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Greite R, Schott S, Wang L, Gohlke L, Kreimann K, Derlin K, Gutberlet M, Schmidbauer M, Leffler A, Tudorache I, Salman J, Ius F, Natanov R, Fegbeutel C, Haverich A, Lichtinghagen R, Hüsing AM, von Vietinghoff S, Schmitt R, Shushakova N, Rong S, Haller H, Schmidt‐Ott KM, Gram M, Vijayan V, Scheffner I, Gwinner W, Immenschuh S. Free heme and hemopexin in acute kidney injury after cardiopulmonary bypass and transient renal ischemia. Clin Transl Sci 2023; 16:2729-2743. [PMID: 37899696 PMCID: PMC10719480 DOI: 10.1111/cts.13667] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/13/2023] [Accepted: 10/09/2023] [Indexed: 10/31/2023] Open
Abstract
Free heme is released from hemoproteins during hemolysis or ischemia reperfusion injury and can be pro-inflammatory. Most studies on nephrotoxicity of hemolysis-derived proteins focus on free hemoglobin (fHb) with heme as a prosthetic group. Measurement of heme in its free, non-protein bound, form is challenging and not commonly used in clinical routine diagnostics. In contrast to fHb, the role of free heme in acute kidney injury (AKI) after cardiopulmonary bypass (CPB) surgery is unknown. Using an apo-horseradish peroxidase-based assay, we identified free heme during CPB surgery as predictor of AKI in patients undergoing cardiac valve replacement (n = 37). Free heme levels during CPB surgery correlated with depletion of hemopexin (Hx), a heme scavenger-protein. In mice, the impact of high levels of circulating free heme on the development of AKI following transient renal ischemia and the therapeutic potential of Hx were investigated. C57BL/6 mice were subjected to bilateral renal ischemia/reperfusion injury for 15 min which did not cause AKI. However, additional administration of free heme in this model promoted overt AKI with reduced renal function, increased renal inflammation, and reduced renal perfusion on functional magnetic resonance imaging. Hx treatment attenuated AKI. Free heme administration to sham operated control mice did not cause AKI. In conclusion, free heme is a predictor of AKI in CPB surgery patients and promotes AKI in transient renal ischemia. Depletion of Hx in CPB surgery patients and attenuation of AKI by Hx in the in vivo model encourage further research on Hx therapy in patients with increased free heme levels during CPB surgery.
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Affiliation(s)
- Robert Greite
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Sebastian Schott
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Li Wang
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Lukas Gohlke
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Kirill Kreimann
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Katja Derlin
- Institute for Diagnostic and Interventional RadiologyHannover Medical SchoolHannoverGermany
| | - Marcel Gutberlet
- Institute for Diagnostic and Interventional RadiologyHannover Medical SchoolHannoverGermany
| | - Martina Schmidbauer
- Institute for Diagnostic and Interventional RadiologyHannover Medical SchoolHannoverGermany
| | - Andreas Leffler
- Department of Anesthesiology and Intensive Care MedicineHannover Medical SchoolHannoverGermany
| | - Igor Tudorache
- Department of Cardiac SurgeryUniversity Hospital DusseldorfDusseldorfGermany
| | - Jawad Salman
- Department of Cardiothoracic, Transplantation and Vascular SurgeryHannover Medical SchoolHannoverGermany
| | - Fabio Ius
- Department of Cardiothoracic, Transplantation and Vascular SurgeryHannover Medical SchoolHannoverGermany
| | - Ruslan Natanov
- Department of Cardiothoracic, Transplantation and Vascular SurgeryHannover Medical SchoolHannoverGermany
| | - Christine Fegbeutel
- Department of Cardiothoracic, Transplantation and Vascular SurgeryHannover Medical SchoolHannoverGermany
| | - Axel Haverich
- Department of Cardiothoracic, Transplantation and Vascular SurgeryHannover Medical SchoolHannoverGermany
| | | | - Anne M. Hüsing
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Sibylle von Vietinghoff
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
- Nephrology Section, Medical Clinic 1University Hospital BonnBonnGermany
| | - Roland Schmitt
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Nelli Shushakova
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Song Rong
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Hermann Haller
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Kai M. Schmidt‐Ott
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Magnus Gram
- Pediatrics, Department of Clinical Sciences LundSkane University Hospital, Lund UniversityLundSweden
| | - Vijith Vijayan
- Institute for Transfusion Medicine and Transplant EngineeringHannover Medical SchoolHannoverGermany
- Division of Critical Care Medicine, Department of PediatricsStanford University School of MedicineStanfordCaliforniaUSA
| | - Irina Scheffner
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Wilfried Gwinner
- Department of Nephrology and HypertensionHannover Medical SchoolHannoverGermany
| | - Stephan Immenschuh
- Institute for Transfusion Medicine and Transplant EngineeringHannover Medical SchoolHannoverGermany
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2
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Schmidbauer M, Busjahn A, Paprottka P, Bücker A, Nadjiri J, Wacker FK. Impact of the COVID-19 Pandemic on Interventional Radiology in Germany. ROFO-FORTSCHR RONTG 2023; 195:597-604. [PMID: 36863364 DOI: 10.1055/a-2018-3512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
PURPOSE To investigate the effect of the ongoing COVID-19 pandemic on interventional radiology (IR) in Germany in 2020 and 2021. MATERIALS UND METHODS This retrospective study is based on the nationwide interventional radiology procedures documented in the quality register of the German Society for Interventional Radiology and Minimally Invasive Therapy (DeGIR-QS-Register). The nationwide volume of interventions in the pandemic years 2020 and 2021 was compared with the pre-pandemic period (Poisson-test, Mann-Whitney test). The aggregated data were additionally evaluated by intervention type with differentiated consideration of the temporal epidemiological infection occurrence. RESULTS During the two pandemic years 2020 and 2021, the number of interventional procedures increased by appr. 4 % compared to the same period of the previous year (n = 190 454 and 189 447 vs. n = 183 123, respectively, p < 0.001). Only the first pandemic wave in spring 2020 (weeks 12-16) showed a significant temporary drop in the number of interventional procedures by 26 % (n = 4799, p < 0.05). This primarily involved interventions that were not immediately medically urgent, such as pain treatments or elective arterial revascularization. In contrast, interventions in the field of interventional oncology, such as port catheter implantations and local tumor ablations, remained unaffected. The decline of the first wave of infection was accompanied by a rapid recovery and a significant, partly compensatory, 14 % increase in procedure numbers in the second half of 2020 compared to the same period of the previous year (n = 77 151 vs. 67 852, p < 0.001). Subsequent pandemic waves had no effect on intervention numbers. CONCLUSION The COVID-19 pandemic in Germany led to a significant short-term decrease in interventional radiology procedures in the initial phase. A compensatory increase in the number of procedures was observed in the subsequent period. This reflects the adaptability and robustness of IR and the high demand for minimally invasive radiological procedures in medical care. KEY POINTS · The study shows the nationwide pandemic-related effects on interventional radiology in Germany.. · In quantitative terms, the ongoing pandemic caused a significant, temporary decline in intervention cases only in the initial phase.. · Subsequent waves of infections had no effect on the scope of services provided by interventional radiology.. · Short-term deficits, especially in elective interventions, could be partially compensated.. CITATION FORMAT · Schmidbauer M, Busjahn A, Paprottka P et al. Impact of the COVID-19 Pandemic on Interventional Radiology in Germany. Fortschr Röntgenstr 2023; 195: 597 - 604.
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Affiliation(s)
- Martina Schmidbauer
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | | | - Philipp Paprottka
- Department of Interventional Radiology, Klinikum rechts der Isar of the Technical University of Munich, Germany
| | - Arno Bücker
- Clinic of Diagnostic and Interventional Radiology, Saarland University Medical Center, Homburg, Germany
| | - Jonathan Nadjiri
- Department of Interventional Radiology, Klinikum rechts der Isar of the Technical University of Munich, Germany
| | - Frank K Wacker
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
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3
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Schmidbauer M, Grenacher L, Juchems MS, Memmel E, Lauenstein T, Schreyer AG, Verloh N, Becker C, Vogl TJ, Wessling J, Wacker FK, Ringe KI. Impact of the COVID 19 Pandemic on Radiological Imaging in Germany. ROFO-FORTSCHR RONTG 2021; 194:625-633. [PMID: 34963189 DOI: 10.1055/a-1710-3767] [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: 10/19/2022]
Abstract
PURPOSE To analyze the impact of the COVID-19 pandemic in 2020 on the radiological imaging volume in Germany. MATERIALS UND METHODS In this retrospective multicenter study, we analyzed CT and MRI examinations of 7 radiology institutes across Germany from January to December 2020. The imaging volume was compared to 2019 (Wilcoxon-Mann-Whitney test). Modality, patient service locations, and examined body parts were assessed in consideration of time periods of the pandemic. In addition, correlation with the incidence of SARS-CoV-2 cases and associated death was performed (Spearman-test). RESULTS In total, in 2020, imaging volume declined by 4 % (n = 8314) compared with 2019 (p < 0.05). The hard lockdown during the first pandemic wave (calendar week 12-16, March 22 - April 19) revealed the highest decrease with 29 % (n = 894, p < 0.01), with the greatest decrease in CT (36 % vs. MRI 26 %), outpatients (38 %, p < 0.01), and imaging of the spine and extremities (51-72 %, < 0.05 - p < 0.01). Examinations referred from the emergency department (-13 %, p < 0.05) and CT of the chest (-16 %, p < 0.05) were least affected. With the end of the first wave, gradual normalization of the imaging volume was observed and persisted until the end of the observation period. A reduction of imaging volume negatively correlated with the incidence of SARS-CoV-2-positive cases and associated deaths (r = 0.28 and 0.49, p < 0.05 and p < 0.001). CONCLUSION The COVID-19 pandemic was associated with a significant temporary decline in imaging volume. After the first lockdown period, a quick recovery was observed with radiologic imaging examinations steadily approaching prior-year figures. KEY POINTS · This study assesses the impact of dynamic pandemic activity on radiological imaging in a multicenter analysis in Germany.. · The COVID-19 pandemic was associated with a temporary decline in CT and MRI scans.. · Relaxation of restrictions was associated with fast normalization of imaging volumes to prior-year levels, which persisted until the end of the year.. · Significant catch-up effects were not observed.. CITATION FORMAT · Schmidbauer M, Grenacher L, Juchems MS et al. Impact of the COVID 19 Pandemic on Radiological Imaging in Germany. Fortschr Röntgenstr 2021; DOI: 10.1055/a-1710-3767.
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Affiliation(s)
- Martina Schmidbauer
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Lars Grenacher
- Imaging and Prevention Center, Conradia Radiology Munich, Germany
| | - Markus S Juchems
- Diagnostic and Interventional Radiology, Klinikum Konstanz, Germany
| | - Erik Memmel
- Diagnostic and Interventional Radiology, Klinikum Konstanz, Germany
| | - Thomas Lauenstein
- Department of Radiology, Evangelisches Krankenhaus Düsseldorf, Dusseldorf, Germany
| | - Andreas G Schreyer
- Institute for Diagnostic and Interventional Radiology, Brandenburg Medical School Theodor Fontane, Brandenburg a.d. Havel, Germany
| | - Niklas Verloh
- Department of Radiology, University Hospital Regensburg, Germany
| | - Claus Becker
- Department of Radiology, University Hospital Regensburg, Germany
| | - Thomas J Vogl
- Department of Diagnostic and Interventional Radiology, University Hospital Frankfurt, Frankfurt am Main, Germany
| | | | - Frank K Wacker
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Kristina Imeen Ringe
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
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Meyer S, Schmidbauer M, Wacker FK, Ringe KI. To Fill or Not to Fill? - Value of the Administration of Positive Rectal Contrast for CT Evaluation of Diverticular Disease of the Colon. ROFO-FORTSCHR RONTG 2021; 193:804-812. [PMID: 33535255 DOI: 10.1055/a-1339-2157] [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: 11/11/2022]
Abstract
PURPOSE To assess the value of the administration of positive rectal contrast at CT in patients referred for suspected diverticular disease (DD) of the colon. MATERIALS AND METHODS 460 patients (253 male, 207 female; median age 62 years; interquartile range 24) with clinical suspicion of DD of the colon were included in this retrospective IRB-approved study. CT was performed with i. v. contrast only (n = 328, group M1), i. v. + positive rectal contrast (n = 82, group M2), neither i. v. nor rectal contrast (n = 32, group S1), or positive rectal contrast only (n = 19, group S2). Two readers in consensus evaluated all CT datasets concerning diagnosis of DD (yes/no) and categorized findings (classification of diverticular disease (CDD)). Sensitivity, specificity, positive (PPV) and negative (NPV) predictive values for the diagnosis of DD were calculated for all groups, using either clinical follow-up (n = 335) or intraoperative findings (n = 125) as the reference standard. In patients undergoing surgery, radiological staging of DD was correlated with the histopathology (weighted Cohen-k). RESULTS 224 patients (48.7 %) were diagnosed with DD. The sensitivity, specificity, PPV, and NPV were as follows. Group M1 / M2: 92 %/92 %, 97 %/94 %, 96 %/96 %, 94 %/89 %, respectively; group S1 / S2: 94 %/86 %, 93 %/80 %, 94 %/92 %, 93 %/67 %, respectively. Radiological staging and histopathology correlated substantially in all groups (k = 0.748-0.861). CONCLUSION Abdominal CT had a high sensitivity and specificity for the diagnosis of DD. Disease staging correlated well with the findings at surgery. Additional positive rectal contrast administration did not have a significant advantage and may therefore be omitted in patients with suspected DD. KEY POINTS · CT has a high sensitivity and specificity for diagnosis of DD.. · CT staging using the CDD algorithm correlates very well with surgery.. · Positive rectal contrast administration does not improve diagnosis and radiological staging.. CITATION FORMAT · Meyer S, Schmidbauer M, Wacker FK et al. To Fill or Not to Fill? - Value of the Administration of Positive Rectal Contrast for CT Evaluation of Diverticular Disease of the Colon. Fortschr Röntgenstr 2021; 193: 804 - 812.
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Affiliation(s)
- Simone Meyer
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Martina Schmidbauer
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Frank K Wacker
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Kristina Imeen Ringe
- Department of Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
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5
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Schulz A, Müller NV, van de Lest NA, Eisenreich A, Schmidbauer M, Barysenka A, Purfürst B, Sporbert A, Lorenzen T, Meyer AM, Herlan L, Witten A, Rühle F, Zhou W, de Heer E, Scharpfenecker M, Panáková D, Stoll M, Kreutz R. Analysis of the genomic architecture of a complex trait locus in hypertensive rat models links Tmem63c to kidney damage. eLife 2019; 8:42068. [PMID: 30900988 PMCID: PMC6478434 DOI: 10.7554/elife.42068] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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: 09/16/2018] [Accepted: 03/20/2019] [Indexed: 12/23/2022] Open
Abstract
Unraveling the genetic susceptibility of complex diseases such as chronic kidney disease remains challenging. Here, we used inbred rat models of kidney damage associated with elevated blood pressure for the comprehensive analysis of a major albuminuria susceptibility locus detected in these models. We characterized its genomic architecture by congenic substitution mapping, targeted next-generation sequencing, and compartment-specific RNA sequencing analysis in isolated glomeruli. This led to prioritization of transmembrane protein Tmem63c as a novel potential target. Tmem63c is differentially expressed in glomeruli of allele-specific rat models during onset of albuminuria. Patients with focal segmental glomerulosclerosis exhibited specific TMEM63C loss in podocytes. Functional analysis in zebrafish revealed a role for tmem63c in mediating the glomerular filtration barrier function. Our data demonstrate that integrative analysis of the genomic architecture of a complex trait locus is a powerful tool for identification of new targets such as Tmem63c for further translational investigation. The human kidneys filter the entire volume of the blood about 300 times each day. This ability depends on specialized cells, known as podocytes, which wrap around some of the blood vessels in the kidney. These cells control which molecules leave the blood based on their size. Normally large molecules like proteins are blocked, while smaller molecules including waste products, toxins, excess water and salts pass through into the urine. If this filtration system is damaged, by high blood pressure, for example, it can lead to chronic kidney disease. A hallmark of this disease, often called CKD for short, is high levels of the protein albumin in the urine. Previous studies involving rats with high blood pressure have found several regions of the genome that contribute to high levels of albumin in the urine, including one on chromosome 6. However, this region contains several genes and it was unclear which genes affected the condition. Schulz et al. set out to narrow down the list and find specific genes that might contribute to elevated albumin in the urine of rats with high blood pressure. This search identified the gene for a protein called TMEM63c as a likely candidate. This protein spans the outer membrane of podocyte cells. Analysis of kidney biopsies showed that patients with chronic kidney disease also had low levels of this protein in their podocytes. Further experiments, this time in zebrafish, showed that reducing the activity of the gene for tmem63c led to damaged podocytes and a leakier filter in the kidneys. The results suggest that this gene plays an important role in the integrity of the kidneys filtration barrier. It is possible that faulty versions of this gene are behind some cases of chronic kidney disease. If this proves to be the case, a better understanding of the role of this gene may lead to new treatments for the condition.
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Affiliation(s)
- Angela Schulz
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany
| | - Nicola Victoria Müller
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany.,Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Electrochemical Signaling in Development and Disease, Berlin, Germany
| | - Nina Anne van de Lest
- Department of Pathology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Andreas Eisenreich
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany
| | - Martina Schmidbauer
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin, Germany.,Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany
| | - Andrei Barysenka
- Westfälische Wilhelms University, Genetic Epidemiology, Institute for Human Genetics, Münster, Germany
| | - Bettina Purfürst
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Core Facility Electron Microscopy, Berlin, Germany
| | - Anje Sporbert
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Advanced Light Microscopy, Berlin, Germany
| | - Theodor Lorenzen
- Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany
| | | | - Laura Herlan
- Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany
| | - Anika Witten
- Westfälische Wilhelms University, Genetic Epidemiology, Institute for Human Genetics, Münster, Germany
| | - Frank Rühle
- Westfälische Wilhelms University, Genetic Epidemiology, Institute for Human Genetics, Münster, Germany
| | - Weibin Zhou
- Division of Nephrology, Department of Medicine, Center for Human Disease Modeling, Duke University School of Medicine, Durham, United States
| | - Emile de Heer
- Department of Pathology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Marion Scharpfenecker
- Department of Pathology, Leiden University Medical Center (LUMC), Leiden, The Netherlands
| | - Daniela Panáková
- DZHK (German Centre for Cardiovascular Research), Partner site Berlin, Berlin, Germany
| | - Monika Stoll
- Westfälische Wilhelms University, Genetic Epidemiology, Institute for Human Genetics, Münster, Germany.,Department of Biochemistry, Maastricht University, Genetic Epidemiology and Statistical Genetics, Maastricht, The Netherlands
| | - Reinhold Kreutz
- Institute of Clinical Pharmacology and Toxicology, Berlin Institute of Health, Berlin, Germany.,DZHK (German Centre for Cardiovascular Research), Partner site Berlin, Berlin, Germany
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6
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Karches C, Benmebarek M, Schmidbauer M, Kurzay M, Klaus R, Geiger M, Lesch S, Cadilha B, Rataj F, Heise C, Murr R, vom Berg J, Jastroch M, Lamp D, Duewell P, Niederfellner G, Sustmann C, Endres S, Klein C, Kobold S. Proof of concept and mode of action of a novel modular platform for adoptive T cell therapy combining bispecific antibodies with synthetic agonistic receptors. Eur J Cancer 2018. [DOI: 10.1016/j.ejca.2018.01.047] [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: 10/17/2022]
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7
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Benmebarek M, Karches C, Schmidbauer M, Kurzay M, Klaus R, Geiger M, Rataj F, Cadilha B, Keyl J, Lesch S, Heise C, Murr R, vom Berg J, Jastroch M, Lamp D, Niederfellner G, Sustmann C, Endres S, Klein C, Kobold S. Mesothelin-targeted bispecific antibodies drive synthetic agonistic receptor – Transduced T cells to mediate specific and conditional therapy of human pancreatic cancer models. Eur J Cancer 2018. [DOI: 10.1016/j.ejca.2018.01.048] [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: 10/17/2022]
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Getzin T, May M, Schmidbauer M, Gutberlet M, Martirosian P, Oertel R, Wacker F, Schindler C, Hueper K. Usability of Functional MRI in Clinical Studies for Fast and Reliable Assessment of Renal Perfusion and Quantification of Hemodynamic Effects on the Kidney. J Clin Pharmacol 2017; 58:466-473. [DOI: 10.1002/jcph.1034] [Citation(s) in RCA: 5] [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] [Received: 06/20/2017] [Accepted: 09/18/2017] [Indexed: 02/06/2023]
Affiliation(s)
- Tobias Getzin
- Department of Diagnostic and Interventional Radiology; Hannover Medical School; Hannover Germany
| | - Marcus May
- Center for Pharmacology and Toxicology; Clinical Research Center, Hannover Medical School; Hannover Germany
| | - Martina Schmidbauer
- Department of Diagnostic and Interventional Radiology; Hannover Medical School; Hannover Germany
| | - Marcel Gutberlet
- Department of Diagnostic and Interventional Radiology; Hannover Medical School; Hannover Germany
| | - Petros Martirosian
- Department of Diagnostic and Interventional Radiology, Section Experimental Radiology, Medical Faculty; University of Tübingen; Tübingen Germany
| | - Reinhard Oertel
- Institute for Clinical Pharmacology, Medical Faculty; Technical University Dresden; Dresden Germany
| | - Frank Wacker
- Department of Diagnostic and Interventional Radiology; Hannover Medical School; Hannover Germany
| | - Christoph Schindler
- Center for Pharmacology and Toxicology; Clinical Research Center, Hannover Medical School; Hannover Germany
| | - Katja Hueper
- Department of Diagnostic and Interventional Radiology; Hannover Medical School; Hannover Germany
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Hueper K, Schmidbauer M, Thorenz A, Bräsen JH, Gutberlet M, Mengel M, Hartung D, Chen R, Meier M, Haller H, Wacker F, Rong S, Gueler F. Longitudinal evaluation of perfusion changes in acute and chronic renal allograft rejection using arterial spin labeling in translational mouse models. J Magn Reson Imaging 2017; 46:1664-1672. [DOI: 10.1002/jmri.25713] [Citation(s) in RCA: 14] [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] [Received: 01/11/2017] [Accepted: 03/02/2017] [Indexed: 12/17/2022] Open
Affiliation(s)
| | | | | | | | | | - Michael Mengel
- Laboratory Medicine and Pathology; University of Alberta; Edmonton Canada
| | | | | | - Martin Meier
- Institute of Laboratory Animal Science, Imaging Center, Hannover Medical School; Germany
| | | | | | - Song Rong
- Nephrology, Hannover Medical School; Germany
- The Transplantation Center of the affiliated hospital, Zunyi Medical College; Zunyi China
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10
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Schmidbauer M, Chen R, Wang L, Gutberlet M, Bräsen J, Meier M, Madyaningrana K, Vijith V, Wacker F, Immenschuh S, Gueler F, Hueper K. Einfluss des freien Hämoglobins auf die Manifestation des akuten Nierenversagens im Mausmodell – nicht-invasive Untersuchung mittels ASL und T2-Mapping. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600202] [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 Schmidbauer
- Medizinische Hochschule Hannover, Institut für Diagnostische und Interventionelle Radiologie, Hannover
| | - R Chen
- Medizinische Hochschule Hannover, Institut für Nephrologie, Hannover
| | - L Wang
- Medizinische Hochschule Hannover, Institut für Nephrologie, Hannover
| | - M Gutberlet
- Medizinische Hochschule Hannover, Institut für Diagnostische und Interventionelle Radiologie, Hannover
| | - J Bräsen
- Medizinische Hochschule Hannover, Institut für Pathologie, Hannover
| | - M Meier
- Medizinische Hochschule Hannover, Zentrum für Kleintierbildgebung, Hannover
| | - K Madyaningrana
- Medizinische Hochschule Hannover, Institut für Transfusionsmedizin, Hannover
| | - V Vijith
- Medizinische Hochschule Hannover, Institut für Transfusionsmedizin, Hannover
| | - F Wacker
- Medizinische Hochschule Hannover, Institut für Diagnostische und Interventionelle Radiologie, Hannover
| | - S Immenschuh
- Medizinische Hochschule Hannover, Institut für Transfusionsmedizin, Hannover
| | - F Gueler
- Medizinische Hochschule Hannover, Institut für Nephrologie, Hannover
| | - K Hueper
- Medizinische Hochschule Hannover, Institut für Diagnostische und Interventionelle Radiologie, Hannover
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11
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Getzin T, May M, Schmidbauer M, Gutberlet M, Wacker F, Schindler C, Hueper K. Funktionelle MRT zur Quantifizierung des pharmakotherapeutischen Effektes eines ACE-Hemmers auf die Nierenperfusion und die T1-Relaxationszeit. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600190] [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)
- T Getzin
- Medizinische Hochschule Hannover, Radiologie, Hannover
| | - M May
- Medizinische Hochschule Hannover, CRC Core Facility, Hannover
| | - M Schmidbauer
- Medizinische Hochschule Hannover, Diagnostische und Interventionelle Radiologie, Hannover
| | - M Gutberlet
- Medizinische Hochschule Hannover, Diagnostische und Interventionelle Radiologie, Hannover
| | - F Wacker
- Medizinische Hochschule Hannover, Diagnostische und Interventionelle Radiologie, Hannover
| | - C Schindler
- Medizinische Hochschule Hannover, CRC Core Facility, Hannover
| | - K Hueper
- Medizinische Hochschule Hannover, Diagnostische und Interventionelle Radiologie, Hannover
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12
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Hueper K, Gutberlet M, Bräsen JH, Jang MS, Thorenz A, Chen R, Hertel B, Barrmeyer A, Schmidbauer M, Meier M, von Vietinghoff S, Khalifa A, Hartung D, Haller H, Wacker F, Rong S, Gueler F. Multiparametric Functional MRI: Non-Invasive Imaging of Inflammation and Edema Formation after Kidney Transplantation in Mice. PLoS One 2016; 11:e0162705. [PMID: 27632553 PMCID: PMC5025122 DOI: 10.1371/journal.pone.0162705] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 08/27/2016] [Indexed: 11/19/2022] Open
Abstract
Background Kidney transplantation (ktx) in mice is used to learn about rejection and to develop new treatment strategies. Past studies have mainly been based on histological or molecular biological methods. Imaging techniques to monitor allograft pathology have rarely been used. Methods Here we investigated mice after isogenic and allogenic ktx over time with functional MRI with diffusion-weighted imaging (DWI) and mapping of T2-relaxation time (T2-mapping) to assess graft inflammation and edema formation. To characterize graft pathology, we used PAS-staining, counted CD3-positive T-lymphocytes, analyzed leukocytes by means flow cytometry. Results DWI revealed progressive restriction of diffusion of water molecules in allogenic kidney grafts. This was paralleled by enhanced infiltration of the kidney by inflammatory cells. Changes in tissue diffusion were not seen following isogenic ktx. T2-times in renal cortex were increased after both isogenic and allogenic transplantation, consistent with tissue edema due to ischemic injury following prolonged cold ischemia time of 60 minutes. Lack of T2 increase in the inner stripe of the inner medulla in allogenic kidney grafts matched loss of tubular autofluorescence and may result from rejection-driven reductions in tubular water content due to tubular dysfunction and renal functional impairment. Conclusions Functional MRI is a valuable non-invasive technique for monitoring inflammation, tissue edema and tubular function. It permits on to differentiate between acute rejection and ischemic renal injury in a mouse model of ktx.
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Affiliation(s)
- Katja Hueper
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
- * E-mail:
| | - Marcel Gutberlet
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | | | - Mi-Sun Jang
- Department of Nephrology, Hannover Medical School, Hannover, Germany
| | - Anja Thorenz
- Department of Nephrology, Hannover Medical School, Hannover, Germany
| | - Rongjun Chen
- Department of Nephrology, Hannover Medical School, Hannover, Germany
- The kidney disease centre of the First Affiliated Hospital, Zhejiang University, Hangzhou, China
| | - Barbara Hertel
- Department of Nephrology, Hannover Medical School, Hannover, Germany
| | - Amelie Barrmeyer
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Martina Schmidbauer
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Martin Meier
- Institute for Laboratory Animal Science, Hannover Medical School, Hannover, Germany
| | | | | | - Dagmar Hartung
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Hermann Haller
- Department of Nephrology, Hannover Medical School, Hannover, Germany
| | - Frank Wacker
- Institute for Diagnostic and Interventional Radiology, Hannover Medical School, Hannover, Germany
| | - Song Rong
- Department of Nephrology, Hannover Medical School, Hannover, Germany
- The Transplantation Center of the affiliated hospital, Zunyi Medical College, Zunyi, China
| | - Faikah Gueler
- Department of Nephrology, Hannover Medical School, Hannover, Germany
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13
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Held M, Doppert N, Grün M, Holl R, Kaiser R, Karl S, Schmidbauer M, Wilkens H, Schäfers HJ, Jany B. Improvement of dead space ventilation, gas exchange, functional capacity and quality of life following pulmonary endarterectomy. Pneumologie 2015. [DOI: 10.1055/s-0035-1544809] [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: 10/24/2022]
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14
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Held M, Gött F, Holl R, Hübner G, Romen T, Schmidbauer M, Walthelm J, Walter F, Jany B. Outcome nach akuter Lungenembolie – Ergebnisse des prospektiven Würzburger LAE-Registers „PHNLE“. Pneumologie 2015. [DOI: 10.1055/s-0035-1544767] [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: 10/24/2022]
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15
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Held M, Hoegen D, Gött F, Holl R, Hübner G, Romen T, Walter F, Walthelm J, Schmidbauer M, Jany B. Klinisches Erscheinungsbild und Management der Lungenembolie: Ergebnisse aus dem Würzburger LAE-Register. Pneumologie 2015. [DOI: 10.1055/s-0035-1544865] [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: 10/24/2022]
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16
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Abstract
For the first time, n-type homoepitaxial semiconducting β-Ga2O3 layers were attained by MOVPE.
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Affiliation(s)
- D. Gogova
- Central Lab of Solar Energy and New Energy Sources at the Bulg. Acad. Sci
- Sofia, Bulgaria
| | - M. Schmidbauer
- Leibniz Institute for Crystal Growth
- 12 489 Berlin, Germany
| | - A. Kwasniewski
- Leibniz Institute for Crystal Growth
- 12 489 Berlin, Germany
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17
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Baldini M, Gogova D, Irmscher K, Schmidbauer M, Wagner G, Fornari R. Heteroepitaxy of Ga2(1-x)In2xO3layers by MOVPE with two different oxygen sources. Crystal Research and Technology 2014. [DOI: 10.1002/crat.201300410] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- M. Baldini
- Leibniz Institute for Crystal Growth; Berlin Germany
| | - D. Gogova
- Leibniz Institute for Crystal Growth; Berlin Germany
| | - K. Irmscher
- Leibniz Institute for Crystal Growth; Berlin Germany
| | | | - G. Wagner
- Leibniz Institute for Crystal Growth; Berlin Germany
| | - R. Fornari
- Leibniz Institute for Crystal Growth; Berlin Germany
- Present address: Department of Physics and Earth Sciences; Università di Parma; Parma Italy
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18
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Mazur YI, Dorogan VG, de Souza LD, Fan D, Benamara M, Schmidbauer M, Ware ME, Tarasov GG, Yu SQ, Marques GE, Salamo GJ. Effects of AlGaAs cladding layers on the luminescence of GaAs/GaAs1-xBix/GaAs heterostructures. Nanotechnology 2014; 25:035702. [PMID: 24346504 DOI: 10.1088/0957-4484/25/3/035702] [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] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The structural and optical properties of GaAs1-xBix quantum wells (QWs) symmetrically clad by GaAs barriers with and without additional confining AlGaAs layers are studied. It is shown that a GaAs/GaAs1-xBix/GaAs QW with x ~ 4% and well width of ~ 4 nm grown by molecular beam epitaxy demonstrates efficient photoluminescence (PL) that becomes significantly more thermally stable when a cladding AlGaAs layer is added to the QW structure. The PL behavior for temperatures between 10 and 300 K and for excitation intensities varying by seven orders of magnitude can be well described in terms of the dynamics of excitons including carrier capture in the QW layer, thermal emission and diffusion into the cladding barriers. Understanding the role of these processes in the luminescence of dilute GaAs1-xBix QW structures facilitates the creation of highly efficient devices with reduced thermal sensitivity and low threshold current.
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Affiliation(s)
- Yu I Mazur
- Institute for Nanoscience and Engineering, University of Arkansas, 731 W Dickson Street, Fayetteville, AR 72701, USA
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19
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Schulz A, Herlan L, Schmidbauer M, Kreutz R. Abstract 520: Fine Mapping of Two Loci Within a Major Albuminuria QTL on Rat Chromosome 6 That Affect Both Albuminuria and Deficient Nephron Development in The Munich Wistar Frömter Rat. Hypertension 2013. [DOI: 10.1161/hyp.62.suppl_1.a520] [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: 11/16/2022]
Abstract
We previously confirmed in the Munich Wistar Frömter (MWF) rat a functional role of a major quantitative trait locus (QTL) on rat chromosome (RNO)6 for both albuminuria development and an inherited nephron deficit in the consomic strain MWF-6SHR. We addressed the question whether an inherited nephron deficit is linked to the genetic basis of albuminuria and whether common genetic factors are responsible for both phenotypes in this rat model.
We generated congenic lines to dissect the RNO6-QTL using SHR rats with low albuminuria as a reference strain. Chromosomal fine mapping was performed by breeding of subcongenic lines, comparative genome analysis and physical mapping. The nephron number was determined by determination of the glomerular density in animals at 4 weeks of age; this method was validated by comparison with the absolute nephron numbers as determined by the physical fractionator method in parental strains.
Phenotyping of the congenic lines covering the RNO6-QTL demonstrated that both the albuminuria and the nephron locus were subdivided into at least two different colocalized informative loci. One interval defined by the congenic lines MWF.SHR-(D6Rat1-D6Rat81) and MWF.SHR-(D6Rat1-D6Rat117) covers 2.1 Mb and contains 26 known genes. Exchange of this locus had a strong impact on albuminuria at 8 weeks of age resulting in a decrease from 18.1 to 5.0 mg/24 h (p<0.0001) between the congenic strains and affected also the glomerular density (184 vs. 223 /mm
3
, p=0.0004). The second interval flanked by the congenic lines MWF.SHR-(D6Rat1-D6Rat117) and MWF.SHR-(D6Rat1-D6Mgh4) encompasses 2.8 Mb and contains 49 known genes. This interval influenced also albuminuria (decrease from 5.0 to 1.5 mg/24h, p=0.0001) and glomerular density (223 vs. 243 /mm
3
, p=0.008). These findings support the genetic link between albuminuria and nephron deficit in this model and provide the basis for further functional and comparative genomic analysis to obtain new insights into this association.
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Affiliation(s)
- Angela Schulz
- Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Laura Herlan
- Charité-Universitätsmedizin Berlin, Berlin, Germany
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20
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Held M, Schmidbauer M, Holl R, Jany B. Septischer Schock und Multiorganversagen bei Lungentuberkulose. Pneumologie 2013. [DOI: 10.1055/s-0033-1334562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Buschmann C, Schmidbauer M, Tsokos M. Maternal and pregnancy-related death: causes and frequencies in an autopsy study population. Forensic Sci Med Pathol 2013; 9:296-307. [PMID: 23275021 DOI: 10.1007/s12024-012-9401-7] [Citation(s) in RCA: 7] [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] [Accepted: 12/13/2012] [Indexed: 12/27/2022]
Abstract
BACKGROUND Maternal deaths during pregnancy, both from pregnancy-related or other causes, are rare in Western industrialized countries. In this study we report maternal and pregnancy-related deaths in a large autopsy population focusing on medical history, autopsy findings and histological examinations. MATERIALS AND METHODS Medico-legal autopsy files (n = 11,270) from the Institute of Legal Medicine and Forensic Sciences, University Medical Centre Charité, University of Berlin, and the State Institute of Legal and Social Medicine, Berlin, from 2005 to 2010 were reviewed. All female cases between 15 and 49 years were checked for maternal and pregnancy-related death, and deaths of pregnant women from non-natural causes were also included. Fatalities that met the chosen criteria were classified as "direct gestational death," "indirect gestational death" or "non-gestational death." RESULTS 13 female fatalities (0.12 %) met the chosen criteria (median age 28 years ± 6.87 SD). Eight (61.5 %) women died in-hospital, four (30.8 %) at home, and one woman died in public. Three cases (23.1 %) were "non-gestational deaths," and one case (7.7 %) remained unclear after autopsy and additional examinations. Of the remaining nine cases, six cases (46.5 %) were "direct gestational deaths," and two cases (15.4 %) were "indirect gestational deaths." One case (7.7 %) was not to be defined as "late maternal death," but the cause of death seemed to be directly related to previous gestation ["(very) late maternal death"]. CONCLUSION Maternal deaths during pregnancy, both from pregnancy-related or other causes, remain an uncommon event in routine forensic autopsy practice. We report on the collection and analysis of maternal and pregnancy-related deaths in a large autopsy population, with particular attention to the phenomenology of pregnancy, pathophysiological changes in different organ systems and their detection, and the forensic autopsy assessment.
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Affiliation(s)
- Claas Buschmann
- Institute of Legal Medicine and Forensic Sciences, University Medical Centre Charité, University of Berlin, Turmstr. 21, Building N, 10559, Berlin, Germany.
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22
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Kopp VS, Kaganer VM, Schwarzkopf J, Waidick F, Remmele T, Kwasniewski A, Schmidbauer M. X-ray diffraction from nonperiodic layered structures with correlations: analytical calculation and experiment on mixed Aurivillius films. Acta Crystallogr A 2011; 68:148-55. [PMID: 22186291 DOI: 10.1107/s0108767311044874] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Accepted: 10/26/2011] [Indexed: 11/10/2022] Open
Abstract
X-ray diffraction from films consisting of layers with different thicknesses, structures and chemical contents is analysed. The disorder is described by probabilities for different sequences of layers. Closed analytical expressions for the diffracted X-ray intensity are obtained when the layers form a stationary Markov chain. The proposed model is applied to the diffraction data from epitaxial sodium bismuth titanate thin films with Aurivillius structure possessing such one-dimensional disorder. In this case, the disorder is caused by a random stacking of three and four perovskite units separated by bismuth oxide interlayers. The results of analytical calculations are in good agreement with the experimental data and indicate that the incorporation of sodium in the Bi(4)Ti(3)O(12) phase causes the formation of a fourth perovskite unit.
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Affiliation(s)
- V S Kopp
- Paul-Drude-Institute for Solid State Electronics, Berlin, Germany.
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23
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Mazur YI, Dorogan VG, Schmidbauer M, Tarasov GG, Johnson SR, Lu X, Yu SQ, Wang ZM, Tiedje T, Salamo GJ. Optical evidence of a quantum well channel in low temperature molecular beam epitaxy grown Ga(AsBi)/GaAs nanostructure. Nanotechnology 2011; 22:375703. [PMID: 21852736 DOI: 10.1088/0957-4484/22/37/375703] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A Ga(AsBi) quantum well (QW) with Bi content reaching 6% and well width of 11 nm embedded in GaAs is grown by molecular beam epitaxy at low temperature and studied by means of high-resolution x-ray diffraction, photoluminescence (PL), and time-resolved PL. It is shown that for this growth regime, the QW is coherently strained to the substrate with a low dislocation density. The low temperature PL demonstrates a comparatively narrow excitonic linewidth of ∼ 40 meV. For high excitation density distinct QW excited states evolve in the emission spectra. The origins of peculiar PL dependences on temperature and excitation density are interpreted in terms of intra-well optical transitions.
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Affiliation(s)
- Yu I Mazur
- Department of Physics, University of Arkansas, Fayetteville, AR 72701, USA.
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24
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Gogova D, Albrecht M, Remmele T, Irmscher K, Siche D, Rost HJ, Schmidbauer M, Fornari R, Yakimova R. Microscopic lateral overgrowth by physical vapour transport of GaN on self-organized diamond-like carbon masks. Cryst Res Technol 2009. [DOI: 10.1002/crat.200900526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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25
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Schmidbauer M, Schäfer P, Besedin S, Grigoriev D, Köhler R, Hanke M. A novel multi-detection technique for three-dimensional reciprocal-space mapping in grazing-incidence X-ray diffraction. J Synchrotron Radiat 2008; 15:549-557. [PMID: 18955760 DOI: 10.1107/s0909049508023856] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2008] [Accepted: 07/28/2008] [Indexed: 05/27/2023]
Abstract
A new scattering technique in grazing-incidence X-ray diffraction geometry is described which enables three-dimensional mapping of reciprocal space by a single rocking scan of the sample. This is achieved by using a two-dimensional detector. The new set-up is discussed in terms of angular resolution and dynamic range of scattered intensity. As an example the diffuse scattering from a strained multilayer of self-assembled (In,Ga)As quantum dots grown on GaAs substrate is presented.
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Affiliation(s)
- M Schmidbauer
- Leibniz Institut für Kristallzüchtung, Max-Born-Strasse 2, D-12489 Berlin, Germany.
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26
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Schmidbauer M, Xu L, Wang Y, Li Y, Li J, Wang Y, Cui T, Li J, Jonas JB. Ursachen von Blindheit und Sehbeeinträchtigung in städtischen und ländlischen Gebieten in Beijing. Klin Monbl Augenheilkd 2008. [DOI: 10.1055/s-2008-1057964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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27
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Rauschka H, Colsch B, Baumann N, Wevers R, Schmidbauer M, Krammer M, Turpin JC, Lefevre M, Olivier C, Tardieu S, Krivit W, Moser H, Moser A, Gieselmann V, Zalc B, Cox T, Reuner U, Tylki-Szymanska A, Aboul-Enein F, LeGuern E, Bernheimer H, Berger J. Late-onset metachromatic leukodystrophy: genotype strongly influences phenotype. Neurology 2006; 67:859-63. [PMID: 16966551 DOI: 10.1212/01.wnl.0000234129.97727.4d] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.7] [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: 12/24/2022] Open
Abstract
BACKGROUND P426L and I179S are the two most frequent mutations in juvenile and adult metachromatic leukodystrophy (late-onset MLD), which, in contrast to infantile MLD, show marked phenotypic heterogeneity. OBJECTIVE To search for genotype-phenotype correlations in late-onset MLD. METHODS The authors reviewed the clinical course of 22 patients homozygous for mutation P426L vs 20 patients heterozygous for mutation I179S, in which the second arylsulfatase A (ASA) mutation had also been determined. RESULTS P426L homozygotes principally presented with progressive gait disturbance caused by spastic paraparesis or cerebellar ataxia; mental disturbance was absent or insignificant at the onset of disease but became more apparent as the disease evolved. In contrast, compound heterozygotes for I179S presented with schizophrenia-like behavioral abnormalities, social dysfunction, and mental decline, but motor deficits were scarce. Reduced peripheral nerve conduction velocities and less residual ASA activity were present in P426L homozygotes vs I179S heterozygotes. CONCLUSION The characteristic clinical differences between homozygous P426L and compound heterozygous I179S patients establish a distinct genotype-phenotype correlation in late-onset metachromatic leukodystrophy.
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Affiliation(s)
- H Rauschka
- Center for Brain Research, Medical University of Vienna, Department of Neurology, Hospital Lainz, Austria
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28
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Schmidbauer M, Seydmohamadi S, Grigoriev D, Wang ZM, Mazur YI, Schäfer P, Hanke M, Köhler R, Salamo GJ. Controlling planar and vertical ordering in three-dimensional (In,Ga)As quantum dot lattices by GaAs surface orientation. Phys Rev Lett 2006; 96:066108. [PMID: 16606019 DOI: 10.1103/physrevlett.96.066108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2005] [Indexed: 05/08/2023]
Abstract
Anisotropic surface diffusion and strain are used to explain the formation of three-dimensional (In,Ga)As quantum dot lattices. The diffusion characteristics of the surface, coupled with the elastic anisotropy of the matrix, provides an excellent opportunity to influence the dot positions. In particular, quantum dots that are laterally organized into long chains or chessboard two-dimensional arrays vertically organized with strict vertical ordering or vertical ordering that is inclined to the sample surface normal are accurately predicted and observed.
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Affiliation(s)
- M Schmidbauer
- Institut für Kristallzüchtung, D-12489 Berlin, Germany
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29
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Affiliation(s)
- H Rauschka
- Department of Neurology, Hospital Lainz, Vienna, Austria.
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30
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Seidl U, Giesel FL, Cantz M, Schmidbauer M, Schröder J, Pantel J. Ungew�hnlicher Verlauf einer ?-Mannosidose mit Symptomen einer paranoid-halluzinatorischen Psychose. Nervenarzt 2005; 76:335-8. [PMID: 15759164 DOI: 10.1007/s00115-004-1720-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We report the case of a 27-year-old female with recurrent paranoid-hallucinatory episodes who was initially diagnosed as suffering from schizophrenic psychosis. After 10 years of treatment under this diagnosis, alpha-mannosidosis was identified to be the underlying cause of her psychiatric symptoms. alpha-Mannosidosis is a rare autosomal recessive lysosomal storage disorder associated with decreased activity of the enzyme mannosidase. In the present case, diagnosis was made late in the illness after failure of a response to antipsychotic treatment and with the patient additionally showing progressive cognitive decline. Only after extensive investigation was the diagnosis made by showing decreased alpha-mannosidase enzyme activity in serum and blood leukocytes. This case demonstrates that an unusual clinical course or striking symptom patterns, especially in association with somatic comorbidity, in psychotic patients should lead to diagnostic consideration of inherited metabolic disease.
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Affiliation(s)
- U Seidl
- Sektion Gerontopsychiatrie, Psychiatrische Universitätsklinik Heidelberg.
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32
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Höftberger R, Aboul-Enein F, Brueck W, Lucchinetti C, Rodriguez M, Schmidbauer M, Jellinger K, Lassmann H. Expression of major histocompatibility complex class I molecules on the different cell types in multiple sclerosis lesions. Brain Pathol 2004; 14:43-50. [PMID: 14997936 PMCID: PMC8095881 DOI: 10.1111/j.1750-3639.2004.tb00496.x] [Citation(s) in RCA: 162] [Impact Index Per Article: 8.1] [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: 01/08/2023] Open
Abstract
Multiple sclerosis is considered to be an immune-mediated disease of the central nervous system, characterized by chronic inflammation, primary demyelination and axonal damage. The mechanisms of demyelination and axonal injury are heterogeneous and complex. One possible mechanism is direct damage of oligodendrocytes and neurons by Class I MHC restricted cytotoxic T-cells. In this study we analyzed the expression of functional MHC class I molecule complex, consisting of alpha-chain and beta2-microglobulin, in a large sample of human autopsy material, containing 10 cases of acute MS, 10 cases of chronic active MS, 10 cases of chronic inactive MS and 21 controls. To examine the expression of MHC class I and II molecules on the different cell-types in brain, we used quantitative immunohistochemical techniques, double staining and confocal laser microscopy scans on paraffin embedded sections. We found constitutive expression of MHC class I molecule on microglia and endothelial cells. A hierarchical up-regulation of MHC class I was present on astrocytes, oligodendrocytes, neurons and axons, depending upon the severity of the disease and the activity of the lesions. MHC class II molecules were expressed on microglia and macrophages, but not on astrocytes. These data indicate that in MS lesions all cells of the central nervous system are potential targets for Class I MHC restricted cytotoxic T-cells.
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Affiliation(s)
- R Höftberger
- Division of Neuroimmunology, Brain Research Institute, University of Vienna, Wien, Austria
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Rauschka H, Jellinger K, Lassmann H, Braier F, Schmidbauer M. Guillain-Barré syndrome with marked pleocytosis or a significant proportion of polymorphonuclear granulocytes in the cerebrospinal fluid: neuropathological investigation of five cases and review of differential diagnoses. Eur J Neurol 2003; 10:479-86. [PMID: 12940826 DOI: 10.1046/j.1468-1331.2003.00644.x] [Citation(s) in RCA: 23] [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: 11/20/2022]
Abstract
In cases with otherwise clinically typical Guillain-Barré syndrome (GBS), pronounced cerebrospinal fluid (CSF) pleocytosis or the mere presence of CSF-polymorphonuclear granulocytes should alert the physician to consider alternative diagnoses. Therefore, we retrospectively studied the neuropathology of central and peripheral nervous system in two cases with a CSF cell count of more than 50/microl and in three cases with a significant proportion of polymorphonuclear granulocytes in the CSF sediment. All cases fulfilled the required criteria for the diagnosis of GBS, the duration from onset to death ranged from 4 to 100 days. Neuropathological investigations included routine staining procedures and immunohistochemistry for antigens of glial and haematopoetic cells as well as for products of relevant neurotropic viruses. Demyelinating polyradiculitis was present in four cases, in one patient with a survival time of 4 days the type of damage to myelinated fibres was unclassifiable. In the central nervous system a consistent finding was diffuse activation of microglia, only one case showed mild meningeal and lower brainstem inflammation. Viral products were generally absent. In summary, the neuropathological findings confirm that marked CSF pleocytosis or the presence of polymorphonuclear granulocytes does not rule out the diagnosis of GBS.
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Affiliation(s)
- H Rauschka
- Department of Neurology, Hospital Lainz, Vienna, Austria
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Abstract
Whether patients with Behçet's disease (BD) and immunosuppressive therapy are generally prone to acquire severe infectious diseases is unknown. A 48-year-old man under corticosteroids and azathioprine for BD since 1995 was admitted because of a transitory ischemic attack. Between the third and fourth hospital day he was accidentally locked up, insufficiently dressed, in the hospital's chapel over night. On the following day, he developed fever and deteriorating consciousness until he became comatose. CT scans of the brain were normal and there was only a slight pleocytosis. Despite adequate therapy, the patient's condition further deteriorated such that he died. Responsible for his decline was a fulminate sepsis, diagnosed upon fever, increased C-reactive protein, thrombocyte decline, multi-organ failure, rhabdomyolysis, growth of S. aureus on blood culture, and autopsy. Patients with BD and immunosuppressive therapy, may be more vulnerable to infections and may develop lethal overwhelming sepsis already after overnight cold exposure.
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Djamshidian A, Grassl R, Seltenhammer M, Czech T, Baumgartner C, Schmidbauer M, Ulrich W, Zimprich F. Altered expression of voltage-dependent calcium channel alpha(1) subunits in temporal lobe epilepsy with Ammon's horn sclerosis. Neuroscience 2002; 111:57-69. [PMID: 11955712 DOI: 10.1016/s0306-4522(01)00528-0] [Citation(s) in RCA: 24] [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: 11/30/2022]
Abstract
Voltage-dependent calcium channels, the initial components in the calcium signalling cascade, are increasingly being recognised as relevant factors in the pathology of epilepsy. To further characterise their role in temporal lobe epilepsy associated with Ammon's horn sclerosis, we investigated the immunohistochemical distribution of five different voltage-dependent calcium channel alpha(1) subunits (alpha(1A), alpha(1B), alpha(1C), alpha(1D), alpha(1E)) in 14 hippocampal specimens of patients with Ammon's horn sclerosis in comparison with eight autopsy control cases. In epilepsy specimens an increased immunoreactivity was observed for alpha(1A), alpha(1B), alpha(1D) and alpha(1E) in the neuropil of the dentate gyrus molecular layer. Dentate gyrus granule cells and residual CA3 pyramidal neurones showed enhanced immunoreactivity for alpha(1A), while labelling of these neurones was decreased for alpha(1C). Astrocytes in Ammon's horn sclerosis specimens were strongly immunoreactive for the alpha(1C) subunit contrasting with an absent astrocytic alpha(1C) labelling in controls. Our results suggest that the expression of calcium channels in neurones and glial cells is dynamically regulated in temporal lobe epilepsy, supporting the relevance of calcium signalling pathways for this disease.
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Affiliation(s)
- A Djamshidian
- University Department of Neurology, University of Vienna, Vienna General Hospital, Austria
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Kornek B, Storch MK, Bauer J, Djamshidian A, Weissert R, Wallstroem E, Stefferl A, Zimprich F, Olsson T, Linington C, Schmidbauer M, Lassmann H. Distribution of a calcium channel subunit in dystrophic axons in multiple sclerosis and experimental autoimmune encephalomyelitis. Brain 2001; 124:1114-24. [PMID: 11353727 DOI: 10.1093/brain/124.6.1114] [Citation(s) in RCA: 108] [Impact Index Per Article: 4.7] [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: 11/13/2022] Open
Abstract
Multiple sclerosis and experimental autoimmune encephalomyelitis (EAE) are immune-mediated diseases of the CNS. They are characterized by widespread inflammation, demyelination and a variable degree of axonal loss. Recent magnetic resonance spectroscopy studies have indicated that axonal damage and loss are a reliable correlate of permanent clinical disability. Accordingly, neuropathological studies have confirmed the presence and timing of axonal injury in multiple sclerosis lesions. The mechanisms of axonal degeneration, however, are unclear. Since calcium influx may mediate axonal damage, we have studied the distribution of the pore-forming subunit of neuronal (N)-type voltage-gated calcium channels in the lesions of multiple sclerosis and EAE. We found that alpha(1B), the pore-forming subunit of N-type calcium channels, was accumulated within axons and axonal spheroids of actively demyelinating lesions. The axonal staining pattern of alpha(1B) was comparable with that of beta-amyloid precursor protein, which is an early and sensitive marker for disturbance of axonal transport. Importantly, within these injured axons, alpha(1B) was not only accumulated, but also integrated in the axoplasmic membrane, as shown by immune electron microscopy on the EAE material. This ectopic distribution of calcium channels in the axonal membrane may result in increased calcium influx, contributing to axonal degeneration, possibly via the activation of neutral proteases. Our data suggest that calcium influx through voltage-dependent calcium channels is one possible candidate mechanism for axonal degeneration in inflammatory demyelinating disorders.
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Affiliation(s)
- B Kornek
- Department of Neuroimmunology, Brain Research Institute, University of Vienna, Spitalgasse 4, A-1090 Vienna, Austria
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Schmidbauer M. [Development of academic clinical neurology in Europe; a successful concept and its consequences]. Wien Med Wochenschr 2001; 150:274-7. [PMID: 11075427] [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] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Clinical medicine in the 18th century is devoted to Hippocratic tradition. Pathology is not a requisite in this concept. The viewpoint of the pathologists is obscured by traditional philosophy and hampered by insufficient methods. In the 19th century, concepts of correlation between clinical signs and local organ pathology occur. The catastrophic increase of traumatic injury of the nervous system during world war I results in better concepts of clinical localization. At the beginning of the 21st century, the traditional view of the neurological science has changed the image of the patient profoundly, by the emergence of new diseases, disappearance of others and an altered view of the traditional neurologist.
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Affiliation(s)
- M Schmidbauer
- Neurologischen Abteilung des Krankenhauses der Stadt Wien-Lainz.
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Abstract
Thirteen autopsy cases of patients with clinical criteria of the Guillain-Barré syndrome were investigated for pathological changes and cellular composition of inflammatory infiltrates in the CNS and PNS. The survival times from the onset of neurological symptoms until death ranged from 1 day to 12 months. In the CNS, degeneration of spinal posterior tracts was seen in three cases. Mononuclear infiltrates consisted of evenly proportioned lymphocytes and macrophages in cases with survival of 1 and 2 days, whereas macrophages predominated in cases with survival of 5 days and longer. Infiltrates presented as nodular clusters around blood vessels and neurons, or were scattered diffusely. They were found within the spinal cord in eight out of 13 cases, within the medulla oblongata in eight out of 12 cases, within the pons in five out of nine cases, and in one out of four midbrains. Activation of microglia, either focal or diffuse, was found in various degrees in 11 out of 13 cases, involving the spinal cord (six out of 13 cases), the medulla oblongata (10 out of 12 cases), the pons (five out of nine cases) or as subependymal rims along the walls of the ventricular system and the central canal of the spinal cord (seven out of 13 cases). In the PNS, myelin loss (12 out of 13 cases), axonal degeneration (six out of 13 cases) and mononuclear cell infiltrates (13 out of 13 cases) were seen in segmental and cranial nerves, spinal ganglia and spinal roots in varying distribution and severity. Mononuclear cell infiltrates were composed of macrophages and T lymphocytes, with even distribution in cases with short survival (1 and 2 days), and predominance of macrophages in cases with protracted clinical course. T lymphocytes were equally composed of OPD4+ and CD8+ cells without obvious differences between cases of short and long duration, or between PNS and CNS infiltrates in 11 out of 12 cases, whilst two cases had a dominant OPD4+ subset. We conclude that CNS pathology is frequent in patients with Guillain-Barré syndrome. It involves axons with secondary myelin impairment, microglial activation and inflammatory infiltration. In this series, primary demyelination is not found in the CNS. Changes such as degeneration of spinal posterior tracts are secondary to pathology in the PNS. Inflammatory cell reactions in the CNS are similar to those in the PNS and to CNS pathology in experimental allergic neuritis. This inflammation might reflect CNS immune activation in the absence of the relevant antigen, in addition to cellular reactions accompanying secondary CNS changes. The presence of distinct pathology in the CNS is in contrast with other recent studies on the pathology of Guillain-Barré syndrome which, unlike this study, may have been influenced by recently introduced treatments.
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Affiliation(s)
- H Maier
- Institute of Neurology, University of Vienna, Austria
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Stepanov SA, Kondrashkina EA, Schmidbauer M, Köhler R, Pfeiffer J, Jach T, Souvorov AY. Diffuse scattering from interface roughness in grazing-incidence x-ray diffraction. Phys Rev B Condens Matter 1996; 54:8150-8162. [PMID: 9984496 DOI: 10.1103/physrevb.54.8150] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Kondrashkina EA, Stepanov SA, Opitz R, Schmidbauer M, Köhler R, Hey R, Wassermeier M. X-ray reflectivity and diffuse scattering study of roughness anisotropy in AlAs/GaAs superlattices. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396080555] [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: 11/11/2022] Open
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Stepanov SA, Kondrashkina EA, Schmidbauer M, Köhler R, Pfeiffer UJ, Jach T, Souvorov AY. Measurements of atomic ordering in roughness with grazing incidence X-ray diffraction. Acta Crystallogr A 1996. [DOI: 10.1107/s0108767396080622] [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: 11/10/2022] Open
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Schmidbauer M. [Barbers, hairdressers and people who took care of the sick]. Pflege Aktuell 1996; 50:98-9. [PMID: 8715283] [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: 02/01/2023]
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Schmidbauer M, Hainfellner JA, Budka H. [Sporadic juvenile amyotrophic lateral sclerosis with neuronal basophil inclusion bodies--a nosologic entity?]. Wien Med Wochenschr 1996; 146:201-2. [PMID: 9012212] [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] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Among the very few cases of juvenile sporadic amyotrophic lateral sclerosis (ALS), 6 cases with neuronal basophilic inclusion bodies (BI) and clinical features uncommon to "classical" adult sporadic ALS have been reported. We present here two further cases and review the relevant literature. There are clinical and neuropathological similarities of systemic degeneration between juvenile cases with or without BI and juvenile and adult sporadic ALS when the latter is allowed to run a protracted course in patients on respirators. Because of overlapping topology and neuronal cytoskeletal pathology, the nosologic distinction within the ALS spectrum is questionable.
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Affiliation(s)
- M Schmidbauer
- Klinischen Institut für Neurologie, Universität Wien
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Wanschitz J, Schmidbauer M, Maier H, Rössler K, Vorkapic P, Budka H. Suprasellar meningioma with expression of glial fibrillary acidic protein: a peculiar variant. Acta Neuropathol 1995; 90:539-44. [PMID: 8560989 DOI: 10.1007/bf00294817] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A 24-year-old female presented with a 3-year history of a suprasellar and intraventricular solid midline process measuring about 3 x 4 cm. At surgery, this tumour was sharply delineated and of stone-like firmness and was removed completely. Histology suggested meningioma, featuring nests and cords of epithelium-like cells with prominent cytoplasm amidst abundant fibrous stroma with prominent lymphoplasmocellular infiltration. Immunocytochemically, the tumour cells expressed vimentin, S-100 protein, epithelial membrane antigen, cytokeratins, and most surprisingly, glial fibrillary acidic protein (GFAP). Ultrastructural investigation revealed abundant intermediate filaments and occasionally dense secretory granules in tumour cells with short, finger-like cytoplasmic processes joined by very rare small, but well-developed desmosomes. This tumour most likely represents a peculiar variant of meningioma with prominent production of GFAP, as previously described [Budka H (1986) Acta Neuropathol (Berl) 72: 43-54].
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Affiliation(s)
- J Wanschitz
- Institute of Neurology, University of Vienna, Austria
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Schmidbauer M, Kilcoyne AL, Köppe H, Feldhaus J, Bradshaw AM. Shape resonances and multielectron effects in the core-level photoionization of CO2. Phys Rev A 1995; 52:2095-2108. [PMID: 9912469 DOI: 10.1103/physreva.52.2095] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Abstract
A patient is presented with posterior ischemic optic neuropathy (PION) after bilateral radical neck dissection, probably caused by hemodynamic hypotension, combined with other factors. A postmortem histologic study of the optic nerve was performed to analyze the pathogenic mechanism of blindness. To prevent this complication, one should favor a two-stage procedure, avoiding drug-induced hypotension, overtransfusion, and anemia. During the postoperative period, visual acuity should be monitored regularly, and proper positioning of the patient's head is necessary.
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Affiliation(s)
- G A Schobel
- Department of Oral and Maxillofacial Surgery, University of Vienna, Austria
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48
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Hentschel F, Schmidbauer M, Detzner U, Blanz B, Schmidt MH. [Reversible changes in brain volume in anorexia nervosa]. Z Kinder Jugendpsychiatr 1995; 23:104-12. [PMID: 7785361] [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: 01/27/2023]
Abstract
Cranial computed tomography (CT) was performed in three different samples of young women with anorexia nervosa before and after treatment. The biggest changes in cerebrospinal fluid volume were observed in the supratentorial and extracerebral-subarachnoid area, with smaller changes in the ventricles. These changes, as assessed by different methods of volumetric and planimetric measurement, were statistically significant and were correlated with the changes in body weight. Two patient groups could be distinguished on the basis of the presence or absence of cerebellar pseudoatrophy in the initial CT, and these groups also showed differences in preclinical and clinical course.
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Affiliation(s)
- F Hentschel
- Abteilung für Neuroradiologie, Zentralinstitutes für Seelische Gesundheit, Mannheim
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49
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Overmeyer S, Blanz B, Schmidt MH, Rose F, Schmidbauer M. [School refusal--a catamnestic study on the diagnostic concept ov "school phobia" and "school anxiety"]. Z Kinder Jugendpsychiatr 1995; 23:35-43. [PMID: 7771122] [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: 01/27/2023]
Abstract
Twenty-six patients diagnosed with school refusal were examined 2.4 years after inpatient treatment. The long-term course of patients with "school phobia" (school refusal unrelated to school) and that of patients with "school anxiety" (school refusal related to school) were compared. In addition, an attempt was made to identify variables predictive of a good outcome. The mean age of the 12 patients with "school phobia" and the 14 patients with "school anxiety" was 12.7 years at the start of inpatient treatment. The assessment of psychiatric disturbances was based on structured interviews for parents and adolescents (MEI and MADEL, 1989) and the dimensional assessment scales of functioning for children and adolescents (MSBF). The variables assessed for predictive value were taken from the patients' records during inpatient treatment and from the hospital documentation system. There was no difference in outcome between the two syndrome groups. There was a tendency to less autonomy in the patients with "school phobia". Girls had a better outcome than boys, as did patients with less absence from school prior to inpatient treatment. Overall there was no difference in the outcome of "school phobia" and "school anxiety". Therefore a new classification should be considered.
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Affiliation(s)
- S Overmeyer
- Kinder- und Jugendpsychiatrische Klinik, Zentralinstitut für Seelische Gesundheit Mannheim
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50
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Kilcoyne ALD, Schmidbauer M, Koch A, Randall KJ, Feldhaus J. C 1s photoionization of H2CO and C2H4: An angle‐resolved photoelectron study. J Chem Phys 1993. [DOI: 10.1063/1.464765] [Citation(s) in RCA: 13] [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: 11/14/2022] Open
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