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Neumann B, Vink AS, Hermans BJM, Lieve KVV, Cömert D, Beckmann BM, Clur SAB, Blom NA, Delhaas T, Wilde AAM, Kääb S, Postema PG, Sinner MF. Manual vs. automatic assessment of the QT-interval and corrected QT. Europace 2023; 25:euad213. [PMID: 37470430 PMCID: PMC10469369 DOI: 10.1093/europace/euad213] [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: 04/10/2023] [Revised: 05/29/2023] [Accepted: 06/29/2023] [Indexed: 07/21/2023] Open
Abstract
AIMS Sudden cardiac death (SCD) is challenging to predict. Electrocardiogram (ECG)-derived heart rate-corrected QT-interval (QTc) is used for SCD-risk assessment. QTc is preferably determined manually, but vendor-provided automatic results from ECG recorders are convenient. Agreement between manual and automatic assessments is unclear for populations with aberrant QTc. We aimed to systematically assess pairwise agreement of automatic and manual QT-intervals and QTc. METHODS AND RESULTS A multi-centre cohort enriching aberrant QTc comprised ECGs of healthy controls and long-QT syndrome (LQTS) patients. Manual QT-intervals and QTc were determined by the tangent and threshold methods and compared to automatically generated, vendor-provided values. We assessed agreement globally by intra-class correlation coefficients and pairwise by Bland-Altman analyses and 95% limits of agreement (LoA). Further, manual results were compared to a novel automatic QT-interval algorithm. ECGs of 1263 participants (720 LQTS patients; 543 controls) were available [median age 34 (inter-quartile range 35) years, 55% women]. Comparing cohort means, automatic and manual QT-intervals and QTc were similar. However, pairwise Bland-Altman-based agreement was highly discrepant. For QT-interval, LoAs spanned 95 (tangent) and 92 ms (threshold), respectively. For QTc, the spread was 108 and 105 ms, respectively. LQTS patients exhibited more pronounced differences. For automatic QTc results from 440-540 ms (tangent) and 430-530 ms (threshold), misassessment risk was highest. Novel automatic QT-interval algorithms may narrow this range. CONCLUSION Pairwise vendor-provided automatic and manual QT-interval and QTc results can be highly discrepant. Novel automatic algorithms may improve agreement. Within the above ranges, automatic QT-interval and QTc results require manual confirmation, particularly if T-wave morphology is challenging.
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Affiliation(s)
- Benjamin Neumann
- Department of Medicine I, LMU University Hospital, LMU Munich, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - A Suzanne Vink
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Heart Center, Amsterdam, The Netherlands
- Department of Pediatric Cardiology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Ben J M Hermans
- Department of Biomedical Engineering, Maastricht University, Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Krystien V V Lieve
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Heart Center, Amsterdam, The Netherlands
| | - Didem Cömert
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Heart Center, Amsterdam, The Netherlands
| | - Britt-Maria Beckmann
- Department of Medicine I, LMU University Hospital, LMU Munich, Munich, Germany
- Department of Legal Medicine, Goethe Univeristy, University Hospital Frankfurt, Frankfurt am Main, Germany
| | - Sally-Ann B Clur
- Department of Pediatric Cardiology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Nico A Blom
- Department of Pediatric Cardiology, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Department of Pediatric Cardiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Tammo Delhaas
- Department of Biomedical Engineering, Maastricht University, Maastricht, The Netherlands
- Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, Maastricht, The Netherlands
| | - Arthur A M Wilde
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Heart Center, Amsterdam, The Netherlands
- Department of Pediatric Cardiology, Leiden University Medical Center, Leiden, The Netherlands
- Princess Al-Jawhara Al-Brahim Center of Excellence in Research of Hereditary Disorders, Jeddah, Kingdom of Saudi Arabia
- European Reference Network for Rare, Low Prevalence and Complex Diseases of the Heart (ERN GUARD-Heart), Amsterdam University Medical Center, Amsterdam, The Netherlands
| | - Stefan Kääb
- Department of Medicine I, LMU University Hospital, LMU Munich, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - Pieter G Postema
- Department of Clinical and Experimental Cardiology, Amsterdam UMC, University of Amsterdam, Heart Center, Amsterdam, The Netherlands
| | - Moritz F Sinner
- Department of Medicine I, LMU University Hospital, LMU Munich, Munich, Germany
- German Centre for Cardiovascular Research (DZHK), partner site: Munich Heart Alliance, Munich, Germany
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Shoemaker MB, Husser D, Roselli C, Al Jazairi M, Chrispin J, Kühne M, Neumann B, Knight S, Sun H, Mohanty S, Shaffer C, Thériault S, Rinke LL, Siland JE, Crawford DM, Ueberham L, Zardkoohi O, Büttner P, Geelhoed B, Blum S, Aeschbacher S, Smith JD, Van Wagoner DR, Freudling R, Müller-Nurasyid M, Montgomery J, Yoneda Z, Wells Q, Issa T, Weeke P, Jacobs V, Van Gelder IC, Hindricks G, Barnard J, Calkins H, Darbar D, Michaud G, Kääb S, Ellinor P, Natale A, Chung M, Nazarian S, Cutler MJ, Sinner MF, Conen D, Rienstra M, Bollmann A, Roden DM, Lubitz S. Genetic Susceptibility for Atrial Fibrillation in Patients Undergoing Atrial Fibrillation Ablation. Circ Arrhythm Electrophysiol 2020; 13:e007676. [PMID: 32078373 DOI: 10.1161/circep.119.007676] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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] [Indexed: 11/16/2022]
Abstract
BACKGROUND Ablation is a widely used therapy for atrial fibrillation (AF); however, arrhythmia recurrence and repeat procedures are common. Studies examining surrogate markers of genetic susceptibility to AF, such as family history and individual AF susceptibility alleles, suggest these may be associated with recurrence outcomes. Accordingly, the aim of this study was to test the association between AF genetic susceptibility and recurrence after ablation using a comprehensive polygenic risk score for AF. METHODS Ten centers from the AF Genetics Consortium identified patients who had undergone de novo AF ablation. AF genetic susceptibility was measured using a previously described polygenic risk score (N=929 single-nucleotide polymorphisms) and tested for an association with clinical characteristics and time-to-recurrence with a 3 month blanking period. Recurrence was defined as >30 seconds of AF, atrial flutter, or atrial tachycardia. Multivariable analysis adjusted for age, sex, height, body mass index, persistent AF, hypertension, coronary disease, left atrial size, left ventricular ejection fraction, and year of ablation. RESULTS Four thousand two hundred seventy-six patients were eligible for analysis of baseline characteristics and 3259 for recurrence outcomes. The overall arrhythmia recurrence rate between 3 and 12 months was 44% (1443/3259). Patients with higher AF genetic susceptibility were younger (P<0.001) and had fewer clinical risk factors for AF (P=0.001). Persistent AF (hazard ratio [HR], 1.39 [95% CI, 1.22-1.58]; P<0.001), left atrial size (per cm: HR, 1.32 [95% CI, 1.19-1.46]; P<0.001), and left ventricular ejection fraction (per 10%: HR, 0.88 [95% CI, 0.80-0.97]; P=0.008) were associated with increased risk of recurrence. In univariate analysis, higher AF genetic susceptibility trended towards a higher risk of recurrence (HR, 1.08 [95% CI, 0.99-1.18]; P=0.07), which became less significant in multivariable analysis (HR, 1.06 [95% CI, 0.98-1.15]; P=0.13). CONCLUSIONS Higher AF genetic susceptibility was associated with younger age and fewer clinical risk factors but not recurrence. Arrhythmia recurrence after AF ablation may represent a genetically different phenotype compared to AF susceptibility.
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Affiliation(s)
- M Benjamin Shoemaker
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Daniela Husser
- Heart Center Leipzig, Department of Electrophysiology, Leipzig Heart Institute, University of Leipzig, Germany (D.H., L.U., P.B., G.H., A.B.)
| | - Carolina Roselli
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Program in Medical and Population Genetics, Cambridge, MA (C.R., P.E., S.L.)
| | - Meelad Al Jazairi
- Department of Cardiology, University of Groningen, University Medical Center Groningen, the Netherlands (M.A.J., J.E.S., B.G., I.C.V.G., M.R.)
| | - Jonathan Chrispin
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD (J.C., H.C.)
| | - Michael Kühne
- University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.).,Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.)
| | - Benjamin Neumann
- Department of Medicine, University Hospital Munich, Ludwig Maximilians University of Munich, Germany (B.N., R.F., S. Kääb, M.F.S.)
| | - Stacey Knight
- Intermountain Heart Institute, Intermountain Medical Center, Murray (S. Knight, V.J.).,Department of Medicine, University of Utah, Salt Lake City (S. Knight)
| | - Han Sun
- Department of Quantitative Health Sciences (H.S., J.B.), Lerner Research Institute, Cleveland Clinic, OH
| | - Sanghamitra Mohanty
- Texas Cardiac Arrhythmia Institute, Austin, TX (S.M., A.N.).,Department of Internal Medicine, Dell Medical School, Austin, TX (S.M., A.N.)
| | - Christian Shaffer
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Sébastien Thériault
- Population Health Research Institute, McMaster University, Hamilton, ON, Canada (S.T., D.C.).,Department of Molecular Biology, Medical Biochemistry and Pathology, Laval University, Quebec City, Canada (S.T.)
| | - Lauren Lee Rinke
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Joylene E Siland
- Department of Cardiology, University of Groningen, University Medical Center Groningen, the Netherlands (M.A.J., J.E.S., B.G., I.C.V.G., M.R.)
| | - Diane M Crawford
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Laura Ueberham
- Heart Center Leipzig, Department of Electrophysiology, Leipzig Heart Institute, University of Leipzig, Germany (D.H., L.U., P.B., G.H., A.B.)
| | - Omeed Zardkoohi
- Departments of Cardiovascular Medicine and Molecular Cardiology, Heart and Vascular Institute (O.Z., M.C.), Lerner Research Institute, Cleveland Clinic, OH
| | - Petra Büttner
- Heart Center Leipzig, Department of Electrophysiology, Leipzig Heart Institute, University of Leipzig, Germany (D.H., L.U., P.B., G.H., A.B.)
| | - Bastiaan Geelhoed
- Department of Cardiology, University of Groningen, University Medical Center Groningen, the Netherlands (M.A.J., J.E.S., B.G., I.C.V.G., M.R.)
| | - Steffen Blum
- University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.).,Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.)
| | - Stefanie Aeschbacher
- University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.).,Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.)
| | - Jonathan D Smith
- Department of Cellular and Molecular Medicine (J.D.S.), Lerner Research Institute, Cleveland Clinic, OH
| | - David R Van Wagoner
- Department of Molecular Cardiology (D.R.V.W.), Lerner Research Institute, Cleveland Clinic, OH
| | - Rebecca Freudling
- Department of Medicine, University Hospital Munich, Ludwig Maximilians University of Munich, Germany (B.N., R.F., S. Kääb, M.F.S.).,Institute of Genetic Epidemiology, Helmholtz Zentrum München, Neuherberg (R.F., M.M.-N.)
| | - Martina Müller-Nurasyid
- Institute of Genetic Epidemiology, Helmholtz Zentrum München, Neuherberg (R.F., M.M.-N.).,German Centre for Cardiovascular Research (DZHK), partner site: Munich Heart Alliance, Germany (M.M.-N., S. Kääb, M.F.S.)
| | - Jay Montgomery
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Zachary Yoneda
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Quinn Wells
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Tariq Issa
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Peter Weeke
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Victoria Jacobs
- Intermountain Heart Institute, Intermountain Medical Center, Murray (S. Knight, V.J.)
| | - Isabelle C Van Gelder
- Department of Cardiology, University of Groningen, University Medical Center Groningen, the Netherlands (M.A.J., J.E.S., B.G., I.C.V.G., M.R.)
| | - Gerhard Hindricks
- Heart Center Leipzig, Department of Electrophysiology, Leipzig Heart Institute, University of Leipzig, Germany (D.H., L.U., P.B., G.H., A.B.)
| | - John Barnard
- Department of Quantitative Health Sciences (H.S., J.B.), Lerner Research Institute, Cleveland Clinic, OH
| | - Hugh Calkins
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, MD (J.C., H.C.)
| | - Dawood Darbar
- Division of Cardiology, Department of Medicine, University of Illinois Health, Chicago (D.D.)
| | - Greg Michaud
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN (M.B.S., C.S., L.L.R., D.M.C., J.M., Z.Y., Q.W., T.I., P.W., G.M.)
| | - Stefan Kääb
- Department of Medicine, University Hospital Munich, Ludwig Maximilians University of Munich, Germany (B.N., R.F., S. Kääb, M.F.S.).,German Centre for Cardiovascular Research (DZHK), partner site: Munich Heart Alliance, Germany (M.M.-N., S. Kääb, M.F.S.)
| | - Patrick Ellinor
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Program in Medical and Population Genetics, Cambridge, MA (C.R., P.E., S.L.).,Massachusetts General Hospital, Cardiac Arrhythmia Service, Boston (P.E., S.L.)
| | - Andrea Natale
- Texas Cardiac Arrhythmia Institute, Austin, TX (S.M., A.N.).,Department of Internal Medicine, Dell Medical School, Austin, TX (S.M., A.N.).,Scripps Clinic, Interventional Electrophysiology, San Diego, CA (A.N.).,Division of Cardiology, Stanford University, Palo Alto, CA (A.N.).,Case Western University, Cleveland, OH (A.N.)
| | - Mina Chung
- Departments of Cardiovascular Medicine and Molecular Cardiology, Heart and Vascular Institute (O.Z., M.C.), Lerner Research Institute, Cleveland Clinic, OH
| | - Saman Nazarian
- Division of Cardiology, University of Pennsylvania Perelman School of Medicine, Philadelphia (S.N.)
| | - Michael J Cutler
- Intermountain Heart Institute, Intermountain Medical Center, Murray, UT (M.J.C.)
| | - Moritz F Sinner
- Department of Medicine, University Hospital Munich, Ludwig Maximilians University of Munich, Germany (B.N., R.F., S. Kääb, M.F.S.).,German Centre for Cardiovascular Research (DZHK), partner site: Munich Heart Alliance, Germany (M.M.-N., S. Kääb, M.F.S.)
| | - David Conen
- University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.).,Cardiovascular Research Institute Basel, University Hospital Basel, Switzerland (M.K., S.B., S.A., D.C.).,Population Health Research Institute, McMaster University, Hamilton, ON, Canada (S.T., D.C.)
| | - Michiel Rienstra
- Department of Cardiology, University of Groningen, University Medical Center Groningen, the Netherlands (M.A.J., J.E.S., B.G., I.C.V.G., M.R.)
| | - Andreas Bollmann
- Heart Center Leipzig, Department of Electrophysiology, Leipzig Heart Institute, University of Leipzig, Germany (D.H., L.U., P.B., G.H., A.B.)
| | - Dan M Roden
- Animal, Dairy, and Veterinary Sciences, Utah State University, Logan (D.M.R.)
| | - Steven Lubitz
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Program in Medical and Population Genetics, Cambridge, MA (C.R., P.E., S.L.).,Massachusetts General Hospital, Cardiac Arrhythmia Service, Boston (P.E., S.L.)
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Vink AS, Neumann B, Lieve KVV, Sinner MF, Hofman N, El Kadi S, Schoenmaker MHA, Slaghekke HMJ, de Jong JSSG, Clur SAB, Blom NA, Kääb S, Wilde AAM, Postema PG. Determination and Interpretation of the QT Interval. Circulation 2019; 138:2345-2358. [PMID: 30571576 DOI: 10.1161/circulationaha.118.033943] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [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] [Indexed: 12/19/2022]
Abstract
BACKGROUND Long QT syndrome (LQTS) is associated with potentially fatal arrhythmias. Treatment is very effective, but its diagnosis may be challenging. Importantly, different methods are used to assess the QT interval, which makes its recognition difficult. QT experts advocate manual measurements with the tangent or threshold method. However, differences between these methods and their performance in LQTS diagnosis have not been established. We aimed to assess similarities and differences between these 2 methods for QT interval analysis to aid in accurate QT assessment for LQTS. METHODS Patients with a confirmed pathogenic variant in KCNQ1(LQT1), KCNH2(LQT2), or SCN5A(LQT3) genes and their family members were included. Genotype-positive patients were identified as LQTS cases and genotype-negative family members as controls. ECGs were analyzed with both methods, providing inter- and intrareader validity and diagnostic accuracy. Cutoff values based on control population's 95th and 99th percentiles, and LQTS-patients' 1st and 5th percentiles were established based on the method to correct for heart rate, age, and sex. RESULTS We included 1484 individuals from 265 families, aged 33±21 years and 55% females. In the total cohort, QTTangent was 10.4 ms shorter compared with QTThreshold (95% limits of agreement±20.5 ms, P<0.0001). For all genotypes, QTTangent was shorter than QTThreshold ( P<0.0001), but this was less pronounced in LQT2. Both methods yielded a high inter- and intrareader validity (intraclass correlation coefficient >0.96), and a high diagnostic accuracy (area under the curve >0.84). Using the current guideline cutoff (QTc interval 480 ms), both methods had similar specificity but yielded a different sensitivity. QTc interval cutoff values of QTTangent were lower compared with QTThreshold and different depending on the correction for heart rate, age, and sex. CONCLUSION The QT interval varies depending on the method used for its assessment, yet both methods have a high validity and can both be used in diagnosing LQTS. However, for diagnostic purposes current guideline cutoff values yield different results for these 2 methods and could result in inappropriate reassurance or treatment. Adjusted cutoff values are therefore specified for method, correction formula, age, and sex. In addition, a freely accessible online probability calculator for LQTS ( www.QTcalculator.org ) has been made available as an aid in the interpretation of the QT interval.
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Affiliation(s)
- Arja Suzanne Vink
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands.,Department of Pediatric Cardiology, Emma Children's Hospital (A.S.V., S.-A.B.C., N.A.B.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Benjamin Neumann
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Germany (B.N., M.F.S., S.K.)
| | - Krystien V V Lieve
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Moritz F Sinner
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Germany (B.N., M.F.S., S.K.).,Princess Al-Jawhara Al-Brahim Center of Excellence in Research of Hereditary Disorders, Jeddah, Kingdom of Saudi Arabia (M.F.S., A.A.M.W.)
| | - Nynke Hofman
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Soufiane El Kadi
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Melissa H A Schoenmaker
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Hanneke M J Slaghekke
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | | | - Sally-Ann B Clur
- Department of Pediatric Cardiology, Emma Children's Hospital (A.S.V., S.-A.B.C., N.A.B.), Amsterdam UMC, University of Amsterdam, The Netherlands
| | - Nico A Blom
- Department of Pediatric Cardiology, Emma Children's Hospital (A.S.V., S.-A.B.C., N.A.B.), Amsterdam UMC, University of Amsterdam, The Netherlands.,Department of Pediatric Cardiology, Leiden University Medical Center, The Netherlands (N.A.B.)
| | - Stefan Kääb
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Germany (B.N., M.F.S., S.K.).,German Cardiovascular Research Center (DZHK), Munich Heart Alliance, Germany (S.K.)
| | - Arthur A M Wilde
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands.,Princess Al-Jawhara Al-Brahim Center of Excellence in Research of Hereditary Disorders, Jeddah, Kingdom of Saudi Arabia (M.F.S., A.A.M.W.)
| | - Pieter G Postema
- Heart Center, Department of Clinical and Experimental Cardiology (A.S.V., K.V.V.L., N.H., S.e.K., M.H.A.S., H.M.J.S., A.A.M.W., P.G.P.), Amsterdam UMC, University of Amsterdam, The Netherlands
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4
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Siebermair J, Neumann B, Risch F, Riesinger L, Vonderlin N, Koehler M, Lackermaier K, Fichtner S, Rizas K, Sattler SM, Sinner MF, Kääb S, Estner HL, Wakili R. High-density Mapping Guided Pulmonary Vein Isolation for Treatment of Atrial Fibrillation - Two-year clinical outcome of a single center experience. Sci Rep 2019; 9:8830. [PMID: 31222008 PMCID: PMC6586935 DOI: 10.1038/s41598-019-45115-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Accepted: 05/29/2019] [Indexed: 11/11/2022] Open
Abstract
Pulmonary vein isolation (PVI) as interventional treatment for atrial fibrillation (AF) aims to eliminate arrhythmogenic triggers from the PVs. Improved signal detection facilitating a more robust electrical isolation might be associated with a better outcome. This retrospective cohort study compared PVI procedures using a novel high-density mapping system (HDM) with improved signal detection vs. age- and sex-matched PVIs using a conventional 3D mapping system (COM). Endpoints comprised freedom from AF and procedural parameters. In total, 108 patients (mean age 63.9 ± 11.2 years, 56.5% male, 50.9% paroxysmal AF) were included (n = 54 patients/group). Our analysis revealed that HDM was not superior regarding freedom from AF (mean follow-up of 494.7 ± 26.2 days), with one- and two-year AF recurrence rates of 38.9%/46.5% (HDM) and 38.9%/42.2% (COM), respectively. HDM was associated with reduction in fluoroscopy times (18.8 ± 10.6 vs. 29.8 ± 13.4 min; p < 0.01) and total radiation dose (866.0 ± 1003.3 vs. 1731.2 ± 1978.4 cGy; p < 0.01) compared to the COM group. HDM was equivalent but not superior to COM with respect to clinical outcome after PVI and resulted in reduced fluoroscopy time and radiation exposure. These results suggest that HDM-guided PVI is effective and safe for AF ablation. Potential benefits in comparison to conventional mapping systems, e.g. arrhythmia recurrence rates, have to be addressed in randomized trials.
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Affiliation(s)
- J Siebermair
- Department of Cardiology and Vascular Medicine, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany.,Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - B Neumann
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - F Risch
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany
| | - L Riesinger
- Department of Cardiology and Vascular Medicine, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany.,Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - N Vonderlin
- Department of Cardiology and Vascular Medicine, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - M Koehler
- Department of Cardiology and Vascular Medicine, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany
| | - K Lackermaier
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany
| | - S Fichtner
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany
| | - K Rizas
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - S M Sattler
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,Department of Cardiology, Heart Centre, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
| | - M F Sinner
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - S Kääb
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany.,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany
| | - H L Estner
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany
| | - R Wakili
- Department of Cardiology and Vascular Medicine, West-German Heart and Vascular Center, University Duisburg-Essen, Essen, Germany. .,Department of Medicine I, University Hospital Munich, Ludwig-Maximilians University, Munich, Germany. .,German Cardiovascular Research Center (DZHK), partner site: Munich Heart Alliance, Munich, Germany.
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5
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Seidel P, Konrad N, Negatsch V, Dezsö D, Kogan I, Gauger U, Neumann B, Voulgaris A, Opitz-Welke A. Corrigendum: Violent Behavior During Psychiatric Inpatient Treatment in a German Prison Hospital. Front Psychiatry 2019; 10:961. [PMID: 32009992 PMCID: PMC6978283 DOI: 10.3389/fpsyt.2019.00961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 12/04/2019] [Indexed: 12/04/2022] Open
Abstract
[This corrects the article DOI: 10.3389/fpsyt.2019.00762.].
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Affiliation(s)
- P Seidel
- Justizvollzugskrankenhaus, JVA Plötzensee, Berlin, Germany
| | - N Konrad
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - V Negatsch
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - D Dezsö
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - I Kogan
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - U Gauger
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - B Neumann
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - A Voulgaris
- Institut für Sexualforschung und Forensische Psychiatrie, Universitätsklinikum Hamburg Eppendorf, Hamburg, Germany
| | - A Opitz-Welke
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
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6
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Seidel P, Konrad N, Negatsch V, Dezsö D, Kogan I, Gauger U, Neumann B, Voulgaris A, Opitz-Welke A. Violent Behavior During Psychiatric Inpatient Treatment in a German Prison Hospital. Front Psychiatry 2019; 10:762. [PMID: 31736795 PMCID: PMC6836873 DOI: 10.3389/fpsyt.2019.00762] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 09/23/2019] [Indexed: 12/26/2022] Open
Abstract
Violent behavior in correctional facilities is common and differs substantially in type, target, implication, and trigger. Research on frequency and characteristics of violent behavior in correctional facilities and psychiatric hospitals is limited. Results from recent research suggest that comorbidity of severe mental disorder, personality disorder, and diagnosis of substance abuse is related to a higher risk of violent behavior. In the Berlin prison hospital, a database was created to collect data from all violent incidences (n=210) between 1997 and 2006 and between 2010 and 2016. In a retrospective, case-control study, we analyzed specific socioeconomic data and psychiatric diagnosis and compared the group of prisoners with violent behavior with randomly selected prisoners of the same department without violent behavior (n = 210). Diagnosis of schizophrenia, non-German nationality, no use of an interpreter, no children, and no previous sentence remained significantly associated with the dependent variable violent behavior. There were no significant differences regarding age and legal statuses. Practical implications for clinical work are discussed.
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Affiliation(s)
- P Seidel
- Justizvollzugskrankenhaus, JVA Plötzensee, Berlin, Germany
| | - N Konrad
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - V Negatsch
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - D Dezsö
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - I Kogan
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - U Gauger
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - B Neumann
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
| | - A Voulgaris
- Institut für Sexualforschung und Forensische Psychiatrie, Universitätsklinikum Hamburg Eppendorf, Hamburg, Germany
| | - A Opitz-Welke
- Institut für Forensische Psychiatrie, Charité, Berlin, Germany
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7
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Roselli C, Chaffin MD, Weng LC, Aeschbacher S, Ahlberg G, Albert CM, Almgren P, Alonso A, Anderson CD, Aragam KG, Arking DE, Barnard J, Bartz TM, Benjamin EJ, Bihlmeyer NA, Bis JC, Bloom HL, Boerwinkle E, Bottinger EB, Brody JA, Calkins H, Campbell A, Cappola TP, Carlquist J, Chasman DI, Chen LY, Chen YDI, Choi EK, Choi SH, Christophersen IE, Chung MK, Cole JW, Conen D, Cook J, Crijns HJ, Cutler MJ, Damrauer SM, Daniels BR, Darbar D, Delgado G, Denny JC, Dichgans M, Dörr M, Dudink EA, Dudley SC, Esa N, Esko T, Eskola M, Fatkin D, Felix SB, Ford I, Franco OH, Geelhoed B, Grewal RP, Gudnason V, Guo X, Gupta N, Gustafsson S, Gutmann R, Hamsten A, Harris TB, Hayward C, Heckbert SR, Hernesniemi J, Hocking LJ, Hofman A, Horimoto ARVR, Huang J, Huang PL, Huffman J, Ingelsson E, Ipek EG, Ito K, Jimenez-Conde J, Johnson R, Jukema JW, Kääb S, Kähönen M, Kamatani Y, Kane JP, Kastrati A, Kathiresan S, Katschnig-Winter P, Kavousi M, Kessler T, Kietselaer BL, Kirchhof P, Kleber ME, Knight S, Krieger JE, Kubo M, Launer LJ, Laurikka J, Lehtimäki T, Leineweber K, Lemaitre RN, Li M, Lim HE, Lin HJ, Lin H, Lind L, Lindgren CM, Lokki ML, London B, Loos RJF, Low SK, Lu Y, Lyytikäinen LP, Macfarlane PW, Magnusson PK, Mahajan A, Malik R, Mansur AJ, Marcus GM, Margolin L, Margulies KB, März W, McManus DD, Melander O, Mohanty S, Montgomery JA, Morley MP, Morris AP, Müller-Nurasyid M, Natale A, Nazarian S, Neumann B, Newton-Cheh C, Niemeijer MN, Nikus K, Nilsson P, Noordam R, Oellers H, Olesen MS, Orho-Melander M, Padmanabhan S, Pak HN, Paré G, Pedersen NL, Pera J, Pereira A, Porteous D, Psaty BM, Pulit SL, Pullinger CR, Rader DJ, Refsgaard L, Ribasés M, Ridker PM, Rienstra M, Risch L, Roden DM, Rosand J, Rosenberg MA, Rost N, Rotter JI, Saba S, Sandhu RK, Schnabel RB, Schramm K, Schunkert H, Schurman C, Scott SA, Seppälä I, Shaffer C, Shah S, Shalaby AA, Shim J, Shoemaker MB, Siland JE, Sinisalo J, Sinner MF, Slowik A, Smith AV, Smith BH, Smith JG, Smith JD, Smith NL, Soliman EZ, Sotoodehnia N, Stricker BH, Sun A, Sun H, Svendsen JH, Tanaka T, Tanriverdi K, Taylor KD, Teder-Laving M, Teumer A, Thériault S, Trompet S, Tucker NR, Tveit A, Uitterlinden AG, Van Der Harst P, Van Gelder IC, Van Wagoner DR, Verweij N, Vlachopoulou E, Völker U, Wang B, Weeke PE, Weijs B, Weiss R, Weiss S, Wells QS, Wiggins KL, Wong JA, Woo D, Worrall BB, Yang PS, Yao J, Yoneda ZT, Zeller T, Zeng L, Lubitz SA, Lunetta KL, Ellinor PT. Multi-ethnic genome-wide association study for atrial fibrillation. Nat Genet 2018; 50:1225-1233. [PMID: 29892015 PMCID: PMC6136836 DOI: 10.1038/s41588-018-0133-9] [Citation(s) in RCA: 442] [Impact Index Per Article: 73.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Accepted: 04/18/2018] [Indexed: 12/13/2022]
Abstract
Atrial fibrillation (AF) affects more than 33 million individuals worldwide1 and has a complex heritability2. We conducted the largest meta-analysis of genome-wide association studies (GWAS) for AF to date, consisting of more than half a million individuals, including 65,446 with AF. In total, we identified 97 loci significantly associated with AF, including 67 that were novel in a combined-ancestry analysis, and 3 that were novel in a European-specific analysis. We sought to identify AF-associated genes at the GWAS loci by performing RNA-sequencing and expression quantitative trait locus analyses in 101 left atrial samples, the most relevant tissue for AF. We also performed transcriptome-wide analyses that identified 57 AF-associated genes, 42 of which overlap with GWAS loci. The identified loci implicate genes enriched within cardiac developmental, electrophysiological, contractile and structural pathways. These results extend our understanding of the biological pathways underlying AF and may facilitate the development of therapeutics for AF.
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Affiliation(s)
- Carolina Roselli
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Mark D Chaffin
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Lu-Chen Weng
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
| | - Stefanie Aeschbacher
- University Hospital Basel, Basel, Switzerland
- Cardiovascular Research Institute Basel, Basel, Switzerland
| | - Gustav Ahlberg
- Laboratory for Molecular Cardiology, The Heart Centre, Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- The Danish National Research Foundation Centre for Cardiac Arrhythmia, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Christine M Albert
- Divisions of Preventive and Cardiovascular Medicine, Brigham and Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Peter Almgren
- Department of Clinical Sciences, Lund University, Malmo, Sweden
| | - Alvaro Alonso
- Department of Epidemiology, Rollins School of Public Health, Emory University, Atlanta, GA, USA
| | - Christopher D Anderson
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Krishna G Aragam
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Dan E Arking
- McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - John Barnard
- Departments of Cardiovascular Medicine, Cellular and Molecular Medicine, Molecular Cardiology, and Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA
| | - Traci M Bartz
- Cardiovascular Health Research Unit, Departments of Medicine and Biostatistics, University of Washington, Seattle, WA, USA
| | - Emelia J Benjamin
- NHLBI and Boston University's Framingham Heart Study, Framingham, MA, USA
- Department of Medicine, Boston University School of Medicine, Boston, MA, USA
- Department of Epidemiology, Boston University School of Public Health, Boston, MA, USA
| | - Nathan A Bihlmeyer
- Predoctoral Training Program in Human Genetics, McKusick-Nathans Institute of Genetic Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Joshua C Bis
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Heather L Bloom
- Division of Cardiology, Emory University and Atlanta VA Medical Center, Atlanta, GA, USA
| | - Eric Boerwinkle
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX, USA
| | - Erwin B Bottinger
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Jennifer A Brody
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA, USA
| | | | - Archie Campbell
- Generation Scotland, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Thomas P Cappola
- Penn Cardiovascular Institute and Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - John Carlquist
- Intermountain Heart Institute, Intermountain Medical Center, Murray, UT, USA
- Division of Cardiovascular Medicine, University of Utah, Salt Lake City, UT, USA
| | - Daniel I Chasman
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Divisions of Preventive Medicine and Genetics, Brigham and Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Lin Y Chen
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Yii-Der Ida Chen
- Institute for Translational Genomics and Population Sciences, Department of Pediatrics, LABioMed at Harbor-UCLA Medical Center, Torrance, CA, USA
| | | | - Seung Hoan Choi
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Ingrid E Christophersen
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
- Department of Medical Research, Bærum Hospital, Vestre Viken Hospital Trust, Drammen, Norway
| | - Mina K Chung
- Departments of Cardiovascular Medicine, Cellular and Molecular Medicine, Molecular Cardiology, and Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA
| | - John W Cole
- Baltimore Veterans Affairs Medical Center, Department of Neurology, Baltimore, MD, USA
- University of Maryland School of Medicine, Department of Neurology, Baltimore, MD, USA
| | - David Conen
- University Hospital Basel, Basel, Switzerland
- Cardiovascular Research Institute Basel, Basel, Switzerland
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - James Cook
- Department of Biostatistics, University of Liverpool, Liverpool, UK
| | - Harry J Crijns
- Maastricht University Medical Center+ and Cardiovascular Research Institute Maastricht, Department of Cardiology, Maastricht, The Netherlands
| | - Michael J Cutler
- Intermountain Heart Institute, Intermountain Medical Center, Murray, UT, USA
| | - Scott M Damrauer
- Department of Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Surgery, Corporal Michael Crescenz VA Medical Center, Philadelphia, PA, USA
| | - Brian R Daniels
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | | | - Graciela Delgado
- Vth Department of Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Joshua C Denny
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Martin Dichgans
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
| | - Marcus Dörr
- Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Greifswald, Greifswald, Germany
| | - Elton A Dudink
- Maastricht University Medical Center+ and Cardiovascular Research Institute Maastricht, Department of Cardiology, Maastricht, The Netherlands
| | - Samuel C Dudley
- Cardiovascular Division and Lillehei Heart Institute, University of Minnesota, Minneapolis, MN, USA
| | - Nada Esa
- University of Massachusetts Medical School Worcester, Worcester, MA, USA
| | - Tonu Esko
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Estonian Genome Center, University of Tartu, Tartu, Estonia
| | - Markku Eskola
- Heart Center, Department of Cardiology, Tampere University Hospital, Finland and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Diane Fatkin
- Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia
- St Vincent's Hospital, Darlinghurst, New South Wales, Australia
- Faculty of Medicine, University of New South Wales, Kensington, New South Wales, Australia
| | - Stephan B Felix
- Department of Internal Medicine B, University Medicine Greifswald, Greifswald, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Greifswald, Greifswald, Germany
| | - Ian Ford
- Robertson Center for Biostatistics, University of Glasgow, Glasgow, UK
| | - Oscar H Franco
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Bastiaan Geelhoed
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Raji P Grewal
- Dept. of Neuroscience, Saint Francis Medical Center, Trenton, NJ, USA
- School of Health and Medical Sciences, Seton Hall University, South Orange, NJ, USA
| | - Vilmundur Gudnason
- Icelandic Heart Association, Kopavogur, Iceland
- Faculty of Medicine, University of Iceland, Reykavik, Iceland
| | - Xiuqing Guo
- Institute for Translational Genomics and Population Sciences, Department of Pediatrics, LABioMed at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Namrata Gupta
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Stefan Gustafsson
- Department of Medical Sciences, Molecular Epidemiology and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Rebecca Gutmann
- Division of Cardiovascular Medicine and Abboud Cardiovascular Research Center, University of Iowa, Iowa City, IA, USA
| | - Anders Hamsten
- Cardiovascular Genetics and Genomics Group, Atherosclerosis Research Unit, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Tamara B Harris
- Laboratory of Epidemiology, Demography, and Biometry, National Institute on Aging, Bethesda, MD, USA
| | - Caroline Hayward
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Susan R Heckbert
- Cardiovascular Health Research Unit and Department of Epidemiology, University of Washington, Seattle, WA, USA
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA
| | - Jussi Hernesniemi
- Heart Center, Department of Cardiology, Tampere University Hospital, Finland and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
- Department of Clinical Chemistry, Fimlab Laboratories and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Lynne J Hocking
- Institute of Medical Sciences, University of Aberdeen, Aberdeen, UK
| | - Albert Hofman
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Andrea R V R Horimoto
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - Jie Huang
- Boston VA Research Institute, Inc., Boston, MA, USA
| | - Paul L Huang
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
| | - Jennifer Huffman
- MRC Human Genetics Unit, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Erik Ingelsson
- Department of Medical Sciences, Molecular Epidemiology and Science for Life Laboratory, Uppsala University, Uppsala, Sweden
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Kaoru Ito
- Laboratory for Cardiovascular Diseases, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Jordi Jimenez-Conde
- Department of Neurology, Neurovascular Research Group IMIM-Hospital del Mar (Institut Hospital del Mar d'Investigacions Médiques), Barcelona, Spain
- Universitat Autònoma de Barcelona, Medicine Department, Barcelona, Spain
| | - Renee Johnson
- Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales, Australia
| | - J Wouter Jukema
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
- Durrer Center for Cardiogenetic Research, Amsterdam, The Netherlands
- Interuniversity Cardiology Institute of the Netherlands, Utrecht, The Netherlands
| | - Stefan Kääb
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Munich Heart Alliance, Munich, Germany
| | - Mika Kähönen
- Department of Clinical Physiology, Tampere University Hospital, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Yoichiro Kamatani
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - John P Kane
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, USA
| | - Adnan Kastrati
- DZHK (German Centre for Cardiovascular Research), partner site: Munich Heart Alliance, Munich, Germany
- Deutsches Herzzentrum München, Klinik für Herz- und Kreislauferkrankungen, Technische Universität München, Munich, Germany
| | - Sekar Kathiresan
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | | | - Maryam Kavousi
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Thorsten Kessler
- Deutsches Herzzentrum München, Klinik für Herz- und Kreislauferkrankungen, Technische Universität München, Munich, Germany
| | - Bas L Kietselaer
- Maastricht University Medical Center+ and Cardiovascular Research Institute Maastricht, Department of Cardiology, Maastricht, The Netherlands
| | - Paulus Kirchhof
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham, UK
- Sandwell and West Birmingham Hospitals NHS Trust and University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- AFNET, Muenster, Germany
| | - Marcus E Kleber
- Vth Department of Medicine, Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
| | - Stacey Knight
- Intermountain Heart Institute, Intermountain Medical Center, Murray, UT, USA
- Department of Medicine, University of Utah, Salt Lake City, UT, USA
| | - Jose E Krieger
- Laboratory of Genetics and Molecular Cardiology, Heart Institute, University of São Paulo, São Paulo, Brazil
| | - Michiaki Kubo
- RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Lenore J Launer
- Laboratory of Epidemiology, Demography, and Biometry, National Institute on Aging, Bethesda, MD, USA
| | - Jari Laurikka
- Department of Cardio-Thoracic Surgery, Heart Center, Tampere University Hospital, and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Terho Lehtimäki
- Department of Clinical Chemistry, Fimlab Laboratories and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | | | - Rozenn N Lemaitre
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Man Li
- Department of Epidemiology, Johns Hopkins University, Baltimore, MD, USA
- Division of Nephrology & Hypertension, Internal Medicine, School of Medicine, University of Utah, Salt Lake City, UT, USA
| | | | - Henry J Lin
- Institute for Translational Genomics and Population Sciences, Department of Pediatrics, LABioMed at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Honghuang Lin
- NHLBI and Boston University's Framingham Heart Study, Framingham, MA, USA
- Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Lars Lind
- Department of Medical Sciences, Cardiovascular Epidemiology, Uppsala University, Uppsala, Sweden
| | - Cecilia M Lindgren
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Marja-Liisa Lokki
- Transplantation Laboratory, Medicum, University of Helsinki, Helsinki, Finland
| | - Barry London
- Division of Cardiovascular Medicine and Abboud Cardiovascular Research Center, University of Iowa, Iowa City, IA, USA
| | - Ruth J F Loos
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Genetics of Obesity and Related Metabolic Traits Program, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Siew-Kee Low
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Yingchang Lu
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Genetics of Obesity and Related Metabolic Traits Program, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Leo-Pekka Lyytikäinen
- Department of Clinical Chemistry, Fimlab Laboratories and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Peter W Macfarlane
- Institute of Health and Wellbeing, College of Medical, Veterinary and Life Sciences, University of Glasgow, Glasgow, UK
| | - Patrik K Magnusson
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Anubha Mahajan
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Rainer Malik
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | | | - Gregory M Marcus
- Division of Cardiology, University of California, San Francisco, San Francisco, California, USA
| | - Lauren Margolin
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Kenneth B Margulies
- Penn Cardiovascular Institute and Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Winfried März
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
- Synlab Academy, Synlab Services GmbH, Mannheim, Germany
| | - David D McManus
- University of Massachusetts Medical School Worcester, Worcester, MA, USA
| | - Olle Melander
- Department of Internal Medicine, Clinical Sciences, Lund University, Malmo, Sweden
| | - Sanghamitra Mohanty
- Texas Cardiac Arrhythmia Institute, St David's Medical Center, Austin, TX, USA
- Dell Medical School, Austin, TX, USA
| | - Jay A Montgomery
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Michael P Morley
- Penn Cardiovascular Institute and Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Andrew P Morris
- Department of Biostatistics, University of Liverpool, Liverpool, UK
| | - Martina Müller-Nurasyid
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Munich Heart Alliance, Munich, Germany
- Institute of Genetic Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Andrea Natale
- Texas Cardiac Arrhythmia Institute, St David's Medical Center, Austin, TX, USA
- Dell Medical School, Austin, TX, USA
| | | | - Benjamin Neumann
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University, Munich, Germany
| | - Christopher Newton-Cheh
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Maartje N Niemeijer
- Department of Epidemiology, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Kjell Nikus
- Heart Center, Department of Cardiology, Tampere University Hospital, Finland and Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Peter Nilsson
- Department of Clinical Sciences, Lund University and Skåne University Hospital, Malmo, Sweden
| | - Raymond Noordam
- Section of Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | | | - Morten S Olesen
- Laboratory for Molecular Cardiology, The Heart Centre, Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- The Danish National Research Foundation Centre for Cardiac Arrhythmia, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | | | - Sandosh Padmanabhan
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, Glasgow, UK
| | - Hui-Nam Pak
- Yonsei University Health System, Seoul, Korea
| | - Guillaume Paré
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Nancy L Pedersen
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Joanna Pera
- Department of Neurology, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Alexandre Pereira
- Laboratory of Genetics and Molecular Biology, Heart Institute, University of São Paulo, São Paulo, Brazil
- Department of Genetics, Harvard Medical School, Boston, MA, USA
| | - David Porteous
- Generation Scotland, Centre for Genomic and Experimental Medicine, Institute of Genetics and Molecular Medicine, University of Edinburgh, Edinburgh, UK
| | - Bruce M Psaty
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA
- Cardiovascular Health Research Unit, Departments of Medicine, Epidemiology, and Health Services, University of Washington, Seattle, WA, USA
| | - Sara L Pulit
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Genetics, Center for Molecular Medicine, University Medical Centre Utrecht, Utrecht University, Utrecht, The Netherlands
- Li Ka Shing Center for Health Information and Discovery, Big Data Institute, Oxford University, Oxford, UK
| | - Clive R Pullinger
- Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, USA
| | - Daniel J Rader
- Division of Cardiovascular Medicine, Department of Medicine, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Lena Refsgaard
- Laboratory for Molecular Cardiology, The Heart Centre, Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- The Danish National Research Foundation Centre for Cardiac Arrhythmia, Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Marta Ribasés
- Psychiatric Genetics Unit, Group of Psychiatry, Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Psychiatry, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Biomedical Network Research Centre on Mental Health (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
| | - Paul M Ridker
- Divisions of Preventive and Cardiovascular Medicine, Brigham and Women's Hospital & Harvard Medical School, Boston, MA, USA
| | - Michiel Rienstra
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Lorenz Risch
- University Institute of Clinical Chemistry, University of Bern, Bern, Switzerland
- Labormedizinisches Zentrum Dr. Risch, Schaan, Liechtenstein
| | - Dan M Roden
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Jonathan Rosand
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
| | - Michael A Rosenberg
- Center for Genomic Medicine, Massachusetts General Hospital, Boston, MA, USA
- University of Colorado School of Medicine, Aurora, CO, USA
| | - Natalia Rost
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- J. Philip Kistler Stroke Research Center, Massachusetts General Hospital, Boston, MA, USA
| | - Jerome I Rotter
- Institute for Translational Genomics and Population Sciences, Departments of Pediatrics and Medicine, LABioMed at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Samir Saba
- Division of Cardiology, University of Pittsburgh, Pittsburgh, PA, USA
| | - Roopinder K Sandhu
- Division of Cardiology, University of Alberta, Edmonton, Alberta, Canada
| | - Renate B Schnabel
- Department of General and Interventional Cardiology, University Heart Centre Hamburg, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Katharina Schramm
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University, Munich, Germany
- Institute of Genetic Epidemiology, Helmholtz Zentrum München-German Research Center for Environmental Health, Neuherberg, Germany
| | - Heribert Schunkert
- DZHK (German Centre for Cardiovascular Research), partner site: Munich Heart Alliance, Munich, Germany
- Deutsches Herzzentrum München, Klinik für Herz- und Kreislauferkrankungen, Technische Universität München, Munich, Germany
| | - Claudia Schurman
- The Charles Bronfman Institute for Personalized Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Genetics of Obesity and Related Metabolic Traits Program, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Stuart A Scott
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ilkka Seppälä
- Department of Clinical Chemistry, Fimlab Laboratories and Finnish Cardiovascular Research Center-Tampere, Faculty of Medicine and Life Sciences, University of Tampere, Tampere, Finland
| | - Christian Shaffer
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Svati Shah
- Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Alaa A Shalaby
- Division of Cardiology, University of Pittsburgh, Pittsburgh, PA, USA
- Cardiology Division, Pittsburgh VA Healthcare System, Pittsburgh, Pennsylvania, USA
| | - Jaemin Shim
- Korea University Anam Hospital, Seoul, Korea
| | - M Benjamin Shoemaker
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Joylene E Siland
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Juha Sinisalo
- Heart and Lung Center HUS, Helsinki University Central Hospital, Helsinki, Finland
| | - Moritz F Sinner
- Department of Medicine I, University Hospital Munich, Ludwig-Maximilians-University, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Munich Heart Alliance, Munich, Germany
| | - Agnieszka Slowik
- Department of Neurology, Faculty of Medicine, Jagiellonian University Medical College, Krakow, Poland
| | - Albert V Smith
- Icelandic Heart Association, Kopavogur, Iceland
- Faculty of Medicine, University of Iceland, Reykavik, Iceland
| | - Blair H Smith
- Division of Population Health Sciences, University of Dundee, Dundee, UK
| | - J Gustav Smith
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Department of Cardiology, Clinical Sciences, Lund University and Skåne University Hospital, Lund, Sweden
| | - Jonathan D Smith
- Departments of Cardiovascular Medicine, Cellular and Molecular Medicine, Molecular Cardiology, and Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA
| | - Nicholas L Smith
- Cardiovascular Health Research Unit and Department of Epidemiology, University of Washington, Seattle, WA, USA
- Kaiser Permanente Washington Health Research Institute, Seattle, WA, USA
| | - Elsayed Z Soliman
- Epidemiological Cardiology Research Center (EPICARE), Wake Forest School of Medicine, Winston Salem, NC, USA
| | - Nona Sotoodehnia
- Cardiovascular Health Research Unit, Departments of Medicine and Epidemiology, University of Washington, Seattle, WA, USA
| | - Bruno H Stricker
- Department of Epidemiology and Internal Medicine, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
- Inspectorate of Health Care, Utrecht, The Netherlands
| | - Albert Sun
- Division of Cardiology, Department of Medicine, Duke University School of Medicine, Durham, North Carolina, USA
| | - Han Sun
- Departments of Cardiovascular Medicine, Cellular and Molecular Medicine, Molecular Cardiology, and Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA
| | - Jesper H Svendsen
- Laboratory for Molecular Cardiology, The Heart Centre, Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Toshihiro Tanaka
- Department of Human Genetics and Disease Diversity, Tokyo Medical and Dental University Graduate School of Medical and Dental Sciences, Tokyo, Japan
| | | | - Kent D Taylor
- Institute for Translational Genomics and Population Sciences, Department of Pediatrics, LABioMed at Harbor-UCLA Medical Center, Torrance, CA, USA
| | | | - Alexander Teumer
- DZHK (German Centre for Cardiovascular Research), partner site: Greifswald, Greifswald, Germany
- Institute for Community Medicine, University Medicine Greifswald, Greifswald, Germany
| | - Sébastien Thériault
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Stella Trompet
- Department of Cardiology, Leiden University Medical Center, Leiden, The Netherlands
- Section of Gerontology and Geriatrics, Department of Internal Medicine, Leiden University Medical Center, Leiden, The Netherlands
| | - Nathan R Tucker
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
| | - Arnljot Tveit
- Department of Medical Research, Bærum Hospital, Vestre Viken Hospital Trust, Drammen, Norway
- Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Andre G Uitterlinden
- Department of Epidemiology and Internal Medicine, Erasmus University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Pim Van Der Harst
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Isabelle C Van Gelder
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - David R Van Wagoner
- Departments of Cardiovascular Medicine, Cellular and Molecular Medicine, Molecular Cardiology, and Quantitative Health Sciences, Cleveland Clinic, Cleveland, OH, USA
| | - Niek Verweij
- Department of Cardiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | | | - Uwe Völker
- DZHK (German Centre for Cardiovascular Research), partner site: Greifswald, Greifswald, Germany
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine and Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Biqi Wang
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Peter E Weeke
- Laboratory for Molecular Cardiology, The Heart Centre, Department of Cardiology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Bob Weijs
- Maastricht University Medical Center+ and Cardiovascular Research Institute Maastricht, Department of Cardiology, Maastricht, The Netherlands
| | - Raul Weiss
- Division of Cardiovascular Medicine, The Ohio State University, Columbus, OH, USA
| | - Stefan Weiss
- DZHK (German Centre for Cardiovascular Research), partner site: Greifswald, Greifswald, Germany
- Interfaculty Institute for Genetics and Functional Genomics, University Medicine and Ernst-Moritz-Arndt-University Greifswald, Greifswald, Germany
| | - Quinn S Wells
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Kerri L Wiggins
- Cardiovascular Health Research Unit, Department of Medicine, University of Washington, Seattle, WA, USA
| | - Jorge A Wong
- Division of Cardiology, Hamilton Health Sciences, McMaster University, Hamilton, Ontario, Canada
| | - Daniel Woo
- University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Bradford B Worrall
- Departments of Neurology and Public Health Science, University of Virginia Health System, Charlottesville, VA, USA
| | | | - Jie Yao
- Institute for Translational Genomics and Population Sciences, Department of Pediatrics, LABioMed at Harbor-UCLA Medical Center, Torrance, CA, USA
| | - Zachary T Yoneda
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Tanja Zeller
- Department of General and Interventional Cardiology, University Heart Centre Hamburg, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site: Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Lingyao Zeng
- Deutsches Herzzentrum München, Klinik für Herz- und Kreislauferkrankungen, Technische Universität München, Munich, Germany
| | - Steven A Lubitz
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA
- Cardiac Arrhythmia Service, Massachusetts General Hospital, Boston, MA, USA
| | - Kathryn L Lunetta
- NHLBI and Boston University's Framingham Heart Study, Framingham, MA, USA
- Department of Biostatistics, Boston University School of Public Health, Boston, MA, USA
| | - Patrick T Ellinor
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, MA, USA.
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA, USA.
- Cardiac Arrhythmia Service, Massachusetts General Hospital, Boston, MA, USA.
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Linti C, Doser M, Planck H, Oberhoffner S, Mueller E, Renardy M, Biesinger J, Neumann B, Stang K, Greiner TO, Schlensak C, Krajewski S, Wendel HP. Development, preclinical evaluation and validation of a novel quick vascular closure device for transluminal, cardiac and radiological arterial catheterization. J Mater Sci Mater Med 2018; 29:83. [PMID: 29892952 DOI: 10.1007/s10856-018-6092-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 05/26/2018] [Indexed: 06/08/2023]
Abstract
Following percutaneous coronary intervention, vascular closure devices (VCDs) are increasingly used to reduce time to ambulation, enhance patient comfort, and reduce potential complications compared with traditional manual compression. Newer techniques include complicated, more or less automated suture devices, local application of pads or the use of metal clips and staples. These techniques often have the disadvantage of being time consuming, expensive or not efficient enough. The VCD failure rate in association with vascular complications of 2.0-9.5%, depending on the type of VCD, is still not acceptable. Therefore, the aim of this study is to develop a self-expanding quick vascular closure device (QVCD) made from a bioabsorbable elastic polymer that can be easily applied through the placed introducer sheath. Bioabsorbable block-co-polymers were synthesized and the chemical and mechanical degradation were determined by in vitro tests. The best fitting polymer was selected for further investigation and for microinjection moulding. After comprehensive haemocompatibility analyses in vitro, QVCDs were implanted in arterial vessels following arteriotomy for different time points in sheep to investigate the healing process. The in vivo tests proved that the new QVCD can be safely placed in the arteriotomy hole through the existing sheath instantly sealing the vessel. The degradation time of 14 days found in vitro was sufficient for vessel healing. After 4 weeks, the remaining QVCD material was covered by neointima. Overall, our experiments showed the safety and feasibility of applying this novel QVCD through an existing arterial sheath and hence encourage future work with larger calibers.
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Affiliation(s)
- C Linti
- German Institutes of Textile and Fiber Research (DITF), Denkendorf, Germany
| | - M Doser
- German Institutes of Textile and Fiber Research (DITF), Denkendorf, Germany
| | - H Planck
- German Institutes of Textile and Fiber Research (DITF), Denkendorf, Germany
| | - S Oberhoffner
- German Institutes of Textile and Fiber Research (DITF), Denkendorf, Germany
| | - E Mueller
- ITV Denkendorf Produktservice GmbH, Denkendorf, Germany
| | - M Renardy
- ITV Denkendorf Produktservice GmbH, Denkendorf, Germany
| | - J Biesinger
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - B Neumann
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - K Stang
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - T O Greiner
- Department of General, Visceral and Transplant Surgery, University Hospital of Tuebingen, Tuebingen, Germany
| | - C Schlensak
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - S Krajewski
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - H P Wendel
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany.
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Moraleja I, Mena M, Lázaro A, Neumann B, Tejedor A, Jakubowski N, Gómez-Gómez M, Esteban-Fernández D. An approach for quantification of platinum distribution in tissues by LA-ICP-MS imaging using isotope dilution analysis. Talanta 2018; 178:166-171. [DOI: 10.1016/j.talanta.2017.09.031] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 09/06/2017] [Accepted: 09/10/2017] [Indexed: 11/27/2022]
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10
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Affiliation(s)
- B. Neumann
- Department of Clinical Neuroscience; WT MRC Stem Cell Institute Cambridge; Cambridge UK
| | - R. Baror
- Department of Clinical Neuroscience; WT MRC Stem Cell Institute Cambridge; Cambridge UK
| | - P. van Wijngaarden
- Department of Ophthalmology; Centre for Eye Research Australia; Melbourne VIC Australia
| | - R.J. Franklin
- Department of Clinical Neuroscience; WT MRC Stem Cell Institute Cambridge; Cambridge UK
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11
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Vink A, Neumann B, Lieve K, Hofman N, El Kadi S, Schoenmaker M, Slaghekke H, Clur S, Blom N, Kaab S, Sinner M, Postema P, Wilde A. P6380How to determine the QT interval: comprehensive analysis of a large cohort of Long QT syndrome patients and controls. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p6380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Wakula P, Neumann B, Kienemund J, Thon-Gutschi E, Stojakovic T, Manninger M, Scherr D, Scharnagl H, Kapl M, Pieske B, Heinzel FR. CHA2DS2-VASc score and blood biomarkers to identify patients with atrial high-rate episodes and paroxysmal atrial fibrillation. Europace 2017; 19:544-551. [PMID: 28431065 DOI: 10.1093/europace/euw101] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 12/11/2015] [Accepted: 02/13/2016] [Indexed: 10/13/2023] Open
Abstract
AIMS Paroxysmal atrial fibrillation (PAF) is often asymptomatic but nonetheless harmful. We evaluated the performance of disease-related blood biomarkers and CHA2DS2-VASc score to discriminate for PAF in patients with continuous rhythm monitoring. METHODS AND RESULTS Clinical data and blood samples were obtained from patients with dual-chamber pacemakers selected according to the absence (no_AHRE) or presence of Atrial High-Rate Episodes (AHRE) >6 min in recent device history (case-control approach). We included 93 patients (n = 49 AHRE, n = 44 no_AHRE). In a subgroup with high AHRE burden and confirmed PAF 15 biomarkers were evaluated (n = 19 AHRE-AF vs. n = 20 no_AHRE). Significantly regulated biomarkers were then tested in all patients to distinguish no_AHRE from AHRE (receiver operating characteristics analysis). Hsp27, TGFβ1, cystatin C, matrix metalloproteinases MMP-2,-3,-9, albumin, and serum uric acid were not altered in the subgroup. Tissue inhibitors of metalloproteinases (TIMP) -1,-2,-4; NT-proANP, NT-proBNP, IL-6 and serum amyloid protein A were significantly different in AHRE vs. no_AHRE (subgroup and whole cohort), with best discriminatory performance for TIMP-4. Biomarkers performed better than CHADS2-VASc for AHRE discrimination. Intracardial electrograms and medical history from seven AHRE patients suggested atrial tachycardia and not AF (AHRE-AT). Four of the most relevant regulated biomarkers (TIMP-4, TIMP-2, SAA, NT-proBNP) behaved similarly in AHRE-AT and AHRE-AF. NT-proBNP >150 pg/mL indicated an odds ratio of 12.9 for AHRE. Combining two biomarkers significantly improved discrimination of AHRE. CONCLUSION TIMP-4, NT-proANP, NT-proBNP were strongest associated with PAF and AHRE. The discriminatory performance of CHADS2-VASc for PAF was increased by addition of selected biomarkers.
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Affiliation(s)
- Paulina Wakula
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, Berlin 13353, Germany
- DZHK (German Center for Cardiovascular Research), partner site, Berlin, Germany
| | - Benjamin Neumann
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Jens Kienemund
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Eva Thon-Gutschi
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Tatjana Stojakovic
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Martin Manninger
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Daniel Scherr
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Hubert Scharnagl
- Clinical Institute of Medical and Chemical Laboratory Diagnostics, Medical University of Graz, Graz, Austria
| | - Martin Kapl
- Division of Cardiology, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Burkert Pieske
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, Berlin 13353, Germany
- DZHK (German Center for Cardiovascular Research), partner site, Berlin, Germany
| | - Frank R Heinzel
- Department of Cardiology, Charité-Universitätsmedizin Berlin, Campus Virchow-Klinikum, Augustenburger Platz 1, Berlin 13353, Germany
- DZHK (German Center for Cardiovascular Research), partner site, Berlin, Germany
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Bodenstein, Pauli, Weygand C, Diepschlag, Thiensen, Ebert L, Schaefer C, Helferich B, Liesegang KE, Neumann B, Schiller L, Kordes E. Bücherschau. Z PHYS CHEM 2017. [DOI: 10.1515/zpch-1932-16228] [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: 11/15/2022]
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14
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Eckle VS, Neumann B, Greiner TO, Wendel HP, Grasshoff C. Intrajugular balloon catheter reduces air embolism in vitro and in vivo. Br J Anaesth 2015; 114:973-8. [PMID: 25835025 PMCID: PMC4436929 DOI: 10.1093/bja/aev040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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] [Accepted: 12/04/2014] [Indexed: 01/05/2023] Open
Abstract
Background Neurosurgical procedures requiring a sitting position may put the patient at risk of a potentially life-threatening air embolism. Transient manual jugular venous compression limits further air entry in this situation. This study presents an alternative technique aimed at reducing the risk of air embolism. Methods In an in vitro model, an intrajugular balloon catheter was inserted to demonstrate that this device prevents air embolism. In an in vivo study, this device was bilaterally placed into jugular vessels in pigs. Using an ultrasound technique, blood flow was monitored and jugular venous pressure was recorded before and during cuff inflation. Air was applied proximally to the inflated cuffs to test the hypothesis that this novel device blocks air passage. Results In vitro, the intrajugular balloon catheter reliably prevented further air entry (n=10). Additionally, accumulated air could be aspirated from an orifice of the catheter (n=10). In vivo, inflation of the catheter balloon completely obstructed venous blood flow (n=8). Bilateral inflation of the cuff significantly increased the proximal jugular venous pressure from 9.8 (2.4) mm Hg to 14.5 (2.5) mm Hg (n=8, P<0.05). Under conditions mimicking an air embolism, air passage across the inflated cuffs was prevented and 78 (20%) (n=6) of the air dose could be aspirated by the proximal orifice of the catheter. Conclusions These findings may serve as a starting point for the development of intrajugular balloon catheters designed to reduce the risk of air embolism in patients undergoing neurosurgery in a sitting position.
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Affiliation(s)
- V S Eckle
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Tübingen, Germany
| | - B Neumann
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tübingen, Germany
| | - T O Greiner
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tübingen, Germany
| | - H P Wendel
- Department of Thoracic, Cardiac and Vascular Surgery, Clinical Research Laboratory, University Hospital Tübingen, Germany
| | - C Grasshoff
- Department of Anaesthesiology and Intensive Care Medicine, University Hospital Tübingen, Germany
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15
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Krajewski S, Nathan T, Walker T, Neumann B, Hoffmann S, Abel M, Koggel A, Schlensak C, Wendel HP. Identification of Abdominal Swabs Exhibiting Procoagulant Potency Using a Novel Simple Clotting Test. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Krajewski S, Neumann B, Kurz J, Perle N, Avci-Adali M, Cattaneo G, Wendel HP. Preclinical evaluation of the thrombogenicity and endothelialization of bare metal and surface-coated neurovascular stents. AJNR Am J Neuroradiol 2014; 36:133-9. [PMID: 25258364 DOI: 10.3174/ajnr.a4109] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Stent-assisted coiling is routinely used for the endovascular treatment of complex or wide-neck intracranial aneurysms. However, in-stent thrombosis, thromboembolic events, and ischemic complications remain a major concern associated with stent implants. Therefore, a novel low-profile neurovascular stent with a bare metal surface was investigated with regard to thrombogenicity and endothelialization and compared with the same stent coated with albumin or heparin. MATERIALS AND METHODS The bare metal and heparin- or albumin-coated stents were loaded in heparin-coated tubing, which was then filled with heparinized human blood (n = 5) and circulated at 150 mL/min and 37°C for 60 minutes. Before and after circulation, measurement of various inflammation and coagulation markers and scanning electron microscopy were performed. Endothelialization of the stents was investigated in an in vitro model including human umbilical vascular endothelial cells. RESULTS Our results showed that platelet loss and platelet activation and activation of the coagulation cascade, which are induced by the bare metal stents, were significantly reduced by heparin or albumin coating. Adverse effects on erythrocytes, leukocytes, and the complement cascade were not induced by the bare metal or coated stents. Moreover, the bare metal and albumin-coated stents showed good endothelialization properties. CONCLUSIONS Albumin and heparin coatings clearly improve the thrombogenicity of the stents and thus may represent fundamental progress in the treatment of intracranial aneurysms. Moreover, preclinical evaluation of neurovascular stents under physiologic conditions supports and accelerates the development of more biocompatible neurovascular stents.
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Affiliation(s)
- S Krajewski
- From the Department of Thoracic, Cardiac and Vascular Surgery (S.K., B.N., J.K., N.P., M.A.-A., H.P.W.), Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - B Neumann
- From the Department of Thoracic, Cardiac and Vascular Surgery (S.K., B.N., J.K., N.P., M.A.-A., H.P.W.), Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - J Kurz
- From the Department of Thoracic, Cardiac and Vascular Surgery (S.K., B.N., J.K., N.P., M.A.-A., H.P.W.), Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - N Perle
- From the Department of Thoracic, Cardiac and Vascular Surgery (S.K., B.N., J.K., N.P., M.A.-A., H.P.W.), Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - M Avci-Adali
- From the Department of Thoracic, Cardiac and Vascular Surgery (S.K., B.N., J.K., N.P., M.A.-A., H.P.W.), Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
| | - G Cattaneo
- Acandis GmbH & Co KG (G.C.), Pforzheim, Germany
| | - H P Wendel
- From the Department of Thoracic, Cardiac and Vascular Surgery (S.K., B.N., J.K., N.P., M.A.-A., H.P.W.), Clinical Research Laboratory, University Hospital Tuebingen, Tuebingen, Germany
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Langecker TG, Neumann B, Hausberg C, Parzefall J. Evolution of the optical releasers for aggressive behavior in cave-dwelling Astyanax fasciatus (Teleostei, Characidae). Behav Processes 2014; 34:161-7. [PMID: 24897516 DOI: 10.1016/0376-6357(94)00063-m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/1994] [Indexed: 11/25/2022]
Abstract
Epigean and blind cave-dwelling populations of the characid Astyanax fasciatus differ in their agonistic behavior. Epigean specimens are characterized by intense aggressive behavior and territoriality in the laboratory, whereas the blind cave fishes are rarely aggressive and have totally lost the territorial behavior. These behavioral changes are genetically based. In the present study, a comparative analysis of the optical releasers for aggressive behavior has been performed in both epigean and cave-dwelling populations. It was expected that the regression of aggressive behavior should be accompanied by the regression of the genetically fixed optical releasers for aggression in the cave specimens. For the analysis of cave fishes, well-eyed F1-hybrids of cave and epigean specimens (Pachon × Teapao) as well as phylogenetically young cave specimens (Micos) selected for large eyes, have been used. In epigean specimens, aggression is most intensely released by a combination of the signals 'natural shape' and 'locomotion'. The cave populations exhibit a partial regression of the releaser 'natural shape'. 'Locomotion', however, has become a more effective releaser for aggression in cave fishes than it has in their epigean relatives. The results are discussed with respect to their evolutionary significance.
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Affiliation(s)
- T G Langecker
- Zoologisches Institut und Museum, Universität Hamburg, Martin-Luther-King Platz 3, D-20146 Hamburg, Germany
| | - B Neumann
- Institut für Verhaltensbiologie und Zoologie, Humboldt Universität Berlin, Invalidenstr. 43, D-10115 Berlin, Germany
| | - C Hausberg
- Zoologisches Institut und Museum, Universität Hamburg, Martin-Luther-King Platz 3, D-20146 Hamburg, Germany
| | - J Parzefall
- Zoologisches Institut und Museum, Universität Hamburg, Martin-Luther-King Platz 3, D-20146 Hamburg, Germany
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18
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Buhl S, Neumann B, Schäfer SC, Severing AL. Automatic cell segmentation in strongly agglomerated cell networks for different cell types. Int J Comput Biol Drug Des 2014; 7:259-77. [PMID: 24878733 DOI: 10.1504/ijcbdd.2014.061641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper presents a method of separating cells that are connected to each other forming clusters. The difference to many other publications covering similar topics is that the cell types we are dealing with form clusters of highly varying morphology. An advantage of our method is that it can be universally used for different cell types. The segmentation method is based on a growth simulation starting from the nuclei areas. To start the evaluation, the cells need to be made visible with a histological stain, in our case with the May-Grünwald solution. After the staining process has been completed, the nuclei areas can be distinguished from the other cell areas by a histogram backprojection algorithm. The presented method can, in addition to histological stained cells, also be applied to fluorescent-stained cells.
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Affiliation(s)
- S Buhl
- Institute for Computer Science, Vision and Computational Intelligence, South Westphalia University of Applied Sciences, Frauenstuhlweg 31, 58644 Iserlohn, Germany
| | - B Neumann
- Institute for Computer Science, Vision and Computational Intelligence, South Westphalia University of Applied Sciences, Frauenstuhlweg 31, 58644 Iserlohn, Germany
| | - S C Schäfer
- Institute for Computer Science, Vision and Computational Intelligence, South Westphalia University of Applied Sciences, Frauenstuhlweg 31, 58644 Iserlohn, Germany
| | - A L Severing
- Institute for Computer Science, Vision and Computational Intelligence, South Westphalia University of Applied Sciences, Frauenstuhlweg 31, 58644 Iserlohn, Germany
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Böttcher T, Steinhauer S, Neumann B, Stammler HG, Röschenthaler GV, Hoge B. Pentacoordinate silicon(IV): cationic, anionic and neutral complexes derived from the reaction of NHC→SiCl4 with highly Lewis acidic (C2F5)2SiH2. Chem Commun (Camb) 2014; 50:6204-6. [PMID: 24764020 DOI: 10.1039/c4cc02583k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Addition of NHC→SiCl4 to the highly Lewis acidic bis(pentafluoroethyl)silane ((C2F5)2SiH2) afforded the salt [(NHC)2SiCl2H][(C2F5)2SiCl3] with pentacoordinate silicon in the cation and the anion. The anion represents the first example of a chlorosilicate structurally characterized in the solid state. In this reaction, the long sought pentacoordinate NHC-adduct of silicochloroform was identified as an intermediate and its crystal structure is presented.
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Affiliation(s)
- T Böttcher
- Universität Bielefeld, Centrum für Molekulare Materialien, Anorganische Chemie II, Universitätsstraße 25, 33615 Bielefeld, Germany.
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Brasch J, Mörig A, Neumann B, Proksch E. Expression of antimicrobial peptides and toll-like receptors is increased in tinea and pityriasis versicolor. Mycoses 2013; 57:147-52. [PMID: 23952012 DOI: 10.1111/myc.12118] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [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: 06/14/2013] [Accepted: 07/18/2013] [Indexed: 12/22/2022]
Abstract
In superficial tinea and pityriasis versicolor, the causative fungi are for the most part confined to the stratum corneum which is barely reached by leukocytes. Therefore, a role of non-cellular components in the epidermal antifungal defence was suggested. To investigate the presence of such factors in these infections, the expression of human beta defensins 2 and 3 (hBD-2, hBD-3), RNase 7, psoriasin, toll-like receptors 2, 4 and 9 (TLR2, TLR4 and TLR9) and dectin 2 was analysed by use of immunostainings in skin biopsies. We found that hBD2, hBD3, psoriasin, RNase7, TLR2 and TLR4 were significantly more often expressed in distinct layers of lesional epidermis as compared with uninfected epidermis. In both infections but not in normal skin, hBD2 and hBD3 were commonly expressed within the stratum corneum and in the stratum granulosum. Similarly, psoriasin was seen more often in the upper skin layers of both infections as compared with normal skin. No significant differences between normal and infected skin were found for the expression of TLR9 and dectin 2. Our findings clearly show the expression of specific antimicrobial proteins and defence-related ligands in superficial tinea as well as in pityriasis versicolor, suggesting that these factors contribute to fungal containment.
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Affiliation(s)
- J Brasch
- Department of Dermatology, University Hospitals of Schleswig-Holstein, Kiel, Germany
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Botelho H, Dahimène S, Uliyakina I, Neumann B, Tischer C, Pepperkok R, Amaral M. WS20.6 High throughput screening as a source for novel cystic fibrosis therapeutic targets. J Cyst Fibros 2013. [DOI: 10.1016/s1569-1993(13)60128-9] [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: 11/26/2022]
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Krüger T, Walker T, Nolte A, Secker S, Greiner TO, Neumann B, Wendel HP, Schlensak C. Veins under pressure: The relationship of arterial pressure to adhesion molecule expression and leukocyte adhesion in venous bypass grafts. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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Minnermann M, Neumann B, Zielasek V, Bäumer M. Alumina-promoted cobalt and iron xerogels as catalyst for the Fischer–Tropsch synthesis. Catal Sci Technol 2013. [DOI: 10.1039/c3cy00483j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Neumann B, Elkins TW, Dreher W, Hagelin-Weaver H, Nino JC, Bäumer M. Enhanced catalytic methane coupling using novel ceramic foams with bimodal porosity. Catal Sci Technol 2013. [DOI: 10.1039/c2cy20458d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Bergmann U, Ahrends R, Neumann B, Scheler C, Linscheid MW. Application of Metal-Coded Affinity Tags (MeCAT): Absolute Protein Quantification with Top-Down and Bottom-Up Workflows by Metal-Coded Tagging. Anal Chem 2012; 84:5268-75. [DOI: 10.1021/ac203460b] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- U. Bergmann
- Department of Chemistry, Humboldt-Universitaet zu Berlin, Brook-Taylor-Strasse
2, 12489 Berlin, Germany
- Proteome Factory AG, Magnusstrasse 11, 12489 Berlin, Germany
| | - R. Ahrends
- Department of Chemistry, Humboldt-Universitaet zu Berlin, Brook-Taylor-Strasse
2, 12489 Berlin, Germany
| | - B. Neumann
- Proteome Factory AG, Magnusstrasse 11, 12489 Berlin, Germany
| | - C. Scheler
- Proteome Factory AG, Magnusstrasse 11, 12489 Berlin, Germany
| | - M. W. Linscheid
- Department of Chemistry, Humboldt-Universitaet zu Berlin, Brook-Taylor-Strasse
2, 12489 Berlin, Germany
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Krajewski S, Kurz J, Neumann B, Greiner TO, Stolz A, Balkau B, Peter K, Unertl K, Wendel HP, Straub A. Short-acting P2Y12 blockade to reduce platelet dysfunction and coagulopathy during experimental extracorporeal circulation and hypothermia. Br J Anaesth 2012; 108:912-21. [PMID: 22369765 DOI: 10.1093/bja/aer518] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Extracorporeal circulation (ECC) and hypothermia are routinely used in cardiac surgery to maintain stable circulatory parameters and to increase the ischaemic tolerance of the patient. However, ECC and hypothermia cause platelet activation and dysfunction possibly followed by a devastating coagulopathy. Stimulation of the adenosinediphosphate (ADP) receptor P(2)Y(12) plays a pivotal role in platelet activation. This experimental study tested P(2)Y(12) receptor blockade as an approach to protect platelets during ECC. METHODS Human blood was treated with the short-acting P(2)Y(12) blocker cangrelor (1 µM, t(1/2)<5 min) or the P(2)Y(12) inhibitor 2-MeSAMP (100 µM) and circulated in an ex vivo ECC model at normothermia (37°C) and hypothermia (28°C). Before and after circulation, markers of platelet activation and of coagulation (thrombin-antithrombin complex generation) were analysed. During hypothermic ECC in pigs, the effect of reversible P(2)Y(12) blockade on platelet function was evaluated by cangrelor infusion (0.075 µg kg(-1) min(-1)). RESULTS During ex vivo hypothermic ECC, P(2)Y(12) blockade inhibited platelet granule release (P<0.01), platelet-granulocyte binding (P<0.05), and platelet loss (P<0.001), whereas no effects on platelet-ECC binding, platelet CD42bα expression, glycoprotein IIb/IIIa activation, or thrombin-antithrombin complex generation were observed. During hypothermic ECC in pigs, cangrelor inhibited platelet-fibrinogen binding (P<0.05) and ADP-induced platelet aggregation (P<0.001). Platelet function was rapidly restored after termination of cangrelor infusion. CONCLUSIONS P(2)Y(12) blockade by cangrelor prevents platelet activation during ECC and hypothermia. Owing to its short half-life, platelet inhibition can be well controlled, thus potentially reducing bleeding complications. This novel pharmacological strategy has the potential to reduce complications associated with ECC and hypothermia.
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Affiliation(s)
- S Krajewski
- Department of Anesthesiology and Intensive Care Medicine, University of Tübingen, Tübingen, Germany.
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Lescan M, Kobba J, Avci-Adali M, Neumann B, Perle N, Wilhelm N, Wiedmaier H, Wendel HP, Schlensak C. An in vitro rotation model composed of disposables for investigation of endothelialization of artificial vascular prostheses. Thorac Cardiovasc Surg 2012. [DOI: 10.1055/s-0031-1297843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Moudry P, Lukas C, Macurek L, Neumann B, Heriche JK, Pepperkok R, Ellenberg J, Hodny Z, Lukas J, Bartek J. Nucleoporin NUP153 guards genome integrity by promoting nuclear import of 53BP1. Cell Death Differ 2011; 19:798-807. [PMID: 22075984 DOI: 10.1038/cdd.2011.150] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
53BP1 is a mediator of DNA damage response (DDR) and a tumor suppressor whose accumulation on damaged chromatin promotes DNA repair and enhances DDR signaling. Using foci formation of 53BP1 as a readout in two human cell lines, we performed an siRNA-based functional high-content microscopy screen for modulators of cellular response to ionizing radiation (IR). Here, we provide the complete results of this screen as an information resource, and validate and functionally characterize one of the identified 'hits': a nuclear pore component NUP153 as a novel factor specifically required for 53BP1 nuclear import. Using a range of cell and molecular biology approaches including live-cell imaging, we show that knockdown of NUP153 prevents 53BP1, but not several other DDR factors, from entering the nuclei in the newly forming daughter cells. This translates into decreased IR-induced 53BP1 focus formation, delayed DNA repair and impaired cell survival after IR. In addition, NUP153 depletion exacerbates DNA damage caused by replication stress. Finally, we show that the C-terminal part of NUP153 is required for effective 53BP1 nuclear import, and that 53BP1 is imported to the nucleus through the NUP153-importin-β interplay. Our data define the structure-function relationships within this emerging 53BP1-NUP153/importin-β pathway and implicate this mechanism in the maintenance of genome integrity.
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Affiliation(s)
- P Moudry
- Department of Genome Integrity, Institute of Molecular Genetics, v.v.i., Academy of Sciences of the Czech Republic, Prague CZ-142 20, Czech Republic
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Nolte A, Secker S, Walker T, Greiner TO, Neumann B, Simon P, Ziemer G, Wendel HP. Veins are no arteries: even moderate arterial pressure induces significant adhesion molecule expression of vein grafts in an ex vivo circulation model. J Cardiovasc Surg (Torino) 2011; 52:251-259. [PMID: 21460776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
AIM Coronary artery bypass grafting (CABG) is a standard procedure for treatment of coronary heart disease. Eighty percent of all CABGs are performed with venous grafts which then get exposed to an arterial pressure after surgery. This widely used procedure, however, is complicated by the development of alterations in the vein graft wall, leading to a decreased patency rate and graft failure. This study enlightens the influence of an even moderate arterial pressure on the gene expression of adhesion molecules in venous grafts which play a decisive role for the early induction of atherogenesis. METHODS Segments of porcine vena jugularis and arteria carotis were mounted in a simulated bypass circuit and subjected to pulsatile flow. Vessel segments were examined for adhesion molecule expression with quantitative real-time - polymerase chain reaction (qRT-PCR) and adherence of leukocytes was observed by confocal laser scanning microscopy and scanning electron microscopy. RESULTS Veins grafts subjected to an even moderate arterial pressure showed a 14-fold increase of ICAM-1 expression already after 4 hours. An arterial pressure of around 100/80 mmHg was enough to stimulate the adhesion molecule expression Furthermore it led to a 9-fold increase of leukocyte adhesion to the venous endothelium, but, in contrast this was not the case in arteries. CONCLUSION This study showed, that already 100 mmHg upregulates the expression of several adhesion molecules in pig veins followed by increased adhesion of leukocytes. Therefore, our data demonstrate the advantage of arteries for CABG, and that new therapeutic strategies are urgently necessary to protect vein grafts either physically or pharmacologically if arteries are not available for CABG.
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Affiliation(s)
- A Nolte
- Department of Congenital and Pediatric Cardiac Surgery, Children Hospital, Clinical Research Laboratory, University Hospital Tuebingen, Germany
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Weber L, Kahlert J, Stammler HG, Neumann B. Syntheses, Structure, Electrochemistry, and Optical Properties of 1,3-Diethyl-2,3-dihydro-1-H-1,3,2-pyrido-[4,5-b]-diazaboroles. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200800157] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Barton OG, Neumann B, Stammler HG, Mattay J. Intramolecular direct arylation in an A,C-functionalized calix[4]arene. Org Biomol Chem 2008; 6:104-11. [DOI: 10.1039/b713357j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Weber L, Noveski G, Stammler HG, Neumann B. Synthese, Struktur und Reaktivität von η3-1,2-Diphosphaallylkomplexen sowie von [{(η5-C5H5)(CO)2W–Co(CO)3}{μ-AsCH(SiMe3)2}(μ-CO)]. Z Anorg Allg Chem 2008. [DOI: 10.1002/zaac.200700352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Schäfer R, Wiskirchen J, Guo K, Neumann B, Kehlbach R, Pintaske J, Voth V, Walker T, Scheule AM, Greiner TO, Hermanutz-Klein U, Claussen CD, Northoff H, Ziemer G, Wendel HP. Aptamer-based isolation and subsequent imaging of mesenchymal stem cells in ischemic myocard by magnetic resonance imaging. ROFO-FORTSCHR RONTG 2007; 179:1009-15. [PMID: 17879173 DOI: 10.1055/s-2007-963409] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
PURPOSE Mesenchymal stem cells (MSC) seem to be a promising cell source for cellular cardiomyoplasty. We recently developed a new aptamer-based specific selection of MSC to provide "ready to transplant" cells directly after isolation. We evaluated MRI tracking of newly isolated and freshly transplanted MSC in the heart using one short ex vivo selection step combining specific aptamer-based isolation and labeling of the cells. MATERIALS AND METHODS Bone marrow (BM) was collected from healthy pigs. The animals were euthanized and the heart was placed in a perfusion model. During cold ischemia, immunomagnetic isolation of MSC from the BM by MSC-specific aptamers labeled with Dynabeads was performed within 2 h. For histological identification the cells were additionally stained with PKH26. Approx. 3 x 10(6) of the freshly aptamer-isolated cells were injected into the ramus interventricularis anterior (RIVA) and 5 x 10(5) cells were injected directly into myocardial tissue after damaging the respective area by freezing (cryo-scar). 3 x 10(6) of the aptamer-isolated cells were kept for further characterization (FACS and differentiation assays). 20 h after cell transplantation, MRI of the heart using a clinical 3.0 Tesla whole body scanner (Magnetom Trio, Siemens, Germany) was performed followed by histological examinations. RESULTS The average yield of sorted cells from 120 ml BM was 7 x 10(6) cells. The cells were cultured and showed MSC-like properties. MRI showed reproducible artifacts within the RIVA-perfusion area and the cryo-scar with surprisingly excellent quality. The histological examination of the biopsies showed PKH26-positive cells within the areas which were positive in the MRI in contrast to the control biopsies. CONCLUSION Immunomagnetic separation of MSC by specific aptamers linked to magnetic particles is feasible, effective and combines a specific separation and labeling technique to a "one stop shop" strategy.
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Affiliation(s)
- R Schäfer
- Institut für Klinische und Experimentelle Transfusionsmedizin, Universitätsklinikum Tübingen
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Weber L, Noveski G, Stammler HG, Neumann B. Über den Phosphandiyl-Transfer von invers-polarisierten Phosphaalkenen R1P=C(NMe2)2 (R1 =tBu, Cy, Ph, H) auf Phospheniumkomplexe [(η5-C5H5)(CO)2M=P(R2)R3] (R2 = R3 = Ph; R2 =tBu, R3 = H; R2 = Ph, R3 = N(SiMe3)2). Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200700034] [Citation(s) in RCA: 8] [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: 11/06/2022]
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Weber L, Penner A, Domke I, Stammler HG, Neumann B. Synthese, Struktur, Elektrochemie und optische Eigenschaften von alkinylfunktionalisierten 1,3,2-Diazaborolen und 1,3,2-Diazaborolidinen. Z Anorg Allg Chem 2007. [DOI: 10.1002/zaac.200600351] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Scheule AM, Walker T, Munteanu C, Lescan M, Neumann B, Wendel HP, Ziemer G. Duration of reperfusion period after cardioplegic arrest – is more better? A piglet working heart study. Thorac Cardiovasc Surg 2007. [DOI: 10.1055/s-2007-967550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Tzvetkov NT, Neumann B, Stammler HG, Mattay J. Crystal structure of (7a'SR)-7a'-prop-2-ynyl-1',2',4',6',7',7a'- hexahydrospiro[1,3-dioxolan-2,5'-indene], C14H18O2. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.0163] [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: 11/24/2022]
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Tzvetkov ΝT, Neumann B, Stammler HG, Mattay J. Crystal structure of (1aSR,3aRS,7aSR)-3a-but-2-ynyl-1a,2,3,3a,4,5-hexahydro-1H-cyclopropa[c]inden-6(7H)-one,C14H18O. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.221.14.481] [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: 11/24/2022]
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Weber L, Krümberg J, Stammler HG, Neumann B. Neue Kupferkomplexe mit Phosphaalkenliganden. Molekülstruktur von [Cu{P(Mes*)C(NMe2)2}2]BF4 (Mes* = 2,4,6-tBu3C6H2). Z Anorg Allg Chem 2006. [DOI: 10.1002/zaac.200600015] [Citation(s) in RCA: 9] [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: 11/07/2022]
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Tzvetkov ΝT, Neumann B, Stammler HG, Mattay J. Crystal structure of(7a' SR)-7a'-prop-2-ynyl-1',2',4',6',7',7 a-hexahydrospiro[1,3-dioxolan-2,5'-indene],C14H18O2. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.221.14.479] [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: 11/24/2022]
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Bader J, Neumann B, Schwab K, Popovic M, Scheler C, Bajpai R. α-Amylase Production in Fed-Batch Cultivation ofBacillus caldolyticus. CHEM-ING-TECH 2005. [DOI: 10.1002/cite.200590158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Weber L, Rausch A, Stammler HG, Neumann B. Chirale 1,3,2-Oxazaborolidine aus chiralen 2,3-Dihydro-1H-1,3,2-diazaborolen und Diphenylketen. Z Anorg Allg Chem 2005. [DOI: 10.1002/zaac.200500054] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sönnichsen B, Koski LB, Walsh A, Marschall P, Neumann B, Brehm M, Alleaume AM, Artelt J, Bettencourt P, Cassin E, Hewitson M, Holz C, Khan M, Lazik S, Martin C, Nitzsche B, Ruer M, Stamford J, Winzi M, Heinkel R, Röder M, Finell J, Häntsch H, Jones SJM, Jones M, Piano F, Gunsalus KC, Oegema K, Gönczy P, Coulson A, Hyman AA, Echeverri CJ. Full-genome RNAi profiling of early embryogenesis in Caenorhabditis elegans. Nature 2005; 434:462-9. [PMID: 15791247 DOI: 10.1038/nature03353] [Citation(s) in RCA: 673] [Impact Index Per Article: 35.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2004] [Accepted: 01/10/2005] [Indexed: 11/09/2022]
Abstract
A key challenge of functional genomics today is to generate well-annotated data sets that can be interpreted across different platforms and technologies. Large-scale functional genomics data often fail to connect to standard experimental approaches of gene characterization in individual laboratories. Furthermore, a lack of universal annotation standards for phenotypic data sets makes it difficult to compare different screening approaches. Here we address this problem in a screen designed to identify all genes required for the first two rounds of cell division in the Caenorhabditis elegans embryo. We used RNA-mediated interference to target 98% of all genes predicted in the C. elegans genome in combination with differential interference contrast time-lapse microscopy. Through systematic annotation of the resulting movies, we developed a phenotypic profiling system, which shows high correlation with cellular processes and biochemical pathways, thus enabling us to predict new functions for previously uncharacterized genes.
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Affiliation(s)
- B Sönnichsen
- Cenix BioScience GmbH, Tatzberg 47-51, D-01307 Dresden, Germany.
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Abstract
Integrins are a family of cell surface proteins that function as receptors for extracellular matrix ligands and for some viruses. A subset of integrins recognises peptide sequences containing arginine-glycine-aspartic acid (RGD) motifs as ligands. The B-lymphotropic polyomavirus (LPV) has a non-enveloped capsid that recognises a sialylated cell surface receptor. To change the receptor binding specificity we have replaced sets of three amino acids in three predicted surface loops of the major capsid protein VP1 of the B-lymphotropic polyomavirus LPV by RGD. Ten mutants gave rise to the expected 40 kDa VP1 protein upon expression from a baculovirus vector in insect cells. Five of the VP1 mutants representing all three surface loops have retained the ability to spontaneously assemble to capsids in the nuclei of the insect cells. Structural changes of the mutant capsid surface were shown by differential reactivity with a set of 7 neutralising monoclonal antibodies that recognise conformational surface epitopes of wildtype LPV virions. In addition all mutant capsids had lost specific binding to the LPV receptor. Three mutant capsids of one loop (BC) showed specific binding to alpha(v)beta3 integrin but not to integrins alpha(v)beta5, alpha(v)beta6, or to alpha(IIb)beta3 known also to recognise RGD containing peptide sequences. This selective binding of the mutant capsids could be inhibited by synthetic peptides that specifically bind to alpha(v)beta3 integrin with IC50 values between 10 and 40 nM.
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Affiliation(s)
- J Langner
- Research Program Infection and Cancer, Deutsches Krebsforschungszentrum, Heidelberg, Germany
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Arsene I, Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Ito H, Jipa A, Jørdre JI, Jundt F, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Lindal S, Lystad R, Løvhøiden G, Majka Z, Makeev A, Mikelsen M, Murray M, Natowitz J, Neumann B, Nielsen BS, Ouerdane D, Płaneta R, Rami F, Ristea C, Ristea O, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Sheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Yin Z, Zgura IS. Centrality dependence of charged-particle pseudorapidity distributions from d + Au collisions at sqrt[sNN] = 200 GeV. Phys Rev Lett 2005; 94:032301. [PMID: 15698255 DOI: 10.1103/physrevlett.94.032301] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2004] [Indexed: 05/24/2023]
Abstract
Charged-particle pseudorapidity densities are presented for the d + Au reaction at sqrt[s(NN)] = 200 GeV with -4.2 < or = eta < or = 4.2. The results, from the BRAHMS experiment at BNL Relativistic Heavy-Ion Collider, are shown for minimum-bias events and 0%-30%, 30%-60%, and 60%-80% centrality classes. Models incorporating both soft physics and hard, perturbative QCD-based scattering physics agree well with the experimental results. The data do not support predictions based on strong-coupling, semiclassical QCD. In the deuteron-fragmentation region the central 200 GeV data show behavior similar to full-overlap d+Au results at sqrt[s(NN)] = 19.4 GeV.
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Affiliation(s)
- I Arsene
- University of Bucharest, Bucharest, Romania
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Arsene I, Bearden IG, Beavis D, Besliu C, Budick B, Bøggild H, Chasman C, Christensen CH, Christiansen P, Cibor J, Debbe R, Enger E, Gaardhøje JJ, Germinario M, Hagel K, Ito H, Jipa A, Jundt F, Jørdre JI, Jørgensen CE, Karabowicz R, Kim EJ, Kozik T, Larsen TM, Lee JH, Lee YK, Lindal S, Lystad R, Løvhøiden G, Majka Z, Makeev A, Mikelsen M, Murray M, Natowitz J, Neumann B, Nielsen BS, Ouerdane D, Płaneta R, Rami F, Ristea C, Ristea O, Röhrich D, Samset BH, Sandberg D, Sanders SJ, Scheetz RA, Staszel P, Tveter TS, Videbaek F, Wada R, Yin Z, Zgura IS. Evolution of the nuclear modification factors with rapidity and centrality in d + Au collisions at (sqrt)[N(S)N]=200 GeV. Phys Rev Lett 2004; 93:242303. [PMID: 15697798 DOI: 10.1103/physrevlett.93.242303] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2004] [Revised: 08/27/2004] [Indexed: 05/24/2023]
Abstract
We report on a study of the transverse momentum dependence of nuclear modification factors R(dAu) for charged hadrons produced in deuteron + gold collisions at sqrt[s(NN)]=200 GeV, as a function of collision centrality and of the pseudorapidity (eta=0, 1, 2.2, 3.2) of the produced hadrons. We find a significant and systematic decrease of R(dAu) with increasing rapidity. The midrapidity enhancement and the forward rapidity suppression are more pronounced in central collisions relative to peripheral collisions. These results are relevant to the study of the possible onset of gluon saturation at energies reached at BNL RHIC.
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Affiliation(s)
- I Arsene
- Brookhaven National Laboratory, Upton, NY 11973, USA
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Weber L, Rausch A, Stammler HG, Neumann B. Synthese und Struktur hochfunktionalisierter 2, 3-Dihydro-1H-1, 3, 2-diazaborole. Z Anorg Allg Chem 2004. [DOI: 10.1002/zaac.200400295] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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