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Masjosthusmann S, Barenys M, Baumann J, Bendt F, Becker D, Deenen R, Förster N, Mosig A, Hübenthal U, Klose J, Köhrer K, Petzuch B, Schmuck M, Temme T, Fritsche E. Molecular and chemical response signatures illustrate species differences of developing neural progenitor cells from human, mouse and rat. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.055] [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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Schmuck MR, Temme T, Dach K, de Boer D, Barenys M, Bendt F, Mosig A, Fritsche E. Omnisphero: a high-content image analysis (HCA) approach for phenotypic developmental neurotoxicity (DNT) screenings of organoid neurosphere cultures in vitro. Arch Toxicol 2016; 91:2017-2028. [DOI: 10.1007/s00204-016-1852-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 09/15/2016] [Indexed: 01/21/2023]
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Barenys M, Gassmann K, Baksmeier C, Heinz S, Reverte I, Schmuck M, Temme T, Bendt F, Zschauer TC, Rockel TD, Unfried K, Wätjen W, Sundaram SM, Heuer H, Colomina MT, Fritsche E. Epigallocatechin gallate (EGCG) inhibits adhesion and migration of neural progenitor cells in vitro. Arch Toxicol 2016; 91:827-837. [PMID: 27116294 DOI: 10.1007/s00204-016-1709-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 04/06/2016] [Indexed: 01/18/2023]
Abstract
Food supplements based on herbal products are widely used during pregnancy as part of a self-care approach. The idea that such supplements are safe and healthy is deeply seated in the general population, although they do not underlie the same strict safety regulations than medical drugs. We aimed to characterize the neurodevelopmental effects of the green tea catechin epigallocatechin gallate (EGCG), which is now commercialized as high-dose food supplement. We used the "Neurosphere Assay" to study the effects and unravel underlying molecular mechanisms of EGCG treatment on human and rat neural progenitor cells (NPCs) development in vitro. EGCG alters human and rat NPC development in vitro. It disturbs migration distance, migration pattern, and nuclear density of NPCs growing as neurospheres. These functional impairments are initiated by EGCG binding to the extracellular matrix glycoprotein laminin, preventing its binding to β1-integrin subunits, thereby prohibiting cell adhesion and resulting in altered glia alignment and decreased number of migrating young neurons. Our data raise a concern on the intake of high-dose EGCG food supplements during pregnancy and highlight the need of an in vivo characterization of the effects of high-dose EGCG exposure during neurodevelopment.
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Affiliation(s)
- Marta Barenys
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Kathrin Gassmann
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Christine Baksmeier
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Sabrina Heinz
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Ingrid Reverte
- Laboratory of Toxicology and Environmental Health/NEUROLAB, Department of Psychology, Universitat Rovira i Virgili, Campus Sescelades, 43007, Tarragona, Spain
| | - Martin Schmuck
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Thomas Temme
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Farina Bendt
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Tim-Christian Zschauer
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Thomas Dino Rockel
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Klaus Unfried
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Wim Wätjen
- Institute of Agricultural and Nutritional Sciences, Martin-Luther-Universität Halle-Wittenberg, Weinbergweg 22, 06120, Halle/Saale, Germany
| | - Sivaraj Mohana Sundaram
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Heike Heuer
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany
| | - Maria Teresa Colomina
- Laboratory of Toxicology and Environmental Health/NEUROLAB, Department of Psychology, Universitat Rovira i Virgili, Campus Sescelades, 43007, Tarragona, Spain
| | - Ellen Fritsche
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225, Düsseldorf, Germany.
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Schmuck M, Temme T, Heinz S, Baksmeier C, Mosig A, Colomina MT, Barenys M, Fritsche E. Automatic counting and positioning of 5-bromo-2-deoxyuridine (BrdU) positive cells in cortical layers of rat brain slices. Neurotoxicology 2014; 43:127-133. [PMID: 24572144 DOI: 10.1016/j.neuro.2014.02.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2013] [Revised: 02/13/2014] [Accepted: 02/14/2014] [Indexed: 11/15/2022]
Abstract
5-Bromo-2-deoxyuridine (BrdU) staining is often used to evaluate cortical layer formation during mammalian brain development. This method allows the quantification of newly generated cells and therefore the study of the effects of xenobiotics or genetic factors on proliferation, cell death and migration behavior in a quantitative manner. However, these endpoints are generally assessed by time-consuming manual evaluation. In the present work, we introduce a novel procedure to identify and quantify BrdU(+) cells within cortical layers, using the commercially available vHCS-Scan V.6.3.1 software to identify BrdU(+) cell coordinates and the novel program 'BrdeLuxe' to define cortical layers and quantitatively assign BrdU(+) cells to them. This procedure is compared to BrdU(+) cell counting with the freeware 'ImageJ' in respect to the manual evaluation, all by two different researchers. BrdeLuxe shows high accuracy and precision for the determination of total number of BrdU(+) cells compared to the manual counting, while ImageJ does not reach such results. Accuracy and precision are also higher for employing the BrdeLuxe program to evaluate the percentage of BrdU(+) cells per brain layer compared to ImageJ. In terms of running time, BrdeLuxe is the fastest method of the three making it more suitable for multiple brain slices analyses.
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Affiliation(s)
- Martin Schmuck
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany
| | - Thomas Temme
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany; Bioinformatics Group, Department of Biophysics, Ruhr-Universität Bochum, 44780, Germany
| | - Sabrina Heinz
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany
| | - Christine Baksmeier
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany
| | - Axel Mosig
- Bioinformatics Group, Department of Biophysics, Ruhr-Universität Bochum, 44780, Germany
| | - M Teresa Colomina
- Laboratory of Toxicology and Environmental Health/NEUROLAB, Department of Psychology, Universitat Rovira i Virgili, Campus Sescelades, 43007 Tarragona, Spain
| | - Marta Barenys
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany
| | - Ellen Fritsche
- IUF - Leibniz Research Institute for Environmental Medicine, Auf'm Hennekamp 50, 40225 Düsseldorf, Germany.
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Schönfeld N, Temme T, Schwarz C, Serke M, Ott S. [Modern endoscopic procedures for diseases of the respiratory tract]. Dtsch Med Wochenschr 2007; 132:2633-6. [PMID: 18050029 DOI: 10.1055/s-2007-993111] [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: 10/22/2022]
Abstract
Bronchoscopy is the most important diagnostic procedure for the work-up of central bronchial processes and parenchymal lung diseases, such as lung cancer, pneumonias or diffuse lung diseases. Recent progress - ultrasound, navigation systems or ultrathin bronchoscopes - was made to achieve a better yield in the diagnosis of peripheral and peribronchial lesions. Bronchial recanalisation by thermal ablation or stenting is mainly performed with rigid instruments; these procedures as well as brachytherapy in local anaesthesia should be restricted to specialized centers. If pleuracentesis does not provide the etiology of pleural effusion, thoracoscopy in local anaesthesia is the method of choice. The procedure does not only provide a definite diagnosis for almost all of the patients, it also allows the immediate option for talcum poudrage in case of pleural malignancy.
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Affiliation(s)
- N Schönfeld
- Lungenklinik Heckeshorn, HELIOS Klinikum Emil von Behring, Berlin.
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Leineweber K, Bruck H, Temme T, Heusch G, Philipp T, Brodde OE. The Arg389Gly β1-adrenoceptor polymorphism does not affect cardiac effects of exercise after parasympathetic inhibition by atropine. Pharmacogenet Genomics 2006; 16:9-13. [PMID: 16344717 DOI: 10.1097/01.fpc.0000184956.16077.93] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 10/22/2022]
Abstract
UNLABELLED In vitro, Arg389Gly beta1-adrenoceptor (AR) polymorphism exhibits decreased beta-AR signalling. In vivo, beta1-AR-mediated cardiac effects of exercise showed no genotype-dependent differences in Arg389 vs. Gly389 beta1-AR subjects. We studied in 16 male subjects homozygous Arg389 or Gly389 beta1-AR, whether blockade of parasympathetic activity might unmask genotype-dependence of exercise effects. Subjects were infused with atropine (10 microg/kg i.v. loading dose followed by continuous i.v. infusion of 0.15 microg/kg/min throughout exercise-time); 20 min after start of atropine bicycle-exercise in supine position (25, 50, 75 and 100 W for 5 min each) was performed and heart rate, contractility, blood pressure, plasma noradrenaline and plasma-renin activity were assessed. Exercise-evoked increases in all but one parameters were not different between Arg389 and Gly389 beta1-AR subjects; only plasma noradrenaline increased slightly more in Gly389 vs. Arg389 beta1-AR subjects. IN CONCLUSION It appears to be unlikely that lack of Arg389Gly beta1-AR genotype-dependence of exercise-effects can be explained by influences of parasympathetic activity.
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Bruck H, Leineweber K, Temme T, Weber M, Heusch G, Philipp T, Brodde OE. The Arg389Gly beta1-adrenoceptor polymorphism and catecholamine effects on plasma-renin activity. J Am Coll Cardiol 2005; 46:2111-5. [PMID: 16325050 DOI: 10.1016/j.jacc.2005.08.041] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.2] [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] [Received: 05/04/2005] [Revised: 08/11/2005] [Accepted: 08/22/2005] [Indexed: 11/20/2022]
Abstract
OBJECTIVES The purpose of this research was to find out whether, in humans, dobutamine-induced hemodynamic effects and increase in plasma-renin activity (PRA) might be beta1-adrenoceptor (beta1AR) genotype-dependent. BACKGROUND In vitro Arg389Gly-beta1AR polymorphism exhibits decreased receptor signaling. METHODS We studied 10 male homozygous Arg389-beta1AR subjects and 8 male homozygous Gly389beta1AR subjects; to avoid influences of codon 49 polymorphism, all were homozygous Ser49-beta1AR. Subjects were infused with dobutamine (1 to 6 microg/kg/min) with or without bisoprolol (10 mg orally) pretreatment, and PRA, heart rate, contractility, and blood pressure were assessed. RESULTS With regard to PRA, dobutamine increased PRA more potently in Arg389-beta1AR versus Gly389-beta1AR subjects. Bisoprolol markedly suppressed the dobutamine-induced PRA increase in Arg389- but only marginally in Gly389-beta1AR subjects. With regard to hemodynamics, dobutamine caused larger heart rate and contractility increases and diastolic blood pressure decreases in Arg389- versus Gly389-beta1AR subjects. Bisoprolol reduced dobutamine-induced heart rate and contractility increases and diastolic blood pressure decreases more potently in Arg389- versus Gly389-beta1AR subjects. CONCLUSIONS Codon 389 beta1AR polymorphism is a determinant not only of hemodynamic effects but also of PRA. Thus, beta1AR polymorphisms may be useful for predicting therapeutic responses to betaAR-blocker treatment.
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Affiliation(s)
- Heike Bruck
- Department of Nephrology, University of Essen Medical School, Essen, Germany
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Bruck H, Poller U, Lüssenhop H, Pönicke K, Temme T, Heusch G, Philipp T, Brodde OE. ?2-Adrenoceptor-mediated intrinsic sympathomimetic activity of carteolol: an in vivo study. Naunyn Schmiedebergs Arch Pharmacol 2004; 370:361-8. [PMID: 15526107 DOI: 10.1007/s00210-004-0988-4] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 07/27/2004] [Accepted: 09/09/2004] [Indexed: 10/26/2022]
Abstract
The intrinsic sympathomimetic activity (ISA) of a beta-adrenoceptor blocker can be mediated by beta(1)- or beta(2)-adrenoceptors. The aim of this study was to characterize the ISA of the beta-adrenoceptor blocker carteolol in healthy volunteers. Two approaches were employed. First, we assessed the effects of carteolol (20, 40 or 80 mg p.o.) on blood pressure, heart rate and heart-rate corrected duration of electromechanical systole (QS(2)c, a measure of cardiac contractility) in the volunteers. Carteolol dose-dependently increased systolic blood pressure, heart rate and contractility and decreased diastolic blood pressure. The beta(1)-adrenoceptor blocker bisoprolol did not attenuate these carteolol effects, but rather enhanced the effects on heart rate and systolic blood pressure. Second, we treated volunteers for 7 days with 1 x 20 mg/day carteolol and assessed lymphocyte beta(2)-adrenoceptor density (by (-)-[(125)I]-iodocyanopindolol binding) and functional responsiveness (by 10 muM isoprenaline-induced increase in lymphocyte cyclic AMP content). Carteolol significantly reduced lymphocyte beta(2)-adrenoceptor density and function. After withdrawal of carteolol lymphocyte beta(2)-adrenoceptor density and function recovered only very slowly and had not returned to control levels 11 days after carteolol withdrawal. In conclusion, the fact that, on the one hand, the cardiovascular effects of carteolol were not attenuated by the beta(1)-adrenoceptor blocker bisoprolol and, on the other, carteolol significantly decreased lymphocyte beta(2)-adrenoceptor density and function is in favour of the idea that the ISA of carteolol is mediated by beta(2)-adrenoceptors. Involvement of an additional receptor site (e.g. the propranolol-resistant state of the beta(1)-adrenoceptor), however, cannot be excluded.
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Affiliation(s)
- Heike Bruck
- Department of Nephrology, University of Essen Medical School, 45147 Essen, Germany
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Schönfeld N, Temme T, Serke M, Loddenkemper R. [High frequency diathermy--a new method in the treatment of malignant and benign stenosis of the airways]. Pneumologie 1999; 53:477-9. [PMID: 10596549 DOI: 10.1055/s-1999-9043] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
High-frequency electrocautery is a relatively new method in the treatment of malignant or benign airway stenoses. We report on the results of 58 sessions in 41 patients (malignant condition n = 30, benign n = 11) within a three-year period. Various instruments were available for coagulation (blunt probe, knives of 4, 5 and 7 mm length, forceps and wire snare). 53/58 sessions were performed under general anaesthesia, energy was limited to 40 W with unlimited duration of pulses. The knives were the most frequently used devices, preferably with a length of 5 mm, which enabled us to either cut the tumour or scar tissue precisely slice by slice or to resect by direct coagulation. The use of the blunt probes and forceps was frequently rendered more difficult by detritus covering the instrument during coagulation. Polypes were easily resected with the wire snare, but this kind of tumour was found in four patients only. Major (> 100 ml) bleeding occurred in two patients. Obstructing fibrinous membranes were never seen after electrocautery. In conclusion, high-frequency electrocautery is an effective and safe method for endobronchial resection and can be considered a good alternative to the laser as the classical method for endobronchial resection.
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Baunack S, Oswald S, Tönshoff HK, von Alvensleben F, Temme T. Surface characterisation of laser irradiated SiC ceramics by AES and XPS. ACTA ACUST UNITED AC 1999. [DOI: 10.1007/s002160051467] [Citation(s) in RCA: 10] [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: 11/24/2022]
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