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Braun U, Hennig O, Forstner J, Gerhardt S, Deffaa M, Hirjak D, Deuschle M, Koopmann A, Wisch C, Fritz M, Ende G, Tost H, Schöfer P, Bischoff S, Janta M, Kiefer F, Schmahl C, Banaschewski T, Meyer-Lindenberg A. [Diagnosis and admission center : Establishment and evaluation of an integrated translational infrastructure for clinical psychiatric research]. Nervenarzt 2024; 95:254-261. [PMID: 38381168 PMCID: PMC10914871 DOI: 10.1007/s00115-024-01609-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 12/14/2023] [Indexed: 02/22/2024]
Abstract
The routine in-depth characterization of patients with methods of clinical and scale-based examination, neuropsychology, based on biomaterials, and sensor-based information opens up transformative possibilities on the way to personalized diagnostics, treatment and prevention in psychiatry, psychotherapy, and psychosomatics. Effective integration of the additional temporal and logistical effort into everyday care as well as the acceptance by patients are critical to the success of such an approach but there is little evidence on this to date. We report here on the establishment of the Diagnosis and Admission Center (DAZ) at the Central Institute of Mental Health (ZI) in Mannheim. The DAZ is an outpatient unit upstream of other care structures for clinical and scientific phenotyping across diagnoses as a starting point for data-driven, individualized pathways to further treatment, diagnostics or research. We describe the functions, goals, and implementation of the newly created clinical scientific translational structure, provide an overview of the patient populations it has reached, and provide data on its acceptance. In this context, the close integration with downstream clinical processes enables a better coordinated and demand-oriented allocation. In addition, DAZ enables a faster start of disorder-specific diagnostics and treatment. Since its launch in April 2021 up to the end of 2022, 1021 patients underwent psychiatric evaluation at DAZ during a pilot phase. The patient sample corresponded to a representative sample from standard care and the newly established processes were regarded as helpful by patients. In summary, the DAZ uniquely combines the interests and needs of patient with the collection of scientifically relevant data.
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Affiliation(s)
- Urs Braun
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland.
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland.
| | - Oliver Hennig
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Johanna Forstner
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Sarah Gerhardt
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Mirjam Deffaa
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Dusan Hirjak
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Michael Deuschle
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Anne Koopmann
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Christian Wisch
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Melanie Fritz
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Gabriele Ende
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland
| | - Heike Tost
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland
| | - Peter Schöfer
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Stefan Bischoff
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Matthias Janta
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
| | - Falk Kiefer
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland
| | - Christian Schmahl
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland
| | - Tobias Banaschewski
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland
| | - Andreas Meyer-Lindenberg
- Zentralinstitut für Seelische Gesundheit, Medizinische Fakultät Mannheim, Universität Heidelberg, J5, 68159, Mannheim, Deutschland
- Deutsches Zentrum für Psychische Gesundheit (DZPG), Mannheim-Heidelberg-Ulm, Deutschland
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Fritz M, Chen X, Yang G, Lv Y, Liu M, Wehner S, Fischer CB. Gold Nanoparticles Bioproduced in Cyanobacteria in the Initial Phase Opened an Avenue for the Discovery of Corresponding Cerium Nanoparticles. Microorganisms 2024; 12:330. [PMID: 38399735 PMCID: PMC10892827 DOI: 10.3390/microorganisms12020330] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2024] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 02/25/2024] Open
Abstract
The production of isolated metallic nanoparticles with multifunctionalized properties, such as size and shape, is crucial for biomedical, photocatalytic, and energy storage or remediation applications. This study investigates the initial particle formations of gold nanoparticles (AuNPs) bioproduced in the cyanobacteria Anabaena sp. using high-resolution transmission electron microscopy images for digital image analysis. The developed method enabled the discovery of cerium nanoparticles (CeNPs), which were biosynthesized in the cyanobacteria Calothrix desertica. The particle size distributions for AuNPs and CeNPs were analyzed. After 10 h, the average equivalent circular diameter for AuNPs was 4.8 nm, while for CeNPs, it was approximately 5.2 nm after 25 h. The initial shape of AuNPs was sub-round to round, while the shape of CeNPs was more roundish due to their amorphous structure and formation restricted to heterocysts. The local PSDs indicate that the maturation of AuNPs begins in the middle of vegetative cells and near the cell membrane, compared to the other regions of the cell.
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Affiliation(s)
- Melanie Fritz
- Department of Physics, University of Koblenz, 56070 Koblenz, Germany
| | - Xiaochen Chen
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Guifang Yang
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Yuancai Lv
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Minghua Liu
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Stefan Wehner
- Department of Physics, University of Koblenz, 56070 Koblenz, Germany
| | - Christian B. Fischer
- Department of Physics, University of Koblenz, 56070 Koblenz, Germany
- Materials Science, Energy and Nano-Engineering Department, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco
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Fritz M, Körsten S, Chen X, Yang G, Lv Y, Liu M, Wehner S, Fischer CB. Time-Dependent Size and Shape Evolution of Gold and Europium Nanoparticles from a Bioproducing Microorganism, a Cyanobacterium: A Digitally Supported High-Resolution Image Analysis. Nanomaterials (Basel) 2022; 13:130. [PMID: 36616040 PMCID: PMC9824745 DOI: 10.3390/nano13010130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 12/23/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Herein, the particle size distributions (PSDs) and shape analysis of in vivo bioproduced particles from aqueous Au3+ and Eu3+ solutions by the cyanobacterium Anabaena sp. are examined in detail at the nanoscale. Generally, biosynthesis is affected by numerous parameters. Therefore, it is challenging to find the key set points for generating tailored nanoparticles (NPs). PSDs and shape analysis of the Au and Eu-NPs were performed with ImageJ using high-resolution transmission electron microscopy (HR-TEM) images. As the HR-TEM image analysis reflects only a fraction of the detected NPs within the cells, additional PSDs of the complete cell were performed to determine the NP count and to evaluate the different accuracies. Furthermore, local PSDs were carried out at five randomly selected locations within a single cell to identify local hotspots or agglomerations. The PSDs show that particle size depends mainly on contact time, while the particle shape is hardly affected. The particles formed are distributed quite evenly within the cells. HR-PSDs for Au-NPs show an average equivalent circular diameter (ECD) of 8.4 nm (24 h) and 7.2 nm (51 h). In contrast, Eu-NPs preferably exhibit an average ECD of 10.6 nm (10 h) and 12.3 nm (244 h). Au-NPs are classified predominantly as "very round" with an average reciprocal aspect ratio (RAR) of ~0.9 and a Feret major axis ratio (FMR) of ~1.17. Eu-NPs mainly belong to the "rounded" class with a smaller RAR of ~0.6 and a FMR of ~1.3. These results show that an increase in contact time is not accompanied by an average particle growth for Au-NPs, but by a doubling of the particle number. Anabaena sp. is capable of biosorbing and bioreducing dissolved Au3+ and Eu3+ ions from aqueous solutions, generating nano-sized Au and Eu particles, respectively. Therefore, it is a low-cost, non-toxic and effective candidate for a rapid recovery of these sought-after metals via the bioproduction of NPs with defined sizes and shapes, providing a high potential for scale-up.
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Affiliation(s)
- Melanie Fritz
- Department of Physics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
| | - Susanne Körsten
- Department of Physics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
| | - Xiaochen Chen
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Guifang Yang
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Yuancai Lv
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Minghua Liu
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, China
| | - Stefan Wehner
- Department of Physics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
| | - Christian B. Fischer
- Department of Physics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
- Materials Science, Energy and Nano-Engineering Department, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco
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Schmidt J, Weisbrod M, Fritz M, Aschenbrenner S. Kognition und Kraftfahreignung bei chronischem Schmerzsyndrom. Nervenarzt 2022; 94:335-343. [PMID: 36169672 PMCID: PMC10104908 DOI: 10.1007/s00115-022-01387-y] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/25/2022] [Indexed: 10/14/2022]
Abstract
ZusammenfassungKognitive Auffälligkeiten bei Patienten mit chronischen Schmerzen finden in wissenschaftlichen Untersuchungen zunehmend Beachtung. Die Folgen dieser kognitiven Störungen in Bezug auf die Schmerzbewältigung, die Alltagsgestaltung und die Kraftfahreignung werden in der klinischen Praxis jedoch kaum berücksichtigt, obwohl die Hälfte aller Patienten davon betroffen ist. Die vorliegende Arbeit fasst die aktuelle Studienlage zusammen und diskutiert Möglichkeiten der Integration in die klinische und therapeutische Versorgung.
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Affiliation(s)
- J Schmidt
- Abteilung für Klinische Psychologie und Neuropsychologie, SRH Klinikum Karlsbad, Guttmannstr. 1, 76307, Karlsbad-Langensteinbach, Deutschland.
- Medizinische Fakultät Heidelberg der Universität Heidelberg, Heidelberg, Deutschland.
| | - M Weisbrod
- Abteilung für Psychiatrie und Psychotherapie, SRH Klinikum Karlsbad, Karlsbad-Langensteinbach, Deutschland
- Klinik für Allgemeine Psychiatrie, Zentrum für Psychosoziale Medizin, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
| | - M Fritz
- Abteilung für Neurologie, SRH Klinikum Karlsbad, Karlsbad-Langensteinbach, Deutschland
| | - S Aschenbrenner
- Abteilung für Klinische Psychologie und Neuropsychologie, SRH Klinikum Karlsbad, Guttmannstr. 1, 76307, Karlsbad-Langensteinbach, Deutschland
- Abteilung für Psychiatrie und Psychotherapie, SRH Klinikum Karlsbad, Karlsbad-Langensteinbach, Deutschland
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Javaid M, Fritz M, O'Brien M, Clark S, Mitchell S, Sanchez SE. Use and Perceptions of Shared Decision-Making by General Surgery Faculty and Trainees. J Surg Res 2022; 276:323-330. [DOI: 10.1016/j.jss.2022.03.009] [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] [Received: 06/29/2021] [Revised: 02/10/2022] [Accepted: 03/10/2022] [Indexed: 11/26/2022]
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Fritz M, Körsten S, Chen X, Yang G, Lv Y, Liu M, Wehner S, Fischer CB. High-resolution particle size and shape analysis of the first Samarium nanoparticles biosynthesized from aqueous solutions via cyanobacteria Anabaena cylindrica. NanoImpact 2022; 26:100398. [PMID: 35560296 DOI: 10.1016/j.impact.2022.100398] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 03/09/2022] [Accepted: 03/24/2022] [Indexed: 06/15/2023]
Abstract
Samarium (Sm) is one of the most sought-after rare earth metals. Price trends and dwindling resources are making recovery increasingly attractive. In this context, the use of cyanobacteria is highly promising. For Sm it was unclear whether Anabaena cylindrica produces particles through metabolically active Sm3+ uptake. High-resolution (HR) imaging now clearly demonstrates microbe generated biosynthesis of Sm nano-sized particles (Sm NPs) in vivo. Furthermore, a simple method to determine particle size and shape with high accuracy is presented. Digital image analysis with ImageJ of HR-TEMs is used to characterize Sm NPs revealing a nearly uniform local size distribution. Assuming round particles, the overall average area size is 135.5 nm2, resp. 11.9 nm diameter. In HR, where different cell sections of the same cell are averaged, the mean particle is smaller, 76.7 nm2 resp. 8.9 nm diameter. The reciprocal aspect ratio is 0.63. The Feret major axis ratio is calculated as shape factor, with 35% of the particles between 1.2 and 1.4. A roundness classification shows that 38% of particles are fairly round and 41% are very round. Consequently, A. cylindrica represents a suitable microorganism for possible Sm recovery and biosynthesis of roundish nano-sized particles.
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Affiliation(s)
- Melanie Fritz
- Department of Physics, Institute of Integrated Naturals Sciences and Mathematics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
| | - Susanne Körsten
- Department of Physics, Institute of Integrated Naturals Sciences and Mathematics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
| | - Xiaochen Chen
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, PR China
| | - Guifang Yang
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, PR China
| | - Yuancai Lv
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, PR China
| | - Minghua Liu
- Fujian Provincial Engineering Research Center of Rural Waste Recycling Technology, College of Environment & Resources, Fuzhou University, Fuzhou 350116, PR China
| | - Stefan Wehner
- Department of Physics, Institute of Integrated Naturals Sciences and Mathematics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany
| | - Christian B Fischer
- Department of Physics, Institute of Integrated Naturals Sciences and Mathematics, University Koblenz-Landau, Universitätsstraße 1, D-56070 Koblenz, Germany; Materials Science, Energy and Nano-engineering Department, Mohammed VI Polytechnic University, 43150 Ben Guerir, Morocco.
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Wu S, Lamarre E, Fritz M, Ku J, Reddy C, Brauer P, Woody N, Campbell S, Koyfman S. Risk of Osteoradionecrosis in Reconstructed vs.Native Mandibles in Oral Cavity Cancer Following Intensity-Modulated Radiotherapy. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2021.12.136] [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: 11/16/2022]
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Schlebrowski T, Lüber H, Beucher L, Fritz M, Benjillali Y, Bentaouit M, Hahn B, Wehner S, Fischer CB. Plasma Supported Deposition of Amorphous Hydrogenated Carbon (a-C:H) on Polyamide 6: Determining Interlayer Completion and Dehydrogenation Effects during Layer Growth. Polymers (Basel) 2021; 13:polym13111886. [PMID: 34204089 PMCID: PMC8201342 DOI: 10.3390/polym13111886] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 04/27/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 11/22/2022] Open
Abstract
Polyamide 6 (PA6) is a commonly used material in many different sectors of modern industry. Herein, PA6 samples were coated with amorphous carbon layers (a-C:H) with increasing thickness up to 2 µm using radio frequency plasma enhanced chemical vapor deposition for surface adjustment. The morphology of the carbon coatings was inspected by ex situ atomic force microscopy and scanning electron microscopy. Surface wettability was checked by contact angle measurements. The chemical composition was analyzed using the surface sensitive synchrotron X-ray-based techniques near-edge X-ray absorption fine structure and X-ray photoelectron spectroscopy, supported by diffuse reflectance infrared Fourier transform spectroscopy. Particular attention was paid to the coating interval from 0 to 100 nm, to specify the interlayer thickness between the PA6 polymer and a-C:H coating, and the region between 1000 and 2000 nm, where dehydrogenation of the a-C:H layer occurs. The interlayer is decisive for the linkage of the deposited carbon layer on the polymer: the more pronounced it is, the better the adhesion. The thickness of the interlayer could be narrowed down to 40 nm in all used methods, and the dehydrogenation process takes place at a layer thickness of 1500 nm.
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Affiliation(s)
- Torben Schlebrowski
- Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany; (H.L.); (L.B.); (M.F.); (S.W.)
- Correspondence: (T.S.); (C.B.F.)
| | - Henriette Lüber
- Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany; (H.L.); (L.B.); (M.F.); (S.W.)
| | - Lucas Beucher
- Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany; (H.L.); (L.B.); (M.F.); (S.W.)
| | - Melanie Fritz
- Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany; (H.L.); (L.B.); (M.F.); (S.W.)
| | - Youssef Benjillali
- Department of Material Analysis, RheinAhrCampus, University of Applied Sciences, 53424 Remagen, Germany; (Y.B.); (M.B.); (B.H.)
| | - Mohammed Bentaouit
- Department of Material Analysis, RheinAhrCampus, University of Applied Sciences, 53424 Remagen, Germany; (Y.B.); (M.B.); (B.H.)
| | - Barbara Hahn
- Department of Material Analysis, RheinAhrCampus, University of Applied Sciences, 53424 Remagen, Germany; (Y.B.); (M.B.); (B.H.)
| | - Stefan Wehner
- Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany; (H.L.); (L.B.); (M.F.); (S.W.)
| | - Christian B. Fischer
- Department of Physics, University Koblenz-Landau, 56070 Koblenz, Germany; (H.L.); (L.B.); (M.F.); (S.W.)
- Materials Science, Energy and Nano-Engineering Department, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco
- Correspondence: (T.S.); (C.B.F.)
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Hughes A, Woodward A, Fritz M, Reeves M. UNMET NEEDS AMONG ACUTE STROKE SURVIVORS TRANSITIONING HOME. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.190] [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: 11/12/2022] Open
Affiliation(s)
- A Hughes
- Michigan State University School of Social Work
| | - A Woodward
- Michigan State University School of Social Work
| | - M Fritz
- Michigan State University Department of Epidemiology
| | - M Reeves
- Michigan State University Department of Epidemiology
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Hawkins Bressler L, Yuan L, Fitz V, Hoff H, Fritz M, Young S. Granulocyte colony stimulating factor (GCSF) treatment augments human endometrial decidualization: mechanism of a therapeutic effect. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.680] [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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Wolter J, Lantuit H, Wetterich S, Rethemeyer J, Fritz M. Climatic, geomorphologic and hydrologic perturbations as drivers for mid- to late Holocene development of ice-wedge polygons in the western Canadian Arctic. Permafr Periglac Process 2018; 29:164-181. [PMID: 31543690 PMCID: PMC6743709 DOI: 10.1002/ppp.1977] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 05/03/2018] [Accepted: 05/20/2018] [Indexed: 06/10/2023]
Abstract
Ice-wedge polygons are widespread periglacial features and influence landscape hydrology and carbon storage. The influence of climate and topography on polygon development is not entirely clear, however, giving high uncertainties to projections of permafrost development. We studied the mid- to late Holocene development of modern ice-wedge polygon sites to explore drivers of change and reasons for long-term stability. We analyzed organic carbon, total nitrogen, stable carbon isotopes, grain size composition and plant macrofossils in six cores from three polygons. We found that all sites developed from aquatic to wetland conditions. In the mid-Holocene, shallow lakes and partly submerged ice-wedge polygons existed at the studied sites. An erosional hiatus of ca 5000 years followed, and ice-wedge polygons re-initiated within the last millennium. Ice-wedge melt and surface drying during the last century were linked to climatic warming. The influence of climate on ice-wedge polygon development was outweighed by geomorphology during most of the late Holocene. Recent warming, however, caused ice-wedge degradation at all sites. Our study showed that where waterlogged ground was maintained, low-centered polygons persisted for millennia. Ice-wedge melt and increased drainage through geomorphic disturbance, however, triggered conversion into high-centered polygons and may lead to self-enhancing degradation under continued warming.
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Affiliation(s)
- J. Wolter
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchResearch Unit Potsdam, Periglacial Research SectionPotsdamGermany
| | - H. Lantuit
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchResearch Unit Potsdam, Periglacial Research SectionPotsdamGermany
- University of PotsdamInstitute of Earth and Environmental SciencesPotsdamGermany
| | - S. Wetterich
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchResearch Unit Potsdam, Periglacial Research SectionPotsdamGermany
| | - J. Rethemeyer
- University of CologneInstitute for Geology and MineralogyCologneGermany
| | - M. Fritz
- Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchResearch Unit Potsdam, Periglacial Research SectionPotsdamGermany
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Van Eijk JJ, Dalton HR, Ripellino P, Madden RG, Jones C, Fritz M, Gobbi C, Melli G, Pasi E. 1700 Clinical phenotype and outcome of hepatitis E virus associated neuralgic amyotrophy (hev-na); an international multicentre retrospective comparative study. J Neurol Neurosurg Psychiatry 2017. [DOI: 10.1136/jnnp-2017-abn.18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Schmidt C, Wiedmann F, El-Battrawy I, Fritz M, Ratte A, Lang S, Rudic B, Karck M, Borggrefe M, Katus H, Zhou X, Thomas D. P5835Characterization of a novel genetic variant associated with Brugada syndrome: beta-2-syntrophin mutation impairs interaction with SCN5A and reduces Na+ current in human cardiomyocytes. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5835] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Hughes A, Reeves M, Fritz M. THE MISTT STUDY. Innov Aging 2017. [DOI: 10.1093/geroni/igx004.2288] [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: 11/12/2022] Open
Affiliation(s)
- A.K. Hughes
- School of Social Work, Michigan State University, East Lansing, Michigan
| | - M. Reeves
- School of Social Work, Michigan State University, East Lansing, Michigan
| | - M. Fritz
- School of Social Work, Michigan State University, East Lansing, Michigan
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Appachi S, Scharpf J, Koyfman S, Greskovich J, Adelstein D, Nwizu T, Burkey B, Chute D, Fritz M, Reddy C. Analyis of Prognostic Factors and Outcomes Following Parotidectomy for Cutaneous Squamous Cell Carcinoma Metastatic to the Parotid Gland. Int J Radiat Oncol Biol Phys 2016. [DOI: 10.1016/j.ijrobp.2015.12.333] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fritz M, Vanselow J, Sauer N, Lamer S, Goos C, Siegel TN, Subota I, Schlosser A, Carrington M, Kramer S. Novel insights into RNP granules by employing the trypanosome's microtubule skeleton as a molecular sieve. Nucleic Acids Res 2015; 43:8013-32. [PMID: 26187993 PMCID: PMC4652759 DOI: 10.1093/nar/gkv731] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 07/07/2015] [Indexed: 02/07/2023] Open
Abstract
RNP granules are ribonucleoprotein assemblies that regulate the post-transcriptional fate of mRNAs in all eukaryotes. Their exact function remains poorly understood, one reason for this is that RNP granule purification has not yet been achieved. We have exploited a unique feature of trypanosomes to prepare a cellular fraction highly enriched in starvation stress granules. First, granules remain trapped within the cage-like, subpellicular microtubule array of the trypanosome cytoskeleton while soluble proteins are washed away. Second, the microtubules are depolymerized and the granules are released. RNA sequencing combined with single molecule mRNA FISH identified the short and highly abundant mRNAs encoding ribosomal mRNAs as being excluded from granules. By mass spectrometry we have identified 463 stress granule candidate proteins. For 17/49 proteins tested by eYFP tagging we have confirmed the localization to granules, including one phosphatase, one methyltransferase and two proteins with a function in trypanosome life-cycle regulation. The novel method presented here enables the unbiased identification of novel RNP granule components, paving the way towards an understanding of RNP granule function.
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Affiliation(s)
- Melanie Fritz
- Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Jens Vanselow
- Rudolf Virchow Center, University of Würzburg, Josef-Schneider-Str. 2, 97080 Würzburg, Germany
| | - Nadja Sauer
- Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Stephanie Lamer
- Rudolf Virchow Center, University of Würzburg, Josef-Schneider-Str. 2, 97080 Würzburg, Germany
| | - Carina Goos
- Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - T Nicolai Siegel
- Research Center for Infectious Diseases, University of Würzburg, Josef-Schneider-Str. 2, 97080 Würzburg, Germany
| | - Ines Subota
- Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Andreas Schlosser
- Rudolf Virchow Center, University of Würzburg, Josef-Schneider-Str. 2, 97080 Würzburg, Germany
| | - Mark Carrington
- Department of Biochemistry, Tennis Court Road, Cambridge CB2 1QW, UK
| | - Susanne Kramer
- Biocenter, University of Würzburg, Am Hubland, 97074 Würzburg, Germany
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Marhofer P, Anderl W, Heuberer P, Fritz M, Kimberger O, Marhofer D, Klug W, Blasl J. A retrospective analysis of 509 consecutive interscalene catheter insertions for ambulatory surgery. Anaesthesia 2014; 70:41-6. [DOI: 10.1111/anae.12840] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/29/2014] [Indexed: 11/26/2022]
Affiliation(s)
- P. Marhofer
- Medical University of Vienna; Vienna Austria
| | - W. Anderl
- St. Vincent Hospital; Vienna Austria
| | | | - M. Fritz
- Medical University of Vienna; Vienna Austria
| | | | - D. Marhofer
- Medical University of Vienna; Vienna Austria
| | - W. Klug
- Medical University of Vienna; Vienna Austria
| | - J. Blasl
- St. Vincent Hospital; Vienna Austria
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Fritz M, Schlinke H, Fayyazi A. [Tropheryma whipplei endocarditis]. Pathologe 2013; 35:274-6. [PMID: 23807487 DOI: 10.1007/s00292-013-1791-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Whipple's disease is a rare infectious disease caused by the bacterium Tropheryma whipplei. Usually the course of the disease is characterized by fever, diarrhea, weight loss and polyarthritis. We report on a case with a 10-year course of the disease with endocarditis, myocarditis and involvement of the bone marrow but with negative histological results of the small intestine.
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Affiliation(s)
- M Fritz
- Institut für Pathologie und Molekularpathologie, Kanzlerstr. 2-6, 75175, Pforzheim, Deutschland,
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Weiss D, Walach M, Meisner C, Fritz M, Scholten M, Breit S, Plewnia C, Bender B, Gharabaghi A, Wächter T, Krüger R. Nigral stimulation for resistant axial motor impairment in Parkinson's disease? A randomized controlled trial. ACTA ACUST UNITED AC 2013; 136:2098-108. [PMID: 23757762 PMCID: PMC3692032 DOI: 10.1093/brain/awt122] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [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] [Indexed: 12/21/2022]
Abstract
Gait and balance disturbances typically emerge in advanced Parkinson’s disease with generally limited response to dopaminergic medication and subthalamic nucleus deep brain stimulation. Therefore, advanced programming with interleaved pulses was put forward to introduce concomittant nigral stimulation on caudal contacts of a subthalamic lead. Here, we hypothesized that the combined stimulation of subthalamic nucleus and substantia nigra pars reticulata improves axial symptoms compared with standard subthalamic nucleus stimulation. Twelve patients were enrolled in this 2 × 2 cross-over double-blind randomized controlled clinical trial and both the safety and efficacy of combined subthalamic nucleus and substantia nigra pars reticulata stimulation were evaluated compared with standard subthalamic nucleus stimulation. The primary outcome measure was the change of a broad-scaled cumulative axial Unified Parkinson’s Disease Rating Scale score (Scale II items 13–15, Scale III items 27–31) at ‘3-week follow-up’. Secondary outcome measures specifically addressed freezing of gait, balance, quality of life, non-motor symptoms and neuropsychiatric symptoms. For the primary outcome measure no statistically significant improvement was observed for combined subthalamic nucleus and substantia nigra pars reticulata stimulation at the ‘3-week follow-up’. The secondary endpoints, however, revealed that the combined stimulation of subthalamic nucleus and substantia nigra pars reticulata might specifically improve freezing of gait, whereas balance impairment remained unchanged. The combined stimulation of subthalamic nucleus and substantia nigra pars reticulata was safe, and of note, no clinically relevant neuropsychiatric adverse effect was observed. Patients treated with subthalamic nucleus and substantia nigra pars reticulata stimulation revealed no ‘global’ effect on axial motor domains. However, this study opens the perspective that concomittant stimulation of the substantia nigra pars reticulata possibly improves otherwise resistant freezing of gait and, therefore, highly warrants a subsequent phase III randomized controlled trial.
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Affiliation(s)
- Daniel Weiss
- German Centre for Neurodegenerative Diseases (DZNE), Tübingen, Germany.
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Weiss D, Walach M, Meisner C, Fritz M, Scholten M, Gharabaghi A, Plewnia C, Breit S, Bender B, Wächter T, Krüger R. Kombinierte Stimulation des Nucleus subthalamicus und der Substantia nigra pars reticulata für Gang-Freezing: Ergebnisse einer randomisierten klinischen Studie. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Reiss N, Fritz M, Karck M, Ruhparwar A. Mitral valve surgery after orthotopic heart transplantation – an effective and safe treatment option. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Takahashi H, Rauch H, Karck M, Fritz M. Surgical conversion early after failed percutaneous repair with the Mitraclip system. Eur J Cardiothorac Surg 2012; 42:1053. [DOI: 10.1093/ejcts/ezs334] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bottero D, Gaillard ME, Basile LA, Fritz M, Hozbor DF. Genotypic and phenotypic characterization of Bordetella pertussis strains used in different vaccine formulations in Latin America. J Appl Microbiol 2012; 112:1266-76. [PMID: 22471652 DOI: 10.1111/j.1365-2672.2012.05299.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIM To characterize Bordetella pertussis vaccine strains in comparison with current circulating bacteria. METHODS AND RESULTS Genomic and proteomic analyses of Bp137 were performed in comparison with other vaccine strains used in Latin America (Bp509 and Bp10536) and with the clinical Argentinean isolate Bp106. Tohama I strain was used as reference strain. Pulse-field gel electrophoresis (PFGE) and pertussis toxin promoter (ptxP) sequence analysis revealed that Bp137 groups with Bp509 in PFGE group III and contains ptxP2 sequence. Tohama I (group II) and Bp10536 (group I) contain ptxP1 sequence, while Bp106 belongs to a different PFGE cluster and contains ptxP3. Surface protein profiles diverged in at least 24 peptide subunits among the studied strains. From these 24 differential proteins, Bp10536 shared the expression of ten proteins with Tohama I and Bp509, but only three with Bp137. In contrast, seven proteins were detected exclusively in Bp137 and Bp106. CONCLUSIONS Bp137 showed more features in common with the clinical isolate Bp106 than the other vaccine strains here included. SIGNIFICANCE AND IMPACT OF THE STUDY The results presented show that the old strains included in vaccines are not all equal among them. These findings together with the data of circulating bacteria should be taken into account to select the best vaccine to be included in a national immunization programme.
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Affiliation(s)
- D Bottero
- Laboratorio VacSal, Instituto de Biotecnología y Biología Molecular, CONICET - Departamento de Ciencias Biológicas, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
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Bonrath E, Rijcken E, Fritz M, Weber B, Senninger N, Grantcharov T. Laparoscopic Simulation Training? Does Timing Impact the Quality of Skills Acquisition? J Surg Res 2012. [DOI: 10.1016/j.jss.2011.11.080] [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: 10/14/2022]
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Weiss D, Wächter T, Meisner C, Fritz M, Gharabaghi A, Plewnia C, Breit S, Krüger R. Combined STN/SNr-DBS for the treatment of refractory gait disturbances in Parkinson's disease: study protocol for a randomized controlled trial. Trials 2011; 12:222. [PMID: 21989388 PMCID: PMC3205029 DOI: 10.1186/1745-6215-12-222] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 10/11/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Severe gait disturbances in idiopathic Parkinson's disease (PD) are observed in up to 80% of all patients in advanced disease stages with important impact on quality of life. There is an unmet need for further symptomatic therapeutic strategies, particularly as gait disturbances generally respond unfavourably to dopaminergic medication and conventional deep brain stimulation of the subthalamic nucleus in advanced disease stages. Recent pathophysiological research pointed to nigro-pontine networks entrained to locomotor integration. Stimulation of the pedunculopontine nucleus is currently under investigation, however, hitherto remains controversial. The substantia nigra pars reticulata (SNr)--entrained into integrative locomotor networks--is pathologically overactive in PD. High-frequent stimulation of the substantia nigra pars reticulata preferentially modulated axial symptoms and therefore is suggested as a novel therapeutic candidate target for neuromodulation of refractory gait disturbances in PD. METHODS 12 patients with idiopathic Parkinson's disease and refractory gait disturbances under best individual subthalamic nucleus stimulation and dopaminergic medication will be enroled into this double-blind 2 × 2 cross-over clinical trial. The treatment consists of two different stimulation settings using (i) conventional stimulation of the subthalamic nucleus [STNmono] and (ii) combined stimulation of distant electrode contacts located in the subthalamic nucleus and caudal border zone of STN and substantia nigra pars reticulata [STN+SNr]. The primary outcome measure is the change of the cumulative 'axial score' (UPDRS II items '13-15' and UPRDS III items '27-31') at three weeks of constant stimulation in either condition. Secondary outcome measures include specific scores on freezing of gait, balance function, quality of life, non-motor symptoms, and neuropsychiatric symptoms. The aim of the present trial is to investigate the efficacy and safety of a three week constant combined stimulation on [STN+SNr] compared to [STNmono]. The results will clarify, whether stimulation on nigral contacts additional to subthalamic stimulation will improve therapeutic response of otherwise refractory gait disturbances in PD. TRIAL REGISTRATION The trial was registered with the clinical trials register of http://www.clinicaltrials.gov (NCT01355835).
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Affiliation(s)
- Daniel Weiss
- German Centre of Neurodegenerative Diseases, Tübingen, Germany
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Maurer J, Fritz M, Mees ST, Brüwer M, Senninger N, Haier J, Köhler G, Hummel R. Immunhistochemische Expressionsanalysen zur Evaluation potentieller neuer Molecular-Targeted-Therapie-Ansätze im Platten- und Adenokarzinom des Ösophagus. Zentralbl Chir 2011. [DOI: 10.1055/s-0031-1289101] [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: 10/16/2022]
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Fritz M, Siebenhofer M. Neue Entwicklungen in der Flüssigmembranpermeation mit gestützten Membranen. New Developments in Liquid Membrane Permeation with Support Layers. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201000080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Fritz M, Noll H, Siebenhofer M. Kompositstützmembrane in der Flüssigmembranpermeation. CHEM-ING-TECH 2010. [DOI: 10.1002/cite.201050027] [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: 11/09/2022]
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Murray WB, Wood J, Schwab M, Fritz M, Karpa KD. Human Patient Simulation in Pharmacology Graduate Education: Bridging the Bench-to-Bedside Gap. Mol Interv 2010; 10:127-32. [DOI: 10.1124/mi.10.3.2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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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Mazzocchi M, Ragona M, Giorgi L, Schiefer G, Fritz M, Novelli E, Krapp H, Spichtinger D, Poms R. Assessing the socio-economic dimension of food quality and safety regulations: research challenges and recent advances. Quality Assurance and Safety of Crops & Foods 2009. [DOI: 10.1111/j.1757-837x.2009.00033.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Nagel G, Wabitsch M, Galm C, Berg S, Brandstetter S, Fritz M, Klenk J, Peter R, Prokopchuk D, Steiner R, Stroth S, Wartha O, Weiland SK, Steinacker J. Secular changes of anthropometric measures for the past 30 years in South-West Germany. Eur J Clin Nutr 2009; 63:1440-3. [DOI: 10.1038/ejcn.2009.86] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Fritz M, Noll H, Siebenhofer M. Apparatekonstruktion in der Flüssigmembranpermeation mit gestützten Membranen. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950540] [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]
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Schieder D, Faulstich M, Witzelsperger J, Fritz M, Haselbeck S, Remmele E. Nachhaltige Erzeugung von Bioethanol aus Zuckerhirse in Deutschland. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950429] [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: 11/06/2022]
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Fritz M, Noll H, Siebenhofer M. Randbedingungen für die industrielle Anwendung der Flüssigmembranpermeation mit gestützten Membranen. CHEM-ING-TECH 2009. [DOI: 10.1002/cite.200950640] [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]
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Germing A, Fritz M, Lawo T, Bojara W, Mügge A, Laczkovics A, Lindstaedt M. Hybrid revascularization for acute myocardial infarction complicated by cardiogenic shock: left main coronary artery recanalization as a bridging procedure. Minerva Cardioangiol 2008; 56:704-706. [PMID: 19092747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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Fritz M. [Doping in mass sport--what the family doctor needs to know]. MMW Fortschr Med 2008; 150:39-41. [PMID: 19130730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Affiliation(s)
- M Fritz
- Allgemeinmedizin/Sportmedizin, Viersen.
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Al-Batran SE, Hartmann J, Hofheinz R, Homann N, Rethwisch V, Probst S, Stoehlmacher J, Clemens M, Mahlberg R, Fritz M, Seipelt G, Sievert M, Pauligk C, Atmaca A, Jäger E. Biweekly fluorouracil, leucovorin, oxaliplatin, and docetaxel (FLOT) for patients with metastatic adenocarcinoma of the stomach or esophagogastric junction: a phase II trial of the Arbeitsgemeinschaft Internistische Onkologie. Ann Oncol 2008; 19:1882-7. [DOI: 10.1093/annonc/mdn403] [Citation(s) in RCA: 181] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
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Fritz M, Siebenhofer M. Durchströmung poröser Schichten für die Anwendung in der Flüssigmembranpermeation - Stoffaustausch in der stehenden und der durchströmten Zelle. CHEM-ING-TECH 2008. [DOI: 10.1002/cite.200750531] [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: 11/05/2022]
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Fritz M, Rinaldi G. Blood pressure measurement with the tail-cuff method in Wistar and spontaneously hypertensive rats: influence of adrenergic- and nitric oxide-mediated vasomotion. J Pharmacol Toxicol Methods 2008; 58:215-21. [PMID: 18765287 DOI: 10.1016/j.vascn.2008.08.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2008] [Accepted: 08/04/2008] [Indexed: 11/17/2022]
Abstract
INTRODUCTION Systolic blood pressure (SBP) is still measured in rats by the tail-cuff method, allowing readings when pulse/flow disappears during cuff inflation and reappears during deflation, separated by a compression interval. Although cuff deflation is habitually used to estimate SBP, we found cuff deflation-cuff inflation pressure to be usually negative, indicating that cuff deflation pressure < cuff inflation pressure. METHODS SBP was measured in 226 male Wistar and SHR utilizing compression intervals of different durations, and also pharmacological interventions intended to modulate the cuff deflation-cuff inflation cycle. Direct, simultaneous intravascular measurements were also performed in some animals. RESULTS AND DISCUSSION With compression interval congruent with 15 s, cuff deflation-cuff inflation was--6 +/- 0.6 mmHg in 73 Wistar and--6 +/- 1.4 mmHg in 51 SHR. Lengthening compression interval up to 4 min increased cuff deflation-cuff inflation pressure significantly to--27 +/- 3 mmHg in Wistar and to - 31 +/- 5 mmHg in SHR, suggesting accumulation of a vasodilating mediator. This increase of cuff deflation-cuff inflation pressure was prevented by papaverine (totally in Wistar, partially in SHR), indicating its dependence on vasodilatory capacity. Adrenergic blockade decreased cuff deflation-cuff inflation pressure to--13 +/- 5 mmHg (P < 0.05) in SHR, but had no effect in Wistar rats. Injection of L-NAME decreased cuff deflation-cuff inflation pressure to--5 +/- 2 mmHg (P < 0.05) in Wistar rats but was ineffective in SHR. Simultaneous measurements by tail-cuff method and carotid cannulation revealed that the cuff inflation most accurately estimated the intravascular SBP. CONCLUSIONS 1) Cuff inflation measurements should be considered representative of SBP, as cuff deflation can underestimate SBP depending on compression interval duration, 2) nitric oxide accumulation due to flow deprivation is the main cause of SBP underestimation by cuff deflation in Wistar, and 3) in SHR, nitric oxide effects were minimal, and sympathetic activation plus physical factors seemed to predominate in the determining the outcome of measurements.
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Affiliation(s)
- M Fritz
- Facultad de Ciencias Exactas, Departamento de Ciencias Biológicas, Universidad Nacional de La Plata, Argentina
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Germing A, Lindstaedt M, Holt S, Reber D, Mügge A, Laczkovics A, Fritz M. Patient-prosthesis mismatch and left ventricular remodelling after implantation of Shelhigh SuperStentless aortic valve prostheses. J Cardiovasc Surg (Torino) 2008; 49:539-543. [PMID: 18665119] [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: 05/26/2023]
Abstract
AIM Aortic valve replacement is a standard procedure for the treatment of severe aortic valve stenosis. Due to lower flow velocities stentless valves are associated with a more effective regression of left ventricular hypertrophy in comparison to stented valves. However, mismatch between body surface area and valve size supports unfavourable hemodynamic results. The aim of the study was to analyze hemodynamic parameters by echocardiography after implantation of the Shelhigh SuperStentless bioprosthesis and to analyze the occurrence of patient-prosthesis mismatch and left ventricular remodelling in this specific valve type. METHODS A total of 20 patients with severe aortic stenosis underwent implantation of a Shelhigh Super Stentless prosthesis. Clinical and echocardiographic assessment was done prior to, immediate after and six months after surgery. RESULTS All surgical procedures were successful, no surgery-related complication was documented perioperatively. One patient died after development of multiorgan failure. Echocardiography during the first eight days after surgery showed mean gradients of 16 mmHg, mean valve orifice areas of 1.8 cm(2) and indexed effective orifice areas at 0.95 cm(2)/m(2). Six-months follow-up data were obtained in 19/20 patients. There were no relevant changes in echocardiographic hemodynamic findings at the time of follow-up measurements. Significant regression of left ventricular hypertrophy was shown (P=0.0088). A patient-prosthesis mismatch occurred in one patient (0.54 cm(2)/m(2)). No recurrent symptoms were documented. CONCLUSION Patient-prosthesis mismatch after implantation of SuperStentless Shelhigh prosthesis is rare. A significant regression of left ventricular hypertrophy could be shown after six months. Hemodynamic valve function assessed by echocardiography may be predicted early after surgery.
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Affiliation(s)
- A Germing
- Cardiology and Angiology Medical Clinic II, University Hospital Bergmannsheil, Bochum, Germany.
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Ameseder C, Meixner O, Haas R, Fritz M, Schiefer G. Measurement of the importance of trust elements in agrifood chains: an application of the analytic hierarchy process. ACTA ACUST UNITED AC 2008. [DOI: 10.3920/jcns2008.x097] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
This paper focuses on the level of inter-organizational trust-building elements in food chains of different countries. It is based on a theoretical typology of trust elements, developed and tested for an early stage of business to business (B2B) relationships. In a planned study, required data will be collected via qualitative expert interviews. The importance of trust elements will be measured by applying the analytic hierarchy process (AHP). The study will contribute to understanding the influence of cultural background and single key informants on inter-organizational trust. Results will be useful for the implementation of trust elements in B2B e-business applications.
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Affiliation(s)
- Christoph Ameseder
- Institute of Marketing & Innovation, University of Natural Resources and Applied Life Sciences Vienna, Feistmantelstr. 4, A-1180 Vienna, Austria
| | - Oliver Meixner
- Institute of Marketing & Innovation, University of Natural Resources and Applied Life Sciences Vienna, Feistmantelstr. 4, A-1180 Vienna, Austria
| | - Rainer Haas
- Institute of Marketing & Innovation, University of Natural Resources and Applied Life Sciences Vienna, Feistmantelstr. 4, A-1180 Vienna, Austria
| | - Melanie Fritz
- Department of Food and Resource Economics, University of Bonn, Germany
| | - Gerhard Schiefer
- Department of Food and Resource Economics, University of Bonn, Germany
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Fritz M, Khargi K, Voss D, Lawo T, Mügge A, Lemke B, Laczkovics A, Deneke T. Long-term outcome of intraoperative ablation of permanent atrial fibrillation. Thorac Cardiovasc Surg 2008. [DOI: 10.1055/s-2008-1037682] [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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Abstract
The paper proposes the idea that trust-based relationships can be established within the specific governance structures chosen by the agents. The theoretical background of this paper spans the literature from transaction cost and contract theory to supplier relationship management and trust theory. First communication and experience, risk perception attitude and the trade-off between trust and control are discussed within the analysis of trust source factors. Then these elements are considered in the light of Transaction Cost Economics. Three case studies are then presented in order to corroborate the theoretical proposition.
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Affiliation(s)
- Melanie Fritz
- Department for Food and Resource Economics, Chair for Business Management, Organization and Information Management, University of Bonn, Meckenheimer Allee 174, D-53115, Bonn, Germany
| | - Gaetano Martino
- Deptartment of Agricultural Economics and Food Sciences, University of Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy
| | - Giulio Surci
- Deptartment of Agricultural Economics and Food Sciences, University of Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy
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Deneke T, Khargi K, Lemke B, Lawo T, Lindstaedt M, Germing A, Brodherr T, Bosche L, Mugge A, Laczkovics A, Grewe PH, Fritz M. Intra-operative cooled-tip radiofrequency linear atrial ablation to treat permanent atrial fibrillation. Eur Heart J 2007; 28:2909-14. [DOI: 10.1093/eurheartj/ehm397] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fritz M, Siebenhofer M, Marr R. Flüssig/Flüssig-Extraktion mit chemischer Reaktion, Lösungsmittel als osmotische Senke. CHEM-ING-TECH 2007. [DOI: 10.1002/cite.200750378] [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: 11/06/2022]
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Al-Batran S, Hartmann JT, Hofheinz R, Mahlberg R, Homann N, Probst S, Stoehlmacher J, Fritz M, Rethwisch V, Seipelt G, Jäger E. Modified FOLFOX in combination with docetaxel for patients with metastatic adenocarcinoma of the stomach or gastroesophageal junction: A multicenter phase II study of the Arbeitsgemeinschaft Internistische Onkologie (AIO). J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.4545] [Citation(s) in RCA: 5] [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] [Indexed: 11/20/2022] Open
Abstract
4545 Background: The combination of docetaxel, cisplatin, and fluorouracil (DCF) is clearly superior to CF in the treatment of patients (pts) with advanced gastric cancer (AGC). DCF is, however, associated with significant toxicity, including neutropenia, febrile neutropenia, diarrhea and mucositis. This study evaluated a biweekly, oxaliplatin-based modification of DCF. Methods: Pts with measurable, locally advanced or metastatic adenocarcinoma of the stomach or GE-junction and no prior chemotherapy received mFOLFOX (oxaliplatin 85 mg/sqm, leucovorin 200 mg/sqm, and fluorouracil 2.6 g/sqm via 24hr infusion) in combination with docetaxel 50 mg/sqm on day 1 every 2 weeks (FLOT-regimen). Prophylactic G-CSF was not administered. Overall response rate (RR) was the primary endpoint (power 80% to detect a RR of >40%) and toxicity profile the main secondary endpoint. The study was externally monitored according to GCP and data were reviewed by an independent safety board. Results: 59 pts (male, 41; female, 18) were enrolled. At the time of analysis, 53 pts were evaluable for toxicity and 51 pts for response. Median age was 60 (range, 29–76), median ECOG PS was 1, and almost all (93%) pts had metastatic disease. Of 51 pts, 2 had a CR and 25 pts attained a PR, adding to an overall RR of 53% (ITT-analysis). Stable disease was observed in 12 (23.5%) and progressive disease in 6 (11.8%) pts. Six (11.8%) pts were not evaluable for response. NCI-CTC grade 3 or 4 hematologic toxicity included leukopenia in 12 (22.6%), neutropenia in 23 (43%), and anemia in 2 (3.8%) pts. Febrile neutropenia was observed in 1 (1.9%) pt only. Other grade 3 or 4 toxicities included peripheral neuropathy in 4 (7.5%), nausea in 3 (5.7%), vomiting in 2 (3.8%) as well as diarrhea and fatigue in 5 (9.4%) pts each. No treatment related deaths were observed. Conclusions: FLOT is active and has a favorable toxicity profile in the treatment of pts with AGC. It may show activity also in perioperative treatment settings and may be considered as a useful treatment option for elderly pts. Survival data will be presented at the meeting. [Table: see text]
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Affiliation(s)
- S. Al-Batran
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - J. T. Hartmann
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - R. Hofheinz
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - R. Mahlberg
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - N. Homann
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - S. Probst
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - J. Stoehlmacher
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - M. Fritz
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - V. Rethwisch
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - G. Seipelt
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
| | - E. Jäger
- Krankenhaus Nordwest, Frankfurt, Germany; Universitätsklinik, Tübingen, Germany; Universitätsklinik, Mannheim, Germany; Klinikum Mutterhaus der Borromäerinnen, Trier, Germany; Universitätsklinik, Lübeck, Germany; Städtische Kliniken, Bielefeld, Germany; Universitätsklinik, Dresden, Germany; Krankenhaus Bad Cannstatt, Stuttgart, Germany; Katholisches Krankenhaus, Hagen, Germany; Onkologische Praxis, Bad Soden, Germany
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Ting L, Partovi N, Fritz M, Riggs K, Levy R, Imai C, Ignaszewski A, Ensom M. 472: Predictors of mycophenolate mofetil adverse effects in thoracic transplant recipients. J Heart Lung Transplant 2007. [DOI: 10.1016/j.healun.2006.11.495] [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: 11/30/2022] Open
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Reber D, Fritz M, Bojara W, Marks P, Laczkovics A, Tossios P. Aortic valve replacement after previous coronary artery bypass grafting: experience with a simplified approach. J Cardiovasc Surg (Torino) 2007; 48:73-7. [PMID: 17308525] [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: 05/14/2023]
Abstract
AIM Aortic valve replacement (AVR) after previous coronary artery bypass grafting (CABG), particularly in a patent left internal thoracic artery (ITA), is a challenge. Avoidance of injuring the patent graft and ensuring myocardial protection are important issues in the management of these patients. The aim of this study was to evaluate a simplified surgical approach to these reoperations. METHODS Between January 2003 and June 2005, 19 of 287 AVRs performed at our institution were in a patient subset (mean age 70 years, range: 62-82) who received AVR after previous CABG surgery. The aortic valve gradients were between 50 and 107 mm Hg. Our operation strategy followed the KIS-principle (keep it simple): both femoral vessels were cannulated using the Seldinger technique. Only the area around the ascending aorta and the right atrium was dissected to permit x-clamping, aortotomy, and catheterization for retrograde cardioplegia and a left ventricular vent. The anterior aspect of the heart and the left side, where the ITA was embedded and patent, were left untouched and not clamped. RESULTS The mean interval between the first and second operation was 6.5 years. Fourteen patients received biological prostheses. Four patients received an additional surgery at the time of AVR. The mean operating time was 267 min; the mean AoX-clamp time was 63 min. One patient died because of severe heart failure. In all others the postoperative course was uneventful. CONCLUSIONS We believe that the indication for AVR in patients scheduled for CABG should be re-evaluated. In those in which Redo-surgery for new or increased valve stenosis is indicated, a simple and safe surgical option is presented.
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Affiliation(s)
- D Reber
- Department of Cardiothoracic Surgery, Bergmannsheil Bochum Ruhr-University Hospital Bochum, Germany.
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