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Li J, Qi X, Ramos KS, Lanters E, Keijer J, de Groot N, Brundel B, Zhang D. Disruption of Sarcoplasmic Reticulum-Mitochondrial Contacts Underlies Contractile Dysfunction in Experimental and Human Atrial Fibrillation: A Key Role of Mitofusin 2. J Am Heart Assoc 2022; 11:e024478. [PMID: 36172949 DOI: 10.1161/jaha.121.024478] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Atrial fibrillation (AF) is the most common and progressive tachyarrhythmia. Diabetes is a common risk factor for AF. Recent research findings revealed that microtubule network disruption underlies AF. The microtubule network mediates the contact between sarcoplasmic reticulum and mitochondria, 2 essential organelles for normal cardiomyocyte function. Therefore, disruption of the microtubule network may impair sarcoplasmic reticulum and mitochondrial contacts (SRMCs) and subsequently cardiomyocyte function. The current study aims to determine whether microtubule-mediated SRMCs disruption underlies diabetes-associated AF. Methods and Results Tachypacing (mimicking AF) and high glucose (mimicking diabetes) significantly impaired contractile function in HL-1 cardiomyocytes (loss of calcium transient) and Drosophila (reduced heart rate and increased arrhythmia), both of which were prevented by microtubule stabilizers. Furthermore, both tachypacing and high glucose significantly reduced SRMCs and the key SRMC tether protein mitofusin 2 (MFN2) and resulted in consequent mitochondrial dysfunction, all of which were prevented by microtubule stabilizers. In line with pharmacological interventions with microtubule stabilizers, cardiac-specific knockdown of MFN2 induced arrhythmia in Drosophila and overexpression of MFN2 prevented tachypacing- and high glucose-induced contractile dysfunction in HL-1 cardiomyocytes and/or Drosophila. Consistently, SRMCs/MFN2 levels were significantly reduced in right atrial appendages of patients with persistent AF compared with control patients, which was aggravated in patients with diabetes. Conclusions SRMCs may play a critical role in clinical AF, especially diabetes-related AF. Furthermore, SRMCs can be regulated by microtubules and MFN2, which represent novel potential therapeutic targets for AF.
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Affiliation(s)
- Jin Li
- Department of Physiology Amsterdam UMC location Vrije Universiteit Amsterdam Amsterdam The Netherlands.,Amsterdam Cardiovascular Sciences Heart Failure and Arrhythmias Amsterdam The Netherlands.,Division of Metabolism, Endocrinology and Diabetes and Department of Internal Medicine University of Michigan Medical School Ann Arbor MI
| | - Xi Qi
- Human and Animal Physiology Wageningen University Wageningen The Netherlands
| | - Kennedy S Ramos
- Department of Physiology Amsterdam UMC location Vrije Universiteit Amsterdam Amsterdam The Netherlands.,Amsterdam Cardiovascular Sciences Heart Failure and Arrhythmias Amsterdam The Netherlands
| | - Eva Lanters
- Department of Cardiology Erasmus Medical Center Rotterdam The Netherlands
| | - Jaap Keijer
- Human and Animal Physiology Wageningen University Wageningen The Netherlands
| | - Natasja de Groot
- Department of Cardiology Erasmus Medical Center Rotterdam The Netherlands
| | - Bianca Brundel
- Department of Physiology Amsterdam UMC location Vrije Universiteit Amsterdam Amsterdam The Netherlands.,Amsterdam Cardiovascular Sciences Heart Failure and Arrhythmias Amsterdam The Netherlands
| | - Deli Zhang
- Department of Physiology Amsterdam UMC location Vrije Universiteit Amsterdam Amsterdam The Netherlands.,Human and Animal Physiology Wageningen University Wageningen The Netherlands
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Pesce M, Agostoni P, Bøtker HE, Brundel B, Davidson SM, Caterina RD, Ferdinandy P, Girao H, Gyöngyösi M, Hulot JS, Lecour S, Perrino C, Schulz R, Sluijter JP, Steffens S, Tancevski I, Gollmann-Tepeköylü C, Tschöpe C, Linthout SV, Madonna R. COVID-19-related cardiac complications from clinical evidences to basic mechanisms: opinion paper of the ESC Working Group on Cellular Biology of the Heart. Cardiovasc Res 2021; 117:2148-2160. [PMID: 34117887 DOI: 10.1093/cvr/cvab201] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 06/09/2021] [Indexed: 12/15/2022] Open
Abstract
The pandemic of coronavirus disease (COVID)-19 is a global threat, causing high mortality, especially in the elderly. The main symptoms and the primary cause of death are related to interstitial pneumonia. Viral entry also into myocardial cells mainly via the angiotensin converting enzyme type 2 (ACE2) receptor and excessive production of pro-inflammatory cytokines, however, also make the heart susceptible to injury. In addition to the immediate damage caused by the acute inflammatory response, the heart may also suffer from long-term consequences of COVID-19, potentially causing a post-pandemic increase in cardiac complications. Although the main cause of cardiac damage in COVID-19 remains coagulopathy with micro- (and to a lesser extent macro-) vascular occlusion, open questions remain about other possible modalities of cardiac dysfunction, such as direct infection of myocardial cells, effects of cytokines storm, and mechanisms related to enhanced coagulopathy. In this opinion paper, we focus on these lesser appreciated possibilities and propose experimental approaches that could provide a more comprehensive understanding of the cellular and molecular bases of cardiac injury in COVID-19 patients. We first discuss approaches to characterize cardiac damage caused by possible direct viral infection of cardiac cells, followed by formulating hypotheses on how to reproduce and investigate the hyperinflammatory and pro-thrombotic conditions observed in the heart of COVID-19 patients using experimental in vitro systems. Finally, we elaborate on strategies to discover novel pathology biomarkers using omics platforms.
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Affiliation(s)
| | - Piergiuseppe Agostoni
- Centro Cardiologico Monzino, IRCCS, Milan, Italy
- Dipartimento di Scienze Cliniche e di Comunità, University of Milan, Milan, Italy
| | - Hans-Erik Bøtker
- Department of Cardiology, Aarhus University Hospital, Aarhus N, Denmark
| | - Bianca Brundel
- Department of Physiology, Amsterdam University Medical Centers (UMC), Vrije Universiteit, Amsterdam Cardiovascular Sciences, Amsterdam, The Netherlands
| | - Sean M Davidson
- The Hatter Cardiovascular Institute, University College London, London, UK
| | | | - Peter Ferdinandy
- Department of Pharmacology and Pharmacotherapy, Semmelweis University, Budapest, Hungary
- Pharmahungary Group, Szeged, Hungary
| | - Henrique Girao
- Center for Innovative Biomedicine and Biotechnology (CIBB), Clinical Academic Centre of Coimbra (CACC), Faculty of Medicine, Univ Coimbra, Institute for Clinical and Biomedical Research (iCBR), Coimbra, Portugal
| | - Mariann Gyöngyösi
- Department of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Jean-Sebastien Hulot
- Université de Paris, PARCC, INSERM, Paris, France
- CIC1418 and DMU CARTE, AP-HP, Hôpital Européen Georges-Pompidou, Paris, France
| | - Sandrine Lecour
- Faculty of Health Sciences, Hatter Institute for Cardiovascular Research in Africa and Cape Heart Institute, University of Cape Town, Cape Town, South Africa
| | - Cinzia Perrino
- Department of Advanced Biomedical Sciences, Federico II University, Naples, Italy
| | - Rainer Schulz
- Institute of Physiology, Justus-Liebig University Giessen, Giessen, Germany
| | - Joost Pg Sluijter
- Laboratory for Experimental Cardiology, Department of Cardiology, Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Sabine Steffens
- Institute for Cardiovascular Prevention, German Centre for Cardiovascular Research (DZHK), Ludwig-Maximilians-University (LMU) Munich, Partner Site Munich Heart Alliance, Munich, Germany
| | - Ivan Tancevski
- Department of Internal Medicine II, Medical University of Innsbruck, Innsbruck, Austria
| | | | - Carsten Tschöpe
- Department of Cardiology, Charité, Campus Virchow Klinikum, Berlin, Germany
- BIH Center for Regenerative Therapies (BCRT), Berlin Institute of Health at Charité-Universitätmedizin Berlin, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Partner Site Berlin, Berlin, Germany
| | - Sophie van Linthout
- Department of Cardiology, Charité, Campus Virchow Klinikum, Berlin, Germany
- BIH Center for Regenerative Therapies (BCRT), Berlin Institute of Health at Charité-Universitätmedizin Berlin, Berlin, Germany
| | - Rosalinda Madonna
- Cardiology Chair, University of Pisa, Pisa University Hospital, Pisa, Italy
- Department of Internal Medicine, University of Texas Medical School in Houston, Houston, TX, USA
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5
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Schram-Serban C, Heida A, Roos-Serote MC, Knops P, Kik C, Brundel B, Bogers AJJC, de Groot NMS. Heterogeneity in Conduction Underlies Obesity-Related Atrial Fibrillation Vulnerability. Circ Arrhythm Electrophysiol 2020; 13:e008161. [PMID: 32301327 DOI: 10.1161/circep.119.008161] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Obese patients are more vulnerable to development of atrial fibrillation but pathophysiology underlying this relation is only partly understood. The aim of this study is to compare the severity and extensiveness of conduction disorders between obese patients and nonobese patients measured at a high-resolution scale. METHODS Patients (N=212) undergoing cardiac surgery (male:161, 63±11 years) underwent epicardial mapping of the right atrium, Bachmann bundle, and left atrium during sinus rhythm. Conduction delay (CD) was defined as interelectrode conduction time of 7 to 11 ms and conduction block (CB) as conduction time ≥12 ms. Prevalence of CD/CB, continuous CDCB (cCDCB), length of CD/CB/cCDCB lines, and severity of CB were analyzed. RESULTS In obese patients, the overall incidence of CD (3.1% versus 2.6%; P=0.002), CB (1.8% versus 1.2%; P<0.001), and cCDCB (2.6% versus 1.9%; P<0.001) was higher and CD (P=0.012) and cCDCB (P<0.001) lines are longer. There were more conduction disorders at Bachmann bundle and this area has a higher incidence of CD (4.4% versus 3.3%, P=0.002), CB (3.1% versus 1.6%, P<0.001), cCDCB (4.6% versus 2.7%, P<0.001) and longer CD (P<0.001) or cCDCB (P=0.017) lines. The severity of CB is also higher, particularly in the Bachmann bundle (P=0.008) and pulmonary vein (P=0.020) areas. In addition, obese patients have a higher incidence of early de-novo postoperative atrial fibrillation (P=0.003). Body mass index (P=0.037) and the overall amount of CB (P=0.012) were independent predictors for incidence of early postoperative atrial fibrillation. CONCLUSIONS Compared with nonobese patients, obese patients have higher incidences of conduction disorders, which are also more extensive and more severe. These differences in heterogeneity in conduction are already present during sinus rhythm and may explain the higher vulnerability to atrial fibrillation of obese patients.
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Affiliation(s)
- Corina Schram-Serban
- Department of Cardiology (C.S.-S., A.H., M.C.R.-S., P.K., N.M.S.d.G.), Erasmus University Medical Center, Rotterdam
| | - Annejet Heida
- Department of Cardiology (C.S.-S., A.H., M.C.R.-S., P.K., N.M.S.d.G.), Erasmus University Medical Center, Rotterdam
| | - Maarten C Roos-Serote
- Department of Cardiology (C.S.-S., A.H., M.C.R.-S., P.K., N.M.S.d.G.), Erasmus University Medical Center, Rotterdam
| | - Paul Knops
- Department of Cardiology (C.S.-S., A.H., M.C.R.-S., P.K., N.M.S.d.G.), Erasmus University Medical Center, Rotterdam
| | - Charles Kik
- Department of Cardio-Thoracic Surgery (C.K., A.J.J.C.B.), Erasmus University Medical Center, Rotterdam
| | - Bianca Brundel
- Department of Physiology, Amsterdam UMC, Vrije Universiteit Amsterdam (B.B.).,Cardiovascular Sciences, Amsterdam, The Netherlands (B.B.)
| | - Ad J J C Bogers
- Department of Cardio-Thoracic Surgery (C.K., A.J.J.C.B.), Erasmus University Medical Center, Rotterdam
| | - Natasja M S de Groot
- Department of Cardiology (C.S.-S., A.H., M.C.R.-S., P.K., N.M.S.d.G.), Erasmus University Medical Center, Rotterdam
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