risk of permanent infertility, and the risk of endocrine failure (hypogonadism). Larger studies are needed to establish the correlation between testicular radiation dose and hormonal changes in this group of patients.
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Affiliation(s)
- Robert M Hermann
- Department of Radiation Oncology and Radiotherapy, Georg-August-Universität Göttingen, Germany
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Henkel K, Bengel D. [Crossed central neuropathic pain syndrome after bacterial meningoencephalitis]. Schmerz 2005; 19:55-8. [PMID: 15712006 DOI: 10.1007/s00482-004-0312-8] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We report on a 48 year old female patient who acquired a bacterial meningoencephalitis as a result of a cervical myelography. Examination of the cerebrospinal fluid (CSF) revealed 309 cells per microliter and Streptococcus acidominimus was isolated as the infectious agent. Cranial MRI demonstrated disseminated lesions predominantly in the pontine and medullary brain stem as well as in thalamic nuclei. The patient developed a crossed central neuropathic pain syndrome. Neurological examination showed mechanic allodynia and hyperpathy along the left-sided extremities as well as right-sided neuropathic facial pain. On the MRI a dorsolateral medullary lesion on the right side, in the territory of the posterior inferior cerebellar artery was found. The localization of the lesion is suggestive of involvement of the spinal trigeminal tract or nucleus and the spinothalamic tract that would explain the neuropathic pain syndrome.A combination of gabapentine and amitriptyline reduced the pain markedly whereas opioids failed to provide sufficient analgesia.
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Affiliation(s)
- K Henkel
- Neurologische Poliklinik, Universität Ulm
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Henkel K, Karitzky J, Schmid M, Mader I, Glatting G, Unger JW, Neumaier B, Ludolph AC, Reske SN, Landwehrmeyer GB. Imaging of activated microglia with PET and [11C]PK 11195 in corticobasal degeneration. Mov Disord 2004; 19:817-821. [PMID: 15254941 DOI: 10.1002/mds.20040] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Positron emission tomography (PET) using [(11)C]PK 11195, a ligand for peripheral benzodiazepine receptor binding sites, offers the opportunity to image activated microglia in vivo. This tool may therefore be used to display the occurrence of microglial activation in the course of neurodegeneration. A patient with the clinical diagnosis of corticobasal degeneration (CBD) and left-sided symptoms was studied using fluorodeoxyglucose (FDG) and [(11)C]PK 11195 PET. We found a marked right hemispheric hypometabolism and asymmetric microglial activation in corresponding areas of the basal ganglia and right temporal and parietal cortex. [(11)C]PK 11195 PET suggests involvement of microglial activation in the pathogenesis of CBD.
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Affiliation(s)
- Karsten Henkel
- Department of Neurology, University of Ulm, Ulm, Germany
- Department of Nuclear Medicine, University of Ulm, Ulm, Germany
| | - Jochen Karitzky
- Department of Neurology, University of Ulm, Ulm, Germany
- Department of Nuclear Medicine, University of Ulm, Ulm, Germany
| | - Michaela Schmid
- Department of Nuclear Medicine, University of Ulm, Ulm, Germany
| | - Irina Mader
- Department of Neuroradiology, University of Tübingen, Tübingen, Germany
| | | | - Jürgen W Unger
- Department of Neurology, University of Ulm, Ulm, Germany
| | - Bernd Neumaier
- Department of Nuclear Medicine, University of Ulm, Ulm, Germany
| | | | - Sven N Reske
- Department of Nuclear Medicine, University of Ulm, Ulm, Germany
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Jünemann A, Bleich S, Reulbach U, Henkel K, Wakili N, Beck G, Rautenstrauss B, Mardin C, Naumann GOH, Reis A, Kornhuber J. Prospective case control study on genetic assocation of apolipoprotein epsilon2 with intraocular pressure. Br J Ophthalmol 2004; 88:581-2. [PMID: 15031182 PMCID: PMC1772093 DOI: 10.1136/bjo.2003.020305] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kassubek J, Juengling FD, Kioschies T, Henkel K, Karitzky J, Kramer B, Ecker D, Andrich J, Saft C, Kraus P, Aschoff AJ, Ludolph AC, Landwehrmeyer GB. Topography of cerebral atrophy in early Huntington's disease: a voxel based morphometric MRI study. J Neurol Neurosurg Psychiatry 2004; 75:213-20. [PMID: 14742591 PMCID: PMC1738932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
OBJECTIVES To analyse grey matter changes in early stages of Huntington's disease using magnetic resonance imaging (MRI) and the technique of voxel based morphometry (VBM). METHODS Forty four patients with a molecularly confirmed clinical diagnosis of Huntington's disease based on the presence of motor signs were included in the study. Patients were clinically rated using the Unified Huntington's Disease Rating Scale; all were in early clinical stages of the disease (that is, Shoulson stages I and II). High resolution volume rendering MRI scans (MP-RAGE) were acquired. MRI data were volumetrically analysed in comparison to an age matched normal database by VBM, using statistical parametric mapping (SPM99). RESULTS In Huntington's disease, robust regional decreases in grey matter density (p<0.001, corrected for multiple comparisons)-that is, atrophy-were found bilaterally in striatal areas as well as in the hypothalamus and the opercular cortex, and unilaterally in the right paracentral lobule. The topography of striatal changes corresponded to the dorso-ventral gradient of neuronal loss described in neuropathological studies. Stratification according to clinical severity showed a more widespread involvement extending into the ventral aspects of the striatum in the group of more severely affected patients. CONCLUSIONS The topography of cerebral volume changes associated with Huntington's disease can be mapped using VBM. It can be shown that cerebral grey matter changes co-vary with clinical severity and CAG repeat length.
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Affiliation(s)
- J Kassubek
- Department of Neurology, University of Ulm, Ulm, Germany.
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Goryachko A, Yeromenko Y, Henkel K, Wollweber J, Schmei�er D. The Si(001)/C2H2 interaction to form a buffer layer for 3C-SiC growth. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/pssa.200303914] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Henkel K, Grasbon-Frodl EM, Mottaghy FM, Ethofer T, Uttner I, Zerr I, Reske SN, Kretzschmar HA, Ludolph AC, Bengel D. Atypische hereditäre Creutzfeldt-Jakob-Krankheit (CJD) - diagnostische Relevanz von FDG-PET und MR-Spektroskopie. Akt Neurol 2004. [DOI: 10.1055/s-2004-833256] [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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Henkel K, Schmeisser D. Back-propagation-based neural network with a two sensor system for monitoring carbon dioxide and relative humidity. Anal Bioanal Chem 2002; 374:329-37. [PMID: 12324857 DOI: 10.1007/s00216-002-1471-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2002] [Revised: 06/19/2002] [Accepted: 06/25/2002] [Indexed: 10/27/2022]
Abstract
The delicate problem of independently determining the concentration of carbon dioxide and relative humidity in a gas mixture is solved by recording the signals of two quartz microbalances coated with a functionalized sensitive polymer layer. The data were analysed by back-propagation-based neural networks. We tested two different architectures, a one-stage net and a two-stage net (which consist of two network structures in series) with respect to their generalisation ability. The one-stage network calculated the concentration of carbon dioxide with an error less than 12% and that of relative humidity with an error less than 5%. The two-stage network recognised in the first step seven categories of relative humidity with a success rate of 100%, while the maximal error of carbon dioxide concentration calculated in the second level of this architecture is reduced to 9%. In addition, the generalisation ability of the two-stage network is improved compared to the one-stage network.
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Affiliation(s)
- K Henkel
- Angewandte Physik - Sensorik, Brandenburgische Technische Universität Cottbus, Postfach 101344, Germany.
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Henkel K, Zerr I, Hertel A, Gratz KF, Schröter A, Tschampa HJ, Bihl H, Büll U, Grünwald F, Drzezga A, Spitz J, Poser S. Positron emission tomography with [(18)F]FDG in the diagnosis of Creutzfeldt-Jakob disease (CJD). J Neurol 2002; 249:699-705. [PMID: 12111302 DOI: 10.1007/s00415-002-0695-3] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The aim of this study was to explore the sites of metabolic changes with [(18)F]2-fluoro-2-desoxy-D-glucose (FDG) and positron emission tomography (PET) in patients with Creutzfeldt-Jakob disease and to correlate the findings with clinical symptoms. Static [(18)F]FDG-PET studies of eight patients with the diagnosis of confirmed or probable CJD were retrospectively analysed by two physicians from departments of nuclear medicine independently with a strong interrater agreement (kappa=0,98). The clinical data of the patients, based on a standardized evaluation by physicians from the German Creutzfeldt-Jakob disease surveillance study, was correlated with the PET findings. [(18)F]FDG-PET shows widespread hypometabolism in CJD. All patients had a reduction of cerebral glucose metabolism in at least one temporal or parietal region. Additionally in 7 of our own 8 cases and 3 of 4 cases from the literature the occipital lobe, the cerebellum or the basal ganglia were involved. These findings differ from typical patterns of hypometabolism in Alzheimer's disease and other neurodegenerative disorders. In two thirds of the cases the distribution was markedly asymmetric. Myoclonus was present in five out of our eight own cases. Our data suggest that myoclonus might correlate with metabolic impairment of contralateral parietal and temporal lobes. In three of four patients with visual symptoms FDG uptake was reduced in the visual cortex bilaterally. Typical hyperintensities on MRI were only found in two of the eight cases at the time of PET-studies. Our results demonstrate that [(18)F]FDG-PET appears to be a sensitive investigation in CJD and could be useful to differentiate CJD from other neurodegenerative disorders.
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Affiliation(s)
- Karsten Henkel
- Prionforschungsgruppe, Department of Neurology, University of Göttingen, Robert-Koch-Strasse 40, 37075 Göttingen, Germany
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