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Hammon K, Renner K, Althammer M, Voll F, Babl N, Decking SM, Siska PJ, Matos C, Conejo ZEC, Mendes K, Einwag F, Siegmund H, Iberl S, Berger RS, Dettmer K, Schoenmehl R, Brochhausen C, Herr W, Oefner PJ, Rehli M, Thomas S, Kreutz M. D-2-hydroxyglutarate supports a tolerogenic phenotype with lowered major histocompatibility class II expression in non-malignant dendritic cells and acute myeloid leukemia cells. Haematologica 2024. [PMID: 38235501 DOI: 10.3324/haematol.2023.283597] [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] [Received: 05/25/2023] [Indexed: 01/19/2024] Open
Abstract
D-2-hydroxyglutarate (D-2-HG) accumulates in primary acute myeloid leukemia (AML) patients with mutated isocitrate dehydrogenase (IDH) and other malignancies. D-2-HG suppresses antitumor T cell immunity but little is known about potential effects on non-malignant myeloid cells. Here we show that D-2-HG impairs human but not murine dendritic cell (DC) differentiation, resulting in a tolerogenic phenotype with low major histocompatibility (MHC) class II expression. In line, IDH-mutated AML blasts exhibited lower expression of HLA-DP and were less susceptible to lysis by HLA-DP-specific T cells. Interestingly, D-2-HG reprogrammed metabolism towards increased lactate production in DCs and AML besides its expected impact on DNA demethylation. Vitamin C accelerated DNA demethylation, but only the combination of vitamin C and glycolytic inhibition lowered lactate levels and supported MHC class II expression. Our results indicate an unexpected link between the immunosuppressive metabolites 2-HG and lactic acid and suggest a potentially novel therapeutic strategy with combinations of anti-glycolytic drugs and epigenetic modulators (hypomethylating agents) or other therapeutics for the treatment of AML.
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Affiliation(s)
- Kathrin Hammon
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; LIT - Leibniz Institute for Immunotherapy; Regensburg
| | - Kathrin Renner
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; LIT - Leibniz Institute for Immunotherapy; Regensburg, Germany; Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg
| | - Michael Althammer
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | - Florian Voll
- LIT - Leibniz Institute for Immunotherapy; Regensburg
| | - Nathalie Babl
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | - Sonja-Maria Decking
- Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg
| | - Peter J Siska
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | - Carina Matos
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | | | - Karina Mendes
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; Present address: Universidade Católica Portuguesa, Center for Interdisciplinary Research in Health (CIIS), Institute of Health Sciences (ICS); Viseu
| | - Friederike Einwag
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | - Heiko Siegmund
- Institute of Pathology, University of Regensburg; Regensburg
| | - Sabine Iberl
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | - Raffaela S Berger
- Institute of Functional Genomics, University of Regensburg; Regensburg
| | - Katja Dettmer
- Institute of Functional Genomics, University of Regensburg; Regensburg
| | - Rebecca Schoenmehl
- Institute of Pathology, University Medical Center Mannheim, University Heidelberg, Mannheim
| | - Christoph Brochhausen
- Institute of Pathology, University of Regensburg; Regensburg, Germany; Institute of Pathology, University Medical Center Mannheim, University Heidelberg, Mannheim
| | - Wolfgang Herr
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg
| | - Peter J Oefner
- Institute of Functional Genomics, University of Regensburg; Regensburg
| | - Michael Rehli
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; LIT - Leibniz Institute for Immunotherapy; Regensburg
| | - Simone Thomas
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; LIT - Leibniz Institute for Immunotherapy; Regensburg
| | - Marina Kreutz
- Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; LIT - Leibniz Institute for Immunotherapy; Regensburg.
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2
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Siska PJ, Decking SM, Babl N, Matos C, Bruss C, Singer K, Klitzke J, Schön M, Simeth J, Köstler J, Siegmund H, Ugele I, Paulus M, Dietl A, Kolodova K, Steines L, Freitag K, Peuker A, Schönhammer G, Raithel J, Graf B, Geismann F, Lubnow M, Mack M, Hau P, Bohr C, Burkhardt R, Gessner A, Salzberger B, Wagner R, Hanses F, Hitzenbichler F, Heudobler D, Lüke F, Pukrop T, Herr W, Wolff D, Spang R, Poeck H, Hoffmann P, Jantsch J, Brochhausen C, Lunz D, Rehli M, Kreutz M, Renner K. Metabolic imbalance of T cells in COVID-19 is hallmarked by basigin and mitigated by dexamethasone. J Clin Invest 2021; 131:148225. [PMID: 34779418 DOI: 10.1172/jci148225] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 09/28/2021] [Indexed: 12/15/2022] Open
Abstract
Metabolic pathways regulate immune responses and disrupted metabolism leads to immune dysfunction and disease. Coronavirus disease 2019 (COVID-19) is driven by imbalanced immune responses, yet the role of immunometabolism in COVID-19 pathogenesis remains unclear. By investigating 87 patients with confirmed SARS-CoV-2 infection, 6 critically ill non-COVID-19 patients, and 47 uninfected controls, we found an immunometabolic dysregulation in patients with progressed COVID-19. Specifically, T cells, monocytes, and granulocytes exhibited increased mitochondrial mass, yet only T cells accumulated intracellular reactive oxygen species (ROS), were metabolically quiescent, and showed a disrupted mitochondrial architecture. During recovery, T cell ROS decreased to match the uninfected controls. Transcriptionally, T cells from severe/critical COVID-19 patients showed an induction of ROS-responsive genes as well as genes related to mitochondrial function and the basigin network. Basigin (CD147) ligands cyclophilin A and the SARS-CoV-2 spike protein triggered ROS production in T cells in vitro. In line with this, only PCR-positive patients showed increased ROS levels. Dexamethasone treatment resulted in a downregulation of ROS in vitro and T cells from dexamethasone-treated patients exhibited low ROS and basigin levels. This was reflected by changes in the transcriptional landscape. Our findings provide evidence of an immunometabolic dysregulation in COVID-19 that can be mitigated by dexamethasone treatment.
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Affiliation(s)
- Peter J Siska
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Sonja-Maria Decking
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | - Nathalie Babl
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Carina Matos
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Christina Bruss
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Katrin Singer
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg
| | - Jana Klitzke
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Marian Schön
- Department of Statistical Bioinformatics, Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Jakob Simeth
- Department of Statistical Bioinformatics, Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Josef Köstler
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Heiko Siegmund
- Institute of Pathology, University of Regensburg, Regensburg, Germany.,Central Biobank Regensburg, University Hospital and University of Regensburg, Regensburg, Germany
| | - Ines Ugele
- Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg
| | | | | | - Kristina Kolodova
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | | | - Katharina Freitag
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Alice Peuker
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Gabriele Schönhammer
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Johanna Raithel
- Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | | | | | | | | | - Peter Hau
- Wilhelm Sander-NeuroOncology Unit and Department of Neurology
| | - Christopher Bohr
- Department of Otorhinolaryngology, University Hospital Regensburg, Regensburg
| | | | - Andre Gessner
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | | | - Ralf Wagner
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Frank Hanses
- Department of Infection Prevention and Infectious Diseases, and.,Emergency Department, University Hospital Regensburg, Regensburg, Germany
| | | | - Daniel Heudobler
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Bavarian Cancer Research Center, Regensburg, Germany
| | - Florian Lüke
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Tobias Pukrop
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Bavarian Cancer Research Center, Regensburg, Germany
| | - Wolfgang Herr
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Daniel Wolff
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | - Rainer Spang
- Department of Statistical Bioinformatics, Institute of Functional Genomics, University of Regensburg, Regensburg, Germany
| | - Hendrik Poeck
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany
| | - Petra Hoffmann
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | - Jonathan Jantsch
- Institute of Clinical Microbiology and Hygiene, University Hospital Regensburg, Regensburg, Germany
| | - Christoph Brochhausen
- Institute of Pathology, University of Regensburg, Regensburg, Germany.,Central Biobank Regensburg, University Hospital and University of Regensburg, Regensburg, Germany
| | | | - Michael Rehli
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | - Marina Kreutz
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
| | - Kathrin Renner
- Department of Internal Medicine III, University Hospital Regensburg, Regensburg, Germany.,Regensburg Center for Interventional Immunology, University of Regensburg, Regensburg, Germany
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Brochhausen C, Froschermeier F, Alt V, Pfeifer C, Mayr A, Weiss I, Babel M, Siegmund H, Kerschbaum M. New quantitative automated model to simulate bacterial dissemination in human tissue during irrigation of contaminated wounds. Eur Cell Mater 2021; 42:63-71. [PMID: 34342876 DOI: 10.22203/ecm.v042a05] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
This study presents a simple and cost-effective model using microparticles to simulate the bacterial distribution pattern in soft tissue after low- and high-pressure irrigation. Silica coated iron microparticles [comparable diameter (1 µm) and weight (0.8333 pg) to Staphylococcus aureus] were applied to the surface of twenty fresh human muscle tissue samples in two amputated lower legs. Particle dissemination into deep tissue layers as an undesired side effect was investigated in four measuring fields as positive control (PC) as well as after performing pulsatile high-pressure (HP, 8 measuring fields) and low-pressure flushing (LP, 8 measuring fields). Five biopsies were taken out of each measuring field to get a total number of 100 biopsies. After histological and digital image processing, the specimens were analysed, and all incomplete sections were excluded. A special detection algorithm was parameterised using the open source bioimage analysis software QuPath. The application of this detection algorithm enabled automated counting and detection of the particles with a sensitivity of 95 % compared to manual counts. Statistical analysis revealed significant differences (p < 0.05) in our three different sample groups: HP (M = 1608, S = 302), LP (M = 2176, SD = 609) and PC (M = 4011, SD = 686). While both HP and LP flushing techniques are able to reduce the number of bacteria, a higher effectiveness is shown for HP irrigation. Nevertheless, a challenge for the validity of the study is the use of dead tissue and therefore a possible negative influence of high-pressure irrigation on tissue healing and further dispersion of particles cannot be evaluated.
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Affiliation(s)
| | | | | | | | | | | | | | | | - M Kerschbaum
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss Allee 11, 93053 Regensburg,
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Muehler D, Rupp CM, Keceli S, Brochhausen C, Siegmund H, Maisch T, Hiller KA, Buchalla W, Cieplik F. Insights Into Mechanisms of Antimicrobial Photodynamic Action Toward Biofilms Using Phenalen-1-One Derivatives as Photosensitizers. Front Microbiol 2020; 11:589364. [PMID: 33193252 PMCID: PMC7662152 DOI: 10.3389/fmicb.2020.589364] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 09/28/2020] [Indexed: 12/21/2022] Open
Abstract
Introduction In view of increasing resistance against antibiotics and antiseptics, antimicrobial photodynamic therapy (aPDT) may be a promising approach for use in dentistry. The aim of this study was to investigate the mechanism of action of aPDT with the phenalene-1-one derivatives SAPYR and SA-PN-05 as photosensitizers by evaluating bacterial ability to replicate, membrane integrity, metabolic activity, and formation of reactive oxygen species (ROS) in biofilms of Actinomyces naeslundii, Streptococcus mutans, and Escherichia coli. Materials and Methods Single-species biofilms (A. naeslundii, S. mutans, and E. coli) were cultured under aerobic conditions for 48 h followed by treatment with the photosensitizers SAPYR and SA-PN-05 at various concentrations (0, 50, 100, 500 μM) and different incubation periods of 5, 10, 20, and 30 min and subsequent irradiation for 10 min (Waldmann PIB 3000; λem = 360–600 nm; 50 mW/cm2; 30 J/cm2). Control samples were treated with dH2O and kept in dark for the same periods. Bacterial ability to replicate was evaluated by colony forming unit (CFU) assay. The cytoplasmic membrane integrity was investigated by flow cytometry using SYBR Green and propidium iodide and visualized by scanning and transmission electron microscopy. For SAPYR, metabolic activity and formation of intracellular ROS after irradiation were evaluated via luminescence and fluorometric assays, respectively. Results SAPYR showed antimicrobial effects (>3 log10 CFU reduction) on S. mutans after 5 min and on A. naeslundii after 20 min incubation and light activation. For E. coli, CFU reduction was >2 log10 after 30 min of incubation. SA-PN-05 showed an antimicrobial effect after 5 min for all bacteria. Membrane damage upon aPDT with SAPYR was observed for E. coli, but not for S. mutans and A. naeslundii. Following treatment with SA-PN-05, irradiated samples and dark controls of all three species showed loss of membrane integrity. Luminescence and fluorometric assays showed a reduction in metabolic activity and an increase in formation of intracellular ROS in all three species upon aPDT treatment with SAPYR. Conclusion The observed loss in ability to replicate upon aPDT with SAPYR in single-species biofilms may be due to an increase in formation of intracellular ROS upon photodynamic treatment.
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Affiliation(s)
- Denise Muehler
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Christina M Rupp
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Sercan Keceli
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | | | - Heiko Siegmund
- Institute of Pathology, University Hospital Regensburg, Regensburg, Germany
| | - Tim Maisch
- Department of Dermatology, University Hospital Regensburg, Regensburg, Germany
| | - Karl-Anton Hiller
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Wolfgang Buchalla
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
| | - Fabian Cieplik
- Department of Conservative Dentistry and Periodontology, University Hospital Regensburg, Regensburg, Germany
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Schroeder JA, Semmelmann M, Siegmund H, Grafe C, Evert M, Palm C. Improved interactive computer-assisted approach for evaluation of ultrastructural cilia abnormalities. Ultrastruct Pathol 2017. [DOI: 10.1080/01913123.2016.1270978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Josef A. Schroeder
- Central EM-Lab, Pathology Department, University Medical Hospital, Regensburg, Germany
| | - Matthias Semmelmann
- Regensburg Medical Image Computing (ReMIC), OTH Regensburg, Regensburg, Germany
| | - Heiko Siegmund
- Central EM-Lab, Pathology Department, University Medical Hospital, Regensburg, Germany
| | - Claudia Grafe
- Central EM-Lab, Pathology Department, University Medical Hospital, Regensburg, Germany
| | - Matthias Evert
- Central EM-Lab, Pathology Department, University Medical Hospital, Regensburg, Germany
| | - Christoph Palm
- Regensburg Medical Image Computing (ReMIC), OTH Regensburg, Regensburg, Germany
- Regensburg Center of Biomed, Engineering, OTH Regensburg and University Regensburg, Regensburg, Germany
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Schucht K, Schröder J, Siegmund H, Grafe C, Schreml S. Nodular Cutaneous Amyloidosis at the Temple. Case Rep Dermatol 2016; 8:193-6. [PMID: 27504090 PMCID: PMC4965534 DOI: 10.1159/000447234] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 05/25/2016] [Accepted: 05/27/2016] [Indexed: 11/19/2022] Open
Abstract
A 52-year-old woman presented with a large partially yellow and erythematous tumor on her right temple. She reported that it had grown over the last 4 years. Regional lymph nodes were impalpable. A punch biopsy showed eosinophilic material in the dermis and subcutis. Immunohistochemistry showed positive staining for kappa and lambda light chains. Electron microscopy showed the typical amyloid fibrils (7–10 nm in diameter). There was no evidence of systemic amyloidosis, paraproteinemia or underlying plasmacytoma. The tumor was completely removed via curettage. At follow-up, the patient presented in good health with no signs of relapse.
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Affiliation(s)
- Kathrin Schucht
- Department of Dermatology, University Medical Center Regensburg, Regensburg, Germany
| | - Josef Schröder
- Institute of Pathology, University of Regensburg, Regensburg, Germany
| | - Heiko Siegmund
- Institute of Pathology, University of Regensburg, Regensburg, Germany
| | - Claudia Grafe
- Institute of Pathology, University of Regensburg, Regensburg, Germany
| | - Stephan Schreml
- Department of Dermatology, University Medical Center Regensburg, Regensburg, Germany
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7
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Wáng YXJ, Schroeder J, Siegmund H, Idée JM, Fretellier N, Jestin-Mayer G, Factor C, Deng M, Kang W, Morcos SK. Total gadolinium tissue deposition and skin structural findings following the administration of structurally different gadolinium chelates in healthy and ovariectomized female rats. Quant Imaging Med Surg 2015; 5:534-45. [PMID: 26435917 DOI: 10.3978/j.issn.2223-4292.2015.05.03] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To assess the retention of gadolinium (Gd) in skin, liver, and bone following gadodiamide or gadoteric acid administration. METHODS Gd was measured in skin, liver and femur bone in female rats 10 weeks after administration of 17.5 mmol Gd/kg over 5 days of Gd agents. Rat skin microscopy, energy filtering transmission electron microscopy and elemental analysis were performed, and repeated after receiving the same dosage of gadodiamide in rats with osteoporosis induced with bilateral ovariectomy (OVX). The OVX was performed 60 days after the last injection of gadodiamide and animals sacrificed 3 weeks later. RESULTS Gd concentration was 180-fold higher in the skin, 25-fold higher in the femur, and 30-fold higher in the liver in rats received gadodiamide than rats received gadoteric acid. The retention of Gd in the skin with gadodiamide was associated with an increase in dermal cellularity, and Gd encrustation of collagen fibers and deposition inside the fibroblasts and other cells. No differences in Gd concentration in liver, skin, and femur were observed between rats receiving gadodiamide with or without OVX. CONCLUSIONS Gd tissue retention with gadodiamide was higher than gadoteric acid. Tissues Gd deposition did not alter following gadodiamide administration to ovariectomized rats.
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Affiliation(s)
- Yì-Xiáng J Wáng
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Joseph Schroeder
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Heiko Siegmund
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Jean-Marc Idée
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Nathalie Fretellier
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Gaëlle Jestin-Mayer
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Cecile Factor
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Min Deng
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Wei Kang
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
| | - Sameh K Morcos
- 1 Department of Imaging and Interventional Radiology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 2 Central EM Laboratory, Institute of Pathology, Uniklinikum Regensburg, The University of Regensburg, Germany ; 3 Guerbet, Research and Innovation Division, BP 57400, 95943 Roissy-Charles de Gaulle cedex, France ; 4 Department of Anatomical and Cellular Pathology, Faculty of Medicine, The Chinese University of Hong Kong, Prince of Wales Hospital, New Territories, Hong Kong SAR, China ; 5 Department of Diagnostic Imaging, The University of Sheffield, Sheffield, UK
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8
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Schreml S, Schroeder J, Siegmund H, Eder F, Babilas P, Landthaler M, Karrer S. Plasmocytoma-induced intertriginous amyloid purpura. Ann Dermatol 2013; 25:391-2. [PMID: 24003294 PMCID: PMC3756216 DOI: 10.5021/ad.2013.25.3.391] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Revised: 10/09/2012] [Accepted: 11/12/2012] [Indexed: 11/24/2022] Open
Affiliation(s)
- Stephan Schreml
- Department of Dermatology, University Medical Center Regensburg, Regensburg, Germany
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Schreml S, Weber BH, Schröder J, Siegmund H, Schaller J, Vogt T, Landthaler M, Schönbuchner I, Röcken C, Babilas P. Familial primary localized cutaneous amyloidosis with an oncostatin M receptor-β mutation, Pro694Leu. Clin Exp Dermatol 2013; 38:932-5. [DOI: 10.1111/ced.12160] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/07/2013] [Indexed: 11/27/2022]
Affiliation(s)
- S. Schreml
- Department of Dermatology; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
| | - B. H. Weber
- Institute of Human Genetics; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
| | - J. Schröder
- Institute of Pathology; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
| | - H. Siegmund
- Institute of Pathology; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
| | - J. Schaller
- Laboratory for Dermatohistology; Duisburg Germany
| | - T. Vogt
- Department of Dermatology; Saarland University Hospital; Homburg/Saar Germany
| | - M. Landthaler
- Department of Dermatology; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
| | - I. Schönbuchner
- Institute of Human Genetics; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
| | - C. Röcken
- Institute of Pathology; University Medical Center Kiel; Kiel Germany
| | - P. Babilas
- Department of Dermatology; University Medical Center Regensburg; Franz-Josef-Strauss-Allee 11 93053 Regensburg Germany
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Siegmund H. Die Rolle des aktiven Mesenchyms für die Heilung von Infektionen (insbesondere bei der Goldbehandlung der Tuberkulose). Dtsch Med Wochenschr 2009. [DOI: 10.1055/s-0028-1121983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wabbels B, Schroeder JA, Voll B, Siegmund H, Lorenz B. Electron microscopic findings in levator muscle biopsies of patients with isolated congenital or acquired ptosis. Graefes Arch Clin Exp Ophthalmol 2007; 245:1533-41. [PMID: 17522883 DOI: 10.1007/s00417-007-0603-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2006] [Revised: 04/15/2007] [Accepted: 04/24/2007] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE Systemic mitochondriopathies as chronic progressive external ophthalmoplegia (CPEO) are frequently associated with ptosis. We investigated whether mitochondrial abnormalities in the levator muscle are also found in patients with isolated congenital or acquired ptosis showing no other signs of mitochondrial cytopathy. METHODS Biopsies of levator muscle were taken during surgery from 24 patients with isolated congenital (group 1) or early-onset acquired ptosis (group 2). All patients were given a thorough clinical examination before and after surgery. Ultrathin muscle sections were examined by transmission electron microscopy. The findings were compared with biopsies from five patients with CPEO (positive control) and two patients with traumatic ptosis or pseudoptosis (negative control). RESULTS The mean levator function equalled 7.3 mm (range 4-10 mm) in group 1 and 12.8 mm (range 9-15 mm) in group 2. Eight out of 11 patients in group 1 and eight out of 13 patients in group 2 were found to have mitochondrial alterations such as megamitochondria, mitochondrial matrix alterations and abnormal cristae, similar to CPEO. Within group 1 and 2, no significant clinical differences were found between patients with and without mitochondrial abnormalities. CONCLUSION Mitochondrial alterations were found in a surprisingly large proportion of levator biopsies from patients with isolated congenital or early-onset acquired ptosis. There was no statistically significant correlation between mitochondrial alterations and levator function. Our findings suggest that the ultrastructural assessment of mitochondria in the eyelid muscle is a valuable tool, and may guide further biochemical and mutation screening tests that will help to understand the etiopathology of this disease.
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Affiliation(s)
- Bettina Wabbels
- Department of Pediatric Ophthalmology, Strabismology and Ophthalmogenetics, University of Regensburg, Franz Josef Strauss Allee 11, 93042 Regensburg, Germany
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Holtkamp M, Buchheim K, Siegmund H, Meierkord H. Optical imaging reveals reduced seizure spread and propagation velocities in aged rat brain in vitro. Neurobiol Aging 2003; 24:345-53. [PMID: 12498969 DOI: 10.1016/s0197-4580(02)00100-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Old age is the most common time for patients to develop epileptic seizures, and due to their frequent unusual clinical presentation the diagnosis of epilepsy is often delayed in the elderly. It is as yet unknown if pronounced alterations in the plastic properties of aging nervous tissue contribute to these phenomena. We employed a non-lesional in vitro epilepsy model to study seizure susceptibility, spread pattern, and propagation velocities in combined hippocampal-entorhinal cortex slices of aged rats and controls using electrophysiological methods and imaging of intrinsic optical signals. In aged animals we saw a less extensive spread of seizure-like events into areas adjacent to the region of onset of activity and a decreased spread velocity in various anatomical regions. In addition, both the activity-dependent shrinkage of the extracellular space (ECS)-volume and the extracellular K(+) concentration were significantly reduced compared to controls. The results of this study are consistent with the clinical observation that epileptic seizures in the elderly have a reduced tendency to spread. In addition, our data suggest that in the absence of structural lesions seizure susceptibility in the aging brain is not increased.
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Affiliation(s)
- M Holtkamp
- Neurologische Klinik, Universitätsklinikum Charité, Schumannstr. 20/21, 10117 Berlin, Germany.
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Albrecht D, Blühdorn R, Siegmund H, Berger H, Calo' G. Inhibitory action of nociceptin/orphanin FQ on functionally different thalamic neurons in urethane-anaesthetized rats. Br J Pharmacol 2001; 134:333-42. [PMID: 11564651 PMCID: PMC1572959 DOI: 10.1038/sj.bjp.0704264] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2001] [Accepted: 06/28/2001] [Indexed: 12/14/2022] Open
Abstract
1. In this study we administered nociceptin/orphanin FQ (NC) ionotophoretically onto neurons located in functionally distinct thalamic structures of urethane-anesthetized rats. Extracellular single unit recordings were made in the medial and lateral ventroposterior nucleus, posterior thalamic nucleus, zona incerta, lateral posterior nucleus, laterodorsal nucleus, ventrolateral nucleus and reticular nucleus. 2. NC decreased the firing rate in 60% of thalamic neurons. This decrease in firing rate was accompanied by a significant reduction in the number of high threshold bursts. 3. In about 20% of the neurons NC increased the firing rate. In most cells NC-induced increases in discharge rate could be blocked by the GABA(A) receptor antagonists bicuculline and SR 95531. 4. The NC receptor ligands [Phe(1)Psi(CH(2)-NH)Gly(2)] nociceptin(1-13)NH(2), Ac-RYYRIK-NH(2) and [Nphe(1)]NC(1-13)NH(2) were also evaluated. All these peptides inhibited NC-induced changes in firing rate. In addition, in some neurons where NC inhibited firing, [Nphe(1)]NC(1-13)NH(2) and Ac-RYYRIK-NH(2) elicited per se an increase in firing rate, suggesting the existence of tonic innervation of thalamic neurons by NC-containing fibres. 5. In NC-inhibited neurons nocistatin induced a significant increase in firing rate. 6. The present study demonstrated that NC regulates various thalamic nuclei related not only to somatosensory, but also to the visual and motor functions.
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Affiliation(s)
- D Albrecht
- Johannes-Müller-Institute of Physiology (Charité), Humboldt University Berlin, Germany.
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Weissinger F, Buchheim K, Siegmund H, Heinemann U, Meierkord H. Optical imaging reveals characteristic seizure onsets, spread patterns, and propagation velocities in hippocampal-entorhinal cortex slices of juvenile rats. Neurobiol Dis 2000; 7:286-98. [PMID: 10964601 DOI: 10.1006/nbdi.2000.0298] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
We have combined recordings with extracellular microelectrodes or ion-sensitive electrodes and imaging of intrinsic optical signal changes to study the spatiotemporal pattern of seizure onset and spread during development. We have employed the entorhinal cortex-hippocampus brain slice preparation of juvenile rats at different stages of postnatal maturation. Three age groups were analyzed: 4-6 days (age group I), 10-14 days (age group II), and 20-23 days (age group III). Seizure-like events were induced by perfusion of slices with Mg(2+)-free artificial cerebrospinal fluid thereby removing the Mg(2+) block of the N-methyl-d-aspartate receptor. Seizure susceptibility was highest in age groups II and III. In age group I seizure-like events originated mainly in the hippocampus proper. Seizure-like events in age group II originated mainly in the entorhinal cortex and this tendency was even more pronounced in age group III. Invasion of the hippocampal formation via the perforant path-dentate gyrus and via the subiculum was seen in age groups I and II. In contrast, in age group III the hippocampus was invaded exclusively via the subiculum pathway. The velocity of spread at which seizure-like events propagated within different regions of the slice increased with postnatal age. The characteristics of onset, spread patterns, and propagation velocities as revealed by this study allow insight into the evolving properties of the developing brain.
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Affiliation(s)
- F Weissinger
- Neurologische Klinik und Poliklinik, Universitätsklinikum Charité, Medizinische Fakultät der Humboldt-Universität zu Berlin, Schumannstrasse 20/21, Berlin, 10117, Germany
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Buchheim K, Schuchmann S, Siegmund H, Weissinger F, Heinemann U, Meierkord H. Comparison of intrinsic optical signals associated with low Mg2+-and 4-aminopyridine-induced seizure-like events reveals characteristic features in adult rat limbic system. Epilepsia 2000; 41:635-41. [PMID: 10840393 DOI: 10.1111/j.1528-1157.2000.tb00222.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE To analyze the intrinsic optical signal change associated with seizure-like events in two frequently used in vitro models-the low-Mg2+ and the 4-aminopyridine (4-AP) models-and to monitor regions of onset and spread patterns of these discharges by using imaging of intrinsic optical signals (IOS). METHODS Combined hippocampal-entorhinal-cortex slices of adult rats were exposed to two different treatments: lowering extracellular Mg2+ concentrations or application of 100 microM 4-AP. The electrographic features of the discharges were monitored using extracellular microelectrodes. Optical imaging was achieved by infrared transillumination of the slice and analysis of changes in light transmission using a subtraction approach. The electrographic features were compared with the optical changes. Regions of onset and spread patterns were analyzed in relevant anatomic regions of the slice. RESULTS Both lowering extracellular Mg2+ concentrations and application of 4-AP induced seizure-like events. The relative duration of the intrinsic optical signal change associated with seizure-like events in the low-Mg2+ model was significantly longer compared with that seen with those occurring in the 4-AP model, although duration of field potentials did not differ significantly in the two models. Seizure-like events of the low-Mg2+ model originated predominantly in the entorhinal cortex, with subsequent propagation toward the subiculum and neocortical structures. In contrast, no consistent region of onset or spread patterns were seen in the 4-AP model, indicating that the seizure initiation is not confined to a particular region in this model. CONCLUSIONS We conclude that different forms of spontaneous epileptiform activity are associated with characteristic optical signal changes and that optical imaging represents an excellent method to assess regions of seizure onset and spread patterns.
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Affiliation(s)
- K Buchheim
- Neurologische Klinik und Poliklinik and *Institut für Physiologie, Universitätsklinikum Charité, Medizinische Fakultät der Humboldt-Universität zu Berlin, Berlin, Germany.
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Buchheim K, Schuchmann S, Siegmund H, Gabriel HJ, Heinemann U, Meierkord H. Intrinsic optical signal measurements reveal characteristic features during different forms of spontaneous neuronal hyperactivity associated with ECS shrinkage in vitro. Eur J Neurosci 1999; 11:1877-82. [PMID: 10336655 DOI: 10.1046/j.1460-9568.1999.00606.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
We induced three different forms of spontaneous synchronous hyperactivity in adult rat hippocampal-entorhinal cortex slices in order to investigate effects on the intrinsic optical signal and associated changes in the extracellular space (ECS) volume. Low-Mg2+ artificial cerebrospinal fluid (ACSF) and the addition of 4-aminopyridine induced synchronous hyperactivity resulting mainly from increased synaptic transmission, while low-Ca2+ ACSF induced hyperactivity in the absence of evoked synaptic transmission. In the two models of enhanced synaptic transmission, spontaneous activity lead to an immediate increase of light transmission. In contrast, a decrease of light transmission took place during low-Ca2+-induced hyperactivity. All three forms of synchronous neuronal hyperactivity were associated with a shrinkage of the ECS volume, as revealed by the tetraethylammonium signal, measured with ion-sensitive microelectrodes. This indicates that the change in the intrinsic optical signal is not simply related to a shrinkage in ECS volume. We conclude that different forms of spontaneous synchronous neuronal hyperactivity are associated with characteristic optical signals and that the direction of the change in intrinsic optical signal does not reflect ECS shrinkage alone.
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Affiliation(s)
- K Buchheim
- Neurologische Klinik und Poliklinik, Universitätsklinikum Charité, Medizinische Fakultät der Humboldt-Universität zu Berlin, Germany.
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Printz H, Siegmund H, Wojte C, Schäfer C, Hesse H, Rothmund M, Göke B. "Human pancreas-specific protein" (procarboxypeptidase B): a valuable marker in pancreatitis? Pancreas 1995; 10:222-30. [PMID: 7624299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Human pancreas-specific protein (PASP) has been characterized previously as a serum marker for pancreatitis. It was then identified as pancreatic procarboxypeptidase B (PCB). The aim of the present study was to verify the usefulness of PASP (PCB) as a serum marker in patients with acute (n = 20) and chronic (n = 12) pancreatitis and in those following endoscopic retrograde cholangiopancreaticography (ERCP) (n = 44). Serum PASP values were analyzed by radioimmunoassay, with a range of normal values between 15 and 111 ng/ml. Between April 1992 and September 1992, 20 subjects (19-86 years of age) with acute pancreatitis (alcoholic, 8; biliary, 8; other, 4) were studied. We found edematous pancreatitis in 17 cases and severe hemorrhagic pancreatitis in three cases. At admission, peak levels of PASP (average value, 1,976 +/- 329 ng/ml), pancreatic isoamylase (942 +/- 151 U/L) and lipase (2,946 +/- 534 U/L) were detected in 15 of 20, 16 of 20, and 12 of 20 cases, respectively. The etiology of the pancreatitis had no influence on the PASP values. Furthermore, 10 patients with alcoholic and two patients with nonalcoholic chronic pancreatitis (29-67 years of age) were studied. The average peak level of PASP was 1,229 +/- 434 ng/ml. In this group, PASP paralleled the time course of amylase and lipase. Maximal PASP, amylase, and lipase levels were found in 11 of 12, nine of 12, and five of 12 patients, respectively, on the day of admission. ERCP was performed in 44 patients (36-87 years of age), demonstrating common bile duct stones in 16 and bile or pancreatic ductal tumors in 15 cases.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- H Printz
- Department of Surgery, Philipps-University of Marburg, Germany
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Abstract
In 33 male and female adult volunteers, eye position recordings were performed by means of an infrared reflection technique. Slides of randomly shuffled black-and-white photographs (7.5 x 10 degrees) of faces and vases were projected for 6 or 20 sec respectively in a visual memory task. In each series, 10 slides of art nouveau vases and of the "inner part" of masked Caucasian faces were used. During recording the head was fixed by a bite-board. (a) For faces the preferred targets of the centre of gaze were the eyes, the mouth and nose region, for vases the contours and some prominent ornaments. (b) Left-right asymmetries in the gaze-movement sampling strategy appeared with faces, but not with vases. In faces, the overall time that the centre of gaze remained in the left half of the field of gaze was significantly longer than in the right half. (c) When, however, the amplitude of the gaze excursions into the left and right halves of the inspected items was taken as a measure and normalized, a preference for the right gaze field was observed. (d) The relative left-right bias during face inspection was stronger with the 6 sec than with the 20 sec inspection period and significantly stronger in female than in male subjects for the 6 sec tasks. (e) Left/right inversion of the face stimuli did not abolish the side bias. Thus the asymmetric sampling strategy when faces were inspected as compared to vases was due to "internal" factors on the part of the subjects. It is hypothesized that a left-right asymmetry in hemispheric visual data processing for face stimuli was the cause of a left-right asymmetry in gaze motor strategies when faces were inspected.
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Affiliation(s)
- I Mertens
- Institute of Physiology, Humboldt Universität, Berlin, Germany
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Abstract
The spontaneous muscular activity of the masseter and two non-masticatory muscles, and their activity under conditions of noise and flickering light, were recorded in 30 patients with mandibular dysfunction, and in 25 control subjects. The mood of the subjects during the investigation, and the possible presence of emotional disturbances was evaluated by means of questionnaires. The enhanced muscular activity of the masseter muscle differentiated patients from the control group, although it does not constitute a pathognomic sign. Unilaterality of complaints, and dysfunctions of differing intensity were not reflected in differential EMG findings. One-fifth of the patients exhibited neck muscle activity occurring simultaneously with the masseter activity. The effect of the applied stimuli on the muscular activity was not homogeneous, leading to activation in some cases and inhibition in others. Symptoms of anxiety could be observed in seven TMJ patients. Anxious patients showed higher levels of muscular activity and emotional irritability during the experiment than non-anxious patients.
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Affiliation(s)
- H Schroeder
- Institut für Physiologie des Bereichs Medizin (Charité), Humboldt-Universität, Berlin, Germany
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Schroeder H, Siegmund H, Santibanez-H. G, Kluge A. Temporomandibular pain and dysfunction — An electromyographic study. Int J Psychophysiol 1991. [DOI: 10.1016/0167-8760(91)90313-m] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Schroeder H, Siegmund H, Kluge A. [The temporomandibular joint-pain-dysfunction syndrome--an experimental study]. Z Arztl Fortbild (Jena) 1991; 85:61-2. [PMID: 2028658] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- H Schroeder
- Institut für Physiologie und Poliklinik für Chirurgische Stomatologie Bereiches Medizin (Charité), Humboldt-Universität zu Berlin
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Siegmund H, Stoppa M, Santibáñez G. Eye and head movements to visual and auditory targets. Act Nerv Super (Praha) 1987; 29:73-82. [PMID: 3661101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Coordinated eye-head movements evoked by the presentation of visual, auditory and combined audio-visual targets were studied in 24 human subjects. At 60 deg located targets latencies of eye and head movements were shorter for auditory than for visual stimuli. Latencies were shorter for bisensory than for monosensory targets. The eye and head latencies were differently influenced by the modality of the stimulus when the eccentricity of the target was changed, but not by the variation of the stimulus duration. The different responses of the eye and the head depending on target modality and target eccentricity can be partially attributed to perceptual and central processing mechanisms, and are important to answer the question about the initial event in coordinated eye-head orientation.
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Affiliation(s)
- H Siegmund
- Institute of Physiology, Humboldt University, Berlin
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Hähnel H, Weber M, Siegmund H. [Experiences in conservative scoliosis therapy with the Berlin modification of the Boston brace]. Beitr Orthop Traumatol 1984; 31:27-35. [PMID: 6712579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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27
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Siegmund H, Bächmann K. [The application of numerical toxonomy for the classification of wines (author's transl)]. Z Lebensm Unters Forsch 1978; 166:298-303. [PMID: 685479 DOI: 10.1007/bf01127657] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Monovariate and multivariate methods for clustering of wines according to origin, grape variety and vintage year (representing) climate are compared. The multivariate method which is described makes it possible to find similarities especially related to origin and is superior to a monovariate analysis.
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Siegmund H, Bächmann K. [The assignment of wines to location by determination of trace element patterns (author's transl)]. Z Lebensm Unters Forsch 1977; 164:1-7. [PMID: 878637 DOI: 10.1007/bf01135413] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The concentrations of trace elements were determined in 70 wines by activation analysis and investigated as a function of location, grape variety and vintage year. It is possible using numerical taxonomy to cluster all the wines of one region by their greater similarity in trace element patterns. It is too early for a definative evaluation of the limits of this method.
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Schilling F, Siegmund H. [Intrahepatic cholestasis following treatment with penicillamine D and indomethacine]. Med Welt 1976; 27:1111. [PMID: 1084454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Siegmund H. [Intrahepatic cholestasis following treatment with D-penicillamine and indomethacin]. Med Welt 1976; 27:172-3. [PMID: 1250131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Siegmund H, Dennig H. [Case of acute poliomyelitis disseminated lupus erythematosus]. Ther Ggw 1972; 111:506-8 passim. [PMID: 5029714] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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Siegmund H. [Pancytopenia following viral hepatitis]. Med Klin 1969; 64:1073-5. [PMID: 5808896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Siegmund H. Die Cytodiagnostik der b�sartigen Geschw�lste. J Cancer Res Clin Oncol 1953. [DOI: 10.1007/bf00524647] [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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Siegmund H. Naturwissenschaftliches Denken in der modernen Pathologie. I. Teil 1. Dtsch Med Wochenschr 1950. [DOI: 10.1055/s-0028-1117780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rein H, Siegmund H, Löhe H. Schäden durch Einwirkungen von Kälte. Arch Dermatol Res 1943. [DOI: 10.1007/bf01841989] [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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Pflug, Riehm, Büttner, Siegmund H. Sonstige Fernwirkungen. J Cancer Res Clin Oncol 1942. [DOI: 10.1007/bf01625260] [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: 12/01/2022]
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Tscherne, Hirsch-Hoffmann, Franken, Liedmann, Breipohl W, Rübsamen R, Hansen, Alexia M, Stübler, Siegmund H. Weibliches Genitale. J Cancer Res Clin Oncol 1942. [DOI: 10.1007/bf01629961] [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: 11/29/2022]
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39
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Romberg, Siegmund H, Koch R, Neureiter, Schrader, Wolfram, Kiessig, Olsen A, Munck W, Hüssy, Otto R, Liedmann, Manz, Heidler H, Kernbach, Koch E, Förster. Schwangerschaft. Fehlgeburt. Geburt. Kindesmord. Int J Legal Med 1942. [DOI: 10.1007/bf01754310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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40
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Mühlbock, Strobel, Werner P, Winkler H, Frommolt, Strakosch, Heemeyer R, Fuchs H, Hüssy, Fritz-Hölder H, Reisner, Volk, Mauer, Buschbeck, Pallos, Siegmund H, Zietzschmann, Kiefer KH, Kraul, Heidler, Hummel R, Ostertag, Olsen A, Dietel H, Ufer. Weibliches Genitale. J Cancer Res Clin Oncol 1941. [DOI: 10.1007/bf01881325] [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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41
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Rintelen K, Krücke C, Merten, Voss, Krauspe, Dörbeck F, Mühlbock, Kraul L, Siegmund H, Pichler S. Histologie. J Cancer Res Clin Oncol 1941. [DOI: 10.1007/bf01881302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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42
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Druckrey, Nothdurft, Albers, Pflug, Oesterlin, Schulten, Orzechowski, Siegmund H, Hüssy, Hoder F, Nothdurft. Biochemie, Stoffwechsel. J Cancer Res Clin Oncol 1941. [DOI: 10.1007/bf01621347] [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: 11/29/2022]
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43
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Orzechowski, Siegmund H, Nothdurft, Haagen. Hormone, Vitamine. J Cancer Res Clin Oncol 1940. [DOI: 10.1007/bf01641782] [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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44
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Siegmund H, Meixner, Abegg, Estler, Frommolt, Vaubel, Ulrich H, Tietze, Rübsamen W, Kernbach, Romanese, Herold L, Neureiter, Burchardt HH, Liguori-Hohenauer, Többen H, Ganter, Baeyer, Dubitscher. Strittige geschlechtliche Verhältnisse. Sexualpathologie. Sexualdelikte. Int J Legal Med 1939. [DOI: 10.1007/bf01760362] [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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45
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46
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Siegmund H, Collier, Druckrey, Siebke H, Neumann HO, Hüssy, Werthemann, Fetscher, Orzechowski. Hormone. J Cancer Res Clin Oncol 1936. [DOI: 10.1007/bf01620867] [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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47
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Lamers, Kaufmann C, Saenger, Büttner, Strassmann G, Dittrich, Waldeyer, Rossenbeck, v. Knorre, Schultz W, Rieper, Derichsweiler, Baniecki, Siegmund H, Dietel, Schwarz H, Schönberg, Frommolt. Gerichtliche Geburtshilfe. Int J Legal Med 1935. [DOI: 10.1007/bf01753291] [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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48
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49
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50
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