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Pokhrel S, Stahl J, Groeneveld JD, Schowalter M, Rosenauer A, Birkenstock J, Mädler L. Flame Aerosol Synthesis of Metal Sulfides at High Temperature in Oxygen-Lean Atmosphere. Adv Mater 2023:e2211104. [PMID: 37029337 DOI: 10.1002/adma.202211104] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 04/03/2023] [Indexed: 05/31/2023]
Abstract
The development of a novel reactive spray technology based on the well-known gas-phase metal oxide synthesis route provides innumerable opportunities for the production of non-oxide nanoparticles. Among these materials, metal sulfides are expected to have a high impact, especially in the development of electrochemical and photochemical high-surface-area materials. As a proof-of-principle, MnS, CoS, Cu2 S, ZnS, Ag2 S, In2 S3 , SnS, and Bi2 S3 are synthesized in an O2 -lean and sulfur-rich environment. In addition, the formation of Cu2 S in a single-droplet combustion experiment is reported. The multiscale approach combining flame sprays with single-droplet combustion is expected to pave the way toward a fundamental understanding of the gas-phase formation of metal sulfides in the future. The knowledge acquired can open the possibility for the development of a next-generation gas-phase technology facilitating the scalable synthesis of functional binary/ternary metal sulfides.
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Affiliation(s)
- Suman Pokhrel
- Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, D-28359, Bremen, Germany
- Leibniz Institute for Materials Engineering IWT, Badgasteiner Straße 3, D-28359, Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, D-28359, Bremen, Germany
| | - Jakob Stahl
- Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, D-28359, Bremen, Germany
- Leibniz Institute for Materials Engineering IWT, Badgasteiner Straße 3, D-28359, Bremen, Germany
| | - Jan Derk Groeneveld
- Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, D-28359, Bremen, Germany
- Leibniz Institute for Materials Engineering IWT, Badgasteiner Straße 3, D-28359, Bremen, Germany
| | - Marco Schowalter
- MAPEX Center for Materials and Processes, University of Bremen, D-28359, Bremen, Germany
- Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, 28359, Bremen, Germany
| | - Andreas Rosenauer
- MAPEX Center for Materials and Processes, University of Bremen, D-28359, Bremen, Germany
- Institute of Solid State Physics, University of Bremen, Otto-Hahn-Allee 1, 28359, Bremen, Germany
| | - Johannes Birkenstock
- Faculty of Geosciences/ Crystallography group, University of Bremen, Klagenfurter Str. 2-4, 28359, Bremen, Germany
| | - Lutz Mädler
- Faculty of Production Engineering, University of Bremen, Badgasteiner Straße 1, D-28359, Bremen, Germany
- Leibniz Institute for Materials Engineering IWT, Badgasteiner Straße 3, D-28359, Bremen, Germany
- MAPEX Center for Materials and Processes, University of Bremen, D-28359, Bremen, Germany
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Kneer K, Winter N, Stahl J, Kronlage C, Tabatabai G, Bombach P, Renovanz M, Grimm A. P-57 Nerve ultrasound in polyneuropathy secondary to immune checkpoint inhibitor therapy. Clin Neurophysiol 2023. [DOI: 10.1016/j.clinph.2023.02.074] [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: 03/08/2023]
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Latarnik S, Stahl J, Vossel S, Grefkes C, Fink GR, Weiss PH. The impact of apraxia and neglect on early rehabilitation outcome after stroke. Neurol Res Pract 2022; 4:46. [PMID: 36154935 PMCID: PMC9511731 DOI: 10.1186/s42466-022-00211-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 08/03/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
This study aims to characterize the impact of apraxia and visuospatial neglect on stroke patients’ cognitive and functional outcomes during early rehabilitation. Prior work implies an unfavorable effect of visuospatial neglect on rehabilitation; however, previous findings remain ambiguous and primarily considered long-term effects. Even less is known about the impact of apraxia on rehabilitation outcomes. Although clinicians agree on the significance of the first few weeks after stroke for the course of rehabilitation, studies exploring the impact of neglect and apraxia in this early rehabilitation period remain scarce.
Methods
Based on a screening of 515 hospitalized stroke patients from an early rehabilitation ward, 150 stroke patients (75 left-hemispheric strokes, 75 right hemispheric strokes) fulfilled the inclusion criteria and were enrolled in this observational, longitudinal study. The patients’ cognitive and functional statuses were documented at admission to the early rehabilitation ward and discharge. Also, detailed apraxia and neglect assessments were performed at midterm. The predictive values of age and apraxia and neglect severity (as reflected in two components from a principal component analysis of the neglect and apraxia assessments) for cognitive and functional outcomes at discharge were evaluated by multiple regression analyses.
Results
Besides the expected influence of the respective variables at admission, we observed a significant effect of apraxia severity on the cognitive outcome at discharge. Moreover, neglect severity predicted the Early Rehabilitation Barthel Index (Frühreha-Barthel-Index) at discharge. Supplementary moderator analysis revealed a differential effect of neglect severity on the cognitive outcome depending on the affected hemisphere.
Conclusion
Data indicate a strong association between apraxia and visuospatial neglect and early rehabilitation outcomes after stroke.
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Gäßler M, Stahl J, Schowalter M, Pokhrel S, Rosenauer A, Mädler L, Güttel R. The Impact of Support Material of Cobalt‐Based Catalysts Prepared by Double Flame Spray Pyrolysis on CO2 Methanation Dynamics. ChemCatChem 2022. [DOI: 10.1002/cctc.202200286] [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: 11/06/2022]
Affiliation(s)
- Max Gäßler
- Ulm University: Universitat Ulm Institute of Chemical Engineering GERMANY
| | - Jakob Stahl
- University of Bremen: Universitat Bremen Faculty of Production Engineering GERMANY
| | - Marco Schowalter
- University of Bremen: Universitat Bremen Institute of Solid State Physics GERMANY
| | - Suman Pokhrel
- University of Bremen: Universitat Bremen Faculty of Production Engineering GERMANY
| | - Andreas Rosenauer
- University of Bremen: Universitat Bremen Institute of Solid State Physics GERMANY
| | - Lutz Mädler
- University of Bremen: Universitat Bremen Faculty of Production Engineering GERMANY
| | - Robert Güttel
- Universitat Ulm Institute of Chemical Process Engineering Albert-Einstein-Allee 11 89081 Ulm GERMANY
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Stahl J, Ilsemann J, Pokhrel S, Schowalter M, Tessarek C, Rosenauer A, Eickhoff M, Bäumer M, Mädler L. Comparing Co‐catalytic Effects of ZrO
x
, SmO
x
, and Pt on CO
x
Methanation over Co‐based Catalysts Prepared by Double Flame Spray Pyrolysis. ChemCatChem 2021. [DOI: 10.1002/cctc.202001998] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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)
- Jakob Stahl
- Faculty of Production Engineering University of Bremen Badgasteiner Straße 1 28359 Bremen Germany
| | - Jan Ilsemann
- Institute of Applied and Physical Chemistry and Center for Environmental Research (UFT) University of Bremen Leobener Straße 6 28359 Bremen Germany
| | - Suman Pokhrel
- Faculty of Production Engineering University of Bremen Badgasteiner Straße 1 28359 Bremen Germany
- Leibniz Institute for Materials Engineering IWT Badgasteiner Straße 3 28359 Bremen Germany
| | - Marco Schowalter
- Institute of Solid State Physics University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
| | - Christian Tessarek
- Institute of Solid State Physics University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
| | - Andreas Rosenauer
- Institute of Solid State Physics University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
- MAPEX Center for Materials and Processes University of Bremen Postfach 330 440 Germany
| | - Martin Eickhoff
- Institute of Solid State Physics University of Bremen Otto-Hahn-Allee 1 28359 Bremen Germany
- MAPEX Center for Materials and Processes University of Bremen Postfach 330 440 Germany
| | - Marcus Bäumer
- Institute of Applied and Physical Chemistry and Center for Environmental Research (UFT) University of Bremen Leobener Straße 6 28359 Bremen Germany
- MAPEX Center for Materials and Processes University of Bremen Postfach 330 440 Germany
| | - Lutz Mädler
- Faculty of Production Engineering University of Bremen Badgasteiner Straße 1 28359 Bremen Germany
- Leibniz Institute for Materials Engineering IWT Badgasteiner Straße 3 28359 Bremen Germany
- MAPEX Center for Materials and Processes University of Bremen Postfach 330 440 Germany
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Landré S, Mailles A, Ader F, Epaulard O, Tattevin P, Stahl J. Encéphalites chez les patients immunodéprimés en France, 2016–2019. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mailles A, Martinot M, Piet E, Biron C, Gagneux-Brunon A, Gueit I, Argemi X, Patrat-Delon S, Tattevin P, Stahl J. Encéphalites chez les patients âgés en France, 2016–2019. Med Mal Infect 2020. [DOI: 10.1016/j.medmal.2020.06.326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Holenstein S, Stahl J, Shermadini Z, Simutis G, Grinenko V, Chareev DA, Khasanov R, Orain JC, Amato A, Klauss HH, Morenzoni E, Johrendt D, Luetkens H. Extended Magnetic Dome Induced by Low Pressures in Superconducting FeSe_{1-x}S_{x}. Phys Rev Lett 2019; 123:147001. [PMID: 31702214 DOI: 10.1103/physrevlett.123.147001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Indexed: 06/10/2023]
Abstract
We report muon spin rotation and magnetization measurements under pressure on Fe_{1+δ}Se_{1-x}S_{x} with x≈0.11. Above p≈0.6 GPa we find a microscopic coexistence of superconductivity with an extended dome of long range magnetic order that spans a pressure range between previously reported separated magnetic phases. The magnetism initially competes on an atomic scale with the coexisting superconductivity leading to a local maximum and minimum of the superconducting T_{c}(p). The maximum of T_{c} corresponds to the onset of magnetism while the minimum coincides with the pressure of strongest competition. A shift of the maximum of T_{c}(p) for a series of single crystals with x up to 0.14 roughly extrapolates to a putative magnetic and superconducting state at ambient pressure for x≥0.2.
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Affiliation(s)
- S Holenstein
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
- Physik-Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - J Stahl
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (D), 81377 München, Germany
| | - Z Shermadini
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - G Simutis
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - V Grinenko
- Institute of Solid State and Materials Physics, TU Dresden, DE-01069 Dresden, Germany
- Institute for Metallic Materials, Leibniz IFW Dresden, DE-01069 Dresden, Germany
| | - D A Chareev
- RAS, Institute of Experimental Mineralogy, Chernogolovka 123456, Russia
- Ural Federal University, Ekaterinburg 620002, Russia
- Kazan Federal University, Kazan 420008, Russia
| | - R Khasanov
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - J-C Orain
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - A Amato
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
| | - H-H Klauss
- Institute of Solid State and Materials Physics, TU Dresden, DE-01069 Dresden, Germany
| | - E Morenzoni
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
- Physik-Institut der Universität Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland
| | - D Johrendt
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (D), 81377 München, Germany
| | - H Luetkens
- Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
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Kusch M, Schmidt C, Göden L, Tscherpel C, Stahl J, Saliger J, Karbe H, Fink G, Weiss P. Recovery from apraxic deficits and its neural correlate. Restor Neurol Neurosci 2018; 36:669-678. [DOI: 10.3233/rnn-180815] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- M. Kusch
- Department of Neurology, University Hospital Cologne, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Jülich, Jülich, Germany
| | - C.C. Schmidt
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Jülich, Jülich, Germany
| | - L. Göden
- Department of Neurology, University Hospital Cologne, Cologne, Germany
| | - C. Tscherpel
- Department of Neurology, University Hospital Cologne, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Jülich, Jülich, Germany
| | - J. Stahl
- Department of Psychology, University of Cologne, Cologne, Germany
| | - J. Saliger
- Neurological Rehabilitation Centre Godeshöhe, Bonn, Germany
| | - H. Karbe
- Neurological Rehabilitation Centre Godeshöhe, Bonn, Germany
| | - G.R. Fink
- Department of Neurology, University Hospital Cologne, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Jülich, Jülich, Germany
| | - P.H. Weiss
- Department of Neurology, University Hospital Cologne, Cologne, Germany
- Cognitive Neuroscience, Institute of Neuroscience and Medicine (INM-3), Research Centre Jülich, Jülich, Germany
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Stahl J, Shlaen E, Singer H, Johrendt D. Systematic dimensional reduction of the layered β-FeSe structure by solvothermal synthesis. Dalton Trans 2018; 47:3264-3271. [PMID: 29441395 DOI: 10.1039/c8dt00025e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dimensional reduction of superconducting anti PbO-type iron selenide has been achieved by terminating the tetragonal square layers of FeSe4/4 tetrahedra by ethylenediamine (en) ligands. We obtained three new structures in the Fe-Se-en system. Fe3Se4(en)3 contains FeSe2 single chains bridged via Fe(en)3 complexes. Fe10Se12(en)7 has Fe2Se3 double strands separated by Fe(en)3 complexes and free en molecules. Fe0.85Se(en)0.3 conserves the tetragonal layers of bulk FeSe which are now widely separated by en molecules. Through systematic dilution of the solvent we were able to introduce an additional parameter in solvothermal synthesis and thus have control over the connectivity of the tetrahedra. Additionally, a phase diagram of the Fe-Se-en system is generated by variation of the reaction temperature. The magnetic properties of the FeSe derivatives range from superconductivity and antiferromagnetism to paramagnetism.
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Affiliation(s)
- J Stahl
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstr. 5-13 (D), 81377 München, Germany.
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Schett B, Wallner J, Weingart V, Ayvaz A, Richter U, Stahl J, Allescher HD. Efficacy and safety of cold snare resection in preventive screening colonoscopy. Endosc Int Open 2017; 5:E580-E586. [PMID: 28670614 PMCID: PMC5482746 DOI: 10.1055/s-0043-105491] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 02/10/2017] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND AND AIM Removal of polyps during colonoscopy effectively prevents the development of colorectal cancer. So far, snare resection with high frequency current with or without prior submucosal saline injection is the method of choice. The aim of this study was to evaluate the feasibility, safety, and outcome of cold snare resection during routine endoscopy. METHODS In this prospective study, 522 patients undergoing outpatient colonoscopy were included. Cold snare resection for diminutive (< 6 mm), small (6 - 9 mm), and larger polyps (> 9 - 15 mm) was performed using a dedicated cold snare device (Exacto ® ) without prior submucosal injection. Outcome parameters included bleeding rate, perforation rate, procedure time, histologic evaluation of polyp margins, and success rates. The data were compared to a group of patients undergoing hot snare resection. RESULTS Overall, 1233 polyps were removed using cold snare resection with an overall success rate of 99.4 %. All failures of cold snare resection occurred in the cecum (8/82, failure rate 9.8 %). In the remaining colon, the success rate was 100 %. Immediate post-polypectomy bleeding occurred in 0.49 % of all patients and was most frequently seen in polyps larger than 9 mm. The procedure time was significantly shorter using cold snare resection compared with hot snare resection (27.6 min vs. 35.7 min, P < 0.01). CONCLUSION Cold snare resection can be performed safely in outpatients for removal of small polyps in screening colonoscopy. It does not require prior saline injection and reduces procedure time without an increased risk of bleeding.
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Affiliation(s)
- B. Schett
- Zentrum für Innere Medizin, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany,Corresponding author Dr. B. Schett Zentrum Innere MedizinKlinikum Garmisch-PartenkirchenAuenstraße 682467 Garmisch-PartenkirchenGermany+49-8821-771502
| | - J. Wallner
- Zentrum für Innere Medizin, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany
| | - V. Weingart
- Zentrum für Innere Medizin, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany
| | - A. Ayvaz
- Zentrum für Innere Medizin, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany
| | - U. Richter
- Institut für Pathologie, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany
| | - J. Stahl
- Institut für Pathologie, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany
| | - H.-D. Allescher
- Zentrum für Innere Medizin, Klinikum Garmisch-Partenkirchen, Auenstr. 6, 82467 Garmisch-Partenkirchen, Germany
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Rijks JM, Kik ML, Slaterus R, Foppen R, Stroo A, IJzer J, Stahl J, Gröne A, Koopmans M, van der Jeugd HP, Reusken C. Widespread Usutu virus outbreak in birds in the Netherlands, 2016. ACTA ACUST UNITED AC 2017; 21:30391. [PMID: 27918257 PMCID: PMC5144937 DOI: 10.2807/1560-7917.es.2016.21.45.30391] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 11/09/2016] [Indexed: 12/14/2022]
Abstract
We report a widespread Usutu virus outbreak in birds in the Netherlands. Viral presence had been detected through targeted surveillance as early as April 2016 and increased mortality in common blackbirds and captive great grey owls was noticed from August 2016 onwards. Usutu virus infection was confirmed by post-mortem examination and RT-PCR. Extensive Usutu virus activity in the Netherlands in 2016 underlines the need to monitor mosquito activity and mosquito-borne infections in 2017 and beyond.
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Affiliation(s)
- J M Rijks
- Dutch Wildlife Health Centre (DWHC), Utrecht University, Utrecht, The Netherlands.,These authors contributed equally to the work
| | - M L Kik
- Dutch Wildlife Health Centre (DWHC), Utrecht University, Utrecht, The Netherlands.,These authors contributed equally to the work.,Veterinary Pathology Diagnostic Centre (VPDC), Division of Pathology, Department of Pathobiology, Utrecht University, Utrecht, The Netherlands
| | - R Slaterus
- Sovon, Dutch Centre for Field Ornithology, Nijmegen, The Netherlands
| | - Rpb Foppen
- Sovon, Dutch Centre for Field Ornithology, Nijmegen, The Netherlands.,Department of Animal Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, The Netherlands
| | - A Stroo
- Centre for Monitoring of Vectors (CMV), National Reference Centre (NRC), Netherlands Food and Consumer Product Safety Authority (NVWA), Ministry of Economic Affairs, Wageningen, The Netherlands
| | - J IJzer
- Dutch Wildlife Health Centre (DWHC), Utrecht University, Utrecht, The Netherlands.,Veterinary Pathology Diagnostic Centre (VPDC), Division of Pathology, Department of Pathobiology, Utrecht University, Utrecht, The Netherlands
| | - J Stahl
- Sovon, Dutch Centre for Field Ornithology, Nijmegen, The Netherlands
| | - A Gröne
- Dutch Wildlife Health Centre (DWHC), Utrecht University, Utrecht, The Netherlands.,Veterinary Pathology Diagnostic Centre (VPDC), Division of Pathology, Department of Pathobiology, Utrecht University, Utrecht, The Netherlands
| | - Mgp Koopmans
- ErasmusMC, Department of Viroscience, Rotterdam, The Netherlands
| | - H P van der Jeugd
- Vogeltrekstation - Dutch Centre for Avian Migration and Demography (NIOO-KNAW), Wageningen, The Netherlands
| | - Cbem Reusken
- ErasmusMC, Department of Viroscience, Rotterdam, The Netherlands
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Haimes J, Covino J, Manoj N, Baravik E, Johnson L, Griffin L, Stahl J, Myers J, Culver B, Kudlow B. Copy number variant detection by anchored multiplex PCR and next-generation sequencing. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw380.05] [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: 11/13/2022] Open
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14
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Stahl J, Haimes J, Johnson L, Covino J, Manoj N, Bessette M, Baravik E, Licon A, Walters R, Griffin L, Myers J, Culver B, Kudlow B. Comprehensive profiling of thyroid and lung cancers by anchored multiplex PCR and next-generation sequencing. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw380.06] [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: 11/12/2022] Open
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van Deusen B, Bessette M, Johnson L, Berlin A, Banos M, Griffin L, Reckase E, Stahl J, Licon A, Myers J, Kudlow B. Internal tandem duplications in FLT3 detected by anchored multiplex PCR and next-generation sequencing. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw380.08] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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16
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Kudlow B, Haimes J, Bessette M, Manoj N, Griffin L, Murphy D, Shoemaker R, Myers J, Stahl J. Genetic aberrations driving MET deregulation detected with anchored multiplex PCR and next-generation sequencing. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw380.07] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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17
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Gaudelus J, Martinot A, Stahl J, Denis F, Leboucher B, Subtil D, Lepetit H, Lery T, Pujol P, Cohen R. VAC-15 - Impact des tensions d’approvisionnement sur les couvertures vaccinales chez le nourrisson. Med Mal Infect 2016. [DOI: 10.1016/s0399-077x(16)30541-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Le MH, Warotayanont R, Stahl J, Den Besten PK, Nakano Y. Amelogenin Exon4 Forms a Novel miRNA That Directs Ameloblast and Osteoblast Differentiation. J Dent Res 2015; 95:423-9. [PMID: 26715056 DOI: 10.1177/0022034515622443] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Amelogenins constitute the major portion of secretory enamel matrix proteins and are known to be highly alternative spliced. Of all the alternatively spliced forms of amelogenins, exon4 is most commonly spliced out. Our analyses of the exon4 sequence led us to hypothesize that when spliced out, exon4 may generate a novel mature miRNA. To explore this possibility, we used in vivo mouse models (wild-type and Amel knockout mice) and in vitro cell culture to investigate the presence and function of a mature miRNA derived from exon4 (miR-exon4). When ameloblast-like cells (LS8) were transfected with an amelogenin minigene to increase amelogenin synthesis, the transfected cells synthesized miR-exon4. Introduction of a mutation in the conserved CNNC sequence required for primary miRNA recognition, downstream of the mature miR-exon4 sequence, resulted in a significantly reduced production of miR-exon4 in the transfected cells. In vivo, miR-exon4 was most highly amplified from wild-type mouse enamel organs at the secretory stage. In Amel knockout mice, an in vivo model for reduced amelogenin synthesis, we found reduced miR-exon4, with no changes in expression of enamel matrix-related genes. However, expression of Runx2 and its downstream genes Odam and Amtn were significantly downregulated. Transfection of miR-exon4 mimic to the LS8 cells also significantly upregulated Runx2. The mature miR-exon4 as well as Runx2 was also present in mouse osteoblasts with no apparent change in expression level between wild-type and Amel knockout mice. However, transfecting miR-exon4 inhibitor to the MC3T3-E1 osteoblastic cells resulted in a significant downregulation of Runx2 expression. These data indicate that when exon4 is spliced out, as occurs most of the time during alternative splicing of amelogenin pre-mRNA, a novel mature miRNA is generated from exon4. This miR-exon4 may contribute to the differentiation of ameloblasts and osteoblasts through regulation of Runx2 expression.
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Affiliation(s)
- M H Le
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - R Warotayanont
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA Children's Oral Health Research Center, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - J Stahl
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA Maxillofacial Injury and Disease Department, Naval Medical Research Unit, San Antonio, TX, USA
| | - P K Den Besten
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA Children's Oral Health Research Center, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - Y Nakano
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA Children's Oral Health Research Center, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
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Hoppe C, Blachut B, Surges R, Stahl J, Elger C, Helmstaedter C. V24. Seizure diaries from the patients’ perspective. Clin Neurophysiol 2015. [DOI: 10.1016/j.clinph.2015.04.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Bommarito M, Stahl J, Morse D, Reuter H. Monitoring the efficacy of the cleaning and disinfection process for flexible endoscopes by quantification of multiple biological markers. Antimicrob Resist Infect Control 2015. [PMCID: PMC4474687 DOI: 10.1186/2047-2994-4-s1-p56] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Amelogenins are proteins formed by alternative splicing of the amelogenin gene, and are essential for tooth enamel formation. However, the unique functions of various alternatively spliced amelogenins in enamel formation are not well understood. In this study, we determined the spatiotemporal location of amelogenins derived from transcripts containing exon4 (AMG+4) in the enamel matrix, and the relative binding of recombinant AMG+4 to hydroxyapatite (HAP). Immunohistochemistry and mass spectrometry analyses showed that AMG+4 proteins were secreted into the enamel matrix at the early maturation stage. A stage-specific increase in the synthesis of AMG+4 was further supported by our observation that in mice overexpressing leucine-rich amelogenin peptide (TgLRAP), in which ameloblasts differentiate earlier, AMG+4 transcripts were also upregulated earlier. In vitro binding studies, supported by in silico modeling of protein binding to calcium and phosphate, showed that more recombinant AMG+4 bound to hydroxyapatite (HAP) as compared with recombinant AMG-4. The temporal and spatial localization of amelogenins containing exon4 peptide, and their functional differences in HAP binding, suggests that the unique properties of amelogenins containing exon4 cause a specific enhancement of biomineralization related to stabilization of early-formed HAP at the maturation stage.
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Affiliation(s)
- J Stahl
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA Maxillofacial Injury and Disease Department, Naval Medical Research Unit, San Antonio, TX, USA
| | - Y Nakano
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - J Horst
- Department of Biochemistry and Biophysics, University of California, San Francisco, School of Medicine, San Francisco, CA, USA
| | - L Zhu
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - M Le
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - Y Zhang
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - H Liu
- Department of Obstetrics, Gynecology & Reproductive Sciences & Sandler-Moore Mass Spectrometry Core Facility, University of California, San Francisco, CA, USA
| | - W Li
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
| | - P K Den Besten
- Department of Orofacial Sciences, University of California, San Francisco, School of Dentistry, San Francisco, CA, USA
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Hupfauf S, Lambertz H, Stahl J, Schober J, Rothe M, Vogelsang H. Ergebnisse kolorektaler Lungenmetastasenchirurgie eines peripheren zertifizierten onkologischen Zentrums. Zentralbl Chir 2014. [DOI: 10.1055/s-0034-1389364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Schumacher S, Roth I, Stahl J, Bäumer W, Kietzmann M. Biodegradation of metallic magnesium elicits an inflammatory response in primary nasal epithelial cells. Acta Biomater 2014; 10:996-1004. [PMID: 24211732 DOI: 10.1016/j.actbio.2013.10.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 10/18/2013] [Accepted: 10/24/2013] [Indexed: 10/26/2022]
Abstract
Resorbable magnesium-based implants hold great promise for various biomedical applications, such as osteosynthesis and coronary stenting. They also offer a new therapeutic option for the treatment of chronic rhinosinusitis, but little data is yet available regarding the use of magnesium in the nasal cavity. To model this field of application, primary porcine nasal epithelial cells were used to test the biocompatibility of degrading pure magnesium and investigate whether the degradation products may also affect cellular metabolism. Magnesium specimens did not induce apoptosis and we found no major influence on enzyme activities or protein synthesis, but cell viability was reduced and elevated interleukin 8 secretion indicated proinflammatory reactions. Necrotic damage was most likely due to osmotic stress, and our results suggest that magnesium ion build-up is also involved in the interleukin 8 release. Furthermore, the latter seems to be mediated, at least in part, by the p38 signaling pathway. These effects probably depended on the accumulation of very high concentrations of magnesium ions in the in vitro set-up, which might not be achieved in vivo, although we cannot exclude that further, as yet unknown, factors played a role in the inflammatory response during the degradation process. In conclusion, the biocompatibility of pure magnesium with cells in the immediate vicinity appears less ideal than is often supposed, and this needs to be considered in the evaluation of magnesium materials containing additional alloying elements.
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Seitz JM, Eifler R, Stahl J, Kietzmann M, Bach FW. Characterization of MgNd2 alloy for potential applications in bioresorbable implantable devices. Acta Biomater 2012; 8:3852-64. [PMID: 22676917 DOI: 10.1016/j.actbio.2012.05.024] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 04/25/2012] [Accepted: 05/04/2012] [Indexed: 11/26/2022]
Abstract
The aim of this study is to investigate and demonstrate the mechanical and corrosive characteristics of the neodymium-containing magnesium alloy MgNd2 (Nd2), which can be used as a resorbable implant material, especially in the field of stenting applications. To determine the mechanical characteristics of Nd2, tensile and compression tests were initially carried out in the hot extruded state. Here a unique elongation ratio (~30%) of the alloy could be observed. Subsequent T5 and T6 heat treatments were arranged to reveal their effect on the alloy's strengths and elongation values. The general degradation behaviour of Nd2 in a 0.9% NaCl solution was investigated by means of polarization curves and hydrogen evolution. In addition to this, by using various in vivo parameters, a corrosion environment was established to determine the alloy's degradation in vitro. Here, the mass loss per day in (MgF(2) and Bioglass)-coated and uncoated states and the corresponding maximum forces resulting from subsequent three-point bending tests revealed slow and steady corrosion behaviour. The cell viability and proliferation tests carried out on L-929 and MSC-P5 cells also showed good results. The mechanical and corrosive characteristics determined, as well as the in vitro test results obtained within the scope of this study, led to the development and successful in vivo testing of an MgF(2)-coated Nd2 mucosa stent which was introduced as an appropriate resorbable application.
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Friebe M, Stahl J, Kietzmann M. The isolated perfused equine distal limb as an ex vivo model for pharmacokinetic studies. J Vet Pharmacol Ther 2012; 36:292-7. [PMID: 22913456 DOI: 10.1111/jvp.12001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2012] [Accepted: 07/23/2012] [Indexed: 11/30/2022]
Abstract
Even though intra-articular injections play an important role in the treatment of joint-related lameness in horses, little is known about pharmacokinetic properties of substances used. Therefore, an ex vivo model for pharmacokinetic studies was developed using distal forelimbs of slaughtered horses. The extremity was perfused with gassed Tyrode solution for up to 8 h. Tissue viability was confirmed by measurements of glucose consumption, lactate production, and lactate dehydrogenase activity in the perfusate. Standard criteria for tissue viability had been determined in preliminary experiments (n = 11), which also included histological examinations of the joint capsule. As the model's first implementation, the articular efflux rate of betamethasone (BM), administered as BM disodium phosphate intra-articularly to the fetlock joint (4 mg BM/joint), was investigated. The concentration of BM in the venous perfusate of the radial vein was measured by means of high-performance liquid chromatography. The average BM efflux rate per minute was calculated to be 5.1 μg/min with values ranging from 9 μg/min to 2.9 μg/min. 7.5 h after i.a. application, 2.3 mg BM had left the joint via the radial vein. Using this inexpensive setup, the presented model allows studying a variety of pharmacological topics without the ethical limitations of animal studies.
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Affiliation(s)
- M Friebe
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany.
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Lüssenhop J, Stahl J, Wolken S, Schnieder T, Kietzmann M, Bäumer W. Distribution of permethrin in hair and stratum corneum after topical administration of four different formulations in dogs. J Vet Pharmacol Ther 2011; 35:206-8. [PMID: 21806638 DOI: 10.1111/j.1365-2885.2011.01324.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J Lüssenhop
- Department of Pharmacology, Toxicology and Pharmacy, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
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Kainz K, Chen G, Chang Y, Prah D, Shukla H, Stahl J, Li X. SU-E-T-417: A Planning and Delivery Study of a Rotational IMRT Technique with Burst Delivery. Med Phys 2011. [DOI: 10.1118/1.3612371] [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: 11/07/2022] Open
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Ellinger M, Koelling ME, Miller DA, Severance FL, Stahl J. Exploring optimal current stimuli that provide membrane voltage tracking in a neuron model. Biol Cybern 2011; 104:185-195. [PMID: 21394539 DOI: 10.1007/s00422-011-0427-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2010] [Accepted: 02/16/2011] [Indexed: 05/30/2023]
Abstract
Studying neurons from an energy efficiency perspective has produced results in the research literature. This paper presents a method that enables computation of low energy input current stimuli that are able to drive a reduced Hodgkin-Huxley neuron model to approximate a prescribed time-varying reference membrane voltage. An optimal control technique is used to discover an input current that optimally minimizes a user selected balance between the square of the input stimulus current (input current 'energy') and the difference between the reference voltage and the membrane voltage (tracking error) over a stimulation period. Selecting reference signals to be membrane voltages produced by the neuron model in response to common types of input currents i(t) enables a comparison between i(t) and the determined optimal current stimulus i*(t). The intent is not to modify neuron dynamics, but through comparison of i(t) and i*(t) provide insight into neuron dynamics. Simulation results for four different bifurcation types demonstrate that this method consistently finds lower energy stimulus currents i*(t) that are able to approximate membrane voltages as produced by higher energy input currents i(t) in this neuron model.
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Affiliation(s)
- M Ellinger
- Department of Electrical and Computer Engineering, Western Michigan University, Kalamazoo, MI 49008, USA
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Dzyakanava V, Burningham K, Stahl J. Virucidal efficacy of topical antiseptics versus a novel strain of Influenza H1N1. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.2041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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Stahl J, Niedorf F, Kietzmann M. Characterisation of epidermal lipid composition and skin morphology of animal skin ex vivo. Eur J Pharm Biopharm 2009; 72:310-6. [DOI: 10.1016/j.ejpb.2008.09.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2008] [Revised: 08/26/2008] [Accepted: 09/22/2008] [Indexed: 11/28/2022]
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Khaĭrulina IS, Molotkov MV, Bulygin KN, Graĭfer DM, Ven'yaminova AG, Frolova LI, Stahl J, Karpova GG. [Protein S3 fragments neighboring mRNA during elongation and translation termination on the human ribosome]. Bioorg Khim 2009; 34:773-80. [PMID: 19088750 DOI: 10.1134/s1068162008060071] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Protein S3 fragments were determined that crosslink to modified mRNA analogues in positions +5 to +12 relative to the first nucleotide in the P-site binding codon in model complexes mimicking states of ribosomes at the elongation and translation termination steps. The mRNA analogues contained a Phe codon UUU/UUC at the 5'-termini that could predetermine the position of the tRNA(Phe) on the ribosome by the location of P-site binding and perfluorophenylazidobenzoyl group at a nucleotide in various positions 3' of the UUU/UUC codon. The crosslinked S3 protein was isolated from 80S ribosomal complexes irradiated with mild UV light and subjected to cyanogen bromide-induced cleavage at methionine residues with subsequent identification of the crosslinked oligopeptides. An analysis of the positions of modified oligopeptides resulting from the cleavage showed that, in dependence on the positions of modified nucleotides in the mRNA analogue, the crosslinking sites were found in the N-terminal half of the protein (fragment 2-127) and/or in the C-terminal fragment 190-236; the latter reflects a new peculiarity in the structure of the mRNA binding center in the ribosome, unknown to date. The results of crosslinking did not depend on the type of A-site codon or on the presence of translation termination factor eRF1.
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Affiliation(s)
- Iu S Khaĭrulina
- Institute of Chemical Biology and Fundamental Medicine, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
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Phillips ML, Boase S, Wahlroos S, Dugar M, Kow L, Stahl J, Slavotinek JP, Valentine R, Toouli J, Thompson CH. Associates of change in liver fat content in the morbidly obese after laparoscopic gastric banding surgery. Diabetes Obes Metab 2008; 10:661-7. [PMID: 17941875 DOI: 10.1111/j.1463-1326.2007.00793.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [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: 12/20/2022]
Abstract
AIM Hepatic steatosis affects up to 30% of the population. After weight loss, monitoring of the change in hepatic steatosis is not routinely performed. This study aimed to define the closest associates of change in liver fat content in a population of obese females following laparoscopic gastric banding surgery. METHODS Before and 3 months after surgery, proton magnetic resonance spectroscopy and magnetic resonance imaging were used to estimate the amount of lipid contained within the liver and abdominal subcutaneous and visceral compartments of 29 obese [mean body mass index (BMI) 39 +/- 5 kg/m(2)], non-diabetic women aged between 20 and 62 years. Liver enzymes, fasting plasma glucose and insulin were also measured as well as body weight, BMI and waist circumference. Insulin sensitivity was estimated using homeostasis model assessment insulin resistance index. RESULTS Significant reductions occurred in body weight (p < 0.001), abdominal fat volumes (p < 0.001) and liver fat (p = 0.037) 3 months after surgery. Change in liver fat content more closely associated with change in serum gamma-glutamyl transferase (GGT; r = 0.71, p < 0.001) than with changes in weight (r = 0.10, p = 0.612) and waist circumference (r = 0.15, p = 0.468). CONCLUSIONS Our findings suggest that obese non-diabetic female patients who have undergone significant weight loss over 3 months can be better assessed for the regression of excess liver fat content by monitoring changes in serum GGT levels rather than changes in simple anthropometry.
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Affiliation(s)
- M L Phillips
- Department of General Medicine, Flinders Medical Centre, Bedford Park, South Australia, Australia.
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van der Graaf A, Stahl J, Veen G, Havinga R, Drent R. Patch choice of avian herbivores along a migration trajectory–From Temperate to Arctic. Basic Appl Ecol 2007. [DOI: 10.1016/j.baae.2006.07.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Roch N, Salameire D, Courby S, Orsini-Piocelle F, Pegourie-Bandelier B, Gressin R, Dumontet C, Sturm N, Berger F, Toffart A, Guellerin J, Gereige G, Hincky V, Epaulard O, Brion J, Pavese P, Larrat S, Morand P, Stahl J. P640 Fatal viral opportunistic infections and Epstein-Barr virus positive large B-cell lymphoma after alemtuzumab treatment for a refractory Sezary syndrome. Int J Antimicrob Agents 2007. [DOI: 10.1016/s0924-8579(07)70482-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Affiliation(s)
- J Stahl
- Department of Medicine, College of Physicians and Surgeons, Columbia University, New York City
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Grover PK, Miyazawa K, Coleman M, Stahl J, Ryall RL. Renal prothrombin mRNA is significantly decreased in a hyperoxaluric rat model of nephrolithiasis. J Pathol 2006; 210:273-81. [PMID: 16981243 DOI: 10.1002/path.2061] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Although urinary prothrombin fragment 1 (UPTF1) possesses several hallmarks expected of a regulatory protein in urolithiasis, its precise role remains unknown. To determine the relationship between renal prothrombin (PT), the parent molecule of UPTF1, and lithogenesis, this study quantified and compared levels of renal PT mRNA in healthy rats (n = 10) and rats rendered lithogenic (n = 10) by ingestion of 0.75% ethylene glycol for 8 weeks. Studies included morphological and histological examination of the kidneys with scanning electron microscopy of the urinary filtrates of control and experimental animals. Haematuria and calcium oxalate (CaOx) crystals occurred in the urine of all experimental rats, but not in those of controls. Histological examination showed birefringent nephroliths and associated damage in kidneys of lithogenic rats, which were not seen in the control group. The amounts of total RNA extracted from both groups of rats were similar, but the median ratio of PT to beta-actin transcript of 11.14 x 10(-4) (10.65 x 10(-4) +/- 2.24 x 10(-4)) in the control rats was significantly (p < or = 0.001) reduced to 6.47 x 10(-4) (6.57 x 10(-4) +/- 2.72 x 10(-4)) in the lithogenic group. These results demonstrate that renal PT mRNA is reduced by approximately 42% in lithogenic rats and confirm the existence of a direct association between renal PT synthesis and calculogenesis. Attempts to compare renal PT and urinary levels of PTF1 were unsuccessful because of interference from hepatic PT circulating in the blood, haematuria, and the presence of urinary CaOx crystals. This is the first report of a significant reduction in the renal expression of a urinary protein well documented to inhibit CaOx crystal growth and aggregation in undiluted human urine in vitro.
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Affiliation(s)
- P K Grover
- Urology Unit, Department of Surgery, Flinders Medical Centre and Flinders University Bedford Park 5042, South Australia, Australia.
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Cook E, Stahl J, Barney N, Graziano F. Mechanisms of Antihistamines and Mast Cell Stabilizers in Ocular Allergic Inflammation. ACTA ACUST UNITED AC 2004. [DOI: 10.2174/1567203043401662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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van der Graaf AJ, Lavrinenko OV, Elsakov V, van Eerden MR, Stahl J. Habitat use of barnacle geese at a subarctic salt marsh in the Kolokolkova Bay, Russia. Polar Biol 2004. [DOI: 10.1007/s00300-004-0623-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [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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Hall RE, Horsfall DJ, Stahl J, Vivekanandan S, Ricciardelli C, Stapleton AMF, Scardino PT, Neufing P, Tilley WD. Apolipoprotein-D: a novel cellular marker for HGPIN and prostate cancer. Prostate 2004; 58:103-8. [PMID: 14716735 DOI: 10.1002/pros.10343] [Citation(s) in RCA: 27] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND High grade prostatic intraepithelial neoplasia (HGPIN) is a putative pre-malignant lesion of the prostate. While apolipoprotein-D (Apo-D), an androgen-regulated hydrophobic transporter protein, is expressed in prostate tumors, its expression in HGPIN is unknown. METHODS Immunoreactivity for Apo-D and another androgen-regulated protein, prostate specific antigen (PSA), was investigated in 64 radical prostatectomy tissues by video image analysis. RESULTS Eighty two percent of prostatectomy specimens demonstrated moderate to strong Apo-D immunoreactivity in areas of HGPIN. In comparison, weak Apo-D immunoreactivity was observed in non-malignant areas in only 24% of specimens. The median (range) percentage cellular area of HGPIN immunopositive for Apo-D (9.7%, 0-42.9), and the cellular concentration of Apo-D (MIOD 3.1, 0-13.3), were intermediate between that of normal (area 0%, 0-53.5%, MIOD 0, 0-12.6) and early stage prostate cancer tissues (area 29.2%, 0-90.8%, MIOD 6.7, 0-28.1). This increase in Apo-D expression from non-malignant, through HGPIN to prostate cancer was statistically significant (P < 0.001), and contrasted with the decrease observed in PSA staining between adjacent areas of normal glands, HGPIN, and cancer (P = 0.026). CONCLUSIONS The presence of high levels of immunoreactive Apo-D in HGPIN and prostate cancer, but not in non-malignant epithelial cells, is consistent with HGPIN being an intermediate lesion in the transition to prostate cancer, and suggests that cellular Apo-D expression is a marker of malignant transformation of the prostate.
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Affiliation(s)
- R E Hall
- Department of Surgery, Flinders University and Flinders Medical Centre, Adelaide, South Australia
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Mahnken A, Seyfarth T, Flohr T, Stierstorfer K, Stahl J, Wildberger JE, Günther RW, Schaller S. Beurteilbarkeit von Koronarstents mit der Flächendetektor CT: in-vitro Ergebnisse. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-827700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Stahl J, Bergstrom B, Gershon R. CAT administration of language placement examinations. J Appl Meas 2002; 1:292-302. [PMID: 12029172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
This article describes the development of a computerized adaptive test for Cegep de Jonquiere, a community college located in Quebec, Canada. Computerized language proficiency testing allows the simultaneous presentation of sound stimuli as the question is being presented to the test-taker. With a properly calibrated bank of items, the language proficiency test can be offered in an adaptive framework. By adapting the test to the test-taker's level of ability, an assessment can be made with significantly fewer items. We also describe our initial attempt to detect instances in which "cheating low" is occurring. In the "cheating low" situation, test-takers deliberately answer questions incorrectly, questions that they are fully capable of answering correctly had they been taking the test honestly.
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Affiliation(s)
- J Stahl
- Computer Adaptive Technologies, Inc., 1007 Church St., 7th Floor, Evanston, IL 60201, USA.
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Abstract
UNLABELLED The telemedicine project of the Competence Net Pediatric Oncology of the German/Austrian Gesellschaft für Pädiatrische Onkologie und Hämatologie (GPOH) has as an initial step of its work-programme sent out a questionnaire to the 54 largest pediatric hematology/oncology units in Germany. Institutions were asked for their experience, motivation, existing infrastructure, and anticipated benefits and obstacles regarding the implementation of telemedicine in patient care and research. Of the 54 largest German Pediatric Oncology institutions asked, 46 completed the questionnaire (85 %). RESULTS 1. The need for further detailed information on implementation and for help in technical realization of telemedicine applications was expressed by all participants. 2. The majority expected practical advantages from telemedicine communication and anticipated that telemedicine will increase quality in treating children with cancer. 3. Expert consultation (study chairman, reference radiologists) is stated as to be most important. 4. Thirty-three of 46 physicians (72 %) believe that telemedicine will reduce costs in medical care within the next years. 5. It is anticipated that the introduction of telemedicine is time consuming. 6. The lack of available medical informatics competence and manpower was regarded as the most important obstacle. 7. Data security and standardization, transfer speed and transmission quality are considered most important. 8. Most of the institutions (91 %) use computers in the management of patients. Fourty-four (96 %) are connected to the Internet. 9. Thirty-seven of 46 institutions were prepared to invest in the implementation of telemedicine. This analysis demonstrates that the use of telemedicine is expected to become standard in pediatric oncology, while the existing infrastructure and status of information regarding this subject at present are insufficient. The most pressing practical need for telemedicine applications is seen in the field of electronic expert consultation. Hence, the Telemedicine-Project of the GPOH Competence Net will focus on this aspect first.
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Affiliation(s)
- N Graf
- Universitätsklinik für Kinder- und Jugendmedizin, Pädiatrische Onkologie, Homburg.
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Mulberrry G, Snyder AT, Heilman J, Pyrek J, Stahl J. Evaluation of a waterless, scrubless chlorhexidine gluconate/ethanol surgical scrub for antimicrobial efficacy. Am J Infect Control 2001; 29:377-82. [PMID: 11743484 DOI: 10.1067/mic.2001.118842] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A new waterless surgical hand preparation containing 1% chlorhexidine gluconate (CHG) and 61% ethyl alcohol was evaluated for antimicrobial efficacy in comparison with a standard 4% CHG surgical scrub and a 61% ethyl alcohol control. Clinical studies were based on the Tentative Final Monograph for Health-Care Antiseptic Drug Products (TFM) (proposed rule) and the Standard Test Method for Evaluation of Surgical Hand Scrub Formulations (ASTM E1115-91). Two randomized, blinded, well-controlled clinical studies involving 137 healthy subjects were conducted to evaluate the antimicrobial effectiveness of the CHG/ethanol hand preparation in producing an immediate and persistent reduction in the normal bacterial flora of the hands. The CHG/ethanol hand preparation was applied without scrubbing or the use of water, and a standard 4% CHG reference product was applied with a scrub brush in 2 traditional 3-minute surgical scrubs. In 1 study, a 61% ethanol vehicle control treatment was applied without scrubbing or use of water. During a 5-day period, each study subject performed a series of 11 surgical scrubs with 1 of the test treatments. After the first treatment on days 1, 2, and 5, surgical gloves were worn for 3 or 6 hours. Bacterial samples were taken with the glove-juice technique at 1 minute, 3 hours, and 6 hours after treatment. The immediate bactericidal effect of the CHG/ethanol hand preparation after a single application resulted in a 2.5-log reduction in normal flora. This bactericidal effect persisted throughout the studies and eventually increased to a 3.6-log reduction after the 11th scrub on day 5. The log reductions of the CHG/ethanol hand preparation proved to be significantly better (P <.05) than that of the 4% CHG product at each sampling interval on days 1 and 2 and the sampling at 6 hours on day 5 and significantly better than the 61% ethanol vehicle at all times. The combination of 1% CHG and 61% ethanol had significantly greater microbial reduction than either the 4% CHG (without ethanol) or the 61% ethanol vehicle (without CHG).
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Affiliation(s)
- G Mulberrry
- Hill Top Research, Inc., Miamiville, Ohio 45147, USA
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Abstract
Exposure to high concentrations of oxygen in the neonatal period may impair lung growth and is a major contributing factor to the development of bronchopulmonary dysplasia. Cell death from hyperoxic injury may occur through either an apoptotic or nonapoptotic pathway, and we were interested in determining the type of cell death that occurs in the lung of neonatal mice exposed to hyperoxia. We found increased levels of Bax messenger RNA, a gene associated with apoptosis, in the lungs of neonatal mice born and raised in 92% hyperoxia. We next determined the extent of apoptosis taking place in the lungs of neonatal mice exposed to hyperoxia using terminal deoxyribonucleotidyl transferase-mediated deoxyuridine triphosphate-biotin nick-end labeling in 3.5-, 4.5-, and 5.5-d-old neonatal lung. The number of apoptotic cells in peripheral lung was significantly higher in the 3.5-, 4.5-, and 5.5-d-old mice treated with oxygen compared with that in the room-air control mice. Further, the number of apoptotic cells in the lung increased with longer exposure duration. In murine lung bronchus cells exposed to hyperoxia, growth arrest occurred after 48 h of oxygen exposure. Using annexin V binding, necrotic cell death was found to be the major form of cell death in these cells after 72 h of hyperoxic exposure. We conclude that 92% hyperoxia causes significant lung injury in neonatal mice exposed to hyperoxia, and that the number of apoptotic cells in the lung increases the longer the duration of exposure. The increase in apoptosis from hyperoxic exposure during a critical period of lung development may be an important factor in the impaired lung growth and remodeling that occur in animals exposed to high oxygen concentrations. Finally, it appears that hyperoxic injured cells in neonatal lung undergo both apoptotic and nonapoptotic cell death.
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Affiliation(s)
- S A McGrath-Morrow
- Department of Pediatrics, Eudowood Division of Pediatric Respiratory Sciences, Johns Hopkins Medical Institutions, Baltimore, Maryland, USA.
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Pflanz S, Kernebeck T, Giese B, Herrmann A, Pachta-Nick M, Stahl J, Wollmer A, Heinrich PC, Müller-Newen G, Grötzinger J. Signal transducer gp130: biochemical characterization of the three membrane-proximal extracellular domains and evaluation of their oligomerization potential. Biochem J 2001; 356:605-12. [PMID: 11368791 PMCID: PMC1221875 DOI: 10.1042/0264-6021:3560605] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Glycoprotein 130 (gp130) is a type I transmembrane protein and serves as the common signal-transducing receptor subunit of the interleukin-6-type cytokines. Whereas the membrane-distal half of the gp130 extracellular part confers ligand binding and has been subject to intense investigation, the structural and functional features of its membrane-proximal half are poorly understood. On the basis of predictions of tertiary structure, the membrane-proximal part consists of three fibronectin-type-III-like domains D4, D5 and D6. Here we describe the bacterial expression of the polypeptides predicted to comprise each of these three domains. The recombinant proteins were refolded from solubilized inclusion bodies in vitro, purified to homogeneity and characterized by means of size-exclusion chromatography and CD spectroscopy. For the first time the prediction of three individual membrane-proximal protein domains for gp130 has been verified experimentally. The three domains do not show intermediate-affinity or high-affinity interactions between each other. Mapping of a neutralizing gp130 monoclonal antibody against D4 suggested a particular functional role of this domain for gp130 activation, because above that an intrinsic tendency for low-affinity oligomerization was demonstrated for D4.
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Affiliation(s)
- S Pflanz
- Department of Biochemistry, RWTH Aachen, Pauwelsstrasse 30, 52074 Aachen, Germany
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Mohr W, Stahl J, Hampel F, Gladysz JA. Bent and stretched but not yet to the breaking point: C(8)-C(16) sp carbon chains that span two platinum atoms and the first structurally characterized 1,3,5,7,9,11,13,15-octayne. Inorg Chem 2001; 40:3263-4. [PMID: 11421667 DOI: 10.1021/ic010309z] [Citation(s) in RCA: 84] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- W Mohr
- Institut für Organische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestrasse 42, 91054 Erlangen, Germany
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Fukushi S, Okada M, Stahl J, Kageyama T, Hoshino FB, Katayama K. Ribosomal protein S5 interacts with the internal ribosomal entry site of hepatitis C virus. J Biol Chem 2001; 276:20824-6. [PMID: 11331271 DOI: 10.1074/jbc.c100206200] [Citation(s) in RCA: 95] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Translational initiation of hepatitis C virus (HCV) genome RNA occurs via its highly structured 5' noncoding region called the internal ribosome entry site (IRES). Recent studies indicate that HCV IRES and 40 S ribosomal subunit form a stable binary complex that is believed to be important for the subsequent assembly of the 48 S initiation complex. Ribosomal protein (rp) S9 has been suggested as the prime candidate protein for binding of the HCV IRES to the 40 S subunit. RpS9 has a molecular mass of approximately 25 kDa in UV cross-linking experiments. In the present study, we examined the approximately 25-kDa proteins of the 40 S ribosome that form complexes with the HCV IRES upon UV cross-linking. Immunoprecipitation with specific antibodies against two 25-kDa 40 S proteins, rpS5 and rpS9, clearly identified rpS5 as the protein bound to the IRES. Thus, our results support rpS5 as the critical element in positioning the HCV RNA on the 40 S ribosomal subunit during translation initiation.
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Affiliation(s)
- S Fukushi
- Research and Development Center, BioMedical Laboratories, 1361-1 Matoba, Kawagoe, Saitama 350-1101, Japan.
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Larson EL, Aiello AE, Bastyr J, Lyle C, Stahl J, Cronquist A, Lai L, Della-Latta P. Assessment of two hand hygiene regimens for intensive care unit personnel. Crit Care Med 2001; 29:944-51. [PMID: 11378602 DOI: 10.1097/00003246-200105000-00007] [Citation(s) in RCA: 136] [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] [Indexed: 10/26/2022]
Abstract
OBJECTIVE To compare skin condition and skin microbiology among intensive care unit personnel using one of two randomly assigned hand hygiene regimens: a 2% chlorhexidine gluconate (CHG)-containing traditional antiseptic wash and a waterless handrub containing 61% ethanol with emollients (ALC). DESIGN Prospective, randomized clinical trial. SETTING Two critical care units (medical and surgical) in a large, metropolitan academic health center in Manhattan. SUBJECTS Fifty staff members (physicians, nurses, housekeepers, respiratory therapists) working full time in the intensive care unit. INTERVENTIONS One of two hand hygiene regimens randomly assigned for four consecutive weeks. MEASUREMENTS AND MAIN RESULTS The two outcomes were skin condition (measured by two tools: Hand Skin Assessment form and Visual Skin Scaling form) and skin microbiology. Samples were obtained at baseline, on day 1, and at the end of wks 2 and 4. Participants in the ALC group had significant improvements in the Hand Skin Assessment scores at wk 4 (p = 0.04) and in Visual Skin Scaling scores at wks 3 (p = 0.01) and 4 (p = 0.0005). There were no significant differences in numbers of colony-forming units between participants in the CHG or ALC group at any time period. The ALC regimen required significantly less time than the CHG regimen (mean: 12.7 secs and 21.1 secs, respectively; p = 0.000) and resulted in a 50% reduction in material costs. CONCLUSIONS Changes in hand hygiene practices in acute care settings from the traditional antiseptic wash to use of plain, mild soap and an alcohol-based product should be considered. Further research is needed to examine the association between use of antiseptic products for hand hygiene of staff and reductions in nosocomial infection rates among patients.
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Affiliation(s)
- E L Larson
- Columbia University School of Nursing, New York, NY, USA
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