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Lucuta L, Maas-Gramlich A, Kraemer M, Andresen-Streichert H, Juebner M. Ketamine in DUID cases in the greater Cologne area. Forensic Sci Int 2024; 354:111905. [PMID: 38064774 DOI: 10.1016/j.forsciint.2023.111905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 11/20/2023] [Accepted: 12/01/2023] [Indexed: 01/12/2024]
Abstract
INTRODUCTION Ketamine is primarily used as an anaesthetic or for analgesics in medical treatment, but due to its dissociative and hallucinogenic effects, abuse has increased in the past years leading to several drug impaired driving cases. METHODS Eight DUID (driving under the influence of drugs) cases involving ketamine from two institutes of legal medicine over a period from January 2021 to January 2023 were evaluated. The cases were compared with regard to psychomotor impairments, adverse effects on driving performance and co-consumption of drugs. Analyses of ketamine were carried out by high performance liquid chromatography with diode array detection (HPLC-DAD). Other drugs of abuse were either detected via liquid chromatography with tandem mass spectromety (LC-MS/MS) and/or gas chromatography with (tandem) mass spectrometry (GC-MS(/MS)). RESULTS Ketamine plasma concentrations in a range of approx. 100-1200 ng/mL (mean: 510 ng/mL, median: 370 ng/mL) were detected. Co-consumption of at least one substance was ascertained in all cases. Besides driving impairments, recorded psychomotor impairments of the drivers comprised e.g. dilated pupils, missing or delayed pupil reactions, a slurred or decelerated speech, delayed reaction, lack of concentration, vertigo or agitation. DISCUSSION The observed peculiarities were in-line with literature data. However, the assessment and differentiation of ketamine-induced impairments was aggravated due to co-consumption of other drugs of abuse or pharmaceuticals in the herein investigated cases. Nevertheless, in two cases impairments can be attributed mainly to ketamine consumption since the co-consumed substances were only detected in low concentrations. CONCLUSION The presented cases provide additional data on psychomotor impairments observed in ketamine-related DUID cases. Limiting factors are co-consumption of substances, unknown habituation to drugs and the limited case number. Nevertheless, the results of this study are comparable with existing literature data. Since the abuse of ketamine has increased in the past years, these data will support forensic casework.
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Affiliation(s)
- L Lucuta
- Department of Toxicology, Institute of Legal Medicine, University of Cologne, Faculty of Medicine and University Hospital, Cologne, Germany.
| | - A Maas-Gramlich
- Institute of Forensic Medicine, Forensic Toxicology, University Hospital Bonn, Bonn, Germany
| | - M Kraemer
- Institute of Forensic Medicine, Forensic Toxicology, University Hospital Bonn, Bonn, Germany
| | - H Andresen-Streichert
- Department of Toxicology, Institute of Legal Medicine, University of Cologne, Faculty of Medicine and University Hospital, Cologne, Germany
| | - M Juebner
- Department of Toxicology, Institute of Legal Medicine, University of Cologne, Faculty of Medicine and University Hospital, Cologne, Germany
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Van Hoose PM, Yang L, Kraemer M, Ubele M, Morris AJ, Smyth SS. Lipid phosphate phosphatase 3 in smooth muscle cells regulates angiotensin II-induced abdominal aortic aneurysm formation. Sci Rep 2022; 12:5664. [PMID: 35383201 PMCID: PMC8983654 DOI: 10.1038/s41598-022-08422-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 12/10/2021] [Indexed: 01/28/2023] Open
Abstract
Genetic variants that regulate lipid phosphate phosphatase 3 (LPP3) expression are risk factors for the development of atherosclerotic cardiovascular disease. LPP3 is dynamically upregulated in the context of vascular inflammation with particularly heightened expression in smooth muscle cells (SMC), however, the impact of LPP3 on vascular pathology is not fully understood. We investigated the role of LPP3 and lysophospholipid signaling in a well-defined model of pathologic aortic injury and observed Angiotensin II (Ang II) increases expression of PLPP3 in SMCs through nuclear factor kappa B (NF-κB) signaling Plpp3 global reduction (Plpp3+/-) or SMC-specific deletion (SM22-Δ) protects hyperlipidemic mice from AngII-mediated aneurysm formation. LPP3 expression regulates SMC differentiation state and lowering LPP3 levels promotes a fibroblast-like phenotype. Decreased inactivation of bioactive lysophosphatidic acid (LPA) in settings of LPP3 deficiency may underlie these phenotypes because deletion of LPA receptor 4 in mice promotes early aortic dilation and rupture in response to AngII. LPP3 expression and LPA signaling influence SMC and vessel wall responses that are important for aortic dissection and aneurysm formation. These findings could have important implications for therapeutics targeting LPA metabolism and signaling in ongoing clinical trials.
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Affiliation(s)
- Patrick M. Van Hoose
- grid.266539.d0000 0004 1936 8438Gill Heart and Vascular Institute, University of Kentucky, 741 South Limestone BBSRB, Rm: B347, Lexington, KY 40536-0509 USA
| | - Liping Yang
- grid.266539.d0000 0004 1936 8438Gill Heart and Vascular Institute, University of Kentucky, 741 South Limestone BBSRB, Rm: B347, Lexington, KY 40536-0509 USA
| | - Maria Kraemer
- grid.266539.d0000 0004 1936 8438Gill Heart and Vascular Institute, University of Kentucky, 741 South Limestone BBSRB, Rm: B347, Lexington, KY 40536-0509 USA
| | - Margo Ubele
- grid.266539.d0000 0004 1936 8438Gill Heart and Vascular Institute, University of Kentucky, 741 South Limestone BBSRB, Rm: B347, Lexington, KY 40536-0509 USA
| | - Andrew J. Morris
- grid.266539.d0000 0004 1936 8438Gill Heart and Vascular Institute, University of Kentucky, 741 South Limestone BBSRB, Rm: B347, Lexington, KY 40536-0509 USA ,Lexington Veterans Affair Medical Center, Lexington, KY USA
| | - Susan S. Smyth
- grid.266539.d0000 0004 1936 8438Gill Heart and Vascular Institute, University of Kentucky, 741 South Limestone BBSRB, Rm: B347, Lexington, KY 40536-0509 USA ,Lexington Veterans Affair Medical Center, Lexington, KY USA
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Camazzola G, Boscolo D, Scifoni E, Durante M, Kraemer M, Fuss M. CURRENT STATUS OF THE TRAX-CHEM EXTENSION TO THE HOMOGENEOUS CHEMICAL STAGE. Phys Med 2022. [DOI: 10.1016/s1120-1797(22)01640-4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Mokry C, Warnke C, Gehring K, Hegen H, Salmen A, Kraemer M, Kleiter I, Fasshauer E, Scheiderbauer J, Lühmann D, Köpke S, Berthele A, Heesen C. Implementation study of the 2021 German guideline for diagnosis and treatment of multiple sclerosis. Mult Scler Relat Disord 2021; 57:103434. [PMID: 34920249 DOI: 10.1016/j.msard.2021.103434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/19/2021] [Accepted: 11/27/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND In May 2021, a new guideline on the diagnosis and treatment of multiple sclerosis and related disorders was released in Germany. Since the success of a guideline depends on how it integrates into everyday clinical practice, the German Society for Neurology (DGN) has launched a multimethod implementation project. Here we report on the results based on the consultation version of the guideline. METHODS We used qualitative and quantitative data analyses to capture the nature and extent of barriers and facilitating factors to the implementation. We centered on the guideline's chapter A on diagnosis, relapse therapy, and immunotherapy of multiple sclerosis. We performed nine online focus group discussions and a web-based survey and analyzed emails and letters with comments from stakeholders and independent parties that were sent spontaneously or by invitation. RESULTS 94 neurologists answered the survey, and ≥70% agreed with the recommendations of the guideline on each major content topic. Barriers to implementation were detected in group discussions and written input. The most controversial issues of the guideline were "early treatment", "criteria for starting or switching therapy", "stepwise escalation versus early aggressive treatment", "classification of drugs into three categories of efficacy" and the scenarios on "treatment cessation". Some appreciated the highly structured recommendations, but others felt that the guideline restricts the free choice of therapy, or they were afraid of recourse claims. Some considered the guideline as too cautious regarding treatment initiation, possibly delaying necessary therapies. Others appreciated that conflicts of interests of the guideline's authoring group were minimized and thought that the new guideline is clearer, more extensive and practical. CONCLUSION In contrast to the survey, feedback in the focus group discussions and from individuals was diverse and sometimes more critical. Based on the overall feedback rate of about 250 people in relation to the number of 6500 board-certified neurologists in Germany, the overall appreciation of the guideline can only be considered as an indicator and not proof of acceptance. Results of this analysis were incorporated into several adjustments to the final guideline of 2021. Since the guideline is to be updated regularly under the auspices of a "living guideline", active interaction with users will continue to matter and help to improve it.
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Affiliation(s)
- C Mokry
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute of Neuroimmunology and Multiple Sclerosis (INIMS), University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - C Warnke
- Department of Neurology, Faculty of Medicine and University Hospital Cologne, University of Cologne, Cologne, Germany
| | - K Gehring
- Neurocentre at Klosterforst, Itzehoe, Germany
| | - H Hegen
- Department of Neurology, Medical University of Innsbruck, Innsbruck, Austria
| | - A Salmen
- Department of Neurology, Inselspital, Bern University Hospital, Bern, Switzerland
| | - M Kraemer
- Department of Neurology, Alfried Krupp Hospital Essen, Essen, Germany; Department of Neurology, Medical Faculty, Heinrich Heine University Duesseldorf, Duesseldorf, Germany
| | - I Kleiter
- Marianne-Strauß-Klinik, Behandlungszentrum Kempfenhausen für Multiple Sklerose Kranke gemeinnützige GmbH, Germany
| | - E Fasshauer
- German Multiple Sclerosis Society (DMSG), Bundesverband e.V., Hannover, Germany
| | - J Scheiderbauer
- Stiftung für Selbstbestimmung und Selbstvertretung von MS-Betroffene, Trier, Germany
| | - D Lühmann
- Department of Family medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - S Köpke
- Department for Nursing Sciences, Medical Faculty, University of Cologne, Cologne, Germany
| | - A Berthele
- School of Medicine, Dept. Of Neurology, Technical University Munich, Klinikum rechts der Isar, Munich, Germany
| | - C Heesen
- Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany; Institute of Neuroimmunology and Multiple Sclerosis (INIMS), University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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Colombi S, Rovituso M, Scifoni E, Schuy C, Eichhorn A, Kraemer M, Durante M, La Tessa C. Interaction of therapeutic 12C ions with bone-like targets: physical characterization and dosimetric effect at material interfaces. Phys Med Biol 2021; 66. [PMID: 34438376 DOI: 10.1088/1361-6560/ac215f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 08/26/2021] [Indexed: 11/11/2022]
Abstract
Carbon therapy is a promising treatment option for cancer. The physical and biological properties of carbon ions can theoretically allow for the delivery of curative doses to the tumor, while simultaneously limiting risks of toxicity to adjacent healthy structures. The treatment effectiveness can be further improved by decreasing the uncertainties stemming from several sources, including the modeling of tissue heterogeneity. Current treatment plans employ density-based conversion methods to translate patient-specific anatomy into a water system, where dose distribution is calculated. This approach neglects differences in nuclear interactions stemming from the elemental composition of each tissue. In this work, we investigated the interaction of therapeutic carbon ions with bone-like materials. The study concentrated on nuclear interactions and included attenuation curves of 200 and 400 AMeV beams in different types of bones, as well as kinetic energy spectra of all charged fragments produced up to 29 degrees from the beam direction. The comparison between measurements and calculations of the treatment planning system TRiP98 indicated that bone tissue causes less fragmentation of carbon ions than water. Overall, hydrogen and helium particles were found to be the most abundant species, while heavier fragments were mostly detected within 5 degrees from the beam direction. We also investigated how the presence of a soft tissue-bone interface could affect the depth-dose profile. The results revealed a dose spike in the transition region, that extended from the entry channel to the target volume. The findings of this work indicated that the tissue-to-water conversion method based only on density considerations can result in dose inaccuracies. Tissue heterogeneity regions containing bones can potentially produce dose spikes, whose magnitude will depend on the patient anatomy. Dose uncertainties can be decreased by modeling nuclear interactions directly in bones, without applying the tissue-to-water conversion.
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Affiliation(s)
- S Colombi
- University of Trento, Via Sommarive 14, I-38123 Trento, Italy.,Trento Institute of Fundamental Physics and Applications (TIFPA), Via Sommarive 14, I-38123 Trento, Italy
| | - M Rovituso
- HollandPTC Proton Therapy Center, Delft, The Netherlands
| | - E Scifoni
- Trento Institute of Fundamental Physics and Applications (TIFPA), Via Sommarive 14, I-38123 Trento, Italy
| | - C Schuy
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany
| | | | - M Kraemer
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany
| | - M Durante
- GSI Helmholtzzentrum für Schwerionenforschung, Planckstrasse 1, D-64291 Darmstadt, Germany.,Technische Universität Darmstadt, Darmstadt, Germany
| | - C La Tessa
- University of Trento, Via Sommarive 14, I-38123 Trento, Italy.,Trento Institute of Fundamental Physics and Applications (TIFPA), Via Sommarive 14, I-38123 Trento, Italy
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Bersano A, Kraemer M, Touzé E, Weber R, Alamowitch S, Sibon I, Pantoni L. Stroke care during the COVID-19 pandemic: experience from three large European countries. Eur J Neurol 2020; 27:1794-1800. [PMID: 32492764 PMCID: PMC7300856 DOI: 10.1111/ene.14375] [Citation(s) in RCA: 108] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 05/24/2020] [Indexed: 02/06/2023]
Abstract
In order to cope with the exponentially increasing number of patients infected with SARS-CoV-2, European countries made enormous efforts to reorganize medical assistance and several diseases, including stroke, were particularly impacted. We report the experience of stroke neurologists from three European countries (Italy, France and Germany) that faced the pandemic at diverse time points and with different approaches, depending on their resources and healthcare system organization. Pre-hospital and in-hospital acute stroke pathways were reorganized to prioritize COVID-19 management and, in severely affected regions of Italy and France, stroke care was centralized to a limited number of centers, whereas the remaining stroke units were dedicated to patients with COVID-19. Access to acute stroke diagnostics and time-dependent therapies was limited or delayed because of reduced capacities of emergency services due to the burden of patients with COVID-19. A marked reduction in the number of patients presenting with transient ischaemic attack and stroke was noted in the emergency departments of all three countries. Although we only have preliminary data, these conditions may have affected stroke outcome. These indirect effects of the COVID-19 pandemic could negate the efforts of stroke neurologists over the last few years to improve outcome and reduce mortality of stroke patients. Although the SARS-CoV-2 infection rate is slowing down in Europe, the effects of ending lockdown in the next months are unpredictable. It is important for the European and world stroke community to share what has been learned so far to be plan strategies to ensure stroke care in the future and upcoming challenging times.
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Affiliation(s)
- A. Bersano
- Cerebrovascular UnitFondazione IRCCS Istituto Neurologico Carlo BestaMilanItaly
| | - M. Kraemer
- Department of NeurologyAlfried Krupp Krankenhaus EssenEssen
- University Clinic of DuesseldorfHeinrich Heine UniversityDuesseldorfGermany
| | - E. Touzé
- Université Caen NormandieInserm U1237CHU Caen NormandieService de NeurologieGIP CyceronCaen14000France
| | - R. Weber
- Department of NeurologyAlfried Krupp Krankenhaus EssenEssen
- Faculty of MedicineRuhr‐University BochumBochumGermany
| | - S. Alamowitch
- Department of NeurologyInsermUMRS 938Hôpital St‐AntoineAP‐HPSorbonne UniversitéParis
| | - I. Sibon
- Stroke UnitDepartment of NeurologyCHU BordeauxBordeaux UniversityBordeauxFrance
| | - L. Pantoni
- Stroke and Dementia Laboratory‘Luigi Sacco’ Department of Biomedical and Clinical SciencesUniversity of MilanMilanItaly
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Mitri F, Enk A, Bersano A, Kraemer M. Livedo racemosa in neurological diseases: an update on the differential diagnoses. Eur J Neurol 2020; 27:1832-1843. [DOI: 10.1111/ene.14390] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 05/23/2020] [Accepted: 05/26/2020] [Indexed: 11/29/2022]
Affiliation(s)
- F. Mitri
- Department of Dermatology University Hospital Heidelberg Heidelberg Germany
| | - A. Enk
- Department of Dermatology University Hospital Heidelberg Heidelberg Germany
| | - A. Bersano
- Cerebrovascular Unit Fondazione IRCCS Istituto Neurologico ‘Carlo Besta’ Milan Italy
| | - M. Kraemer
- Department of Neurology Alfried Krupp von Bohlen und Halbach Hospital Essen Germany
- Department of Neurology Heinrich Heine University Hospital Düsseldorf Germany
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Bersano A, Kraemer M, Burlina A, Mancuso M, Finsterer J, Sacco S, Salvarani C, Caputi L, Chabriat H, Oberstein SL, Federico A, Tournier-Lasserve E, Hunt D, Dichgans M, Arnold M, Debette S, Markus HS. Correction to: Heritable and non-heritable uncommon causes of stroke. J Neurol 2020; 268:2808-2809. [PMID: 32556534 DOI: 10.1007/s00415-020-09948-4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A Bersano
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy.
| | - M Kraemer
- Department of Neurology Alfried, Krupp-Hospital, Essen, Germany.,Department of Neurology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - A Burlina
- Neurological Unit, St. Bassano Hospital, Bassano del Grappa, Italy
| | - M Mancuso
- Department of Clinical and Experimental Medicine, Neurological Institute, University of Pisa, Pisa, Italy
| | - J Finsterer
- Krankenanstalt Rudolfstiftung, Messerli Institute, Vienna, Austria
| | - S Sacco
- Department of Neurology, Avezzano Hospital, University of L'Aquila, L'Aquila, Italy
| | - C Salvarani
- University of Modena and Reggio Emilia, and Azienda USL-IRCCS, Reggio Emilia, Italy
| | - L Caputi
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - H Chabriat
- Department of Neurology and CERVCO, DHU Neurovasc, INSERM U1141, University of Paris, Paris, France
| | - S Lesnik Oberstein
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - A Federico
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - E Tournier-Lasserve
- Department of Genetics, Lariboisière Hospital and INSERM U1141, Paris-Diderot University, Paris, France
| | - D Hunt
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, EH4 2XU, UK
| | - M Dichgans
- Institute for Stroke and Dementia Research, Klinikum Der Universität München, Munich, Germany
| | - M Arnold
- Inserm Centre Bordeaux Population Health (U1219), University of Bordeaux, Bordeaux, France
| | - S Debette
- Department of Neurology, INSELSPITAL, University Hospital Bern, Bern, Switzerland
| | - H S Markus
- Stroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
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Bersano A, Kraemer M, Burlina A, Mancuso M, Finsterer J, Sacco S, Salvarani C, Caputi L, Chabriat H, Oberstein SL, Federico A, Lasserve ET, Hunt D, Dichgans M, Arnold M, Debette S, Markus HS. Heritable and non-heritable uncommon causes of stroke. J Neurol 2020; 268:2780-2807. [PMID: 32318851 DOI: 10.1007/s00415-020-09836-x] [Citation(s) in RCA: 13] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/15/2022]
Abstract
Despite intensive investigations, about 30% of stroke cases remains of undetermined origin. After exclusion of common causes of stroke, there is a number of rare heritable and non-heritable conditions, which often remain misdiagnosed, that should be additionally considered in the diagnosis of cryptogenic stroke. The identification of these diseases requires a complex work up including detailed clinical evaluation for the detection of systemic symptoms and signs, an adequate neuroimaging assessment and a careful family history collection. The task becomes more complicated by phenotype heterogeneity since stroke could be the primary or unique manifestation of a syndrome or represent just a manifestation (sometimes minor) of a multisystem disorder. The aim of this review paper is to provide clinicians with an update on clinical and neuroradiological features and a set of practical suggestions for the diagnostic work up and management of these uncommon causes of stroke. The identification of these stroke causes is important to avoid inappropriate and expensive diagnostic tests, to establish appropriate management measures, including presymptomatic testing, genetic counseling, and, if available, therapy. Therefore, physicians should become familiar with these diseases to provide future risk assessment and family counseling.
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Affiliation(s)
- A Bersano
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy.
| | - M Kraemer
- Department of Neurology Alfried, Krupp-Hospital, Essen, Germany.,Department of Neurology, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - A Burlina
- Neurological Unit, St. Bassano Hospital, Bassano del Grappa, Italy
| | - M Mancuso
- Department of Clinical and Experimental Medicine, Neurological Institute, University of Pisa, Pisa, Italy
| | - J Finsterer
- Krankenanstalt Rudolfstiftung, Messerli Institute, Vienna, Austria
| | - S Sacco
- Department of Neurology, Avezzano Hospital, University of L'Aquila, L'Aquila, Italy
| | - C Salvarani
- University of Modena and Reggio Emilia, and Azienda USL-IRCCS, Reggio Emilia, Italy
| | - L Caputi
- Cerebrovascular Unit, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - H Chabriat
- Department of Neurology and CERVCO, DHU Neurovasc, INSERM U1141, University of Paris, Paris, France
| | - S Lesnik Oberstein
- Department of Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
| | - A Federico
- Department of Medicine, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - E Tournier Lasserve
- Department of Genetics, Lariboisière Hospital and INSERM U1141, Paris-Diderot University, Paris, France
| | - D Hunt
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, EH4 2XU, UK
| | - M Dichgans
- Institute for Stroke and Dementia Research, Klinikum Der Universität München, Munich, Germany
| | - M Arnold
- Inserm Centre Bordeaux Population Health (U1219), University of Bordeaux, Bordeaux, France
| | - S Debette
- Department of Neurology, INSELSPITAL, University Hospital Bern, Bern, Switzerland
| | - H S Markus
- Stroke Research Group, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
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Christiansen H, Kis B, Hirsch O, Matthies S, Hebebrand J, Uekermann J, Abdel-Hamid M, Kraemer M, Wiltfang J, Graf E, Colla M, Sobanski E, Alm B, Rösler M, Jacob C, Jans T, Huss M, Schimmelmann B, Philipsen A. German validation of the Conners Adult ADHD Rating Scales (CAARS) II: Reliability, validity, diagnostic sensitivity and specificity. Eur Psychiatry 2020; 27:321-8. [DOI: 10.1016/j.eurpsy.2010.12.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2010] [Revised: 12/13/2010] [Accepted: 12/26/2010] [Indexed: 10/18/2022] Open
Abstract
AbstractBackgroundThe German version of the Conners Adult ADHD Rating Scales (CAARS) has proven to show very high model fit in confirmative factor analyses with the established factors inattention/memory problems, hyperactivity/restlessness, impulsivity/emotional lability, and problems with self-concept in both large healthy control and ADHD patient samples. This study now presents data on the psychometric properties of the German CAARS-self-report (CAARS-S) and observer-report (CAARS-O) questionnaires.MethodsCAARS-S/O and questions on sociodemographic variables were filled out by 466 patients with ADHD, 847 healthy control subjects that already participated in two prior studies, and a total of 896 observer data sets were available. Cronbach's-alpha was calculated to obtain internal reliability coefficients. Pearson correlations were performed to assess test-retest reliability, and concurrent, criterion, and discriminant validity. Receiver Operating Characteristics (ROC-analyses) were used to establish sensitivity and specificity for all subscales.ResultsCoefficient alphas ranged from .74 to .95, and test-retest reliability from .85 to .92 for the CAARS-S, and from .65 to .85 for the CAARS-O. All CAARS subscales, except problems with self-concept correlated significantly with the Barrett Impulsiveness Scale (BIS), but not with the Wender Utah Rating Scale (WURS). Criterion validity was established with ADHD subtype and diagnosis based on DSM-IV criteria. Sensitivity and specificity were high for all four subscales.ConclusionThe reported results confirm our previous study and show that the German CAARS-S/O do indeed represent a reliable and cross-culturally valid measure of current ADHD symptoms in adults.
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Curiale MS, Gangar V, D’onorio A, Gambrel-Lenarz S, Mcallister JS, Bailey B, Bednar AM, Bowen B, Brown D, Bulthaus M, Cash J, Cirigliano M, Cox M, D’onorio A, David OE, Fraser J, Frye K, Gangar V, Gambrel-Lenarz S, Hanlin J, Helbig T, Johnson J, Jost-Keating K, Kora L, Koeritzer R, Kozlowski S, Kraemer M, Lally S, Lambeth B, Lawlor K, Lewandowski V, Lopez S, McDonald S, Mclntyre S, Naq M, Pierson M, Reinhard J, Richter D, Saunders L, Simpson P, Smoot L, Tong MS, Warburton D, Williams H, Wilson-Perry A, Yuan J. High-Sensitivity Dry Rehydratable Film Method for Enumeration of Coliforms in Dairy Products: Collaborative Study. J AOAC Int 2020. [DOI: 10.1093/jaoac/80.3.505] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Abstract
A dry-film coliform count plate that is inoculated with 5 mL sample was compared with the Violet Red Bile Agar plate method in a collaborative study by 18 laboratories. Products analyzed were 2% milk, chocolate milk, cream, vanilla ice cream, cottage cheese, and cheese. Collaborators tested blind duplicate uninoculated samples and samples inoculated at low, medium, and high level. Significantly (P< 0.05) higher numbers of coliforms were recovered by the dry-film method from 2% milk samples at the 3 inoculum levels, the chocolate milk at the low- and high-inoculum levels, and the cream at the high-inoculum level. Significantly higher counts were obtained by the agar method for cottage cheese samples at the low-inoculum level. The repeatability standard deviation for the dry-film method was significantly higher for the high-inoculum level chocolate milk sample and the medium-inoculum level cottage cheese. The same statistic was significantly higher for the agar method at all 3 inoculum levels in the 2% milk and the medium-inoculum level cream. The high-sensitivity dry rehydratable film method for enumeration of coliforms in dairy products has been adopted first action by AOAC INTERNATIONAL.
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Affiliation(s)
- Michael S Curiale
- Silliker Laboratories Group, Inc., Corporate Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Vidhya Gangar
- Silliker Laboratories Group, Inc., Corporate Research Center, 160 Armory Dr, South Holland, IL 60473
| | - Armando D’onorio
- Silliker Laboratories Group, Inc., Corporate Research Center, 160 Armory Dr, South Holland, IL 60473
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12
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Hespeels F, Heuskin AC, Tabarrant T, Scifoni E, Kraemer M, Chêne G, Strivay D, Lucas S. Backscattered electron emission after proton impact on gold nanoparticles with and without polymer shell coating. Phys Med Biol 2019; 64:125007. [PMID: 30986778 DOI: 10.1088/1361-6560/ab195f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This work aims at measuring experimentally proton induced secondary electron energy spectra after interaction with gold nano particles (GNPs) and polymer-coated GNPs. Backscattered electron energy spectra were collected over a 0 to 1000 eV energy range using a retarding field analyzer (RFA). This paper presents the spectra obtained for proton beam energies of 0.5 and 2 MeV and diameter 2.5 and 3.8 nm GNPs. The spectra were also measured for 3.8 nm GNPs after 5 and 10 MeV proton irradiations. GNPs were deposited on a 100 nm carbon film. Each experimental spectrum was compared with dedicated simulations based on existing numerical models used in the TRAX and Geant4 Monte Carlo codes. For 100 nm carbon target, good agreement between experimental, TRAX and Geant4 simulation results can be observed. For 3.8 nm GNPs, the TRAX simulations reproduce with good agreement the electron energy spectra produced after 0.5, 2, 5 and 10 MeV proton irradiations, while Geant4 spectra display a lower secondary electron yield at low energy (<600 eV) for all the studied energies. This underestimation can mostly be explained by the 790 eV threshold applied in the condensed history model used by Geant4 which impacts the secondary electron energy distribution. Results obtained for carbon and gold targets highlight the impact of the secondary electron production threshold for proton ionization process considered in condensed history models. The experimental results demonstrate that the single interaction approach used in TRAX is adapted to reproduce secondary electron emission from GNPs. On the other hand, the standard electron generation threshold implement in G4BetheBlochModel and G4BraggModel condensed-history models used in Geant4 is not adapted to reproduce low energy electron emission in gold targets. Finally, the results highlight that the GNP coating leads to a decrease of the electron yield and mostly affects low energy electrons (<500 eV) emitted from GNPs.
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Affiliation(s)
- F Hespeels
- University of Namur, PMR, 61 rue de Bruxelles, 5000 Namur, Belgium
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13
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Yang L, Kraemer M, Fang XF, Angel PM, Drake RR, Morris AJ, Smyth SS. LPA receptor 4 deficiency attenuates experimental atherosclerosis. J Lipid Res 2019; 60:972-980. [PMID: 30796085 PMCID: PMC6495174 DOI: 10.1194/jlr.m091066] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 02/14/2019] [Indexed: 12/13/2022] Open
Abstract
The widely expressed lysophosphatidic acid (LPA) selective receptor 4 (LPAR4) contributes to vascular development in mice and zebrafish. LPAR4 regulates endothelial permeability, lymphocyte migration, and hematopoiesis, which could contribute to atherosclerosis. We investigated the role of LPAR4 in experimental atherosclerosis elicited by adeno-associated virus expressing PCSK9 to lower LDL receptor levels. After 20 weeks on a Western diet, cholesterol levels and lipoprotein distribution were similar in WT male and Lpar4Y/- mice (P = 0.94). The atherosclerotic lesion area in the proximal aorta and arch was ∼25% smaller in Lpar4Y/- mice (P = 0.009), and less atherosclerosis was detected in Lpar4Y/- mice at any given plasma cholesterol. Neutral lipid accumulation in aortic root sections occupied ∼40% less area in Lpar4Y/- mice (P = 0.001), and CD68 expression was ∼25% lower (P = 0.045). No difference in α-smooth muscle actin staining was observed. Bone marrow-derived macrophages isolated from Lpar4Y/- mice displayed significantly increased upregulation of the M2 marker Arg1 in response to LPA compared with WT cells. In aortic root sections from Lpar4Y/- mice, heightened M2 "repair" macrophage marker expression was detected by CD206 staining (P = 0.03). These results suggest that LPAR4 may regulate the recruitment of specific sets of macrophages or their phenotypic switching in a manner that could influence the development of atherosclerosis.
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Affiliation(s)
- Liping Yang
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536
| | - Maria Kraemer
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536
| | - Xianjun Frank Fang
- Department of Biochemistry and Molecular Biology VCU Massey Cancer Center, Virginia Commonwealth University, Richmond, VA 23298-0614
| | - Peggi M Angel
- Department of Cell and Molecular Pharmacology MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC 29425
| | - Richard R Drake
- Department of Cell and Molecular Pharmacology MUSC Proteomics Center, Medical University of South Carolina, Charleston, SC 29425
| | - Andrew J Morris
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536; Veterans Affairs Medical Center, Lexington, KY 40511
| | - Susan S Smyth
- Division of Cardiovascular Medicine, Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY 40536; Veterans Affairs Medical Center, Lexington, KY 40511.
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14
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Hespeels F, Lucas S, Tabarrant T, Scifoni E, Kraemer M, Chêne G, Strivay D, Tran HN, Heuskin AC. Experimental measurements validate the use of the binary encounter approximation model to accurately compute proton induced dose and radiolysis enhancement from gold nanoparticles. Phys Med Biol 2019; 64:065014. [PMID: 30731439 DOI: 10.1088/1361-6560/ab0516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In protontherapy, it has been suggested that nanoparticles of high-Z material like gold (GNP) could be used as radiosensitizers. The origin of this enhancement phenomenon for proton radiation is not yet well understood and additional mechanistic insights are required. Previous works have highlighted the good capabilities of TRAX to reproduce secondary electron emission from gold material. Therefore, TRAX cross sections obtained with the binary encounter approximation (BEA) model for proton ionization were implemented within Geant4 for gold material. Based on the TRAX cross sections, improved Geant4 simulations have been developed to investigate the energy deposition and radical species production around a spherical gold nanoparticle (5 and 10 nm in diameter) placed in a water volume during proton irradiation. Simulations were performed for incident 2 MeV proton. The dose enhancement factor and the radiolysis enhancement factor were quantified. Results obtained with the BEA model were compared with results obtained with condensed-history models. Experimental irradiation of 200 nm gold films were performed to validate the secondary electron emission reproduction capabilities of physical models used in Monte Carlo (MC) simulations. TRAX simulations reproduced the experimental backscattered electron energy spectrum from gold film with better agreement than Geant4. Results on gold film obtained with the BEA model enabled to estimate the electron emission from GNPs. Results obtained in our study tend to support that the use of the BEA discrete model leads to a significant increase of the dose in the near vicinity of GNPs (<20 nm), while condensed history models used in Geant4 seem to overestimate the dose and the number of chemical species for increasing distances from the GNP. Based on discrete BEA model results, no enhancement effect due to secondary electron emitted from the GNP is expected if the GNP is not in close proximity to key cellular functional elements (DNA, mitochondria…).
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Affiliation(s)
- F Hespeels
- University of Namur, PMR, 61 rue de Bruxelles, 5000 Namur, Belgium
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15
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Brandon JA, Kraemer M, Vandra J, Halder S, Ubele M, Morris AJ, Smyth SS. Adipose-derived autotaxin regulates inflammation and steatosis associated with diet-induced obesity. PLoS One 2019; 14:e0208099. [PMID: 30730895 PMCID: PMC6366870 DOI: 10.1371/journal.pone.0208099] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 11/12/2018] [Indexed: 01/02/2023] Open
Abstract
Autotaxin (ATX) is a secreted enzyme that generates the bioactive lipid lysophosphatidic acid (LPA). We generated mice with global inducible post-natal inactivation or adipose-specific loss of the Enpp2 gene encoding ATX. The animals are phenotypically unremarkable and exhibit differences in adipocyte size and adipose tissue expression of inflammatory genes after high fat feeding without gross differences in fat distribution or body mass. Surprisingly, both models of Enpp2- deficiency exhibited marked protection from high fat diet-induced hepatic steatosis. This phenotype was not associated with differences in dietary fat absorption but may be accounted for by differences in hepatic expression of genes involved in de novo synthesis of triglycerides. These findings suggest that pharmacological inhibition of ATX might be protective against hepatic steatosis.
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Affiliation(s)
- J. Anthony Brandon
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
| | - Maria Kraemer
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
| | - Julia Vandra
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
| | - Suchismita Halder
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
| | - Margo Ubele
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
| | - Andrew J. Morris
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
- Department of Veterans Affairs Medical Center, Lexington, Kentucky, United States of America
| | - Susan S. Smyth
- Division of Cardiovascular Medicine, The Gill Heart and Vascular Institute, University of Kentucky, Lexington, KY, United States of America
- Department of Veterans Affairs Medical Center, Lexington, Kentucky, United States of America
- * E-mail:
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16
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Kraemer M. Genome sequencing to contain viral epidemics. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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17
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Kraayvanger L, Berlit P, Albrecht P, Hartung HP, Kraemer M. Cerebrospinal fluid findings in reversible cerebral vasoconstriction syndrome: a way to differentiate from cerebral vasculitis? Clin Exp Immunol 2018; 193:341-345. [PMID: 29722896 DOI: 10.1111/cei.13148] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/31/2018] [Accepted: 04/23/2018] [Indexed: 11/29/2022] Open
Abstract
Reversible cerebral vasoconstriction syndrome (RCVS) is characterized by an acute onset of severe headache and multi-focal segmental vasoconstriction of cerebral arteries resolving within 12 weeks. Diagnostic criteria include normal or near-normal findings in cerebrospinal fluid (CSF) analysis, especially leucocyte levels < 10/mm³. Distinguishing RCVS from primary angiitis of the central nervous system (PACNS) is essential to avoid unnecessary and sometimes unfavourable immunosuppressive treatment. We reviewed retrospectively the clinical and diagnostic data of 10 RCVS patients who presented in our neurological department from 1 January 2013 to February 2017. The main purpose was to verify whether CSF leucocyte counts < 10/mm³ serve to discriminate RCVS from PACNS. Five of six patients who underwent lumbar puncture presented with CSF leucocyte levels ≥ 10/mm³. Two patients had a history of misinterpretation of CSF pleocytosis as cerebral vasculitis and of immunosuppressive treatment. A complete restitution of cerebral vasoconstriction was evident in all. No patient had further cerebral strokes or bleedings without immunosuppressive treatment over more than 12 weeks. Despite the established diagnostic criteria, RCVS can manifest with CSF leucocyte levels > 10/mm³. Careful anamnesis and the response of 'vasculitis-like angiography' to nimodipine given as a test during angiography and as oral medication are key to differentiate RCVS from cerebral vasculitis.
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Affiliation(s)
- L Kraayvanger
- Department of Neurology, Alfried Krupp Krankenhaus, Essen, Germany
| | - P Berlit
- Department of Neurology, Alfried Krupp Krankenhaus, Essen, Germany
| | - P Albrecht
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - H-P Hartung
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - M Kraemer
- Department of Neurology, Alfried Krupp Krankenhaus, Essen, Germany.,Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
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18
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Matsushige T, Kraemer M, Sato T, Berlit P, Forsting M, Ladd ME, Jabbarli R, Sure U, Khan N, Schlamann M, Wrede KH. Visualization and Classification of Deeply Seated Collateral Networks in Moyamoya Angiopathy with 7T MRI. AJNR Am J Neuroradiol 2018; 39:1248-1254. [PMID: 29880473 DOI: 10.3174/ajnr.a5700] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 03/07/2018] [Indexed: 01/26/2023]
Abstract
BACKGROUND AND PURPOSE Collateral networks in Moyamoya angiopathy have a complex angioarchitecture difficult to comprehend on conventional examinations. This study aimed to evaluate morphologic patterns and the delineation of deeply seated collateral networks using ultra-high-field MRA in comparison with conventional DSA. MATERIALS AND METHODS Fifteen white patients with Moyamoya angiopathy were investigated in this prospective trial. Sequences acquired at 7T were TOF-MRA with 0.22 × 0.22 × 0.41 mm3 resolution and MPRAGE with 0.7 × 0.7 × 0.7 mm3 resolution. Four raters evaluated the presence of deeply seated collateral networks and image quality in a consensus reading of DSA, TOF-MRA, and MPRAGE using a 5-point scale in axial source images and maximum intensity projections. Delineation of deeply seated collateral networks by different imaging modalities was compared by means of the McNemar test, whereas image quality was compared using the Wilcoxon signed-rank test. RESULTS The relevant deeply seated collateral networks were classified into 2 categories and 6 pathways. A total of 100 collateral networks were detected on DSA; 106, on TOF-MRA; and 73, on MPRAGE. Delineation of deeply seated collateral networks was comparable between TOF-MRA and DSA (P = .25); however, both were better than MPRAGE (P < .001). CONCLUSIONS This study demonstrates excellent delineation of 6 distinct deeply seated collateral network pathways in Moyamoya angiopathy in white adults using 7T TOF-MRA, comparable to DSA.
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Affiliation(s)
- T Matsushige
- From the Department of Neurosurgery (T.M., T.S., R.J., U.S., K.H.W.), University Hospital Essen, University Duisburg-Essen, Essen, Germany.,Department of Neurosurgery (T.M.), Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan.,Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., T.S., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany
| | - M Kraemer
- Department of Neurology (M.K., P.B.), Alfried Krupp Hospital, Essen, Germany.,Department of Neurology (M.K.), University Hospital Duesseldorf, Duesseldorf, Germany
| | - T Sato
- From the Department of Neurosurgery (T.M., T.S., R.J., U.S., K.H.W.), University Hospital Essen, University Duisburg-Essen, Essen, Germany.,Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., T.S., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany.,Department of Neurosurgery (T.S.), Fukushima Medical University, Fukushima, Japan
| | - P Berlit
- Department of Neurology (M.K., P.B.), Alfried Krupp Hospital, Essen, Germany
| | - M Forsting
- Department of Diagnostic and Interventional Radiology and Neuroradiology (M.F., M.S.), University Hospital Essen, Essen, Germany
| | - M E Ladd
- Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., T.S., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany.,Medical Physics in Radiology (M.E.L.), German Cancer Research Center, Heidelberg, Germany.,Faculty of Physics and Astronomy and Faculty of Medicine (M.E.L.), University of Heidelberg, Heidelberg, Germany
| | - R Jabbarli
- From the Department of Neurosurgery (T.M., T.S., R.J., U.S., K.H.W.), University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - U Sure
- From the Department of Neurosurgery (T.M., T.S., R.J., U.S., K.H.W.), University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - N Khan
- Moyamoya Center, Division of Pediatric Neurosurgery (N.K.), Department of Surgery, University Children's Hospital Zurich, Zurich, Switzerland
| | - M Schlamann
- Department of Diagnostic and Interventional Radiology and Neuroradiology (M.F., M.S.), University Hospital Essen, Essen, Germany.,Department of Neuroradiology (M.S.), University Hospital Cologne, Cologne, Germany
| | - K H Wrede
- From the Department of Neurosurgery (T.M., T.S., R.J., U.S., K.H.W.), University Hospital Essen, University Duisburg-Essen, Essen, Germany .,Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., T.S., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany
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19
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Kraemer M, Biemann R, Isermann B, Lammert F, Schneider J. Plasma VAP-1 concentration and activity during lifestyle-induced body weight reduction. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- M Kraemer
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin II, Homburg, Germany
| | - R Biemann
- Universität Magdeburg- Institut für Klinische Chemie, Magdeburg, Germany
| | - B Isermann
- Universität Magdeburg- Institut für Klinische Chemie, Magdeburg, Germany
| | - F Lammert
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin II, Homburg, Germany
| | - J Schneider
- Universitätsklinikum des Saarlandes, Klinik für Innere Medizin II, Homburg, Germany
- Luxembourg Centre for Systems Biomedicine, Luxemburg, Luxembourg
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20
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Gerlach J, Botsch M, Kardassis D, Lemmens P, Schön M, Janke J, Puhl G, Unger J, Kraemer M, Busse B, Böhmer C, Belal R, Ingenlath M, Kosan M, Kosan B, Sültmann J, Patzold A, Tietze S, Rossaint R, Müller C, Mönch E, Sauer I, Neuhaus P. Experimental Evaluation of a Cell Module for Hybrid Liver Support. Int J Artif Organs 2018. [DOI: 10.1177/039139880102401105] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aim of the study was to evaluate a hybrid liver support system in a porcine model of acute liver failure, after hepatectomy. Pigs with a body weight of 70±18 kg underwent total hepatectomy and porto - cavo - caval shunting as well as ligation of the bile duct and the hepatic artery. Control animals were connected to the system (including capillary membrane plasma separation) containing a four compartment bioreactor with integral oxygenation and decentralized mass exchange but without liver cells. The treatment group received hybrid liver support with the same system including 370±42 g primary isolated porcine parenchymal liver cells in co-culture with hepatocyte nursing cells, tissue engineered to liver- like structures at high density. Treatment started after complete recovery from anesthesia and was performed continuously. A positive influence on peripheral vascular resistance and a reduced need of catecholamine dosage was observed in the treatment group. Hybrid liver support with a cell module upscaled for clinical application significantly prolonged survival time in animals after hepatectomy with the longest survival being 26 hours in the control group an 57 hours in the treatment group.
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Affiliation(s)
| | | | | | - P. Lemmens
- Clinic for Surgery Havelhöhe, Berlin - Germany
| | | | - J. Janke
- Clinic for Anaesthesiology and Intensive Care Medicine
| | | | - J. Unger
- Clinic for Anaesthesiology and Intensive, Care Medicine, RWTH Aachen - Germany
| | | | | | | | | | | | | | | | | | | | | | - R. Rossaint
- Clinic for Anaesthesiology and Intensive, Care Medicine, RWTH Aachen - Germany
| | | | - E. Mönch
- Clinic for Pediatrics, Charité, Campus Virchow Klinikum, Humboldt University of Berlin, Berlin - Germany
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Kraemer M, Echle R, Heinke M. P924Simulation of electrical fields in cardiac resynchronization therapy and temperature spread in HF ablation. Europace 2017. [DOI: 10.1093/ehjci/eux151.106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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22
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Kis B, Guberina N, Kraemer M, Niklewski F, Dziobek I, Wiltfang J, Abdel-Hamid M. Perception of emotional prosody in adults with attention deficit hyperactivity disorder. Acta Psychiatr Scand 2017; 135:506-514. [PMID: 28276052 DOI: 10.1111/acps.12719] [Citation(s) in RCA: 9] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/14/2017] [Indexed: 11/27/2022]
Abstract
OBJECTIVE Attention deficit hyperactivity disorder (ADHD) is associated with social conflicts. The purpose of this study was to explore domains of social cognition in adult patients with ADHD. METHODS The assessment of social cognition was based on established neuropsychological tests: the Tübinger Affect Battery (TAB) for prosody and the Cambridge Behaviour Scale (CBS) for empathy. The performance of adults with ADHD (N = 28) was compared with the performance of a control group (N = 29) matched according to basic demographic variables. RESULTS Treatment-naïve adults with ADHD showed deficits in emotional prosody (P = 0.02) and in the ability to empathize (P < 0.02) independent of executive functioning. In particular, their ability to perceive angry feelings was found to be compromised (P = 0.04). When emotional prosody was considered in relation to facial expressions, patients and controls showed no impairments (P > 0.2). No gender differences concerning social cognitive skills were detected. CONCLUSIONS ADHD is associated with social cognition impairments involving both emotional prosody and empathy.
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Affiliation(s)
- B Kis
- Department of Psychiatry and Psychotherapy, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - N Guberina
- LVR Hospital Essen, Department of Psychiatry and Psychotherapy, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany.,Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany
| | - M Kraemer
- Department of Neurology, Alfried Krupp von Bohlen and Halbach Hospital, Essen, Germany
| | - F Niklewski
- LVR Hospital Essen, Department of Psychiatry and Psychotherapy, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany
| | - I Dziobek
- Berlin School of Mind and Brain, Humboldt University, Berlin, Germany
| | - J Wiltfang
- Department of Psychiatry and Psychotherapy, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - M Abdel-Hamid
- Department of Psychiatry and Psychotherapy, University Medical Center Göttingen (UMG), Göttingen, Germany
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Becker J, Horn P, Keyvani K, Metz I, Wegner C, Brück W, Heinemann F, Schwitalla J, Berlit P, Kraemer M. Primary central nervous system vasculitis and its mimicking diseases – clinical features, outcome, comorbidities and diagnostic results – A case control study. Clin Neurol Neurosurg 2017; 156:48-54. [DOI: 10.1016/j.clineuro.2017.03.006] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 03/06/2017] [Accepted: 03/07/2017] [Indexed: 11/30/2022]
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Vogel H, Kraemer M, Rabasa C, Askevik K, Adan RAH, Dickson SL. Genetic predisposition to obesity affects behavioural traits including food reward and anxiety-like behaviour in rats. Behav Brain Res 2017; 328:95-104. [PMID: 28389340 DOI: 10.1016/j.bbr.2017.02.037] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 01/17/2017] [Accepted: 02/22/2017] [Indexed: 11/28/2022]
Abstract
Here we sought to define behavioural traits linked to anxiety, reward, and exploration in different strains of rats commonly used in obesity research. We hypothesized that genetic variance may contribute not only to their metabolic phenotype (that is well documented) but also to the expression of these behavioural traits. Rat strains that differ in their susceptibility to develop an obese phenotype (Sprague-Dawley, Obese Prone, Obese Resistant, and Zucker rats) were exposed to a number of behavioural tests starting at the age of 8 weeks. We found a similar phenotype in the obesity susceptible models, Obese Prone and Zucker rats, with a lower locomotor activity, exploratory activity, and higher level of anxiety-like behaviour in comparison to the leaner Obese Resistant strain. We did not find evidence that rat strains with a genetic predisposition to obesity differed in their ability to experience reward from chocolate (in a condition place preference task). However, Zucker rats show higher motivated behaviour for sucrose compared to Obese Resistant rats when the effort required to obtain palatable food is relatively low. Together our data demonstrate that rat strains that differ in their genetic predisposition to develop obesity also differ in their performance in behavioural tests linked to anxiety, exploration, and reward and that these differences are independent of body weight. We conclude that genetic variations which determine body weight and the aforementioned behaviours co-exist but that future studies are required to identify whether (and which) common genes are involved.
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Affiliation(s)
- Heike Vogel
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden; Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany; German Center for Diabetes Research (DZD), München-Neuherberg, Germany
| | - Maria Kraemer
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Cristina Rabasa
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Kaisa Askevik
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Roger A H Adan
- Brain Center Rudolf Magnus, Department of Translational Neuroscience, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Suzanne L Dickson
- Department of Physiology/Endocrinology, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
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Matsushige T, Kraemer M, Schlamann M, Berlit P, Forsting M, Ladd ME, Sure U, Wrede KH. Ventricular Microaneurysms in Moyamoya Angiopathy Visualized with 7T MR Angiography. AJNR Am J Neuroradiol 2016; 37:1669-72. [PMID: 27151748 DOI: 10.3174/ajnr.a4786] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/05/2016] [Indexed: 11/07/2022]
Abstract
The pathophysiologic role of hemodynamic alteration to peripheral vessels in Moyamoya angiopathy and the formation of microaneurysms remains unclear. The purpose of this study was to investigate microaneurysms in collateral Moyamoya vessels by using 7T ultra-high-field MR imaging. Ten patients with Moyamoya disease were evaluated with TOF-MRA at 7T acquired with 0.22 × 0.22 × 0.41 mm(3) resolution. In 10 patients, 4 microaneuryms located in the ventricles were delineated. The mean diameters of collateral vessels and microaneurysms arising from those vessels were 0.87 mm (range, 0.79-1.07 mm) and 0.80 mm (range, 0.56-0.96 mm), respectively. In 1 case with follow-up scans 6 months after a direct extracranial-intracranial bypass operation, the microaneurysm disappeared. Ventricular microaneurysms in Moyamoya angiopathy collateral vessels, inaccessible by conventional imaging techniques, can be detected by 7T TOF-MRA.
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Affiliation(s)
- T Matsushige
- From the Departments of Neurosurgery (T.M., U.S., K.H.W.) Department of Neurosurgery (T.M.), Graduate School of Biomedical and Health Sciences, Hiroshima University, Hiroshima, Japan Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany
| | - M Kraemer
- Department of Neurology (M.K., P.B.), Alfried Krupp Hospital, Essen, Germany
| | - M Schlamann
- Diagnostic and Interventional Radiology and Neuroradiology (M.S., M.F.), University Hospital Essen, University Duisburg-Essen, Essen, Germany Department of Neuroradiology (M.S.), University Hospital Giessen, Giessen, Germany
| | - P Berlit
- Department of Neurology (M.K., P.B.), Alfried Krupp Hospital, Essen, Germany
| | - M Forsting
- Diagnostic and Interventional Radiology and Neuroradiology (M.S., M.F.), University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - M E Ladd
- Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany Division of Medical Physics in Radiology (M.E.L.), German Cancer Research Center, Heidelberg, Germany
| | - U Sure
- From the Departments of Neurosurgery (T.M., U.S., K.H.W.)
| | - K H Wrede
- From the Departments of Neurosurgery (T.M., U.S., K.H.W.) Erwin L. Hahn Institute for Magnetic Resonance Imaging (T.M., M.E.L., K.H.W.), University Duisburg-Essen, Essen, Germany
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Weigel K, Rozanov A, Azam F, Bramstedt K, Damadeo R, Eichmann KU, Gebhardt C, Hurst D, Kraemer M, Lossow S, Read W, Spelten N, Stiller GP, Walker KA, Weber M, Bovensmann H, Burrows JP. UTLS water vapour from SCIAMACHY limb measurementsV3.01 (2002-2012). Atmos Meas Tech 2016; 9:133-158. [PMID: 29263764 PMCID: PMC5734655 DOI: 10.5194/amt-9-133-2016] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) aboard the Envisat satellite provided measurements from August 2002 until April 2012. SCIAMACHY measured the scattered or direct sunlight using different observation geometries. The limb viewing geometry allows the retrieval of water vapour at about 10-25 km height from the near-infrared spectral range (1353-1410 nm). These data cover the upper troposphere and lower stratosphere (UTLS), a region in the atmosphere which is of special interest for a variety of dynamical and chemical processes as well as for the radiative forcing. Here, the latest data version of water vapour (V3.01) from SCIAMACHY limb measurements is presented and validated by comparisons with data sets from other satellite and in situ measurements. Considering retrieval tests and the results of these comparisons, the V3.01 data are reliable from about 11 to 23 km and the best results are found in the middle of the profiles between about 14 and 20 km. Above 20 km in the extra tropics V3.01 is drier than all other data sets. Additionally, for altitudes above about 19 km, the vertical resolution of the retrieved profile is not sufficient to resolve signals with a short vertical structure like the tape recorder. Below 14 km, SCIAMACHY water vapour V3.01 is wetter than most collocated data sets, but the high variability of water vapour in the troposphere complicates the comparison. For 14-20 km height, the expected errors from the retrieval and simulations and the mean differences to collocated data sets are usually smaller than 10 % when the resolution of the SCIAMACHY data is taken into account. In general, the temporal changes agree well with collocated data sets except for the Northern Hemisphere extratropical stratosphere, where larger differences are observed. This indicates a possible drift in V3.01 most probably caused by the incomplete treatment of volcanic aerosols in the retrieval. In all other regions a good temporal stability is shown. In the tropical stratosphere an increase in water vapour is found between 2002 and 2012, which is in agreement with other satellite data sets for overlapping time periods.
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Affiliation(s)
- K. Weigel
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - A. Rozanov
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - F. Azam
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - K. Bramstedt
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - R. Damadeo
- NASA Langley Research Center, Hampton, Virginia, USA
| | - K.-U. Eichmann
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - C. Gebhardt
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - D. Hurst
- Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, Colorado, USA
- Global Monitoring Division, NOAA Earth System Research Laboratory, Boulder, Colorado, USA
| | - M. Kraemer
- Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research – Stratosphere IEK-7, Jülich, Germany
| | - S. Lossow
- Karlsruhe Institute of Technology – KIT, Institute for Meteorology and Climate Research – IMK, Karlsruhe, Germany
| | - W. Read
- Jet Propulsion Laboratory, California Institute of Technology, Pasadena, California, USA
| | - N. Spelten
- Forschungszentrum Jülich GmbH, Institute for Energy and Climate Research – Stratosphere IEK-7, Jülich, Germany
| | - G. P. Stiller
- Karlsruhe Institute of Technology – KIT, Institute for Meteorology and Climate Research – IMK, Karlsruhe, Germany
| | - K. A. Walker
- Department of Physics, University of Toronto, Toronto, Canada
| | - M. Weber
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - H. Bovensmann
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
| | - J. P. Burrows
- Institute of Environmental Physics – IUP, University of Bremen, Bremen, Germany
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Lubura M, Hesse D, Kraemer M, Hallahan N, Schupp M, von Löffelholz C, Kriebel J, Rudovich N, Pfeiffer A, John C, Scheja L, Heeren J, Koliaki C, Roden M, Schürmann A. Diabetes prevalence in NZO females depends on estrogen action on liver fat content. Am J Physiol Endocrinol Metab 2015; 309:E968-80. [PMID: 26487005 DOI: 10.1152/ajpendo.00338.2015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [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: 07/22/2015] [Accepted: 10/16/2015] [Indexed: 02/08/2023]
Abstract
In humans and rodents, risk of metabolic syndrome is sexually dimorphic, with an increased incidence in males. Additionally, the protective role of female gonadal hormones is ostensible, as prevalence of type 2 diabetes mellitus (T2DM) increases after menopause. Here, we investigated the influence of estrogen (E2) on the onset of T2DM in female New Zealand obese (NZO) mice. Diabetes prevalence (defined as blood glucose levels >16.6 mmol/l) of NZO females on high-fat diet (60 kcal% fat) in week 22 was 43%. This was markedly dependent on liver fat content in week 10, as detected by computed tomography. Only mice with a liver fat content >9% in week 10 plus glucose levels >10 mmol/l in week 9 developed hyperglycemia by week 22. In addition, at 11 wk, diacylglycerols were elevated in livers of diabetes-prone mice compared with controls. Hepatic expression profiles obtained from diabetes-prone and -resistant mice at 11 wk revealed increased abundance of two transcripts in diabetes-prone mice: Mogat1, which catalyzes the synthesis of diacylglycerols from monoacylglycerol and fatty acyl-CoA, and the fatty acid transporter Cd36. E2 treatment of diabetes-prone mice for 10 wk prevented any further increase in liver fat content and reduced diacylglycerols and the abundance of Mogat1 and Cd36, leading to a reduction of diabetes prevalence and an improved glucose tolerance compared with untreated mice. Our data indicate that early elevation of hepatic Cd36 and Mogat1 associates with increased production and accumulation of triglycerides and diacylglycerols, presumably resulting in reduced hepatic insulin sensitivity and leading to later onset of T2DM.
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Affiliation(s)
- Marko Lubura
- Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
| | - Deike Hesse
- Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
| | - Maria Kraemer
- Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
| | - Nicole Hallahan
- Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany
| | - Michael Schupp
- Institute of Pharmacology, Center for Cardiovascular Research, Charité University Medicine, Berlin, Germany
| | - Christian von Löffelholz
- German Center for Diabetes Research, Neuherberg, Germany; Department of Clinical Nutrition, DIfE, Nuthetal, Germany; Integrated Research and Treatment Center, Center for Sepsis Control and Care, Friedrich Schiller University, and Department of Anaesthesiology and Intensive Care, Jena University Hospital, Jena, Germany
| | - Jennifer Kriebel
- German Center for Diabetes Research, Neuherberg, Germany; Research Unit of Molecular Epidemiology, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, German Center for Diabetes Research, and Institute of Epidemiology II, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Neuherberg, Germany
| | - Natalia Rudovich
- German Center for Diabetes Research, Neuherberg, Germany; Department of Clinical Nutrition, DIfE, Nuthetal, Germany
| | - Andreas Pfeiffer
- German Center for Diabetes Research, Neuherberg, Germany; Department of Clinical Nutrition, DIfE, Nuthetal, Germany
| | - Clara John
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Ludger Scheja
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Joerg Heeren
- Department of Biochemistry and Molecular Cell Biology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Chryssi Koliaki
- German Center for Diabetes Research, Neuherberg, Germany; Institute for Clinical Diabetology, German Diabetes Center, Leibniz Institute for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany; and Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Michael Roden
- German Center for Diabetes Research, Neuherberg, Germany; Institute for Clinical Diabetology, German Diabetes Center, Leibniz Institute for Diabetes Research, Heinrich Heine University, Düsseldorf, Germany; and Department of Endocrinology and Diabetology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Annette Schürmann
- Department of Experimental Diabetology, German Institute of Human Nutrition (DIfE), Nuthetal, Germany; German Center for Diabetes Research, Neuherberg, Germany;
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Schwenk R, Lubura M, Hesse D, Baumeier C, Kluth O, Kraemer M, Hallahan N, John C, Scheja L, Heeren J, Schürmann A. Erhöhter Schutz der β-Zelle und Reduktion des Leberfetts durch 17β-Estradiol-Behandlung Diabetes-suszeptibler NZO-Mäuse. DIABETOL STOFFWECHS 2015. [DOI: 10.1055/s-0035-1549818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hild S, Graeff C, Trautmann J, Kraemer M, Zink K, Durante M, Bert C. Fast optimization and dose calculation in scanned ion beam therapy. Med Phys 2014; 41:071703. [DOI: 10.1118/1.4881522] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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30
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Berlit P, Kraemer M. Cerebral vasculitis in adults: what are the steps in order to establish the diagnosis? Red flags and pitfalls. Clin Exp Immunol 2014; 175:419-24. [PMID: 24117125 DOI: 10.1111/cei.12221] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2013] [Indexed: 12/29/2022] Open
Abstract
Cerebral vasculitis is a rare cause of juvenile stroke. It may occur as primary angiitis of the central nervous system (PACNS) or as CNS manifestation in the setting of systemic vasculitis. Clinical hints for vasculitis are headache, stroke, seizures, encephalopathy and signs of a systemic inflammatory disorder. Diagnostic work-up includes anamnesis, whole body examination, laboratory and cerebral spinal fluid (CSF) studies, magnetic resonance imaging (MRI), angiography and brain biopsy. Due to the rarity of the disease, exclusion of more frequent differential diagnoses is a key element of diagnostic work -up. This review summarizes the steps that lead to the diagnosis of cerebral vasculitis and describes the red flags and pitfalls. Despite considering the dilemma of angiography-negative vasculitis and false-negative brain biopsy in some cases, it is important to protect patients from 'blind' immunosuppressive therapy in unrecognized non-inflammatory differential diagnosis.
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Affiliation(s)
- P Berlit
- Department of Neurology, Alfried Krupp Hospital, Essen, Germany
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Frey K, Bauer J, Unholtz D, Kurz C, Kraemer M, Bortfeld T, Parodi K. TH-C-144-06: TPS PET
- A TPS-Based Approach for In-Vivo Dose Verification with PET in Proton Therapy. Med Phys 2013. [DOI: 10.1118/1.4815800] [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: 11/07/2022] Open
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32
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Becker J, Kraemer M, Stracke CP, Keyvani K, Berlit P. Atypical MRI Findings in a Spinal Dural Arteriovenous Fistula - Histology as Clue to the Diagnosis (P05.258). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p05.258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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33
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Kraemer M, Schuknecht B, Jetzer AK, Yonekawa Y, Khan N. Postoperative changes in the superficial temporal artery and the external carotid artery duplex sonography after extra-intracranial bypass surgery in European Moyamoya disease. Clin Neurol Neurosurg 2012; 114:930-4. [PMID: 22480619 DOI: 10.1016/j.clineuro.2012.02.004] [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] [Received: 10/15/2011] [Revised: 12/06/2011] [Accepted: 02/06/2012] [Indexed: 11/25/2022]
Abstract
INTRODUCTION Despite Duplex ultrasonography being a noninvasive, easily repeatable, readily available and economical tool, this examination and its normal ranges are rarely described in Moyamoya disease (MMD). METHODS Duplex ultrasonography examinations of the superficial temporal artery (STA) and external carotid artery (ECA) were performed preoperatively, postoperatively (within 30 days) and as follow-up exams (6 months postoperatively) after 32 cerebral revascularization procedures in 20 European patients with MMD. RESULTS A significant higher mean diastolic flow of STA compared to preoperative values was found in postoperative (p<.000) and follow-up exams (p<.001) in Duplex ultrasonography. Postoperative and follow-up Duplex sonography of STA also showed a significantly higher mean systolic flow compared to preoperative values (p<.05 and p<.05). Also ECA showed significantly changes after bypass surgery (p<.05). CONCLUSION Duplex ultrasonography of STA is a reliable and non-invasive tool to investigate hemodynamic changes after bypass surgery and to detect bypass patency in European patients with MMD.
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Affiliation(s)
- M Kraemer
- Department of Neurology, Alfried Krupp Hospital, Germany.
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Kraemer M, Kraft-Weyrather W, Scifoni E, Durante M. 200 ADAPTIVE TREATMENT PLANNING WITH TRIP98. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)70170-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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36
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Affiliation(s)
- M. Kraemer
- Department of Neurology, Alfried‐Krupp‐von Bohlen und Halbach Hospital, Alfried‐Krupp‐Straße, Essen
| | - F. M. Heinemann
- Institute for Transfusion Medicine, University Hospital Essen, University of Duisburg‐Essen, Virchowstraße, Essen
| | - P. A. Horn
- Institute for Transfusion Medicine, University Hospital Essen, University of Duisburg‐Essen, Virchowstraße, Essen
| | - C. Venker
- Department of Neurology, Alfried‐Krupp‐von Bohlen und Halbach Hospital, Alfried‐Krupp‐Straße, Essen
| | - P. Berlit
- Department of Neurology, Alfried‐Krupp‐von Bohlen und Halbach Hospital, Alfried‐Krupp‐Straße, Essen
| | - B. Krischek
- Department of Neurosurgery, University Clinic of Tübingen, Hoppe‐Seyler‐Straße, Tübingen, Germany
| | - N. Khan
- Moyamoya Clinic, Children′s University Hospital, Zurich, Steinwiesstraße, Zurich, Switzerland
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Keller CN, Picke D, Kraemer M. Fistelspaltung und primäre Sphinkterrekonstruktion zur Behandlung von Analfisteln. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289025] [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: 10/16/2022]
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Kraemer M, Berlit P, Diesner F, Khan N. What is the expert's option on antiplatelet therapy in moyamoya disease? Results of a worldwide Survey. Eur J Neurol 2011; 19:163-7. [DOI: 10.1111/j.1468-1331.2011.03481.x] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kraemer M, Haertig S, Hill A, Uekermann J, Wiltfang J, Kis B. [Huntington's chorea mimicking adult attention deficit hyperactivity disorder]. Nervenarzt 2011; 82:360-362. [PMID: 21308357 DOI: 10.1007/s00115-011-3251-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Affiliation(s)
- M Kraemer
- Klinik für Psychiatrie und Psychotherapie, LVR-Klinikum Essen, Universität Duisburg-Essen, Essen, Deutschland
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Mette C, Grabemann M, Zimmermann M, Kraemer M, Zepf F, Suchan B, Wiltfang J, Kis B, Uekermann J. A diminished serotonin level influences the performance in a modified AX-continuous performance task in adult ADHD. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72137-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
IntroductionAttention deficit disorder (ADHD) is a psychiatric disorder, which is characterized by deficits of executive functions (EF) and impulsivity. Whereas a variety of studies on the involvement of the dopaminergic system in ADHD exists, the impact of the serotonergic system to EF in ADHD in adults is underinvestigated.AimsTo ascertain the effects of rapid tryptophan depletion (RTD) and the resultant reduction of the central nervous levels of serotonin on the EF of male adult patients with ADHD.Methods20 ADHD patients and 20 healthy controls completed the RTD test on one day and a placebo on another day in a double-blind within subject crossover design.- In addition, the subtest alertness of the TAP and a modified Version of the Continuous performance test (AX-CPT) with three stimulus conditions (AX, AY, BX) were administered.ResultsStatistical analysis revealed significant shorter reaction times, more errors and more omission errors in the ADHD group in the AX-CPT. The omissions error rate increased in both groups in the RTD condition but not in the placebo condition. Statistical analyses did not yield any significant differences between groups in the subtest alertness and no significant interaction of group and effect of the RTD condition could be observed.ConclusionsIn addition to higher impulsivity of patients with ADHD as reflected by shorter reaction times and higher error rates, the results of the present study imply an involvement of the serotonergic system as reflected by RTD in sustained and selective attention.
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Andersson Grönlund M, Dahlgren J, Aring E, Kraemer M, Hellström A. Ophthalmological findings in children and adolescents with Silver-Russell syndrome. Br J Ophthalmol 2010; 95:637-41. [PMID: 20805133 DOI: 10.1136/bjo.2010.184457] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To evaluate ophthalmological findings in children with Silver-Russell syndrome (SRS). METHODS An ophthalmological evaluation including visual acuity (VA), refraction, strabismus, near point of convergence (NPC), slit-lamp examination, ophthalmoscopy, axial length measurements and full-field electroretinogram was performed on 18 children with SRS (8 girls, 10 boys; mean age 11.6 years). Fundus photographs were taken for digital image analysis. Data were compared with data on an age- and gender-matched reference group (ref) of school children (n=99). RESULTS Seventeen out of 18 children with SRS had ophthalmological abnormalities. Best corrected VA of the best eye was <0.1 log of the minimal angle of resolution in 11 children (ref n=98) (p<0.0001), and 11 children had refractive errors (ref n=33) (p=0.05). Anisometropia (≥1 dioptre) was noted in three of the children (ref n=3) (p=0.046). Subnormal stereo acuity and NPC were found in 2/16 (ref=0) (p=0.02). The total axial length in both eyes was shorter compared with that in controls (p<0.006 and p<0.001). Small optic discs were found in 3/16, large cup in 3/16 and increased tortuosity of retinal vessels in 4/13 children with SRS. CONCLUSION Children with SRS, who are severely intrauterine growth retarded, show significant ophthalmological abnormalities. Based on the present findings, ophthalmological examination is recommended in children with SRS.
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Affiliation(s)
- M Andersson Grönlund
- Institute of Neuroscience and Physiology/Ophthalmology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
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Uekermann J, Kraemer M, Abdel-Hamid M, Schimmelmann BG, Hebebrand J, Daum I, Wiltfang J, Kis B. Social cognition in attention-deficit hyperactivity disorder (ADHD). Neurosci Biobehav Rev 2009; 34:734-43. [PMID: 19857516 DOI: 10.1016/j.neubiorev.2009.10.009] [Citation(s) in RCA: 246] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2009] [Revised: 10/06/2009] [Accepted: 10/18/2009] [Indexed: 12/21/2022]
Abstract
UNLABELLED Attention-deficit hyperactivity disorder (ADHD) is associated with a range of cognitive deficits and social cognition impairments, which might be interpreted in the context of fronto-striatal dysfunction. So far only few studies have addressed the issue of social cognition deficits in ADHD. METHOD Medline and Psyclit searches were performed for a 30-year period (1979-2009) using the words 'ADHD' and 'social cognition', 'theory of mind', 'prosody', 'face perception', 'humour' or 'social information processing'. Inclusion criteria consisted of a diagnosis according to DSM as well as the inclusion of a control group or a follow-up assessment following the treatment with methylphenidate. RESULTS ADHD is clearly associated with social cognition impairments involving emotional face and prosody perception. Although the database is sparse so far, there is some evidence for theory of mind deficits and reduced empathy in ADHD. CONCLUSIONS In summary, the social cognition impairments are consistent with fronto-striatal dysfunction in ADHD, but other functional networks of brain areas also appear to be implicated.
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Affiliation(s)
- J Uekermann
- LVR Clinics Essen, University of Duisburg-Essen, Department of Psychiatry and Psychotherapy, Essen, Germany.
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Kraemer M, Schormann T, Dabringhaus A, Hirsch J, Gass A. Chronic changes in brain volume in MS patients: individual analysis and group data as assessed using Voxel-Guided Morphometry. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)70453-7] [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] Open
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Kasina JM, Mburu J, Kraemer M, Holm-Mueller K. Economic benefit of crop pollination by bees: a case of Kakamega small-holder farming in western Kenya. J Econ Entomol 2009; 102:467-73. [PMID: 19449623 DOI: 10.1603/029.102.0201] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
In most developing countries, crop production is by small scale farmers, who mainly produce for their own consumption and the extra for market. Pollination in such systems is unmanaged and is usually incidental, supported by nearby ecosystems. One of the reasons of not managing pollination is the lack of understanding of its economic value. The "public-good" nature of pollination in these systems also discourages individual initiatives intended to conserve pollinators. We evaluate the economic returns from bee pollination in small-holder farming systems. To do this we apply the factor of production method, a form of revealed preferences methods available for valuing ecosystem services. Our analyses show that bee pollination enhances the yield of most crops grown in the farmland and improves immensely the quality of produce. Almost 40% of the annual value of crops under consideration represented the net returns derived from bee pollination. More than 99% of this benefit is attributed to pollination by feral bees. We provide in-depth valuation of pollination service and discuss applicability and limitations of the factor of production method in developing countries.
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Affiliation(s)
- J M Kasina
- Kenya Agricultural Research Institute-National Agricultural Research Laboratories. P.O. Box 14733, 00800 Nairobi, Kenya.
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Kraemer M, Schormann T, Dabringhaus A, Hirsch J, Stephan K, Hömberg V, Kappos L, Gass A. 186. Individual assessment of chronic brain tissue changes in MRI – The role of focal lesions for brain atrophy development. A voxel-guided morphometry study. Clin Neurophysiol 2009. [DOI: 10.1016/j.clinph.2008.07.184] [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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Abstract
PURPOSE Infliximab may represent an adjuvant to surgical therapy in patients with severe anal Crohn's disease as it has been shown to affect rapid remissions in a proportion of cases. PATIENTS AND METHODS Nineteen patients underwent infliximab therapy 5 mg/kg perioperatively to scheduled anal reconstructive surgery for complicated fistulising anal Crohn's disease. RESULTS One adverse event was recorded (generalised exanthema with subsequent resolution). Eight patients showed complete clinical remission refusing further surgery. One of the eight relapsed during follow-up and was continued on infliximab. Surgery consisted of advancement flaps. It was successful at first attempt in nine of the remaining 11 patients (82%). Operative fistula closure remained unsuccessful in two patients. Overall, 16 of 19 patients (84%) with advanced anal Crohn's disease had a favourable outcome. CONCLUSION The use of infliximab as adjuvant to surgery in this series of patients with complicated anal Crohn's disease was safe. Although the data is uncontrolled a positive effect of infliximab on the outcome of surgery may be postulated since our results compare favourably with other studies.
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Affiliation(s)
- M Kraemer
- Abteilung Allgemeine und Viszeralchirurgie, Koloproktologie, St. Barbara-Klinik Hamm-Heessen GmbH, Am Heessener Wald 1, 59073 Hamm, Germany.
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Kraemer M, Schormann T, Dabringhaus A, Hirsch J, Stephan KM, Hömberg V, Kappos L, Gass A. Individual assessment of chronic brain tissue changes in MRI – the role of focal lesions for brain atrophy development. A Voxel-Guided Morphometry study. KLIN NEUROPHYSIOL 2008. [DOI: 10.1055/s-2008-1072980] [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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Kraemer M, Stephan K, Schormann T, Seitz R. Voxel-guided morphometry reveals discordance between progressive delayed brain atrophy and clinical recovery after middle cerebral artery infarction. Clin Neurophysiol 2007. [DOI: 10.1016/j.clinph.2006.11.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Iwase H, Gunzert-Marx K, Haettner E, Schardt D, Gutermuth F, Kraemer M, Kraft G. Experimental and theoretical study of the neutron dose produced by carbon ion therapy beams. Radiat Prot Dosimetry 2007; 126:615-8. [PMID: 17522032 DOI: 10.1093/rpd/ncm140] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
High-energy (12)C ions offer favourable conditions for the treatment of deep-seated local tumours. Several facilities for the heavy ion therapy are planned or under construction, for example the new clinical ion-therapy unit HIT at the Radiological University Clinics in Heidelberg. In order to improve existing treatment planning models, it is essential to evaluate the secondary fragment production and to include these contributions to the therapy dose with higher accuracy. Secondary neutrons are most abundantly produced in the reactions between (12)C beams and tissues. The dose contribution to tissues by a neutron is fairly small compared with the projectile and the other charged fragments due to no ionisation and the small reaction cross-sections; however, it distributes in a considerably wider region beyond the bragg-peak because of the strong penetrability. Systematic data on energy spectra and doses of secondary neutrons produced by (12)C beams using water targets of different thicknesses for various detection angles have therefore been measured in this study at GSI Darmstadt.
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Affiliation(s)
- H Iwase
- Biophysics, GSI, Darmstadt, Germany.
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Abstract
In patients with end stage renal failure, control of the fluid status of the body is lost and fluid accumulates continuously. By dialysis therapy, excess fluid can be removed, but there are no reliable methods to establish the amount of excess fluid to be removed. Severe and even lethal complications may be the consequence of longer term deviations from a normal fluid status in dialysis patients, but also in other patient groups. Therefore, a large medical need exists for a precise and pragmatic method to determine fluid status. Bioimpedance measurement, today mainly used for nutrition status assessment, is regarded as an interesting candidate method for fluid status determination. This paper presents a four-compartment model of the human body, developed to derive information on fluid status from extra- and intracellular volumes measured by bioimpedance spectroscopy. The model allows us to determine weights of each of four compartments (overhydration, fat, muscle and remaining 'basic' components) by analyzing extra- and intracellular water volumes in different tissues of the body. Thereby fluid status (overhydration volume, normohydrated weight of the patient) as well as nutrition and fitness status (lean body, fat and muscle mass) can be determined quantitatively from a single measurement. A preliminary evaluation of the performance of a system consisting of a bioimpedance spectrum analyzer and the four-compartment model is also provided.
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Affiliation(s)
- M Kraemer
- Fresenius Biotech GmbH, Else-Kroener-Str. 1, 61352 Bad Homburg, Germany.
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