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Stevens NA, Lankisch K, Draguhn A, Engelhardt M, Both M, Thome C. Increased Interhemispheric Connectivity of a Distinct Type of Hippocampal Pyramidal Cells. J Neurosci 2024; 44:e0440232023. [PMID: 38123997 PMCID: PMC10869156 DOI: 10.1523/jneurosci.0440-23.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 11/02/2023] [Accepted: 11/19/2023] [Indexed: 12/23/2023] Open
Abstract
Neurons typically generate action potentials at their axon initial segment based on the integration of synaptic inputs. In many neurons, the axon extends from the soma, equally weighting dendritic inputs. A notable exception is found in a subset of hippocampal pyramidal cells where the axon emerges from a basal dendrite. This structure allows these axon-carrying dendrites (AcDs) a privileged input route. We found that in male mice, such cells in the CA1 region receive stronger excitatory input from the contralateral CA3, compared with those with somatic axon origins. This is supported by a higher count of putative synapses from contralateral CA3 on the AcD. These findings, combined with prior observations of their distinct role in sharp-wave ripple firing, suggest a key role of this neuron subset in coordinating bi-hemispheric hippocampal activity during memory-centric oscillations.
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Affiliation(s)
- Nikolas Andreas Stevens
- Institute of Physiology and Pathophysiology, Heidelberg University, 69120 Heidelberg, Germany
| | - Katja Lankisch
- Institute of Physiology and Pathophysiology, Heidelberg University, 69120 Heidelberg, Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, Heidelberg University, 69120 Heidelberg, Germany
| | - Maren Engelhardt
- Institute of Anatomy and Cell Biology, Medical Faculty, Johannes Kepler University Linz, 4020 Linz, Austria
| | - Martin Both
- Institute of Physiology and Pathophysiology, Heidelberg University, 69120 Heidelberg, Germany
| | - Christian Thome
- Institute of Physiology and Pathophysiology, Heidelberg University, 69120 Heidelberg, Germany
- Institute of Anatomy and Cell Biology, Medical Faculty, Johannes Kepler University Linz, 4020 Linz, Austria
- Institute of Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, California 94305
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2
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Brito DVC, Kupke J, Sokolov R, Cambridge S, Both M, Bengtson CP, Rozov A, Oliveira AMM. Biphasic Npas4 expression promotes inhibitory plasticity and suppression of fear memory consolidation in mice. Mol Psychiatry 2024:10.1038/s41380-024-02454-3. [PMID: 38347124 DOI: 10.1038/s41380-024-02454-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 01/17/2024] [Accepted: 01/23/2024] [Indexed: 02/19/2024]
Abstract
Long-term memories are believed to be encoded by unique transcriptional signatures in the brain. The expression of immediate early genes (IEG) promotes structural and molecular changes required for memory consolidation. Recent evidence has shown that the brain is equipped with mechanisms that not only promote, but actively constrict memory formation. However, it remains unknown whether IEG expression may play a role in memory suppression. Here we uncovered a novel function of the IEG neuronal PAS domain protein 4 (Npas4), as an inducible memory suppressor gene of highly salient aversive experiences. Using a contextual fear conditioning paradigm, we found that low stimulus salience leads to monophasic Npas4 expression, while highly salient learning induces a biphasic expression of Npas4 in the hippocampus. The later phase requires N-methyl-D-aspartate (NMDA) receptor activity and is independent of dopaminergic neurotransmission. Our in vivo pharmacological and genetic manipulation experiments suggested that the later phase of Npas4 expression restricts the consolidation of a fear memory and promote behavioral flexibility, by facilitating fear extinction and the contextual specificity of fear responses. Moreover, immunofluorescence and electrophysiological analysis revealed a concomitant increase in synaptic input from cholecystokinin (CCK)-expressing interneurons. Our results demonstrate how salient experiences evoke unique temporal patterns of IEG expression that fine-tune memory consolidation. Moreover, our study provides evidence for inducible gene expression associated with memory suppression as a possible mechanism to balance the consolidation of highly salient memories, and thereby to evade the formation of maladaptive behavior.
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Affiliation(s)
- David V C Brito
- Department of Neurobiology, Interdisciplinary Center for Neurosciences (IZN), Heidelberg University, 69120, Heidelberg, Germany
- ABC-RI, Algarve Biomedical Center Research Institute, 8005-139, Faro, Portugal
- Faculdade de Medicina e Ciências Biomédicas, Universidade do Algarve, 8005-139, Faro, Portugal
| | - Janina Kupke
- Department of Neurobiology, Interdisciplinary Center for Neurosciences (IZN), Heidelberg University, 69120, Heidelberg, Germany
- Department of Molecular and Cellular Neurobiology, Center for Neurogenomics and Cognitive Research, Amsterdam Neuroscience, Vrije Universiteit Amsterdam, Amsterdam, 1081 HV, the Netherlands
| | - Rostilav Sokolov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 117997, Moscow, Russia
- Federal Center of Brain Research and Neurotechnology, 117513, Moscow, Russia
- Institute of Neuroscience, Lobachevsky State University of Nizhniy Novgorod, Nizhny, Novgorod, Russia
| | - Sidney Cambridge
- Anatomy II, Dr. Senckenberg Anatomy, Goethe-University Frankfurt, 60590, Frankfurt am Main, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, 69120, Heidelberg, Germany
| | - C Peter Bengtson
- Department of Neurobiology, Interdisciplinary Center for Neurosciences (IZN), Heidelberg University, 69120, Heidelberg, Germany
| | - Andrei Rozov
- Federal Center of Brain Research and Neurotechnology, 117513, Moscow, Russia
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, 69120, Heidelberg, Germany
- OpenLab of Neurobiology, Kazan Federal University, 420008, Kazan, Russia
| | - Ana M M Oliveira
- Department of Neurobiology, Interdisciplinary Center for Neurosciences (IZN), Heidelberg University, 69120, Heidelberg, Germany.
- Department of Molecular and Cellular Cognition Research, Central Institute of Mental Health, Medical Faculty Mannheim, Heidelberg University, 68159, Mannheim, Germany.
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Ravesh MS, Langguth P, Moritz JD, Rinne K, Harneit PL, Schulze-Nagel J, Graessner J, Uebing A, Jansen O, Both M, Hansen JH. Fontan-Associated Liver Disease: Quantification and Visualization of Abdominal Hemodynamics by 4D Flow MRI. Thorac Cardiovasc Surg 2023. [DOI: 10.1055/s-0043-1761859] [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: 03/22/2023]
Affiliation(s)
- M. Salehi Ravesh
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - P. Langguth
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - J. D. Moritz
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - K. Rinne
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - P. L. Harneit
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - J. Schulze-Nagel
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | | | - A. Uebing
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - O. Jansen
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - M. Both
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
| | - J. H. Hansen
- University Hospital Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
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Langguth P, Aludin S, Horr A, Campbell GM, Lebenatus A, Salehi Ravesh M, Schunk D, Austein F, Larsen N, Syrek H, Both M, Jansen O, Sedaghat S. Iodine uptake of adrenal glands: A novel and reliable spectral dual-layer computed tomographic-derived biomarker for acute septic shock. Eur J Radiol 2022; 156:110492. [PMID: 36108480 DOI: 10.1016/j.ejrad.2022.110492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 08/09/2022] [Accepted: 08/15/2022] [Indexed: 11/26/2022]
Abstract
OBJECTIVES Septic shock is a potentially fatal condition. This study aims to assess whether iodine uptake and iodine density of abdominal organs on dual-layer spectral detector computed tomography (SDCT) could serve as a new imaging biomarker for patients in septic shock. METHODS Here, 95 patients who received contrast-enhanced abdominal CT examinations were included and separated into two groups: group A - septic shock; group B - no shock condition. Preselected abdominal (right and left adrenal gland, right and left kidney, infrarenal inferior vena cava (IVC), pancreas, spleen, and liver) localizations were independently evaluated by two radiologists, who measured iodine concentrations (mg/ml) and Hounsfield units (HU). RESULTS In all, 1520 measurements of iodine concentrations in mg/ml and HU were performed, with 27 patients in group A and 68 in group B. Iodine concentrations in mg/ml and HU correlated significantly in all organs measured. The corresponding correlation coefficient (r) ranged from 0.809 (pancreas) to 0.963 (right kidney). Inter-rater reliability (IRR) was very good for mg/ml (κ = 0.8; p < 0.01) and good for HU (κ = 0.773; p < 0.01) measurements. The mean iodine concentration and HU of the adrenal glands in septic and nonseptic patients was 4.88 ± 1.16 mg/ml/153 ± 36 HU and 2.67 ± 1.07 mg/ml/112 ± 41 HU, respectively. Iodine concentrations in the adrenal glands were significantly higher in group A than in group B patients (p < 0.01). The other organs remained unaffected and no significant difference was observed between patients in group A and B. Patients in group A presented significantly more often with an iodine uptake of >3.5 mg/ml of one adrenal gland (sensitivity = 0.926, specificity = 0.849, AUC = 0.951) or/and a combined concentration of >7 mg/ml of both adrenal glands (sensitivity = 0.889, specificity = 0.836, AUC = 0.928). CONCLUSION SDCT-derived iodine concentration of the adrenal glands could serve as a novel imaging biomarker for patients in acute septic shock. Our data suggest that an iodine uptake of >3.5 mg/ml of at least one adrenal gland or a combined iodine uptake of >7 mg/ml in both adrenal glands identifies patients in this condition.
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Affiliation(s)
- P Langguth
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany.
| | - S Aludin
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - A Horr
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | | | - A Lebenatus
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - M Salehi Ravesh
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - D Schunk
- Department for Interdisciplinary Emergency, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - F Austein
- Department of Diagnostic and Interventional Neuroradiology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - N Larsen
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - H Syrek
- Mediri GmbH, Heidelberg, Germany
| | - M Both
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - O Jansen
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany
| | - S Sedaghat
- Department for Radiology and Neuroradiology, University Hospital Schleswig-Holstein, Campus Kiel, Germany; Department of Radiology, University of California San Diego, San Diego, CA, United States
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Hodapp A, Kaiser ME, Thome C, Ding L, Rozov A, Klumpp M, Stevens N, Stingl M, Sackmann T, Lehmann N, Draguhn A, Burgalossi A, Engelhardt M, Both M. Dendritic axon origin enables information gating by perisomatic inhibition in pyramidal neurons. Science 2022; 377:1448-1452. [PMID: 36137045 DOI: 10.1126/science.abj1861] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Information processing in neuronal networks involves the recruitment of selected neurons into coordinated spatiotemporal activity patterns. This sparse activation results from widespread synaptic inhibition in conjunction with neuron-specific synaptic excitation. We report the selective recruitment of hippocampal pyramidal cells into patterned network activity. During ripple oscillations in awake mice, spiking is much more likely in cells in which the axon originates from a basal dendrite rather than from the soma. High-resolution recordings in vitro and computer modeling indicate that these spikes are elicited by synaptic input to the axon-carrying dendrite and thus escape perisomatic inhibition. Pyramidal cells with somatic axon origin can be activated during ripple oscillations by blocking their somatic inhibition. The recruitment of neurons into active ensembles is thus determined by axonal morphological features.
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Affiliation(s)
- Alexander Hodapp
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Martin E Kaiser
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Christian Thome
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany.,Institute of Anatomy and Cell Biology, Medical Faculty, Johannes Kepler University, Linz, Austria.,Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, CA, USA
| | - Lingjun Ding
- Institute of Neurobiology, University of Tübingen, Tübingen, Germany.,Werner-Reichardt Centre for Integrative Neuroscience, Tübingen, Germany.,Graduate Training Centre of Neuroscience, IMPRS, Tübingen, Germany
| | - Andrei Rozov
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany.,Federal Center of Brain Research and Neurotechnologies, Moscow, Russian Federation.,OpenLab of Neurobiology, Kazan Federal University, Kazan, Russian Federation
| | - Matthias Klumpp
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Nikolas Stevens
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Moritz Stingl
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Tina Sackmann
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Nadja Lehmann
- Institute of Neuroanatomy, Mannheim Center for Translational Neuroscience (MCTN), Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
| | - Andrea Burgalossi
- Institute of Neurobiology, University of Tübingen, Tübingen, Germany.,Werner-Reichardt Centre for Integrative Neuroscience, Tübingen, Germany
| | - Maren Engelhardt
- Institute of Anatomy and Cell Biology, Medical Faculty, Johannes Kepler University, Linz, Austria.,Institute of Neuroanatomy, Mannheim Center for Translational Neuroscience (MCTN), Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, Medical Faculty, Heidelberg University, Heidelberg, Germany
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6
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Landeck L, Kaiser ME, Hefter D, Draguhn A, Both M. Enriched Environment Modulates Sharp Wave-Ripple (SPW-R) Activity in Hippocampal Slices. Front Neural Circuits 2021; 15:758939. [PMID: 34924964 PMCID: PMC8678456 DOI: 10.3389/fncir.2021.758939] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Accepted: 11/15/2021] [Indexed: 11/29/2022] Open
Abstract
Behavioral flexibility depends on neuronal plasticity which forms and adapts the central nervous system in an experience-dependent manner. Thus, plasticity depends on interactions between the organism and its environment. A key experimental paradigm for studying this concept is the exposure of rodents to an enriched environment (EE), followed by studying differences to control animals kept under standard conditions (SC). While multiple changes induced by EE have been found at the cellular-molecular and cognitive-behavioral levels, little is known about EE-dependent alterations at the intermediate level of network activity. We, therefore, studied spontaneous network activity in hippocampal slices from mice which had previously experienced EE for 10–15 days. Compared to control animals from standard conditions (SC) and mice with enhanced motor activity (MC) we found several differences in sharp wave-ripple complexes (SPW-R), a memory-related activity pattern. Sharp wave amplitude, unit firing during sharp waves, and the number of superimposed ripple cycles were increased in tissue from the EE group. On the other hand, spiking precision with respect to the ripple oscillations was reduced. Recordings from single pyramidal cells revealed a reduction in synaptic inhibition during SPW-R together with a reduced inhibition-excitation ratio. The number of inhibitory neurons, including parvalbumin-positive interneurons, was unchanged. Altered activation or efficacy of synaptic inhibition may thus underlie changes in memory-related network activity patterns which, in turn, may be important for the cognitive-behavioral effects of EE exposure.
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Affiliation(s)
- Lucie Landeck
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Martin E Kaiser
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Dimitri Hefter
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany.,RG Animal Models in Psychiatry, Department of Psychiatry and Psychotherapy, Central Institute of Mental Health, Medical Faculty Mannheim, University of Heidelberg, Heidelberg, Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
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7
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Elzoheiry S, Lewen A, Schneider J, Both M, Hefter D, Boffi JC, Hollnagel JO, Kann O. Mild metabolic stress is sufficient to disturb the formation of pyramidal cell ensembles during gamma oscillations. J Cereb Blood Flow Metab 2020; 40:2401-2415. [PMID: 31842665 PMCID: PMC7820691 DOI: 10.1177/0271678x19892657] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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] [Indexed: 01/09/2023]
Abstract
Disturbances of cognitive functions occur rapidly during acute metabolic stress. However, the underlying mechanisms are not fully understood. Cortical gamma oscillations (30-100 Hz) emerging from precise synaptic transmission between excitatory principal neurons and inhibitory interneurons, such as fast-spiking GABAergic basket cells, are associated with higher brain functions, like sensory perception, selective attention and memory formation. We investigated the alterations of cholinergic gamma oscillations at the level of neuronal ensembles in the CA3 region of rat hippocampal slice cultures. We combined electrophysiology, calcium imaging (CamKII.GCaMP6f) and mild metabolic stress that was induced by rotenone, a lipophilic and highly selective inhibitor of complex I in the respiratory chain of mitochondria. The detected pyramidal cell ensembles showing repetitive patterns of activity were highly sensitive to mild metabolic stress. Whereas such synchronised multicellular activity diminished, the overall activity of individual pyramidal cells was unaffected. Additionally, mild metabolic stress had no effect on the rate of action potential generation in fast-spiking neural units. However, the partial disinhibition of slow-spiking neural units suggests that disturbances of ensemble formation likely result from alterations in synaptic inhibition. Our study bridges disturbances on the (multi-)cellular and network level to putative cognitive impairment on the system level.
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Affiliation(s)
- Shehabeldin Elzoheiry
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Andrea Lewen
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Justus Schneider
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Dimitri Hefter
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany.,RG Animal Models in Psychiatry, Clinic of Psychiatry and Psychotherapy, Central Institute of Mental Health, Mannheim, Germany
| | - Juan Carlos Boffi
- Institute for Anatomy and Cell Biology, University of Heidelberg, Heidelberg, Germany
| | - Jan-Oliver Hollnagel
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany
| | - Oliver Kann
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany.,Interdisciplinary Centre for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
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8
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Wipfler-Freißmuth E, Dejaco C, Both M. [Long-term complications, monitoring and interventional treatment of large vessel vasculitis]. Z Rheumatol 2020; 79:523-531. [PMID: 32430565 DOI: 10.1007/s00393-020-00807-1] [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] [Indexed: 11/25/2022]
Abstract
Giant cell arteritis (GCA) and Takayasu's arteritis (TAK) both belong to the group of large vessel vasculitides and require long-term drug treatment. Glucocorticoids (GC) are the first choice for the treatment of both diseases. For GCA immunosuppressants, such as tocilizumab or methotrexate should be considered in cases of treatment refractory and relapses or if there is a high risk for GC-related adverse events. In TAK patients the use of immunosuppressive agents should be considered for all patients. In the course of the disease, severe disease-associated and treatment-associated complications can occur. The most frequent disease-associated complications include visual impairment up to blindness in GCA, as well as vascular stenoses with ischemia and aortic aneurysms with possible dissection in GCA and TAK. Percutaneous transluminal angioplasty (PTA) and stenting are minimally invasive, low-risk interventional procedures for GCA and TAK patients with clinically significant vascular stenoses, despite a tendency to restenosis. Interventional procedures should be weighed up against vascular surgical approaches depending on the localization and the total clinical situation. All interventions should be conducted in a phase of stable remission when possible. For monitoring of disease activity in patients with GCA and TAK, assessment of clinical manifestations as well as C‑reactive protein (CRP) and the erythrocyte sedimentation rate (ESR) are useful; however, both are unreliable under interleukin‑6 block with tocilizumab. The value of new biomarkers independent from interleukin‑6 and the importance of imaging (sonography, magnetic resonance angiography, computed tomography and positron emission tomography-CT) for monitoring GCA and TAK still have to be investigated in future studies.
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Affiliation(s)
- E Wipfler-Freißmuth
- Rheumatologische Spezialambulanz, Krankenhaus der Barmherzigen Brüder Graz-Eggenberg, Bergstr. 27, 8010, Graz, Österreich.
| | - C Dejaco
- Landesweiter Dienst für Rheumatologie, Südtiroler Sanitätsbetrieb, Krankenhaus Bruneck, Bruneck, Italien
| | - M Both
- Klinik für Radiologie und Neuroradiologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Kiel, Deutschland
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9
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Geschwill P, Kaiser ME, Grube P, Lehmann N, Thome C, Draguhn A, Hollnagel JO, Both M. Synchronicity of excitatory inputs drives hippocampal networks to distinct oscillatory patterns. Hippocampus 2020; 30:1044-1057. [PMID: 32412680 DOI: 10.1002/hipo.23214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 11/27/2019] [Revised: 04/21/2020] [Accepted: 04/25/2020] [Indexed: 11/11/2022]
Abstract
The rodent hippocampus expresses a variety of neuronal network oscillations depending on the behavioral state of the animal. Locomotion and active exploration are accompanied by theta-nested gamma oscillations while resting states and slow-wave sleep are dominated by intermittent sharp wave-ripple complexes. It is believed that gamma rhythms create a framework for efficient acquisition of information whereas sharp wave-ripples are thought to be involved in consolidation and retrieval of memory. While not strictly mutually exclusive, one of the two patterns usually dominates in a given behavioral state. Here we explore how different input patterns induce either of the two network states, using an optogenetic stimulation approach in hippocampal brain slices of mice. We report that the pattern of the evoked oscillation depends strongly on the initial synchrony of activation of excitatory cells within CA3. Short, synchronous activation favors the emergence of sharp wave-ripple complexes while persistent but less synchronous activity-as typical for sensory input during exploratory behavior-supports the generation of gamma oscillations. This dichotomy is reflected by different degrees of synchrony of excitatory and inhibitory synaptic currents within these two states. Importantly, the induction of these two fundamental network patterns does not depend on the presence of any neuromodulatory transmitter like acetylcholine, but is merely based on a different synchrony in the initial activation pattern.
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Affiliation(s)
- Pascal Geschwill
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Martin E Kaiser
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Paul Grube
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Nadja Lehmann
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Christian Thome
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Andreas Draguhn
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Jan-Oliver Hollnagel
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
| | - Martin Both
- Intitute for Physiology and Pathophysiology, University Heidelberg, Heidelberg, Germany
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10
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Peters S, Huhndorf M, Jensen-Kondering U, Larsen N, Koktzoglou I, Edelman RR, Graessner J, Both M, Jansen O, Salehi Ravesh M. Non-Contrast-Enhanced Carotid MRA: Clinical Evaluation of a Novel Ungated Radial Quiescent-Interval Slice-Selective MRA at 1.5T. AJNR Am J Neuroradiol 2019; 40:1529-1537. [PMID: 31395666 DOI: 10.3174/ajnr.a6171] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 07/04/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Non-contrast-enhanced MRA techniques have experienced a renaissance due to the known correlation between the use of gadolinium-based contrast agents and the development of nephrogenic systemic fibrosis and the deposition of gadolinium in some brain regions. The purpose of this study was to assess the diagnostic performance of ungated non-contrast-enhanced radial quiescent-interval slice-selective MRA of the extracranial supra-aortic arteries in comparison with conventional contrast-enhanced MRA in patients with clinical suspicion of carotid stenosis. MATERIALS AND METHODS In this prospective study, both MRA pulse sequences were performed in 31 consecutive patients (median age, 68.8 years; 19 men). For the evaluation, the cervical arterial system was divided into 35 segments (right and left side). Three blinded reviewers separately evaluated these segments. An ordinal scoring system was used to assess the image quality of arterial segments and the stenosis grading of carotid arteries. RESULTS Overall venous contamination in quiescent-interval slice-selective MRA was rated as "none" by all readers in 84.9% of cases and in 8.1% of cases in contrast-enhanced MRA (P < .0001). The visualization quality of arterial segments was considered good to excellent in 40.2% for the quiescent-interval slice-selective MRA and in 52.2% for the contrast-enhanced MRA (P < .0001). The diagnostic accuracy of ungated quiescent-interval slice-selective MRA concerning the stenosis grading showed a total sensitivity and specificity of 85.7% and 90.0%, respectively. CONCLUSIONS Ungated quiescent-interval slice-selective MRA can be used clinically as an alternative to contrast-enhanced MRA without a significantly different image quality or diagnostic accuracy for the detection of carotid stenosis at 1.5T.
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Affiliation(s)
- S Peters
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | - M Huhndorf
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | - U Jensen-Kondering
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | - N Larsen
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | - I Koktzoglou
- Department of Radiology (I.K., R.R.E.), NorthShore University Health System, Evanston, Illinois.,University of Chicago Pritzker School of Medicine (I.K.), Chicago, Illinois
| | - R R Edelman
- Department of Radiology (I.K., R.R.E.), NorthShore University Health System, Evanston, Illinois.,Northwestern University Feinberg School of Medicine (R.R.E.), Chicago, Illinois
| | | | - M Both
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | - O Jansen
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
| | - M Salehi Ravesh
- From the Department of Radiology and Neuroradiology (S.P., M.H., U.J.-K., N.L., M.B., O.J., M.S.R.), University Medical Center Schleswig-Holstein, Kiel University, Kiel, Germany
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11
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Schneider J, Berndt N, Papageorgiou IE, Maurer J, Bulik S, Both M, Draguhn A, Holzhütter HG, Kann O. Local oxygen homeostasis during various neuronal network activity states in the mouse hippocampus. J Cereb Blood Flow Metab 2019; 39:859-873. [PMID: 29099662 PMCID: PMC6501513 DOI: 10.1177/0271678x17740091] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [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] [Indexed: 12/14/2022]
Abstract
Cortical information processing comprises various activity states emerging from timed synaptic excitation and inhibition. However, the underlying energy metabolism is widely unknown. We determined the cerebral metabolic rate of oxygen (CMRO2) along a tissue depth of <0.3 mm in the hippocampal CA3 region during various network activities, including gamma oscillations and sharp wave-ripples that occur during wakefulness and sleep. These physiological states associate with sensory perception and memory formation, and critically depend on perisomatic GABA inhibition. Moreover, we modelled vascular oxygen delivery based on quantitative microvasculature analysis. (1) Local CMRO2 was highest during gamma oscillations (3.4 mM/min), medium during sharp wave-ripples, asynchronous activity and isoflurane application (2.0-1.6 mM/min), and lowest during tetrodotoxin application (1.4 mM/min). (2) Energy expenditure of axonal and synaptic signaling accounted for >50% during gamma oscillations. (3) CMRO2 positively correlated with number and synchronisation of activated synapses, and neural multi-unit activity. (4) The median capillary distance was 44 µm. (5) The vascular oxygen partial pressure of 33 mmHg was needed to sustain oxidative phosphorylation during gamma oscillations. We conclude that gamma oscillations featuring high energetics require a hemodynamic response to match oxygen consumption of respiring mitochondria, and that perisomatic inhibition significantly contributes to the brain energy budget.
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Affiliation(s)
- Justus Schneider
- 1 Institute of Physiology and Pathophysiology, and Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
| | - Nikolaus Berndt
- 2 Computational Systems Biochemistry, Institute of Biochemistry, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ismini E Papageorgiou
- 1 Institute of Physiology and Pathophysiology, and Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
| | - Jana Maurer
- 1 Institute of Physiology and Pathophysiology, and Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
| | - Sascha Bulik
- 2 Computational Systems Biochemistry, Institute of Biochemistry, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Martin Both
- 1 Institute of Physiology and Pathophysiology, and Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
| | - Andreas Draguhn
- 1 Institute of Physiology and Pathophysiology, and Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
| | - Hermann-Georg Holzhütter
- 2 Computational Systems Biochemistry, Institute of Biochemistry, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Oliver Kann
- 1 Institute of Physiology and Pathophysiology, and Interdisciplinary Center for Neurosciences (IZN), University of Heidelberg, Heidelberg, Germany
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12
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Eisenhauer A, Müller M, Heuser A, Kolevica A, Glüer CC, Both M, Laue C, Hehn UV, Kloth S, Shroff R, Schrezenmeir J. Calcium isotope ratios in blood and urine: A new biomarker for the diagnosis of osteoporosis. Bone Rep 2019; 10:100200. [PMID: 30997369 PMCID: PMC6453776 DOI: 10.1016/j.bonr.2019.100200] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Accepted: 03/10/2019] [Indexed: 11/30/2022] Open
Abstract
We assessed the potential of Calcium (Ca) isotope fractionation measurements in blood (δ44/42CaBlood) and urine (δ44/42CaUrine) as a new biomarker for the diagnosis of osteoporosis. One hundred post-menopausal women aged 50 to 75 years underwent dual-energy X-ray absorptiometry (DXA), the gold standard for determination of bone mineral density. After exclusion of women with kidney failure and vitamin D deficiency (<25 nmol/l) 80 women remained in the study. Of these women 14 fulfilled the standard diagnostic criteria for osteoporosis based on DXA. Both the δ44/42CaBlood (p < 0.001) and δ44/42CaUrine (p = 0.004) values were significantly different in women with osteoporosis (δ44/42CaBlood: −0.99 ± 0.10‰, δ 44/42CaUrine: +0.10 ± 0.21‰, (Mean ± one standard deviation (SD), n = 14)) from those without osteoporosis (δ44/42CaBlood: −0.84 ± 0.14‰, δ44/42CaUrine: +0.35 ± 0.33‰, (SD), n = 66). This corresponded to the average Ca concentrations in morning spot urine samples ([Ca]Urine) which were higher (p = 0.041) in those women suffering from osteoporosis ([Ca]Urine-Osteoporosis: 2.58 ± 1.26 mmol/l, (SD), n = 14) than in the control group ([Ca]Urine-Control: 1.96 ± 1.39 mmol/l, (SD), n = 66). However, blood Ca concentrations ([Ca]Blood) were statistically indistinguishable between groups ([Ca]Blood, control: 2.39 ± 0.10 mmol/l (SD), n = 66); osteoporosis group: 2.43 ± 0.10 mmol/l (SD, n = 14) and were also not correlated to their corresponding Ca isotope compositions. The δ44/42CaBlood and δ44/42CaUrine values correlated significantly (p = 0.004 to p = 0.031) with their corresponding DXA data indicating that both Ca isotope ratios are biomarkers for osteoporosis. Furthermore, Ca isotope ratios were significantly correlated to other clinical parameters ([Ca]Urine, ([Ca]Urine/Creatinine)) and biomarkers (CRP, CTX/P1NP) associated with bone mineralization and demineralization. From regression analysis it can be shown that the δ44/42CaBlood values are the best biomarker for osteoporosis and that no other clinical parameters need to be taken into account in order to improve diagnosis. Cut-off values for discrimination of subjects suffering from osteoporosis were − 0.85‰ and 0.16‰ for δ44/42CaBlood and δ44/42CaUrine, respectively. Corresponding sensitivities were 100% for δ44/42CaBlood and ~79% for δ44/42CaUrine. Apparent specificities were ~55% for δ44/42CaBlood and ~71%. The apparent discrepancy in the number of diagnosed cases is reconciled by the different methodological approaches to diagnose osteoporosis. DXA reflects the bone mass density (BMD) of selected bones only (femur and spine) whereas the Ca isotope biomarker reflects bone Ca loss of the whole skeleton. In addition, the close correlation between Ca isotopes and biomarkers of bone demineralization suggest that early changes in bone demineralization are detected by Ca isotope values, long before radiological changes in BMD can manifest on DXA. Further studies are required to independently confirm that Ca isotope measurement provide a sensitive, non-invasive and radiation-free method for the diagnosis of osteoporosis.
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Affiliation(s)
- A Eisenhauer
- GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany.,OSTEOLABS GmbH, c/o GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany
| | - M Müller
- University Medical Center Schleswig-Holstein (UKSH), Arnold-Heller-Str. 3, 24105 Kiel, Germany.,OSTEOLABS GmbH, c/o GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany
| | - A Heuser
- GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany.,OSTEOLABS GmbH, c/o GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany
| | - A Kolevica
- GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany.,OSTEOLABS GmbH, c/o GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany
| | - C-C Glüer
- Sektion Biomedizinische Bildgebung, Klinik für Radiologie und Neuroradiologie, Am Botanischen Garten 14, 24118 Kiel, Germany
| | - M Both
- Klinik für Neuroradiologie und Radiologie, (UKSH), Arnold-Heller-Str. 3, 24105 Kiel, Germany
| | - C Laue
- Clinical Research Center Kiel GmbH, Schauenburgerstraße 116, 24118 Kiel, Germany
| | - U V Hehn
- Medistat, GmbH, Kieler Straße 15, 24119 Kronshagen, Germany
| | - S Kloth
- OSTEOLABS GmbH, c/o GEOMAR Helmholtz Centre for Ocean Research Kiel, 24148 Kiel, Wischhofstr.1-3, Germany
| | - R Shroff
- Great Ormond Street Hospital for Children NHS Foundation Trust, London WC1N 3JH, United Kingdom of Great Britain and Northern Ireland
| | - J Schrezenmeir
- Clinical Research Center Kiel GmbH, Schauenburgerstraße 116, 24118 Kiel, Germany
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13
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Bröker-Lai J, Kollewe A, Schindeldecker B, Pohle J, Nguyen Chi V, Mathar I, Guzman R, Schwarz Y, Lai A, Weißgerber P, Schwegler H, Dietrich A, Both M, Sprengel R, Draguhn A, Köhr G, Fakler B, Flockerzi V, Bruns D, Freichel M. Heteromeric channels formed by TRPC1, TRPC4 and TRPC5 define hippocampal synaptic transmission and working memory. EMBO J 2017; 36:2770-2789. [PMID: 28790178 DOI: 10.15252/embj.201696369] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [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: 12/22/2016] [Revised: 07/01/2017] [Accepted: 07/07/2017] [Indexed: 12/30/2022] Open
Abstract
Canonical transient receptor potential (TRPC) channels influence various neuronal functions. Using quantitative high-resolution mass spectrometry, we demonstrate that TRPC1, TRPC4, and TRPC5 assemble into heteromultimers with each other, but not with other TRP family members in the mouse brain and hippocampus. In hippocampal neurons from Trpc1/Trpc4/Trpc5-triple-knockout (Trpc1/4/5-/-) mice, lacking any TRPC1-, TRPC4-, or TRPC5-containing channels, action potential-triggered excitatory postsynaptic currents (EPSCs) were significantly reduced, whereas frequency, amplitude, and kinetics of quantal miniature EPSC signaling remained unchanged. Likewise, evoked postsynaptic responses in hippocampal slice recordings and transient potentiation after tetanic stimulation were decreased. In vivo, Trpc1/4/5-/- mice displayed impaired cross-frequency coupling in hippocampal networks and deficits in spatial working memory, while spatial reference memory was unaltered. Trpc1/4/5-/- animals also exhibited deficiencies in adapting to a new challenge in a relearning task. Our results indicate the contribution of heteromultimeric channels from TRPC1, TRPC4, and TRPC5 subunits to the regulation of mechanisms underlying spatial working memory and flexible relearning by facilitating proper synaptic transmission in hippocampal neurons.
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Affiliation(s)
- Jenny Bröker-Lai
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany
| | - Astrid Kollewe
- Institute of Physiology, University of Freiburg, Freiburg, Germany
| | - Barbara Schindeldecker
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
| | - Jörg Pohle
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany.,Physiology of Neural Networks, Psychiatry/Psychopharmacology, Central Institute of Mental Health, J5, Heidelberg University, Mannheim, Germany
| | - Vivan Nguyen Chi
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Ilka Mathar
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany
| | - Raul Guzman
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
| | - Yvonne Schwarz
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
| | - Alan Lai
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany
| | - Petra Weißgerber
- Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | | | - Alexander Dietrich
- Walther-Straub-Institute for Pharmacology and Toxicology, Ludwig-Maximilians-University München, München, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Rolf Sprengel
- Max Planck Research Group of the Max Planck Institute for Medical Research at the Institute for Anatomy and Cell Biology, Heidelberg University, Heidelberg, Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Georg Köhr
- Physiology of Neural Networks, Psychiatry/Psychopharmacology, Central Institute of Mental Health, J5, Heidelberg University, Mannheim, Germany
| | - Bernd Fakler
- Institute of Physiology, University of Freiburg, Freiburg, Germany.,BIOSS, Center for Biological Signaling Studies, University of Freiburg, Freiburg, Germany‡
| | - Veit Flockerzi
- Experimental and Clinical Pharmacology and Toxicology, Saarland University, Homburg, Germany
| | - Dieter Bruns
- Center for Integrative Physiology and Molecular Medicine, Saarland University, Homburg, Germany
| | - Marc Freichel
- Institute of Pharmacology, Heidelberg University, Heidelberg, Germany
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14
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Both M, Humbert J, Müller A, Duwendag D, Holl-Ulrich K, Heneweer C, Meyer P, Fritzer E, Oltmann Schröder J, Glüer C, Jansen O, Tiwari S. Kathepsine als Marker für die molekulare Fluoreszenzbildgebung der Riesenzellarteriitis. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600344] [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: 10/19/2022]
Affiliation(s)
- M Both
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - J Humbert
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - A Müller
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Rheumatologie, Lübeck
| | - D Duwendag
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Ophthalmologie, Kiel
| | - K Holl-Ulrich
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Institut für Pathologie, Lübeck
| | - C Heneweer
- Universitätsklinikum Köln, Institut für Diagnostische und Interventionelle Radiologie, Köln
| | - P Meyer
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - E Fritzer
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Institut für Medizinische Informatik und Statistik, Kiel
| | - J Oltmann Schröder
- Universitätsklinikum Schleswig Holstein, Campus Kiel, Klinik für Innere Medizin I, Kiel
| | - C Glüer
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - O Jansen
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - S Tiwari
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
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15
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Both M, Daum C, Holle J, Fritzer E, Jansen O, Henes F. Computertomografische Varianten der Lungenfibrose bei Patienten mit mikroskopischer Polyangiitis. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600439] [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: 10/19/2022]
Affiliation(s)
- M Both
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - C Daum
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - J Holle
- Rheumazentrum Schleswig-Holstein Mitte, Neumünster
| | - E Fritzer
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Insitut für Medizinische Informatik und Statisik, Kiel
| | - O Jansen
- Universitätsklinikum Schleswig-Holstein, Campus Kiel, Klinik für Radiologie und Neuroradiologie, Kiel
| | - F Henes
- Universitätsklinikum Hamburg Eppendorf, Klinik für Diagnostische und Interventionelle Radiologie, Hamburg
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16
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Maier P, Kaiser ME, Grinevich V, Draguhn A, Both M. Differential effects of oxytocin on mouse hippocampal oscillationsin vitro. Eur J Neurosci 2016; 44:2885-2898. [DOI: 10.1111/ejn.13412] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Revised: 09/09/2016] [Accepted: 09/20/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Pia Maier
- Institute of Physiology and Pathophysiology; University of Heidelberg; Im Neuenheimer Feld 326 69120 Heidelberg Germany
| | - Martin E. Kaiser
- Institute of Physiology and Pathophysiology; University of Heidelberg; Im Neuenheimer Feld 326 69120 Heidelberg Germany
| | - Valery Grinevich
- Schaller Research Group on Neuropeptides; German Cancer Research Center (DKFZ) and Network Cluster of Excellence; University of Heidelberg; Heidelberg Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology; University of Heidelberg; Im Neuenheimer Feld 326 69120 Heidelberg Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology; University of Heidelberg; Im Neuenheimer Feld 326 69120 Heidelberg Germany
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Roth FC, Beyer KM, Both M, Draguhn A, Egorov AV. Downstream effects of hippocampal sharp wave ripple oscillations on medial entorhinal cortex layer V neurons in vitro. Hippocampus 2016; 26:1493-1508. [DOI: 10.1002/hipo.22623] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2016] [Indexed: 12/27/2022]
Affiliation(s)
- Fabian C. Roth
- Institute of Physiology and Pathophysiology, Department of Neurophysiology, Heidelberg University; Heidelberg D-69120 Germany
| | - Katinka M. Beyer
- Institute of Physiology and Pathophysiology, Department of Neurophysiology, Heidelberg University; Heidelberg D-69120 Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, Department of Neurophysiology, Heidelberg University; Heidelberg D-69120 Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, Department of Neurophysiology, Heidelberg University; Heidelberg D-69120 Germany
| | - Alexei V. Egorov
- Institute of Physiology and Pathophysiology, Department of Neurophysiology, Heidelberg University; Heidelberg D-69120 Germany
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Heneweer C, Sieler J, Jansen O, Both M. Einfluss verschiedener Narkotika auf mittels Kontrastultraschall erhobene Perfusionsparameter. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581651] [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: 10/22/2022]
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Keller MK, Draguhn A, Both M, Reichinnek S. Activity-dependent plasticity of mouse hippocampal assemblies in vitro. Front Neural Circuits 2015; 9:21. [PMID: 26041998 PMCID: PMC4435105 DOI: 10.3389/fncir.2015.00021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [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: 02/15/2015] [Accepted: 04/27/2015] [Indexed: 11/13/2022] Open
Abstract
Memory formation is associated with the generation of transiently stable neuronal assemblies. In hippocampal networks, such groups of functionally coupled neurons express highly ordered spatiotemporal activity patterns which are coordinated by local network oscillations. One of these patterns, sharp wave-ripple complexes (SPW-R), repetitively activates previously established groups of memory-encoding neurons, thereby supporting memory consolidation. This function implies that repetition of specific SPW-R induces plastic changes which render the underlying neuronal assemblies more stable. We modeled this repetitive activation in an in vitro model of SPW-R in mouse hippocampal slices. Weak electrical stimulation upstream of the CA3-CA1 networks reliably induced SPW-R of stereotypic waveform, thus representing re-activation of similar neuronal activity patterns. Frequent repetition of these patterns (100 times) reduced the variance of both, evoked and spontaneous SPW-R waveforms, indicating stabilization of pre-existing assemblies. These effects were most pronounced in the CA1 subfield and depended on the timing of stimulation relative to spontaneous SPW-R. Additionally, plasticity of SPW-R was blocked by application of a NMDA receptor antagonist, suggesting a role for associative synaptic plasticity in this process. Thus, repetitive activation of specific patterns of SPW-R causes stabilization of memory-related networks.
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Affiliation(s)
- Martin K Keller
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany
| | - Susanne Reichinnek
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany ; Mediterranean Institute of Neurobiology (INMED), INSERM Marseille, France
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Meyer P, Bartels A, Heneweer C, Seeger M, Holl-Ulrich K, Duwendag D, Saeger M, Schröder J, Kopetsch C, Zimmermann P, Jansen O, Both M. Diagnostik der Riesenzellarteriitis: Untersuchungen der humanen Arteria temporalis im Hochfrequenzbereich mit einem Kleintier-Ultraschallgerät. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551009] [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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Heneweer C, v. Broich-Oppert J, Meyer P, Both M, Jansen O, Molinari F. Charakterisierung des Gefäßsystems im subkutanen Mausmodell mittels Skeletonization von kontrastverstärkten hochauflösenden 3D-Ultraschallbildern. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550851] [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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22
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Treumer F, Metzger LM, Both M, Rohnen M, Kandzia C, Wiltfang J, Roider J. [Orbital impalement by wooden foreign bodies - an interdisciplinary challenge]. Klin Monbl Augenheilkd 2015; 232:189-92. [PMID: 25700256 DOI: 10.1055/s-0034-1383386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- F Treumer
- Klinik für Ophthalmologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - L M Metzger
- Klinik für Ophthalmologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - M Both
- Klinik für Radiologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - M Rohnen
- Klinik für Mund-, Kiefer- und Gesichtschirurgie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - C Kandzia
- Klinik für Ophthalmologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - J Wiltfang
- Klinik für Mund-, Kiefer- und Gesichtschirurgie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
| | - J Roider
- Klinik für Ophthalmologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
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Petersen H, Gotz P, Both M, Hey M, Ambrosch P, Bremer J, Holle J, Moosig F, Laudien M. Manifestation of eosinophilic granulomatosis with polyangiitis in head and neck. Rhinology 2015. [DOI: 10.4193/rhin14.074] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Langer C, Both M, Harders H, Lutz M, Eden M, Kühl C, Sattler B, Jansen O, Schaefer P, Frey N. Late enhanced computed tomography in Hypertrophic Cardiomyopathy enables accurate left-ventricular volumetry. Eur Radiol 2014; 25:575-84. [PMID: 25316053 DOI: 10.1007/s00330-014-3434-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 08/22/2014] [Accepted: 09/04/2014] [Indexed: 01/19/2023]
Abstract
OBJECTIVES Late enhancement (LE) multi-slice computed tomography (leMDCT) was introduced for the visualization of (intra-) myocardial fibrosis in Hypertrophic Cardiomyopathy (HCM). LE is associated with adverse cardiac events. This analysis focuses on leMDCT derived LV muscle mass (LV-MM) which may be related to LE resulting in LE proportion for potential risk stratification in HCM. METHODS N=26 HCM-patients underwent leMDCT (64-slice-CT) and cardiovascular magnetic resonance (CMR). In leMDCT iodine contrast (Iopromid, 350 mg/mL; 150mL) was injected 7 minutes before imaging. Reconstructed short cardiac axis views served for planimetry. The study group was divided into three groups of varying LV-contrast. LeMDCT was correlated with CMR. RESULTS The mean age was 64.2 ± 14 years. The groups of varying contrast differed in weight and body mass index (p < 0.05). In the group with good LV-contrast assessment of LV-MM resulted in 147.4 ± 64.8 g in leMDCT vs. 147.1 ± 65.9 in CMR (p > 0.05). In the group with sufficient contrast LV-MM appeared with 172 ± 30.8 g in leMDCT vs. 165.9 ± 37.8 in CMR (p > 0.05). Overall intra-/inter-observer variability of semiautomatic assessment of LV-MM showed an accuracy of 0.9 ± 8.6 g and 0.8 ± 9.2 g in leMDCT. All leMDCT-measures correlated well with CMR (r > 0.9). CONCLUSIONS LeMDCT primarily performed for LE-visualization in HCM allows for accurate LV-volumetry including LV-MM in > 90% of the cases. KEY POINTS • LeMDCT of relatively low contrast allows for LV planimetry in HCM. • The correlation of leMDCT-based LV volumetry with gold-standard CMR was excellent (r > 0.9). • LeMDCT requires approximately 2.0mL/kgBW of dye to achieve acceptable contrast.
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Affiliation(s)
- Christoph Langer
- Department of Cardiology, Angiology and Critical Care Medicine, University Medical Center Schleswig-Holstein, Campus Kiel, Christian-Albrechts-Universität Kiel, Schittenhelmstr. 12, 24105, Kiel, Germany,
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Schönberger J, Draguhn A, Both M. Lamina-specific contribution of glutamatergic and GABAergic potentials to hippocampal sharp wave-ripple complexes. Front Neural Circuits 2014; 8:103. [PMID: 25202239 PMCID: PMC4142707 DOI: 10.3389/fncir.2014.00103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Accepted: 08/05/2014] [Indexed: 12/29/2022] Open
Abstract
The mammalian hippocampus expresses highly organized patterns of neuronal activity which form a neuronal correlate of spatial memories. These memory-encoding neuronal ensembles form on top of different network oscillations which entrain neurons in a state- and experience-dependent manner. The mechanisms underlying activation, timing and selection of participating neurons are incompletely understood. Here we studied the synaptic mechanisms underlying one prominent network pattern called sharp wave-ripple complexes (SPW-R) which are involved in memory consolidation during sleep. We recorded SPW-R with extracellular electrodes along the different layers of area CA1 in mouse hippocampal slices. Contribution of glutamatergic excitation and GABAergic inhibition, respectively, was probed by local application of receptor antagonists into s. radiatum, pyramidale and oriens. Laminar profiles of field potentials show that GABAergic potentials contribute substantially to sharp waves and superimposed ripple oscillations in s. pyramidale. Inhibitory inputs to s. pyramidale and s. oriens are crucial for action potential timing by ripple oscillations, as revealed by multiunit-recordings in the pyramidal cell layer. Glutamatergic afferents, on the other hand, contribute to sharp waves in s. radiatum where they also evoke a fast oscillation at ~200 Hz. Surprisingly, field ripples in s. radiatum are slightly slower than ripples in s. pyramidale, resulting in a systematic shift between dendritic and somatic oscillations. This complex interplay between dendritic excitation and perisomatic inhibition may be responsible for the precise timing of discharge probability during the time course of SPW-R. Together, our data illustrate a complementary role of spatially confined excitatory and inhibitory transmission during highly ordered network patterns in the hippocampus.
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Affiliation(s)
- Jan Schönberger
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology, University of Heidelberg Heidelberg, Germany
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Tesch K, Kopetsch C, Sauer F, Zeuner R, Mrowietz U, Oltmann Schröder J, Jansen O, Both M, Wulff A. ICG-based Optical Imaging Suggests Subclinical Involvement of Asymptomatic Joints in Psoriatic Arthritis but not in Arthrosis. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Kopetsch C, Tesch K, Sauer F, Zeuner R, Mrowietz U, Oltmann Schröder J, Jansen O, Wulff A, Both M. Differentiation between arthrosis (Art) and psoriatic arthritis (PA) using fluorescence optical imaging. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Both M. Wann muss man als Radiologe daran denken? ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372953] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Fischer V, Both M, Draguhn A, Egorov AV. Choline-mediated modulation of hippocampal sharp wave-ripple complexesin vitro. J Neurochem 2014; 129:792-805. [DOI: 10.1111/jnc.12693] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 02/14/2014] [Accepted: 02/18/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Viktoria Fischer
- Institute of Physiology and Pathophysiology; Heidelberg University; Heidelberg Germany
| | - Martin Both
- Institute of Physiology and Pathophysiology; Heidelberg University; Heidelberg Germany
| | - Andreas Draguhn
- Institute of Physiology and Pathophysiology; Heidelberg University; Heidelberg Germany
- Bernstein Center for Computational Neuroscience (BCCN) Heidelberg/Mannheim; Heidelberg Germany
| | - Alexei V. Egorov
- Institute of Physiology and Pathophysiology; Heidelberg University; Heidelberg Germany
- Bernstein Center for Computational Neuroscience (BCCN) Heidelberg/Mannheim; Heidelberg Germany
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Moritz J, Claviez A, Ahlgrim C, Both M. Extranodales T-Zell-Lymphom. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1352582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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31
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Holle J, Röhl C, Laudien M, Both M, Holl-Ulrich K, Gross W. THU0216 Subglottic stenosis and tracheobronchitis in granulomatosis with polyangiitis (GPA, wegener’s) are associated with a high burden of disease and damage. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.2181] [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: 11/04/2022]
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Holle J, Voigt C, Nölle B, Both M, Holl-Ulrich K, Laudien M, Gross W. OP0184 Retrospective monocentric cohort of orbital masses in granulomatosis with polyangiitis (GPA, wegener’s): rare disease manifestation with a refractory disease course. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.1867] [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: 11/04/2022]
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Veldhoen S, Klink T, Geiger J, Both M, Vaith P, Neß T, Markl M, Adam G, Bley TA. Mit der kontrastmittelgestützten MRT gelingt die valide Beurteilung des kraniellen Befallsmusters bei Patienten mit Riesenzellarteriitis. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Schinke S, Reinhold-Keller E, Both M, Nölle B, Laudien M, Gross W, Holle J. Long-term outcome of 123 microscopic polyangiitis patients in a monocentric German cohort. Presse Med 2013. [DOI: 10.1016/j.lpm.2013.02.191] [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: 11/24/2022] Open
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Viereckel T, Kostic M, Bähner F, Draguhn A, Both M. Effects of the GABA-uptake blocker NNC-711 on spontaneous sharp wave-ripple complexes in mouse hippocampal slices. Hippocampus 2013; 23:323-9. [PMID: 23460368 DOI: 10.1002/hipo.22104] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/27/2012] [Indexed: 11/11/2022]
Abstract
The precise temporal and spatial activity patterns of neurons in cortical networks are organized by different state-dependent types of network oscillations. GABAergic inhibition plays a key role in the underlying mechanisms of such oscillations and it has been suggested that the duration of widely distributed phasic inhibitory postsynaptic potentials (IPSPs) determines the frequency of the resulting network oscillation. Here, we test this hypothesis in an in vitro model of sharp wave-ripple (SPW-R) complexes, a particularly fast pattern of network oscillations at ∼200 Hz which is involved in memory consolidation. We recorded SPW-R in mouse hippocampal slices in the absence and presence of NCC-711, an inhibitor of GABA uptake. The resulting prolongation of IPSP resulted in reduced occurrence of SPW-R, whereas the superimposed fast oscillations as well as the precision of rhythmic cell synchronization remained stable. Application of Diazepam which is a positive modulator of the GABAA receptor led to consistent results. We conclude that phasic inhibition is a major regulator of network excitability in CA3 (where SPW-Rs are generated), but does not set the frequency of hippocampal ripples.
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Affiliation(s)
- Thomas Viereckel
- Institut für Physiologie und Pathophysiologie, Universität Heidelberg, Heidelberg, Germany
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Moosig F, Reinhold-Keller E, Holl-Ulrich K, Feller AC, Bley T, Holle JU, Zwerina J, Lamprecht P, Dalhoff K, Venhoff N, Thiel J, Peter HH, Laudien M, Quetz J, Ambrosch P, Both M, Heller M. [How I treat …]. Z Rheumatol 2012; 71:775-84. [PMID: 23138555 DOI: 10.1007/s00393-012-0988-6] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- F Moosig
- Klinikum Bad Bramstedt GmbH, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Bad Bramstedt, Deutschland.
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Schröder JO, Zeuner RA, Bewig B, Both M. [Pulmonary emergencies in connective tissues disorders and vasculitides]. Z Rheumatol 2012; 71:278-87. [PMID: 22699216 DOI: 10.1007/s00393-011-0916-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Pulmonary emergencies in rheumatic diseases are rare, potentially life-threatening conditions that occur either as a manifestation of the disease itself or as an adverse event of immunosuppressive treatment. Diffuse alveolar hemorrhage, tracheal stenosis, acute pneumonitis and drug-induced lung injury belong to this category. The management of these emergencies requires intensive cooperation between rheumatology and pulmonology. The latter contributes its experience in the care of related conditions, specific endoscopic techniques and local interventions as well as the indispensable and life-supporting forms of assisted ventilation. The present article summarizes the current knowledge on diagnostic and therapeutic procedures including the newly available B-cell directed treatments.
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Affiliation(s)
- J O Schröder
- Medizinische Klinik I, Sektion Rheumatologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Schittenhelmstr. 12, 24105, Kiel, Deutschland.
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Bley TA, Geiger J, Both M, Ness T, Veith P, Markl M, Adam G, Langer M, Schröder O, Nölle B, Klink T. Multizentrische, prospektive Kohortenstudie zur Diagnostischen Wertigkeit der hochauflösenden MRT bei Arteriitis temporalis (Horton). ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311232] [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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Reichinnek S, von Kameke A, Hagenston AM, Freitag E, Roth FC, Bading H, Hasan MT, Draguhn A, Both M. Reliable optical detection of coherent neuronal activity in fast oscillating networks in vitro. Neuroimage 2011; 60:139-52. [PMID: 22209812 DOI: 10.1016/j.neuroimage.2011.12.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2011] [Revised: 12/01/2011] [Accepted: 12/11/2011] [Indexed: 11/24/2022] Open
Abstract
Cognitive and behavioral functions depend on the activation of stable neuronal assemblies, i.e. distributed groups of co-active neurons within neuronal networks. It is therefore crucial to monitor distributed patterns of activity in real time with single-neuron resolution. Microelectrode recordings allow detection of coincidence between discharges of identified units at high temporal resolution, but are not able to reveal the full spatial pattern of activity in multi-cellular assemblies. Therefore, observation of such distributed sets of neurons is a stronghold of optical techniques, but the required resolution, sensitivity, and speed are still challenging current technology. Here, we report a new approach for monitoring neuronal assemblies, using memory-related network oscillations in rodent hippocampal circuits as a model. The cytosolic calcium-sensitive fluorescent protein GCaMP3.NES was expressed using recombinant adeno-associated viral (rAAV)-mediated gene transfer in CA3 pyramidal neurons of cultured mouse hippocampal slices. After 14-21 days in culture, field potential recordings revealed spontaneous occurrence of sharp wave-ripple network events during which a fraction of local neurons is coherently activated. Using a custom-built epi-fluorescence microscope we could monitor a field of view of 410 μm × 410 μm with single-neuron optical resolution (20× objective, 0.4 NA). We developed a highly sensitive and specific wavelet-based method of cell identification allowing simultaneous observation of more than 150 neurons at frame rates of up to 60 Hz. Our recording configuration and image analysis provide a tool to investigate cognition-related activity patterns in the hippocampus and other circuits.
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Affiliation(s)
- Susanne Reichinnek
- Universität Heidelberg, Institut für Physiologie und Pathophysiologie, Germany
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40
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Henes FO, Chen Y, Bley TA, Fabel M, Both M, Herrmann K, Csernok E, Gross WL, Moosig F. Correlation of serum level of high mobility group box 1 with the burden of granulomatous inflammation in granulomatosis with polyangiitis (Wegener's). Ann Rheum Dis 2011; 70:1926-9. [PMID: 21765168 DOI: 10.1136/ard.2010.146456] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVES To investigate the correlation of serum levels of high mobility group box 1 (HMGB1) with the extent of granulomatous inflammation in granulomatosis with polyangiitis (GPA). METHODS From 169 patients with GPA, 17 patients with granulomatous inflammation, without evidence of vasculitis were identified and 36 patients without measurable 'granuloma' formation. HMGB1 serum levels were determined and compared between the two groups, using a Mann-Whitney U test. Serum levels of 26 healthy individuals served as controls. In a further 21 patients with GPA with a pulmonary granulomatous manifestation from the study population, CT volumetry of 'granuloma' was performed. Volumes were compared with serum levels of HMGB1 (Spearman rank order test). RESULTS Serum levels of HMGB1 were significantly higher in patients with predominant granulomatous disease than in patients without measurable 'granuloma' manifestations (6.44 ± 4.53 ng/ml vs 3.85 ± 2.88 ng/ml; p=0.0107). In both groups, levels of HMGB1 were significantly higher than in controls (2.34 ± 2.01 ng/ml; p<0.01). A positive correlation of HMGB1 serum levels with volumes of pulmonary 'granuloma' (r=0.761, p<0.0017) was seen. CONCLUSIONS HMGB1 serum levels are significantly higher in GPA with predominant granulomatous manifestations and correlate with volumes of pulmonary 'granuloma'. HMGB1 may be used as a marker of the burden of granulomatous inflammation in GPA.
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Affiliation(s)
- F O Henes
- Department of Diagnostic and Interventional Radiology, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany.
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Both M, Schulte K, Moosig F, Fritzer E, Gross WL, Heller M, Biederer J. High white blood cell count in patients with giant cell arteritis predicts an increased risk of stenosis in upper extremity arteries: Figure 1. Ann Rheum Dis 2011; 70:1879-80. [DOI: 10.1136/ard.2010.146910] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Schniewind B, Schafmayer C, Both M, Arlt A, Fritscher-Ravens A, Hampe J. Ingrowth and device disintegration in an intralobar abscess cavity during endosponge therapy for esophageal anastomotic leakage. Endoscopy 2011; 43 Suppl 2 UCTN:E64-5. [PMID: 21341185 DOI: 10.1055/s-0030-1255799] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- B Schniewind
- General Surgery and Thoracic Surgery, University Hospital Schleswig-Holstein, Kiel, Germany.
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43
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Both M, Gribl B, Seeger M, Heller M, Biederer J. Tiefe Beinvenenthrombosen in der MR-Angiographie mit Gadofosveset. ROFO-FORTSCHR RONTG 2011. [DOI: 10.1055/s-0031-1279316] [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: 10/18/2022]
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Affiliation(s)
- Andreas Draguhn
- Institute of Physiology and Pathophysiology, University of Heidelberg, Heidelberg, Germany.
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Hampe J, Schniewind B, Both M, Fritscher-Ravens A. Use of a NOTES closure device for full-thickness suturing of a postoperative anastomotic esophageal leakage. Endoscopy 2010; 42:595-8. [PMID: 20593338 DOI: 10.1055/s-0030-1255518] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Leakages at surgical anastomoses in the gastrointestinal tract represent a challenging clinical problem. Standard therapy entails conservative or surgical revision of the anastomotic area with high morbidity and mortality up to 30 %. None of the previous endoscopic approaches, which include stenting, endoscopic clip closure, and fibrin glue injection, are sufficiently established for routine clinical use. We report a case of a 68-year-old woman with a postoperative leakage and abscess at the esophagojejunostomy. The defect was closed with two anchor-lock sutures. The patient was able to resume oral food intake 5 days later and made a full recovery with endoscopically documented mucosal healing at the site of the anastomosis. In summary, endoscopic suturing may be a promising approach for the treatment of postoperative leaks that warrants further, controlled investigation.
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Affiliation(s)
- J Hampe
- Department of Internal Medicine I, University Hospital Schleswig-Holstein, Kiel, Germany
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Zlomuzica A, Reichinnek S, Maxeiner S, Both M, May E, Wörsdörfer P, Draguhn A, Willecke K, Dere E. Deletion of connexin45 in mouse neurons disrupts one-trial object recognition and alters kainate-induced gamma-oscillations in the hippocampus. Physiol Behav 2010; 101:245-53. [PMID: 20471991 DOI: 10.1016/j.physbeh.2010.05.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2009] [Revised: 04/16/2010] [Accepted: 05/07/2010] [Indexed: 10/19/2022]
Abstract
Neuronal gap junctions, allowing fast intercellular electrotonic signal transfer, have been implicated in mechanisms governing learning and memory processes. We have examined conditional neuron-directed (Cx45fl/fl:Nestin-Cre) connexin45 deficient mice in terms of behavioral and electrophysiological correlates of learning and memory. Behavioral habituation to a novel environment and motor learning were not changed in these mice. Novel object recognition after delays of up to 60min was impaired in neuronal Cx45 deficient mice. However, object-place recognition was not significantly different from controls. Analysis of enhanced green fluorescent reporter protein expression controlled by the endogenous mouse Cx45 promoter in the brain of neuronal Cx45 deficient mice suggested that Cx45 is expressed in the perirhinal cortex and the CA3 subregion of the hippocampus. The neuronal Cx45 deficient mice were also examined for aberrations in the generation and synchronization of network oscillations in the hippocampus. General excitability, synaptic short time plasticity, and spontaneous high-frequency oscillations (sharp-wave ripples) in the hippocampus were not different from controls. However, bath stimulation of hippocampal slices with kainate induced significantly lower gamma-oscillation amplitudes in the CA3, but not in the CA1 subfield of the neuronal Cx45 deficient mice. Additionally, they exhibited a significantly larger full width half maximum of the frequency distribution in the CA1 subfield as compared to the controls. In conclusion, the neuron-directed deletion of Cx45 impaired one-trial novel object recognition and altered kainate-induced gamma-oscillations possibly via the disruption of inter-neuronal gap junctional communication in the hippocampus or perirhinal cortex.
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Affiliation(s)
- A Zlomuzica
- Institute of Experimental Psychology, Heinrich-Heine-University Düsseldorf, Universitätsstr. 1, D-40225 Düsseldorf, Germany
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Friedrich O, Both M, Weber C, Schürmann S, Teichmann MDH, von Wegner F, Fink RHA, Vogel M, Chamberlain JS, Garbe C. Microarchitecture is severely compromised but motor protein function is preserved in dystrophic mdx skeletal muscle. Biophys J 2010; 98:606-16. [PMID: 20159157 DOI: 10.1016/j.bpj.2009.11.005] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Revised: 10/27/2009] [Accepted: 11/05/2009] [Indexed: 10/19/2022] Open
Abstract
Progressive force loss in Duchenne muscular dystrophy is characterized by degeneration/regeneration cycles and fibrosis. Disease progression may involve structural remodeling of muscle tissue. An effect on molecular motorprotein function may also be possible. We used second harmonic generation imaging to reveal vastly altered subcellular sarcomere microarchitecture in intact single dystrophic mdx muscle cells (approximately 1 year old). Myofibril tilting, twisting, and local axis deviations explain at least up to 20% of force drop during unsynchronized contractile activation as judged from cosine angle sums of myofibril orientations within mdx fibers. In contrast, in vitro motility assays showed unaltered sliding velocities of single mdx fiber myosin extracts. Closer quantification of the microarchitecture revealed that dystrophic fibers had significantly more Y-shaped sarcomere irregularities ("verniers") than wild-type fibers (approximately 130/1000 microm(3) vs. approximately 36/1000 microm(3)). In transgenic mini-dystrophin-expressing fibers, ultrastructure was restored (approximately 38/1000 microm(3) counts). We suggest that in aged dystrophic toe muscle, progressive force loss is reflected by a vastly deranged micromorphology that prevents a coordinated and aligned contraction. Second harmonic generation imaging may soon be available in routine clinical diagnostics, and in this work we provide valuable imaging tools to track and quantify ultrastructural worsening in Duchenne muscular dystrophy, and to judge the beneficial effects of possible drug or gene therapies.
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Affiliation(s)
- O Friedrich
- Medical Biophysics, Institute of Physiology and Pathophysiology, Ruprecht Karls University, Heidelberg, Germany.
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Both M, Schulte K, Moosig F, Fritzer E, Gross WL, Heller M, Biederer J. Thorakale Aortenaneurysmata und arterielle Stenosen der oberen Extremitäten bei Patienten mit Riesenzellarteriitis: MRA- Befunde im Zusammenhang mit serologischen Parametern. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Biederer J, Bolte H, Schmidt T, Charalambous N, Both M, Kopp U, Hoffmann B, Freitag-Wolf S, Van Metter R, Heller M. Detection of artificial air space opacities with digital radiography: ex vivo study on enhanced latitude post-processing. ROFO-FORTSCHR RONTG 2010; 182:235-42. [PMID: 20099215 DOI: 10.1055/s-0028-1109961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE To evaluate in a.-p. digital chest radiograms of an ex vivo system if increased latitude and enhanced image detail contrast (EVP) improve the accuracy of detecting artificial air space opacities in parts of the lung that are superimposed by the diaphragm. MATERIALS AND METHODS 19 porcine lungs were inflated inside a chest phantom, prepared with 20-50 ml gelatin-stabilized liquid to generate alveolar air space opacities, and examined with direct radiography (3.0 × 2.5 k detector/ 125 kVp/ 4 mAs). 276 a.-p. images with and without EVP of 1.0-3.0 were presented to 6 observers. 8 regions were read for opacities, the reference was defined by CT. Statistics included sensitivity/specificity, interobserver variability, and calculation of Az (area under ROC curve). RESULTS Behind the diaphragm (opacities in 32/92 regions), the median sensitivity increased from 0.35 without EVP to 0.53-0.56 at EVP 1.5-3.0 (significant in 5/6 observers). The specificity decreased from 0.96 to 0.90 (significant in 6/6), and the Az value and interobserver correlation increased from 0.66 to 0.74 and 0.39 to 0.48, respectively. Above the diaphragm, the median sensitivity for artificial opacities (136/276 regions) increased from 0.71 to 0.77-0.82 with EVP (significant in 4/6 observers). The specificity and Az value decreased from 0.76 to 0.62 and 0.74 to 0.70, respectively, (significant in 3/6). CONCLUSION In this ex vivo experiment, EVP improved the diagnostic accuracy for artificial air space opacities in the superimposed parts of the lung (area under the ROC curve). Above the diaphragm, the accuracy was not affected due to a tradeoff in sensitivity/specificity.
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Affiliation(s)
- J Biederer
- Klinik für Diagnostische Radiologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel
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Both M, Nölle B, von Forstner C, Moosig F, Gross WL, Heller M. [Imaging techniques in the evaluation of primary large vessel vasculitides: Part 2: duplex ultrasound, positron emission tomography, computed tomography, and ophthalmological methods]. Z Rheumatol 2009; 68:819-33. [PMID: 19937036 DOI: 10.1007/s00393-009-0565-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
This article focuses on the clinical application and technical aspects of imaging methods which are used alternatively or additionally to angiography or magnetic resonance imaging in patients with Takayasu's arteritis or giant cell arteritis. Providing a high spatial resolution, duplex ultrasound is particularly suitable for the evaluation of peripheral arteries. With the exception of cranial arteries, positron emission tomography as a whole body examination is the best imaging modality for the assessment of inflammatory activity. Computed tomography is used for angiographic examinations and enables evaluation of wall thickening in large arteries. It is the method of choice in the case of emergencies due to aortic aneurysm or dissection. In addition to angiographic and ultrasound techniques, ophthalmological methods comprise biomicroscopy, including funduscopy and optical coherence tomography.
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Affiliation(s)
- M Both
- Klinik für Diagnostische Radiologie, Universitätsklinikum Schleswig-Holstein, Campus Kiel, Arnold-Heller-Str. 9, 24105, Kiel, Deutschland.
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