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Aziz I, Kayastha K, Kaltwasser S, Vonck J, Welsch S, Murphy BJ, Kahnt J, Wu D, Wagner T, Shima S, Ermler U. Structural and mechanistic basis of the central energy-converting methyltransferase complex of methanogenesis. Proc Natl Acad Sci U S A 2024; 121:e2315568121. [PMID: 38530900 PMCID: PMC10998594 DOI: 10.1073/pnas.2315568121] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 02/24/2024] [Indexed: 03/28/2024] Open
Abstract
Methanogenic archaea inhabiting anaerobic environments play a crucial role in the global biogeochemical material cycle. The most universal electrogenic reaction of their methane-producing energy metabolism is catalyzed by N 5-methyl-tetrahydromethanopterin: coenzyme M methyltransferase (MtrABCDEFGH), which couples the vectorial Na+ transport with a methyl transfer between the one-carbon carriers tetrahydromethanopterin and coenzyme M via a vitamin B12 derivative (cobamide) as prosthetic group. We present the 2.08 Å cryo-EM structure of Mtr(ABCDEFG)3 composed of the central Mtr(ABFG)3 stalk symmetrically flanked by three membrane-spanning MtrCDE globes. Tetraether glycolipids visible in the map fill gaps inside the multisubunit complex. Putative coenzyme M and Na+ were identified inside or in a side-pocket of a cytoplasmic cavity formed within MtrCDE. Its bottom marks the gate of the transmembrane pore occluded in the cryo-EM map. By integrating Alphafold2 information, functionally competent MtrA-MtrH and MtrA-MtrCDE subcomplexes could be modeled and thus the methyl-tetrahydromethanopterin demethylation and coenzyme M methylation half-reactions structurally described. Methyl-transfer-driven Na+ transport is proposed to be based on a strong and weak complex between MtrCDE and MtrA carrying vitamin B12, the latter being placed at the entrance of the cytoplasmic MtrCDE cavity. Hypothetically, strongly attached methyl-cob(III)amide (His-on) carrying MtrA induces an inward-facing conformation, Na+ flux into the membrane protein center and finally coenzyme M methylation while the generated loosely attached (or detached) MtrA carrying cob(I)amide (His-off) induces an outward-facing conformation and an extracellular Na+ outflux. Methyl-cob(III)amide (His-on) is regenerated in the distant active site of the methyl-tetrahydromethanopterin binding MtrH implicating a large-scale shuttling movement of the vitamin B12-carrying domain.
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Affiliation(s)
- Iram Aziz
- Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Kanwal Kayastha
- Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Susann Kaltwasser
- Central Electron Microscopy Facility, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Janet Vonck
- Structural Biology, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Sonja Welsch
- Central Electron Microscopy Facility, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Bonnie J. Murphy
- Redox and Metalloprotein Research Group, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Jörg Kahnt
- Max Planck Institute for Terrestrial Microbiology, MarburgD-35043, Germany
| | - Di Wu
- Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, BremenD-28359, Germany
| | - Seigo Shima
- Max Planck Institute for Terrestrial Microbiology, MarburgD-35043, Germany
| | - Ulrich Ermler
- Molecular Membrane Biology, Max Planck Institute of Biophysics, Frankfurt am MainD-60438, Germany
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2
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Wagner T, Kamel W, Stier R, Persigehl T, Datta R, Bruns C, Stippel D, Thomas M. [Differential diagnosis of chronic abdominal pain-Incidental finding of a conspicuous liver lesion in a 15-year-old girl with abdominal pain]. Chirurgie (Heidelb) 2024; 95:235-237. [PMID: 38165449 PMCID: PMC10879336 DOI: 10.1007/s00104-023-02009-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/17/2023] [Indexed: 01/03/2024]
Affiliation(s)
- Tristan Wagner
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland
| | - Wasim Kamel
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland.
| | - Raphael Stier
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland
| | - Thorsten Persigehl
- Institut für Diagnostische und Interventionelle Radiologie, Universitätsklinikum Köln, Köln, Deutschland
| | - Rabi Datta
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland
| | - Christiane Bruns
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland
| | - Dirk Stippel
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland
| | - Michael Thomas
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Universitätsklinikum Köln, Köln, Deutschland
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Norouzi S, Wagner T, MacDonald A, Bischoff J, Brasche J, Trojahn S, Spray J, Pereira R. Dissolved organic matter quantity and quality response of tropical rainforest headwater rivers to the transition from dry to wet season. Sci Rep 2024; 14:3270. [PMID: 38332222 PMCID: PMC10853192 DOI: 10.1038/s41598-024-53362-z] [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: 05/23/2023] [Accepted: 01/31/2024] [Indexed: 02/10/2024] Open
Abstract
Dissolved organic matter (DOM) and its composition in aquatic ecosystems is a key indicator of ecosystem function and an important component of the global carbon cycle. Tropical rainforest headwaters play an important role in global carbon cycling. However, there is a large uncertainty on how DOM sources interact during mobilisation and the potential fate of associated carbon and nutrients. Using field techniques to measure dissolved organic carbon (DOC) concentration and composition, changes in DOM source from headwaters to larger downstream rivers were observed. This study shows that the hydrological connectivity, developed during the transition from dry to wet seasons, changes the DOM supply and transport across a tropical river catchment. The observed variability in the DOC-river discharge relationship provides further evidence of the changes in the DOM supply in a small headwater. This novel insight into the seasonal changes of the dynamics of DOM supply to the river helps understanding the mobilization of terrestrial DOM to tropical headwaters and its export from smaller to larger rivers. It also highlights the data gap in the study of smaller headwaters which may account for uncertainty in estimating the terrestrial carbon transported by inland waters.
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Affiliation(s)
- S Norouzi
- The Lyell Centre, Heriot-Watt University, Edinburgh, UK.
| | - T Wagner
- The Lyell Centre, Heriot-Watt University, Edinburgh, UK
| | - A MacDonald
- British Geological Survey, The Lyell Centre, Edinburgh, UK
| | - J Bischoff
- The Lyell Centre, Heriot-Watt University, Edinburgh, UK
| | - J Brasche
- Iwokrama International Centre for Rainforest Conservation and Development, Georgetown, Guyana
| | - S Trojahn
- The James Hutton Institute, Aberdeen, UK
| | - J Spray
- The Lyell Centre, Heriot-Watt University, Edinburgh, UK
| | - R Pereira
- The Lyell Centre, Heriot-Watt University, Edinburgh, UK.
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Müller MC, Lemaire ON, Kurth JM, Welte CU, Wagner T. Differences in regulation mechanisms of glutamine synthetases from methanogenic archaea unveiled by structural investigations. Commun Biol 2024; 7:111. [PMID: 38243071 PMCID: PMC10799026 DOI: 10.1038/s42003-023-05726-w] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Accepted: 12/19/2023] [Indexed: 01/21/2024] Open
Abstract
Glutamine synthetases (GS) catalyze the ATP-dependent ammonium assimilation, the initial step of nitrogen acquisition that must be under tight control to fit cellular needs. While their catalytic mechanisms and regulations are well-characterized in bacteria and eukaryotes, only limited knowledge exists in archaea. Here, we solved two archaeal GS structures and unveiled unexpected differences in their regulatory mechanisms. GS from Methanothermococcus thermolithotrophicus is inactive in its resting state and switched on by 2-oxoglutarate, a sensor of cellular nitrogen deficiency. The enzyme activation overlays remarkably well with the reported cellular concentration for 2-oxoglutarate. Its binding to an allosteric pocket reconfigures the active site through long-range conformational changes. The homolog from Methermicoccus shengliensis does not harbor the 2-oxoglutarate binding motif and, consequently, is 2-oxoglutarate insensitive. Instead, it is directly feedback-inhibited through glutamine recognition by the catalytic Asp50'-loop, a mechanism common to bacterial homologs, but absent in M. thermolithotrophicus due to residue substitution. Analyses of residue conservation in archaeal GS suggest that both regulations are widespread and not mutually exclusive. While the effectors and their binding sites are surprisingly different, the molecular mechanisms underlying their mode of action on GS activity operate on the same molecular determinants in the active site.
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Affiliation(s)
- Marie-Caroline Müller
- Microbial Metabolism Research Group, Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Olivier N Lemaire
- Microbial Metabolism Research Group, Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Julia M Kurth
- Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
- Microcosm Earth Center, Philipps-University Marburg and Max Planck Institute for Terrestrial Microbiology, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - Cornelia U Welte
- Department of Microbiology, Radboud Institute for Biological and Environmental Sciences, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - Tristan Wagner
- Microbial Metabolism Research Group, Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany.
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Buschen R, Lambertus P, Scheve S, Horst S, Song F, Wöhlbrand L, Neidhardt J, Winklhofer M, Wagner T, Rabus R. Sensitive and selective phenol sensing in denitrifying Aromatoleum aromaticum EbN1 T. Microbiol Spectr 2023; 11:e0210023. [PMID: 37823660 PMCID: PMC10715001 DOI: 10.1128/spectrum.02100-23] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Accepted: 09/05/2023] [Indexed: 10/13/2023] Open
Abstract
IMPORTANCE Aromatic compounds are globally abundant organic molecules with a multitude of natural and anthropogenic sources, underpinning the relevance of their biodegradation. A. aromaticum EbN1T is a well-studied environmental betaproteobacterium specialized on the anaerobic degradation of aromatic compounds. The here studied responsiveness toward phenol in conjunction with the apparent high ligand selectivity (non-promiscuity) of its PheR sensor and those of the related p-cresol (PcrS) and p-ethylphenol (EtpR) sensors are in accord with the substrate-specificity and biochemical distinctiveness of the associated degradation pathways. Furthermore, the present findings advance our general understanding of the substrate-specific regulation of the strain's remarkable degradation network and of the concentration thresholds below which phenolic compounds become essentially undetectable and as a consequence should escape substantial biodegradation. Furthermore, the findings may inspire biomimetic sensor designs for detecting and quantifying phenolic contaminants in wastewater or environments.
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Affiliation(s)
- Ramona Buschen
- General and Molecular Microbiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Pia Lambertus
- General and Molecular Microbiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Sabine Scheve
- General and Molecular Microbiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Simon Horst
- General and Molecular Microbiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Fei Song
- Human Genetics, Department of Human Medicine, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Lars Wöhlbrand
- General and Molecular Microbiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - John Neidhardt
- Human Genetics, Department of Human Medicine, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Michael Winklhofer
- Research Center Neurosensory Science, Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
- Sensory Biology of Animals, Institute of Biology and Environmental Sciences (IBU), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
| | - Tristan Wagner
- Max Planck Research Group Microbial Metabolism, Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Ralf Rabus
- General and Molecular Microbiology, Institute for Chemistry and Biology of the Marine Environment (ICBM), Carl von Ossietzky University of Oldenburg, Oldenburg, Germany
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Cadoux C, Maslać N, Di Luzio L, Ratcliff D, Gu W, Wagner T, Milton RD. The Mononuclear Metal-Binding Site of Mo-Nitrogenase Is Not Required for Activity. JACS Au 2023; 3:2993-2999. [PMID: 38034976 PMCID: PMC10685413 DOI: 10.1021/jacsau.3c00567] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 10/23/2023] [Accepted: 10/23/2023] [Indexed: 12/02/2023]
Abstract
The biological N2-fixation process is catalyzed exclusively by metallocofactor-containing nitrogenases. Structural and spectroscopic studies highlighted the presence of an additional mononuclear metal-binding (MMB) site, which can coordinate Fe in addition to the two metallocofactors required for the reaction. This MMB site is located 15-Å from the active site, at the interface of two NifK subunits. The enigmatic function of the MMB site and its implications for metallocofactor installation, catalysis, electron transfer, or structural stability are investigated in this work. The axial ligands coordinating the additional Fe are almost universally conserved in Mo-nitrogenases, but a detailed observation of the available structures indicates a variation in occupancy or a metal substitution. A nitrogenase variant in which the MMB is disrupted was generated and characterized by X-ray crystallography, biochemistry, and enzymology. The crystal structure refined to 1.55-Å revealed an unambiguous loss of the metal site, also confirmed by an absence of anomalous signal for Fe. The position of the surrounding side chains and the overall architecture are superposable with the wild-type structure. Accordingly, the biochemical and enzymatic properties of the variant are similar to those of the wild-type nitrogenase, indicating that the MMB does not impact nitrogenase's activity and stability in vitro.
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Affiliation(s)
- Cécile Cadoux
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
- National
Centre of Competence in Research (NCCR) Catalysis, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Nevena Maslać
- Max Planck
Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
| | - Léa Di Luzio
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Daniel Ratcliff
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
- National
Centre of Competence in Research (NCCR) Catalysis, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Wenyu Gu
- Laboratory
of Microbial Physiology and Resource Biorecovery, School of Architecture,
Civil and Environmental Engineering (ENAC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Tristan Wagner
- Max Planck
Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
| | - Ross D. Milton
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
- National
Centre of Competence in Research (NCCR) Catalysis, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
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Sahin S, Lemaire ON, Belhamri M, Kurth JM, Welte CU, Wagner T, Milton RD. Bioelectrocatalytic CO 2 Reduction by Mo-Dependent Formylmethanofuran Dehydrogenase. Angew Chem Int Ed Engl 2023; 62:e202311981. [PMID: 37712590 DOI: 10.1002/anie.202311981] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/13/2023] [Accepted: 09/15/2023] [Indexed: 09/16/2023]
Abstract
Massive efforts are invested in developing innovative CO2 -sequestration strategies to counter climate change and transform CO2 into higher-value products. CO2 -capture by reduction is a chemical challenge, and attention is turned toward biological systems that selectively and efficiently catalyse this reaction under mild conditions and in aqueous solvents. While a few reports have evaluated the effectiveness of isolated bacterial formate dehydrogenases as catalysts for the reversible electrochemical reduction of CO2 , it is imperative to explore other enzymes among the natural reservoir of potential models that might exhibit higher turnover rates or preferential directionality for the reductive reaction. Here, we present electroenzymatic catalysis of formylmethanofuran dehydrogenase, a CO2 -reducing-and-fixing biomachinery isolated from a thermophilic methanogen, which was deposited on a graphite rod electrode to enable direct electron transfer for electroenzymatic CO2 reduction. The gas is reduced with a high Faradaic efficiency (109±1 %), where a low affinity for formate prevents its electrochemical reoxidation and favours formate accumulation. These properties make the enzyme an excellent tool for electroenzymatic CO2 -fixation and inspiration for protein engineering that would be beneficial for biotechnological purposes to convert the greenhouse gas into stable formate that can subsequently be safely stored, transported, and used for power generation without energy loss.
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Affiliation(s)
- Selmihan Sahin
- University of Geneva, Department of Inorganic and Analytical Chemistry, Sciences II, Quai Ernest-Ansermet 30, 1211, Geneva 4, Switzerland
- Department of Chemistry, Faculty of Arts and Sciences, Suleyman Demirel University, Cunur, 32260, Isparta, Turkiye
| | - Olivier N Lemaire
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Mélissa Belhamri
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Julia M Kurth
- Department of Microbiology, Institute for Water and Wetland Research, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, Netherlands
- Microcosm Earth Center - Philipps-Universität Marburg & Max Planck Institute for Terrestrial Microbiology, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - Cornelia U Welte
- Department of Microbiology, Institute for Water and Wetland Research, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, Netherlands
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359, Bremen, Germany
| | - Ross D Milton
- University of Geneva, Department of Inorganic and Analytical Chemistry, Sciences II, Quai Ernest-Ansermet 30, 1211, Geneva 4, Switzerland
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Wahba R, Schmidt T, Buchner D, Wagner T, Bruns CJ. [Surgical treatment of pseudomyxoma peritonei-Cytoreductive surgery and hyperthermic intraperitoneal chemotherapy]. Chirurgie (Heidelb) 2023; 94:840-844. [PMID: 37578542 DOI: 10.1007/s00104-023-01937-3] [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: 07/03/2023] [Indexed: 08/15/2023]
Abstract
BACKGROUND Pseudomyxoma peritonei syndrome (PMP) is an orphan disease. Surgery is the fundament of treatment. METHOD Short review summarizing the state of the art treatment. RESULTS Cytoreductive surgery (CRS) in combination with hyperthermic intraperitoneal chemotherapy (HIPEC) form the foundations of treatment for PMP. The peritoneal cancer index should be preoperatively determined based on imaging and/or laparoscopy, intraoperatively validated and both should be documented. An extraperitoneal surgical preparation technique leads to effective en bloc resection of the peritoneum and the affected abdominal area. The HIPEC technique should be performed with mitomycin C for 60-90 min. Complete CRS (CC = 0, CC = 1) and the histological subtype are relevant for the prognosis. Structured educational programs and mentoring can optimize the learning curve. The aftercare should be performed at the surgical center. After follow-up imaging at 3 months after CRS, in the first 2 years a control should be carried out every 6 months. Thereafter, the intervals can be extended to 1 year. CONCLUSION Standardized surgical treatment and HIPEC, optimized specific surgical training and structured follow-up at the center lead to an excellent long-term prognosis for patients with PMP.
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Affiliation(s)
- Roger Wahba
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Uniklinik Köln, Kerpener Straße 62, 50937, Köln, Deutschland.
| | - Thomas Schmidt
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Uniklinik Köln, Kerpener Straße 62, 50937, Köln, Deutschland
| | - Denise Buchner
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Uniklinik Köln, Kerpener Straße 62, 50937, Köln, Deutschland
| | - Tristan Wagner
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Uniklinik Köln, Kerpener Straße 62, 50937, Köln, Deutschland
| | - Christiane J Bruns
- Klinik für Allgemein‑, Viszeral‑, Tumor- und Transplantationschirurgie, Uniklinik Köln, Kerpener Straße 62, 50937, Köln, Deutschland
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Wagner T, Mustafov O, Hummels M, Grabenkamp A, Thomas MN, Schiffmann LM, Bruns CJ, Stippel DL, Wahba R. Imaged guided surgery during arteriovenous malformation of gastrointestinal stromal tumor using hyperspectral and indocyanine green visualization techniques: A case report. World J Clin Cases 2023; 11:5530-5537. [PMID: 37637700 PMCID: PMC10450370 DOI: 10.12998/wjcc.v11.i23.5530] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/28/2023] [Accepted: 07/18/2023] [Indexed: 08/16/2023] Open
Abstract
BACKGROUND This case report demonstrates the simultaneous development of a gastrointestinal stromal tumour (GIST) with arteriovenous malformations (AVMs) within the jejunal mesentery. A 74-year-old male presented to the department of surgery at our institution with a one-month history of abdominal pain. Contrast-enhanced computed tomography revealed an AVM. During exploratory laparotomy, hyperspectral imaging (HSI) and indocyanine green (ICG) fluorescence were used to evaluate the extent of the tumour and determine the resection margins. Intraoperative imaging confirmed AVM, while histopathological evaluation showed an epithelioid, partially spindle cell GIST. CASE SUMMARY This is the first case reporting the use of HSI and ICG to image GIST intermingled with an AVM. The resection margins were planned using intraoperative analysis of additional optical data. Image-guided surgery enhances the clinician's knowledge of tissue composition and facilitates tissue differentiation. CONCLUSION Since image-guided surgery is safe, this procedure should increase in popularity among the next generation of surgeons as it is associated with better postoperative outcomes.
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Affiliation(s)
- Tristan Wagner
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Onur Mustafov
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Marielle Hummels
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Anders Grabenkamp
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Michael N Thomas
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Lars Mortimer Schiffmann
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Christiane J Bruns
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Dirk L Stippel
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
| | - Roger Wahba
- Clinic and Polyclinic for General, Visceral, Tumor and Transplant Surgery, University of Cologne, Cologne 50923, North Rhine Westphalia, Germany
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10
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Yang L, Wagner T, Mechaly A, Boyko A, Bruch EM, Megrian D, Gubellini F, Alzari PM, Bellinzoni M. High resolution cryo-EM and crystallographic snapshots of the actinobacterial two-in-one 2-oxoglutarate dehydrogenase. Nat Commun 2023; 14:4851. [PMID: 37563123 PMCID: PMC10415282 DOI: 10.1038/s41467-023-40253-6] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 07/19/2023] [Indexed: 08/12/2023] Open
Abstract
Actinobacteria possess unique ways to regulate the oxoglutarate metabolic node. Contrary to most organisms in which three enzymes compose the 2-oxoglutarate dehydrogenase complex (ODH), actinobacteria rely on a two-in-one protein (OdhA) in which both the oxidative decarboxylation and succinyl transferase steps are carried out by the same polypeptide. Here we describe high-resolution cryo-EM and crystallographic snapshots of representative enzymes from Mycobacterium smegmatis and Corynebacterium glutamicum, showing that OdhA is an 800-kDa homohexamer that assembles into a three-blade propeller shape. The obligate trimeric and dimeric states of the acyltransferase and dehydrogenase domains, respectively, are critical for maintaining the overall assembly, where both domains interact via subtle readjustments of their interfaces. Complexes obtained with substrate analogues, reaction products and allosteric regulators illustrate how these domains operate. Furthermore, we provide additional insights into the phosphorylation-dependent regulation of this enzymatic machinery by the signalling protein OdhI.
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Affiliation(s)
- Lu Yang
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
- Wuhan Institute of Biological Products Co. Ltd., Wuhan, 430207, PR China
| | - Tristan Wagner
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
- Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, Celsiusstraße 1, D-28359, Bremen, Germany
| | - Ariel Mechaly
- Institut Pasteur, Université Paris Cité, Plateforme de Cristallographie, F-75015, Paris, France
| | - Alexandra Boyko
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
- BostonGene, Yerevan, Armenia
| | - Eduardo M Bruch
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
- Sanofi, In vitro Biology, Integrated Drug Discovery, 350 Water St, Cambridge, MA, 02141, USA
| | - Daniela Megrian
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
| | - Francesca Gubellini
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
| | - Pedro M Alzari
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France
| | - Marco Bellinzoni
- Institut Pasteur, Université Paris Cité, CNRS UMR3528, Unité de Microbiologie Structurale, F-75015, Paris, France.
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Jørgensen PL, Kreiberg M, Jørgensen N, Juul A, Oturai PS, Dehlendorff C, Lauritsen J, Wagner T, Rosenvilde J, Daugaard G, Medici CR, Jørgensen NR, Bandak M. Effect of 12-months testosterone replacement therapy on bone mineral density and markers of bone turnover in testicular cancer survivors - results from a randomized double-blind trial. Acta Oncol 2023; 62:689-695. [PMID: 37151105 DOI: 10.1080/0284186x.2023.2207218] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Accepted: 03/31/2023] [Indexed: 05/09/2023]
Abstract
BACKGROUND Testicular cancer survivors (TCS) are at risk of Leydig cell insufficiency, which is a condition characterized by elevated luteinising hormone (LH) in combination with low levels of testosterone. It has been suggested that this condition is associated with impaired metabolic profile and low bone mineral density (BMD). The primary aim of the randomized double-blind trial NCT02991209 was to evaluate metabolic profile after 12-months testosterone replacement therapy (TRT) in TCS with mild Leydig cell insufficiency. Here we present the secondary outcomes of changes in BMD and markers of bone turnover. METHODOLOGY In total, 69 TCS with mild Leydig cell insufficiency were randomized 1:1 to 12 months TRT (n = 35) (Tostran, gel, 2%, applied transdermally, with a maximum daily dose of 40 mg) or placebo (n = 34). BMD and markers of bone turnover were evaluated at baseline, after 6- and 12-months TRT, and 3-months post-treatment. Linear mixed effects models were used to analyse changes in BMD, N-terminal propeptide of type 1 procollagen (P1NP) and C-terminal telopeptide of type I collagen (CTX). RESULTS After 12 months treatment, TRT was not associated with a statistically significant difference in BMD compared to placebo; total body BMD: 0.01 g/cm2 (95% confidence interval (CI): -0.01 - 0.02), BMD of the lumbar spine: 0.01 g/cm2, (95% CI: -0.01-0.03), BMD of the left femoral neck: 0.00, (95% CI: -0.01-0.02). TRT was associated with a small but statistically significant increase in P1NP: 11.65 µg/L (95% CI: 3.96, 19.35), while there was no difference in CTX. CONCLUSION 12 months of TRT did not change BMD, while there was as small and clinically irrelevant increase in P1NP compared to placebo in TCS with mild Leydig cell insufficiency. The findings need validation in a larger cohort.
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Affiliation(s)
- P L Jørgensen
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - M Kreiberg
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - N Jørgensen
- Department of Growth and Reproduction, Copenhagen University hospital - Rigshospitalet, Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University hospital - Rigshospitalet, Copenhagen, Denmark
| | - A Juul
- Department of Growth and Reproduction, Copenhagen University hospital - Rigshospitalet, Copenhagen, Denmark
- International Center for Research and Research Training in Endocrine Disruption of Male Reproduction and Child Health (EDMaRC), Copenhagen University hospital - Rigshospitalet, Copenhagen, Denmark
- Department Clinical Medicine, University of Copenhagen, Denmark
| | - P S Oturai
- Department of Clinical Physiology, Nuclear Medicine and PET, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - C Dehlendorff
- Statistics and Dataanalysis, Danish Cancer Society Research Center, Danish Cancer Society, Copenhagen, Denmark
| | - J Lauritsen
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - T Wagner
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - J Rosenvilde
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - G Daugaard
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
- Department Clinical Medicine, University of Copenhagen, Denmark
| | - C R Medici
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
| | - N R Jørgensen
- Department of Clinical Biochemistry, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - M Bandak
- Department of Oncology, Copenhagen University Hospital - Rigshospitalet, Copenhagen, Denmark
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12
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Pencharz D, Wagner T. Actionable reporting versus unwanted advice in PET-CT reports. Clin Radiol 2023:S0009-9260(23)00228-3. [PMID: 37349201 DOI: 10.1016/j.crad.2023.05.015] [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] [Received: 01/25/2023] [Revised: 05/17/2023] [Accepted: 05/24/2023] [Indexed: 06/24/2023]
Abstract
AIM To investigate the opinions of clinician referrers on the presence and type of management advice in reports of positron-emission tomography (PET)-computed tomography (CT) examinations. MATERIALS AND METHODS Eighteen clinicians were interviewed using a structured questionnaire about their opinions on further management advice in PET-CT reports. RESULTS Opinions varied amongst clinicians, but some themes predominated: (1) advice on further imaging tests and areas outside the referrer's area of expertise are more welcome than other types of advice; (2) a differential diagnosis or clinical significance is of greater value than specific management advice; (3) some referrers do not want any further advice. CONCLUSION Before advising on further management, reporters should consider clinicians' opinions regarding this. Seeking the opinion of clinicians in other hospitals may be necessary. A review of the Royal College of Radiologists Actionable Reports standard to ensure it is more in line with the opinions of clinicians may be useful.
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Affiliation(s)
- D Pencharz
- Department of Nuclear Medicine, Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London NW3, UK.
| | - T Wagner
- Department of Nuclear Medicine, Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London NW3, UK
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13
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Jespersen M, Wagner T. Assimilatory sulfate reduction in the marine methanogen Methanothermococcus thermolithotrophicus. Nat Microbiol 2023:10.1038/s41564-023-01398-8. [PMID: 37277534 DOI: 10.1038/s41564-023-01398-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 04/26/2023] [Indexed: 06/07/2023]
Abstract
Methanothermococcus thermolithotrophicus is the only known methanogen that grows on sulfate as its sole sulfur source, uniquely uniting methanogenesis and sulfate reduction. Here we use physiological, biochemical and structural analyses to provide a snapshot of the complete sulfate reduction pathway of this methanogenic archaeon. We find that later steps in this pathway are catalysed by atypical enzymes. PAPS (3'-phosphoadenosine 5'-phosphosulfate) released by APS kinase is converted into sulfite and 3'-phosphoadenosine 5'-phosphate (PAP) by a PAPS reductase that is similar to the APS reductases of dissimilatory sulfate reduction. A non-canonical PAP phosphatase then hydrolyses PAP. Finally, the F420-dependent sulfite reductase converts sulfite to sulfide for cellular assimilation. While metagenomic and metatranscriptomic studies suggest that the sulfate reduction pathway is present in several methanogens, the sulfate assimilation pathway in M. thermolithotrophicus is distinct. We propose that this pathway was 'mix-and-matched' through the acquisition of assimilatory and dissimilatory enzymes from other microorganisms and then repurposed to fill a unique metabolic role.
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Affiliation(s)
- Marion Jespersen
- Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Tristan Wagner
- Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, Bremen, Germany.
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14
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Cadoux C, Ratcliff D, Maslać N, Gu W, Tsakoumagkos I, Hoogendoorn S, Wagner T, Milton RD. Nitrogen Fixation and Hydrogen Evolution by Sterically Encumbered Mo-Nitrogenase. JACS Au 2023; 3:1521-1533. [PMID: 37234119 PMCID: PMC10207099 DOI: 10.1021/jacsau.3c00165] [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] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 04/20/2023] [Indexed: 05/27/2023]
Abstract
The substrate-reducing proteins of all nitrogenases (MoFe, VFe, and FeFe) are organized as α2ß2(γ2) multimers with two functional halves. While their dimeric organization could afford improved structural stability of nitrogenases in vivo, previous research has proposed both negative and positive cooperativity contributions with respect to enzymatic activity. Here, a 1.4 kDa peptide was covalently introduced in the proximity of the P cluster, corresponding to the Fe protein docking position. The Strep-tag carried by the added peptide simultaneously sterically inhibits electron delivery to the MoFe protein and allows the isolation of partially inhibited MoFe proteins (where the half-inhibited MoFe protein was targeted). We confirm that the partially functional MoFe protein retains its ability to reduce N2 to NH3, with no significant difference in selectivity over obligatory/parasitic H2 formation. Our experiment concludes that wild-type nitrogenase exhibits negative cooperativity during the steady state regarding H2 and NH3 formation (under Ar or N2), with one-half of the MoFe protein inhibiting turnover in the second half. This emphasizes the presence and importance of long-range (>95 Å) protein-protein communication in biological N2 fixation in Azotobacter vinelandii.
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Affiliation(s)
- Cécile Cadoux
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
- National
Centre of Competence in Research (NCCR) Catalysis, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Daniel Ratcliff
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
- National
Centre of Competence in Research (NCCR) Catalysis, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Nevena Maslać
- Max
Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
| | - Wenyu Gu
- Department
of Chemical Engineering, Stanford University, Stanford, California 94305, United States
| | - Ioannis Tsakoumagkos
- Department
of Organic Chemistry, National Center of Competence in Research (NCCR)
Chemical Biology, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Sascha Hoogendoorn
- Department
of Organic Chemistry, National Center of Competence in Research (NCCR)
Chemical Biology, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
| | - Tristan Wagner
- Max
Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
| | - Ross D. Milton
- Department
of Inorganic and Analytical Chemistry, Faculty of Sciences, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
- National
Centre of Competence in Research (NCCR) Catalysis, University of Geneva, Quai Ernest-Ansermet 30, 1211 Geneva 4, Switzerland
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Lemaire ON, Belhamri M, Wagner T. Structural and biochemical elucidation of class I hybrid cluster protein natively extracted from a marine methanogenic archaeon. Front Microbiol 2023; 14:1179204. [PMID: 37250035 PMCID: PMC10210160 DOI: 10.3389/fmicb.2023.1179204] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/03/2023] [Indexed: 05/31/2023] Open
Abstract
Whilst widespread in the microbial world, the hybrid cluster protein (HCP) has been paradoxically a long-time riddle for microbiologists. During three decades, numerous studies on a few model organisms unravelled its structure and dissected its metal-containing catalyst, but the physiological function of the enzyme remained elusive. Recent studies on bacteria point towards a nitric oxide reductase activity involved in resistance during nitrate and nitrite reduction as well as host infection. In this study, we isolated and characterised a naturally highly produced HCP class I from a marine methanogenic archaeon grown on ammonia. The crystal structures of the enzyme in a reduced and partially oxidised state, obtained at a resolution of 1.45 and 1.36-Å, respectively, offered a precise picture of the archaeal enzyme intimacy. There are striking similarities with the well-studied enzymes from Desulfovibrio species regarding sequence, kinetic parameters, structure, catalyst conformations, and internal channelling systems. The close phylogenetic relationship between the enzymes from Methanococcales and many Bacteria corroborates this similarity. Indeed, Methanococcales HCPs are closer to these bacterial homologues than to any other archaeal enzymes. The relatively high constitutive production of HCP in M. thermolithotrophicus, in the absence of a notable nitric oxide source, questions the physiological function of the enzyme in these ancient anaerobes.
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Wagner T, Zhou L, Magnussen C, Bernhardt A, Reichenspurner H, Kirchhof P, Grahn H. Patient-Reported Outcomes in Short-Time Follow-Up after Discharge of Patients with Advanced Heart Failure. J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.559] [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: 04/05/2023] Open
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17
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Jahnen M, Amiel T, Wagner T, Kirchhoff F, Büchler J, Düwel C, Koll F, Westenfelder K, Gschwend J, Horn T, Herkommer K, Lunger L. Does experience change the role of systematic biopsy during mpMRI-US fusion prostate biopsy? A single center experience. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00220-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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18
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Jespersen M, Pierik AJ, Wagner T. Structures of the sulfite detoxifying F 420-dependent enzyme from Methanococcales. Nat Chem Biol 2023; 19:695-702. [PMID: 36658338 DOI: 10.1038/s41589-022-01232-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 11/22/2022] [Indexed: 01/21/2023]
Abstract
Methanogenic archaea are main actors in the carbon cycle but are sensitive to reactive sulfite. Some methanogens use a sulfite detoxification system that combines an F420H2-oxidase with a sulfite reductase, both of which are proposed precursors of modern enzymes. Here, we present snapshots of this coupled system, named coenzyme F420-dependent sulfite reductase (Group I Fsr), obtained from two marine methanogens. Fsr organizes as a homotetramer, harboring an intertwined six-[4Fe-4S] cluster relay characterized by spectroscopy. The wire, spanning 5.4 nm, electronically connects the flavin to the siroheme center. Despite a structural architecture similar to dissimilatory sulfite reductases, Fsr shows a siroheme coordination and a reaction mechanism identical to assimilatory sulfite reductases. Accordingly, the reaction of Fsr is unidirectional, reducing sulfite or nitrite with F420H2. Our results provide structural insights into this unique fusion, in which a primitive sulfite reductase turns a poison into an elementary block of life.
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Affiliation(s)
| | - Antonio J Pierik
- Biochemistry, Faculty of Chemistry, University of Kaiserslautern-Landau, Kaiserslautern, Germany
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, Bremen, Germany.
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19
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Lee K, Wilke M, Wagner T, Kennedy A, Koehler F. Disease progression of heart failure in type 2 diabetes patients in Germany; a real world data analysis using health insurance claims data. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.866] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Individuals with Type 2 Diabetes (T2D) show two- to four-fold increased risk of Heart failure (HF). Given the increasing T2D prevalence in Germany, researching the interaction of T2DM and HF is of high importance. HF still progresses rapidly. Left ventricular ejection fraction (LVEF) plays an important role in understanding disease progression. Commonly, LVEF is being distinguished into three categories: HF with preserved LVEF (HFpEF), HF with moderate reduced LVEF (HFmEF) and HF with reduced LVEF (HFrEF). In Germany there are no recent data on disease progression in HF especially according to LVEF categories. Purpose of this study is to a) measure how many T2DM patients acquire HF over two years; b) understand the progression of HF in these patients in a five-year follow-up; and c) visualize disease progression with Sankey plots.
We used insurance claims data from German Statutory Health Insurances (SHI). As LVEF category is not included in these data, a model was used to classify patients into HFrEF or HFpEF (with omitting the HFmEF category due to better statistical performance of a binary model). The model was derived from a set of 34 proxy variables (disease coding, interventions, drug prescriptions). Selection period for T2D patients is 2013. Inclusion period was 2014–2015, follow-up 2016–2020. Baseline characteristics include demographic data, disease stage, comorbidities, and risk factors. Follow-up criteria were MACE (including hospital admission) changes in LVEF category and mortality. 173,195 individuals with T2D were identified in 2013, median age 66 yrs. 6,725 (3.88% of the overall sample) developed HF in 2014 or 2015, median age 74 yrs. As Sankey plot visualizations show, 34.4% of the patients had MACE over the course of five years; 24.5% were still alive and 9.9% died from CV-death. Further 33% died of other causes. Myocardial infarct was the most common MACE, followed by stroke (32%), hospital admission for HF (28%) and CV death (7%). 40% of patients were never admitted to a hospital over the study period. Exploratory analyses identified 5,282 HFpEF patients (78.54%) and 1,443 HFrEF patients (21.46%). Survival after 5 years in HFpEF patients was 71%, in HFrEF patients 29%. After five years 3,430 (90%) surviving patients were still in HFpEF and 399 (10%) in HFrEF.
This analysis provides disease progression insights in T2D patients who developed HF in Germany. The sample is representative for the country and numbers can be extrapolated to the overall German SHI population. A significant number of patients die within 5 years of initial diagnosis. As echo diagrams are not available in German insurance claims, validity of the predicted LVEF cannot be assessed. Further research featuring real world LVEF score validation would be highly desirable. Beyond therapeutic care, digital solutions for closer monitoring of these patients may improve the outcome of these patients.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): Sanofi
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Affiliation(s)
- K Lee
- Sanofi , Reading , United Kingdom
| | - M Wilke
- inspiring-health GmbH , Munich , Germany
| | - T Wagner
- inspiring-health GmbH , Munich , Germany
| | - A Kennedy
- Sanofi , Fort Collins , United States of America
| | - F Koehler
- Charité - University Medicine Berlin , Berlin , Germany
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Ashraf M, AlShammari A, De Sousa P, Naruka V, Tincknell L, Booth S, Proli C, Patel A, Docherty C, Murray J, Wagner T, Mhizha N, Lim E. EP01.07-006 Incidence and Resource Burden for the Management of CT Detected Ground Glass Opacities at a Tertiary Lung Cancer Service in the UK. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.327] [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: 11/27/2022]
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21
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Wagner T, Radunz S, Becker F, Chalopin C, Kohler H, Gockel I, Jansen-Winkeln B. Hyperspectral imaging detects perfusion and oxygenation differences between stapled and hand-sewn intestinal anastomoses. Innov Surg Sci 2022; 7:59-63. [PMID: 36317013 PMCID: PMC9574651 DOI: 10.1515/iss-2022-0007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/29/2022] [Accepted: 05/25/2022] [Indexed: 08/16/2023] Open
Abstract
OBJECTIVES Hand-sewn and stapled intestinal anastomoses are both daily performed routine procedures by surgeons. Yet, differences in micro perfusion of these two surgical techniques and their impact on surgical outcomes are still insufficiently understood. Only recently, hyperspectral imaging (HSI) has been established as a non-invasive, contact-free, real-time assessment tool for tissue oxygenation and micro-perfusion. Hence, objective of this study was HSI assessment of different intestinal anastomotic techniques and analysis of patients' clinical outcome. METHODS Forty-six consecutive patients with an ileal-ileal anastomoses were included in our study; 21 side-to-side stapled and 25 end-to-end hand-sewn. Based on adsorption and reflectance of the analyzed tissue, chemical color imaging indicates oxygen saturation (StO2), tissue perfusion (near-infrared perfusion index [NIR]), organ hemoglobin index (OHI), and tissue water index (TWI). RESULTS StO2 as well as NIR of the region of interest (ROI) was significantly higher in stapled anastomoses as compared to hand-sewn ileal-ileal anastomoses (StO2 0.79 (0.74-0.81) vs. 0.66 (0.62-0.70); p<0.001 NIR 0.83 (0.70-0.86) vs. 0.70 (0.63-0.76); p=0.01). In both groups, neither anastomotic leakage nor abdominal septic complications nor patient death did occur. CONCLUSIONS Intraoperative HSI assessment is able to detect significant differences in tissue oxygenation and NIR of hand-sewn and stapled intestinal anastomoses. Long-term clinical consequences resulting from the reduced tissue oxygenation and tissue perfusion in hand-sewn anastomoses need to be evaluated in larger clinical trials, as patients may benefit from further refined surgical techniques.
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Affiliation(s)
- Tristan Wagner
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
- Department of General, Visceral and Transplant Surgery, University Hospital of Münster, Münster, Germany
| | - Sonia Radunz
- Department of General, Visceral and Transplant Surgery, University Hospital of Münster, Münster, Germany
| | - Felix Becker
- Department of General, Visceral and Transplant Surgery, University Hospital of Münster, Münster, Germany
| | - Claire Chalopin
- Innovation Center Computer Assisted Surgery, University of Leipzig, Leipzig, Germany
| | - Hannes Kohler
- Innovation Center Computer Assisted Surgery, University of Leipzig, Leipzig, Germany
| | - Ines Gockel
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Boris Jansen-Winkeln
- Department of Visceral, Transplant, Thoracic and Vascular Surgery, University Hospital of Leipzig, Leipzig, Germany
- Department of General, Visceral and Vascular-Surgery, St. George’s Hospital of Leipzig, Leipzig, Germany
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22
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Wagner T, Katou S, Wahl P, Vogt F, Kneifel F, Morgul H, Vogel T, Houben P, Becker F, Struecker B, Pascher A, Radunz S. Hyperspectral imaging for quantitative assessment of hepatic steatosis in human liver allografts. Clin Transplant 2022; 36:e14736. [PMID: 35622345 DOI: 10.1111/ctr.14736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/02/2022] [Revised: 04/25/2022] [Accepted: 05/01/2022] [Indexed: 11/24/2022]
Abstract
INTRODUCTION In liver transplantation (LT), steatosis is commonly judged to be a risk factor for graft dysfunction, and quantitative assessment of hepatic steatosis remains crucial. Liver biopsy as the gold standard for evaluation of hepatic steatosis has certain drawbacks, i.e. invasiveness, and intra- and inter-observer variability. A non-invasive, quantitative modality could replace liver biopsy and eliminate these disadvantages, but has not yet been evaluated in human LT. METHODS We performed a pilot study to evaluate the feasibility and accuracy of hyperspectral imaging (HSI) in the assessment of hepatic steatosis of human liver allografts for transplantation. Thirteen deceased donor liver allografts were included in the study. The degree of steatosis was assessed by means of conventional liver biopsy as well as HSI, performed at the end of backtable preparation, during normothermic machine perfusion (NMP), and after reperfusion in the recipient. RESULTS Organ donors were 51 [30-83] years old, and 61.5% were male. Donor body mass index was 24.2 [16.5-38.0] kg/m2. The tissue lipid index (TLI) generated by HSI at the end of back-table preparation correlated significantly with the histopathologically assessed degree of overall hepatic steatosis (R2 = 0.9085, p<0.0001); this was based on a correlation of TLI and microvesicular steatosis (R2 = 0.8120; p<0.0001). There is also a linear relationship between the histopathologically assessed degree of overall steatosis and TLI during NMP (R2 = 0.5646; p = 0.0031) as well as TLI after reperfusion (R2 = 0.6562; p = 0.0008). CONCLUSION HSI may safely be applied for accurate assessment of hepatic steatosis in human liver grafts. Certainly, TLI needs further assessment and validation in larger sample sizes. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Tristan Wagner
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Shadi Katou
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Philip Wahl
- Diaspective Vision GmbH, Am Salzhaff, Germany
| | - Franziska Vogt
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Felicia Kneifel
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Haluk Morgul
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Thomas Vogel
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Philipp Houben
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Felix Becker
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Benjamin Struecker
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Andreas Pascher
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
| | - Sonia Radunz
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, Münster, Germany
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Romann S, Wagner T, Katou S, Reuter S, Vogel T, Becker F, Morgul H, Houben P, Wahl P, Pascher A, Radunz S. Hyperspectral Imaging for Assessment of Initial Graft Function in Human Kidney Transplantation. Diagnostics (Basel) 2022; 12:diagnostics12051194. [PMID: 35626349 PMCID: PMC9139834 DOI: 10.3390/diagnostics12051194] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 01/27/2023] Open
Abstract
The aim of our study was to evaluate hyperspectral imaging (HSI) as a rapid, non-ionizing technique for the assessment of organ quality and the prediction of delayed graft function (DGF) in kidney transplantation after static cold storage (SCS, n = 20), as well as hypothermic machine perfusion (HMP, n = 18). HSI assessment of the kidney parenchyma was performed during organ preservation and at 10 and 30 min after reperfusion using the TIVITA® Tissue System (Diaspective Vision GmbH, Am Salzhaff, Germany), calculating oxygen saturation (StO2), near-infrared perfusion index (NIR), tissue haemoglobin index (THI), and tissue water index (TWI). Recipient and donor characteristics were comparable between organ preservation groups. Cold ischemic time was significantly longer in the HMP group (14.1 h [3.6–23.1] vs. 8.7h [2.2–17.0], p = 0.002). The overall presence of DGF was comparable between groups (HMP group n = 10 (55.6%), SCS group n = 10 (50.0%)). Prediction of DGF was possible in SCS and HMP kidneys; StO2 at 10 (50.00 [17.75–76.25] vs. 63.17 [27.00–77.75]%, p = 0.0467) and 30 min (57.63 [18.25–78.25] vs. 65.38 [21.25–83.33]%, p = 0.0323) after reperfusion, as well as NIR at 10 (41.75 [1.0–58.00] vs. 48.63 [12.25–69.50], p = 0.0137) and 30 min (49.63 [8.50–66.75] vs. 55.80 [14.75–73.25], p = 0.0261) after reperfusion were significantly lower in DGF kidneys, independent of the organ preservation method. In conclusion, HSI is a reliable method for intraoperative assessment of renal microperfusion, applicable after organ preservation through SCS and HMP, and predicts the development of DGF.
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Affiliation(s)
- Sophie Romann
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Tristan Wagner
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Shadi Katou
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Stefan Reuter
- Department of General Internal Medicine, Nephrology and Rheumatology, University Hospital Münster, 48149 Münster, Germany;
| | - Thomas Vogel
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Felix Becker
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Haluk Morgul
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Philipp Houben
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Philip Wahl
- Diaspective Vision GmbH, 18233 Am Salzhaff, Germany;
| | - Andreas Pascher
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
| | - Sonia Radunz
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany; (S.R.); (T.W.); (S.K.); (T.V.); (F.B.); (H.M.); (P.H.); (A.P.)
- Correspondence: ; Tel.: +49-2151-8351765
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Abstract
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Microbial anaerobic
oxidation of alkanes intrigues the scientific
community by way of its impact on the global carbon cycle, and its
biotechnological applications. Archaea are proposed to degrade short-
and long-chain alkanes to CO2 by reversing methanogenesis,
a theoretically reversible process. The pathway would start with alkane
activation, an endergonic step catalyzed by methyl-coenzyme M reductase
(MCR) homologues that would generate alkyl-thiols carried by coenzyme
M. While the methane-generating MCR found in methanogens has been
well characterized, the enzymatic activity of the putative alkane-fixing
counterparts has not been validated so far. Such an absence of biochemical
investigations contrasts with the current explosion of metagenomics
data, which draws new potential alkane-oxidizing pathways in various
archaeal phyla. Therefore, validating the physiological function of
these putative alkane-fixing machines and investigating how their
structures, catalytic mechanisms, and cofactors vary depending on
the targeted alkane have become urgent needs. The first structural
insights into the methane- and ethane-capturing MCRs highlighted unsuspected
differences and proposed some explanations for their substrate specificity.
This Perspective reviews the current physiological, biochemical, and
structural knowledge of alkyl-CoM reductases and offers fresh ideas
about the expected mechanistic and chemical differences among members
of this broad family. We conclude with the challenges of the investigation
of these particular enzymes, which might one day generate biofuels
for our modern society.
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Affiliation(s)
- Olivier N Lemaire
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
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Wagner T, Budelmann T, Volgmann C, Bernhardt A, Knappe D, Magnussen C, Reichenspurner H, Kirchhof P, Grahn H. Impact of Treatment Strategies and Hemodynamics on Kidney Function After Heart Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1106] [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: 10/18/2022] Open
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26
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Teich M, Schuster T, Leister N, Zozgornik S, Fugal J, Wagner T, Zschau E, Häussler R, Stolle H. Real-time, large-depth holographic 3D head-up display: selected aspects. Appl Opt 2022; 61:B156-B163. [PMID: 35201136 DOI: 10.1364/ao.442924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/03/2021] [Indexed: 06/14/2023]
Abstract
Today's state-of-the-art automotive head-up displays (HUD) possess single- or double layer focal planes that limit the observers' eye focus to these planes when crucial information is shown. Other visual 3D cues such as motion parallax also suffer from this limitation. The resulting viewing experience contradicts the natural way of viewing during driving or interaction, when alerts and hints should appear at the correct projection depth where real objects of interest are located. Here we present a real-time holographic HUD with continuous depth that supports the intuitive and natural way of viewing and interacting with virtual environments outside and inside the car. We demonstrate full-color, 3D real-time encoding within a field-of-view of 5∘×3∘.
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Pencharz D, Modi S, Bandyopadhyay S, Alhun U, Marchbank N, Patel A, Wagner T. Absence of clinical benefit of FDG PET-CT in staging T1 part-solid lung adenocarcinoma. Clin Radiol 2021; 77:195-202. [PMID: 34953570 DOI: 10.1016/j.crad.2021.11.013] [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] [Received: 08/30/2021] [Accepted: 11/17/2021] [Indexed: 11/03/2022]
Abstract
AIM To assess the rates of nodal and metastatic disease and change in management when staging part-solid T1 lung adenocarcinomas using integrated 2-[18F]-fluoro-2-deoxy-d-glucose (FDG) positron-emission tomography (PET)-computed tomography (CT) in a UK population. MATERIALS AND METHODS This was a retrospective review of PET-CT examinations performed to stage radiologically suspected T1 part-solid lung adenocarcinoma (n=58) from two different centres. Rates of detection of nodal and metastatic disease, change in management, and final patient outcome were recorded. RESULTS PET-CT changed the stage in one patient from N0 to N1. It did not change final management in any patient. CONCLUSIONS In this UK population, PET-CT had minimal additional diagnostic benefit in staging patients with T1 part-solid lung adenocarcinoma. Especially given its cost, the inclusion of PET-CT for this indication in guidelines should be reviewed.
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Affiliation(s)
- D Pencharz
- Department of Nuclear Medicine, The Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK.
| | - S Modi
- Department of Nuclear Medicine, The Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK
| | - S Bandyopadhyay
- Department of Nuclear Medicine, Brighton & Sussex University Hospital NHS Trust, Royal Sussex County Hospital, Eastern Road, Brighton, BN2 5BE, UK; Department of Radiology, Sheffield Teaching Hospital NHS Foundation Trust, Royal Hallamshire Hospital, Glossop Rd, Broomhall, Sheffield, S10 2JF, UK
| | - U Alhun
- Department of Nuclear Medicine, Brighton & Sussex University Hospital NHS Trust, Royal Sussex County Hospital, Eastern Road, Brighton, BN2 5BE, UK; Department of General Practice, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
| | - N Marchbank
- Department of Radiology, Brighton & Sussex University Hospital NHS Trust, Royal Sussex County Hospital, Eastern Road, Brighton, BN2 5BE, UK
| | - A Patel
- Department of Nuclear Medicine, The Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK; Department of Respiratory Medicine, The Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK
| | - T Wagner
- Department of Nuclear Medicine, The Royal Free Hospital, Royal Free London NHS Foundation Trust, Pond Street, London, NW3 2QG, UK
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Roux A, Talon R, Alsalman Z, Engilberge S, D'Aléo A, Di Pietro S, Robin A, Bartocci A, Pilet G, Dumont E, Wagner T, Shima S, Riobé F, Girard E, Maury O. Influence of Divalent Cations in the Protein Crystallization Process Assisted by Lanthanide-Based Additives. Inorg Chem 2021; 60:15208-15214. [PMID: 34597021 DOI: 10.1021/acs.inorgchem.1c01635] [Citation(s) in RCA: 1] [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: 11/28/2022]
Abstract
The use of lanthanide complexes as powerful auxiliaries for biocrystallography prompted us to systematically analyze the influence of the commercial crystallization kit composition on the efficiency of two lanthanide additives: [Eu(DPA)3]3- and Tb-Xo4. This study reveals that the tris(dipicolinate) complex presents a lower chemical stability and a strong tendency toward false positives, which are detrimental for its use in a high-throughput robotized crystallization platform. In particular, the crystal structures of (Mg(H2O)6)3[Eu(DPA)3]2·7H2O (1), {(Ca(H2O)4)3[Eu(DPA)3]2}n·10nH2O (2), and {Cu(DPA)(H2O)2}n (3), resulting from spontaneous crystallization in the presence of a divalent alkaline-earth cation and transmetalation, are reported. On the other hand, Tb-Xo4 is perfectly soluble in the crystallization media, stable in the presence of alkaline-earth dications, and slowly decomposes (within days) by transmetalation with transition metals. The original structure of [Tb4L4(H2O)4]Cl4·15H2O (4) is also described, where L represents a bis(pinacolato)triazacyclononane ligand. This paper also highlights a potential synergy of interactions between Tb-Xo4 and components of the crystallization mixtures, leading to the formation of complex adducts like {AdkA/Tb-Xo4/Mg2+/glycerol} in the protein binding sites. The observation of such multicomponent adducts illustrated the complexity and versatility of the supramolecular chemistry occurring at the surface of the proteins.
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Affiliation(s)
- Amandine Roux
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France.,Polyvalan, Lyon F-69342, France
| | - Romain Talon
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | - Zaynab Alsalman
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | | | - Anthony D'Aléo
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Sebastiano Di Pietro
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Adeline Robin
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | - Alessio Bartocci
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Guillaume Pilet
- CNRS UMR 5615, Université Lyon, Université Claude Bernard Lyon 1, 43 boulevard du 11 novembre 1918, Villeurbanne Cedex F-69622, France
| | - Elise Dumont
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France.,Institut Universitaire de France, 1 rue Descartes, Paris 75005, France
| | - Tristan Wagner
- Microbial Protein Structure Group, Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Strasse 10, Marburg D-35043, Germany.,Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, 1-Celsiusstrasse, Bremen 35043, Germany
| | - Seigo Shima
- Microbial Protein Structure Group, Max Planck Institute for Terrestrial Microbiology, Karl-von-Frisch-Strasse 10, Marburg D-35043, Germany
| | - François Riobé
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
| | - Eric Girard
- CEA, CNRS, IBS, Université Grenoble Alpes, Grenoble F-38000, France
| | - Olivier Maury
- Laboratoire de Chimie, ENS de Lyon, CNRS, UMR 5182, Université Lyon, Lyon F-69342, France
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Scheuermann U, Rademacher S, Wagner T, Lederer A, Hau HM, Seehofer D, Sucher R. Influence of Multiple Donor Renal Arteries on the Outcome and Graft Survival in Deceased Donor Kidney Transplantation. J Clin Med 2021; 10:jcm10194395. [PMID: 34640413 PMCID: PMC8509629 DOI: 10.3390/jcm10194395] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/19/2021] [Accepted: 09/22/2021] [Indexed: 02/02/2023] Open
Abstract
AIM Complex arterial reconstruction in kidney transplantation (KT) using kidneys from deceased donors (DD) warrants additional study since little is known about the effects on the mid- and long-term outcome and graft survival. METHODS A total of 451 patients receiving deceased donor KT in our department between 1993 and 2017 were included in our study. Patients were divided into three groups according to the number of arteries and anastomosis: (A) 1 renal artery, 1 arterial anastomosis (N = 369); (B) >1 renal artery, 1 arterial anastomosis (N = 47); and (C) >1 renal artery, >1 arterial anastomosis (N = 35). Furthermore, the influence of localization of the arterial anastomosis (common iliac artery (CIA), versus non-CIA) was analyzed. Clinicopathological characteristics, outcome, and graft and patient survival of all groups were compared retrospectively. RESULTS With growing vascular complexity, the time of warm ischemia increased significantly (groups A, B, and C: 40 ± 19 min, 45 ± 19 min, and 50 ± 17 min, respectively; p = 0.006). Furthermore, the duration of operation was prolonged, although this did not reach significance (groups A, B, and C: 175 ± 98 min, 180 ± 35 min, and 210 ± 43 min, respectively; p = 0.352). There were no significant differences regarding surgical complications, post-transplant kidney function (delayed graft function, initial non-function, episodes of acute rejection), or long-term graft survival. Regarding the localization of the arterial anastomosis, non-CIA was an independent prognostic factor for deep vein thrombosis in multivariate analysis (CIA versus non-CIA: OR 11.551; 95% CI, 1.218-109.554; p = 0.033). CONCLUSION Multiple-donor renal arteries should not be considered a contraindication to deceased KT, as morbidity rates and long-term outcomes seem to be comparable with grafts with single arteries and less complex anastomoses.
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Affiliation(s)
- Uwe Scheuermann
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, 04103 Leipzig, Germany; (S.R.); (T.W.); (A.L.); (D.S.); (R.S.)
- Correspondence:
| | - Sebastian Rademacher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, 04103 Leipzig, Germany; (S.R.); (T.W.); (A.L.); (D.S.); (R.S.)
| | - Tristan Wagner
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, 04103 Leipzig, Germany; (S.R.); (T.W.); (A.L.); (D.S.); (R.S.)
- Department of General, Visceral and Transplant Surgery, University Hospital Münster, 48149 Münster, Germany
| | - Andri Lederer
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, 04103 Leipzig, Germany; (S.R.); (T.W.); (A.L.); (D.S.); (R.S.)
| | - Hans-Michael Hau
- Department of Visceral, Thoracic and Vascular Surgery, University Hospital Carl-Gustav-Carus, TU Dresden, 01307 Dresden, Germany;
| | - Daniel Seehofer
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, 04103 Leipzig, Germany; (S.R.); (T.W.); (A.L.); (D.S.); (R.S.)
| | - Robert Sucher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, 04103 Leipzig, Germany; (S.R.); (T.W.); (A.L.); (D.S.); (R.S.)
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Engilberge S, Lemaire O, Mueller MC, Leonarski F, Huang CY, Tomizaki T, Matsugaki N, Royant A, Olieric V, Wang M, Wagner T. The crystallomics pipeline, a shotgun approach on native proteomes to (re)discover the unsuspected. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321093867] [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] Open
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31
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Meyer F, Engel A, Krause A, Wagner T, Poole L, Dubrovska A, Peitzsch C, Petersen C, Rothkamm K, Borgmann K. OC-0401 Avoidance of DNA Replication Stress Leads to Decreased Cytosolic DNA in Breast Cancer Stem Cells. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)06888-2] [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: 11/17/2022]
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32
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Hahn CJ, Lemaire ON, Kahnt J, Engilberge S, Wegener G, Wagner T. Crystal structure of a key enzyme for anaerobic ethane activation. Science 2021; 373:118-121. [PMID: 34210888 DOI: 10.1126/science.abg1765] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 05/28/2021] [Indexed: 02/01/2023]
Abstract
Ethane, the second most abundant hydrocarbon gas in the seafloor, is efficiently oxidized by anaerobic archaea in syntrophy with sulfate-reducing bacteria. Here, we report the 0.99-angstrom-resolution structure of the proposed ethane-activating enzyme and describe the specific traits that distinguish it from methane-generating and -consuming methyl-coenzyme M reductases. The widened catalytic chamber, harboring a dimethylated nickel-containing F430 cofactor, would adapt the chemistry of methyl-coenzyme M reductases for a two-carbon substrate. A sulfur from methionine replaces the oxygen from a canonical glutamine as the nickel lower-axial ligand, a feature conserved in thermophilic ethanotrophs. Specific loop extensions, a four-helix bundle dilatation, and posttranslational methylations result in the formation of a 33-angstrom-long hydrophobic tunnel, which guides the ethane to the buried active site as confirmed with xenon pressurization experiments.
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Affiliation(s)
- Cedric J Hahn
- Max Planck Institute for Marine Microbiology, Bremen 28359, Germany
| | | | - Jörg Kahnt
- Max Planck Institute for Terrestrial Microbiology, Marburg, Germany
| | | | - Gunter Wegener
- Max Planck Institute for Marine Microbiology, Bremen 28359, Germany. .,Center for Marine Environmental Sciences (MARUM), University of Bremen, Bremen, Germany.,Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Bremerhaven, Germany
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, Bremen 28359, Germany.
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Brown A, Shah S, Dluzewski S, Musaddaq B, Wagner T, Szyszko T, Wan S, Groves A, Mokbel K, Malhotra A. Unilateral axillary adenopathy following COVID-19 vaccination: a multimodality pictorial illustration and review of current guidelines. Clin Radiol 2021; 76:553-558. [PMID: 34053731 PMCID: PMC8118644 DOI: 10.1016/j.crad.2021.04.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 03/11/2021] [Accepted: 04/29/2021] [Indexed: 11/17/2022]
Abstract
We present a multimodality pictorial review of axillary lymphadenopathy in patients recently vaccinated against COVID-19. As the mass vaccination programme continues to be rolled out worldwide in an effort to combat the pandemic, it is important that radiologists consider recent COVID-19 vaccination in the differential diagnosis of unilateral axillary lymphadenopathy and are aware of typical appearances across all imaging methods. We review current guidelines on the management of unilateral axillary lymphadenopathy in the context of recent COVID-19 vaccination.
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Affiliation(s)
- A Brown
- Radiology Department, Royal Free Hospital, Pond Street, London, NW3 2QG, UK.
| | - S Shah
- Department of Nuclear Medicine, Royal Free Hospital, London, NW3 2QG, UK
| | - S Dluzewski
- Radiology Department, Royal Free Hospital, Pond Street, London, NW3 2QG, UK
| | - B Musaddaq
- Radiology Department, Royal Free Hospital, Pond Street, London, NW3 2QG, UK
| | - T Wagner
- Department of Nuclear Medicine, Royal Free Hospital, London, NW3 2QG, UK
| | - T Szyszko
- Department of Nuclear Medicine, Royal Free Hospital, London, NW3 2QG, UK
| | - S Wan
- Institute of Nuclear Medicine, University College London, WC1E 6BT, UK
| | - A Groves
- Institute of Nuclear Medicine, University College London, WC1E 6BT, UK
| | - K Mokbel
- London Breast Institute, The Princess Grace Hospital, 42-52 Nottingham Place, London, W1U 5NY, UK
| | - A Malhotra
- Radiology Department, Royal Free Hospital, Pond Street, London, NW3 2QG, UK
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Schauer J, Newland D, Friedland-Little J, Albers E, Hong B, Kemna M, Wagner T, Law Y. Treating Pediatric Myocarditis with High Dose Steroids and Immunoglobulin. J Heart Lung Transplant 2021. [DOI: 10.1016/j.healun.2021.01.615] [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] Open
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35
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Hau HM, Jahn N, Brunotte M, Wagner T, Rademacher S, Branzan D, Sucher E, Seehofer D, Sucher R. Pre-operative ankle-brachial index for cardiovascular risk assessment in simultaneous pancreas-kidney transplant recipients: a simple and elegant strategy! BMC Surg 2021; 21:156. [PMID: 33752640 PMCID: PMC7983212 DOI: 10.1186/s12893-021-01159-6] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 03/15/2021] [Indexed: 12/24/2022] Open
Abstract
Background Patients with insulin-dependent diabetes mellitus type 1 (IDDM1) and end-stage kidney disease (ESKD) undergoing simultaneous pancreas kidney transplantation (SPKT) are a population with diffuse atherosclerosis and elevated risk of cardio- and cerebrovascular morbidity and mortality. We aimed to investigate the feasibility of preoperative screening for peripheral arterial disease (PAD), specifically ankle-brachial index (ABI) testing, to predict peri- and postoperative outcomes in SPKT recipients. Methods Medical data (2000–2016) from all patients with IDDM and ESKD undergoing SPKT at our transplant center were retrospectively analyzed. The correlation between PAD (defined by an abnormal ABI before SPKT and graft failure and mortality rates as primary end points, and the occurrence of acute myocardial infarction, cerebrovascular and peripheral vascular complications as secondary end points were investigated after adjustment for known cardiovascular risk factors. Results Among 101 SPKT recipients in our transplant population who underwent structured physiological arterial studies, 17 patients (17%) were diagnosed with PAD before transplantation. PAD, as defined by a low ABI index, was an independent and significant predictor of death (HR, 2.99 (95% CI 1.00–8.87), p = 0.049) and pancreas graft failure (HR, 4.3 (95% CI 1.24–14.91), p = 0.022). No significant differences were observed for kidney graft failure (HR 1.85 (95% CI 0.76–4.50), p = 0.178). In terms of the secondary outcomes, patients with PAD were more likely to have myocardial infarction, stroke, limb ischemia, gangrene or amputation (HR, 2.90 (95% CI 1.19–7.04), p = 0.019). Conclusions Pre-transplant screening for PAD and cardiovascular risk factors with non-invasive ABI testing may help to reduce perioperative complications in high-risk patients. Future research on long-term outcomes might provide more in depth insights in optimal treatment strategies for PAD among SPKT recipients.
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Affiliation(s)
- Hans-Michael Hau
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany. .,Department of Visceral, Thoracic and Vascular Surgery, University Hospital and Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany. .,Department of Surgery, University Hospital of Dresden, Fetscherstrasse 74, 03107, Dresden, Germany.
| | - Nora Jahn
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital of Leipzig, Leipzig, Germany
| | - Max Brunotte
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Tristan Wagner
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Sebastian Rademacher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Daniela Branzan
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Elisabeth Sucher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Daniel Seehofer
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
| | - Robert Sucher
- Department of Visceral, Transplantation, Vascular and Thoracic Surgery, University Hospital of Leipzig, Leipzig, Germany
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Samueli S, Wagner T, Scheibenpflug C, Janata O, Seeber A, Astl J, Kurz H. [PIMS-a new pediatric challenge]. Monatsschr Kinderheilkd 2021; 169:317-321. [PMID: 33686311 PMCID: PMC7927767 DOI: 10.1007/s00112-021-01139-3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Accepted: 01/25/2021] [Indexed: 11/24/2022]
Abstract
The boy of Egyptian origin was previously healthy. After a history of fever for 7 days, abdominal pain, vomiting and dry cough resistant to treatment with oral antibiotics, he was admitted to hospital. The clinical examination showed a slightly red throat, a tense abdomen and erythema. The blood tests revealed leukocytosis and significantly increased inflammatory parameters. The abdominal ultrasound showed thickened intestinal loops in the left lower abdomen and the echocardiography showed minimal mitral regurgitation, a narrow pericardial effusion lamella over both ventricles and normal coronary arteries. Accordingly, cardiac enzymes were elevated. The day after admission, the boy developed an increasing rash and was transferred to the PICU because of septic shock refractory to high volume resuscitation, requiring hemodynamic support with noradrenaline and noninvasive respiratory assistance. The initial testing for SARS-CoV‑2 on nasopharyngeal aspirates was negative twice; however, serum IgG antibodies were positive. Other viral and bacterial infections were excluded as the cause of the symptoms.The patient received IVIG, ASS, furosemide and methylprednisolone and the antibiotic treatment was continued. The dosage of the catecholamine could be reduced according to the patient's condition and the serially performed echocardiographic findings. The patient recovered in his general condition and was discharged from the PICU after 8 days. With the help of a detailed family history, we were able to figure out that the whole family, including the patient himself, had symptoms of a cold about 1 month earlier. Hence, SARS-CoV‑2 antibody tests carried out showed a positive result for all of them.Pediatric inflammatory multisystem syndrome (PIMS) can quickly lead to manifest shock symptoms, necessitating close monitoring. A PICU background is crucial to treat possibly occurring symptoms and complications. High-dose steroids are used therapeutically alongside supportive therapies.
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Affiliation(s)
- S Samueli
- Abteilung für Kinder- und Jugendheilkunde, Klinik Donaustadt, Langobardenstraße 122, 1220 Wien, Österreich
| | - T Wagner
- Abteilung für Kinder- und Jugendheilkunde, Klinik Donaustadt, Langobardenstraße 122, 1220 Wien, Österreich
| | - C Scheibenpflug
- Abteilung für Anästhesie und Intensivmedizin, Klinik Donaustadt, Wien, Österreich
| | - O Janata
- Krankenhaushygiene, Klinik Donaustadt, Wien, Österreich
| | - A Seeber
- Abteilung für Dermatologie, Klinik Donaustadt, Wien, Österreich
| | - J Astl
- Abteilung für Kinder- und Jugendheilkunde, Klinik Donaustadt, Langobardenstraße 122, 1220 Wien, Österreich
| | - H Kurz
- Abteilung für Kinder- und Jugendheilkunde, Klinik Donaustadt, Langobardenstraße 122, 1220 Wien, Österreich
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Patel K, Gooley TA, Bailey N, Bailey M, Hegerova L, Batchelder A, Holdread H, Dunleavy V, Downey T, Frisvold J, Megrath S, Pagarigan K, Szeto J, Rueda J, Islam A, Maree C, Nyatsatsang S, Bork SE, Lipke A, O'Mahony DS, Wagner T, Pulido J, Mignone J, Youssef S, Hartman M, Goldman JD, Pagel JM. Use of the IL-6R antagonist tocilizumab in hospitalized COVID-19 patients. J Intern Med 2021; 289:430-433. [PMID: 32745348 PMCID: PMC7436582 DOI: 10.1111/joim.13163] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 07/20/2020] [Accepted: 07/24/2020] [Indexed: 01/10/2023]
Affiliation(s)
- K Patel
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - T A Gooley
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, WA, USA
| | - N Bailey
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - M Bailey
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - L Hegerova
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - A Batchelder
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - H Holdread
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - V Dunleavy
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - T Downey
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - J Frisvold
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - S Megrath
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - K Pagarigan
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - J Szeto
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
| | - J Rueda
- Infectious Disease, Swedish Medical Center, Seattle, WA, USA
| | - A Islam
- Infectious Disease, Swedish Medical Center, Seattle, WA, USA
| | - C Maree
- Infectious Disease, Swedish Medical Center, Seattle, WA, USA
| | - S Nyatsatsang
- Infectious Disease, Swedish Medical Center, Seattle, WA, USA
| | - S E Bork
- Hospital Medicine, Swedish Medical Center, Seattle, WA, USA
| | - A Lipke
- Pulmonary and Critical Care, Swedish Medical Center, Seattle, WA, USA
| | - D S O'Mahony
- Pulmonary and Critical Care, Swedish Medical Center, Seattle, WA, USA
| | - T Wagner
- Pulmonary and Critical Care, Swedish Medical Center, Seattle, WA, USA
| | - J Pulido
- US Anesthesia Partners, Seattle, WA, USA.,Swedish Heart and Vascular Institute, Swedish Medical Center, Seattle, WA, USA
| | - J Mignone
- Swedish Heart and Vascular Institute, Swedish Medical Center, Seattle, WA, USA
| | - S Youssef
- Swedish Heart and Vascular Institute, Swedish Medical Center, Seattle, WA, USA
| | - M Hartman
- Swedish Heart and Vascular Institute, Swedish Medical Center, Seattle, WA, USA
| | - J D Goldman
- Infectious Disease, Swedish Medical Center, Seattle, WA, USA
| | - J M Pagel
- From the Center for Blood Disorders and Stem Cell Transplantation, Swedish Cancer Institute, Swedish Medical Center, Seattle, WA, USA
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Stachelek J, Weng W, Carey CC, Kemanian AR, Cobourn KM, Wagner T, Weathers KC, Soranno PA. Granular measures of agricultural land use influence lake nitrogen and phosphorus differently at macroscales. Ecol Appl 2020; 30:e02187. [PMID: 32485044 DOI: 10.1002/eap.2187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 04/02/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
Agricultural land use is typically associated with high stream nutrient concentrations and increased nutrient loading to lakes. For lakes, evidence for these associations mostly comes from studies on individual lakes or watersheds that relate concentrations of nitrogen (N) or phosphorus (P) to aggregate measures of agricultural land use, such as the proportion of land used for agriculture in a lake's watershed. However, at macroscales (i.e., in hundreds to thousands of lakes across large spatial extents), there is high variability around such relationships and it is unclear whether considering more granular (or detailed) agricultural data, such as fertilizer application, planting of specific crops, or the extent of near-stream cropping, would improve prediction and inform understanding of lake nutrient drivers. Furthermore, it is unclear whether lake N and P would have different relationships to such measures and whether these relationships would vary by region, since regional variation has been observed in prior studies using aggregate measures of agriculture. To address these knowledge gaps, we examined relationships between granular measures of agricultural activity and lake total phosphorus (TP) and total nitrogen (TN) concentrations in 928 lakes and their watersheds in the Northeastern and Midwest U.S. using a Bayesian hierarchical modeling approach. We found that both lake TN and TP concentrations were related to these measures of agriculture, especially near-stream agriculture. The relationships between measures of agriculture and lake TN concentrations were more regionally variable than those for TP. Conversely, TP concentrations were more strongly related to lake-specific measures like depth and watershed hydrology relative to TN. Our finding that lake TN and TP concentrations have different relationships with granular measures of agricultural activity has implications for the design of effective and efficient policy approaches to maintain and improve water quality.
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Affiliation(s)
- Joseph Stachelek
- Department of Fisheries and Wildlife, Michigan State University, 480 Wilson Road, East Lansing, Michigan, 48824, USA
| | - W Weng
- School of Business, State University of New York College at Geneseo, 1 College Circle, Geneseo, New York, 14454, USA
| | - C C Carey
- Department of Biological Sciences, Virginia Tech, 926 W Campus Drive, Blacksburg, Virginia, 24061, USA
| | - A R Kemanian
- Department of Plant Science, The Pennsylvania State University, 247 Agricultural Sciences and Industries Bldg., University Park, Pennsylvania, 16802, USA
| | - K M Cobourn
- Department of Forest Resources and Environmental Conservation, Virginia Tech, 310 W Campus Drive, Blacksburg, Virginia, 24061, USA
| | - T Wagner
- U.S. Geological Survey, Pennsylvania Cooperative Fish and Wildlife Research Unit, The Pennsylvania State University, University Park, Pennsylvania, USA
| | - K C Weathers
- Cary Institute of Ecosystem Studies, 2801 Sharon Turnpike, Millbrook, New York, 12545, USA
| | - P A Soranno
- Department of Fisheries and Wildlife, Michigan State University, 480 Wilson Road, East Lansing, Michigan, 48824, USA
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von Kuhlberg MK, Wensch-Dorendorf M, Gottschalk J, Wagner T, Herrmann N, Einspanier A. The effects of a training program using a phantom to accustom heifers to the automatic milking system. J Dairy Sci 2020; 104:928-936. [PMID: 33162088 DOI: 10.3168/jds.2020-18715] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 04/15/2020] [Accepted: 07/13/2020] [Indexed: 11/19/2022]
Abstract
The introduction of heifers into the automatic milking system (AMS) can be associated with considerable stress for both animals and farm employees, as completely inexperienced heifers initially do not independently enter the unknown milking robot. This study investigated whether training heifers on an AMS phantom provides the possibility of preparing heifers for the following lactation at the AMS. For this purpose, 77 Holstein-Friesian heifers were randomly assigned to one of 2 experimental groups: control (CON) or phantom (PHAN). Four weeks before calving, the PHAN group was given free access to the phantom, which was similar to the actual milking robot, so that they could explore it and be positively conditioned by feeding concentrate in the phantom. The heifers of the CON group had no contact with the phantom or the AMS before the first milking at the AMS. The milking frequency per animal per day was recorded, and the proportion of animals that had to be fetched for milking was determined, to evaluate how the animals accepted the AMS after calving. To assess the stress level of the animals before and after introduction into the AMS, fecal cortisol concentrations and rumination times of the animals were measured. Additionally, lactation performance characteristics (milk yield, milk flow, electrical conductivity of milk, and milk composition) were recorded for 77 animals. The animals trained on the phantom showed a higher milking frequency (DIM 7: 2.70 ± 0.14 visits/d) than the control animals (DIM 7: 2.41 ± 0.14 visits/d) between the 4th and 10th day of lactation. In addition, between d 1 and d 5, the proportion of animals that had to be fetched for milking was lower in PHAN (DIM 1: 35.18 ± 4.16%) than in CON (DIM 1: 48.03 ± 4.46%). The PHAN heifers had unexpectedly high fecal cortisol levels (1 wk prepartum: 43.50 ± 0.93 ng/g of feces), although not considerably elevated compared with CON (1 wk prepartum: 40.76 ± 1.05 ng/g of feces). Training on the phantom had no appreciable influence on rumination time and lactation performance parameters. The increased number of milking visits and the reduced proportion of animals that had to be fetched into the AMS for milking indicate that training on the phantom prepares the animals well for being milked in the AMS. Therefore, training heifers on the phantom offers the possibility to facilitate the start into early lactation for the animals, providing a valuable contribution to improvement of animal welfare.
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Affiliation(s)
- M K von Kuhlberg
- Institute of Physiological Chemistry, Veterinary Faculty, Leipzig University, 04103 Leipzig, Germany
| | - M Wensch-Dorendorf
- Biometrics and Informatics in Agriculture Group, Institute for Agricultural and Nutritional Sciences, Martin Luther University Halle-Wittenberg, 06099 Halle/Saale, Germany
| | - J Gottschalk
- Institute of Physiological Chemistry, Veterinary Faculty, Leipzig University, 04103 Leipzig, Germany
| | - T Wagner
- Agricultural Society Ruppendorf AG, 01774 Klingenberg, Germany
| | - N Herrmann
- MAP Meißener Agricultural Products AG, 01561 Priestewitz, Germany
| | - A Einspanier
- Institute of Physiological Chemistry, Veterinary Faculty, Leipzig University, 04103 Leipzig, Germany.
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40
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Lemaire ON, Wagner T. Gas channel rerouting in a primordial enzyme: Structural insights of the carbon-monoxide dehydrogenase/acetyl-CoA synthase complex from the acetogen Clostridium autoethanogenum. Biochim Biophys Acta Bioenerg 2020; 1862:148330. [PMID: 33080205 DOI: 10.1016/j.bbabio.2020.148330] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 10/01/2020] [Accepted: 10/15/2020] [Indexed: 10/23/2022]
Abstract
Clostridium autoethanogenum, the bacterial model for biological conversion of waste gases into biofuels, grows under extreme carbon-monoxide (CO) concentrations. The strictly anaerobic bacterium derives its entire cellular energy and carbon from this poisonous gas, therefore requiring efficient molecular machineries for CO-conversion. Here, we structurally and biochemically characterized the key enzyme of the CO-converting metabolism: the CO-dehydrogenase/Acetyl-CoA synthase (CODH/ACS). We obtained crystal structures of natively isolated complexes from fructose-grown and CO-grown C. autoethanogenum cultures. Both contain the same isoforms and if the overall structure adopts the classic α2β2 architecture, comparable to the model enzyme from Moorella thermoacetica, the ACS binds a different position on the CODH core. The structural characterization of a proteolyzed complex and the conservation of the binding interface in close homologs rejected the possibility of a crystallization artefact. Therefore, the internal CO-channeling system, critical to transfer CO generated at the C-cluster to the ACS active site, drastically differs in the complex from C. autoethanogenum. The 1.9-Å structure of the CODH alone provides an accurate picture of the new CO-routes, leading to the ACS core and reaching the surface. Increased gas accessibility would allow the simultaneous CO-oxidation and acetyl-CoA production. Biochemical experiments showed higher flexibility of the ACS subunit from C. autoethanogenum compared to M. thermoacetica, albeit monitoring similar CO-oxidation and formation rates. These results show a reshuffling of internal CO-tunnels during evolution of these Firmicutes, putatively leading to a bidirectional complex that ensure a high flux of CO-conversion toward energy conservation, acting as the main cellular powerplant.
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Affiliation(s)
- Olivier N Lemaire
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, Celsiusstraße 1, 28359 Bremen, Germany.
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41
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Rohse P, Butlewski J, Klein F, Wagner T, Friesen C, Schwarz A, Wiesendanger R, Sengstock K, Becker C. A cavity optomechanical locking scheme based on the optical spring effect. Rev Sci Instrum 2020; 91:103102. [PMID: 33138582 DOI: 10.1063/5.0010255] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 09/12/2020] [Indexed: 06/11/2023]
Abstract
We present a novel locking scheme for active length-stabilization and frequency detuning of a cavity optomechanical device based on the optical spring effect. The error signal is generated by utilizing the position measurement of a thermally driven intra-cavity nanomechanical device and employing its detuning-dependent frequency shift caused by the dispersive coupling to the cavity field. The scheme neither requires external modulation of the laser or the cavity nor does it demand for additional error signal readout, rendering its technical implementation rather simple for a large variety of existing optomechanical devices. Specifically, for large-linewidth microcavities or in situations where other locking schemes appear unfavorable conceptually or are hard to realize technically, the optical spring lock represents a potential alternative for stabilizing the cavity length. We explain the functional principle of the lock and characterize its performance in terms of bandwidth and gain profile.
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Affiliation(s)
- P Rohse
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J Butlewski
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - F Klein
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - T Wagner
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - C Friesen
- INF (Institut für Nanostruktur- und Festkörperphysik), Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany
| | - A Schwarz
- INF (Institut für Nanostruktur- und Festkörperphysik), Universität Hamburg, Jungiusstraße 9, 20355 Hamburg, Germany
| | - R Wiesendanger
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - K Sengstock
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - C Becker
- ZOQ (Zentrum für Optische Quantentechnologien), Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
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Abstract
Most methanogenic archaea use the rudimentary hydrogenotrophic pathway—from CO2and H2to methane—as the terminal step of microbial biomass degradation in anoxic habitats. The barely exergonic process that just conserves sufficient energy for a modest lifestyle involves chemically challenging reactions catalyzed by complex enzyme machineries with unique metal-containing cofactors. The basic strategy of the methanogenic energy metabolism is to covalently bind C1species to the C1carriers methanofuran, tetrahydromethanopterin, and coenzyme M at different oxidation states. The four reduction reactions from CO2to methane involve one molybdopterin-based two-electron reduction, two coenzyme F420–based hydride transfers, and one coenzyme F430–based radical process. For energy conservation, one ion-gradient-forming methyl transfer reaction is sufficient, albeit supported by a sophisticated energy-coupling process termed flavin-based electron bifurcation for driving the endergonic CO2reduction and fixation. Here, we review the knowledge about the structure-based catalytic mechanism of each enzyme of hydrogenotrophic methanogenesis.
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Affiliation(s)
- Seigo Shima
- Max Planck Institute for Terrestrial Microbiology, 35043 Marburg, Germany
| | - Gangfeng Huang
- Max Planck Institute for Terrestrial Microbiology, 35043 Marburg, Germany
| | - Tristan Wagner
- Max Planck Institute for Marine Microbiology, 28359 Bremen, Germany
| | - Ulrich Ermler
- Max Planck Institute of Biophysics, 60438 Frankfurt am Main, Germany
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Jablonski M, Münstermann F, Molinnus D, Muschallik L, Bongaerts J, Wagner T, Keusgen M, Siegert P, Schöning M. Acetoin reductase‐modified field‐effect sensor for the detection of acetoin in beer samples. CHEM-ING-TECH 2020. [DOI: 10.1002/cite.202055191] [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: 11/08/2022]
Affiliation(s)
- M. Jablonski
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
- Philipps Univerity Marburg Institute of Pharmaceutical Chemistry Wilhelm-Roser-Str. 2 35032 Marburg Germany
| | - F. Münstermann
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
| | - D. Molinnus
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
| | - L. Muschallik
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
| | - J. Bongaerts
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
| | - T. Wagner
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
| | - M. Keusgen
- Philipps Univerity Marburg Institute of Pharmaceutical Chemistry Wilhelm-Roser-Str. 2 35032 Marburg Germany
| | - P. Siegert
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
| | - M. J. Schöning
- FH Aachen Institute of Nano- and Biotechnologies (INB) Heinrich-Mußmann-Str. 1 52428 Jülich Germany
- Forschungszentrum Jülich GmbH Institute of Complex Systems (ICS-8) Wilhelm-Johnen-Straße 52425 Jülich Germany
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Abstract
The imaging report is a summary document of findings and the primary form of communication of such to referring clinicians. Expressing uncertainty in the summary report is clearly difficult and the literature is unanimous that there is no agreement between imaging consultants and clinicians, and even between imaging consultants themselves, as to the meaning of uncertainty phrases. It is important for the imaging consultants to express uncertainty in the imaging report, but it is equally important that the referring clinician understands the degree of that uncertainty. Individual terminology does not bridge that gap. The present study reviews the literature in order to differentiate between uncertainty phrasing and hedging, and to find best practice examples to inform practice. We suggest three approaches that may be applied.
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Affiliation(s)
- S Audi
- Nuclear Medicine, Royal Free London NHS Foundation Trust, London, NW3 2QG, UK
| | - D Pencharz
- Nuclear Medicine, Brighton and Sussex University Hospitals NHS Trust, UK
| | - T Wagner
- Nuclear Medicine, Royal Free London NHS Foundation Trust, London, NW3 2QG, UK.
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Blok J, Pluim I, Daugaard G, Wagner T, Józwiak K, Wilthagen E, Looijenga L, Meijer R, Bosch J, Horenblas S. Lymphovascular invasion and presence of embryonal carcinoma as risk factors for occult metastatic disease in clinical stage I nonseminomatous germ cell tumour: A systematic review and meta-analysis. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32828-7] [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] Open
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Peacock O, Smith N, Waters PS, Cheung F, McCormick JJ, Warrier SK, Wagner T, Heriot AG. Outcomes of extended radical resections for locally advanced and recurrent pelvic malignancy involving the aortoiliac axis. Colorectal Dis 2020; 22:818-823. [PMID: 31961476 DOI: 10.1111/codi.14969] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 12/15/2019] [Indexed: 02/08/2023]
Abstract
AIM Currently, there is no clear consensus on the role of extended pelvic resections for locally advanced or recurrent disease involving major vascular structures. The aims of this study were to report the outcomes of consecutive patients undergoing extended resections for pelvic malignancy involving the aortoiliac axis. METHODS Prospective data were collected on patients having extended radical resections for locally advanced or recurrent pelvic malignancies, with aortoiliac axis involvement, requiring en bloc vascular resection and reconstruction, at a single institution between 2014 and 2018. RESULTS Eleven patients were included (median age 60 years; range 31-69 years; seven women). The majority required resection of both arterial and venous systems (n = 8), and the technique for vascular reconstruction was either interposition grafts or femoral-femoral crossover grafts. The median operative time was 510 min (range 330-960 min). Clear resection margins (R0) were achieved in nine patients. The median length of stay was 25 days (range 7-83 days). Seven patients did not suffer an early complication. There was one serious complication (Clavien-Dindo ≥ 3), an arterial graft occlusion secondary to thrombus in the immediate postoperative period, requiring a return to theatre and thrombectomy. The median length of follow-up in this study was 22 months (range 4-58 months). CONCLUSION This series demonstrates that en bloc major vascular resection and reconstruction can be performed safely and can achieve clear resection margins in selected patients with locally advanced or recurrent pelvic malignancy at specialist surgery centres.
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Affiliation(s)
- O Peacock
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - N Smith
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - P S Waters
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - F Cheung
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - J J McCormick
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - S K Warrier
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - T Wagner
- Vascular Surgery Unit, Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | - A G Heriot
- Colorectal Surgery Unit, Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
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Hochstätter R, Schütz A - M, Müller G, Tomasch G, Reif P, Tammaa A, Oppelt P, Husslein PW, Hartmann B, Ramoni A, Reisenberger K, Maier B, Mörtl M, Wagner T, Hefler L, Gamper C, Aigmüller T, Tamussino K, Schöll W. Enhanced Recovery After Surgery (ERAS)-Empfehlungen bei der Kaiserschittentbindung – wie weit werden sie in Österreich angewandt? Geburtshilfe Frauenheilkd 2020. [DOI: 10.1055/s-0040-1713217] [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: 10/24/2022] Open
Affiliation(s)
- R Hochstätter
- Universitätsklinik für Frauenheilkunde und Geburtshilfe
| | - M Schütz A -
- Universitätsklinik für Frauenheilkunde und Geburtshilfe
| | - G Müller
- Klinische Abteilung für Allgemeine Anästhesiologie, Notfall- und Intensivmedizin, Medizinische Universität Graz
| | - G Tomasch
- Universitätsklinik für Frauenheilkunde und Geburtshilfe
| | - P Reif
- Universitätsklinik für Frauenheilkunde und Geburtshilfe
| | - A Tammaa
- Abteilung für Gynäkologie und Geburtshilfe, Krankenhaus Nord Floridsdorf
| | - P Oppelt
- Gynäkologie, Geburtshilfe und Gyn. Endokrinologie, Kepler Universitätsklinikum Linz
| | - P W Husslein
- Univ. Klinik für Frauenheilkunde, AKH – Medizinische Universität Wien
| | - B Hartmann
- Geburtshilflich-Gynäkologische Abteilung, Sozialmedizinisches Zentrum Ost Wien
| | - A Ramoni
- Univ.-Klinik für Gynäkologie und Geburtshilfe, Medizinische Universität Innsbruck
| | - K Reisenberger
- Abteilung für Frauenheilkunde und Geburtshilfe, Klinikum Wels-Grieskirchen, Standort Wels
| | - B Maier
- Gynäkologisch-geburtshilfliche Abteilung, Wilhelminenspital Wien
| | - M Mörtl
- Abteilung für Gynäkologie und Geburtshilfe, LKH Klagenfurt
| | - T Wagner
- Gynäkologisch-geburtshilfliche Abteilung, Sozialmedizinisches Zentrum Süd Wien
| | - L Hefler
- Abteilung für Gynäkologie & Geburtshilfe, BHB Linz
| | - C Gamper
- Abteilung für Gynäkologie und Geburtshilfe, Landesklinikum Wiener Neustadt
| | - T Aigmüller
- Abteilung für Frauenheilkunde und Geburtshilfe, Landeskrankenhaus Hochsteiermark, Standort Leoben
| | - K Tamussino
- Universitätsklinik für Frauenheilkunde und Geburtshilfe
| | - W Schöll
- Universitätsklinik für Frauenheilkunde und Geburtshilfe
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Casaballe N, Di Martino M, Osorio M, Ferrari JA, Wagner T, Frins E. Improved algorithm with adaptive regularization for tomographic reconstruction of gas distributions using DOAS measurements. Appl Opt 2020; 59:D179-D188. [PMID: 32400641 DOI: 10.1364/ao.383584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 02/07/2020] [Indexed: 06/11/2023]
Abstract
Differential optical absorption spectroscopy (DOAS) is notably well suited for the retrieval of UV-absorbing trace gases present in the atmosphere. We combine multi-axis DOAS observations to perform a tomographic reconstruction of the distribution of gases emitted from different sources. We use a new algorithm based on a regularized minimization approach embedding key physical aspects of the solution to constrain the inversion. In this work, we take into account that the spatial sampling of the plume being scanned by the instruments is not homogeneous. Therefore, we introduce an adaptive approach with a locally tuned regularization weight according to the uncertainty levels introduced by the sampling scheme. We tested our approach on reconstructions of simulated gas distributions and different configurations applicable to multi-axis DOAS. Finally, our approach is applied to experimental data for the retrieval of the distribution of ${\rm NO}_2$NO2 within a plume cross section emitted from a group of stacks.
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Perrin E, Anand E, Dyachkova Y, Wagner T, Frediani S, Ballerini A. A prospective, observational study of the safety and effectiveness of intramuscular psychotropic treatment in acutely agitated patients with schizophrenia and bipolar mania. Eur Psychiatry 2020; 27:234-9. [DOI: 10.1016/j.eurpsy.2010.04.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2009] [Revised: 03/04/2010] [Accepted: 04/04/2010] [Indexed: 11/15/2022] Open
Abstract
AbstractThis naturalistic, observational pan-European study assessed the safety and early effectiveness of intramuscular (IM) psychotropic treatments in patients with acute agitation suffering from schizophrenia or bipolar mania. One thousand nine hundred and forty of 1945 patients completed the 24-hour observation period after initial IM treatment. Patients from 12 European countries were included (mean age 39 years; 58% male, 66% schizophrenia). IM treatment was at the physician's discretion. The primary objective was to describe the acute tolerability of IM psychotropic therapies in clinical practice, with particular emphasis on EPS. At baseline, 68% of the patients received IM monotherapy, with IM olanzapine most commonly prescribed (36%). During the first 24hours, 190 (9.8%) patients experienced EPS. The occurrence of EPS was statistically significantly lower in patients treated with IM olanzapine compared to those treated with other IM psychotropic medications (mainly typical antipsychotics and benzodiazepines): acute dystonia: 1.1%, 95% CI 0.5–2.3 and 2.9%, CI 2.0–4.0; akathisia: 2.3%, CI 1.3–3.7 and 5.5%, CI 4.3–6.9; Parkinsonism: 2.9%, CI 1.8–4.4 and 7.8%, CI 6.4–9.4, respectively. Anticholinergic treatment was given to 12% IM olanzapine versus 31% non-olanzapine treated patients. Acute agitation after 24hours was reduced by 1.68 (95% CI 1.46–1.91) points on the Clinical Global Impression of Severity (CGI-S) in IM olanzapine patients and 1.51 (95% CI 1.30–1.73) points in non-olanzapine patients. Additional psychotropic medication was required for 90% of the patients during the first 24hours of treatment. Results provide naturalistic evidence for low EPS rates and improvement of agitation with IM psychotropic medications during acute states of patients suffering from acute mania or schizophrenia.
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Lemaire ON, Jespersen M, Wagner T. CO 2-Fixation Strategies in Energy Extremophiles: What Can We Learn From Acetogens? Front Microbiol 2020; 11:486. [PMID: 32318032 PMCID: PMC7146824 DOI: 10.3389/fmicb.2020.00486] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [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: 12/15/2019] [Accepted: 03/05/2020] [Indexed: 11/13/2022] Open
Abstract
Domestication of CO2-fixation became a worldwide priority enhanced by the will to convert this greenhouse gas into fuels and valuable chemicals. Because of its high stability, CO2-activation/fixation represents a true challenge for chemists. Autotrophic microbial communities, however, perform these reactions under standard temperature and pressure. Recent discoveries shine light on autotrophic acetogenic bacteria and hydrogenotrophic methanogens, as these anaerobes use a particularly efficient CO2-capture system to fulfill their carbon and energy needs. While other autotrophs assimilate CO2 via carboxylation followed by a reduction, acetogens and methanogens do the opposite. They first generate formate and CO by CO2-reduction, which are subsequently fixed to funnel the carbon toward their central metabolism. Yet their CO2-reduction pathways, with acetate or methane as end-products, constrain them to thrive at the "thermodynamic limits of Life". Despite this energy restriction acetogens and methanogens are growing at unexpected fast rates. To overcome the thermodynamic barrier of CO2-reduction they apply different ingenious chemical tricks such as the use of flavin-based electron-bifurcation or coupled reactions. This mini-review summarizes the current knowledge gathered on the CO2-fixation strategies among acetogens. While extensive biochemical characterization of the acetogenic formate-generating machineries has been done, there is no structural data available. Based on their shared mechanistic similarities, we apply the structural information obtained from hydrogenotrophic methanogens to highlight common features, as well as the specific differences of their CO2-fixation systems. We discuss the consequences of their CO2-reduction strategies on the evolution of Life, their wide distribution and their impact in biotechnological applications.
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Affiliation(s)
- Olivier N Lemaire
- Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Marion Jespersen
- Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, Bremen, Germany
| | - Tristan Wagner
- Microbial Metabolism Group, Max Planck Institute for Marine Microbiology, Bremen, Germany
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