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Ziegengeist T, Orth J, Kroll K, Schneider M, Spindler N, Dimova D, Handschuh S, Brandenburg A, Ossola R, Furtmann N, Birkenfeld J, Beil C, Hoffmann D, Schmidt T, Sendak R, Fischer M, Hölper S, Kühn J. High-Throughput and Format-Agnostic Mispairing Assay for Multispecific Antibodies Using Intact Mass Spectrometry. Anal Chem 2023. [PMID: 37369001 DOI: 10.1021/acs.analchem.3c00742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2023]
Abstract
Multispecific antibodies have gained significant importance in a broad indication space due to their ability to engage multiple epitopes simultaneously and to thereby overcome therapeutic barriers. With growing therapeutic potential, however, the molecular complexity increases, thus intensifying the demand for innovative protein engineering and analytical strategies. A major challenge for multispecific antibodies is the correct assembly of light and heavy chains. Engineering strategies exist to stabilize the correct pairing, but typically individual engineering campaigns are required to arrive at the anticipated format. Mass spectrometry has proven to be a versatile tool to identify mispaired species. However, due to manual data analysis procedures, mass spectrometry is limited to lower throughputs. To keep pace with increasing sample numbers, we developed a high-throughput-capable mispairing workflow based on intact mass spectrometry with automated data analysis, peak detection, and relative quantification using Genedata Expressionist. This workflow is capable of detecting mispaired species of ∼1000 multispecific antibodies in three weeks and thus is applicable to complex screening campaigns. As a proof of concept, the assay was applied to engineering a trispecific antibody. Strikingly, the new setup has not only proved successful in mispairing analysis but has also revealed its potential to automatically annotate other product-related impurities. Furthermore, we could confirm the assay to be format-agnostic, as shown by analyzing several different multispecific formats in one run. With these comprehensive capabilities, the new automated intact mass workflow can be applied as a universal tool to detect and annotate peaks in a format-agnostic approach and in high-throughput, thus enabling complex discovery campaigns.
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Affiliation(s)
- Tanja Ziegengeist
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Jennifer Orth
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Katja Kroll
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Marion Schneider
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Nadja Spindler
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Dilyana Dimova
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Severin Handschuh
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | | | | | - Norbert Furtmann
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Joerg Birkenfeld
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
- Perspix Biotech GmbH FiZ Frankfurt Innovation Center Biotechnology, Frankfurt 60438, Germany
| | - Christian Beil
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Dietmar Hoffmann
- Large Molecules Research Platform, Sanofi, Cambridge, Massachusetts 02141, United States
| | - Thorsten Schmidt
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Rebecca Sendak
- Large Molecules Research Platform, Sanofi, Cambridge, Massachusetts 02141, United States
| | - Melanie Fischer
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Soraya Hölper
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
| | - Jennifer Kühn
- Large Molecules Research Platform, Sanofi-Aventis Deutschland GmbH, Frankfurt 65926, Germany
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Nowakowska J, Cameron DR, De Martino A, Kühn J, Le Fresne-Languille S, Leuillet S, Amouzou Y, Wittke F, Carton T, Le Vacon F, Chaves RL, Nicolas-Metral V, Vuagniaux G. Evaluation of the microbiota-sparing properties of the anti-staphylococcal antibiotic afabicin. J Antimicrob Chemother 2023:7192828. [PMID: 37294305 PMCID: PMC10393889 DOI: 10.1093/jac/dkad181] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Accepted: 05/23/2023] [Indexed: 06/10/2023] Open
Abstract
BACKGROUND Antibiotic use is associated with collateral damage to the healthy microbiota. Afabicin is a first-in-class prodrug inhibitor of the FabI enzyme that, when converted to the pharmacologically active agent afabicin desphosphono, demonstrates a staphylococcal-specific spectrum of activity. An expected benefit of highly targeted antibiotics such as afabicin is microbiome preservation. OBJECTIVES To compare the effects of oral treatment with afabicin and standard-of-care antibiotics upon the murine gut microbiota, and to assess the effects of oral afabicin treatment on the human gut microbiota. METHODS Gut microbiota effects of a 10 day oral course of afabicin treatment were monitored in mice and compared with clindamycin, linezolid and moxifloxacin at human-equivalent dose levels using 16S rDNA sequencing. Further, the gut microbiota of healthy volunteers was longitudinally assessed across 20 days of oral treatment with afabicin 240 mg twice daily. RESULTS Afabicin treatment did not significantly alter gut microbiota diversity (Shannon H index) or richness (rarefied Chao1) in mice. Only limited changes to taxonomic abundances were observed in afabicin-treated animals. In contrast, clindamycin, linezolid and moxifloxacin each caused extensive dysbiosis in the murine model. In humans, afabicin treatment was not associated with alterations in Shannon H or rarefied Chao1 indices, nor relative taxonomic abundances, supporting the findings from the animal model. CONCLUSIONS Oral treatment with afabicin is associated with preservation of the gut microbiota in mice and healthy subjects.
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Affiliation(s)
- J Nowakowska
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - D R Cameron
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - A De Martino
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - J Kühn
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - S Le Fresne-Languille
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - S Leuillet
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - Y Amouzou
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - F Wittke
- Clinical Development Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - T Carton
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - F Le Vacon
- Research and Development Department, Biofortis SAS, 3 route de la Chatterie, 44800 Saint-Herblain, France
| | - R L Chaves
- Clinical Development Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - V Nicolas-Metral
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
| | - G Vuagniaux
- Translational Medicine Department, Debiopharm International SA, Chemin Messidor 5-7, 1006 Lausanne, Switzerland
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Wurm A, Kühn J, Kugel K, Putzer D, Arora R, Coraça-Huber DC, Zelger P, Badzoka J, Kappacher C, Huck CW, Pallua JD. Raman microscopic spectroscopy as a diagnostic tool to detect Staphylococcus epidermidis in bone grafts. Spectrochim Acta A Mol Biomol Spectrosc 2022; 280:121570. [PMID: 35779474 DOI: 10.1016/j.saa.2022.121570] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/02/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
INTRODUCTION Raman microscopic spectroscopyis a new approach for further characterization and detection of molecular features in many pathological processes. This technique has been successfully applied to scrutinize the spatial distribution of small molecules and proteins within biological systems by in situ analysis. This study uses Raman microscopic spectroscopyto identify any in-depth benefits and drawbacks in diagnosing Staphylococcus epidermidis in human bone grafts. MATERIAL AND METHODS 40 non-infected human bone samples and 10 human bone samples infected with Staphylococcus epidermidis were analyzed using Raman microscopic spectroscopy. Reflectance data were collected between 200 cm-1 and 3600 cm-1 with a spectral resolution of 4 cm-1 using a Senterra II microscope (Bruker, Ettlingen, Germany). The acquired spectral information was used for spectral and unsupervised classification, such as principal component analysis. RESULTS Raman measurements produced distinct diagnostic spectra that were used to distinguish between non-infected human bone samples and Staphylococcus epidermidis infected human bone samples by spectral and principal component analyses. A substantial loss in bone quality and protein conformation was detected by human bone samples co-cultured with Staphylococcus epidermidis. The mineral-to-matrix ratio using the phosphate/Amide I ratio (p = 0.030) and carbonate/phosphate ratio (p = 0.001) indicates that the loss of relative mineral content in bones upon bacterial infection is higher than in non-infected human bones. Also, an increase of alterations in the collagen network (p = 0.048) and a decrease in the structural organization and relative collagen in infected human bone could be detected. Subsequent principal component analyses identified Staphylococcus epidermidis in different spectral regions, respectively, originating mainly from CH2 deformation (wagging) of protein (at 1450 cm-1) and bending and stretching modes of C-H groups (∼2800-3000 cm-1). CONCLUSION Raman microscopic spectroscopyis presented as a promising diagnostic tool to detect Staphylococcus epidermidis in human bone grafts. Further studies in human tissues are warranted.
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Affiliation(s)
- A Wurm
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - J Kühn
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - K Kugel
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - D Putzer
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - R Arora
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - D C Coraça-Huber
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria
| | - P Zelger
- University Clinic for Hearing, Voice and Speech Disorders, Medical University of Innsbruck, Anichstrasse 35, Innsbruck, Austria
| | - J Badzoka
- Institute of Analytical Chemistry and Radiochemistry, Innsbruck, Austria
| | - C Kappacher
- Institute of Analytical Chemistry and Radiochemistry, Innsbruck, Austria
| | - C W Huck
- Institute of Analytical Chemistry and Radiochemistry, Innsbruck, Austria
| | - J D Pallua
- University Hospital for Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstraße 35, 6020, Innsbruck, Austria.
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Capelo HL, Kühn J, Pommerol A, Piazza D, Brändli M, Cerubini R, Jost B, Bodénan JD, Planchet T, Spadaccia S, Schräpler R, Blum J, Schönbächler M, Mayer L, Thomas N. TEMPus VoLA: The timed Epstein multi-pressure vessel at low accelerations. Rev Sci Instrum 2022; 93:104502. [PMID: 36319368 DOI: 10.1063/5.0087030] [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] [Received: 01/31/2022] [Accepted: 08/07/2022] [Indexed: 06/16/2023]
Abstract
The field of planetary system formation relies extensively on our understanding of the aerodynamic interaction between gas and dust in protoplanetary disks. Of particular importance are the mechanisms triggering fluid instabilities and clumping of dust particles into aggregates, and their subsequent inclusion into planetesimals. We introduce the timed Epstein multi-pressure vessel at low accelerations, which is an experimental apparatus for the study of particle dynamics and rarefied gas under micro-gravity conditions. This facility contains three experiments dedicated to studying aerodynamic processes: (i) the development of pressure gradients due to collective particle-gas interaction, (ii) the drag coefficients of dust aggregates with variable particle-gas velocity, and (iii) the effect of dust on the profile of a shear flow and resultant onset of turbulence. The approach is innovative with respect to previous experiments because we access an untouched parameter space in terms of dust particle packing fraction, and Knudsen, Stokes, and Reynolds numbers. The mechanisms investigated are also relevant for our understanding of the emission of dust from active surfaces, such as cometary nuclei, and new experimental data will help interpreting previous datasets (Rosetta) and prepare future spacecraft observations (Comet Interceptor). We report on the performance of the experiments, which has been tested over the course of multiple flight campaigns. The project is now ready to benefit from additional flight campaigns, to cover a wide parameter space. The outcome will be a comprehensive framework to test models and numerical recipes for studying collective dust particle aerodynamics under space-like conditions.
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Affiliation(s)
- H L Capelo
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - J Kühn
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - A Pommerol
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - D Piazza
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - M Brändli
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - R Cerubini
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - B Jost
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - J-D Bodénan
- ETH Zurich, Institute of Geochemistry and Petrology, 8092 Zurich, Switzerland
| | - T Planchet
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - S Spadaccia
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
| | - R Schräpler
- Institut fur Geophysik und extraterrestrische Physik, Technische Universitat Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
| | - J Blum
- Institut fur Geophysik und extraterrestrische Physik, Technische Universitat Braunschweig, Mendelssohnstr. 3, D-38106 Braunschweig, Germany
| | - M Schönbächler
- ETH Zurich, Institute of Geochemistry and Petrology, 8092 Zurich, Switzerland
| | - L Mayer
- Center for Theoretical Astrophysics and Cosmology, Institute for Computational Science, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - N Thomas
- Space Research and Planetary Sciences Division, Physikalisches Institut, University of Bern, Sidlerstrasse 5, CH-3012 Bern, Switzerland
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Schindler C, Faust C, Sjuts H, Lange C, Kühn J, Dittrich W, Leuschner WD, Schiebler W, Hofmann J, Rao E, Langer T. A multivalent antibody assembled from different building blocks using tag/catcher systems: a case study. Protein Eng Des Sel 2022; 35:6826492. [PMID: 36373216 DOI: 10.1093/protein/gzac014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 11/02/2022] [Accepted: 11/08/2022] [Indexed: 11/16/2022] Open
Abstract
The field of therapeutic antibodies and, especially bi- or multispecific antibodies, is growing rapidly. Especially for treating cancers, multispecific antibodies are very promising, as there are multiple pathways involved and multispecific antibodies offer the possibility to interfere at two or more sites. Besides being used as therapeutic, multispecific antibodies can be helpful tools in basic research. However, the design and choice of the most appropriate multispecific antibody format are far from trivial. The generation of multispecific antibodies starts with the generation of antibodies directed against the desired targets and then combining the different antigen-binding sites in one molecule. This is a time-consuming and laborious approach since the most suitable geometry cannot be predicted. The SpyTag technology is based on a split-protein system, where a small peptide of said protein, the SpyTag, can bind to the remaining protein, the SpyCatcher. An irreversible isopeptide bond between the SpyTag and the SpyCatcher is formed. A related Tag-Catcher system is the SnoopTag-SnoopCatcher. These systems offer the opportunity to separately produce proteins fused to the tag-peptides and to the catcher-domains and assemble them in vitro. Our goal was to design and produce different antibody fragments, Fab domains and Fc-containing domains, with different tags and/or catchers as building blocks for the assembly of different multivalent antibodies. We have shown that large multivalent antibodies consisting of up to seven building blocks can be prepared. Binding experiments demonstrated that all binding sites in such a large molecule retained their accessibility to their corresponding antigens.
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Affiliation(s)
- Christof Schindler
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany.,Lonza AG, QC Biologics, Lonzastraße, 3930 Visp, Switzerland
| | - Christine Faust
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Hanno Sjuts
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Christian Lange
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Jennifer Kühn
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Werner Dittrich
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Wulf Dirk Leuschner
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Werner Schiebler
- Provadis School of International Management and Technology AG, Industriepark Höchst, Building B845, Frankfurt am Main 65926, Germany
| | - Joachim Hofmann
- Provadis School of International Management and Technology AG, Industriepark Höchst, Building B845, Frankfurt am Main 65926, Germany
| | - Ercole Rao
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
| | - Thomas Langer
- Sanofi-Aventis Deutschland GmbH, R&D Large Molecules Research, Industriepark Höchst, Frankfurt am Main 65926, Germany
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Langner S, Kromrey M, Kühn J, Grothe M, Domin M. Repeated intravenous administration of gadobutrol does not lead to increased signal intensity on unenhanced T1-weighted images – a voxel-based whole brain analysis. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- S Langner
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - M Kromrey
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - J Kühn
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - M Grothe
- Universitätsmedizin Greifswald, Klinik für Neurologie, Greifswald
| | - M Domin
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Funktionelle Bildgebung, Greifswald
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Kromrey M, Schorn F, Liedtke K, Ittermann T, Kühn J. Akute transiente Dyspnoe: Einfluss der Scanzeit in der arteriellen Phase der Primovist®-verstärkten Leber-MRT. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M Kromrey
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - F Schorn
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - K Liedtke
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - T Ittermann
- Universitätsmedizin Greifswald, Institut für Community Medicine, Greifswald
| | - J Kühn
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
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Kühn J, Schäfer S, Quadrat A, Grabe H, Mensel B, Schulze L, Ittermann T, Hosten N, Kromrey M. Persönlichkeitsprofil und Erfahrung von Interventionsradiologen auf das Ergebnis CT-gestützter perkutaner Lungenbiopsien. ROFO-FORTSCHR RONTG 2017. [DOI: 10.1055/s-0037-1600284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- J Kühn
- Universitätsmedizin, Institu für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - S Schäfer
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - A Quadrat
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - H Grabe
- Universitätsmedizin Greifswald, Institut für Psychiatrie und Psychotherapie, Greifswald
| | - B Mensel
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - L Schulze
- Universitätsmedizin Greifswald, Institut für Psychiatrie und Psychotherapie, Greifswald
| | - T Ittermann
- Universitätsmedizin Greifswald, Institut für Community Medicine, Greifswald
| | - N Hosten
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
| | - M Kromrey
- Universitätsmedizin Greifswald, Institut für Diagnostische Radiologie und Neuroradiologie, Greifswald
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Brendle C, Hackmack KF, Kühn J, Wardeh M, Janisch T, Kopp R, Rossaint R, Stollenwerk A, Kowalewski S, Misgeld B, Leonhardt S, Walter M. Continuous gas transfer monitoring during extracorporeal membrane oxygenation. Biomed Signal Process Control 2017. [DOI: 10.1016/j.bspc.2016.08.023] [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: 12/11/2022]
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Mensel B, Kühn J, Wenzel M, Heßelbarth L, Lorbeer R. MRT-basierte Durchmesserbestimmung der Aorta in einer Allgemeinbevölkerung: Referenzwerte und Einfluss von kardiovaskulären Risikofaktoren. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kühn J, Thamm P, Kindermann K, Hadlich S, Hosten N. Die Proton-Density Fettfraktion ein Biomarker für Leberfett. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550886] [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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Mahlke C, Mensel B, Grisk O, Schreiber A, Glitsch A, Hosten N, Kühn J. In vitro Untersuchungen der Wirksamkeit verschiedener Vasodilatatoren zur intraarteriellen Infusionstherapie bei Patienten mit non-okklusiver mesenterialer Ischämie. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1551071] [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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Fülkell P, Langner S, Mahlke C, Plessow B, Hosten N, Kühn J. Geräuschreduzierende Softwarealgorithmen im MRT und deren Einfluss auf die Bildqualität. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550808] [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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Kühn J, Mennesson B, Liewer K, Martin S, Loya F, Millan-gabet R, Serabyn E. EXPLORING INTERMEDIATE (5-40 AU) SCALES AROUND AB AURIGAE WITH THE PALOMAR FIBER NULLER. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/0004-637x/800/1/55] [Citation(s) in RCA: 5] [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: 11/12/2022]
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Bock K, Otto S, Kühn J, Puls R, Rosenberg C, Hosten N, Langner S. Diagnostische Sicherheit und Komplikationsprofil bei CT- gestützten Lungenbiopsien. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252740] [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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16
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Partecke LI, Cziupka K, Kühn J, Rosenberg C, Puls R, v Bernstorff W, Glitsch A, Heidecke CD, Stier A. [Atypical vascular supply from the coeliac trunk. Recurrent bleeding from a duodenal ulcer]. Chirurg 2008; 80:238-40. [PMID: 18820879 DOI: 10.1007/s00104-008-1625-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Hemorrhagic duodenal ulcers should primarily be controlled by endoscopy. In cases of recurrent bleeding or if bleeding cannot be controlled endoscopically, open surgery is the gold standard. Rarely, atypical origin of arteries or additional atypical arteries may lead to further unexpected hemorrhagic recurrences and angiography with surgical intervention is the treatment of choice. In this article a rare case of an atypical visceral artery connecting the coeliac trunk and the gastroduodenal artery leading to recurrent bleeding from a duodenal ulcer is presented.
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Affiliation(s)
- L I Partecke
- Klinik für Allgemeine Chirurgie, Viszeral-, Thorax- und Gefässchirurgie, Ernst-Moritz-Arndt-Universität, Friedrich-Loeffler-Strasse 23b, Greifswald, Germany.
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17
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Kühn J, Puls R, Wallaschowski H, Heidecke C, Rosenberg C, Hosten N. Charakteristik von Koagulationsnekrosen nach laserinduzierter Thermotherapie in der kontrastmittelverstärkten Magnetresonanztomografie und deren Einfluss auf den Therapieerfolg. ROFO-FORTSCHR RONTG 2008; 180:816-20. [DOI: 10.1055/s-2008-1027478] [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: 10/21/2022]
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18
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Vogel T, Vadonis R, Kühn J, Eing BR, Shenninger N, Haier J. Viral reactivation is not related to septic complications after major surgical resections. APMIS 2008; 116:292-301. [PMID: 18397464 DOI: 10.1111/j.1600-0463.2008.00447.x] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Anastomotic leakage and septic complications are the most important determinants of postoperative outcome after major surgical resections. Malignant diseases and surgical trauma can influence immune responses and the ability to react against infectious factors, such as bacteria and viruses. Comparable immune suppression can cause viral reactivation in transplantation and trauma patients. In this prospective study, patients who underwent major surgical resections for oesophageal or pancreatic cancer were investigated for the potential involvement of viral reactivation in the development of septic complications. 86 patients (40 oesophageal resections, 27 pancreatic resections, 19 surgical explorations) were included. Viral antigens, viral DNA, antibodies against viral structures (IgG, IgM, IgA) and, in part, viral cultivation were performed for CMV, EBV, HSV1, HSV2, HZV6 and VZV in serum, urine, sputum and swabs from buccal mucosa preoperatively and at postoperative days 1, 3 and 5. Test results were compared with the postoperative outcome (30-day morbidity, in-hospital mortality) and clinical scores (SOFA, TISS). For statistical analyses Student's t-tests and Chi2-tests were used. The overall complication rate was 19.8% (30-day morbidity) with an in-hospital mortality of 1.2% (1/86 patients). Postoperatively, anti-CMV-IgG titres were significantly reduced (p<0.05) and remained suppressed in patients with septic complications. Anti-CMV-gB-IgG were also reduced, but showed considerable interindividual differences. Anti-CMV-IgA and -IgM did not show significant alterations in the postoperative course. In addition, direct viral detection methods did not support viral reactivation in patients in any of the investigated groups. The reduction of anti-CMV antibodies is likely caused by an immune suppression, specifically by reduced B-cell counts after major surgical interventions. Viral reactivation, however, did not occur in the early postoperative period as a specific risk for septic complications.
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Affiliation(s)
- T Vogel
- Molecular Biology Laboratory, Department of General Surgery, University Hospital Münster, Germany
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19
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Marian A, Charrière F, Colomb T, Montfort F, Kühn J, Marquet P, Depeursinge C. On the complex three-dimensional amplitude point spread function of lenses and microscope objectives: theoretical aspects, simulations and measurements by digital holography. J Microsc 2007; 225:156-69. [PMID: 17359250 DOI: 10.1111/j.1365-2818.2007.01727.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The point spread function is widely used to characterize the three-dimensional imaging capabilities of an optical system. Usually, attention is paid only to the intensity point spread function, whereas the phase point spread function is most often neglected because the phase information is not retrieved in noninterferometric imaging systems. However, phase point spread functions are needed to evaluate phase-sensitive imaging systems and we believe that phase data can play an essential role in the full aberrations' characterization. In this paper, standard diffraction models have been used for the computation of the complex amplitude point spread function. In particular, the Debye vectorial model has been used to compute the amplitude point spread function of x63/0.85 and x100/1.3 microscope objectives, exemplifying the phase point spread function specific for each polarization component of the electromagnetic field. The effect of aberrations on the phase point spread function is then analyzed for a microscope objective used under nondesigned conditions, by developing the Gibson model (Gibson & Lanni, 1991), modified to compute the three-dimensional amplitude point spread function in amplitude and phase. The results have revealed a novel anomalous phase behaviour in the presence of spherical aberration, providing access to the quantification of the aberrations. This work mainly proposes a method to measure the complex three-dimensional amplitude point spread function of an optical imaging system. The approach consists in measuring and interpreting the amplitude point spread function by evaluating in amplitude and phase the image of a single emitting point, a 60-nm-diameter tip of a Near Field Scanning Optical Microscopy fibre, with an original digital holographic experimental setup. A single hologram gives access to the transverse amplitude point spread function. The three-dimensional amplitude point spread function is obtained by performing an axial scan of the Near Field Scanning Optical Microscopy fibre. The phase measurements accuracy is equivalent to lambda/60 when the measurement is performed in air. The method capability is demonstrated on an Achroplan x20 microscope objective with 0.4 numerical aperture. A more complete study on a x100 microscope objective with 1.3 numerical aperture is also presented, in which measurements performed with our setup are compared with the prediction of an analytical aberrations model.
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Affiliation(s)
- A Marian
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Imaging and Applied Optics Institute, Station 17, CH-1015 Lausanne, Switzerland
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20
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Kühn J, Pais I, Hubold C, Hallschmid M, Born J, Fehm HL, Peters A. AMPA receptor antagonist caroverine has no effect on hypoglycaemic counterregulation. Exp Clin Endocrinol Diabetes 2007. [DOI: 10.1055/s-2007-972396] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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21
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Rosenberg C, Kühn J, Puls R, Hegenscheid K, Fröhlich CP, Hosten N. Gd-EOB-DTPA-verstärkte Bildgebung von Lebermetastasen – Vorteile für die MRT-geführte perkutane Tumorablation. ROFO-FORTSCHR RONTG 2007. [DOI: 10.1055/s-2007-976839] [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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22
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Kollertz P, Kühn J, Luttkus A. Intrauterine Therapie und peripartales Management bei fetaler SVT und nachfolgender supraventrikulärer Extrasystolie. Geburtshilfe Frauenheilkd 2006. [DOI: 10.1055/s-2006-952728] [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: 10/20/2022] Open
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23
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Hosten N, Kühn J. Diffuse Leberparenchym-Veränderungen. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867301] [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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24
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Krause R, Kühn J, Penndorf I, Knoll K, Henle T. N-Terminal pyrazinones: a new class of peptide-bound advanced glycation end-products. Amino Acids 2004; 27:9-18. [PMID: 15309567 DOI: 10.1007/s00726-004-0102-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2004] [Accepted: 05/07/2004] [Indexed: 10/26/2022]
Abstract
The reaction of peptide Gly-Ala-Phe with the alpha-dicarbonyl compounds glyoxal and methylglyoxal was studied under physiological conditions (pH=7.4, 37 degrees C). Using HPLC with UV and fluorescence detection, a rapid derivatization of the peptide and the concomitant formation of well-defined products were observed. The products, which showed characteristic UV absorbance (lambda(max)=320 to 340 nm) and fluorescence (lambda(ex)=330 to 340 nm, lambda(em)=395 to 405 nm), were identified by ESI-MS and NMR spectroscopic analysis as the N-terminally pyrazinone-modified peptides I (N-[2-(2-oxo-2H-pyrazin-1-yl)-propyl]-phenylalanine) and II (N-[2-(5-methyl-2-oxo-2H-pyrazin-1-yl)-propionyl]-phenylalanine). Model experiments revealed that the reactivity of the N-termini of peptides towards a derivatization by glyoxal is in the same order of magnitude as that of arginine, which generally is attributed as main target for alpha-dicarbonyl compounds in proteins. Incubation of insulin with glyoxal proved the protein-bound formation of pyrazinones, with the N-terminus of the B-chain as the main target. According to these results, we conclude that N-terminal pyrazinones represent a new type of advanced glycation end-products (AGEs) with significance for biological systems and foods.
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Affiliation(s)
- R Krause
- Institute of Food Chemistry, Technical University of Dresden, Dresden, Germany
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25
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Abstract
Orf of the hand is considered as an uncommon viral infection which is usually acquired through contact with infected sheep and goats. Indirect infections through contaminated knives or meat have been reported. Many authors feel that the disorder is more common than reported because the disease is often misdiagnosed and the course is usually self-limiting with spontaneous healing within several weeks. Diagnosis is mainly made by patient's history and clinical course. It is important to know the benign nature of human orf, since complications seem to be caused by overtreatment.
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Affiliation(s)
- H Rieger
- Klinik für Unfall-, Hand- und Wiederherstellungschirurgie, Clemenshospital, Akademisches Lehrkrankenhaus der Westfälischen Wilhelms-Universität, Münster.
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26
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Kühn J. Virusinfektionen beim Immunsupprimieren. Zeitschrift f�r Herz-, Thorax- und Gef��chirurgie 2002. [DOI: 10.1007/s00398-002-1110-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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27
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von Bary S, Kühn J, Krieger S, Sobala KH. [Vena cava filter--prevention of pulmonary embolism. Report of clinical experiences]. Zentralbl Chir 1999; 124:27-31. [PMID: 10091294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Between 1982 and 1997 inferior vena cava filters were implanted in 182 patients. Indications were recurrent pulmonary embolism, massive embolism and prophylactic use prior to planned high-risk-operations upon patients with thromboembolic complications in shorter history. Kimray-Greenfield, Cardial and Vascor-systems were implanted. Mortality was 0, neither relevant bleedings, nor infections occurred. Vena-cava-filters prevented from re-embolism in 98%. During hospitalisation 3 cases of re-embolism (1.6%) were noticed due to incorrect filter-placement. One patient died (< 1%). Follow-up-examinations were performed in 74 cases 6 to 24 months after implantation. We discovered 8 cases (11%) of filter-migration, 3 cases (4%) of filter-kinking, one case of filter-perforation and one case of filter-shrut-fracture. All these patients remained without clinical sequelae. Cava-thrombosis was found in 2 patients 6 to 24 months after filter-insertion (2.7%). There was no sign of re-embolism in our longterm follow-up. In our opinion the vena cava filter is an effective and safe method to prevent pulmonary re-embolism. Handling is quite easy and filter complications are low. In some elected cases prophylactic use of vena cava filters in high-risk-patients may be indicated.
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Affiliation(s)
- S von Bary
- Klinik für Viszeral-, Gefäss- und Allgemeinchirurgie, Kreiskrankenhaus Marienhöhe, Würselen
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28
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Abstract
Assay of human vitreous specimens obtained postmortem for HIV antibodies, or HIV p24 antigen, is reported to be a reliable technique to demonstrate HIV infection in possible cornea donors from whom serum could not be obtained. We tested three vitreous samples obtained during vitrectomy from two HIV-positive patients. One patient exhibited the clinical AIDS syndrome. HIV antigen and antibody tests were negative in all specimens. HIV proviral DNA was detected by PCR only in the vitreous of the patient with AIDS. Therefore, testing only vitreous samples is insufficient to exclude HIV infection in potential cornea donors.
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Affiliation(s)
- H Mietz
- Department of Ophthalmology, University of Cologne, Köln, Germany
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30
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Hartmann A, Kühn J, Hopf R, Klepzig H, Standke R, Kober G, Maul FD, Hör G, Kaltenbach M. Effect of propranolol and disopyramide on left ventricular function at rest and during exercise in hypertrophic cardiomyopathy. Cardiology 1992; 80:81-8. [PMID: 1611637 DOI: 10.1159/000174983] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In 19 patients with hypertrophic cardiomyopathy (15 males, 4 females, mean age 49.2 +/- 10.8 years) left ventricular function was studied with radionuclide ventriculography at rest and during exercise in a crossover design without intervention and after disopyramide and propranolol treatment. 15 of the 19 patients had a resting or latent intraventricular gradient of more than 30 mm Hg. Left ventricular function at rest and during exercise was evaluated before medication, 90 min after oral administration of 200 mg disopyramide or 160 mg propranolol and after 3 weeks of oral therapy with disopyramide 200 mg 2 times a day or propranolol 80 mg 4 times a day. After long-term treatment with disopyramide, resting ejection fraction decreased from 72 +/- 12 to 69 +/- 14% (p less than 0.01) and peak ejection rate (PER) decreased from 3.46 +/- 135 to 3.24 +/- 65 end-diastolic volume (EDV).s-1 (p less than 0.01). Peak filling rate (PFR) at rest decreased from 3.01 +/- 0.8 to 2.77 +/- 0.63 EDV.s-1 (p less than 0.05). Time to peak filling rate (TPFR) at rest and during exercise after acute and chronic therapy did not change compared to control values. Acute and long-term administration of propranolol lead to a significant reduction in heart rate at rest and during exercise.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- A Hartmann
- Department of Cardiology, Johann Wolfgang Goethe-University, Medical School, Frankfurt, FRG
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31
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Gaab MR, Trost HA, Lorenz M, Seegers K, Heuser D, Fitch W, Baethmann A, Speckmann EJ, Lehmenkühler A, Pöppelmann T, Bingmann D, Rabow L, Bergenheim T, Bålfors E, Urban G, Keplinger F, Kohl F, Kuttner H, Jobst G, Pittner F, Schalkhammer T, Mann-Buxbaum E, Litscher G, Steiler E, Pfurtschcller G, Schwarz G, Hinrichs H, Feistner H, Künkel H, Wieser HG, Isler P, Witztum A, Siegel A, Merles N, Möllmann M, Penner M, Schoeppner H, Hohenberger K, Daub D, Freye E, Grabitz K, Sandmann W, Haass A, Ladurner G, Teasdale G, Weis M, Hilz MJ, Claus D, Neundörfer B, Druschky KF, Litscher G, Pfurtscheller G, Heinze HJ, Künkcl H, Symon L, Cooper G, Rampil IJ, Bosco M, Adducci E, Gualtieri E, Amato A, Lacava E, Mascia A, Bonomo V, Dinkel M, Kamp HD, Schweiger H, Jaksche H, Schwerdtfeger K, Loew F, Rath SA, Klein HJ, Kühn J, Fritz W, Thiel A, Russ W, Hcmpelmann G, Morawetz RF, Schlager A, Lugcr TJ, Vajsar J, Hopkins AJ, Ronen GM, Kuppe H, Porte T, Dannenberger R, Götz C, Adt M, Schmucker P, Landi A, Colombo F, Luca GP, Fornezza U, Benedctti A, Bruno R, Zamparctti N, Engelhardt W, Drösler S, Dierks T, Maurer K, Hecht U, Lehmkuhl P, Pichlmayr I, Cheng-hui L, Shi-ao J, Cheng-hui L, Shi-ao J, Theissen J, Zander J, Moberg D, Bell R, Miller SB, Pohl S, Hühnefeld D, Henries HJ, Jantzen JP, Eberle B, Dick W, Wallenfang T, Fuzes I, Geissler C, Schregel W, Cunitz G, Fomezza U, Volpin L, Zamperetti N, Demo P, Digito A, Barbacini S, Zamperetti N, Lacquaniti L. Abstracts of scientific papers second international symposium on central nervous system monitoring. J Clin Monit Comput 1990. [DOI: 10.1007/bf02828296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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32
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Krüger E, Nitzsche M, Kühn J, Sasse LP, Nitzsche G. [Comments on so-called "chronic" and "therapy refractory" depression]. Psychiatr Neurol Med Psychol (Leipz) 1988; 40:523-31. [PMID: 3237880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The problems of so-called "therapy resistant or chronic" depression has been investigated on own patients of the year 1986, but simply one chronic example could be noticed. Configurations-frequence-analytic research didn't essentially result in significant statements. It is referred to that the frequent occurrence of the so-called "therapy resistant" depressions described by some authors, could be in connection with limited diagnosis inventories and insufficient to the personality orientated therapy regime.
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Affiliation(s)
- E Krüger
- Bezirksnervenklinik Haldensleben
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33
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Hess J, Stemler M, Will H, Schröder CH, Kühn J, Braun R. Frequent detection of antibodies to hepatitis B virus x-protein in acute, chronic and resolved infections. Med Microbiol Immunol 1988; 177:195-205. [PMID: 3047538 DOI: 10.1007/bf00211219] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Recombinant MS2- or beta gal fusion proteins containing parts of hepatitis B virus (HBV) HBx-, HBc-, and HBs-amino acid sequences were expressed in Escherichia coli and were used to screen 96 and 60 serum samples of HBV infected and uninfected patients, respectively, for the corresponding antibodies by immunoblotting. Antibodies against HBx were detected in 20 out of 65 sera of patients with previous resolved HBV-infection, in 3 out of 7 patients with persistent infection, and in 9 out of 24 sera of patients with acute HBV infection. The specificity of the immune reaction was confirmed by competition experiments with MS2- and beta gal-HBx fusion proteins, and by the lack of HBx antibodies in the sera of uninfected patients. Hbs and HBc antibodies were detected less frequently by immunoblotting with recombinant fusion proteins than by a commercial immunoassay. Our results indicate that HBx antibodies are induced early and frequently during HBV infection suggesting that the HBx protein is an early antigenic protein expressed in vivo.
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Affiliation(s)
- J Hess
- Institut für Medizinische Virologie der Universität Heidelberg, Federal Republic of Germany
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34
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Kühn J. [Therapy for chronic pain: MSD syndrome in tense area of occlusion, temporomandibular joint and psyche]. Zahnarztl Mitt 1988; 78:878, 880, 882 passim. [PMID: 3166286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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35
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Abstract
Bgl-II fragments of the genome of Herpes simplex virus type 2 (HSV-2) HG-52 were cloned into the vector p-Neo and were used to screen the complete HSV-2 genome for regions cross-hybridizing with the genome of HEL cells. Most extensive cross-hybridizing activity was observed with a 530 bp SstII subfragment of the viral BamHI G DNA-fragment (contained in Bgl II F), which spans the joint and the viral a-sequence. From a lambda-L47 library, a cellular 15 kb HindIII DNA fragment was subcloned in pBR 322 which contained a 1920 bp SstII subfragment having strong cross-hybridizing activity with the 530 bp Sst II fragment of HSV-2 BamHI G. Within this 1920 bp Sst II fragment the cross-hybridizing activity was confined to a 230 bp Bgl I/Hpa II subfragment. This 230 bp fragment (including the flanking sequences) was analyzed in comparison to the viral a-sequence. Sequence data revealed a (G + C) content of 66% in the cellular and 81% in the viral DNA fragment, which is mainly determined by an extremely (G + C) rich 16-fold direct repeat (DR2) at the 5'-end. The homology between both DNA-fragments varies between 56% and 79% within the L-S inversion region. Both sequences, furthermore, show homology to the human c-myc protooncogene.
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Affiliation(s)
- E Kohler
- Institute for Virus Research, German Cancer Research Center, Heidelberg, Federal Republic of Germany
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36
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Ullmann H, Kühn J. [Varicella zoster virus infection of the central nervous system with symptoms resembling cardiac phobia and schizophrenia]. Nervenarzt 1988; 59:113-7. [PMID: 3362259] [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] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- H Ullmann
- Psychiatrische Klinik, Universität Heidelberg
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37
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Reiser H, Kühn J, Doerr HW, Kirchner H, Munk K, Braun R. Human cytomegalovirus replicates in primary human bone marrow cells. J Gen Virol 1986; 67 ( Pt 12):2595-604. [PMID: 3025341 DOI: 10.1099/0022-1317-67-12-2595] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
As an attempt to elucidate further the pathogenesis of human cytomegalovirus (HCMV) infection the replication of HCMV in primary human bone marrow cells (BMC) has been investigated. It was found that BMC held in culture in general were susceptible to HCMV infection. Compared to human embryonic lung cells, however, the replicative cycle of HCMV AD169 in BMC as determined by the analysis of viral protein and DNA synthesis was delayed and productive virus infection was restricted to a subset of BMC not exceeding 21% of the total cell population. Both of these phenomena may explain the short-term persistence of HCMV in BMC cultures which was observed over 3 months. By experiments with specifically enriched and depleted cell populations and by indirect double immunofluorescence experiments we found that both bone marrow fibroblasts and a subset of bone marrow stem cells supported productive virus infection. The finding that HCMV replicates in early stem cells of the human bone marrow may explain important aspects of the pathogenesis of HCMV infection including the presence of HCMV in peripheral blood leukocytes.
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38
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Hildebrandt G, Kühn J, Wagenfeld HK. The angular dependence of atomic X-ray dispersion corrections. Acta Crystallogr A 1984. [DOI: 10.1107/s0108767384089650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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39
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Kühn J, Wigand R, Hammer HJ, Bruch P, Adrian T. [Laboratory methods for adenoviruses. XI. Determination of hexon and antihexon-IgA in conjunctival secretions using ELISA]. Zentralbl Bakteriol Mikrobiol Hyg A 1984; 257:426-32. [PMID: 6091369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The possibility of a rapid diagnosis of adenovirus conjunctivitis was studied by demonstrating genus-specific adenovirus hexon antigen or antihexon IgA antibodies in conjunctival secretions by an ELISA. Hexon was found in 44% of about 100 patients with adenovirus conjunctivitis, proven by virus isolation, antihexon in 53%, either one or both in 69% of the conjunctival swabs from the acute phase. Hexon was found in the acute phase more frequently, antihexon in the convalescent phase. In patients with conjunctivitis of different etiology no hexon was found, whereas antihexon IgA was found in a few cases.
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40
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Kühn J. [What significance do cephalometric measurements on radiographs of the profile have for reconstructive dentistry in adults?]. Fortschr Kieferorthop 1983; 44:225-42. [PMID: 6576974 DOI: 10.1007/bf01999724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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41
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Abstract
Thirty-four out of 64 faecal samples with adenovirus particles, as seen by electron microscopy, were found to contain adenovirus 40 or 41 by direct isolation and neutralization in Chang's conjunctival cells, mostly within one week. (Ad40 and 41 candidate viruses are serologically related.) 6 other adenovirus species were isolated; 6 samples gave equivocal results, and 18 were negative. A genus-specific ELISA with an antihexon coat yielded positive results in 40 out of 55 samples; the test failed to identify adenovirus antigen in 10 out of 17 specimens, which were found negative by culture. All of them were negative by immunfluorescence of inoculated Chang cell cultures. Hence the failures are probably due to insufficient amount of virus in the samples. The predominance of only two adenovirus species associated with gastroenteritis in children and the ease of cultivating and identifying them should help to elucidate their etiological significance.
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Hofmann D, Kühn J. [Studies on the pathogenic significance of female urogenital trichomoniasis with special reference to its effects of fertitily]. Arch Gynakol 1966; 203:1-19. [PMID: 6014065 DOI: 10.1007/bf00670720] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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