1
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Golubeva VA, Dorn LE, Gilbert CJ, Rabolli CP, Das AS, Wanasinghe VS, Veress R, Terentyev D, Accornero F. Loss of YTHDF2 Alters the Expression of m 6A-Modified Myzap and Causes Adverse Cardiac Remodeling. JACC Basic Transl Sci 2023; 8:1180-1194. [PMID: 37791304 PMCID: PMC10543918 DOI: 10.1016/j.jacbts.2023.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/06/2023] [Accepted: 03/07/2023] [Indexed: 10/05/2023]
Abstract
How post-transcriptional regulation of gene expression, such as through N6-methyladenosine (m6A) messenger RNA methylation, impacts heart function is not well understood. We found that loss of the m6A binding protein YTHDF2 in cardiomyocytes of adult mice drove cardiac dysfunction. By proteomics, we found myocardial zonula adherens protein (MYZAP) within the top up-regulated proteins in knockout cardiomyocytes. We further demonstrated that YTHDF2 binds m6A-modified Myzap messenger RNA and controls its stability. Cardiac overexpression of MYZAP has been associated with cardiomyopathy. Thus, our findings provide an important new mechanism for the YTHDF2-dependent regulation of this target and therein its novel role in the maintenance of cardiac homeostasis.
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Affiliation(s)
- Volha A. Golubeva
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Lisa E. Dorn
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Christopher J. Gilbert
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Charles P. Rabolli
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Anindhya Sundar Das
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Vishmi S. Wanasinghe
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Roland Veress
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Dmitry Terentyev
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Federica Accornero
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
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2
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Nielsen MS, van Opbergen CJM, van Veen TAB, Delmar M. The intercalated disc: a unique organelle for electromechanical synchrony in cardiomyocytes. Physiol Rev 2023; 103:2271-2319. [PMID: 36731030 PMCID: PMC10191137 DOI: 10.1152/physrev.00021.2022] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 01/24/2023] [Accepted: 01/30/2023] [Indexed: 02/04/2023] Open
Abstract
The intercalated disc (ID) is a highly specialized structure that connects cardiomyocytes via mechanical and electrical junctions. Although described in some detail by light microscopy in the 19th century, it was in 1966 that electron microscopy images showed that the ID represented apposing cell borders and provided detailed insight into the complex ID nanostructure. Since then, much has been learned about the ID and its molecular composition, and it has become evident that a large number of proteins, not all of them involved in direct cell-to-cell coupling via mechanical or gap junctions, reside at the ID. Furthermore, an increasing number of functional interactions between ID components are emerging, leading to the concept that the ID is not the sum of isolated molecular silos but an interacting molecular complex, an "organelle" where components work in concert to bring about electrical and mechanical synchrony. The aim of the present review is to give a short historical account of the ID's discovery and an updated overview of its composition and organization, followed by a discussion of the physiological implications of the ID architecture and the local intermolecular interactions. The latter will focus on both the importance of normal conduction of cardiac action potentials as well as the impact on the pathophysiology of arrhythmias.
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Affiliation(s)
- Morten S Nielsen
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Chantal J M van Opbergen
- The Leon Charney Division of Cardiology, New York University Grossmann School of Medicine, New York, New York, United States
| | - Toon A B van Veen
- Department of Medical Physiology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Mario Delmar
- The Leon Charney Division of Cardiology, New York University Grossmann School of Medicine, New York, New York, United States
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3
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Petersen M, Schmiedel N, Dierck F, Hille S, Remes A, Senger F, Schmidt I, Lüllmann-Rauch R, Müller OJ, Frank D, Rangrez AY, Frey N, Kuhn C. Fibin regulates cardiomyocyte hypertrophy and causes protein-aggregate-associated cardiomyopathy in vivo. Front Mol Biosci 2023; 10:1169658. [PMID: 37342207 PMCID: PMC10278231 DOI: 10.3389/fmolb.2023.1169658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Accepted: 05/16/2023] [Indexed: 06/22/2023] Open
Abstract
Despite the identification of numerous molecular pathways modulating cardiac hypertrophy its pathogenesis is not completely understood. In this study we define an unexpected role for Fibin ("fin bud initiation factor homolog") in cardiomyocyte hypertrophy. Via gene expression profiling in hypertrophic murine hearts after transverse aortic constriction we found a significant induction of Fibin. Moreover, Fibin was upregulated in another mouse model of cardiac hypertrophy (calcineurin-transgenics) as well as in patients with dilated cardiomyopathy. Immunoflourescence microscopy revealed subcellular localization of Fibin at the sarcomeric z-disc. Overexpression of Fibin in neonatal rat ventricular cardiomyocytes revealed a strong anti-hypertrophic effect through inhibiting both, NFAT- and SRF-dependent signalling. In contrast, transgenic mice with cardiac-restricted overexpression of Fibin developed dilated cardiomyopathy, accompanied by induction of hypertrophy-associated genes. Moreover, Fibin overexpression accelerated the progression to heart failure in the presence of prohypertrophic stimuli such as pressure overload and calcineurin overexpression. Histological and ultrastructural analyses surprisingly showed large protein aggregates containing Fibin. On the molecular level, aggregate formation was accompanied by an induction of the unfolded protein response subsequent UPR-mediated apoptosis and autophagy. Taken together, we identified Fibin as a novel potent negative regulator of cardiomyocyte hypertrophy in vitro. Yet, heart-specific Fibin overexpression in vivo causes development of a protein-aggregate-associated cardiomyopathy. Because of close similarities to myofibrillar myopathies, Fibin represents a candidate gene for cardiomyopathy and Fibin transgenic mice may provide additional mechanistic insight into aggregate formation in these diseases.
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Affiliation(s)
- Matthias Petersen
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Nesrin Schmiedel
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Franziska Dierck
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Susanne Hille
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Anca Remes
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Frauke Senger
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Inga Schmidt
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | | | - Oliver J. Müller
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Derk Frank
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Ashraf Y. Rangrez
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Norbert Frey
- Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Heidelberg, Germany
- DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Christian Kuhn
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
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4
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Deshpande A, Shetty PMV, Frey N, Rangrez AY. SRF: a seriously responsible factor in cardiac development and disease. J Biomed Sci 2022; 29:38. [PMID: 35681202 PMCID: PMC9185982 DOI: 10.1186/s12929-022-00820-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 05/27/2022] [Indexed: 11/10/2022] Open
Abstract
The molecular mechanisms that regulate embryogenesis and cardiac development are calibrated by multiple signal transduction pathways within or between different cell lineages via autocrine or paracrine mechanisms of action. The heart is the first functional organ to form during development, which highlights the importance of this organ in later stages of growth. Knowledge of the regulatory mechanisms underlying cardiac development and adult cardiac homeostasis paves the way for discovering therapeutic possibilities for cardiac disease treatment. Serum response factor (SRF) is a major transcription factor that controls both embryonic and adult cardiac development. SRF expression is needed through the duration of development, from the first mesodermal cell in a developing embryo to the last cell damaged by infarction in the myocardium. Precise regulation of SRF expression is critical for mesoderm formation and cardiac crescent formation in the embryo, and altered SRF levels lead to cardiomyopathies in the adult heart, suggesting the vital role played by SRF in cardiac development and disease. This review provides a detailed overview of SRF and its partners in their various functions and discusses the future scope and possible therapeutic potential of SRF in the cardiovascular system.
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Affiliation(s)
- Anushka Deshpande
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany.,Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research), Partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Prithviraj Manohar Vijaya Shetty
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Norbert Frey
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Heidelberg, Germany.,DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Heidelberg, Germany
| | - Ashraf Yusuf Rangrez
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Heidelberg, Germany. .,DZHK (German Centre for Cardiovascular Research), Partner Site Heidelberg/Mannheim, Heidelberg, Germany.
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5
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Heliö K, Mäyränpää MI, Saarinen I, Ahonen S, Junnila H, Tommiska J, Weckström S, Holmström M, Toivonen M, Nikus K, Hathaway J, Siivonen P, Muona M, Sistonen J, Salmenperä P, Gentile M, Paananen J, Myllykangas S, Alastalo TP, Heliö T, Koskenvuo J. GRINL1A Complex Transcription Unit Containing GCOM1, MYZAP, and POLR2M Genes Associates with Fully Penetrant Recessive Dilated Cardiomyopathy. Front Genet 2021; 12:786705. [PMID: 34899865 PMCID: PMC8656111 DOI: 10.3389/fgene.2021.786705] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 11/03/2021] [Indexed: 11/13/2022] Open
Abstract
Background: Familial dilated cardiomyopathy (DCM) is a monogenic disorder typically inherited in an autosomal dominant pattern. We have identified two Finnish families with familial cardiomyopathy that is not explained by a variant in any previously known cardiomyopathy gene. We describe the cardiac phenotype related to homozygous truncating GCOM1 variants. Methods and Results: This study included two probands and their relatives. All the participants are of Finnish ethnicity. Whole-exome sequencing was used to test the probands; bi-directional Sanger sequencing was used to identify the GCOM1 variants in probands' family members. Clinical evaluation was performed, medical records and death certificates were obtained. Immunohistochemical analysis of myocardial samples was conducted. A homozygous GCOM1 variant was identified altogether in six individuals, all considered to be affected. None of the nine heterozygous family members fulfilled any cardiomyopathy criteria. Heart failure was the leading clinical feature, and the patients may have had a tendency for atrial arrhythmias. Conclusions: This study demonstrates the significance of GCOM1 variants as a cause of human cardiomyopathy and highlights the importance of searching for new candidate genes when targeted gene panels do not yield a positive outcome.
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Affiliation(s)
- Krista Heliö
- Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Mikko I Mäyränpää
- Department of Pathology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Inka Saarinen
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | - Saija Ahonen
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | - Heidi Junnila
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | | | - Sini Weckström
- Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Miia Holmström
- Department of Radiology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Mia Toivonen
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | - Kjell Nikus
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland.,Heart Center, Tampere University Hospital, Tampere, Finland
| | - Julie Hathaway
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | - Pauli Siivonen
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | - Mikko Muona
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | | | | | | | - Jussi Paananen
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
| | | | | | - Tiina Heliö
- Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Juha Koskenvuo
- Blueprint Genetics, A Quest Diagnostics Company, Espoo, Finland
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6
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SH3-Binding Glutamic Acid Rich-Deficiency Augments Apoptosis in Neonatal Rat Cardiomyocytes. Int J Mol Sci 2021; 22:ijms222011042. [PMID: 34681711 PMCID: PMC8541172 DOI: 10.3390/ijms222011042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 10/05/2021] [Accepted: 10/08/2021] [Indexed: 11/16/2022] Open
Abstract
Congenital heart disease (CHD) is one of the most common birth defects in humans, present in around 40% of newborns with Down’s syndrome (DS). The SH3 domain-binding glutamic acid-rich (SH3BGR) gene, which maps to the DS region, belongs to a gene family encoding a cluster of small thioredoxin-like proteins sharing SH3 domains. Although its expression is confined to the cardiac and skeletal muscle, the physiological role of SH3BGR in the heart is poorly understood. Interestingly, we observed a significant upregulation of SH3BGR in failing hearts of mice and human patients with hypertrophic cardiomyopathy. Along these lines, the overexpression of SH3BGR exhibited a significant increase in the expression of hypertrophic markers (Nppa and Nppb) and increased cell surface area in neonatal rat ventricular cardiomyocytes (NRVCMs), whereas its knockdown attenuated cellular hypertrophy. Mechanistically, using serum response factor (SRF) response element-driven luciferase assays in the presence or the absence of RhoA or its inhibitor, we found that the pro-hypertrophic effects of SH3BGR are mediated via the RhoA–SRF axis. Furthermore, SH3BGR knockdown resulted in the induction of apoptosis and reduced cell viability in NRVCMs via apoptotic Hippo–YAP signaling. Taking these results together, we here show that SH3BGR is vital for maintaining cytoskeletal integrity and cellular viability in NRVCMs through its modulation of the SRF/YAP signaling pathways.
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7
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Abstract
Intercalated discs (ICDs) are highly orchestrated structures that connect neighboring cardiomyocytes in the heart. Three major complexes are distinguished in ICD: desmosome, adherens junction (AJ), and gap junction (GJ). Desmosomes are major cell adhesion junctions that anchor cell membrane to the intermediate filament network; AJs connect the actin cytoskeleton of adjacent cells; and gap junctions metabolically and electrically connect the cytoplasm of adjacent cardiomyocytes. All these complexes work as a single unit, the so-called area composita, interdependently rather than individually. Mutation or altered expression of ICD proteins results in various cardiac diseases, such as ARVC (arrhythmogenic right ventricular cardiomyopathy), dilated cardiomyopathy, and hypotrophy cardiomyopathy, eventually leading to heart failure. In this article, we first review the recent findings on the structural organization of ICD and their functions and then focus on the recent advances in molecular pathogenesis of the ICD-related heart diseases, which include two major areas: i) the ICD gene mutations in cardiac diseases, and ii) the involvement of ICD proteins in signal transduction pathways leading to myocardium remodeling and eventual heart failure. These major ICD-related signaling pathways include Wnt/β-catenin pathway, p38 MAPK cascade, Rho-dependent serum response factor (SRF) signaling, calcineurin/NFAT signaling, Hippo kinase cascade, etc., which are differentially regulated in pathological conditions.
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8
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Filomena MC, Yamamoto DL, Caremani M, Kadarla VK, Mastrototaro G, Serio S, Vydyanath A, Mutarelli M, Garofalo A, Pertici I, Knöll R, Nigro V, Luther PK, Lieber RL, Beck MR, Linari M, Bang M. Myopalladin promotes muscle growth through modulation of the serum response factor pathway. J Cachexia Sarcopenia Muscle 2020; 11:169-194. [PMID: 31647200 PMCID: PMC7015241 DOI: 10.1002/jcsm.12486] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 07/01/2019] [Accepted: 07/22/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Myopalladin (MYPN) is a striated muscle-specific, immunoglobulin-containing protein located in the Z-line and I-band of the sarcomere as well as the nucleus. Heterozygous MYPN gene mutations are associated with hypertrophic, dilated, and restrictive cardiomyopathy, and homozygous loss-of-function truncating mutations have recently been identified in patients with cap myopathy, nemaline myopathy, and congenital myopathy with hanging big toe. METHODS Constitutive MYPN knockout (MKO) mice were generated, and the role of MYPN in skeletal muscle was studied through molecular, cellular, biochemical, structural, biomechanical, and physiological studies in vivo and in vitro. RESULTS MKO mice were 13% smaller compared with wild-type controls and exhibited a 48% reduction in myofibre cross-sectional area (CSA) and significantly increased fibre number. Similarly, reduced myotube width was observed in MKO primary myoblast cultures. Biomechanical studies showed reduced isometric force and power output in MKO mice as a result of the reduced CSA, whereas the force developed by each myosin molecular motor was unaffected. While the performance by treadmill running was similar in MKO and wild-type mice, MKO mice showed progressively decreased exercise capability, Z-line damage, and signs of muscle regeneration following consecutive days of downhill running. Additionally, MKO muscle exhibited progressive Z-line widening starting from 8 months of age. RNA-sequencing analysis revealed down-regulation of serum response factor (SRF)-target genes in muscles from postnatal MKO mice, important for muscle growth and differentiation. The SRF pathway is regulated by actin dynamics as binding of globular actin to the SRF-cofactor myocardin-related transcription factor A (MRTF-A) prevents its translocation to the nucleus where it binds and activates SRF. MYPN was found to bind and bundle filamentous actin as well as interact with MRTF-A. In particular, while MYPN reduced actin polymerization, it strongly inhibited actin depolymerization and consequently increased MRTF-A-mediated activation of SRF signalling in myogenic cells. Reduced myotube width in MKO primary myoblast cultures was rescued by transduction with constitutive active SRF, demonstrating that MYPN promotes skeletal muscle growth through activation of the SRF pathway. CONCLUSIONS Myopalladin plays a critical role in the control of skeletal muscle growth through its effect on actin dynamics and consequently the SRF pathway. In addition, MYPN is important for the maintenance of Z-line integrity during exercise and aging. These results suggest that muscle weakness in patients with biallelic MYPN mutations may be associated with reduced myofibre CSA and SRF signalling and that the disease phenotype may be aggravated by exercise.
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Affiliation(s)
- Maria Carmela Filomena
- Institute of Genetic and Biomedical Research (IRGB), Milan UnitNational Research CouncilMilanItaly
- Humanitas Clinical and Research CenterRozzanoMilanItaly
| | - Daniel L. Yamamoto
- Institute of Genetic and Biomedical Research (IRGB), Milan UnitNational Research CouncilMilanItaly
| | - Marco Caremani
- Department of BiologyUniversity of FlorenceSesto FiorentinoFlorenceItaly
| | | | | | - Simone Serio
- Humanitas Clinical and Research CenterRozzanoMilanItaly
| | | | | | - Arcamaria Garofalo
- Telethon Institute of Genetics and Medicine (TIGEM)PozzuoliItaly
- Department of Precision MedicineUniversity of Campania “Luigi Vanvitelli”NaplesItaly
| | - Irene Pertici
- Department of BiologyUniversity of FlorenceSesto FiorentinoFlorenceItaly
| | - Ralph Knöll
- Integrated Cardio Metabolic Centre (ICMC), Myocardial GeneticsKarolinska Institutet, University Hospital, Heart and Vascular ThemeSweden
- Research and Early Development, Cardiovascular, Renal and Metabolic Diseases (CVRM), Biopharmaceuticals R&DAstraZenecaMölndalSweden
| | - Vincenzo Nigro
- Telethon Institute of Genetics and Medicine (TIGEM)PozzuoliItaly
- Department of Precision MedicineUniversity of Campania “Luigi Vanvitelli”NaplesItaly
| | | | - Richard L. Lieber
- Shirley Ryan AbilityLab and Hines V.A. Medical Center ChicagoChicagoILUSA
- Department of Physical Medicine and RehabilitationNorthwestern UniversityChicagoILUSA
- Department of Orthopaedic SurgeryUniversity of California San DiegoLa JollaCAUSA
| | - Moriah R. Beck
- Department of ChemistryWichita State UniversityWichitaKSUSA
| | - Marco Linari
- Department of BiologyUniversity of FlorenceSesto FiorentinoFlorenceItaly
| | - Marie‐Louise Bang
- Institute of Genetic and Biomedical Research (IRGB), Milan UnitNational Research CouncilMilanItaly
- Humanitas Clinical and Research CenterRozzanoMilanItaly
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9
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Green KJ, Jaiganesh A, Broussard JA. Desmosomes: Essential contributors to an integrated intercellular junction network. F1000Res 2019; 8. [PMID: 31942240 PMCID: PMC6944264 DOI: 10.12688/f1000research.20942.1] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/18/2019] [Indexed: 12/12/2022] Open
Abstract
The development of adhesive connections between cells was critical for the evolution of multicellularity and for organizing cells into complex organs with discrete compartments. Four types of intercellular junction are present in vertebrates: desmosomes, adherens junctions, tight junctions, and gap junctions. All are essential for the development of the embryonic layers and organs as well as adult tissue homeostasis. While each junction type is defined as a distinct entity, it is now clear that they cooperate physically and functionally to create a robust and functionally diverse system. During evolution, desmosomes first appeared in vertebrates as highly specialized regions at the plasma membrane that couple the intermediate filament cytoskeleton at points of strong cell–cell adhesion. Here, we review how desmosomes conferred new mechanical and signaling properties to vertebrate cells and tissues through their interactions with the existing junctional and cytoskeletal network.
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Affiliation(s)
- Kathleen J Green
- Departments of Pathology and Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA
| | - Avinash Jaiganesh
- Departments of Pathology and Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Joshua A Broussard
- Departments of Pathology and Dermatology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Robert H. Lurie Comprehensive Cancer Center of Northwestern University, Chicago, IL, USA
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10
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Rangrez AY, Kilian L, Stiebeling K, Dittmann S, Schulze-Bahr E, Frey N, Frank D. A cardiac α-actin (ACTC1) p. Gly247Asp mutation inhibits SRF-signaling in vitro in neonatal rat cardiomyocytes. Biochem Biophys Res Commun 2019; 518:500-505. [PMID: 31434612 DOI: 10.1016/j.bbrc.2019.08.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 08/14/2019] [Indexed: 12/23/2022]
Abstract
We recently identified a novel, heterozygous, and non-synonymous ACTC1 mutation (p.Gly247Asp or G247D) in a large, multi-generational family, causing atrial-septal defect followed by late-onset dilated cardiomyopathy (DCM). Molecular dynamics studies revealed possible actin polymerization defects as G247D mutation resides at the juncture of side-chain interaction, which was indeed confirmed by in vitro actin polymerization assays. Since polymerization/de-polymerization is important for the activation of Rho-GTPase-mediated serum response factor (SRF)-signaling, we studied the effect of G247D mutation using luciferase assay. Overexpression of native human ACTC1 in neonatal rat cardiomyocytes (NRVCMs) strongly activated SRF-signaling both in C2C12 cells and NRVCMs, whereas, G247D mutation abolished this activation. Mechanistically, we found reduced GTP-bound Rho-GTPase and increased nuclear localization of globular actin in NRVCMs overexpressing mutant ACTC1 possibly causing inhibition of SRF-signaling activation. In conclusion, our data suggests that human G247D ACTC1 mutation negatively regulates SRF-signaling likely contributing to the late-onset DCM observed in mutation carrier patients.
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Affiliation(s)
- Ashraf Yusuf Rangrez
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany.
| | - Lucia Kilian
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Katharina Stiebeling
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Sven Dittmann
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany
| | - Eric Schulze-Bahr
- Institute for Genetics of Heart Diseases (IfGH), Department of Cardiovascular Medicine, University Hospital Münster, Münster, Germany
| | - Norbert Frey
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Derk Frank
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany.
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11
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Kluge A, Rangrez AY, Kilian LS, Pott J, Bernt A, Frauen R, Rohrbeck A, Frey N, Frank D. Rho-family GTPase 1 (Rnd1) is a biomechanical stress-sensitive activator of cardiomyocyte hypertrophy. J Mol Cell Cardiol 2019; 129:130-143. [PMID: 30797814 DOI: 10.1016/j.yjmcc.2019.01.028] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 01/01/2023]
Abstract
Cardiac remodeling is induced by mechanical or humoral stress causing pathological changes to the heart. Here, we aimed at identifying the role of differentially regulated genes upon dynamic mechanical stretch. Microarray of dynamic stretch induced neonatal rat ventricular cardiomyocytes (NRVCMs) discovered Rho family GTPase 1 (Rnd1) as one of the significantly upregulated genes, a cardiac role of which is not known yet. Rnd1 was consistently upregulated in NRVCMs after dynamic stretch or phenylephrine (PE) stimulation, and in a mouse model of pressure overload. Overexpression of Rnd1 in NRVCMs activated the fetal gene program (including nppa and nppb) effected into a significant increase in cell surface area in untreated, stretched or PE-treated cells. Furthermore, Rnd1 overexpression showed a positive effect on cell proliferation as detected by significant increase in Ki67, Phosphohistone H3, and EdU positive NRVCMs. Through a Yeast two-hybrid screen and immunoprecipitation analysis, we identified Myozap, an intercalated disc protein, as novel interaction partner of Rnd1. Importantly, functional analysis of this interaction revealed the importance of RND1 in the RhoA and Myozap protein network that activates serum-response factor (SRF) signaling. In summary, we identified Rnd1 as a novel stretch-sensitive gene which influences cell proliferation and cellular hypertrophy via activation of RhoA-mediated SRF dependent and independent signaling pathways.
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Affiliation(s)
- Annika Kluge
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany
| | - Ashraf Yusuf Rangrez
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel 24105, Germany
| | - Lucia Sophie Kilian
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel 24105, Germany
| | - Jost Pott
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany
| | - Alexander Bernt
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel 24105, Germany
| | - Robert Frauen
- University Medical Center Eppendorf Hamburg-Eppendorf, Hamburg 20246, Germany
| | - Astrid Rohrbeck
- Hannover Medical School, Institute of Toxicology, Hannover D-30625, Germany
| | - Norbert Frey
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel 24105, Germany
| | - Derk Frank
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel 24105, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel 24105, Germany.
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12
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Galata Z, Kloukina I, Kostavasili I, Varela A, Davos CH, Makridakis M, Bonne G, Capetanaki Y. Amelioration of desmin network defects by αB-crystallin overexpression confers cardioprotection in a mouse model of dilated cardiomyopathy caused by LMNA gene mutation. J Mol Cell Cardiol 2018; 125:73-86. [PMID: 30342008 DOI: 10.1016/j.yjmcc.2018.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 10/02/2018] [Accepted: 10/16/2018] [Indexed: 10/28/2022]
Abstract
The link between the cytoplasmic desmin intermediate filaments and those of nuclear lamins serves as a major integrator point for the intracellular communication between the nucleus and the cytoplasm in cardiac muscle. We investigated the involvement of desmin in the cardiomyopathy caused by the lamin A/C gene mutation using the LmnaH222P/H222P mouse model of the disease. We demonstrate that in these mouse hearts desmin loses its normal Z disk and intercalated disc localization and presents aggregate formation along with mislocalization of basic intercalated disc protein components, as well as severe structural abnormalities of the intercalated discs and mitochondria. To address the extent by which the observed desmin network defects contribute to the progression of LmnaH222P/H222P cardiomyopathy, we investigated the consequences of desmin-targeted approaches for the disease treatment. We showed that cardiac-specific overexpression of the small heat shock protein αΒ-Crystallin confers cardioprotection in LmnaH222P/H222P mice by ameliorating desmin network defects and by attenuating the desmin-dependent mislocalization of basic intercalated disc protein components. In addition, αΒ-Crystallin overexpression rescues the intercalated disc, mitochondrial and nuclear defects of LmnaH222P/H222P hearts, as well as the abnormal activation of ERK1/2. Consistent with that, by generating the LmnaH222P/H222PDes+/- mice, we showed that the genetically decreased endogenous desmin levels have cardioprotective effects in LmnaH222P/H222P hearts since less desmin is available to form dysfunctional aggregates. In conclusion, our results demonstrate that desmin network disruption, disorganization of intercalated discs and mitochondrial defects are a major mechanism contributing to the progression of this LMNA cardiomyopathy and can be ameliorated by αΒ-Crystallin overexpression.
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Affiliation(s)
- Zoi Galata
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ismini Kloukina
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Ioanna Kostavasili
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Aimilia Varela
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Constantinos H Davos
- Center of Clinical, Experimental Surgery & Translational Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Manousos Makridakis
- Center of Systems Biology, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece
| | - Gisѐle Bonne
- Sorbonne Université, INSERM UMRS-974, Center for Research in Myology, Institut de Myologie, G.H. Pitié Salpêtrière, F-75651 Paris Cedex 13, France
| | - Yassemi Capetanaki
- Center of Basic Research, Biomedical Research Foundation, Academy of Athens, Athens 11527, Greece.
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13
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Thorolfsdottir RB, Sveinbjornsson G, Sulem P, Nielsen JB, Jonsson S, Halldorsson GH, Melsted P, Ivarsdottir EV, Davidsson OB, Kristjansson RP, Thorleifsson G, Helgadottir A, Gretarsdottir S, Norddahl G, Rajamani S, Torfason B, Valgardsson AS, Sverrisson JT, Tragante V, Holmen OL, Asselbergs FW, Roden DM, Darbar D, Pedersen TR, Sabatine MS, Willer CJ, Løchen ML, Halldorsson BV, Jonsdottir I, Hveem K, Arnar DO, Thorsteinsdottir U, Gudbjartsson DF, Holm H, Stefansson K. Coding variants in RPL3L and MYZAP increase risk of atrial fibrillation. Commun Biol 2018; 1:68. [PMID: 30271950 PMCID: PMC6123807 DOI: 10.1038/s42003-018-0068-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 05/11/2018] [Indexed: 12/29/2022] Open
Abstract
Most sequence variants identified hitherto in genome-wide association studies (GWAS) of atrial fibrillation are common, non-coding variants associated with risk through unknown mechanisms. We performed a meta-analysis of GWAS of atrial fibrillation among 29,502 cases and 767,760 controls from Iceland and the UK Biobank with follow-up in samples from Norway and the US, focusing on low-frequency coding and splice variants aiming to identify causal genes. We observe associations with one missense (OR = 1.20) and one splice-donor variant (OR = 1.50) in RPL3L, the first ribosomal gene implicated in atrial fibrillation to our knowledge. Analysis of 167 RNA samples from the right atrium reveals that the splice-donor variant in RPL3L results in exon skipping. We also observe an association with a missense variant in MYZAP (OR = 1.38), encoding a component of the intercalated discs of cardiomyocytes. Both discoveries emphasize the close relationship between the mechanical and electrical function of the heart.
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Affiliation(s)
- Rosa B Thorolfsdottir
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | | | | | - Jonas B Nielsen
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
| | | | | | - Pall Melsted
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- School of Engineering and Natural Sciences, University of Iceland, Reykjavik, Iceland
| | | | | | | | | | | | | | | | | | - Bjarni Torfason
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of Cardiothoracic Surgery, Landspitali University Hospital, Reykjavik, Iceland
| | - Atli S Valgardsson
- Department of Cardiothoracic Surgery, Landspitali University Hospital, Reykjavik, Iceland
| | - Jon T Sverrisson
- Department of Medicine, Akureyri Regional Hospital, Akureyri, Iceland
| | - Vinicius Tragante
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
| | - Oddgeir L Holmen
- HUNT Research Centre, Department of Public Health and General Practice, Norwegian University of Science and Technology, Levanger, Norway
- K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Cardiology, St. Olav's University Hospital, Trondheim, Norway
| | - Folkert W Asselbergs
- Department of Cardiology, Division Heart & Lungs, University Medical Center Utrecht, University of Utrecht, Utrecht, The Netherlands
- Durrer Center for Cardiovascular Research, Netherlands Heart Institute, Utrecht, The Netherlands
- Institute of Cardiovascular Science, Faculty of Population Health Sciences, University College London, London, UK
- Farr Institute of Health Informatics Research and Institute of Health Informatics, University College London, London, UK
| | - Dan M Roden
- Departments of Medicine, Pharmacology, and Biomedical Informatics, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Dawood Darbar
- Division of Cardiology, Department of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Terje R Pedersen
- Center For Preventive Medicine, Oslo University Hospital and Medical Faculty, University of Oslo, Oslo, Norway
| | - Marc S Sabatine
- TIMI Study Group, Division of Cardiovascular Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Cristen J Willer
- Department of Internal Medicine, Division of Cardiovascular Medicine, University of Michigan, Ann Arbor, MI, USA
- Department of Human Genetics, University of Michigan, Ann Arbor, MI, USA
- Department of Computational Medicine and Bioinformatics, University of Michigan, Ann Arbor, MI, USA
| | - Maja-Lisa Løchen
- Department of Community Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Bjarni V Halldorsson
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- Reykjavik University, Reykjavik, Iceland
| | - Ingileif Jonsdottir
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of immunology, Landspitali University Hospital, Reykjavik, Iceland
| | - Kristian Hveem
- HUNT Research Centre, Department of Public Health and General Practice, Norwegian University of Science and Technology, Levanger, Norway
- K.G. Jebsen Center for Genetic Epidemiology, Department of Public Health, Norwegian University of Science and Technology, Trondheim, Norway
- Department of Medicine, Levanger Hospital, Nord-Trøndelag Hospital Trust, Levanger, Norway
| | - David O Arnar
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
- Department of Medicine, Landspitali University Hospital, Reykjavik, Iceland
| | - Unnur Thorsteinsdottir
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Daniel F Gudbjartsson
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland
- School of Engineering and Natural Sciences, University of Iceland, Reykjavik, Iceland
| | - Hilma Holm
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland.
| | - Kari Stefansson
- deCODE genetics/Amgen, Inc., Reykjavik, Iceland.
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland.
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14
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Proteomic analyses of brain tumor cell lines amidst the unfolded protein response. Oncotarget 2018; 7:47831-47847. [PMID: 27323862 PMCID: PMC5216982 DOI: 10.18632/oncotarget.10032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 05/23/2016] [Indexed: 01/08/2023] Open
Abstract
Brain tumors such as high grade gliomas are among the deadliest forms of human cancers. The tumor environment is subject to a number of cellular stressors such as hypoxia and glucose deprivation. The persistence of the stressors activates the unfolded proteins response (UPR) and results in global alterations in transcriptional and translational activity of the cell. Although the UPR is known to effect tumorigenesis in some epithelial cancers, relatively little is known about the role of the UPR in brain tumors. Here, we evaluated the changes at the molecular level under homeostatic and stress conditions in two glioma cell lines of differing tumor grade. Using mass spectrometry analysis, we identified proteins unique to each condition (unstressed/stressed) and within each cell line (U87MG and UPN933). Comparing the two, we find differences between both the conditions and cell lines indicating a unique profile for each. Finally, we used our proteomic data to identify the predominant pathways within these cells under unstressed and stressed conditions. Numerous predominant pathways are the same in both cell lines, but there are differences in biological and molecular classifications of the identified proteins, including signaling mechanisms, following UPR induction; we see that relatively minimal proteomic alterations can lead to signaling changes that ultimately promote cell survival.
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15
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Macroautophagy and Chaperone-Mediated Autophagy in Heart Failure: The Known and the Unknown. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:8602041. [PMID: 29576856 PMCID: PMC5822756 DOI: 10.1155/2018/8602041] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 11/22/2017] [Indexed: 02/04/2023]
Abstract
Cardiac diseases including hypertrophic and ischemic cardiomyopathies are increasingly being reported to accumulate misfolded proteins and damaged organelles. These findings have led to an increasing interest in protein degradation pathways, like autophagy, which are essential not only for normal protein turnover but also in the removal of misfolded and damaged proteins. Emerging evidence suggests a previously unprecedented role for autophagic processes in cardiac physiology and pathology. This review focuses on the major types of autophagic processes, the genes and protein complexes involved, and their regulation. It discusses the key similarities and differences between macroautophagy, chaperone-mediated autophagy, and selective mitophagy structures and functions. The genetic models available to study loss and gain of macroautophagy, mitophagy, and CMA are discussed. It defines the markers of autophagic processes, methods for measuring autophagic activities, and their interpretations. This review then summarizes the major studies of autophagy in the heart and their contribution to cardiac pathology. Some reports suggest macroautophagy imparts cardioprotection from heart failure pathology. Meanwhile, other studies find macroautophagy activation may be detrimental in cardiac pathology. An improved understanding of autophagic processes and their regulation may lead to a new genre of treatments for cardiac diseases.
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16
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Diguet N, Trammell SAJ, Tannous C, Deloux R, Piquereau J, Mougenot N, Gouge A, Gressette M, Manoury B, Blanc J, Breton M, Decaux JF, Lavery GG, Baczkó I, Zoll J, Garnier A, Li Z, Brenner C, Mericskay M. Nicotinamide Riboside Preserves Cardiac Function in a Mouse Model of Dilated Cardiomyopathy. Circulation 2017; 137:2256-2273. [PMID: 29217642 DOI: 10.1161/circulationaha.116.026099] [Citation(s) in RCA: 215] [Impact Index Per Article: 30.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 11/06/2017] [Indexed: 01/03/2023]
Abstract
BACKGROUND Myocardial metabolic impairment is a major feature in chronic heart failure. As the major coenzyme in fuel oxidation and oxidative phosphorylation and a substrate for enzymes signaling energy stress and oxidative stress response, nicotinamide adenine dinucleotide (NAD+) is emerging as a metabolic target in a number of diseases including heart failure. Little is known on the mechanisms regulating homeostasis of NAD+ in the failing heart. METHODS To explore possible alterations of NAD+ homeostasis in the failing heart, we quantified the expression of NAD+ biosynthetic enzymes in the human failing heart and in the heart of a mouse model of dilated cardiomyopathy (DCM) triggered by Serum Response Factor transcription factor depletion in the heart (SRFHKO) or of cardiac hypertrophy triggered by transverse aorta constriction. We studied the impact of NAD+ precursor supplementation on cardiac function in both mouse models. RESULTS We observed a 30% loss in levels of NAD+ in the murine failing heart of both DCM and transverse aorta constriction mice that was accompanied by a decrease in expression of the nicotinamide phosphoribosyltransferase enzyme that recycles the nicotinamide precursor, whereas the nicotinamide riboside kinase 2 (NMRK2) that phosphorylates the nicotinamide riboside precursor is increased, to a higher level in the DCM (40-fold) than in transverse aorta constriction (4-fold). This shift was also observed in human failing heart biopsies in comparison with nonfailing controls. We show that the Nmrk2 gene is an AMP-activated protein kinase and peroxisome proliferator-activated receptor α responsive gene that is activated by energy stress and NAD+ depletion in isolated rat cardiomyocytes. Nicotinamide riboside efficiently rescues NAD+ synthesis in response to FK866-mediated inhibition of nicotinamide phosphoribosyltransferase and stimulates glycolysis in cardiomyocytes. Accordingly, we show that nicotinamide riboside supplementation in food attenuates the development of heart failure in mice, more robustly in DCM, and partially after transverse aorta constriction, by stabilizing myocardial NAD+ levels in the failing heart. Nicotinamide riboside treatment also robustly increases the myocardial levels of 3 metabolites, nicotinic acid adenine dinucleotide, methylnicotinamide, and N1-methyl-4-pyridone-5-carboxamide, that can be used as validation biomarkers for the treatment. CONCLUSIONS The data show that nicotinamide riboside, the most energy-efficient among NAD precursors, could be useful for treatment of heart failure, notably in the context of DCM, a disease with few therapeutic options.
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Affiliation(s)
- Nicolas Diguet
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.)
| | - Samuel A J Trammell
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City (S.A.J.T., C.B.)
| | - Cynthia Tannous
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.).,Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | - Robin Deloux
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.).,Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | | | - Nathalie Mougenot
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Plateforme PECMV, UMS28, Paris, France (N.M.)
| | - Anne Gouge
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.)
| | - Mélanie Gressette
- Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | - Boris Manoury
- Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | - Jocelyne Blanc
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.).,Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | - Marie Breton
- Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | - Jean-François Decaux
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.)
| | - Gareth G Lavery
- Institute of Metabolism and Systems Research, University of Birmingham, United Kingdom (G.G.L.)
| | - István Baczkó
- Department of Pharmacology and Pharmacotherapy, University of Szeged, Hungary (I.B.)
| | - Joffrey Zoll
- Physiology Department, Faculty of Medicine and EA3072, Université de Strasbourg, France (J.Z.)
| | - Anne Garnier
- Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.)
| | - Zhenlin Li
- Sorbonne Universités, Université Pierre et Marie Curie Paris 6, Department of Biology of Adaptation and Ageing, CNRS UMR8256, INSERM U1164, Institute of Biology Paris-Seine, DHU FAST, France (N.D., C.T., R.D., A. Gouge, J.B., J.-F.D., Z.L.)
| | - Charles Brenner
- Department of Biochemistry, Carver College of Medicine, University of Iowa, Iowa City (S.A.J.T., C.B.)
| | - Mathias Mericskay
- Signalling and Cardiovascular Pathophysiology, UMR-S 1180, University Paris-Sud, INSERM, Université Paris- Saclay, Châtenay-Malabry, France (C.T., R.D., J.P., M.G., B.M., M.B., A. Garnier, M.M.).
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17
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Li X, Huang W, He B, Zhou L, Huang X, Yao B. Role of blocking ADAM10 hydrolysis site on N-cadherin by single-chain antibody in ventricular remodeling. Exp Ther Med 2017; 14:4215-4223. [PMID: 29067106 PMCID: PMC5647691 DOI: 10.3892/etm.2017.5057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 06/02/2017] [Indexed: 11/15/2022] Open
Abstract
The present study aimed to investigate the roles of the hydrolytic process of N-cadherin by A disintegrin and metalloproteases 10 (ADAM10) in sustaining myocardial structure and integrity, and discuss the mechanisms of ventricular remodeling in dilated cardiomyopathy (DCM). Single chain variable fragment antibody (ScFv) with the ability to specifically block the ADAM10 hydrolysis site of N-cadherin was designed and constructed. Western blot analysis and flow cytometry were used to detect the expression of N-cadherin and its C-terminal fragment 1 (CTF1) on cardiomyocytes, and cells were also subjected to a cell adhesion assay. Furthermore, in a rat model of dilated cardiomyopathy (DCM), the effects of intracardiac injection of the recombinant adenovirus on cardiac structure and contractile function were observed by hematoxylin and eosin staining and color Doppler echocardiography. The recombinant ScFv-expressing adenoviral plasmid with the ability to block the ADAM10 hydrolysis site on N-cadherin was successfully constructed and efficiently transfected into H9C2 cells. After transfection, N-cadherin protein expression was significantly increased, CTF1 protein was significantly decreased and the adhesion capability of myocardial cells was significantly improved. In the in vivo experiment, N-cadherin expression was significantly increased in the treatment group compared with that in the model group, and the structure and function of the heart were significantly improved. In conclusion, blocking of the ADAM10 hydrolysis site on N-cadherin by ScFv increased N-cadherin expression and improved ventricular remodeling. The present study provided experimental evidence for a novel approach for the treatment and prevention of DCM.
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Affiliation(s)
- Xiaoou Li
- Department of Pediatrics, Renmin Hospital, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Wei Huang
- Department of Preclinical Medicine, Wuhan Institute of Medical Sciences, Wuhan, Hubei 430014, P.R. China
| | - Bing He
- Department of Pediatrics, Renmin Hospital, Wuhan University, Wuhan, Hubei 430060, P.R. China
| | - Lirong Zhou
- Department of Preclinical Medicine, Wuhan Institute of Medical Sciences, Wuhan, Hubei 430014, P.R. China
| | - Xiaogang Huang
- Department of Preclinical Medicine, Wuhan Institute of Medical Sciences, Wuhan, Hubei 430014, P.R. China
| | - Baozhen Yao
- Department of Pediatrics, Renmin Hospital, Wuhan University, Wuhan, Hubei 430060, P.R. China
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18
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Rangrez AY, Hoppe P, Kuhn C, Zille E, Frank J, Frey N, Frank D. MicroRNA miR-301a is a novel cardiac regulator of Cofilin-2. PLoS One 2017; 12:e0183901. [PMID: 28886070 PMCID: PMC5590826 DOI: 10.1371/journal.pone.0183901] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Accepted: 08/10/2017] [Indexed: 12/19/2022] Open
Abstract
Calsarcin-1 deficient mice develop dilated cardiomyopathy (DCM) phenotype in pure C57BL/6 genetic background (Cs1-ko) despite severe contractile dysfunction and robust activation of fetal gene program. Here we performed a microRNA microarray to identify the molecular causes of this cardiac phenotype that revealed the dysregulation of several microRNAs including miR-301a, which was highly downregulated in Cs1-ko mice compared to the wild-type littermates. Cofilin-2 (Cfl2) was identified as one of the potential targets of miR-301a using prediction databases, which we validated by luciferase assay and mutation of predicted binding sites. Furthermore, expression of miR-301a contrastingly regulated Cfl2 expression levels in neonatal rat ventricular cardiomyocytes (NRVCM). Along these lines, Cfl2 was significantly upregulated in Cs1-ko mice, indicating the physiological association between miR-301a and Cfl2 in vivo. Mechanistically, we found that Cfl2 activated serum response factor response element (SRF-RE) driven luciferase activity in neonatal rat cardiomyocytes and in C2C12 cells. Similarly, knockdown of miR301a activated, whereas, its overexpression inhibited the SRF-RE driven luciferase activity, further strengthening physiological interaction between miR-301a and Cfl2. Interestingly, the expression of SRF and its target genes was strikingly increased in Cs1-ko suggesting a possible in vivo correlation between expression levels of Cfl2/miR-301a and SRF activation, which needs to be independently validated. In summary, our data demonstrates that miR-301a regulates Cofilin-2 in vitro in NRVCM, and in vivo in Cs1-ko mice. Our findings provide an additional and important layer of Cfl2 regulation, which we believe has an extended role in cardiac signal transduction and dilated cardiomyopathy presumably due to the reported involvement of Cfl2 in these mechanisms.
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Affiliation(s)
- Ashraf Yusuf Rangrez
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Phillip Hoppe
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
| | - Christian Kuhn
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Elisa Zille
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
| | - Johanne Frank
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
| | - Norbert Frey
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Derk Frank
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Kiel, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
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19
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Borlepawar A, Rangrez AY, Bernt A, Christen L, Sossalla S, Frank D, Frey N. TRIM24 protein promotes and TRIM32 protein inhibits cardiomyocyte hypertrophy via regulation of dysbindin protein levels. J Biol Chem 2017; 292:10180-10196. [PMID: 28465353 PMCID: PMC5473223 DOI: 10.1074/jbc.m116.752543] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Revised: 04/28/2017] [Indexed: 12/27/2022] Open
Abstract
We have previously shown that dysbindin is a potent inducer of cardiomyocyte hypertrophy via activation of Rho-dependent serum-response factor (SRF) signaling. We have now performed a yeast two-hybrid screen using dysbindin as bait against a cardiac cDNA library to identify the cardiac dysbindin interactome. Among several putative binding proteins, we identified tripartite motif-containing protein 24 (TRIM24) and confirmed this interaction by co-immunoprecipitation and co-immunostaining. Another tripartite motif (TRIM) family protein, TRIM32, has been reported earlier as an E3 ubiquitin ligase for dysbindin in skeletal muscle. Consistently, we found that TRIM32 also degraded dysbindin in neonatal rat ventricular cardiomyocytes as well. Surprisingly, however, TRIM24 did not promote dysbindin decay but rather protected dysbindin against degradation by TRIM32. Correspondingly, TRIM32 attenuated the activation of SRF signaling and hypertrophy due to dysbindin, whereas TRIM24 promoted these effects in neonatal rat ventricular cardiomyocytes. This study also implies that TRIM32 is a key regulator of cell viability and apoptosis in cardiomyocytes via simultaneous activation of p53 and caspase-3/-7 and inhibition of X-linked inhibitor of apoptosis. In conclusion, we provide here a novel mechanism of post-translational regulation of dysbindin and hypertrophy via TRIM24 and TRIM32 and show the importance of TRIM32 in cardiomyocyte apoptosis in vitro.
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MESH Headings
- Animals
- Animals, Newborn
- Apoptosis
- Cardiomyopathy, Dilated/metabolism
- Cardiomyopathy, Dilated/pathology
- Cardiomyopathy, Hypertrophic/metabolism
- Cardiomyopathy, Hypertrophic/pathology
- Carrier Proteins/antagonists & inhibitors
- Carrier Proteins/genetics
- Carrier Proteins/metabolism
- Cells, Cultured
- Dysbindin
- Dystrophin-Associated Proteins/chemistry
- Dystrophin-Associated Proteins/genetics
- Dystrophin-Associated Proteins/metabolism
- HEK293 Cells
- Humans
- Myocytes, Cardiac/cytology
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Peptide Fragments/chemistry
- Peptide Fragments/genetics
- Peptide Fragments/metabolism
- Protein Stability
- Proteolysis
- RNA Interference
- Rats
- Rats, Wistar
- Recombinant Fusion Proteins/chemistry
- Recombinant Fusion Proteins/metabolism
- Recombinant Proteins/chemistry
- Recombinant Proteins/metabolism
- Serum Response Factor/agonists
- Serum Response Factor/antagonists & inhibitors
- Serum Response Factor/genetics
- Serum Response Factor/metabolism
- Signal Transduction
- Transcription Factors/antagonists & inhibitors
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Tripartite Motif Proteins/antagonists & inhibitors
- Tripartite Motif Proteins/genetics
- Tripartite Motif Proteins/metabolism
- Ubiquitin-Protein Ligases/antagonists & inhibitors
- Ubiquitin-Protein Ligases/genetics
- Ubiquitin-Protein Ligases/metabolism
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Affiliation(s)
- Ankush Borlepawar
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
- the DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Ashraf Yusuf Rangrez
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
- the DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Alexander Bernt
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
- the DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Lynn Christen
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
| | - Samuel Sossalla
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
- the DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Derk Frank
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
- the DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Norbert Frey
- From the Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel and
- the DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
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20
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Simonson B, Subramanya V, Chan MC, Zhang A, Franchino H, Ottaviano F, Mishra MK, Knight AC, Hunt D, Ghiran I, Khurana TS, Kontaridis MI, Rosenzweig A, Das S. DDiT4L promotes autophagy and inhibits pathological cardiac hypertrophy in response to stress. Sci Signal 2017; 10:10/468/eaaf5967. [PMID: 28246202 DOI: 10.1126/scisignal.aaf5967] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Physiological cardiac hypertrophy, in response to stimuli such as exercise, is considered adaptive and beneficial. In contrast, pathological cardiac hypertrophy that arises in response to pathological stimuli such as unrestrained high blood pressure and oxidative or metabolic stress is maladaptive and may precede heart failure. We found that the transcript encoding DNA damage-inducible transcript 4-like (DDiT4L) was expressed in murine models of pathological cardiac hypertrophy but not in those of physiological cardiac hypertrophy. In cardiomyocytes, DDiT4L localized to early endosomes and promoted stress-induced autophagy through a process involving mechanistic target of rapamycin complex 1 (mTORC1). Exposing cardiomyocytes to various types of pathological stress increased the abundance of DDiT4L, which inhibited mTORC1 but activated mTORC2 signaling. Mice with conditional cardiac-specific overexpression of DDiT4L had mild systolic dysfunction, increased baseline autophagy, reduced mTORC1 activity, and increased mTORC2 activity, all of which were reversed by suppression of transgene expression. Genetic suppression of autophagy also reversed cardiac dysfunction in these mice. Our data showed that DDiT4L may be an important transducer of pathological stress to autophagy through mTOR signaling in the heart and that DDiT4L could be therapeutically targeted in cardiovascular diseases in which autophagy and mTOR signaling play a major role.
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Affiliation(s)
- Bridget Simonson
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Vinita Subramanya
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Mun Chun Chan
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Aifeng Zhang
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Hannabeth Franchino
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Filomena Ottaviano
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Manoj K Mishra
- Department of Physiology, Pennsylvania Muscle Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Ashley C Knight
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Danielle Hunt
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Ionita Ghiran
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Tejvir S Khurana
- Department of Physiology, Pennsylvania Muscle Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Maria I Kontaridis
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Anthony Rosenzweig
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Saumya Das
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA. .,Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
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21
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Rangrez AY, Pott J, Kluge A, Frauen R, Stiebeling K, Hoppe P, Sossalla S, Frey N, Frank D. Myeloid leukemia factor-1 is a novel modulator of neonatal rat cardiomyocyte proliferation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1864:634-644. [PMID: 28087342 DOI: 10.1016/j.bbamcr.2017.01.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 01/03/2017] [Accepted: 01/06/2017] [Indexed: 10/20/2022]
Abstract
The present study focuses on the identification of the gene expression profile of neonatal rat cardiomyocytes (NRVCMs) after dynamic mechanical stretch through microarrays of RNA isolated from cells stretched for 2, 6 or 24h. In this analysis, myeloid leukemia factor-1 (MLF1) was found to be significantly downregulated during the course of stretch. We found that MLF1 is highly expressed in the heart, however, its cardiac function is unknown yet. In line with microarray data, MLF1 was profoundly downregulated in in vivo mouse models of cardiomyopathy, and also significantly reduced in the hearts of human patients with dilated cardiomyopathy. Our data indicates that the overexpression of MLF1 in NRVCMs inhibited cell proliferation while augmenting apoptosis. Conversely, knockdown of MLF1 protected NRVCMs from apoptosis and promoted cell proliferation. Moreover, we found that knockdown of MLF1 protected NRVCMs from hypoxia-induced cell death. The observed accelerated apoptosis is attributed to the activation of caspase-3/-7/PARP-dependent apoptotic signaling and upregulation of p53. Most interestingly, MLF1 knockdown significantly upregulated the expression of D cyclins suggesting its possible role in cyclin-dependent cell proliferation. Taken together, we, for the first time, identified an important role for MLF1 in NRVCM proliferation.
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Affiliation(s)
- Ashraf Yusuf Rangrez
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Jost Pott
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany
| | - Annika Kluge
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany
| | - Robert Frauen
- University Medical Center Eppendorf, 20246 Hamburg, Germany
| | - Katharina Stiebeling
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany
| | - Phillip Hoppe
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany
| | - Samuel Sossalla
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Norbert Frey
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Derk Frank
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany.
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22
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Rangrez AY, Eden M, Poyanmehr R, Kuhn C, Stiebeling K, Dierck F, Bernt A, Lüllmann-Rauch R, Weiler H, Kirchof P, Frank D, Frey N. Myozap Deficiency Promotes Adverse Cardiac Remodeling via Differential Regulation of Mitogen-activated Protein Kinase/Serum-response Factor and β-Catenin/GSK-3β Protein Signaling. J Biol Chem 2015; 291:4128-43. [PMID: 26719331 DOI: 10.1074/jbc.m115.689620] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Indexed: 01/22/2023] Open
Abstract
The intercalated disc (ID) is a "hot spot" for heart disease, as several ID proteins have been found mutated in cardiomyopathy. Myozap is a recent addition to the list of ID proteins and has been implicated in serum-response factor signaling. To elucidate the cardiac consequences of targeted deletion of myozap in vivo, we generated myozap-null mutant (Mzp(-/-)) mice. Although Mzp(-/-) mice did not exhibit a baseline phenotype, increased biomechanical stress due to pressure overload led to accelerated cardiac hypertrophy, accompanied by "super"-induction of fetal genes, including natriuretic peptides A and B (Nppa/Nppb). Moreover, Mzp(-/-) mice manifested a severe reduction of contractile function, signs of heart failure, and increased mortality. Expression of other ID proteins like N-cadherin, desmoplakin, connexin-43, and ZO-1 was significantly perturbed upon pressure overload, underscored by disorganization of the IDs in Mzp(-/-) mice. Exploration of the molecular causes of enhanced cardiac hypertrophy revealed significant activation of β-catenin/GSK-3β signaling, whereas MAPK and MKL1/serum-response factor pathways were inhibited. In summary, myozap is required for proper adaptation to increased biomechanical stress. In broader terms, our data imply an essential function of the ID in cardiac remodeling beyond a mere structural role and emphasize the need for a better understanding of this molecular structure in the context of heart disease.
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Affiliation(s)
- Ashraf Yusuf Rangrez
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Matthias Eden
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Reza Poyanmehr
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Christian Kuhn
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Katharina Stiebeling
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Franziska Dierck
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Alexander Bernt
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Renate Lüllmann-Rauch
- German Centre for Cardiovascular Research (DZHK, partner site Hamburg/Kiel/Lübeck), University Medical Center Schleswig-Holstein, Kiel D-24105, Germany
| | - Hartmut Weiler
- the Anatomical Institute, Christian Albrechts University of Kiel, Kiel D-24098, Germany
| | - Paulus Kirchof
- the Blood Research Institute, Blood Center of Wisconsin, Milwaukee, Wisconsin 53233, and
| | - Derk Frank
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
| | - Norbert Frey
- From the Department of Internal Medicine III, Molecular Cardiology and Angiology, and
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23
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Rampazzo A, Calore M, van Hengel J, van Roy F. Intercalated Discs and Arrhythmogenic Cardiomyopathy. ACTA ACUST UNITED AC 2014; 7:930-40. [DOI: 10.1161/circgenetics.114.000645] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Alessandra Rampazzo
- From the Department of Biology, University of Padua, Padua, Italy (A.R., M.C.); Molecular Cell Biology Unit, Inflammation Research Center (IRC), VIB-Ghent University, Ghent, Belgium (J.v.H., F.v.R.); and Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium (J.v.H., F.v.R.)
| | - Martina Calore
- From the Department of Biology, University of Padua, Padua, Italy (A.R., M.C.); Molecular Cell Biology Unit, Inflammation Research Center (IRC), VIB-Ghent University, Ghent, Belgium (J.v.H., F.v.R.); and Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium (J.v.H., F.v.R.)
| | - Jolanda van Hengel
- From the Department of Biology, University of Padua, Padua, Italy (A.R., M.C.); Molecular Cell Biology Unit, Inflammation Research Center (IRC), VIB-Ghent University, Ghent, Belgium (J.v.H., F.v.R.); and Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium (J.v.H., F.v.R.)
| | - Frans van Roy
- From the Department of Biology, University of Padua, Padua, Italy (A.R., M.C.); Molecular Cell Biology Unit, Inflammation Research Center (IRC), VIB-Ghent University, Ghent, Belgium (J.v.H., F.v.R.); and Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium (J.v.H., F.v.R.)
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