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Carl S, Will J, Madubuko N, Götz A, Przybilla T, Wu M, Raman N, Wirth J, Taccardi N, Zubiri BA, Haumann M, Wasserscheid P, Spiecker E. Structural Evolution of GaO x-Shell and Intermetallic Phases in Ga-Pt Supported Catalytically Active Liquid Metal Solutions. J Phys Chem Lett 2024; 15:4711-4720. [PMID: 38657124 DOI: 10.1021/acs.jpclett.3c03494] [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: 04/26/2024]
Abstract
We present a comprehensive scale-bridging characterization approach for supported catalytically active liquid metal solutions (SCALMS) which combines lab-based X-ray microscopy, nano X-ray computed tomography (nano-CT), and correlative analytical transmission electron microscopy. SCALMS catalysts consist of low-melting alloy particles and have demonstrated high catalytic activity, selectivity, and long-term stability in propane dehydrogenation (PDH). We established an identical-location nano-CT workflow which allows us to reveal site-specific changes of Ga-Pt SCALMS before and after PDH. These observations are complemented by analytical transmission electron microscopy investigations providing information on the structure, chemical composition, and phase distribution of individual SCALMS particles. Key findings of this combined microscopic approach include (i) structural evolution of the SCALMS particles' GaOx shell, (ii) Pt segregation toward the oxide shell leading to the formation of Ga-Pt intermetallic phases, and (iii) cracking of the oxide shell accompanied by the release of liquid Ga-Pt toward the porous support.
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Affiliation(s)
- S Carl
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - J Will
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - N Madubuko
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - A Götz
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - T Przybilla
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - M Wu
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - N Raman
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - J Wirth
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - N Taccardi
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - B Apeleo Zubiri
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
| | - M Haumann
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
- Research Centre for Synthesis and Catalysis, Department of Chemistry, University of Johannesburg, P.O. Box 524, 2006 Auckland Park, South Africa
| | - P Wasserscheid
- Lehrstuhl für Chemische Reaktionstechnik (CRT), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
- Helmholtz-Institute Erlangen-Nürnberg for Renewable Energy (IEK 11), Forschungszentrum Jülich GmbH, Egerlandstr. 3, 91058 Erlangen, Germany
| | - E Spiecker
- Institute of Micro- and Nanostructure Research (IMN) & Center for Nanoanalysis and Electron Microscopy (CENEM), Interdisciplinary Center for Nanostructured Films (IZNF), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Cauerstraße 3, 91058 Erlangen, Germany
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Hammer S, Nunes DW, Hammer M, Zeman F, Akers M, Götz A, Balla A, Doppler MC, Fellner C, Platz Batista da Silva N, Thurn S, Verloh N, Stroszczynski C, Wohlgemuth WA, Palm C, Uller W. Deep learning-based differentiation of peripheral high-flow and low-flow vascular malformations in T2-weighted short tau inversion recovery MRI. Clin Hemorheol Microcirc 2024:CH232071. [PMID: 38306026 DOI: 10.3233/ch-232071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
BACKGROUND Differentiation of high-flow from low-flow vascular malformations (VMs) is crucial for therapeutic management of this orphan disease. OBJECTIVE A convolutional neural network (CNN) was evaluated for differentiation of peripheral vascular malformations (VMs) on T2-weighted short tau inversion recovery (STIR) MRI. METHODS 527 MRIs (386 low-flow and 141 high-flow VMs) were randomly divided into training, validation and test set for this single-center study. 1) Results of the CNN's diagnostic performance were compared with that of two expert and four junior radiologists. 2) The influence of CNN's prediction on the radiologists' performance and diagnostic certainty was evaluated. 3) Junior radiologists' performance after self-training was compared with that of the CNN. RESULTS Compared with the expert radiologists the CNN achieved similar accuracy (92% vs. 97%, p = 0.11), sensitivity (80% vs. 93%, p = 0.16) and specificity (97% vs. 100%, p = 0.50). In comparison to the junior radiologists, the CNN had a higher specificity and accuracy (97% vs. 80%, p < 0.001; 92% vs. 77%, p < 0.001). CNN assistance had no significant influence on their diagnostic performance and certainty. After self-training, the junior radiologists' specificity and accuracy improved and were comparable to that of the CNN. CONCLUSIONS Diagnostic performance of the CNN for differentiating high-flow from low-flow VM was comparable to that of expert radiologists. CNN did not significantly improve the simulated daily practice of junior radiologists, self-training was more effective.
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Affiliation(s)
- Simone Hammer
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Danilo Weber Nunes
- Regensburg Medical Image Computing (ReMIC), Ostbayerische Technische Hochschule Regensburg (OTH Regensburg), Regensburg, Germany
| | - Michael Hammer
- Regensburg Medical Image Computing (ReMIC), Ostbayerische Technische Hochschule Regensburg (OTH Regensburg), Regensburg, Germany
| | - Florian Zeman
- Center for Clinical Trials, Medical Center University of Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Michael Akers
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Andrea Götz
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Annika Balla
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Michael Christian Doppler
- Department of Diagnostic and Interventional Radiology, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Claudia Fellner
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Natascha Platz Batista da Silva
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Sylvia Thurn
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Niklas Verloh
- Department of Diagnostic and Interventional Radiology, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Christian Stroszczynski
- Department of Radiology, Medical Center Universityof Regensburg, Faculty of Medicine, University of Regensburg, Regensburg, Germany
| | - Walter Alexander Wohlgemuth
- Department of Radiology, Medical Center University of Halle (Saale), Faculty of Medicine, University of Halle (Saale), Halle, Germany
| | - Christoph Palm
- Regensburg Medical Image Computing (ReMIC), Ostbayerische Technische Hochschule Regensburg (OTH Regensburg), Regensburg, Germany
- Regensburg Center of Biomedical Engineering (RCBE), OTH Regensburg and University of Regensburg, Regensburg, Germany
| | - Wibke Uller
- Department of Diagnostic and Interventional Radiology, Medical Center University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Wellinghausen N, Götz A, Rangel Vivar TE. Comparison of Treponema-specific immunoglobulin G (IgG) index with Treponema pallidum particle agglutination (TPPA) index for detection of intrathecal Treponema-specific antibody synthesis for serological diagnosis of neurosyphilis. GMS Infect Dis 2023; 11:Doc01. [PMID: 37868301 PMCID: PMC10585769 DOI: 10.3205/id000081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/24/2023]
Abstract
The determination of Treponema-specific intrathecal immunoglobulin synthesis with the Treponema pallidum particle agglutination (TPPA) index is a well-established method recommended in German guidelines for the diagnosis of neurosyphilis. However, the TPPA test is no longer available. The aim of this study was to evaluate whether the determination of a Treponema-specific immunoglobulin G (IgG) index can substitute the TPPA index. Serum and cerebrospinal fluid (CSF) samples from patients with confirmed (n=6) and probable (n=3) neurosyphilis as well as patients with adequately treated syphilis without neurosyphilis (n=4) were investigated. In addition to index calculation further CSF parameters were determined. The results of the Treponema IgG and the TPPA index were consistent in all patients with confirmed neurosyphilis and non-neurosyphilis patients. In two patients with probable neurosyphilis the IgG index appeared more plausible than the TPPA index when taking into account all available laboratory and clinical data of the patients. In conclusion, the determination of Treponema-specific intrathecal immunoglobulin synthesis with the IgG index appears to be a suitable alternative to the TPPA index.
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Götz A, Beggel S, Geist J. Dietary exposure to four sizes of spherical polystyrene, polylactide and silica nanoparticles does not affect mortality, behaviour, feeding and energy assimilation of Gammarus roeseli. Ecotoxicol Environ Saf 2022; 238:113581. [PMID: 35525113 DOI: 10.1016/j.ecoenv.2022.113581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 04/25/2022] [Accepted: 04/27/2022] [Indexed: 06/14/2023]
Abstract
The abundance and persistence of plastic nanoparticles in aquatic habitats are considered a threat to marine and freshwater biota. However, the risk assessment of plastic particles is complicated due to various factors that need to be considered, including composition, size and environmental abundance. This study investigated the behavioural response of a key river species, Gammarus roeseli, to dietary exposure of plain biodegradable and non-biodegradable plastic as well as to natural small micro- and nanoparticles. Mortality, feeding, swimming velocity and energy assimilation endpoints were examined by considering four particles sizes ranging from 30 to 1000 nm in two concentrations. Contrary to our expectations, neither decreasing size nor increasing abundance of each tested particle impacted any of the examined endpoints. Likewise, dietary exposition with biodegradable plain polylactide did not induce other or stronger effects than non-biodegradable plain polystyrene or natural silica micro- and nanoparticles, as all three particle types did not lead to adverse effects on G. roeseli. These findings also suggest that the functional role of Gammarus roeseli as a shredder is not impaired due to particle occurrence within the exposure range of this study.
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Affiliation(s)
- A Götz
- Aquatic Systems Biology Unit, TUM School of Life Sciences, Technical University of Munich, Mühlenweg 22, D-85354 Freising, Germany
| | - S Beggel
- Aquatic Systems Biology Unit, TUM School of Life Sciences, Technical University of Munich, Mühlenweg 22, D-85354 Freising, Germany
| | - J Geist
- Aquatic Systems Biology Unit, TUM School of Life Sciences, Technical University of Munich, Mühlenweg 22, D-85354 Freising, Germany.
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Wellinghausen N, Ivanova R, Deininger S, Götz A. Comparative study of a new commercial recombinant line assay and two immunoassays for detection of SARS-CoV-2 IgG antibodies in PCR-confirmed outpatients. J LAB MED 2020. [DOI: 10.1515/labmed-2020-0095] [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: 11/15/2022] Open
Abstract
Abstract
Objectives
Commercially available immunoassays have been developed for detection of antibodies against SARS-CoV-2. However, equivocal and discrepant results between different immunoassay can occur requiring further assessment by confirmatory tests.
Methods
We investigated the new commercial line assay recomLine SARS-CoV-2 IgG (Mikrogen, containing the antigens S1, receptor-binding domain of the spike protein, and nucleocapsid protein (NP) of SARS-CoV-2) within a collection of well characterized serum samples from COVID-19 outpatients (n=49) and SARS-CoV-2-PCR-positive asymptomatic contact persons (n=6) in comparison to two commercial immunoassays, the S1 antigen based Anti-SARS-CoV-2-ELISA IgG by Euroimmun and the NP based Elecsys® Anti-SARS-CoV-2 by Roche.
Results
The recomLine assay was positive in all samples which had an equivocal or positive result for SARS-CoV-2 antibodies in at least one of the two immunoassays. It showed high agreement with the overall results of the immunoassays (94.5% [Cohen’s kappa = 0.85] and 92.7% [Cohen’s kappa 0.81] to the ELISA by Euroimmun and the assay by Roche, respectively). In addition, high agreement of the reactivity to the specific antigens S1 and NP in the recomLine assays compared to the results of the S1 based ELISA and NP based Elecsys® assay, was found (90.9% [Cohen’s kappa 0.78] and 96.4% [Cohen’s kappa 0.91] for S1 and NP, respectively).
Conclusions
The new recomLine SARS-CoV-2 IgG assay may be used as an additional tool for investigation of equivocal or discrepant results of Anti-SARS-CoV-2 immunoassays and for antigen-specific detection of SARS-CoV-2 IgG antibodies.
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Schmidt I, Götz A, Schröder E. Multi‐Line‐Massenspektrometrie zur Steuerung industrieller chemischer Prozesse am Beispiel der Online‐Fermenteranalytik. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055291] [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: 11/07/2022]
Affiliation(s)
- I. Schmidt
- InProcess Instruments Gesellschaft für Prozessanalytik mbH Vertrieb Sophie-Germain-Str. 1 28201 Bremen Deutschland
| | - A. Götz
- InProcess Instruments Gesellschaft für Prozessanalytik mbH Vertrieb Sophie-Germain-Str. 1 28201 Bremen Deutschland
| | - E. Schröder
- InProcess Instruments Gesellschaft für Prozessanalytik mbH Vertrieb Sophie-Germain-Str. 1 28201 Bremen Deutschland
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Svitlica O, Schmidt I, Götz A, Schröder E. Massenspektrometrische Untersuchung der Denitrifikation unter erhöhter Salzbelastung in Umkehrosmose-Entsalzungsanlagen. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855245] [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: 11/11/2022]
Affiliation(s)
- O. Svitlica
- Niedersächsischer Landesbetrieb für Wasserwirtschaft, Küsten- und Naturschutz; Bürgermeister-Münchmeyer-Straße 6 27283 Verden Deutschland
| | - I. Schmidt
- InProcess Instruments GmbH; Sophie-Germain-Straße 1 28201 Bremen Deutschland
| | - A. Götz
- InProcess Instruments GmbH; Sophie-Germain-Straße 1 28201 Bremen Deutschland
| | - E. Schröder
- InProcess Instruments GmbH; Sophie-Germain-Straße 1 28201 Bremen Deutschland
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Ried M, Hnevkovsky S, Neu R, von Süßkind-Schwendi M, Götz A, Hamer OW, Schalke B, Hofmann HS. Impact of Surgical Evaluation of Additional Cine Magnetic Resonance Imaging for Advanced Thymoma with Infiltration of Adjacent Structures: The Thoracic Surgeon's View. Thorac Cardiovasc Surg 2016; 65:244-249. [PMID: 27177265 DOI: 10.1055/s-0036-1583765] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Background Preoperative radiological assessment is important for clarification of surgical operability for advanced thymic tumors. Objective was to determine the feasibility of magnetic resonance imaging (MRI) with cine sequences for evaluation of cardiovascular tumor invasion. Patients and Methods This prospective study included patients with advanced thymoma, who underwent surgical resection. All patients received preoperative computed tomography (CT) scan and cine MRI. Results Tumor infiltration was surgically confirmed in the pericardium (n = 12), myocardium (n = 1), superior caval vein (SCV; n = 3), and aorta (n = 2). A macroscopic complete resection was possible in 10 patients, whereas 2 patients with aortic or myocardial tumor invasion had R2 resection. The positive predictive value (PPV) was 50% for cine MRI compared with 0% for CT scan regarding myocardial tumor infiltration. The PPV for tumor infiltration of the aorta was 50%, with a higher sensitivity for the CT scan (100 vs. 50%). Infiltration of the SCV could be detected slightly better with cine MRI (PPV 75 vs. 66.7%). Conclusion Cine MRI seems to improve the accuracy of preoperative staging of advanced thymoma regarding infiltration of cardiovascular structures and supports the surgical approach.
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Affiliation(s)
- Michael Ried
- Department of Thoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Stefanie Hnevkovsky
- Department of Thoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Reiner Neu
- Department of Thoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
| | | | - Andrea Götz
- Department of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - Okka W Hamer
- Department of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - Berthold Schalke
- Department of Neurology, University of Regensburg at the District Medical Center, Regensburg, Germany
| | - Hans-Stefan Hofmann
- Department of Thoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
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Ried M, Marx A, Götz A, Hamer O, Schalke B, Hofmann HS. State of the art: diagnostic tools and innovative therapies for treatment of advanced thymoma and thymic carcinoma. Eur J Cardiothorac Surg 2015; 49:1545-52. [PMID: 26670806 DOI: 10.1093/ejcts/ezv426] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 11/09/2015] [Indexed: 12/30/2022] Open
Abstract
In this review article, state-of-the-art diagnostic tools and innovative treatments of thymoma and thymic carcinoma (TC) are described with special respect to advanced tumour stages. Complete surgical resection (R0) remains the standard therapeutic approach for almost all a priori resectable mediastinal tumours as defined by preoperative standard computed tomography (CT). If lymphoma or germ-cell tumours are differential diagnostic considerations, biopsy may be indicated. Resection status is the most important prognostic factor in thymoma and TC, followed by tumour stage. Advanced (Masaoka-Koga stage III and IVa) tumours require interdisciplinary therapy decisions based on distinctive findings of preoperative CT scan and ancillary investigations [magnetic resonance imaging (MRI)] to select cases for primary surgery or neoadjuvant strategies with optional secondary resection. In neoadjuvant settings, octreotide scans and histological evaluation of pretherapeutic needle biopsies may help to choose between somatostatin agonist/prednisolone regimens and neoadjuvant chemotherapy as first-line treatment. Finally, a multimodality treatment regime is recommended for advanced and unresectable thymic tumours. In conclusion, advanced stage thymoma and TC should preferably be treated in experienced centres in order to provide all modern diagnostic tools (imaging, histology) and innovative therapy techniques. Systemic and local (hyperthermic intrathoracic chemotherapy) medical treatments together with extended surgical resections have increased the therapeutic options in patients with advanced or recurrent thymoma and TC.
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Affiliation(s)
- Michael Ried
- Department of Thoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Alexander Marx
- Institute for Pathology, University Medical Centre Mannheim, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Andrea Götz
- Department of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - Okka Hamer
- Department of Radiology, University Medical Center Regensburg, Regensburg, Germany
| | - Berthold Schalke
- Department of Neurology, University Regensburg at the District Medical Center, Regensburg, Germany
| | - Hans-Stefan Hofmann
- Department of Thoracic Surgery, University Medical Center Regensburg, Regensburg, Germany
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Götz A, Heiss P, Fellner C, Ried M, Schalke B, Hofmann HS, Stroszczynski C, Hamer OW. EKG-getriggerte CINE-Sequenzen zur Detektion einer frühen Umgebungsinfiltration durch Thymome. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1373422] [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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Heiß P, Götz A, Brand M, Brodoefel H, Müller-Wille R, Hamer O, Stroszczynski C, Heiß P. Akute nekrotisierende Pankreatitis: Laborchemische, klinische und bildgebende Befunde als Prädiktoren des Verlaufes. ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372805] [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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Schulz-Mirbach T, Götz A, Griesshaber E, Plath M, Schmahl W. Texture and nano-scale internal microstructure of otoliths in the Atlantic molly, Poecilia mexicana: A high-resolution EBSD study. Micron 2013; 51:60-9. [DOI: 10.1016/j.micron.2013.07.001] [Citation(s) in RCA: 4] [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] [Received: 02/26/2013] [Revised: 06/18/2013] [Accepted: 07/02/2013] [Indexed: 11/15/2022]
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Götz A, Brand M, Hamer OW, Stroszczynski C, Heiss P. Akute nekrotisierende Pankreatitis: Computertomografische, klinische und laborchemische Befunde als Prädiktoren für die Infektion (peri-)pankreatischer Nekrosen. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346388] [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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Götz A, Stroszczynski C, Müller-Wille R. Unklarer Exophthalmus. Radiologe 2012; 52:656-60. [DOI: 10.1007/s00117-012-2320-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hoffstetter P, Schleder S, Jung EM, Götz A, Uller W, Müller-Wille R, Wiggermann P, Agha A, Stroszczynski C, Schreyer AG. Konventionelle Abdomenübersichtsaufnahmen - welchen klinischen Nutzen hat die Aufnahme in Rückenlage. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Platz Batista da Silva N, Götz A, Gössmann H, Wiggermann P, Stroszczynski C, Schreyer AG. Klinische Wertigkeit der radiologischen Darstellung des abführenden Schenkels vor Stomarückverlagerung. ROFO-FORTSCHR RONTG 2012. [DOI: 10.1055/s-0032-1311278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Hoffstetter P, Schleder S, Jung EM, Götz A, Uller W, Müller-Wille R, Wiggermann P, Agha A, Stroszczynski C, Schreyer AG. [Plain abdominal radiograph - is there any additional clinical value based on the supine projection?]. Dtsch Med Wochenschr 2011; 136:2589-93. [PMID: 22160951 DOI: 10.1055/s-0031-1292851] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
BACKGROUND To assess the diagnostic value of an additionally acquired plain abdominal radiograph in supine position. MATERIALS AND METHODS Two experienced radiologists evaluated retrospectively 2148 consecutive patients having plain abdominal radiographs acquired in a tertiary care center. There were 1385 patients having an erect view and 763 patients with a left lateral decubitus view. All patients had a second examination in supine position. First the radiographs in erect or decubitus view were evaluated regarding the presence and details of pathological changes. After 4 weeks all radiographs including the supine view were evaluated again. Next to pathological changes the additional value of the supine projection was assessed. The results were compared and the additional diagnostic value using the supine view was noted. RESULTS We evaluated 2148 patients having a plain abdominal radiograph (1325 men, 823 women, mean 58.9 years, range 15-96 years). The average age within the group acquired with left decubitus view was 61.1 years, while patients having an erect view had a mean age of 57.0 years. For the first evaluation we found pathological changes in 10.5% (decubitus view: 13.1%, erect view 9.5%; p = 0.01). The most frequent diagnosis was ileus (7.7%) followed by abdominal free air (2.4%). The results were confirmed during the second reading in 99.2%. In 3.5% (decubitus view 5.8%, erect view 2.2%) more anatomical structures were depicted considering the supine projection and the decubitus/erect projections. The anatomical information was in no case relevant for the diagnosis. CONCLUSION Having the information of an supine view additionally to an decubitus/erect view increases the depiction of anatomical structures up to 5.8%. Nevertheless there was no additional diagnostic relevant information based on the supine view.
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Affiliation(s)
- P Hoffstetter
- Institut für Röntgendiagnostik, Universitätsklinikum Regensburg, Bad Abbach.
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18
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Schmahl WW, Griesshaber E, Kelm K, Götz A, Mader W. Electron microscopy in biomineral research. Acta Crystallogr A 2010. [DOI: 10.1107/s0108767310098533] [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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19
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Crecelius A, Götz A, Arzberger T, Fröhlich T, Arnold GJ, Ferrer I, Kretzschmar HA. Assessing quantitative post-mortem changes in the gray matter of the human frontal cortex proteome by 2-D DIGE. Proteomics 2008; 8:1276-91. [PMID: 18283663 DOI: 10.1002/pmic.200700728] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The number of proteomics studies concerning human brain samples has been increasing in recent years, in particular in the discovery of biomarkers for neurological diseases. The human brain samples are obtained from brain banks, which are interested in providing high quality human nervous tissue. In order to provide brain banks as well as scientists working in the proteomics field with measures for tissue quality, the critical factors after death, the effect of post-mortem interval (PMI) and storage temperature on the human brain proteome were investigated. This study was focused on the gray matter of the frontal cortex. The PMI was artificially prolonged from the time of autopsy (2 h after death) by storing samples at 4 degrees C or room temperature over 18, 24, and 48 h. The samples were analyzed by 2-D DIGE using a pH 4-7 gradient, revealing a time course of quantitative protein changes. The degradation of three proteins, peroxiredoxin-1, stathmin, and glial fibrillary acidic protein were further confirmed by Western-blot analysis. Proteins vulnerable to PMI were analyzed by the 2-D DIGE analysis of cortex samples from three donors, and were derived from a variety of functional groups, including metabolic, structural, stress response, antioxidants, synaptosomal, and neuronal proteins.
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Affiliation(s)
- Anna Crecelius
- Laboratory of Molecular Neuropathology, Centre of Neuropathology and Prion Research, LMU, Munich, Germany
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20
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Isohanni P, Götz A, Marjavaara S, Paetau A, Herva R, Suomalainen A, Pihko H. M.P.1.10 Mitochondrial myopathy caused by thymidine kinase 2 (TK2) mutation mimics congenital muscular dystrophy. Neuromuscul Disord 2007. [DOI: 10.1016/j.nmd.2007.06.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Schmid-Ott G, Künsebeck HW, Jecht E, Shimshoni R, Lazaroff I, Schallmayer S, Calliess IT, Malewski P, Lamprecht F, Götz A. Stigmatization experience, coping and sense of coherence in vitiligo patients. J Eur Acad Dermatol Venereol 2007; 21:456-61. [PMID: 17373970 DOI: 10.1111/j.1468-3083.2006.01897.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 01/03/2023]
Abstract
OBJECTIVE This study examines the extent of stigmatization experienced by vitiligo patients considering the visibility of the lesions. METHODS 363 vitiligo patients were assessed using the Experience with Skin Complaints (QES), Adjustment to Chronic Skin Disorders (ASC), and Sense of Coherence (SOC) questionnaires. Out of the total patients group two representative samples with 52 patients each were identified comparable for age, gender, and the duration of the skin disease, the first with visible and the second with invisible lesions. RESULTS Data indicate a significant negative correlation between the QES dimensions, except for 'Composure', and between coping scales with sense of coherence withstanding. The 'visible lesions' group scored higher compared to the 'invisible lesions' group on the two QES scales 'Self-Esteem' and 'Refusal', i.e., patients with visible lesions experienced a higher level of stigmatization. CONCLUSION This study provides new information which supports the notion that the stigmatization experience of vitiligo patients is psychologically relevant.
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Affiliation(s)
- G Schmid-Ott
- Department of Psychosomatic Medicine, Hannover Medical School, Hannover, Germany.
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22
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Lam T, Götz A, Franceschini F, Hauser N. GumTree—a Java based GUI framework for beamline experiments. Journal of Neutron Research 2006. [DOI: 10.1080/10238160600766336] [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] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Götz A, Kellner H. [Muscle weakness and Gottron's sign]. Z Rheumatol 2003; 62:178. [PMID: 12721706 DOI: 10.1007/s00393-003-0482-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- A Götz
- Medizinische Poliklinik, Klinikum der Universität-Innenstadt, Pettenkoferstr. 8a, 80336 Munich, Germany.
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24
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Russow R, Kupka HJ, Götz A, Apelt B. A new approach to determining the content and 15N abundance of total dissolved nitrogen in aqueous samples: TOC analyser-QMS coupling. Isotopes Environ Health Stud 2002; 38:215-225. [PMID: 12725425 DOI: 10.1080/10256010208033267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The standard method for determining the 15N abundance of total dissolved nitrogen (TDN) in aqueous samples (e.g., soil leachate, sewage, urine) is currently Kjeldahl digestion followed by steam distillation or diffusion to isolate the ammonium, and then 15N measurement using IRMS. However, this technique is both time-consuming and laborious. One way of overcoming these disadvantages could be to couple a TOC analyser to determine the TDN with a sufficient quadrupole MS to determine the 15N abundance. The high TOC analyser (Elementar Analysensysteme Hanau, Germany), which catalytically oxidises the sample's total nitrogen with a high, constant yield to nitrogen monoxide (NO), appeared particularly suitable. The quadrupole-MS ESD 100 (InProcess Instruments Bremen, Germany) proved to be a suitable mass spectrometer for the 15N determination of NO. This combination of instruments was found to provide a workable method in numerous measurements of standard and actual samples. The detection limit concerning the N amount required per analysis is 2 microg, corresponding to an N concentration of 0.7 mg/l in a maximum sample volume of 3ml. Depending on the N concentration, 15N abundances starting from 0.5 at.% can be measured with the required precision of better than 3% (simple standard deviation). For example, measuring the abundance of 0.5 at.% requires about 50 microg N, whereas for 1 at.% or more only about 5 microg N is needed per analysis.
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Affiliation(s)
- R Russow
- UFZ Centre for Environmental Research Leipzig-Halle, Germany.
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25
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Block M, Stange-Budumlu O, Mair H, Schütz A, Götz A. [Only for limited indications. Biventricular pacemaker improves severe heart failure]. MMW Fortschr Med 2001; 143:45-7. [PMID: 11481917] [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: 02/20/2023]
Abstract
In patients with congestive heart disease in whom left ventricular dilatation is associated with severely disordered contraction due to delayed ventricular conduction, a new form of treatment not requiring drugs is currently becoming established--biventricular pacing. Via an implanted electrode, biventricular stimulation accelerates conduction in the left ventricle and resynchronizes its contraction. Patients being considered for such therapy must have stable stage III disease (NYHA classification) under optimal medication, and a left bundle branch block with a QRS of at least 150 ms. Definitive recommendations with regard to indications will be possible only when current randomized mortality studies have been concluded.
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Affiliation(s)
- M Block
- Abt. für Kardiologie, Stiftsklinik Augustinum, München
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26
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Brötz D, Weller M, Küker W, Dichgans J, Götz A. Mechanische physiotherapeutische Diagnostik und Therapie bei Patienten mit lumbalen Bandscheibenvorfällen. Akt Neurol 2001. [DOI: 10.1055/s-2001-11301] [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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27
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Abstract
Stroke patients may exhibit the peculiar behavior of actively pushing away from the nonhemiparetic side, leading to lateral postural imbalance and a tendency to fall towards the paralyzed side. These patients use the nonparetic extremities to stem actively against attempts of passive correction towards upright orientation. This phenomenon has been called the "pusher syndrome". Recent findings disclose that the deficit leading to contraversive pushing is an altered perception of the body's orientation in relation to gravity. Pusher patients experience their body as upright when they are actually tilted to the nonhemiparetic side. In contrast, processing of visual and vestibular inputs for the determination of visual vertical was undisturbed. The results argue for a separate pathway in humans for sensing gravity apart from that for perception of the visual world. This second graviceptive system decisively contributes to our control of upright body posture. The present article describes this still largely unknown neurological disease. The clinical examination of contraversive pushing, its underlying disturbance, lesion location, and approaches for therapy are considered.
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Affiliation(s)
- H O Karnath
- Neurologische Universitätsklinik, Abteilungen Kognitive und Allgemeine Neurologie, Hoppe-Seyler-Str. 3, 72076 Tübingen.
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28
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Smalla K, Heuer H, Götz A, Niemeyer D, Krögerrecklenfort E, Tietze E. Exogenous isolation of antibiotic resistance plasmids from piggery manure slurries reveals a high prevalence and diversity of IncQ-like plasmids. Appl Environ Microbiol 2000; 66:4854-62. [PMID: 11055935 PMCID: PMC92391 DOI: 10.1128/aem.66.11.4854-4862.2000] [Citation(s) in RCA: 142] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2000] [Accepted: 08/17/2000] [Indexed: 11/20/2022] Open
Abstract
Antibiotic resistance plasmids were exogenously isolated in biparental matings with piggery manure bacteria as plasmid donors in Escherichia coli CV601 and Pseudomonas putida UWC1 recipients. Surprisingly, IncQ-like plasmids were detected by dot blot hybridization with an IncQ oriV probe in several P. putida UWC1 transconjugants. The capture of IncQ-like plasmids in biparental matings indicates not only their high prevalence in manure slurries but also the presence of efficiently mobilizing plasmids. In order to elucidate unusual hybridization data (weak or no hybridization with IncQ repB or IncQ oriT probes) four IncQ-like plasmids (pIE1107, pIE1115, pIE1120, and pIE1130), each representing a different EcoRV restriction pattern, were selected for a more thorough plasmid characterization after transfer into E. coli K-12 strain DH5alpha by transformation. The characterization of the IncQ-like plasmids revealed an astonishingly high diversity with regard to phenotypic and genotypic properties. Four different multiple antibiotic resistance patterns were found to be conferred by the IncQ-like plasmids. The plasmids could be mobilized by the RP4 derivative pTH10 into Acinetobacter sp., Ralstonia eutropha, Agrobacterium tumefaciens, and P. putida, but they showed diverse patterns of stability under nonselective growth conditions in different host backgrounds. Incompatibility testing and PCR analysis clearly revealed at least two different types of IncQ-like plasmids. PCR amplification of total DNA extracted directly from different manure samples and other environments indicated the prevalence of both types of IncQ plasmids in manure, sewage, and farm soil. These findings suggest that IncQ plasmids play an important role in disseminating antibiotic resistance genes.
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Affiliation(s)
- K Smalla
- Biologische Bundesanstalt für Land- und Forstwirtschaft, Institut für Pflanzenvirologie, Mikrobiologie und biologische Sicherheit, D-38104 Braunschweig, Germany.
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29
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Abstract
Tumor necrosis factor (TNF) exists in two bioactive forms, the membrane integrated form and the proteolytically derived soluble cytokine. Both forms of TNF are involved in a variety of different physiological and pathophysiological situations. Here we analyzed different human and mouse TNF-specific reagents for their ability to determine the expression of membrane-expressed TNF. The data prove some antibodies to be very useful for the analysis of transmembrane TNF expression because these antibodies distinguish between the transmembrane form of TNF and soluble TNF bound to cellular TNF receptors. In addition, we found that recombinant human TNF receptor fusion proteins are advantageous tools to analyze both human and mouse transmembrane TNF expression.
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Affiliation(s)
- J Gerspach
- Institute of Cell Biology and Immunology, University of Stuttgart, 70569 Stuttgart, Germany
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30
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Oetzel C, Jonuleit T, Götz A, van der Kuip H, Michels H, Duyster J, Hallek M, Aulitzky WE. The tyrosine kinase inhibitor CGP 57148 (ST1 571) induces apoptosis in BCR-ABL-positive cells by down-regulating BCL-X. Clin Cancer Res 2000; 6:1958-68. [PMID: 10815921] [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: 02/16/2023]
Abstract
CGP 57148 is a potent inhibitor of the ABL protein tyrosine kinase and a promising new compound for the treatment of a variety of BCR-ABL-positive leukemias. We used this enzyme inhibitor to characterize the biological effects of BCR-ABL in primary cells and two growth factor-dependent BCR-ABL-transfected cell lines. The effect of CGP 57148 on primary cells is dependent on the stage of differentiation. The growth of maturing chronic myeloid leukemia cells is independent of BCR-ABL in the presence of growth factors. However, the proliferation of leukemic immature cobblestone-forming area cells is almost completely blocked after the inhibition of the BCR-ABL kinase. In the BCR-ABL-transfected cell lines, M07/ p210 and Ba/F3/p185, CGP 57148 induces apoptosis by releasing cytochrome c, activating caspase 3, and cleavage of PARP. No alteration of the expression level of the apoptosis regulator BCL-2 was observed. In contrast, BCL-X was down-regulated after exposure to CGP 57148. Inhibitors of signal transduction proteins such as PI-3 kinase, mitogen-activated protein/extracellular signal-regulated kinase kinase, and Janus-activated kinase 2 pathways were not capable of a comparable down-regulation of BCL-X. The Fas/Fas ligand system was not involved either in the induction of apoptosis by CGP 57148. We conclude that the inhibition of the BCR-ABL kinase by CGP 57148 (a) preferentially inhibits the growth of immature leukemic precursor cells, (b) efficiently reverts the antiapoptotic effects of BCR-ABL by down-regulation of BCL-X, and (c) is more effective than the inhibition of the downstream signal transduction pathways of PI-3 kinase, mitogen-activated protein/extracellular signal-regulated kinase kinase, and Janus-activated kinase 2.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Benzamides
- Caspase 3
- Caspases/drug effects
- Caspases/metabolism
- Cell Count/drug effects
- Cell Division/drug effects
- Chromones/pharmacology
- Cytochrome c Group/drug effects
- Cytochrome c Group/metabolism
- Cytosol/drug effects
- Cytosol/metabolism
- Down-Regulation
- Enzyme Activation/drug effects
- Enzyme Inhibitors/pharmacology
- Fas Ligand Protein
- Flavonoids/pharmacology
- Fusion Proteins, bcr-abl/drug effects
- Fusion Proteins, bcr-abl/metabolism
- Humans
- Imatinib Mesylate
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/drug therapy
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/enzymology
- Leukemia, Myelogenous, Chronic, BCR-ABL Positive/pathology
- Membrane Glycoproteins/metabolism
- Morpholines/pharmacology
- Piperazines/pharmacology
- Poly(ADP-ribose) Polymerases/metabolism
- Protein Binding
- Protein-Tyrosine Kinases/antagonists & inhibitors
- Proto-Oncogene Proteins c-bcl-2/drug effects
- Proto-Oncogene Proteins c-bcl-2/metabolism
- Pyrimidines/pharmacology
- Tumor Cells, Cultured
- Tyrphostins/pharmacology
- bcl-X Protein
- fas Receptor/metabolism
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Affiliation(s)
- C Oetzel
- 2nd Department of Internal Medicine for Oncology, Hematology and Immunology, Robert Bosch Hospital, Stuttgart, Germany
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31
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Orsó E, Broccardo C, Kaminski WE, Böttcher A, Liebisch G, Drobnik W, Götz A, Chambenoit O, Diederich W, Langmann T, Spruss T, Luciani MF, Rothe G, Lackner KJ, Chimini G, Schmitz G. Transport of lipids from golgi to plasma membrane is defective in tangier disease patients and Abc1-deficient mice. Nat Genet 2000; 24:192-6. [PMID: 10655069 DOI: 10.1038/72869] [Citation(s) in RCA: 368] [Impact Index Per Article: 15.3] [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: 12/26/2022]
Abstract
Mutations in the gene encoding ATP-binding cassette transporter 1 ( ABC1) have been reported in Tangier disease (TD), an autosomal recessive disorder that is characterized by almost complete absence of plasma high-density lipoprotein (HDL), deposition of cholesteryl esters in the reticulo-endothelial system (RES) and aberrant cellular lipid trafficking. We demonstrate here that mice with a targeted inactivation of Abc1 display morphologic abnormalities and perturbations in their lipoprotein metabolism concordant with TD. ABC1 is expressed on the plasma membrane and the Golgi complex, mediates apo-AI associated export of cholesterol and phospholipids from the cell, and is regulated by cholesterol flux. Structural and functional abnormalities in caveolar processing and the trans-Golgi secretory pathway of cells lacking functional ABC1 indicate that lipid export processes involving vesicular budding between the Golgi and the plasma membrane are severely disturbed.
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Affiliation(s)
- E Orsó
- Institute for Clinical Chemistry and Laboratory Medicine, University of Regensburg, Regensburg, Germany
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32
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Gödje O, Lamm P, Adelhard K, Schütz A, Kilger E, Götz A, Lange T, Mair H, Reichart B. Surgical versus medical care for postoperative cardiac surgical patients at the general ward. Eur J Cardiothorac Surg 1999; 16:222-7. [PMID: 10485425 DOI: 10.1016/s1010-7940(99)00203-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
OBJECTIVES To shorten hospital stay after cardiac surgery, several risk factors have been defined to identify patients who can be discharged early. These risk factors are dependant on the patient; no studies exist on the influence of the treating physician himself on postoperative patient stay. METHODS In a university affiliated cardiac surgical clinic we investigated patients who were postoperatively treated either on medical wards with no cardiac surgeon's presence or on a cardiac surgical ward; at both types of wards physicians had several years experience with cardiac surgical patients. Taking several risk factors for postoperative morbidity into account, postoperative length of stay and incidence of wound healing complications have been compared. RESULTS Within a 3-month period, 84 patients were treated at the cardiac surgical ward, 102 patients at the medical wards. Risk factors for postoperative morbidity were present in 87% of patients, statistically independent of postoperative wards. Although demographic data and median ICU-stay of both patient groups was comparable, the median post-ICU stay was 9 days at the surgical and 13 days at the medical wards (P < 0.0001). Incidence of wound healing complication was higher (19.6%) at the medical wards than at the surgical ward (10.7%), without reaching statistical significance. CONCLUSION As patients at the respective wards were statistically not different, the difference in post-ICU stay, infection and costs must depend on the treating physicians. As a consequence, postoperative care for cardiac surgical patients in all cases should include direct cardiac surgical participation.
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Affiliation(s)
- O Gödje
- Department of Cardiac Surgery of the Ludwig-Maximilians-University of Munich at Augustinum, Germany.
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Abstract
Porokeratos of Mibelli is a rare inherited disorder of epidermal keratinization, whose pathogenesis is not fully understood. The common clinical feature is a erythematous plaque surrounded by a hyperkeratotic border. The histopathologic hallmark is a parakeratotic cornoid lamella. An unusual case of porokeratosis gigantea, a morphological variant of classical porokeratosis of Mibelli, is reported. The pathogenesis, taking in account especially the clonal hypothesis and premalignant nature of porokeratosis, is discussed.
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Affiliation(s)
- A Götz
- Dermatologische Universitätsklinik Regensburg
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Götz A, Pukall R, Smit E, Tietze E, Prager R, Tschäpe H, van Elsas JD, Smalla K. Detection and characterization of broad-host-range plasmids in environmental bacteria by PCR. Appl Environ Microbiol 1996; 62:2621-8. [PMID: 8779598 PMCID: PMC168041 DOI: 10.1128/aem.62.7.2621-2628.1996] [Citation(s) in RCA: 203] [Impact Index Per Article: 7.3] [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: 02/02/2023] Open
Abstract
Primer systems for PCR amplification of different replicon-specific DNA regions were designed on the basis of published sequences for plasmids belonging to the incompatibility (Inc) groups IncP, IncN, IncW, and IncQ. The specificities of these primer systems for the respective Inc groups were tested with a collection of reference plasmids belonging to 21 different Inc groups. Almost all primer systems were found to be highly specific for the reference plasmid for which they were designed. In addition, the primers were tested with plasmids which had previously been grouped by traditional incompatibility testing to the IncN, IncW, IncP, or IncQ group. All IncQ plasmids gave PCR products with the IncQ primer systems tested. However, PCR products were obtained for only some of the IncN, IncP, and IncW group plasmids. Dot blot and Southern blot analyses of the plasmids revealed that PCR-negative plasmids also failed to hybridize with probes derived from the reference plasmids. The results indicated that plasmids assigned to the same Inc group by traditional methods might be partially or completely different from their respective reference plasmids at the DNA level. With a few exceptions, all plasmids related to the reference plasmid at the DNA level also reacted with the primer systems tested. PCR amplification of total DNA extracted directly from different soil and manure slurry samples revealed the prevalence of IncQ- and IncP-specific sequences in several of these samples. In contrast, IncN- and IncW-specific sequences were detected mainly in DNA obtained from manure slurries.
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Affiliation(s)
- A Götz
- Biologische Bundesanstalt für Land- und Forstwirtschaft, Braunschweig, Germany
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35
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Stolz W, Götz A, Thomas P, Ruzicka T, Süss R, Landthaler M, Mahnel H, Czerny CP. Characteristic but unfamiliar--the cowpox infection, transmitted by a domestic cat. Dermatology 1996; 193:140-3. [PMID: 8884153 DOI: 10.1159/000246231] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 02/02/2023] Open
Abstract
An 11-year-old girl had been suffering from 2 recently developed reddish ulcerated nodules on the right side of her neck and, concomitantly, from a very hard swelling as well as from painless lymphadenopathy. Subsequently, thick black eschars appeared on the surface of the ulcers. Using the negative staining technique, an orthopox virus infection could be identified by electron microscopy. The patient's characteristic history as well as her close contact with a cat frequently hunting nice indicated the diagnosis of a cowpox infection, which was unequivocally confirmed by identification of both the viral culture and specific antibodies in the serum of the patient.
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Affiliation(s)
- W Stolz
- Department of Dermatology, University of Regensburg, Germany
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36
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Affiliation(s)
- A Götz
- Department of Dermatology, University of Regensburg, Germany
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37
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Lamberty A, Lapitajs G, Van Nevel L, Götz A, Moody JR, Erdmann DE, De Bievre P. The IRMM--International Measurement Evaluation Program (IMEP). IMEP-3--trace elements in synthetic and natural water. Biol Trace Elem Res 1994; 43-45:571-83. [PMID: 7710875 DOI: 10.1007/bf02917360] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The aim of the IRMM--International Measurement Evaluation Program (IMEP) is to test out a possible realization of international measurement comparability for field laboratories through traceability of their measurements to the SI Unit for amount of substance: the mole. In IMEP-3, 10 different trace elements, B, Ca, Cd, Cu, Fe, K, Li, Pb, Rb, and Zn, were determined in a synthetic and a natural water by participating laboratories using their routine methods and graphically compared (in coded form) to certified values, established by IRMM and NIST using an isotope-specific method (Isotope Dilution Mass Spectrometry, Neutron Activation Analysis). The number of participants was 70; 64 laboratories have reported results. The results show a spread of more than 50% asymmetrically around the certified value. The Youden graphs allow evaluation of the overall performance of the laboratories in the IMEP-3 round.
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Affiliation(s)
- A Lamberty
- Institute for Reference Materials and Measurements (IRMM), Geel, Belgium
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Götz A, Weissenbacher ER, Walker S, Wachter I, Schulze K, Vogel S. Untersuchungen zur Morbidität von Harnwegsinfektionen. Arch Gynecol Obstet 1993. [DOI: 10.1007/bf02266136] [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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Waldner H, Vollmar B, Conzen P, Götz A, Lehnert P, Fink E, Brendel W, Schweiberer L. [Enzyme liberation and activation of the kallikrein-kinin system in experimental pancreatitis. Studies of portal vein blood, pancreatic lymph and peritoneal effusion]. Langenbecks Arch Chir 1993; 378:154-9. [PMID: 8326807 DOI: 10.1007/bf00184465] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The clinical course of acute pancreatitis is strongly influenced by secondary cardiac, pulmonary and renal damage. The aim of the present study was to gather information about the compartment promoting the systemic damage. Therefore the activity of lipase, phospholipase A and plasma pro-kallikrein and the concentration of tissue kallikrein and kininogen were measured in portal venous blood, pancreatic lymph and peritoneal exudate. Anaesthetized pigs were subjected to fluid resuscitation to keep systemic haemodynamic parameters constant. The pancreas was isolated in situ. The pigs were randomly assigned to a control group (n = 9) or one of the two pancreatitis groups (n = 10 each). Pancreatitis was induced by i.a. infusion of free fatty acid (FFS) or retrograde infusion of 5% sodium taurocholate intraductally (NaT). In both pancreatitis groups the activity of lipase and phospholipase A increased. The most pronounced changes were seen in the peritoneal exudate (phospholipase A activity 40 min after induction: control 10.0 U/l, NaT 72.2 U/l). In both pancreatitis groups there was evidence for activation of the tissue kallikrein kinin system in the form of an increase in the kallikrein concentration and a decrease in the kininogen concentration. Again the changes were most pronounced in the peritoneal exudate (tissue kallikrein 40 min after induction: control 14.7 ng/ml, NaT 452 ng/ml).
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Affiliation(s)
- H Waldner
- Chirurgische Klinik und Poliklinik des Klinikums Innenstadt, Ludwig-Maximilians-Universität München
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Eagles J, Fairweather-Tait SJ, Portwood DE, Self R, Götz A, Heumann KG. Comparison of fast atom bombardment mass spectrometry and thermal ionization quadrupole mass spectrometry for the measurement of zinc absorption in human nutrition studies. Anal Chem 1989; 61:1023-5. [PMID: 2729598 DOI: 10.1021/ac00184a021] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A method is described for the measurement of apparent zinc absorption in human nutrition studies. An enriched source of the stable isotope 67Zn was given to adult subjects together with a wheat cereal and the unabsorbed 67Zn measured in the feces. After drying, subsamples of the homogenized fecal material were ashed at 480 degrees C, purified for analysis by ion exchange chromatography, and the 64Zn/67Zn ratios determined by both fast atom bombardment mass spectrometry and thermal ionization quadrupole mass spectrometry. Good agreement was found between the two sets of results with mean precisions of approximately 0.5% for both techniques.
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Götz A, Weissenbacher ER, Gutschow K, Wachter I, Schneider A. Pharmacokinetics of ceftriaxone in serum and in gynecological tissues. Acta Eur Fertil 1987; 18:127-8. [PMID: 3630575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The suitability of Ceftriaxone in gynecologic infections has been investigated in twenty-two patients. The long half life of Ceftriaxone seems to demonstrate its suitability for an effective preoperative prophylaxis in gynecology.
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Weissenbacher ER, Wachter I, Gutschow K, Schneider A, Adam D, Zöllner H, Götz A. Zur Pharmakokinetik von Ticarcillin/Clavulansäure in gynäkologischen Organen sowie im Placentagewebe unter Berücksichtigung der In-vitro-Perfusion. Arch Gynecol Obstet 1987. [DOI: 10.1007/bf01783389] [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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Gutschow K, Weissenbacher ER, Wachter I, Schneider A, Adam D, Götz A. Ticarcillin/clavulanic acid treatment of gynecological infections. Acta Eur Fertil 1987; 18:123-4. [PMID: 3630573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Forty patients have been treated with a Ticarcillin/Clavulanic acid combination. This drug has proven to be effective in the treatment of gynecological soft tissues and wound infections.
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Regli J, Huber M, Vollrath T, Meier JM, Götz A, Schmid M, Maranta E. [Value of abdominal sonography and laparoscopy in the diagnosis of primary hepatocellular cancer]. Schweiz Rundsch Med Prax 1985; 74:1109-11. [PMID: 2997897] [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: 01/03/2023]
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Borruto F, Götz A. [Changes in the fetal cardio-vascular system in cases of intra-uterine growth retardation ( a measurement of the cardiac volume and the cardiac flow by the Doppler method)]. Geburtshilfe Frauenheilkd 1983; 43:76-7. [PMID: 6551296 DOI: 10.1055/s-2008-1037061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
In 28 patients with suspected intra-uterine growth retardation during the last trimester of pregnancy the cardiac volume measurements and the flow measurements by the Doppler method showed diminished values. The suspicion of growth retardation was later confirmed by the birth weight. Changes of the cardio-vascular system in the foetus therefore are helpful in the diagnosis of intra-uterine growth retardation. Other parameters such as cardio-tocography, L/S ratio and hormone determinations are also used in the diagnosis.
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Albrich W, Weichenmeier J, Götz A, Walz C, Blümel G. [Microsurgical anastomosis of the rat uterus using fibrin tissue adhesive. Fibrinolysis autographic studies]. Med Welt 1982; 33:1820-4. [PMID: 6984724] [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: 01/22/2023]
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Oda T, Endrich B, Götz A, Messmer K. [Vascular changes during tumor growth. Possibilities of intravital microscopy in the observation of microcirculation]. Fortschr Med 1982; 100:1895-8. [PMID: 7152422] [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: 01/23/2023]
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Pirovino M, Grauer W, Götz A, Huber M, Altorfer J, Maranta E, Schmid M. [Importance of ultrasonography in the diagnosis of diffuse parenchymal disorders of the liver]. Schweiz Med Wochenschr 1982; 112:525-6. [PMID: 7079689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In a retrospective analysis, ultrasonographic findings were compared with the individual histological diagnosis in 49 patients with diffuse parenchymal liver disease and 5 healthy controls. Ultrasonography differentiates with great accuracy between normal liver tissue on the one hand and diffuse parenchymal liver disease such as cirrhosis and fatty liver on the other, but only poorly between cirrhosis and fatty liver. The combination of 4 single ultrasonographic criteria serves for diagnosis of liver cirrhosis with a very high degree of specificity but with low sensitivity. Among the various single criteria adopted, sound transmission is that for which interobserver variation is highest.
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Endrich B, Hammersen F, Götz A, Messmer K. Microcirculatory blood flow, capillary morphology and local oxygen pressure of the hamster amelanotic melanoma A-Mel-3. J Natl Cancer Inst 1982; 68:475-85. [PMID: 6950176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Transparent chambers and permanent indwelling catheters were implanted in the dorsal skin flaps of 24 inbred golden Syrian hamsters. After 48 hours, 4 x 10(4) amelanotic melanoma cells (A-Mel-3) were transplanted sc (12 hamsters) in areas exposed for intravital microscopy. A platinum multiwire electrode and techniques for a quantitative analysis of television images were used for measurements of local oxygen pressure (PO2), capillary blood cell velocity, capillary density, and capillary diameter and length, whereas capillary morphology was evaluated by electron microscopy. Compared to the mean local PO2 of the skin flaps of controls (12 hamsters), the mean local PO2 on the tumor surface of melanoma-bearing hamsters decreased with tumor size. Although capillary density of the melanoma was elevated 4 days after tumor transplantation, it decreased significantly until day 12. Of hemodynamic significance were huge platelet conglomerates in short, dilated capillaries. Electron microscopy revealed endothelial hyperplasia, open endothelial junctions, and disintegration of the capillary endothelium. These findings strongly suggest that elevated microvascular resistance, intratumor tissue pressure, and widening of intercapillary distances in the melanoma might significantly diminish the impact of chemotherapeutic treatment.
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