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Drost CC, Unger A, Linke WA, Vink H, Kümpers P. The dynamics of the endothelial glycocalyx: a rare snapshot by electron microscopy. Angiogenesis 2023; 26:487-491. [PMID: 37184739 PMCID: PMC10184622 DOI: 10.1007/s10456-023-09880-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 04/25/2023] [Indexed: 05/16/2023]
Affiliation(s)
- Carolin C Drost
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany.
| | - Andreas Unger
- Institute of Physiology II, University Hospital Münster, Münster, Germany
| | - Wolfgang A Linke
- Institute of Physiology II, University Hospital Münster, Münster, Germany
| | - Hans Vink
- Department of Physiology, Cardiovascular Research Institute Maastricht, Maastricht University, Maastricht, The Netherlands
- Microvascular Health Solutions, Alpine, USA
| | - Philipp Kümpers
- Department of Medicine D, Division of General Internal Medicine, Nephrology, and Rheumatology, University Hospital Münster, Münster, Germany
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2
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Gamble DT, Ross J, Khan H, Unger A, Cheyne L, Rudd A, Saunders F, Srivanasan J, Kamya S, Horgan G, Hannah A, Baliga S, Tocchetti CG, Urquhart G, Linke WA, Masannat Y, Mustafa A, Fuller M, Elsberger B, Sharma R, Dawson D. Impaired Cardiac and Skeletal Muscle Energetics Following Anthracycline Therapy for Breast Cancer. Circ Cardiovasc Imaging 2023; 16:e015782. [PMID: 37847761 PMCID: PMC10581415 DOI: 10.1161/circimaging.123.015782] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 09/12/2023] [Indexed: 10/19/2023]
Abstract
BACKGROUND Anthracycline-related cardiac toxicity is a recognized consequence of cancer therapies. We assess resting cardiac and skeletal muscle energetics and myocyte, sarcomere, and mitochondrial integrity in patients with breast cancer receiving epirubicin. METHODS In a prospective, mechanistic, observational, longitudinal study, we investigated chemotherapy-naive patients with breast cancer receiving epirubicin versus sex- and age-matched healthy controls. Resting energetic status of cardiac and skeletal muscle (phosphocreatine/gamma ATP and inorganic phosphate [Pi]/phosphocreatine, respectively) was assessed with 31P-magnetic resonance spectroscopy. Cardiac function and tissue characterization (magnetic resonance imaging and 2D-echocardiography), cardiac biomarkers (serum NT-pro-BNP and high-sensitivity troponin I), and structural assessments of skeletal muscle biopsies were obtained. All study assessments were performed before and after chemotherapy. RESULTS Twenty-five female patients with breast cancer (median age, 53 years) received a mean epirubicin dose of 304 mg/m2, and 25 age/sex-matched controls were recruited. Despite comparable baseline cardiac and skeletal muscle energetics with the healthy controls, after chemotherapy, patients with breast cancer showed a reduction in cardiac phosphocreatine/gamma ATP ratio (2.0±0.7 versus 1.1±0.5; P=0.001) and an increase in skeletal muscle Pi/phosphocreatine ratio (0.1±0.1 versus 0.2±0.1; P=0.022). This occurred in the context of increases in left ventricular end-systolic and end-diastolic volumes (P=0.009 and P=0.008, respectively), T1 and T2 mapping (P=0.001 and P=0.028, respectively) but with preserved left ventricular ejection fraction, mass and global longitudinal strain, and no change in cardiac biomarkers. There was preservation of the mitochondrial copy number in skeletal muscle biopsies but a significant increase in areas of skeletal muscle degradation (P=0.001) in patients with breast cancer following chemotherapy. Patients with breast cancer demonstrated a reduction in skeletal muscle sarcomere number from the prechemotherapy stage compared with healthy controls (P=0.013). CONCLUSIONS Contemporary doses of epirubicin for breast cancer treatment result in a significant reduction of cardiac and skeletal muscle high-energy 31P-metabolism alongside structural skeletal muscle changes. REGISTRATION URL: https://www. CLINICALTRIALS gov; Unique identifier: NCT04467411.
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Affiliation(s)
- David T. Gamble
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - James Ross
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Hilal Khan
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Andreas Unger
- Institute of Physiology II, University of Münster, Germany (A.U., W.A.L.)
| | - Lesley Cheyne
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Amelia Rudd
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Fiona Saunders
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Janaki Srivanasan
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Sylvia Kamya
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
| | - Graham Horgan
- Biomathematics and Statistics Scotland, Aberdeen (G.H.)
| | - Andrew Hannah
- Department of Cardiology National Health Service (NHS) Grampian (A.H.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Santosh Baliga
- Department of Trauma and Orthopaedic Surgery (S.B.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Carlo Gabriele Tocchetti
- Department of Translational Medical Sciences (DISMET), Center for Basic and Clinical Immunology Research (CISI), Interdepartmental Center of Clinical and Translational Sciences (CIRCET), Interdepartmental Hypertension Research Center (CIRIAPA), Federico II University, Naples, Italy (C.G.T.)
| | - Gordon Urquhart
- Department of Oncology NHS Grampian (G.U., R.S.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Wolfgang A. Linke
- Institute of Physiology II, University of Münster, Germany (A.U., W.A.L.)
| | - Yazan Masannat
- Department of Breast Surgery NHS Grampian (Y.M., A.M., M.F., B.E.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Ahmed Mustafa
- Department of Breast Surgery NHS Grampian (Y.M., A.M., M.F., B.E.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Mairi Fuller
- Department of Breast Surgery NHS Grampian (Y.M., A.M., M.F., B.E.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Beatrix Elsberger
- Department of Breast Surgery NHS Grampian (Y.M., A.M., M.F., B.E.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Ravi Sharma
- Department of Oncology NHS Grampian (G.U., R.S.), Aberdeen Royal Infirmary, Foresterhill, Scotland, United Kingdom
| | - Dana Dawson
- Cardiology Research Group, Aberdeen Cardiovascular and Diabetes Centre, School of Medicine and Dentistry, University of Aberdeen, United Kingdom (D.T.G., J.R., H.K., L.C., A.R., F.S., J.S., S.K., D.D.)
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3
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Li J, Sundnes J, Hou Y, Laasmaa M, Ruud M, Unger A, Kolstad TR, Frisk M, Norseng PA, Yang L, Setterberg IE, Alves ES, Kalakoutis M, Sejersted OM, Lanner JT, Linke WA, Lunde IG, de Tombe PP, Louch WE. Stretch Harmonizes Sarcomere Strain Across the Cardiomyocyte. Circ Res 2023; 133:255-270. [PMID: 37401464 PMCID: PMC10355805 DOI: 10.1161/circresaha.123.322588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2023] [Revised: 06/07/2023] [Accepted: 06/22/2023] [Indexed: 07/05/2023]
Abstract
BACKGROUND Increasing cardiomyocyte contraction during myocardial stretch serves as the basis for the Frank-Starling mechanism in the heart. However, it remains unclear how this phenomenon occurs regionally within cardiomyocytes, at the level of individual sarcomeres. We investigated sarcomere contractile synchrony and how intersarcomere dynamics contribute to increasing contractility during cell lengthening. METHODS Sarcomere strain and Ca2+ were simultaneously recorded in isolated left ventricular cardiomyocytes during 1 Hz field stimulation at 37 °C, at resting length and following stepwise stretch. RESULTS We observed that in unstretched rat cardiomyocytes, differential sarcomere deformation occurred during each beat. Specifically, while most sarcomeres shortened during the stimulus, ≈10% to 20% of sarcomeres were stretched or remained stationary. This nonuniform strain was not traced to regional Ca2+ disparities but rather shorter resting lengths and lower force production in systolically stretched sarcomeres. Lengthening of the cell recruited additional shortening sarcomeres, which increased contractile efficiency as less negative, wasted work was performed by stretched sarcomeres. Given the known role of titin in setting sarcomere dimensions, we next hypothesized that modulating titin expression would alter intersarcomere dynamics. Indeed, in cardiomyocytes from mice with titin haploinsufficiency, we observed greater variability in resting sarcomere length, lower recruitment of shortening sarcomeres, and impaired work performance during cell lengthening. CONCLUSIONS Graded sarcomere recruitment directs cardiomyocyte work performance, and harmonization of sarcomere strain increases contractility during cell stretch. By setting sarcomere dimensions, titin controls sarcomere recruitment, and its lowered expression in haploinsufficiency mutations impairs cardiomyocyte contractility.
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Affiliation(s)
- Jia Li
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | | | - Yufeng Hou
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Martin Laasmaa
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Marianne Ruud
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Andreas Unger
- Institute of Physiology II, University of Münster, Germany (A.U., W.A.L.)
| | - Terje R. Kolstad
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Michael Frisk
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Per Andreas Norseng
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
| | | | - Ingunn E. Setterberg
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Estela S. Alves
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden (E.S.A., M.K., J.T.L.)
| | - Michaeljohn Kalakoutis
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden (E.S.A., M.K., J.T.L.)
| | - Ole M. Sejersted
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Johanna T. Lanner
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden (E.S.A., M.K., J.T.L.)
| | - Wolfgang A. Linke
- Institute of Physiology II, University of Münster, Germany (A.U., W.A.L.)
| | - Ida G. Lunde
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
| | - Pieter P. de Tombe
- Department of Physiology and Biophysics, University of Illinois at Chicago (P.P.d.T.)
- Phymedexp, Université de Montpellier, INSERM, CNRS, France (P.P.d.T.)
| | - William E. Louch
- Institute for Experimental Medical Research, Oslo University Hospital and University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., P.A.N., I.E.S., O.M.S., I.G.L., W.E.L.)
- KG Jebsen Center for Cardiac Research, University of Oslo, Norway (J.L., Y.H., M.L., M.R., T.R.K., M.F., I.E.S., O.M.S., I.G.L., W.E.L.)
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4
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Toffali L, D'Ulivo B, Giagulli C, Montresor A, Zenaro E, Delledonne M, Rossato M, Iadarola B, Sbarbati A, Bernardi P, Angelini G, Rossi B, Lopez N, Linke WA, Unger A, Di Silvestre D, Benazzi L, De Palma A, Motta S, Constantin G, Mauri P, Laudanna C. An isoform of the giant protein titin is a master regulator of human T lymphocyte trafficking. Cell Rep 2023; 42:112516. [PMID: 37204926 DOI: 10.1016/j.celrep.2023.112516] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/24/2023] [Accepted: 05/01/2023] [Indexed: 05/21/2023] Open
Abstract
Response to multiple microenvironmental cues and resilience to mechanical stress are essential features of trafficking leukocytes. Here, we describe unexpected role of titin (TTN), the largest protein encoded by the human genome, in the regulation of mechanisms of lymphocyte trafficking. Human T and B lymphocytes express five TTN isoforms, exhibiting cell-specific expression, distinct localization to plasma membrane microdomains, and different distribution to cytosolic versus nuclear compartments. In T lymphocytes, the LTTN1 isoform governs the morphogenesis of plasma membrane microvilli independently of ERM protein phosphorylation status, thus allowing selectin-mediated capturing and rolling adhesions. Likewise, LTTN1 controls chemokine-triggered integrin activation. Accordingly, LTTN1 mediates rho and rap small GTPases activation, but not actin polymerization. In contrast, chemotaxis is facilitated by LTTN1 degradation. Finally, LTTN1 controls resilience to passive cell deformation and ensures T lymphocyte survival in the blood stream. LTTN1 is, thus, a critical and versatile housekeeping regulator of T lymphocyte trafficking.
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Affiliation(s)
- Lara Toffali
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy
| | - Beatrice D'Ulivo
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy
| | - Cinzia Giagulli
- Department of Molecular and Translational Medicine, University of Brescia; 25123 Brescia, Lombardia, Italy
| | - Alessio Montresor
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy; The Center for Biomedical Computing (CBMC), University of Verona; 37134 Verona, Veneto, Italy
| | - Elena Zenaro
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy
| | - Massimo Delledonne
- Department of Biotechnology, University of Verona; 37134 Verona, Veneto, Italy
| | - Marzia Rossato
- Department of Biotechnology, University of Verona; 37134 Verona, Veneto, Italy
| | - Barbara Iadarola
- Department of Biotechnology, University of Verona; 37134 Verona, Veneto, Italy
| | - Andrea Sbarbati
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona; 37134 Verona, Veneto, Italy
| | - Paolo Bernardi
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona; 37134 Verona, Veneto, Italy
| | - Gabriele Angelini
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy
| | - Barbara Rossi
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy
| | - Nicola Lopez
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy
| | - Wolfgang A Linke
- Institute of Physiology II, University of Muenster, and Heart Center, University Medicine; 37075 Göttingen, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Muenster, and Heart Center, University Medicine; 37075 Göttingen, Germany
| | - Dario Di Silvestre
- Institute of Biomedical Technologies (ITB) CNR; 20090 Milan, Lombardia, Italy
| | - Louise Benazzi
- Institute of Biomedical Technologies (ITB) CNR; 20090 Milan, Lombardia, Italy
| | - Antonella De Palma
- Institute of Biomedical Technologies (ITB) CNR; 20090 Milan, Lombardia, Italy
| | - Sara Motta
- Institute of Biomedical Technologies (ITB) CNR; 20090 Milan, Lombardia, Italy
| | - Gabriela Constantin
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy; The Center for Biomedical Computing (CBMC), University of Verona; 37134 Verona, Veneto, Italy
| | - Pierluigi Mauri
- Institute of Biomedical Technologies (ITB) CNR; 20090 Milan, Lombardia, Italy
| | - Carlo Laudanna
- Department of Medicine, Division of General Pathology, Laboratory of Cell Trafficking and Signal Transduction, University of Verona; 37134 Verona, Veneto, Italy; The Center for Biomedical Computing (CBMC), University of Verona; 37134 Verona, Veneto, Italy.
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5
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Sellung D, Heil L, Daya N, Jacobsen F, Mertens-Rill J, Zhuge H, Döring K, Piran M, Milting H, Unger A, Linke WA, Kley R, Preusse C, Roos A, Fürst DO, Ven PFMVD, Vorgerd M. Novel Filamin C Myofibrillar Myopathy Variants Cause Different Pathomechanisms and Alterations in Protein Quality Systems. Cells 2023; 12:cells12091321. [PMID: 37174721 PMCID: PMC10177260 DOI: 10.3390/cells12091321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
Myofibrillar myopathies (MFM) are a group of chronic muscle diseases pathophysiologically characterized by accumulation of protein aggregates and structural failure of muscle fibers. A subtype of MFM is caused by heterozygous mutations in the filamin C (FLNC) gene, exhibiting progressive muscle weakness, muscle structural alterations and intracellular protein accumulations. Here, we characterize in depth the pathogenicity of two novel truncating FLNc variants (p.Q1662X and p.Y2704X) and assess their distinct effect on FLNc stability and distribution as well as their impact on protein quality system (PQS) pathways. Both variants cause a slowly progressive myopathy with disease onset in adulthood, chronic myopathic alterations in muscle biopsy including the presence of intracellular protein aggregates. Our analyses revealed that p.Q1662X results in FLNc haploinsufficiency and p.Y2704X in a dominant-negative FLNc accumulation. Moreover, both protein-truncating variants cause different PQS alterations: p.Q1662X leads to an increase in expression of several genes involved in the ubiquitin-proteasome system (UPS) and the chaperone-assisted selective autophagy (CASA) system, whereas p.Y2704X results in increased abundance of proteins involved in UPS activation and autophagic buildup. We conclude that truncating FLNC variants might have different pathogenetic consequences and impair PQS function by diverse mechanisms and to varying extents. Further studies on a larger number of patients are necessary to confirm our observations.
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Affiliation(s)
- Dominik Sellung
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Lorena Heil
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Nassam Daya
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Frank Jacobsen
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Janine Mertens-Rill
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Heidi Zhuge
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Kristina Döring
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Misagh Piran
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Wolfgang A Linke
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Rudi Kley
- Department of Neurology and Clinical Neurophysiology, St. Marien-Hospital Borken, 46325 Borken, Germany
| | - Corinna Preusse
- Department of Neuropathology, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Andreas Roos
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Dieter O Fürst
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Peter F M van der Ven
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Matthias Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
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6
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Unger A, Roos A, Gangfuß A, Hentschel A, Gläser D, Krause K, Doering K, Schara-Schmidt U, Hoffjan S, Vorgerd M, Güttsches AK. Microscopic and Biochemical Hallmarks of BICD2-Associated Muscle Pathology toward the Evaluation of Novel Variants. Int J Mol Sci 2023; 24:ijms24076808. [PMID: 37047781 PMCID: PMC10095373 DOI: 10.3390/ijms24076808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 04/02/2023] [Accepted: 04/03/2023] [Indexed: 04/08/2023] Open
Abstract
BICD2 variants have been linked to neurodegenerative disorders like spinal muscular atrophy with lower extremity predominance (SMALED2) or hereditary spastic paraplegia (HSP). Recently, mutations in BICD2 were implicated in myopathies. Here, we present one patient with a known and six patients with novel BICD2 missense variants, further characterizing the molecular landscape of this heterogenous neurological disorder. A total of seven patients were genotyped and phenotyped. Skeletal muscle biopsies were analyzed by histology, electron microscopy, and protein profiling to define pathological hallmarks and pathogenicity markers with consecutive validation using fluorescence microscopy. Clinical and MRI-features revealed a typical pattern of distal paresis of the lower extremities as characteristic features of a BICD2-associated disorder. Histological evaluation showed myopathic features of varying severity including fiber size variation, lipofibromatosis, and fiber splittings. Proteomic analysis with subsequent fluorescence analysis revealed an altered abundance and localization of thrombospondin-4 and biglycan. Our combined clinical, histopathological, and proteomic approaches provide new insights into the pathophysiology of BICD2-associated disorders, confirming a primary muscle cell vulnerability. In this context, biglycan and thrombospondin-4 have been identified, may serve as tissue pathogenicity markers, and might be linked to perturbed protein secretion based on an impaired vesicular transportation.
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Affiliation(s)
- Andreas Unger
- Department of Cardiovascular Medicine, Institute for Genetics of Heart Disease (IfGH), University Hospital Münster, 48149 Münster, Germany
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Andreas Roos
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr University Bochum, 44789 Bochum, Germany
- Department of Pediatric Neurology, Centre for Neuromuscular Disorders, Centre for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45122 Essen, Germany
- Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON K1H 8L1, Canada
| | - Andrea Gangfuß
- Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON K1H 8L1, Canada
| | - Andreas Hentschel
- Leibniz-Institut für Analytische Wissenschaften-ISAS-e.V., 44139 Dortmund, Germany
| | - Dieter Gläser
- Genetikum, Center for Human Genetics, 89231 Neu-Ulm, Germany
| | - Karsten Krause
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr University Bochum, 44789 Bochum, Germany
| | - Kristina Doering
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Ulrike Schara-Schmidt
- Department of Pediatric Neurology, Centre for Neuromuscular Disorders, Centre for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45122 Essen, Germany
| | - Sabine Hoffjan
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Matthias Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr University Bochum, 44789 Bochum, Germany
| | - Anne-Katrin Güttsches
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr University Bochum, 44789 Bochum, Germany
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7
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Rohrbeck M, Hoerr V, Piccini I, Greber B, Schulte JS, Hübner SS, Jeworutzki E, Theiss C, Matschke V, Stypmann J, Unger A, Ho HT, Disse P, Strutz-Seebohm N, Faber C, Müller FU, Ludwig S, Rescher U, Linke WA, Klingel K, Busch K, Peischard S, Seebohm G. Pathophysiological Mechanisms of Cardiac Dysfunction in Transgenic Mice with Viral Myocarditis. Cells 2023; 12:cells12040550. [PMID: 36831217 PMCID: PMC9954433 DOI: 10.3390/cells12040550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 01/21/2023] [Accepted: 01/30/2023] [Indexed: 02/11/2023] Open
Abstract
Viral myocarditis is pathologically associated with RNA viruses such as coxsackievirus B3 (CVB3), or more recently, with SARS-CoV-2, but despite intensive research, clinically proven treatment is limited. Here, by use of a transgenic mouse strain (TG) containing a CVB3ΔVP0 genome we unravel virus-mediated cardiac pathophysiological processes in vivo and in vitro. Cardiac function, pathologic ECG alterations, calcium homeostasis, intracellular organization and gene expression were significantly altered in transgenic mice. A marked alteration of mitochondrial structure and gene expression indicates mitochondrial impairment potentially contributing to cardiac contractile dysfunction. An extended picture on viral myocarditis emerges that may help to develop new treatment strategies and to counter cardiac failure.
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Affiliation(s)
- Matthias Rohrbeck
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Verena Hoerr
- Translational Research Imaging Center, Clinic of Radiology, University Hospital Münster, D-48149 Münster, Germany
| | - Ilaria Piccini
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Boris Greber
- Human Stem Cell Pluripotency Laboratory, Max Planck Institute for Molecular Biomedicine, D-48149 Münster, Germany
- Chemical Genomics Centre of the Max Planck Society, 44227 Dortmund, Germany
| | - Jan Sebastian Schulte
- Institute of Pharmacology and Toxicology, University Hospital Münster, D-48149 Münster, Germany
| | - Sara-Sophie Hübner
- Translational Research Imaging Center, Clinic of Radiology, University Hospital Münster, D-48149 Münster, Germany
| | - Elena Jeworutzki
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Carsten Theiss
- Department of Cytology, Institute of Anatomy, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Veronika Matschke
- Department of Cytology, Institute of Anatomy, Ruhr-University Bochum, D-44780 Bochum, Germany
| | - Jörg Stypmann
- Department of Cardiovascular Medicine, Division of Cardiology, University Clinic Münster, 48149 Münster, Germany
| | - Andreas Unger
- Institute of Physiology II, Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Huyen Tran Ho
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Paul Disse
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Nathalie Strutz-Seebohm
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
| | - Cornelius Faber
- Translational Research Imaging Center, Clinic of Radiology, University Hospital Münster, D-48149 Münster, Germany
| | - Frank Ulrich Müller
- Institute of Pharmacology and Toxicology, University Hospital Münster, D-48149 Münster, Germany
| | - Stephan Ludwig
- Institute of Virology Münster (IVM), Centre for Molecular Biology of Inflammation (ZMBE), University of Münster, D-48149 Münster, Germany
| | - Ursula Rescher
- Research Group Regulatory Mechanisms of Inflammation, Institute of Medical Biochemistry, Centre for Molecular Biology of Inflammation, University of Muenster, 48149 Muenster, Germany
| | - Wolfgang A. Linke
- Institute of Physiology II, Faculty of Medicine, University of Münster, D-48149 Münster, Germany
| | - Karin Klingel
- Cardiopathology, Institute for Pathology and Neuropathology, University Hospital of Tübingen, D-72076 Tübingen, Germany
| | - Karin Busch
- Institute of Integrative Cell Biology and Physiology, Faculty of Biology, University of Muenster, Schlossplatz 5, 48149 Muenster, Germany
| | - Stefan Peischard
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
- Correspondence: (S.P.); (G.S.); Tel.: +49-(0)-251/83-58255 (S.P.); +49-(0)-251/83-58251 (G.S.); Fax: +49-(0)-251/83-58257 (S.P. & G.S.)
| | - Guiscard Seebohm
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, D-48149 Münster, Germany
- Correspondence: (S.P.); (G.S.); Tel.: +49-(0)-251/83-58255 (S.P.); +49-(0)-251/83-58251 (G.S.); Fax: +49-(0)-251/83-58257 (S.P. & G.S.)
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8
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Hucke A, Gärtner A, von Frieling-Salewski M, Unger A, Koser F, Regnier M, Toischer K, Milting H, Linke W. Study of the expression of Cronos titin in TTN-truncation cardiomyopathy and heart development. J Mol Cell Cardiol 2022. [DOI: 10.1016/j.yjmcc.2022.08.144] [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: 01/02/2023]
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9
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Freundt J, Unger A, Loescher C, Linke W. Dissecting the contribution of titin and actin filaments to cardiomyocyte passive stiffness. J Mol Cell Cardiol 2022. [DOI: 10.1016/j.yjmcc.2022.08.037] [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: 01/01/2023]
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10
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Shahriyari M, Islam MR, Sakib SM, Rinn M, Rika A, Krüger D, Kaurani L, Gisa V, Winterhoff M, Anandakumar H, Shomroni O, Schmidt M, Salinas G, Unger A, Linke WA, Zschüntzsch J, Schmidt J, Bassel-Duby R, Olson EN, Fischer A, Zimmermann WH, Tiburcy M. Engineered skeletal muscle recapitulates human muscle development, regeneration and dystrophy. J Cachexia Sarcopenia Muscle 2022; 13:3106-3121. [PMID: 36254806 PMCID: PMC9745484 DOI: 10.1002/jcsm.13094] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/29/2022] [Accepted: 09/10/2022] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Human pluripotent stem cell-derived muscle models show great potential for translational research. Here, we describe developmentally inspired methods for the derivation of skeletal muscle cells and their utility in skeletal muscle tissue engineering with the aim to model skeletal muscle regeneration and dystrophy in vitro. METHODS Key steps include the directed differentiation of human pluripotent stem cells to embryonic muscle progenitors followed by primary and secondary foetal myogenesis into three-dimensional muscle. To simulate Duchenne muscular dystrophy (DMD), a patient-specific induced pluripotent stem cell line was compared to a CRISPR/Cas9-edited isogenic control line. RESULTS The established skeletal muscle differentiation protocol robustly and faithfully recapitulates critical steps of embryonic myogenesis in two-dimensional and three-dimensional cultures, resulting in functional human skeletal muscle organoids (SMOs) and engineered skeletal muscles (ESMs) with a regeneration-competent satellite-like cell pool. Tissue-engineered muscle exhibits organotypic maturation and function (up to 5.7 ± 0.5 mN tetanic twitch tension at 100 Hz in ESM). Contractile performance could be further enhanced by timed thyroid hormone treatment, increasing the speed of contraction (time to peak contraction) as well as relaxation (time to 50% relaxation) of single twitches from 107 ± 2 to 75 ± 4 ms (P < 0.05) and from 146 ± 6 to 100 ± 6 ms (P < 0.05), respectively. Satellite-like cells could be documented as largely quiescent PAX7+ cells (75 ± 6% Ki67- ) located adjacent to muscle fibres confined under a laminin-containing basal membrane. Activation of the engineered satellite-like cell niche was documented in a cardiotoxin injury model with marked recovery of contractility to 57 ± 8% of the pre-injury force 21 days post-injury (P < 0.05 compared to Day 2 post-injury), which was completely blocked by preceding irradiation. Absence of dystrophin in DMD ESM caused a marked reduction of contractile force (-35 ± 7%, P < 0.05) and impaired expression of fast myosin isoforms resulting in prolonged contraction (175 ± 14 ms, P < 0.05 vs. gene-edited control) and relaxation (238 ± 22 ms, P < 0.05 vs. gene-edited control) times. Restoration of dystrophin levels by gene editing rescued the DMD phenotype in ESM. CONCLUSIONS We introduce human muscle models with canonical properties of bona fide skeletal muscle in vivo to study muscle development, maturation, disease and repair.
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Affiliation(s)
- Mina Shahriyari
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
| | - Md Rezaul Islam
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE) Göttingen, Göttingen, Germany
| | - Sadman M Sakib
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE) Göttingen, Göttingen, Germany
| | - Malte Rinn
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
| | - Anastasia Rika
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
| | - Dennis Krüger
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE) Göttingen, Göttingen, Germany
| | - Lalit Kaurani
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE) Göttingen, Göttingen, Germany
| | - Verena Gisa
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE) Göttingen, Göttingen, Germany
| | - Mandy Winterhoff
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
| | - Harithaa Anandakumar
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
| | - Orr Shomroni
- NGS Integrative Genomics Core Unit, Institute of Human Genetics, University Medical Center Göttingen, Georg August University, Göttingen, Germany
| | - Matthias Schmidt
- Department of Neurology, Neuromuscular Center, University Medical Center Göttingen, Georg August University, Göttingen, Germany
| | - Gabriela Salinas
- NGS Integrative Genomics Core Unit, Institute of Human Genetics, University Medical Center Göttingen, Georg August University, Göttingen, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Wolfgang A Linke
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Jana Zschüntzsch
- Department of Neurology, Neuromuscular Center, University Medical Center Göttingen, Georg August University, Göttingen, Germany
| | - Jens Schmidt
- Department of Neurology, Neuromuscular Center, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,Department of Neurology and Pain Treatment, Immanuel Klinik Rüdersdorf, University Hospital of the Brandenburg Medical School Theodor Fontane, Rüdersdorf bei Berlin, Germany.,Faculty of Health Sciences Brandenburg, Brandenburg Medical School Theodor Fontane, Rüdersdorf bei Berlin, Germany
| | - Rhonda Bassel-Duby
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Eric N Olson
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Senator Paul D. Wellstone Muscular Dystrophy Cooperative Research Center, University of Texas Southwestern Medical Center, Dallas, TX, USA.,Hamon Center for Regenerative Science and Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - André Fischer
- Department for Epigenetics and Systems Medicine in Neurodegenerative Diseases, German Center for Neurodegenerative Diseases (DZNE) Göttingen, Göttingen, Germany.,Cluster of Excellence 'Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells' (MBExC), University of Göttingen, Göttingen, Germany
| | - Wolfram-Hubertus Zimmermann
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany.,Cluster of Excellence 'Multiscale Bioimaging: from Molecular Machines to Networks of Excitable Cells' (MBExC), University of Göttingen, Göttingen, Germany.,Fraunhofer Institute for Translational Medicine and Pharmacology (ITMP), Göttingen, Germany
| | - Malte Tiburcy
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Georg August University, Göttingen, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Göttingen, Göttingen, Germany
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11
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Liu L, Patnana PK, Xie X, Frank D, Nimmagadda SC, Su M, Zhang D, Koenig T, Rosenbauer F, Liebmann M, Klotz L, Xu W, Vorwerk J, Neumann F, Hüve J, Unger A, Okun JG, Opalka B, Khandanpour C. GFI1B acts as a metabolic regulator in hematopoiesis and acute myeloid leukemia. Leukemia 2022; 36:2196-2207. [PMID: 35804097 PMCID: PMC9417998 DOI: 10.1038/s41375-022-01635-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 06/15/2022] [Accepted: 06/20/2022] [Indexed: 11/09/2022]
Abstract
Recent studies highlighted the role of transcription factors in metabolic regulation during hematopoiesis and leukemia development. GFI1B is a transcriptional repressor that plays a critical role in hematopoiesis, and its expression is negatively related to the prognosis of acute myeloid leukemia (AML) patients. We earlier reported a change in the metabolic state of hematopoietic stem cells upon Gfi1b deletion. Here we explored the role of Gfi1b in metabolism reprogramming during hematopoiesis and leukemogenesis. We demonstrated that Gfi1b deletion remarkably activated mitochondrial respiration and altered energy metabolism dependence toward oxidative phosphorylation (OXPHOS). Mitochondrial substrate dependency was shifted from glucose to fatty acids upon Gfi1b deletion via upregulating fatty acid oxidation (FAO). On a molecular level, Gfi1b epigenetically regulated multiple FAO-related genes. Moreover, we observed that metabolic phenotypes evolved as cells progressed from preleukemia to leukemia, and the correlation between Gfi1b expression level and metabolic phenotype was affected by genetic variations in AML cells. FAO or OXPHOS inhibition significantly impeded leukemia progression of Gfi1b-KO MLL/AF9 cells. Finally, we showed that Gfi1b-deficient AML cells were more sensitive to metformin as well as drugs implicated in OXPHOS and FAO inhibition, opening new potential therapeutic strategies.
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Affiliation(s)
- Longlong Liu
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany
| | - Pradeep Kumar Patnana
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany.,Department of Hematology and Stem Cell Transplantation, University Hospital Essen, University of Duisburg-Essen, 45147, Essen, Germany
| | - Xiaoqing Xie
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany
| | - Daria Frank
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany.,Department of Hematology and Stem Cell Transplantation, University Hospital Essen, University of Duisburg-Essen, 45147, Essen, Germany
| | - Subbaiah Chary Nimmagadda
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany
| | - Minhua Su
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, 300052, Tianjin, China
| | - Donghua Zhang
- Department of Hematology, Tongji Hospital of Tongji Medical College of Huazhong University of Science and Technology, 430030, Wuhan, China
| | - Thorsten Koenig
- Institute of Molecular Tumor Biology, Faculty of Medicine, University of Muenster, 48149, Muenster, Germany
| | - Frank Rosenbauer
- Institute of Molecular Tumor Biology, Faculty of Medicine, University of Muenster, 48149, Muenster, Germany
| | - Marie Liebmann
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, 48149, Muenster, Germany
| | - Luisa Klotz
- Department of Neurology with Institute of Translational Neurology, University Hospital Muenster, 48149, Muenster, Germany
| | - Wendan Xu
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany
| | - Jan Vorwerk
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany
| | - Felix Neumann
- Fluorescence Microscopy Facility Muenster (FM)2, Institute of Medical Physics and Biophysics, University of Muenster, 48149, Muenster, Germany.,evorion biotechnologies GmbH, 48149, Muenster, Germany
| | - Jana Hüve
- Fluorescence Microscopy Facility Muenster (FM)2, Institute of Medical Physics and Biophysics, University of Muenster, 48149, Muenster, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Muenster, 48149, Muenster, Germany
| | - Jürgen Günther Okun
- Department of General Pediatrics, Division of Neuropediatrics and Metabolic Medicine, Dietmar-Hopp-Metabolic Center, 69120, Heidelberg, Germany
| | - Bertram Opalka
- Department of Hematology and Stem Cell Transplantation, University Hospital Essen, University of Duisburg-Essen, 45147, Essen, Germany
| | - Cyrus Khandanpour
- Department of Medicine A, Hematology, Oncology and Pneumology, University Hospital Muenster, 48149, Muenster, Germany. .,Department of Hematology and Oncology, University Hospital of Schleswig-Holstein, University of Luebeck, 23538, Luebeck, Germany.
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12
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Höflich A, Kautzky A, Slamanig R, Kampshoff J, Unger A. Depressive symptoms as a transdiagnostic mediator of mother-to-infant bonding: Results from a psychiatric mother-baby unit. J Psychiatr Res 2022; 149:37-43. [PMID: 35219874 DOI: 10.1016/j.jpsychires.2022.02.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 01/31/2022] [Accepted: 02/14/2022] [Indexed: 11/30/2022]
Abstract
Maternal symptoms of depression can interfere with the establishment of healthy mother-infant-bonding, which negatively affects developmental trajectories of the child and maternal wellbeing. However, current evidence about the effects of treatment in severely affected women is still lacking and the transdiagnostic prognostic value of depressive symptoms is not fully clear. Therefore, a naturalistic clinical sample of 140 mother-infant-dyads in inpatient treatment at a mother-baby-unit was analyzed with instruments being administered at admission and before dismissal. Linear mixed effects models were calculated in order to assess the longitudinal influence of scores on the Edingburgh Postpartum Depression Scale (EPDS) on post-partum-bonding measured with the postpartum bonding questionnaire (PBQ). Furthermore, interaction-effects with psychiatric diagnosis of the mothers (depression vs. psychosis) and their partners were assessed. Successful treatment of depressive symptoms was paralleled by a significant decrease of impaired bonding, with only 6.4% of the women having PBQ total scores above cut-off at discharge. Overall, higher scores on the EPDS were associated with a significantly poorer outcome on the PBQ (p = < 0.001), irrespective of diagnosis (p = 0.93). Importantly, there was an interaction effect of EPDS and a psychiatric diagnosis of the partner on the PBQ (p = 0.017). Thus, our results further emphasize the significance of postpartum symptoms of depression for mother-child bonding, which can be effectively improved by comprehensive treatment even in severely affected women. Optimizing treatment and diagnostics as early as possible and enabling access for all women must become a priority.
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Affiliation(s)
- A Höflich
- Medical University of Vienna, Department of Psychiatry and Psychotherapy, Division of Social Psychiatry, Austria.
| | - A Kautzky
- Medical University of Vienna, Department of Psychiatry and Psychotherapy, Division of Social Psychiatry, Austria
| | - R Slamanig
- Anton Proksch Institute, Vienna, Austria
| | - J Kampshoff
- Medical University of Vienna, Department of Psychiatry and Psychotherapy, Division of Social Psychiatry, Austria
| | - A Unger
- Medical University of Vienna, Department of Psychiatry and Psychotherapy, Division of Social Psychiatry, Austria
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13
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Fomin A, Gärtner A, Cyganek L, Tiburcy M, Tuleta I, Wellers L, Folsche L, Hobbach AJ, von Frieling-Salewsky M, Unger A, Hucke A, Koser F, Kassner A, Sielemann K, Streckfuß-Bömeke K, Hasenfuss G, Goedel A, Laugwitz KL, Moretti A, Gummert JF, Dos Remedios CG, Reinecke H, Knöll R, van Heesch S, Hubner N, Zimmermann WH, Milting H, Linke WA. Truncated titin proteins and titin haploinsufficiency are targets for functional recovery in human cardiomyopathy due to TTN mutations. Sci Transl Med 2021; 13:eabd3079. [PMID: 34731013 DOI: 10.1126/scitranslmed.abd3079] [Citation(s) in RCA: 49] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Andrey Fomin
- Clinic for Cardiology and Pneumology, University Medical Center, 37075 Göttingen, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany
| | - Anna Gärtner
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Lukas Cyganek
- Clinic for Cardiology and Pneumology, University Medical Center, 37075 Göttingen, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany.,Stem Cell Unit, University Medical Center, 37075 Göttingen, Germany.,Institute of Pharmacology and Toxicology, University Medical Center, 37075 Göttingen, Germany
| | - Malte Tiburcy
- German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany.,Institute of Pharmacology and Toxicology, University Medical Center, 37075 Göttingen, Germany
| | - Izabela Tuleta
- Department of Cardiology I, Coronary, Peripheral Vascular Disease and Heart Failure, 48149 University Hospital Münster, Münster, Germany
| | - Luisa Wellers
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Lina Folsche
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Anastasia J Hobbach
- Department of Cardiology I, Coronary, Peripheral Vascular Disease and Heart Failure, 48149 University Hospital Münster, Münster, Germany
| | | | - Andreas Unger
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Anna Hucke
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Franziska Koser
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Astrid Kassner
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Katharina Sielemann
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Katrin Streckfuß-Bömeke
- Clinic for Cardiology and Pneumology, University Medical Center, 37075 Göttingen, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany
| | - Gerd Hasenfuss
- Clinic for Cardiology and Pneumology, University Medical Center, 37075 Göttingen, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany
| | - Alexander Goedel
- First Medical Department, Cardiology, Technical University of Munich, 81675 Munich, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Munich, Germany.,Department of Cell and Molecular Biology, Karolinska Institute, S-17177 Stockholm, Sweden
| | - Karl-Ludwig Laugwitz
- First Medical Department, Cardiology, Technical University of Munich, 81675 Munich, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Munich, Germany.,Munich Heart Alliance, 80802 Munich, Germany
| | - Alessandra Moretti
- First Medical Department, Cardiology, Technical University of Munich, 81675 Munich, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Munich, Germany.,Munich Heart Alliance, 80802 Munich, Germany
| | - Jan F Gummert
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany.,Department of Cardio-Thoracic Surgery, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | | | - Holger Reinecke
- Department of Cardiology I, Coronary, Peripheral Vascular Disease and Heart Failure, 48149 University Hospital Münster, Münster, Germany
| | - Ralph Knöll
- Department of Medicine, Integrated Cardio Metabolic Centre (ICMC), Heart and Vascular Theme, Karolinska Institute, S-17177 Stockholm, Sweden.,Bioscience Cardiovascular, Research and Early Development, Cardiovascular, Renal and Metabolism (CVRM), BioPharmaceuticals R&D, AstraZeneca, 43183 Gothenburg, Sweden
| | - Sebastiaan van Heesch
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, 13125 Berlin, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Berlin, Germany.,Princess Máxima Center for Pediatric Oncology, 3584 CT Utrecht, Netherlands
| | - Norbert Hubner
- Cardiovascular and Metabolic Sciences, Max Delbrück Center for Molecular Medicine in the Helmholtz Association, 13125 Berlin, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Berlin, Germany.,Charité-Universitätsmedizin, 10117 Berlin, Germany.,Berlin Institute of Health, 10178 Berlin, Germany
| | - Wolfram H Zimmermann
- German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany.,Institute of Pharmacology and Toxicology, University Medical Center, 37075 Göttingen, Germany.,Cluster of Excellence "Multiscale Bioimaging: From Molecular Machines to Networks of Excitable Cells," University of Göttingen, 37073 Göttingen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Wolfgang A Linke
- Clinic for Cardiology and Pneumology, University Medical Center, 37075 Göttingen, Germany.,German Centre for Cardiovascular Research, 10785 Berlin, partner site Göttingen, Germany.,Institute of Physiology II, University of Münster, 48149 Münster, Germany
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14
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Fischer B, Dittmann S, Brodehl A, Unger A, Stallmeyer B, Paul M, Seebohm G, Kayser A, Peischard S, Linke WA, Milting H, Schulze-Bahr E. Functional characterization of novel alpha-helical rod domain desmin (DES) pathogenic variants associated with dilated cardiomyopathy, atrioventricular block and a risk for sudden cardiac death. Int J Cardiol 2020; 329:167-174. [PMID: 33373648 DOI: 10.1016/j.ijcard.2020.12.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 12/02/2020] [Accepted: 12/07/2020] [Indexed: 11/24/2022]
Abstract
BACKGROUND Desmin is the major intermediate filament (IF) protein in human heart and skeletal muscle. So-called 'desminopathies' are disorders due to pathogenic variants in the DES gene and are associated with skeletal myopathies and/or various types of cardiomyopathies. So far, only a limited number of DES pathogenic variants have been identified and functionally characterized. METHODS AND RESULTS Using a Sanger- and next generation sequencing (NGS) approach in patients with various types of cardiomyopathies, we identified two novel, non-synonymous missense DES variants: p.(Ile402Thr) and p.(Glu410Lys). Mutation carriers developed dilated (DCM) or arrhythmogenic cardiomyopathy (ACM), and cardiac conduction disease, leading to spare out the exercise-induced polymorphic ventricular tachycardia; we moved this variant to data in brief. To investigate the functional impact of these four DES variants, transfection experiments using SW-13 and H9c2 cells with native and mutant desmin were performed and filament assembly was analyzed by confocal microscopy. The DES_p.(Ile402Thr) and DES_p.(Glu410Lys) cells showed filament assembly defects forming cytoplasmic desmin aggregates. Furthermore, immunohistochemical and ultrastructural analysis of myocardial tissue from mutation carriers with the DES_p.(Glu410Lys) pathogenic variant supported the in vitro results. CONCLUSIONS Our in vitro results supported the classification of DES_p.(Ile402Thr) and DES_p.(Glu410Lys) as novel pathogenic variants and demonstrated that the cardiac phenotypes associated with DES variants are diverse and cell culture experiments improve in silico analysis and genetic counseling because the pathogenicity of a variant can be clarified.
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Affiliation(s)
- Björn Fischer
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Sven Dittmann
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany.
| | - Andreas Brodehl
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Muenster, Germany
| | - Birgit Stallmeyer
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Matthias Paul
- Department of Cardiology I, University Hospital Muenster, Muenster, Germany
| | - Guiscard Seebohm
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Anne Kayser
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | - Stefan Peischard
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
| | | | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Center NRW, University Hospital of the Ruhr-University Bochum, Bad Oeynhausen, Germany
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Disease (IfGH), Department of Cardiovascular Medicine, University Hospital Muenster, Muenster, Germany
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15
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Li Y, Hessel AL, Unger A, Ing D, Recker J, Koser F, Freundt JK, Linke WA. Graded titin cleavage progressively reduces tension and uncovers the source of A-band stability in contracting muscle. eLife 2020; 9:64107. [PMID: 33357376 PMCID: PMC7781594 DOI: 10.7554/elife.64107] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 12/23/2020] [Indexed: 12/11/2022] Open
Abstract
The giant muscle protein titin is a major contributor to passive force; however, its role in active force generation is unresolved. Here, we use a novel titin-cleavage (TC) mouse model that allows specific and rapid cutting of elastic titin to quantify how titin-based forces define myocyte ultrastructure and mechanics. We show that under mechanical strain, as TC doubles from heterozygous to homozygous TC muscles, Z-disks become increasingly out of register while passive and active forces are reduced. Interactions of elastic titin with sarcomeric actin filaments are revealed. Strikingly, when titin-cleaved muscles contract, myosin-containing A-bands become split and adjacent myosin filaments move in opposite directions while also shedding myosins. This establishes intact titin filaments as critical force-transmission networks, buffering the forces observed by myosin filaments during contraction. To perform this function, elastic titin must change stiffness or extensible length, unveiling its fundamental role as an activation-dependent spring in contracting muscle.
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Affiliation(s)
- Yong Li
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Anthony L Hessel
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - David Ing
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Jannik Recker
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Franziska Koser
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Johanna K Freundt
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Wolfgang A Linke
- Institute of Physiology II, University of Muenster, Muenster, Germany
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16
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Swist S, Unger A, Li Y, Vöge A, von Frieling-Salewsky M, Skärlén Å, Cacciani N, Braun T, Larsson L, Linke WA. Maintenance of sarcomeric integrity in adult muscle cells crucially depends on Z-disc anchored titin. Nat Commun 2020; 11:4479. [PMID: 32900999 PMCID: PMC7478974 DOI: 10.1038/s41467-020-18131-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 08/04/2020] [Indexed: 12/14/2022] Open
Abstract
The giant protein titin is thought to be required for sarcomeric integrity in mature myocytes, but direct evidence for this hypothesis is limited. Here, we describe a mouse model in which Z-disc-anchored TTN is depleted in adult skeletal muscles. Inactivation of TTN causes sarcomere disassembly and Z-disc deformations, force impairment, myocyte de-stiffening, upregulation of TTN-binding mechanosensitive proteins and activation of protein quality-control pathways, concomitant with preferential loss of thick-filament proteins. Interestingly, expression of the myosin-bound Cronos-isoform of TTN, generated from an alternative promoter not affected by the targeting strategy, does not prevent deterioration of sarcomere formation and maintenance. Finally, we demonstrate that loss of Z-disc-anchored TTN recapitulates muscle remodeling in critical illness ‘myosinopathy’ patients, characterized by TTN-depletion and loss of thick filaments. We conclude that full-length TTN is required to integrate Z-disc and A-band proteins into the mature sarcomere, a function that is lost when TTN expression is pathologically lowered. Titin is considered an integrator of muscle cell proteins but direct evidence is limited. Here, titin is inactivated in adult mouse muscles, which causes sarcomere disassembly, protein mis-expression and force impairment, recapitulating key alterations in critical illness myopathy patient muscles.
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Affiliation(s)
- Sandra Swist
- Department of Systems Physiology, Ruhr University Bochum, D-44780, Bochum, Germany.
| | - Andreas Unger
- Institute of Physiology II, University of Munster, D-48149, Munster, Germany
| | - Yong Li
- Institute of Physiology II, University of Munster, D-48149, Munster, Germany
| | - Anja Vöge
- Department of Systems Physiology, Ruhr University Bochum, D-44780, Bochum, Germany
| | | | - Åsa Skärlén
- Department of Clinical Neuroscience, Clinical Neurophysiology, Karolinska Institute, SE-171 77, Stockholm, Sweden
| | - Nicola Cacciani
- Department of Physiology and Pharmacology, Karolinska Institute, SE-171 77, Stockholm, Sweden
| | - Thomas Braun
- Department of Cardiac Development and Remodeling, Max Planck Institute for Heart and Lung Research, D-61231, Bad Nauheim, Germany
| | - Lars Larsson
- Department of Physiology and Pharmacology, Karolinska Institute, SE-171 77, Stockholm, Sweden
| | - Wolfgang A Linke
- Institute of Physiology II, University of Munster, D-48149, Munster, Germany.
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17
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Schuld J, Orfanos Z, Chevessier F, Eggers B, Heil L, Uszkoreit J, Unger A, Kirfel G, van der Ven PFM, Marcus K, Linke WA, Clemen CS, Schröder R, Fürst DO. Homozygous expression of the myofibrillar myopathy-associated p.W2710X filamin C variant reveals major pathomechanisms of sarcomeric lesion formation. Acta Neuropathol Commun 2020; 8:154. [PMID: 32887649 PMCID: PMC7650280 DOI: 10.1186/s40478-020-01001-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/22/2020] [Indexed: 01/06/2023] Open
Abstract
Filamin C (FLNc) is mainly expressed in striated muscle cells where it localizes to Z-discs, myotendinous junctions and intercalated discs. Recent studies have revealed numerous mutations in the FLNC gene causing familial and sporadic myopathies and cardiomyopathies with marked clinical variability. The most frequent myopathic mutation, p.W2710X, which is associated with myofibrillar myopathy, deletes the carboxy-terminal 16 amino acids from FLNc and abolishes the dimerization property of Ig-like domain 24. We previously characterized "knock-in" mice heterozygous for this mutation (p.W2711X), and have now investigated homozygous mice using protein and mRNA expression analyses, mass spectrometry, and extensive immunolocalization and ultrastructural studies. Although the latter mice display a relatively mild myopathy under normal conditions, our analyses identified major mechanisms causing the pathophysiology of this disease: in comparison to wildtype animals (i) the expression level of FLNc protein is drastically reduced; (ii) mutant FLNc is relocalized from Z-discs to particularly mechanically strained parts of muscle cells, i.e. myotendinous junctions and myofibrillar lesions; (iii) the number of lesions is greatly increased and these lesions lack Bcl2-associated athanogene 3 (BAG3) protein; (iv) the expression of heat shock protein beta-7 (HSPB7) is almost completely abolished. These findings indicate grave disturbances of BAG3-dependent and -independent autophagy pathways that are required for efficient lesion repair. In addition, our studies reveal general mechanisms of lesion formation and demonstrate that defective FLNc dimerization via its carboxy-terminal domain does not disturb assembly and basic function of myofibrils. An alternative, more amino-terminally located dimerization site might compensate for that loss. Since filamins function as stress sensors, our data further substantiate that FLNc is important for mechanosensing in the context of Z-disc stabilization and maintenance.
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18
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Rivas-Pardo JA, Li Y, Mártonfalvi Z, Tapia-Rojo R, Unger A, Fernández-Trasancos Á, Herrero-Galán E, Velázquez-Carreras D, Fernández JM, Linke WA, Alegre-Cebollada J. A HaloTag-TEV genetic cassette for mechanical phenotyping of proteins from tissues. Nat Commun 2020; 11:2060. [PMID: 32345978 PMCID: PMC7189229 DOI: 10.1038/s41467-020-15465-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2019] [Accepted: 03/09/2020] [Indexed: 11/09/2022] Open
Abstract
Single-molecule methods using recombinant proteins have generated transformative hypotheses on how mechanical forces are generated and sensed in biological tissues. However, testing these mechanical hypotheses on proteins in their natural environment remains inaccesible to conventional tools. To address this limitation, here we demonstrate a mouse model carrying a HaloTag-TEV insertion in the protein titin, the main determinant of myocyte stiffness. Using our system, we specifically sever titin by digestion with TEV protease, and find that the response of muscle fibers to length changes requires mechanical transduction through titin's intact polypeptide chain. In addition, HaloTag-based covalent tethering enables examination of titin dynamics under force using magnetic tweezers. At pulling forces < 10 pN, titin domains are recruited to the unfolded state, and produce 41.5 zJ mechanical work during refolding. Insertion of the HaloTag-TEV cassette in mechanical proteins opens opportunities to explore the molecular basis of cellular force generation, mechanosensing and mechanotransduction.
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Affiliation(s)
- Jaime Andrés Rivas-Pardo
- Department of Biological Sciences, Columbia University, New York, NY, 10027, USA
- Center for Genomics and Bioinformatics, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Yong Li
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | - Zsolt Mártonfalvi
- Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
| | - Rafael Tapia-Rojo
- Department of Biological Sciences, Columbia University, New York, NY, 10027, USA
| | - Andreas Unger
- Institute of Physiology II, University of Muenster, Muenster, Germany
| | | | | | | | - Julio M Fernández
- Department of Biological Sciences, Columbia University, New York, NY, 10027, USA
| | - Wolfgang A Linke
- Institute of Physiology II, University of Muenster, Muenster, Germany.
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19
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Kuntze A, Goetsch O, Fels B, Najder K, Unger A, Wilhelmi M, Sargin S, Schimmelpfennig S, Neumann I, Schwab A, Pethő Z. Protonation of Piezo1 Impairs Cell-Matrix Interactions of Pancreatic Stellate Cells. Front Physiol 2020; 11:89. [PMID: 32116794 PMCID: PMC7033545 DOI: 10.3389/fphys.2020.00089] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 01/27/2020] [Indexed: 12/12/2022] Open
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is characterized by an acidic and fibrotic stroma. The extracellular matrix (ECM) causing the fibrosis is primarily formed by pancreatic stellate cells (PSCs). The effects of the altered biomechanics and pH landscape in the pathogenesis of PDAC, however, are poorly understood. Mechanotransduction in cells has been linked to the function of mechanosensitive ion channels such as Piezo1. Here, we tested whether this channel plays crucial roles in transducing mechanical signals in the acidic PDAC microenvironment. We performed immunofluorescence, Ca2+ influx and intracellular pH measurements in PSCs and complemented them by live-cell imaging migration experiments in order to assess the function of Piezo1 channels in PSCs. We evaluated whether Piezo1 responds to changes of extracellular and/or intracellular pH in the pathophysiological range (pH 6.6 and pH 6.9, respectively). We validated our results using Piezo1-transfected HEK293 cells as a model system. Indeed, acidification of the intracellular space severely inhibits Piezo1-mediated Ca2+ influx into PSCs. In addition, stimulation of Piezo1 channels with its activator Yoda1 accelerates migration of PSCs on a two-dimensional ECM as well as in a 3D setting. Furthermore, Yoda1-activated PSCs transmit more force to the surrounding ECM under physiological pH, as revealed by measuring the dislocation of microbeads embedded in the surrounding matrix. This is paralleled by an enhanced phosphorylation of myosin light chain isoform 9 after Piezo1 stimulation. Intriguingly, upon acidification, Piezo1 activation leads to the initiation of cell death and disruption of PSC spheroids. In summary, stimulating Piezo1 activates PSCs by inducing Ca2+ influx which in turn alters the cytoskeletal architecture. This results in increased cellular motility and ECM traction, which can be useful for the cells to invade the surroundings and to detach from the tissue. However, in the presence of an acidic extracellular pH, although net Ca2+ influx is reduced, Piezo1 activation leads to severe cell stress also limiting cellular viability. In conclusion, our results indicate a strong interdependence between environmental pH, the mechanical output of PSCs and stromal mechanics, which promotes early local invasion of PDAC cells.
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Affiliation(s)
- Anna Kuntze
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Ole Goetsch
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Benedikt Fels
- Institute of Physiology, University of Lübeck, Lübeck, Germany
| | - Karolina Najder
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | - Sarah Sargin
- Institute of Physiology II, University of Münster, Münster, Germany
| | | | - Ilka Neumann
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Albrecht Schwab
- Institute of Physiology II, University of Münster, Münster, Germany
| | - Zoltan Pethő
- Institute of Physiology II, University of Münster, Münster, Germany
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20
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Schuld J, Orfanos Z, Chevessier F, Unger A, Kirfel G, van der Ven P, Linke W, Clemen C, Fürst D, Schröder R. P.78Sarcomeric pathology induced by homozygous expression of the myofibrillar myopathy - associated p.W2711X filamin C mutant. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.107] [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: 10/25/2022]
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21
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Clemen C, Winter L, Unger A, Berwanger C, Spörrer M, Linke W, Schröder R. P.80Imbalances in protein homeostasis caused by mutant desmin. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.109] [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: 10/25/2022]
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22
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Graf-Riesen K, Kimura K, Unger A, Lother A, Hein L, Daerr J, Braune J, Ooms A, Li G, Wu SM, Höhfeld J, Linke WA, Fürst D, Fleischmann BK, Hesse M. Abstract 466: Myopathy Causing Bag3
P209L
Protein Leads to Restrictive Cardiomyopathy Caused by Aggregate Formation and Sarcomere Disruption in Cardiomyocytes. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.466] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The co-chaperone BAG3 (Bcl-2 associated athanogene 3) is strongly expressed in cross-striated muscles and plays a key role in the turnover of muscle-proteins as a member of the CASA (chaperone-assisted selected autophagy) complex. An amino acid exchange (P209L) in the human BAG3 gene, caused by a single base mutation, gives rise to a severe dominant childhood muscular dystrophy, restrictive cardiomyopathy, and respiratory insufficiency. To get deeper insights into the pathophysiological mechanisms of the disease, we generated a transgenic mouse model of the human mutation BAG3
P209L
, in which a fusion protein consisting of the human BAG3
P209L
and the green fluorescent protein eGFP can be conditionally overexpressed. Ubiquitous overexpression of BAG3
P209L
-eGFP leads to a severe phenotype between the second and fourth week of life, including decreased body weight, skeletal muscle weakness, and heart failure. Echocardiography revealed that the BAG3
P209L
-mice suffer from restrictive cardiomyopathy and Sirius-red-staining of heart tissue showed extensive fibrosis. In cardiomyocytes, isolated from hearts of transgenic mice overexpressing BAG3
wt
-eGFP or BAG3
P209L
-eGFP, BAG3
wt
-eGFP stringently localizes to sarcomeres and intercalated discs, whereas cardiomyocytes from BAG3
P209L
-eGFP mice displayed formation of BAG3 containing aggregates and disruption of sarcomeres in
vivo
. While BAG3
P209L
-eGFP binding to á-Hsp70, Filamin C and á-HspB8 was unchanged it was less soluble than BAG3 and had a tendency to aggregate, thereby sequestering BAG3 and its clients. Depletion of the BAG3 pool leads to an impairment of CASA and accumulation of damaged proteins, causing sarcomere disintegration leading to restrictive cardiomyopathy.
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Affiliation(s)
| | | | | | - Achim Lother
- Institute of Experimental and Clinical Pharmacology and Toxicology, Freiburg, Germany
| | - Lutz Hein
- Institute of Experimental and Clinical Pharmacology and Toxicology, Freiburg, Germany
| | - Jan Daerr
- Institute of Cell Biology, Bonn, Germany
| | | | | | - Guang Li
- Stanford Cardiovascular Institute, Stanford, Germany
| | - Sean M. Wu
- Stanford Cardiovascular Institute, Stanford, Germany
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23
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Frank D, Rangrez AY, Friedrich C, Dittmann S, Stallmeyer B, Yadav P, Bernt A, Schulze-Bahr E, Borlepawar A, Zimmermann WH, Peischard S, Seebohm G, Linke WA, Baba HA, Krüger M, Unger A, Usinger P, Frey N, Schulze-Bahr E. Cardiac α-Actin (
ACTC1
) Gene Mutation Causes Atrial-Septal Defects Associated With Late-Onset Dilated Cardiomyopathy. Circ: Genomic and Precision Medicine 2019; 12:e002491. [DOI: 10.1161/circgen.119.002491] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background:
Familial atrial septal defect (ASD) has previously been attributed primarily to mutations in cardiac transcription factors. Here, we report a large, multi-generational family (78 members) with ASD combined with a late-onset dilated cardiomyopathy and further characterize the consequences of mutant α-actin.
Methods:
We combined a genome-wide linkage analysis with cell biology, microscopy, and molecular biology tools to characterize a novel
ACTC1
(cardiac α-actin) mutation identified in association with ASD and late-onset dilated cardiomyopathy in a large, multi-generational family.
Results:
Using a genome-wide linkage analysis, the ASD disease locus was mapped to chromosome 15q14 harboring the
ACTC1
gene. In 15 affected family members, a heterozygous, nonsynonymous, and fully penetrant mutation (p. Gly247Asp) was identified in exon 5 of
ACTC1
that was absent in all healthy family members (n=63). In silico tools predicted deleterious consequences of this variant that was found absent in control databases. Ultrastructural analysis of myocardial tissue of one of the mutation carriers showed sarcomeric disarray, myofibrillar degeneration, and increased apoptosis, while cardiac proteomics revealed a significant increase in extracellular matrix proteins. Consistently, structural defects and increased apoptosis were also observed in neonatal rat ventricular cardiomyocytes overexpressing the mutant, but not native human ACTC1. Molecular dynamics studies and additional mechanistic analyses in cardiomyocytes confirmed actin polymerization/turnover defects, thereby affecting contractility.
Conclusions:
A combined phenotype of ASD and late-onset heart failure was caused by a heterozygous, nonsynonymous ACTC1 mutation. Mechanistically, we found a shared molecular mechanism of defective actin signaling and polymerization in both cardiac development and contractile function. Detection of ACTC1 mutations in patients with ASD may thus have further clinical implications with regard to monitoring for (late-onset) dilated cardiomyopathy.
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Affiliation(s)
- Derk Frank
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel (D.F., A.Y.R., A. Bernt, A. Borlepawar, P.U., N.F.)
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Ashraf Yusuf Rangrez
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel (D.F., A.Y.R., A. Bernt, A. Borlepawar, P.U., N.F.)
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Corinna Friedrich
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
- Institute for Human Genetics (C.F), University Hospital Münster
| | - Sven Dittmann
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
| | - Birgit Stallmeyer
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
| | - Pankaj Yadav
- Division of Molecular Genetic Epidemiology, German Cancer Research Center (DKFZ), Heidelberg (P.Y.)
| | - Alexander Bernt
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel (D.F., A.Y.R., A. Bernt, A. Borlepawar, P.U., N.F.)
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Ellen Schulze-Bahr
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
| | - Ankush Borlepawar
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel (D.F., A.Y.R., A. Bernt, A. Borlepawar, P.U., N.F.)
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Wolfram-Hubertus Zimmermann
- Institute of Pharmacology and Toxicology, University Medical Center Göttingen (W.H.-Z.)
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Stefan Peischard
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
| | - Guiscard Seebohm
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
| | - Wolfgang A. Linke
- Institute of Physiology II (W.A.L.), University Hospital Münster
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Hideo A. Baba
- Institute of Pathology, University of Duisburg-Essen (H.A.B.)
| | - Marcus Krüger
- Center for Molecular Medicine Cologne (CMMC), Proteomics Facility, University of Cologne (M.K.)
| | - Andreas Unger
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
| | - Philip Usinger
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel (D.F., A.Y.R., A. Bernt, A. Borlepawar, P.U., N.F.)
| | - Norbert Frey
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel (D.F., A.Y.R., A. Bernt, A. Borlepawar, P.U., N.F.)
- Co-affiliated with DZHK (German Centre for Cardiovascular Research), sites Hamburg/Kiel/Lübeck and Göttingen, Germany (D.F., A.Y.R., A. Bernt, A. Borlepawar, W.H.-Z., W.A.L., N.F.)
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine (C.F., S.D., B.S., Ellen Schulze-Bahr, S.P., G.S., A.U., Eric Schulze-Bahr), University Hospital Münster
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Horsthemke M, Nutter LMJ, Bachg AC, Skryabin BV, Honnert U, Zobel T, Bogdan S, Stoll M, Seidl MD, Müller FU, Ravens U, Unger A, Linke WA, van Gorp PRR, de Vries AAF, Bähler M, Hanley PJ. A novel isoform of myosin 18A (Myo18Aγ) is an essential sarcomeric protein in mouse heart. J Biol Chem 2019; 294:7202-7218. [PMID: 30737279 DOI: 10.1074/jbc.ra118.004560] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 01/19/2019] [Indexed: 01/19/2023] Open
Abstract
Whereas myosin 18B (Myo18B) is known to be a critical sarcomeric protein, the function of myosin 18A (Myo18A) is unclear, although it has been implicated in cell motility and Golgi shape. Here, we show that homozygous deletion (homozygous tm1a, tm1b, or tm1d alleles) of Myo18a in mouse is embryonic lethal. Reminiscent of Myo18b, Myo18a was highly expressed in the embryo heart, and cardiac-restricted Myo18a deletion in mice was embryonic lethal. Surprisingly, using Western blot analysis, we were unable to detect the known isoforms of Myo18A, Myo18Aα and Myo18Aβ, in mouse heart using a custom C-terminal antibody. However, alternative anti-Myo18A antibodies detected a larger than expected protein, and RNA-Seq analysis indicated that a novel Myo18A transcript is expressed in mouse ventricular myocytes (and human heart). Cloning and sequencing revealed that this cardiac isoform, denoted Myo18Aγ, lacks the PDZ-containing N terminus of Myo18Aα but includes an alternative N-terminal extension and a long serine-rich C terminus. EGFP-tagged Myo18Aγ expressed in ventricular myocytes localized to the level of A-bands in sarcomeres, and Myo18a knockout embryos at day 10.5 exhibited disorganized sarcomeres with wavy thick filaments. We additionally generated myeloid-restricted Myo18a knockout mice to investigate the role of Myo18A in nonmuscle cells, exemplified by macrophages, which express more Myo18Aβ than Myo18Aα, but no defects in cell shape, motility, or Golgi shape were detected. In summary, we have identified a previously unrecognized sarcomere component, a large novel isoform (denoted Myo18Aγ) of Myo18A. Thus, both members of class XVIII myosins are critical components of cardiac sarcomeres.
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Affiliation(s)
| | - Lauryl M J Nutter
- the Centre for Phenogenomics, Hospital for Sick Children, Toronto, Ontario M5T 3H7, Canada
| | | | - Boris V Skryabin
- Department of Medicine, Transgenic Animal and Genetic Engineering Models (TRAM)
| | | | - Thomas Zobel
- the Center for Advanced Imaging, Heinrich Heine Universität Düsseldorf, 40225 Düsseldorf, Germany
| | - Sven Bogdan
- the Institut für Physiologie und Pathophysiologie, Abteilung Molekulare Zellphysiologie, Philipps-Universität Marburg, 35037 Marburg, Germany
| | | | - Matthias D Seidl
- Institut für Pharmakologie und Toxikologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Frank U Müller
- Institut für Pharmakologie und Toxikologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Ursula Ravens
- the Institut für Experimentelle Kardiovaskuläre Medizin, Universitätsklinikum Freiburg, 79110 Freiburg, Germany
| | - Andreas Unger
- the Institut für Physiologie II, Westfälische Wilhelms-Universität Münster, Robert-Koch-Strasse 27b, 48149 Münster, Germany, and
| | - Wolfgang A Linke
- the Institut für Physiologie II, Westfälische Wilhelms-Universität Münster, Robert-Koch-Strasse 27b, 48149 Münster, Germany, and
| | - Pim R R van Gorp
- the Laboratory of Experimental Cardiology, Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2300 RC Leiden, The Netherlands
| | - Antoine A F de Vries
- the Laboratory of Experimental Cardiology, Department of Cardiology, Leiden University Medical Center, Albinusdreef 2, 2300 RC Leiden, The Netherlands
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25
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Li Y, Unger A, von Frieling-Salewsky M, Rivas-Pardo A, Alegre-Cebollada J, Fernandez JM, Linke WA. Specific Cleavage of the Titin Springs In Situ Uncovers the Role of Titin-Based Force in Sarcomere Structure and Muscle Contraction. Biophys J 2019. [DOI: 10.1016/j.bpj.2018.11.2174] [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] Open
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26
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Visscher DR, Unger A, Grobbelaar H, DeWitt PD. Bird foraging is influenced by both risk and connectivity in urban parks. Journal of Urban Ecology 2018. [DOI: 10.1093/jue/juy020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- D R Visscher
- Department of Biology, The King's University, Edmonton, AB T6B 2H3, Canada
| | - A Unger
- Department of Biology, The King's University, Edmonton, AB T6B 2H3, Canada
| | - H Grobbelaar
- Department of Biology, The King's University, Edmonton, AB T6B 2H3, Canada
| | - P D DeWitt
- Science and Research Branch, Ontario Ministry of Natural Resources & Forestry, Peterborough, ON K9J 3C7, Canada
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27
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Winter L, Unger A, Berwanger C, Spörrer M, Türk M, Chevessier F, Strucksberg KH, Schlötzer-Schrehardt U, Wittig I, Goldmann WH, Marcus K, Linke WA, Clemen CS, Schröder R. Imbalances in protein homeostasis caused by mutant desmin. Neuropathol Appl Neurobiol 2018; 45:476-494. [PMID: 30179276 DOI: 10.1111/nan.12516] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 05/29/2018] [Accepted: 08/17/2018] [Indexed: 12/19/2022]
Abstract
AIMS We investigated newly generated immortalized heterozygous and homozygous R349P desmin knock-in myoblasts in conjunction with the corresponding desminopathy mice as models for desminopathies to analyse major protein quality control processes in response to the presence of R349P mutant desmin. METHODS We used hetero- and homozygous R349P desmin knock-in mice for analyses and for crossbreeding with p53 knock-out mice to generate immortalized R349P desmin knock-in skeletal muscle myoblasts and myotubes. Skeletal muscle sections and cultured muscle cells were investigated by indirect immunofluorescence microscopy, proteasomal activity measurements and immunoblotting addressing autophagy rate, chaperone-assisted selective autophagy and heat shock protein levels. Muscle sections were further analysed by transmission and immunogold electron microscopy. RESULTS We demonstrate that mutant desmin (i) increases proteasomal activity, (ii) stimulates macroautophagy, (iii) dysregulates the chaperone assisted selective autophagy and (iv) elevates the protein levels of αB-crystallin and Hsp27. Both αB-crystallin and Hsp27 as well as Hsp90 displayed translocation patterns from Z-discs as well as Z-I junctions, respectively, to the level of sarcomeric I-bands in dominant and recessive desminopathies. CONCLUSIONS Our findings demonstrate that the presence of R349P mutant desmin causes a general imbalance in skeletal muscle protein homeostasis via aberrant activity of all major protein quality control systems. The augmented activity of these systems and the subcellular shift of essential heat shock proteins may deleteriously contribute to the previously observed increased turnover of desmin itself and desmin-binding partners, which triggers progressive dysfunction of the extrasarcomeric cytoskeleton and the myofibrillar apparatus in the course of the development of desminopathies.
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Affiliation(s)
- L Winter
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany.,Neuromuscular Research Department, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - A Unger
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany.,Institute for Genetics of Heart Diseases, University Hospital Münster, Münster, Germany
| | - C Berwanger
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany.,Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | - M Spörrer
- Center for Medical Physics and Technology, Biophysics Group, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - M Türk
- Department of Neurology, University Hospital Erlangen, Erlangen, Germany
| | - F Chevessier
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany
| | - K-H Strucksberg
- Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | | | - I Wittig
- Functional Proteomics, SFB815 Core Unit, Medical School, Goethe University, Frankfurt, Germany
| | - W H Goldmann
- Center for Medical Physics and Technology, Biophysics Group, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - K Marcus
- Medizinisches Proteom-Center, Medical Faculty, Ruhr-University Bochum, Bochum, Germany
| | - W A Linke
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany.,Institute of Physiology II, University of Münster, Münster, Germany
| | - C S Clemen
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, Bochum, Germany.,Center for Biochemistry, Institute of Biochemistry I, Medical Faculty, University of Cologne, Cologne, Germany
| | - R Schröder
- Institute of Neuropathology, University Hospital Erlangen, Erlangen, Germany
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28
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Gruber M, Rumpold T, Schrank B, Sibitz I, Otzelberger B, Jahn R, Amering M, Unger A. Recover recovery style from psychosis: a psychometric evaluation of the German version of the Recovery Style Questionnaire (RSQ). Epidemiol Psychiatr Sci 2018; 29:e4. [PMID: 30203731 PMCID: PMC8061273 DOI: 10.1017/s2045796018000471] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/14/2018] [Accepted: 08/02/2018] [Indexed: 12/02/2022] Open
Abstract
AIMS The way an individual handles the experience of psychosis, the so-called 'recovery style', has been shown to substantially affect long-term outcomes. The Recovery Style Questionnaire (RSQ) measures this psychological dimension. The aim of this study was to provide a validation of the German version of the RSQ and to raise awareness for recovery-oriented approaches. METHODS The RSQ was translated into German according to the guidelines of the WHO and patients were administered this questionnaire and measures of internalised stigma, psychotic symptoms, illness concept, empowerment, self-esteem and quality of life. Descriptive statistics were demonstrated to characterise the sample. Reliability was assessed in different forms: internal consistency, test-retest reliability and split-half reliability. Items were evaluated with descriptive data and item-total correlations. Convergent and discriminant validity were shown, and a confirmatory factor analysis was performed. In order to ameliorate the model, a post hoc model modification was done. RESULTS The sample consisted of 138 patients diagnosed with schizophrenia spectrum disorders (mean age: 35.7 years; 53.6% men; mean duration of illness: 20.6 years) with a mean RSQ overall percentage of 66.12 (s.d. ± 17.43%), mainly representing the categories 'mixed picture' and 'tends towards integration'. The reliability of the RSQ was acceptable with a Cronbach's α of 0.741 and a test-retest coefficient of 0.502. Item-total correlations were not acceptable for 27 of 39 items. Moderate evidence for convergent validity of the RSQ was found. Confirmatory factor analysis revealed that the 13-factor model with 39 items originally proposed was partially poorly replicated in the present sample (χ2 ratio to degrees of freedom (χ2/df) of 1.732, Comparative Fit Index (CFI) of 0.585, Normed Fit Index (NFI) of 0.414, Tucker-Lewis Index (TLI) of 0.508, root mean square error of approximation (RMSEA) of 0.095). The RSQ was modified based on item-total correlations and path coefficients of the single items. The confirmatory factor analysis of the resulting one-factor model with 11 items showed adequate fit to the data (χ2/df of 1.562, CFI of 0.936, NFI of 0.847, TLI of 0.910, RMSEA of 0.083) and demonstrated good model fit. CONCLUSIONS Despite partially insufficient psychometric data of the original RSQ, the concept of recovery style is beneficial to psychiatric research and clinical practice. The underlying idea is valuable, and the questionnaire needs further development. Therefore, a short version of the RSQ is proposed.
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Affiliation(s)
- M. Gruber
- Division of Social Psychiatry, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
| | - T. Rumpold
- Division of Social Psychiatry, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
- Department of Radiation Oncology, Comprehensive Cancer Center Medical University of Vienna, Waehringer Straße 18-20, 1090 Vienna, Austria
| | - B. Schrank
- Department of Adult Psychiatry, Karl Landsteiner University of Health Sciences, University Clinic Tulln, Austria
| | | | | | - R. Jahn
- Division of Social Psychiatry, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
| | - M. Amering
- Division of Social Psychiatry, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
| | - A. Unger
- Division of Social Psychiatry, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
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29
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Li Y, Unger A, von Frieling-Salewsky M, Rivas Pardo JA, Fernandez JM, Linke WA. Quantifying the Titin Contribution to Muscle Force Generation using a Novel Method to Specifically Cleave the Titin Springs in Situ. Biophys J 2018. [DOI: 10.1016/j.bpj.2017.11.3480] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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30
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Unger A, Beckendorf L, Böhme P, Kley R, von Frieling-Salewsky M, Lochmüller H, Schröder R, Fürst DO, Vorgerd M, Linke WA. Translocation of molecular chaperones to the titin springs is common in skeletal myopathy patients and affects sarcomere function. Acta Neuropathol Commun 2017; 5:72. [PMID: 28915917 PMCID: PMC5603016 DOI: 10.1186/s40478-017-0474-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 09/09/2017] [Indexed: 12/16/2022] Open
Abstract
Myopathies encompass a wide variety of acquired and hereditary disorders. The pathomechanisms include structural and functional changes affecting, e.g., myofiber metabolism and contractile properties. In this study, we observed increased passive tension (PT) of skinned myofibers from patients with myofibrillar myopathy (MFM) caused by FLNC mutations (MFM-filaminopathy) and limb-girdle muscular dystrophy type-2A due to CAPN3 mutations (LGMD2A), compared to healthy control myofibers. Because the giant protein titin determines myofiber PT, we measured its molecular size and the titin-to-myosin ratio, but found no differences between myopathies and controls. All-titin phosphorylation and site-specific phosphorylation in the PEVK region were reduced in myopathy, which would be predicted to lower PT. Electron microscopy revealed extensive ultrastructural changes in myofibers of various hereditary myopathies and also suggested massive binding of proteins to the sarcomeric I-band region, presumably heat shock proteins (HSPs), which can translocate to elastic titin under stress conditions. Correlative immunofluorescence and immunoelectron microscopy showed that two small HSPs (HSP27 and αB-crystallin) and the ATP-dependent chaperone HSP90 translocated to the titin springs in myopathy. The small HSPs, but not HSP90, were upregulated in myopathic versus control muscles. The titin-binding pattern of chaperones was regularly observed in Duchenne muscular dystrophy (DMD), LGMD2A, MFM-filaminopathy, MFM-myotilinopathy, titinopathy, and inclusion body myopathy due to mutations in valosin-containing protein, but not in acquired sporadic inclusion body myositis. The three HSPs also associated with elastic titin in mouse models of DMD and MFM-filaminopathy. Mechanical measurements on skinned human myofibers incubated with exogenous small HSPs suggested that the elevated PT seen in myopathy is caused, in part, by chaperone-binding to the titin springs. Whereas this interaction may be protective in that it prevents sarcomeric protein aggregation, it also has detrimental effects on sarcomere function. Thus, we identified a novel pathological phenomenon common to many hereditary muscle disorders, which involves sarcomeric alterations.
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31
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Tiburcy M, Hudson JE, Balfanz P, Schlick S, Meyer T, Chang Liao ML, Levent E, Raad F, Zeidler S, Wingender E, Riegler J, Wang M, Gold JD, Kehat I, Wettwer E, Ravens U, Dierickx P, van Laake LW, Goumans MJ, Khadjeh S, Toischer K, Hasenfuss G, Couture LA, Unger A, Linke WA, Araki T, Neel B, Keller G, Gepstein L, Wu JC, Zimmermann WH. Defined Engineered Human Myocardium With Advanced Maturation for Applications in Heart Failure Modeling and Repair. Circulation 2017; 135:1832-1847. [PMID: 28167635 DOI: 10.1161/circulationaha.116.024145] [Citation(s) in RCA: 373] [Impact Index Per Article: 53.3] [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] [Received: 06/24/2016] [Accepted: 01/23/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND Advancing structural and functional maturation of stem cell-derived cardiomyocytes remains a key challenge for applications in disease modeling, drug screening, and heart repair. Here, we sought to advance cardiomyocyte maturation in engineered human myocardium (EHM) toward an adult phenotype under defined conditions. METHODS We systematically investigated cell composition, matrix, and media conditions to generate EHM from embryonic and induced pluripotent stem cell-derived cardiomyocytes and fibroblasts with organotypic functionality under serum-free conditions. We used morphological, functional, and transcriptome analyses to benchmark maturation of EHM. RESULTS EHM demonstrated important structural and functional properties of postnatal myocardium, including: (1) rod-shaped cardiomyocytes with M bands assembled as a functional syncytium; (2) systolic twitch forces at a similar level as observed in bona fide postnatal myocardium; (3) a positive force-frequency response; (4) inotropic responses to β-adrenergic stimulation mediated via canonical β1- and β2-adrenoceptor signaling pathways; and (5) evidence for advanced molecular maturation by transcriptome profiling. EHM responded to chronic catecholamine toxicity with contractile dysfunction, cardiomyocyte hypertrophy, cardiomyocyte death, and N-terminal pro B-type natriuretic peptide release; all are classical hallmarks of heart failure. In addition, we demonstrate the scalability of EHM according to anticipated clinical demands for cardiac repair. CONCLUSIONS We provide proof-of-concept for a universally applicable technology for the engineering of macroscale human myocardium for disease modeling and heart repair from embryonic and induced pluripotent stem cell-derived cardiomyocytes under defined, serum-free conditions.
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Affiliation(s)
- Malte Tiburcy
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - James E Hudson
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Paul Balfanz
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Susanne Schlick
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Tim Meyer
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Mei-Ling Chang Liao
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Elif Levent
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Farah Raad
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Sebastian Zeidler
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Edgar Wingender
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Johannes Riegler
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Mouer Wang
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Joseph D Gold
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Izhak Kehat
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Erich Wettwer
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Ursula Ravens
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Pieterjan Dierickx
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Linda W van Laake
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Marie Jose Goumans
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Sara Khadjeh
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Karl Toischer
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Gerd Hasenfuss
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Larry A Couture
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Andreas Unger
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Wolfgang A Linke
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Toshiyuki Araki
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Benjamin Neel
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Gordon Keller
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Lior Gepstein
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Joseph C Wu
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia
| | - Wolfram-Hubertus Zimmermann
- From Institute of Pharmacology and Toxicology, University Medical Center Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wettwer, W.-H.Z.); German Center for Cardiovascular Research (DZHK), partner site Göttingen, Germany (M.T., J.E.H., P.B., S.S., T.M., M.-L.C.L., E.L., F.R., S.Z., E. Wingender, W.A.L., W.-H.Z.); Institute of Bioinformatics, University Medical Center Göttingen, Germany (S.Z., E. Wingender); Stanford Cardiovascular Institute (J.R., M.W., J.D.G., J.C.W.) and Department of Radiology (J.D.G., J.C.W.), Molecular Imaging Program, Stanford University School of Medicine, CA; The Sohnis Laboratory for Cardiac Electrophysiology and Regenerative Medicine, Technion-Israel Institute of Technology, Haifa (I.K., L.G.); Institute of Pharmacology and Toxicology, Technical University Dresden, Germany (E. Wettwer, U.R.); University Medical Center Utrecht and Hubrecht Institute, The Netherlands (P.D., L.W.v.L.); Leiden University Medical Center, The Netherlands (M.J.G.); Clinic for Cardiology and Pneumology, University Medical Center Göttingen, Germany (S.K., K.T., G.H., W.A.L.); Center for Applied Technology, Beckman Research Institute, City of Hope, Duarte, CA (L.A.C.); Department of Cardiovascular Physiology, Institute of Physiology, Ruhr University Bochum, Bochum, Germany (A.U., W.A.L.); New Laura and Isaac Perlmutter Cancer Center at New York University Langone (T.A., B.N.); and McEwen Centre for Regenerative Medicine, Toronto, Canada (G.K.). The current address for Dr Hudson is Laboratory for Cardiac Regeneration, School of Biomedical Sciences, The University of Queensland, Australia.
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Unger A, Dekomien G, Güttsches A, Dreps T, Kley R, Tegenthoff M, Ferbert A, Weis J, Heyer C, Linke WA, Martinez-Carrera L, Storbeck M, Wirth B, Hoffjan S, Vorgerd M. Expanding the phenotype of
BICD2
mutations toward skeletal muscle involvement. Neurology 2016; 87:2235-2243. [DOI: 10.1212/wnl.0000000000003360] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 08/12/2016] [Indexed: 11/15/2022] Open
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Witte U, Schneider F, Traub M, Hoffmann D, Drovs S, Brand T, Unger A. kW-class direct diode laser for sheet metal cutting based on DWDM of pump modules by use of ultra-steep dielectric filters. Opt Express 2016; 24:22917-22929. [PMID: 27828359 DOI: 10.1364/oe.24.022917] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A direct diode laser was built with > 800 W output power at 940 nm to 980 nm. The radiation is coupled into a 100 µm fiber and the NA ex fiber is 0.17. The laser system is based on pump modules that are wavelength stabilized by VBGs. Dense and coarse wavelength multiplexing are realized with commercially available ultra-steep dielectric filters. The electro-optical efficiency is above 30%. Based on a detailed analysis of losses, an improved e-o-efficiency in the range of 40% to 45% is expected in the near future. System performance and reliability were demonstrated with sheet metal cutting tests on stainless steel with a thickness of 4.2 mm.
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Lang AE, Qu Z, Schwan C, Silvan U, Unger A, Schoenenberger CA, Aktories K, Mannherz HG. Actin ADP-ribosylation at Threonine148 by Photorhabdus luminescens toxin TccC3 induces aggregation of intracellular F-actin. Cell Microbiol 2016; 19. [PMID: 27341322 DOI: 10.1111/cmi.12636] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 06/10/2016] [Accepted: 06/18/2016] [Indexed: 02/03/2023]
Abstract
Intoxication of eukaryotic cells by Photorhabdus luminescens toxin TccC3 induces cell rounding and detachment from the substratum within a few hours and compromises a number of cell functions like phagocytosis. Here, we used morphological and biochemical procedures to analyse the mechanism of TccC3 intoxication. Life imaging of TccC3-intoxicated HeLa cells transfected with AcGFP-actin shows condensation of F-actin into large aggregates. Life cell total internal reflection fluorescence (TIRF) microscopy of identically treated HeLa cells confirmed the formation of actin aggregates but also disassembly of F-actin stress fibres. Recombinant TccC3 toxin ADP-ribosylates purified skeletal and non-muscle actin at threonine148 leading to a strong propensity to polymerize and F-actin bundle formation as shown by TIRF and electron microscopy. Native gel electrophoresis shows strongly reduced binding of Thr148-ADP-ribosylated actin to the severing proteins gelsolin and its fragments G1 and G1-3, and to ADF/cofilin. Complexation of actin with these proteins inhibits its ADP-ribosylation. TIRF microscopy demonstrates rapid polymerization of Thr148-ADP-ribosylated actin to curled F-actin bundles even in the presence of thymosin β4, gelsolin or G1-3. Thr148-ADP-ribosylated F-actin cannot be depolymerized by gelsolin or G1-3 as verified by TIRF, co-sedimentation and electron microscopy and shows reduced treadmilling as indicated by a lack of stimulation of its ATPase activity after addition of cofilin-1.
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Affiliation(s)
- Alexander E Lang
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
| | - Zheng Qu
- Abteilung für Anatomie und Molekulare Embryologie, Ruhr-Universität Bochum, Bochum, Germany
| | - Carsten Schwan
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
| | - Unai Silvan
- ETH Zürich, Institute for Biomechanics, University of Zürich, Balgrist Campus, Zürich, Switzerland
| | - Andreas Unger
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany
| | | | - Klaus Aktories
- Institut für Experimentelle und Klinische Pharmakologie und Toxikologie, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany.,Centre for Biological Signalling Studies (BIOSS), University of Freiburg, Freiburg, Germany.,Freiburg Institute of Advanced Studies (FRIAS), University of Freiburg, Freiburg, Germany
| | - Hans Georg Mannherz
- Abteilung für Anatomie und Molekulare Embryologie, Ruhr-Universität Bochum, Bochum, Germany
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Booker SA, Althof D, Gross A, Loreth D, Müller J, Unger A, Fakler B, Varro A, Watanabe M, Gassmann M, Bettler B, Shigemoto R, Vida I, Kulik Á. KCTD12 Auxiliary Proteins Modulate Kinetics of GABABReceptor-Mediated Inhibition in Cholecystokinin-Containing Interneurons. Cereb Cortex 2016; 27:2318-2334. [DOI: 10.1093/cercor/bhw090] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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36
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Krysiak J, Unger A, Hamdani N, Boknik P, Linke WA. A Novel Role for PP5 in Regulating Titin Phosphorylation and Function in the Heart. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.1607] [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] Open
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37
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Rolland C, Barthélémy L, Jébrak G, Hamouti L, Unger A. « Asthme au quotidien, asthme en questions ». Regards croisés entre patients et professionnels de santé. Rev Mal Respir 2016. [DOI: 10.1016/j.rmr.2015.10.067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Franssen C, Chen S, Unger A, Korkmaz HI, De Keulenaer GW, Tschöpe C, Leite-Moreira AF, Musters R, Niessen HWM, Linke WA, Paulus WJ, Hamdani N. Myocardial Microvascular Inflammatory Endothelial Activation in Heart Failure With Preserved Ejection Fraction. JACC Heart Fail 2015; 4:312-24. [PMID: 26682792 DOI: 10.1016/j.jchf.2015.10.007] [Citation(s) in RCA: 335] [Impact Index Per Article: 37.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/21/2015] [Accepted: 10/01/2015] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The present study investigated whether systemic, low-grade inflammation of metabolic risk contributed to diastolic left ventricular (LV) dysfunction and heart failure with preseved ejection fraction (HFpEF) through coronary microvascular endothelial activation, which alters paracrine signalling to cardiomyocytes and predisposes them to hypertrophy and high diastolic stiffness. BACKGROUND Metabolic risk is associated with diastolic LV dysfunction and HFpEF. METHODS We explored inflammatory endothelial activation and its effects on oxidative stress, nitric oxide (NO) bioavailability, and cyclic guanosine monophosphate (cGMP)-protein kinase G (PKG) signalling in myocardial biopsies of HFpEF patients and validated our findings by comparing obese Zucker diabetic fatty/Spontaneously hypertensive heart failure F1 hybrid (ZSF1)-HFpEF rats to ZSF1-Control (Ctrl) rats. RESULTS In myocardium of HFpEF patients and ZSF1-HFpEF rats, we observed the following: 1) E-selectin and intercellular adhesion molecule-1 expression levels were upregulated; 2) NADPH oxidase 2 expression was raised in macrophages and endothelial cells but not in cardiomyocytes; and 3) uncoupling of endothelial nitric oxide synthase, which was associated with reduced myocardial nitrite/nitrate concentration, cGMP content, and PKG activity. CONCLUSIONS HFpEF is associated with coronary microvascular endothelial activation and oxidative stress. These lead to a reduction of NO-dependent signalling from endothelial cells to cardiomyocytes, which can contribute to the high cardiomyocyte stiffness and hypertrophy observed in HFpEF.
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Affiliation(s)
- Constantijn Franssen
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands
| | - Sophia Chen
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands
| | - Andreas Unger
- Department of Cardiovascular Physiology, Ruhr University Bochum, Bochum, Germany
| | - H Ibrahim Korkmaz
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands; Department of Pathology and Cardiac Surgery, VU University Medical Center, Amsterdam, the Netherlands
| | | | - Carsten Tschöpe
- Department of Cardiology and Pneumology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | - René Musters
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands
| | - Hans W M Niessen
- Department of Pathology and Cardiac Surgery, VU University Medical Center, Amsterdam, the Netherlands
| | - Wolfgang A Linke
- Department of Cardiovascular Physiology, Ruhr University Bochum, Bochum, Germany
| | - Walter J Paulus
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands.
| | - Nazha Hamdani
- Department of Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, the Netherlands; Department of Cardiovascular Physiology, Ruhr University Bochum, Bochum, Germany
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Chevessier F, Schuld J, Orfanos Z, Plank AC, Wolf L, Maerkens A, Unger A, Schlötzer-Schrehardt U, Kley RA, Von Hörsten S, Marcus K, Linke WA, Vorgerd M, van der Ven PFM, Fürst DO, Schröder R. Myofibrillar instability exacerbated by acute exercise in filaminopathy. Hum Mol Genet 2015; 24:7207-20. [PMID: 26472074 DOI: 10.1093/hmg/ddv421] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/02/2015] [Indexed: 12/12/2022] Open
Abstract
Filamin C (FLNC) mutations in humans cause myofibrillar myopathy (MFM) and cardiomyopathy, characterized by protein aggregation and myofibrillar degeneration. We generated the first patient-mimicking knock-in mouse harbouring the most common disease-causing filamin C mutation (p.W2710X). These heterozygous mice developed muscle weakness and myofibrillar instability, with formation of filamin C- and Xin-positive lesions streaming between Z-discs. These lesions, which are distinct from the classical MFM protein aggregates by their morphology and filamentous appearance, were greatly increased in number upon acute physical exercise in the mice. This pathology suggests that mutant filamin influences the mechanical stability of myofibrillar Z-discs, explaining the muscle weakness in mice and humans. Re-evaluation of biopsies from MFM-filaminopathy patients with different FLNC mutations revealed a similar, previously unreported lesion pathology, in addition to the classical protein aggregates, and suggested that structures previously interpreted as aggregates may be in part sarcomeric lesions. We postulate that these lesions define preclinical disease stages, preceding the formation of protein aggregates.
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Affiliation(s)
| | - Julia Schuld
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Zacharias Orfanos
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Anne-C Plank
- Department for Experimental Therapy, Preclinical Experimental Animal Center and
| | | | - Alexandra Maerkens
- Department of Neurology, Neuromuscular Center Ruhrgebiet, University Hospital Bergmannsheil, Department of Functional Proteomics, Medizinisches Proteom-Center and
| | - Andreas Unger
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany
| | | | - Rudolf A Kley
- Department of Neurology, Neuromuscular Center Ruhrgebiet, University Hospital Bergmannsheil
| | - Stephan Von Hörsten
- Department for Experimental Therapy, Preclinical Experimental Animal Center and
| | - Katrin Marcus
- Department of Functional Proteomics, Medizinisches Proteom-Center and
| | - Wolfgang A Linke
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany
| | - Matthias Vorgerd
- Department of Neurology, Neuromuscular Center Ruhrgebiet, University Hospital Bergmannsheil
| | - Peter F M van der Ven
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Dieter O Fürst
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany,
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Leonhäuser B, Kissel H, Tomm JW, Hempel M, Unger A, Biesenbach J. High-power diode lasers under external optical feedback. ACTA ACUST UNITED AC 2015. [DOI: 10.1117/12.2079116] [Citation(s) in RCA: 7] [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: 11/14/2022]
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41
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Brandt L, Unger A, Moser L, Fischer G, Jagsch R. Limitations to Participation in Opioid Maintenance Treatment in Europe. Eur Psychiatry 2015. [DOI: 10.1016/s0924-9338(15)30403-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Herum KM, Lunde IG, Skrbic B, Louch WE, Hasic A, Boye S, Unger A, Brorson SH, Sjaastad I, Tønnessen T, Linke WA, Gomez MF, Christensen G. Syndecan-4 is a key determinant of collagen cross-linking and passive myocardial stiffness in the pressure-overloaded heart. Cardiovasc Res 2015; 106:217-26. [DOI: 10.1093/cvr/cvv002] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 12/20/2014] [Indexed: 01/02/2023] Open
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Friedrich FW, Reischmann S, Schwalm A, Unger A, Ramanujam D, Münch J, Müller OJ, Hengstenberg C, Galve E, Charron P, Linke WA, Engelhardt S, Patten M, Richard P, van der Velden J, Eschenhagen T, Isnard R, Carrier L. FHL2 expression and variants in hypertrophic cardiomyopathy. Basic Res Cardiol 2014; 109:451. [PMID: 25358972 PMCID: PMC4215105 DOI: 10.1007/s00395-014-0451-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2014] [Revised: 10/04/2014] [Accepted: 10/22/2014] [Indexed: 11/28/2022]
Abstract
Based on evidence that FHL2 (four and a half LIM domains protein 2) negatively regulates cardiac hypertrophy we tested whether FHL2 altered expression or variants could be associated with hypertrophic cardiomyopathy (HCM). HCM is a myocardial disease characterized by left ventricular hypertrophy, diastolic dysfunction and increased interstitial fibrosis and is mainly caused by mutations in genes coding for sarcomeric proteins. FHL2 mRNA level, FHL2 protein level and I-band-binding density were lower in HCM patients than control individuals. Screening of 121 HCM patients without mutations in established disease genes identified 2 novel (T171M, V187L) and 4 known (R177Q, N226N, D268D, P273P) FHL2 variants in unrelated HCM families. We assessed the structural and functional consequences of the nonsynonymous substitutions after adeno-associated viral-mediated gene transfer in cardiac myocytes and in 3D-engineered heart tissue (EHT). Overexpression of FHL2 wild type or nonsynonymous substitutions in cardiac myocytes markedly down-regulated α-skeletal actin and partially blunted hypertrophy induced by phenylephrine or endothelin-1. After gene transfer in EHTs, force and velocity of both contraction and relaxation were higher with T171M and V187L FHL2 variants than wild type under basal conditions. Finally, chronic phenylephrine stimulation depressed EHT function in all groups, but to a lower extent in T171M-transduced EHTs. These data suggest that (1) FHL2 is down-regulated in HCM, (2) both FHL2 wild type and variants partially protected phenylephrine- or endothelin-1-induced hypertrophy in cardiac myocytes, and (3) FHL2 T171M and V187L nonsynonymous variants induced altered EHT contractility. These findings provide evidence that the 2 novel FHL2 variants could increase cardiac function in HCM.
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Affiliation(s)
- Felix W. Friedrich
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Silke Reischmann
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Aileen Schwalm
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Andreas Unger
- Department of Cardiovascular Physiology, Ruhr University Bochum, Bochum, Germany
| | - Deepak Ramanujam
- Institute of Pharmacology and Toxicology, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich, Munich, Germany
| | - Julia Münch
- University Heart Center Hamburg, Hamburg, Germany
| | - Oliver J. Müller
- Department of Cardiology, Internal Medicine III, University Hospital Heidelberg, Heidelberg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Heidelberg, Germany
| | - Christian Hengstenberg
- Present Address: German Heart Centre of the Technical University Munich, Munich, Germany
- Klinik und Poliklinik für Innere Medizin II, Universitätsklinikum Regensburg, Regensburg, Germany
| | - Enrique Galve
- Unitat d’Insuficiència Cardiaca, Servei de Cardiologia, Hospital Vall d’Hebron, Barcelona, Spain
| | - Philippe Charron
- Inserm, U956, Paris, France
- ICAN Institute, UPMC Univ Paris 06, Paris, France
| | - Wolfgang A. Linke
- Department of Cardiovascular Physiology, Ruhr University Bochum, Bochum, Germany
| | - Stefan Engelhardt
- Institute of Pharmacology and Toxicology, Technical University Munich, Munich, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Munich, Munich, Germany
| | | | - Pascale Richard
- Inserm, U956, Paris, France
- ICAN Institute, UPMC Univ Paris 06, Paris, France
- Groupe Hospitalier Pitié-Salpêtrière, AP-HP Centre de référence des maladies cardiaques héréditaires, Paris, France
- Groupe Hospitalier Pitié-Salpêtrière, AP-HP,UF Cardiogénétique et Myogénétique, Paris, France
| | - Jolanda van der Velden
- Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, Amsterdam, The Netherlands
| | - Thomas Eschenhagen
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
| | - Richard Isnard
- Inserm, U956, Paris, France
- ICAN Institute, UPMC Univ Paris 06, Paris, France
- Groupe Hospitalier Pitié-Salpêtrière, AP-HP Centre de référence des maladies cardiaques héréditaires, Paris, France
| | - Lucie Carrier
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
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Fischer G, Winklbaur-Hausknost B, Jagsch R, Graf-Rohrmeister K, Unger A, Baewert A, Langer M, Thau K. SY37-1 * LESSONS LEARNED FROM A COMPARISON OF EVIDENCE-BASED RESEARCH IN PREGNANT OPIOID-DEPENDENT WOMEN. Alcohol Alcohol 2014. [DOI: 10.1093/alcalc/agu052.153] [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: 11/13/2022] Open
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45
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Kirchner L, Graf-Rohrmeister K, Klebermass-Schrehof K, Weninger M, Jagsch R, Metz V, Unger A, Fischer G. Neonatal abstinence syndrome in European and North American neonates: differences in clinical characteristics derived from a prospective randomized trial. Klin Padiatr 2014; 226:274-80. [PMID: 25062111 DOI: 10.1055/s-0034-1372586] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Due to the steady increase of substance-dependent pregnant women the neonatal abstinence syndrome has become an increasingly important issue in neonatology. The present study investigates site-specific differences of detailed symptoms and treatment of neonatal abstinence syndrome within the context of an international multicenter clinical trial. METHODS Site specific neonatal data analyses from a prospective randomized, double-blind, double-dummy clinical trial (MOTHER study) was performed. A standardized NAS rating and treatment protocol was applied, while non-pharmacological care of NAS symptoms differed across the sites. RESULTS Urban US neonates exhibited most neurological symptoms (p<0.001) while in Europe autonomous, respiratory and gastrointestinal symptoms were found significantly more often compared to urban and/or rural US (p<0.05). Methadone produced significantly greater scores than buprenorphine in neurological, behavioural and respiratory symptoms regardless of the sites (ps<0.05). NAS treatment rates in all site clusters were similar for methadone-exposed neonates, while in Europe significantly more buprenorphine-exposed neonates were treated (p=0.001) than in US site clusters. Urban US neonates had significantly higher NAS scores (p<0.01) compared to rural US and European neonates, and needed significantly higher morphine doses (p<0.05) with longer treatment duration. Birth weight, length and head circumference did not differ significantly among the site clusters, but APGAR scores were significantly higher in European (p<0.01) neonates. CONCLUSION In addition to intrauterine medication exposure other aspects such as different addiction severity of the mothers, different treatment modalities including rooming-in as well as the frequency of NAS ratings may be influencing the course of NAS.
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Affiliation(s)
- L Kirchner
- Division of General Paediatrics and Neonatology, Department of Paediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - K Graf-Rohrmeister
- Division of General Paediatrics and Neonatology, Department of Paediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - K Klebermass-Schrehof
- Division of General Paediatrics and Neonatology, Department of Paediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - M Weninger
- Division of General Paediatrics and Neonatology, Department of Paediatrics and Adolescent Medicine, Medical University of Vienna, Austria
| | - R Jagsch
- Faculty of Psychology, University of Vienna, Austria
| | - V Metz
- Addiction Clinic, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
| | - A Unger
- Addiction Clinic, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
| | - G Fischer
- Addiction Clinic, Department of Psychiatry and Psychotherapy, Medical University of Vienna, Austria
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Unger A, Brandt L, Matznetter A, Zachbauer C, Fischer G, Jagsch R. Substanzmissbrauchsmuster von Universitätsstudierenden: Regionale und Geschlechtsdifferenzen. Suchttherapie 2014. [DOI: 10.1055/s-0034-1374625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- A. Unger
- Universitätsklinik für Psychiatrie und Psychotherapie, Medizinische Universität Wien
| | - L. Brandt
- Zentrum für Public Health, Medizinische Universität Wien
| | - A. Matznetter
- Universitätsklinik für Psychiatrie und Psychotherapie, Medizinische Universität Wien
| | - C. Zachbauer
- Universitätsklinik für Psychiatrie und Psychotherapie, Medizinische Universität Wien
| | - G. Fischer
- Zentrum für Public Health, Medizinische Universität Wien
| | - R. Jagsch
- Institut für Angewandte Psychologie: Gesundheit, Entwicklung und Förderung, Fakultät für Psychologie, Universität Wien
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Franssen C, Chen SH, Unger A, Korkmaz H, Niessen J, Linke W, Musters R, Paulus W, Hamdani N. METABOLIC COMORBIDITIES ASSOCIATED WITH ENDOTHELIAL INFLAMMATION AND REDUCED NO-BIOAVALABILITY AS A NOVEL PARADIGM FOR HEART FAILURE WITH PRESERVED EJECTION FRACTION. J Am Coll Cardiol 2014. [DOI: 10.1016/s0735-1097(14)60970-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Kötter S, Unger A, Hamdani N, Lang P, Vorgerd M, Nagel-Steger L, Linke WA. Human myocytes are protected from titin aggregation-induced stiffening by small heat shock proteins. J Gen Physiol 2014. [DOI: 10.1085/jgp.1432oia1] [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: 11/20/2022] Open
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Kötter S, Unger A, Hamdani N, Lang P, Vorgerd M, Nagel-Steger L, Linke WA. Human myocytes are protected from titin aggregation-induced stiffening by small heat shock proteins. ACTA ACUST UNITED AC 2014; 204:187-202. [PMID: 24421331 PMCID: PMC3897184 DOI: 10.1083/jcb.201306077] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Small heat shock proteins translocate to unfolded titin Ig domains under stress conditions to prevent titin aggregation and myocyte stiffening. In myocytes, small heat shock proteins (sHSPs) are preferentially translocated under stress to the sarcomeres. The functional implications of this translocation are poorly understood. We show here that HSP27 and αB-crystallin associated with immunoglobulin-like (Ig) domain-containing regions, but not the disordered PEVK domain (titin region rich in proline, glutamate, valine, and lysine), of the titin springs. In sarcomeres, sHSP binding to titin was actin filament independent and promoted by factors that increased titin Ig unfolding, including sarcomere stretch and the expression of stiff titin isoforms. Titin spring elements behaved predominantly as monomers in vitro. However, unfolded Ig segments aggregated, preferentially under acidic conditions, and αB-crystallin prevented this aggregation. Disordered regions did not aggregate. Promoting titin Ig unfolding in cardiomyocytes caused elevated stiffness under acidic stress, but HSP27 or αB-crystallin suppressed this stiffening. In diseased human muscle and heart, both sHSPs associated with the titin springs, in contrast to the cytosolic/Z-disk localization seen in healthy muscle/heart. We conclude that aggregation of unfolded titin Ig domains stiffens myocytes and that sHSPs translocate to these domains to prevent this aggregation.
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Affiliation(s)
- Sebastian Kötter
- Department of Cardiovascular Physiology and 2 Neurological University Clinic Bergmannsheil, Ruhr University Bochum, 44780 Bochum, Germany
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Kötter S, Unger A, Hamdani N, Nagel-Steger L, Linke WA. Small Heat Shock Proteins Prevent Titin Aggregation-Induced Stiffening in Human Myocytes. Biophys J 2014. [DOI: 10.1016/j.bpj.2013.11.915] [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: 11/25/2022] Open
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