1
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Ostendorf L, Muench F, Thormählen L, Galbavý Z, Körner R, Nee J, Schneider U. Rescue combination treatment of anti-MDA5-associated ARDS with daratumumab. RMD Open 2023; 9:e003238. [PMID: 37479497 PMCID: PMC10364176 DOI: 10.1136/rmdopen-2023-003238] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2023] [Indexed: 07/23/2023] Open
Affiliation(s)
- Lennard Ostendorf
- Department of Nephrology and Medical Intensive Care, Charite Universitatsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
- Deutsches Rheuma-Forschungszentrum (DRFZ), an Institute of the Leibniz Association, Berlin, Germany
- BIH Biomedical Innovation Academy, BIH Charité Junior Clinician Scientist Program, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Frédéric Muench
- Department of Nephrology and Medical Intensive Care, Charite Universitatsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Lena Thormählen
- Deutsches Herzzentrum der Charité - Medical Heart Center of Charité and German Heart Institute, Berlin, Germany
| | - Zaza Galbavý
- Department of Emergency and Acute Medicine, Campus Mitte and Virchow, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Roland Körner
- Department of Nephrology and Medical Intensive Care, Charite Universitatsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Jens Nee
- Department of Nephrology and Medical Intensive Care, Charite Universitatsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - Udo Schneider
- Department of Rheumatology and Clinical Immunology, Campus Mitte and Virchow, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
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2
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Klocke J, Kim SJ, Skopnik CM, Hinze C, Boltengagen A, Metzke D, Grothgar E, Prskalo L, Wagner L, Freund P, Görlich N, Muench F, Schmidt-Ott KM, Mashreghi MF, Kocks C, Eckardt KU, Rajewsky N, Enghard P. Urinary single-cell sequencing captures kidney injury and repair processes in human acute kidney injury. Kidney Int 2022; 102:1359-1370. [PMID: 36049643 DOI: 10.1016/j.kint.2022.07.032] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 03/03/2022] [Revised: 07/06/2022] [Accepted: 07/27/2022] [Indexed: 01/12/2023]
Abstract
Acute kidney injury (AKI) is a major health issue, the outcome of which depends primarily on damage and reparative processes of tubular epithelial cells. Mechanisms underlying AKI remain incompletely understood, specific therapies are lacking and monitoring the course of AKI in clinical routine is confined to measuring urine output and plasma levels of filtration markers. Here we demonstrate feasibility and potential of a novel approach to assess the cellular and molecular dynamics of AKI by establishing a robust urine-to-single cell RNA sequencing (scRNAseq) pipeline for excreted kidney cells via flow cytometry sorting. We analyzed 42,608 single cell transcriptomes of 40 urine samples from 32 patients with AKI and compared our data with reference material from human AKI post-mortem biopsies and published mouse data. We demonstrate that tubular epithelial cells transcriptomes mirror kidney pathology and reflect distinct injury and repair processes, including oxidative stress, inflammation, and tissue rearrangement. We also describe an AKI-specific abundant urinary excretion of adaptive progenitor-like cells. Thus, single cell transcriptomics of kidney cells excreted in urine provides noninvasive, unprecedented insight into cellular processes underlying AKI, thereby opening novel opportunities for target identification, AKI sub-categorization, and monitoring of natural disease course and interventions.
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Affiliation(s)
- Jan Klocke
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany.
| | - Seung Joon Kim
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Christopher M Skopnik
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Christian Hinze
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Molecular and Translational Kidney Research, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany; Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Anastasiya Boltengagen
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Diana Metzke
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Emil Grothgar
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Luka Prskalo
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Leonie Wagner
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Paul Freund
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Nina Görlich
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Frédéric Muench
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Kai M Schmidt-Ott
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Molecular and Translational Kidney Research, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany; Department of Nephrology and Hypertension, Hannover Medical School, Hannover, Germany
| | - Mir-Farzin Mashreghi
- Therapeutic Gene Regulation, Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
| | - Christine Kocks
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Kai-Uwe Eckardt
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Nikolaus Rajewsky
- Systems Biology of Gene-Regulatory Elements, Berlin Institute for Medical Systems Biology (BIMSB), Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), Berlin, Germany
| | - Philipp Enghard
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin, Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany; Deutsches Rheuma-Forschungszentrum, an Institute of the Leibniz Foundation, Berlin, Germany
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3
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Osmanodja B, Muench F, Holderied A, Budde K, Fischer T, Lerchbaumer MH. Assessment of Renal Transplant Perfusion by Contrast-Enhanced Ultrasound after Switch from Calcineurin Inhibitor to Belatacept: A Pilot Study. J Clin Med 2022; 11:jcm11154354. [PMID: 35955971 PMCID: PMC9368965 DOI: 10.3390/jcm11154354] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 07/16/2022] [Accepted: 07/25/2022] [Indexed: 02/01/2023] Open
Abstract
Calcineurin inhibitors (CNIs) have improved short-term kidney allograft survival but are nephrotoxic and vasoconstrictive. Vasoconstriction is potentially reversible after switching from CNIs to belatacept. The kidney allograft shows optimal requirements for dynamic perfusion imaging using contrast-enhanced ultrasound (CEUS). We performed standardized CEUS in patients after switching from CNIs to belatacept for clinical indication to study the suitability of CEUS, in order to assess the effects of CNI cessation on kidney allograft perfusion. Eleven kidney transplant patients were enrolled from February 2020 until November 2020. Demographic, clinical, and laboratory parameters, as well as perfusion imaging, were assessed at baseline and 6 months after switching immunosuppression. Quantification of perfusion imaging on CEUS was performed using a post-processing software tool on uncompressed DICOM cine loops. After CNI cessation, estimated glomerular filtration rate increased by 4.8 mL/min/1.73 m2 (16%). Despite good quality of fit and comparable regions of interest in baseline and follow-up CEUS examinations, quantification of perfusion imaging showed a slightly improved cortical perfusion without reaching statistical significance after CNI cessation. This is the first study that systematically investigates the suitability of CEUS to detect changes of microvascular perfusion in kidney transplant recipients in vivo. No significant differences could be detected in perfusion measurements before and after CNI cessation.
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Affiliation(s)
- Bilgin Osmanodja
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; (F.M.); (A.H.); (K.B.)
- Correspondence: ; Tel.: +49-30-450-614-368
| | - Frédéric Muench
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; (F.M.); (A.H.); (K.B.)
| | - Alexander Holderied
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; (F.M.); (A.H.); (K.B.)
| | - Klemens Budde
- Department of Nephrology and Medical Intensive Care, Charité–Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; (F.M.); (A.H.); (K.B.)
| | - Thomas Fischer
- Department of Radiology, Charité–Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; (T.F.); (M.H.L.)
| | - Markus Herbert Lerchbaumer
- Department of Radiology, Charité–Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; (T.F.); (M.H.L.)
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4
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Hossain UH, Jantsen G, Muench F, Kunz U, Ensinger W. Increasing the structural and compositional diversity of ion-track templated 1D nanostructures through multistep etching, plastic deformation, and deposition. Nanotechnology 2022; 33:245603. [PMID: 35235910 DOI: 10.1088/1361-6528/ac59e5] [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] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Ion-track etching represents a highly versatile way of introducing artificial pores with diameters down into the nm-regime into polymers, which offers considerable synthetic flexibility in template-assisted nanofabrication schemes. While the mechanistic foundations of ion-track technology are well understood, its potential for creating structurally and compositionally complex nano-architectures is far from being fully tapped. In this study, we showcase different strategies to expand the synthetic repertoire of ion-track membrane templating by creating several new 1D nanostructures, namely metal nanotubes of elliptical cross-section, funnel-shaped nanotubes optionally overcoated with titania or nickel nanospike layers, and concentrical as well as stacked metal nanotube-nanowire heterostructures. These nano-architectures are obtained solely by applying different wet-chemical deposition methods (electroless plating, electrodeposition, and chemical bath deposition) to ion-track etched polycarbonate templates, whose pore geometry is modified through plastic deformation, consecutive etching steps under differing conditions, and etching steps intermitted by spatially confined deposition, providing new motifs for nanoscale replication.
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Affiliation(s)
- U H Hossain
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - G Jantsen
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - F Muench
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - U Kunz
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
| | - W Ensinger
- Technische Universität Darmstadt, Department of Materials Science, Materials Analysis, Alarich-Weiss-Str.2, D-64287 Darmstadt, Germany
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5
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Lerchbaumer MH, Lauryn JH, Bachmann U, Enghard P, Fischer T, Grune J, Hegemann N, Khadzhynov D, Kruse JM, Lehner LJ, Lindner T, Oezkan T, Zickler D, Kuebler WM, Hamm B, Eckardt KU, Muench F. Point-of-care lung ultrasound in COVID-19 patients: inter- and intra-observer agreement in a prospective observational study. Sci Rep 2021; 11:10678. [PMID: 34021219 PMCID: PMC8139973 DOI: 10.1038/s41598-021-90153-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [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: 11/17/2020] [Accepted: 05/07/2021] [Indexed: 12/15/2022] Open
Abstract
With an urgent need for bedside imaging of coronavirus disease 2019 (COVID-19), this study’s main goal was to assess inter- and intraobserver agreement in lung ultrasound (LUS) of COVID-19 patients. In this single-center study we prospectively acquired and evaluated 100 recorded ten-second cine-loops in confirmed COVID-19 intensive care unit (ICU) patients. All loops were rated by ten observers with different subspeciality backgrounds for four times by each observer (400 loops overall) in a random sequence using a web-based rating tool. We analyzed inter- and intraobserver variability for specific pathologies and a semiquantitative LUS score. Interobserver agreement for both, identification of specific pathologies and assignment of LUS scores was fair to moderate (e.g., LUS score 1 Fleiss’ κ = 0.27; subpleural consolidations Fleiss’ κ = 0.59). Intraobserver agreement was mostly moderate to substantial with generally higher agreement for more distinct findings (e.g., lowest LUS score 0 vs. highest LUS score 3 (median Fleiss’ κ = 0.71 vs. 0.79) or air bronchograms (median Fleiss’ κ = 0.72)). Intraobserver consistency was relatively low for intermediate LUS scores (e.g. LUS Score 1 median Fleiss’ κ = 0.52). We therefore conclude that more distinct LUS findings (e.g., air bronchograms, subpleural consolidations) may be more suitable for disease monitoring, especially with more than one investigator and that training material used for LUS in point-of-care ultrasound (POCUS) should pay refined attention to areas such as B-line quantification and differentiation of intermediate LUS scores.
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Affiliation(s)
- Markus H Lerchbaumer
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany
| | - Jonathan H Lauryn
- Institute of Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany
| | - Ulrike Bachmann
- Department of Emergency Medicine (CVK, CCM), Charité - Universitätsmedizin, Berlin, Germany
| | - Philipp Enghard
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Thomas Fischer
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany
| | - Jana Grune
- Institute of Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany.,Center for Systems Biology, Massachusetts General Hospital Research Institute, Harvard Medical School, Boston, USA
| | - Niklas Hegemann
- Institute of Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany
| | - Dmytro Khadzhynov
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Jan Matthias Kruse
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Lukas J Lehner
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Tobias Lindner
- Department of Emergency Medicine (CVK, CCM), Charité - Universitätsmedizin, Berlin, Germany
| | - Timur Oezkan
- Department of Emergency Medicine (CVK, CCM), Charité - Universitätsmedizin, Berlin, Germany
| | - Daniel Zickler
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Wolfgang M Kuebler
- Institute of Physiology, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany.,German Center for Cardiovascular Research (DZHK), Partner Site, Berlin, Germany.,The Keenan Research Centre for Biomedical Science at St. Michael´S, Toronto, Canada.,Departments of Surgery and Physiology, University of Toronto, Toronto, Canada
| | - Bernd Hamm
- Department of Radiology, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität Zu Berlin, Berlin, Germany
| | - Kai-Uwe Eckardt
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany
| | - Frédéric Muench
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Charitéplatz 1, 10117, Berlin, Germany.
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6
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Al-Wakeel-Marquard N, Rastin S, Muench F, O H-Ici D, Yilmaz S, Berger F, Kuehne T, Messroghli DR. Cardiac T1 mapping in congenital heart disease: bolus vs. infusion protocols for measurements of myocardial extracellular volume fraction. Int J Cardiovasc Imaging 2017; 33:1961-1968. [PMID: 28620681 DOI: 10.1007/s10554-017-1191-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 06/09/2017] [Indexed: 11/28/2022]
Abstract
Myocardial extracellular volume fraction (ECV) reflecting diffuse myocardial fibrosis can be measured with T1 mapping cardiovascular magnetic resonance (CMR) before and after the application of a gadolinium-based extracellular contrast agent. The equilibrium between blood and myocardium contrast concentration required for ECV measurements can be obtained with a primed contrast infusion (equilibrium contrast-CMR). We hypothesized that equilibrium can also be achieved with a single contrast bolus to accurately measure diffuse myocardial fibrosis in patients with congenital heart disease (CHD). Healthy controls (n = 17; median age 24.0 years) and patients with CHD (n = 19; 25.0 years) were prospectively enrolled. Using modified Look-Locker inversion recovery T1 mapping before, 15 min after bolus injection, and during constant infusion of gadolinium-DOTA, T1 values were obtained for blood pool and myocardium of the left ventricle (LV), the interventricular septum (IVS), and the right ventricle (RV) in a single midventricular plane in short axis or in transverse orientation. ECV of LV, IVS and RV by bolus-only and bolus-infusion correlated significantly in CHD patients (r = 0.94, 0.95, and 0.74; p < 0.01, respectively) and healthy controls (r = 0.96, 0.89, and 0.64; p < 0.05, respectively). Bland-Altman plots revealed no significant bias between the techniques for any of the analyzed regions. ECV of LV and RV myocardium measured by bolus-only T1 mapping agrees well with bolus-infusion measurements in patients with CHD. The use of a bolus-only approach facilitates the integration of ECV measurements into existing CMR imaging protocols, allowing for assessment of diffuse myocardial fibrosis in CHD in clinical routine.
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Affiliation(s)
- Nadya Al-Wakeel-Marquard
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany.
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany.
| | - Sanaz Rastin
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Frédéric Muench
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
- Department of Internal Medicine - Cardiology, Deutsches Herzzentrum Berlin, Berlin, Germany
| | - Darach O H-Ici
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Sevim Yilmaz
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Felix Berger
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
- Department of Pediatrics, Division of Cardiology, Charité - Universitaetsmedizin Berlin, Berlin, Germany
| | - Titus Kuehne
- Department of Congenital Heart Disease - Pediatric Cardiology, Deutsches Herzzentrum Berlin, Augustenburger Platz 1, 13353, Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
- Department of Pediatrics, Division of Cardiology, Charité - Universitaetsmedizin Berlin, Berlin, Germany
| | - Daniel R Messroghli
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
- Department of Internal Medicine - Cardiology, Deutsches Herzzentrum Berlin, Berlin, Germany
- Department of Cardiology, Charité - Universitaetsmedizin Berlin, Berlin, Germany
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7
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Schaefer S, Felix EM, Muench F, Antoni M, Lohaus C, Brötz J, Kunz U, Gärtner I, Ensinger W. NiCo nanotubes plated on Pd seeds as a designed magnetically recollectable catalyst with high noble metal utilisation. RSC Adv 2016. [DOI: 10.1039/c6ra10235b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The tailored structure of a bifunctional, semi-homogeneous NiCo-nanotube catalyst system with embedded Pd nanoparticles, is synthesised by electroless plating.
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Affiliation(s)
- S. Schaefer
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - E.-M. Felix
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - F. Muench
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - M. Antoni
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - C. Lohaus
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - J. Brötz
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - U. Kunz
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
| | - I. Gärtner
- Technische Universität Darmstadt
- MPA/IfW Darmstadt
- 64283 Darmstadt
- Germany
| | - W. Ensinger
- Technische Universität Darmstadt
- Department of Materials Science
- 64287 Darmstadt
- Germany
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8
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Muench F, Retel J, Jeuthe S, O h-Ici D, van Rossum B, Wassilew K, Schmerler P, Kuehne T, Berger F, Oschkinat H, Messroghli DR. Alterations in creatine metabolism observed in experimental autoimmune myocarditis using ex vivo proton magic angle spinning MRS. NMR Biomed 2015; 28:1625-1633. [PMID: 26768489 DOI: 10.1002/nbm.3415] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 08/18/2015] [Accepted: 08/24/2015] [Indexed: 06/05/2023]
Abstract
Experimental autoimmune myocarditis (EAM) in rodents is an accepted model of myocarditis and dilated cardiomyopathy (DCM). Altered metabolism is thought to play an important role in the pathogenesis of DCM and heart failure (HF). Study of the metabolism may provide new diagnostic information and insights into the mechanisms of myocarditis and HF. Proton MRS ((1)H-MRS) has not yet been used to study the changes occurring in myocarditis and subsequent HF. We aimed to explore the changes in creatine metabolism using this model and compare them with the findings in healthy animals. Myocardial function of male young Lewis rats with EAM was quantified by performing left ventricular ejection fraction (LVEF) analysis in short-axis cine images throughout the whole heart. Inflammatory cellular infiltrate was assessed by immunohistochemistry. Myocardial tissue was analyzed using ex vivo proton magic angle spinning MRS ((1)H-MAS-MRS). Myocarditis was confirmed histologically by the presence of an inflammatory cellular infiltrate and CD68 positive staining. A significant increase in the metabolic ratio of Tau/tCr (taurine/total creatine) obtained by (1)H-MAS-MRS was observed in myocarditis compared with healthy controls (21 d acute EAM, 4.38 (±0.23); 21 d control, 2.84 (±0.08); 35 d chronic EAM, 4.47 (±0.83); 35 d control, 2.59 (±0.38); P < 0.001). LVEF was reduced in diseased animals (EAM, 55.2% (±11.3%); control, 72.6% (±3.8%); P < 0.01) and correlated with Tau/tCr ratio (R = 0.937, P < 0.001). Metabolic alterations occur acutely with the development of myocarditis. Myocardial Tau/tCr ratio as detected by (1)H-MRS correlates with LVEF and is able to differentiate between healthy myocardium and myocardium from rats with EAM.
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Affiliation(s)
- Frédéric Muench
- German Heart Institute Berlin, Department of Congenital Heart Disease and Pediatric Cardiology, Berlin, Germany
| | - Joren Retel
- Leibniz Institute for Molecular Pharmacology, Department of NMR-Supported Structural Biology, Berlin, Germany
| | - Sarah Jeuthe
- German Heart Institute Berlin, Department of Congenital Heart Disease and Pediatric Cardiology, Berlin, Germany
| | - Darach O h-Ici
- German Heart Institute Berlin, Department of Congenital Heart Disease and Pediatric Cardiology, Berlin, Germany
| | - Barth van Rossum
- Leibniz Institute for Molecular Pharmacology, Department of NMR-Supported Structural Biology, Berlin, Germany
| | - Katharina Wassilew
- German Heart Institute Berlin, Cardiovascular Pathology, Berlin, Germany
| | - Patrick Schmerler
- Charité-University Medicine, Center for Cardiovascular Research, Berlin, Germany
| | - Titus Kuehne
- German Heart Institute Berlin, Department of Congenital Heart Disease and Pediatric Cardiology, Berlin, Germany
| | - Felix Berger
- German Heart Institute Berlin, Department of Congenital Heart Disease and Pediatric Cardiology, Berlin, Germany
| | - Hartmut Oschkinat
- Leibniz Institute for Molecular Pharmacology, Department of NMR-Supported Structural Biology, Berlin, Germany
| | - Daniel R Messroghli
- German Heart Institute Berlin, Department of Congenital Heart Disease and Pediatric Cardiology, Berlin, Germany
- German Heart Institute Berlin, Department of Internal Medicine - Cardiology, Berlin, Germany
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Al-Wakeel N, Yilmaz S, Rastin S, Muench F, O h-Icí D, Berger F, Kuehne T, Messroghli D. T1-Mapping zur Bestimmung diffuser myokardialer Fibrose des rechten Ventrikels bei angeborenen Herzfehlern. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1555990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hossain UH, Muench F, Ensinger W. A comparative study on degradation characteristics of fluoropolymers irradiated by high energy heavy ions. RSC Adv 2014. [DOI: 10.1039/c4ra04635h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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Schmerler P, Jeuthe S, O h-Ici D, Wassilew K, Lauer D, Kaschina E, Kintscher U, Müller S, Muench F, Kuehne T, Berger F, Unger T, Steckelings UM, Paulis L, Messroghli D. Mortality and morbidity in different immunization protocols for experimental autoimmune myocarditis in rats. Acta Physiol (Oxf) 2014; 210:889-98. [PMID: 24410878 DOI: 10.1111/apha.12227] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 10/04/2013] [Accepted: 01/06/2014] [Indexed: 01/22/2023]
Abstract
AIM We aimed to investigate the histological and clinical presentations of experimental autoimmune myocarditis (EAM) induced by different immunization schemes. METHODS Male young Lewis rats were divided into five groups immunized by porcine myocardial myosin: subcutaneously (SC) 2 mg (in two 1-mg doses on day 0 and 7), 0 mg (sham group) subcutaneously into rear footpads (RF), 0.25 mg RF, 0.5 mg RF or 1 mg RF (all RF once on day 0). On day 21, left ventricular (LV) function was assessed by cardiac magnetic resonance imaging and cardiac catheterization. The type and degree of myocardial inflammatory infiltrates were determined by conventional histology and immunohistochemistry. RESULTS In the SC immunized rats and in the RF sham group, we observed 0% mortality, while in the actively RF immunized rats, mortality was 20, 20 and 44% for the 0.25 mg, 0.5 mg and 1 mg myosin doses respectively. Morbidity as defined by inflammatory infiltrates on haematoxylin and eosin (HE) staining was 22% in the SC immunized rats, 0% in the RF sham group and 100% in all actively RF immunized groups. We observed augmented relative ventricle weight and spleen weight, increased LV end-diastolic pressure, reduced LV developed pressure and reduced LV ejection fraction in all with myosin-immunized RF groups without any systematic dose effect. CONCLUSION Subcutaneous immunization to the neck and flanks did not induce a reproducible EAM, while RF myosin administration reliably led to EAM. Lower myosin doses seem to induce the complete histological and clinical picture of EAM while being associated with lower mortality, non-specific symptoms and animal distress.
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Affiliation(s)
- P. Schmerler
- Center for Cardiovascular Research; Charité-University Medicine; Berlin Germany
| | - S. Jeuthe
- Congenital Heart Disease and Pediatric Cardiology; German Heart Institute; Berlin Germany
| | - D. O h-Ici
- Congenital Heart Disease and Pediatric Cardiology; German Heart Institute; Berlin Germany
| | - K. Wassilew
- Department of Pathology; German Heart Institute; Berlin Germany
| | - D. Lauer
- Center for Cardiovascular Research; Charité-University Medicine; Berlin Germany
| | - E. Kaschina
- Center for Cardiovascular Research; Charité-University Medicine; Berlin Germany
| | - U. Kintscher
- Center for Cardiovascular Research; Charité-University Medicine; Berlin Germany
| | - S. Müller
- Experimental Neurology; Charité-University Medicine; Berlin Germany
| | - F. Muench
- Congenital Heart Disease and Pediatric Cardiology; German Heart Institute; Berlin Germany
| | - T. Kuehne
- Congenital Heart Disease and Pediatric Cardiology; German Heart Institute; Berlin Germany
| | - F. Berger
- Congenital Heart Disease and Pediatric Cardiology; German Heart Institute; Berlin Germany
| | - T. Unger
- CARIM-School for Cardiovascular Diseases; Maastricht University; Maastricht the Netherlands
| | - U. M. Steckelings
- Center for Cardiovascular Research; Charité-University Medicine; Berlin Germany
- Department of Cardiovascular and Renal Research; University of Southern Denmark; Odense Denmark
| | - L. Paulis
- Center for Cardiovascular Research; Charité-University Medicine; Berlin Germany
- Institute of Pathophysiology; Faculty of Medicine; Comenius University; Bratislava Slovak Republic
| | - D. Messroghli
- Congenital Heart Disease and Pediatric Cardiology; German Heart Institute; Berlin Germany
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Peter B, Melke J, Muench F, Ensinger W, Roth C. Stable platinum nanostructures on nitrogen-doped carbon obtained by high-temperature synthesis for use in PEMFC. J APPL ELECTROCHEM 2014. [DOI: 10.1007/s10800-014-0664-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Rauber M, Muench F, Toimil-Molares ME, Ensinger W. Thermal stability of electrodeposited platinum nanowires and morphological transformations at elevated temperatures. Nanotechnology 2012; 23:475710. [PMID: 23117337 DOI: 10.1088/0957-4484/23/47/475710] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Pt nanowires were prepared by template electrodeposition using ion track etched polymer membranes and analysed with respect to their thermal stability. Driven by Rayleigh instability, the polycrystalline Pt nanostructures experienced structural transformations and finally fragmented into linear chains of nanospheres at temperatures much below the melting point of bulk Pt. Morphological changes were systematically studied by electron microscopy and compared with previously reported results on other metal nanowires and theoretical predictions. In addition, nanowires could readily be interconnected to two-dimensional assemblies by taking advantage of the rapid diffusion processes. This study will help to predict the durability of integrated nanowires and contributes to the understanding of thermal-induced transformations for polycrystalline nanowires.
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Affiliation(s)
- M Rauber
- Department of Materials and Geo-Sciences, Technische Universität Darmstadt, Darmstadt, Germany.
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