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Cao K, Zhu Y, Kuai Y, Chen B, Zhao Q, Yu W. Macrophage MKL1 contributes to cardiac fibrosis in a mouse model of myocardial infarction. Life Sci 2024; 356:123036. [PMID: 39222836 DOI: 10.1016/j.lfs.2024.123036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 08/29/2024] [Accepted: 08/30/2024] [Indexed: 09/04/2024]
Abstract
AIMS Cardiac fibrosis is characterized by aberrant collagen deposition in the heart. Macrophage polarization or infiltration is the main reason to accelerate the collagen deposition. We attempted to investigate the involvement of MKL1 in macrophages during the development of cardiac fibrosis. MATERIALS AND METHODS Cardiac fibrosis is induced by myocardial infarction (MI). The MKL1f/f mice were crossed to the Lyz2-cre mice to generate macrophage conditional MKL1 knockout mice (MKL1ΔMφ). In addition, macrophage conditional MKL1 overexpression mice (MKL1Mϕ-OE) were constructed by crossing Lyz2-cre mice to MKL1ΔN200-Rosa26 mice. KEY FINDINGS MKL1 expression was significantly increased in macrophages of both ischemic cardiomyopathy (ICM) patients and mice induced to develop myocardial infarction. Deletion of MKL1 in macrophages improved the heart function after MI-induced cardiac fibrosis. Consistently, MKL1Mϕ-OE mice displayed more severe cardiac fibrosis and worsened heart function than the control mice after MI. Moreover, administration of a small-molecule MKL1 inhibitor CCG-1423 also decreased the collagen deposition after MI. SIGNIFICANCE Our data demonstrate that MKL1 in macrophages contributes to cardiac fibrosis pathogenesis and reinforce the notion that targeting MKL1 may yield effective antifibrotic therapeutics in the heart.
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Affiliation(s)
- Ke Cao
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yuwen Zhu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yameng Kuai
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Baoyu Chen
- Department of Pathology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
| | - Qianwen Zhao
- Department of Infectious Diseases, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China; Department of Infectious Diseases, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, China.
| | - Wenkui Yu
- Department of Critical Care Medicine, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China.
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2
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Ochoa JP, Lalaguna L, Mirelis JG, Dominguez F, Gonzalez-Lopez E, Salas C, Roustan G, McGurk KA, Zheng SL, Barton PJ, Ware JS, Gómez-Gaviro MV, Lara-Pezzi E, Garcia-Pavia P. Biallelic Loss of Function Variants in Myocardial Zonula Adherens Protein Gene (MYZAP) Cause a Severe Recessive Form of Dilated Cardiomyopathy. Circ Heart Fail 2024; 17:e011226. [PMID: 38436102 PMCID: PMC10942163 DOI: 10.1161/circheartfailure.123.011226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/05/2024]
Affiliation(s)
- Juan Pablo Ochoa
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain (J.P.O., F.D., E.G.-L., C.S., E.L.-P., P.G.-P.)
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.P.O., L.L., F.D., E.G.-L., E.L.-P., P.G.-P.)
| | - Laura Lalaguna
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.P.O., L.L., F.D., E.G.-L., E.L.-P., P.G.-P.)
| | - Jesús G. Mirelis
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
| | - Fernando Dominguez
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain (J.P.O., F.D., E.G.-L., C.S., E.L.-P., P.G.-P.)
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.P.O., L.L., F.D., E.G.-L., E.L.-P., P.G.-P.)
| | - Esther Gonzalez-Lopez
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain (J.P.O., F.D., E.G.-L., C.S., E.L.-P., P.G.-P.)
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.P.O., L.L., F.D., E.G.-L., E.L.-P., P.G.-P.)
| | - Clara Salas
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain (J.P.O., F.D., E.G.-L., C.S., E.L.-P., P.G.-P.)
| | - Gaston Roustan
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
| | - Kathryn A. McGurk
- National Heart and Lung Institute (K.A.M, S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- MRC London Institute of Medical Sciences (K.A.M., S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
| | - Sean L. Zheng
- National Heart and Lung Institute (K.A.M, S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- MRC London Institute of Medical Sciences (K.A.M., S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- Royal Brompton and Harefield Hospitals, Guy’s and St Thomas’ Hospital NHS Trust, London, UK (S.L.Z., P.J.R.B., J.S.W.)
| | - Paul J.R. Barton
- National Heart and Lung Institute (K.A.M, S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- MRC London Institute of Medical Sciences (K.A.M., S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- Royal Brompton and Harefield Hospitals, Guy’s and St Thomas’ Hospital NHS Trust, London, UK (S.L.Z., P.J.R.B., J.S.W.)
| | - James S. Ware
- National Heart and Lung Institute (K.A.M, S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- MRC London Institute of Medical Sciences (K.A.M., S.L.Z., P.J.R.B., J.S.W.), Imperial College London, United Kingdom
- Royal Brompton and Harefield Hospitals, Guy’s and St Thomas’ Hospital NHS Trust, London, UK (S.L.Z., P.J.R.B., J.S.W.)
| | - María Victoria Gómez-Gaviro
- Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain (M.V.G.-G.)
- Centro de Investigación Biomédica en Red de Salud Mental, Madrid, Spain (M.V.G.-G.)
| | - Enrique Lara-Pezzi
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain (J.P.O., F.D., E.G.-L., C.S., E.L.-P., P.G.-P.)
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.P.O., L.L., F.D., E.G.-L., E.L.-P., P.G.-P.)
| | - Pablo Garcia-Pavia
- Hospital Universitario Puerta de Hierro Majadahonda, IDIPHISA, Madrid, Spain (J.P.O., J.G.M., F.D., E.G.-L., C.S., G.R., P.G.-P.)
- CIBERCV, Instituto de Salud Carlos III, Madrid, Spain (J.P.O., F.D., E.G.-L., C.S., E.L.-P., P.G.-P.)
- Centro Nacional de Investigaciones Cardiovasculares, Madrid, Spain (J.P.O., L.L., F.D., E.G.-L., E.L.-P., P.G.-P.)
- Universidad Francisco de Vitoria, Pozuelo de Alarcón, Spain (P.G.-P.)
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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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4
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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: 11] [Impact Index Per Article: 11.0] [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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5
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Podyacheva E, Toropova Y. SIRT1 activation and its effect on intercalated disc proteins as a way to reduce doxorubicin cardiotoxicity. Front Pharmacol 2022; 13:1035387. [PMID: 36408244 PMCID: PMC9672938 DOI: 10.3389/fphar.2022.1035387] [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: 09/02/2022] [Accepted: 10/25/2022] [Indexed: 11/06/2022] Open
Abstract
According to the World Health Organization, the neoplasm is one of the main reasons for morbidity and mortality worldwide. At the same time, application of cytostatic drugs like an independent type of cancer treatment and in combination with surgical methods, is often associated with the development of cardiovascular complications both in the early and in the delayed period of treatment. Doxorubicin (DOX) is the most commonly used cytotoxic anthracycline antibiotic. DOX can cause both acute and delayed side effects. The problem is still not solved, as evidenced by the continued activity of researchers in terms of developing approaches for the prevention and treatment of cardiovascular complications. It is known, the heart muscle consists of cardiomyocytes connected by intercalated discs (ID), which ensure the structural, electrical, metabolic unity of the heart. Various defects in the ID proteins can lead to the development of cardiovascular diseases of various etiologies, including DOX-induced cardiomyopathy. The search for ways to influence the functioning of ID proteins of the cardiac muscle can become the basis for the creation of new therapeutic approaches to the treatment and prevention of cardiac pathologies. SIRT1 may be an interesting cardioprotective variant due to its wide functional significance. SIRT1 activation triggers nuclear transcription programs that increase the efficiency of cellular, mitochondrial metabolism, increases resistance to oxidative stress, and promotes cell survival. It can be assumed that SIRT1 can not only provide a protective effect at the cardiomyocytes level, leading to an improvement in mitochondrial and metabolic functions, reducing the effects of oxidative stress and inflammatory processes, but also have a protective effect on the functioning of IDs structures of the cardiac muscle.
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6
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Maver A, Zigman T, Rangrez AY, Coric M, Homolak J, Saric D, Skific I, Udovicic M, Zekusic M, Saleem U, Laufer SD, Hansen A, Frey N, Baric I, Peterlin B. A biallelic loss-of-function variant in MYZAP is associated with a recessive form of severe dilated cardiomyopathy. Cold Spring Harb Mol Case Stud 2022; 8:mcs.a006221. [PMID: 35840178 PMCID: PMC9528970 DOI: 10.1101/mcs.a006221] [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] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 07/05/2022] [Indexed: 11/25/2022] Open
Abstract
PURPOSE Dilated cardiomyopathy (DCM) is a primary disorder of the cardiac muscle, characterised by dilatation of the left ventricle and contractile dysfunction. About 50% of DCM cases can be attributed to monogenic causes, whereas the aetiology in the remaining patients remains unexplained. METHODS We report a family with two brothers affected by severe DCM with onset in the adolescent period. Using exome sequencing, we identified a homozygous premature termination variant in the MYZAP gene in both affected sibs. MYZAP encodes for myocardial zonula adherens protein - a conserved cardiac protein in the intercalated disc structure of cardiomyocytes. RESULTS The effect of the variant was demonstrated by light and electron microscopy of the heart muscle and immunohistochemical and Western blot analysis of MYZAP protein in the heart tissue of the proband. Functional characterization using patient-derived induced pluripotent stem cell cardiomyocytes revealed significantly lower force and longer time to peak contraction and relaxation consistent with severe contractile dysfunction. CONCLUSION We provide independent support for the role of biallelic loss-of-function MYZAP variants in dilated cardiomyopathy. This report extends the spectrum of cardiac disease associated with dysfunction of cardiac intercalated disc junction and sheds light on the mechanisms leading to DCM.
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Affiliation(s)
- Ales Maver
- Clinical Institute of Medical Genetics, University Medical Centre Ljubljana, SI-1000 Ljubljana, Slovenia
| | - Tamara Zigman
- Department of Pediatrics, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Ashraf Yusuf Rangrez
- Department of Internal Medicine III, Cardiology and Angiology, University Medical Center Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Marijana Coric
- Clinical Department of Pathology and Cytology, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Jan Homolak
- Department of Pharmacology, School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Dalibor Saric
- Department of Pediatrics, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Iva Skific
- Department of Pathology, University Hospital Dubrava, Zagreb, Croatia
| | - Mario Udovicic
- Division of Cardiology, Department of Internal Medicine, University Hospital Dubrava, Zagreb
| | - Marija Zekusic
- Department of Transfusion and Regenerative Medicine, University Hospital Center Sestre milosrdnice, Zagreb, Croatia
| | - Umber Saleem
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Sandra D Laufer
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Arne Hansen
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Norbert Frey
- Department of Internal Medicine III (Cardiology, Angiology & Pulmology), University of Heidelberg, Germany
| | - Ivo Baric
- Department of Pediatrics, University Hospital Centre Zagreb, Zagreb, Croatia
| | - Borut Peterlin
- Clinical Institute of Medical Genetics, University Medical Centre Ljubljana, SI-1000 Ljubljana, Slovenia;
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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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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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9
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Kilian LS, Frank D, Rangrez AY. RhoA Signaling in Immune Cell Response and Cardiac Disease. Cells 2021; 10:1681. [PMID: 34359851 PMCID: PMC8306393 DOI: 10.3390/cells10071681] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/01/2021] [Accepted: 07/01/2021] [Indexed: 11/25/2022] Open
Abstract
Chronic inflammation, the activation of immune cells and their cross-talk with cardiomyocytes in the pathogenesis and progression of heart diseases has long been overlooked. However, with the latest research developments, it is increasingly accepted that a vicious cycle exists where cardiomyocytes release cardiocrine signaling molecules that spiral down to immune cell activation and chronic state of low-level inflammation. For example, cardiocrine molecules released from injured or stressed cardiomyocytes can stimulate macrophages, dendritic cells, neutrophils and even T-cells, which then subsequently increase cardiac inflammation by co-stimulation and positive feedback loops. One of the key proteins involved in stress-mediated cardiomyocyte signal transduction is a small GTPase RhoA. Importantly, the regulation of RhoA activation is critical for effective immune cell response and is being considered as one of the potential therapeutic targets in many immune-cell-mediated inflammatory diseases. In this review we provide an update on the role of RhoA at the juncture of immune cell activation, inflammation and cardiac disease.
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Affiliation(s)
- Lucia Sophie Kilian
- 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
| | - 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
- Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, 69120 Heidelberg, Germany
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10
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Kilian LS, Voran J, Frank D, Rangrez AY. RhoA: a dubious molecule in cardiac pathophysiology. J Biomed Sci 2021; 28:33. [PMID: 33906663 PMCID: PMC8080415 DOI: 10.1186/s12929-021-00730-w] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 04/23/2021] [Indexed: 02/08/2023] Open
Abstract
The Ras homolog gene family member A (RhoA) is the founding member of Rho GTPase superfamily originally studied in cancer cells where it was found to stimulate cell cycle progression and migration. RhoA acts as a master switch control of actin dynamics essential for maintaining cytoarchitecture of a cell. In the last two decades, however, RhoA has been coined and increasingly investigated as an essential molecule involved in signal transduction and regulation of gene transcription thereby affecting physiological functions such as cell division, survival, proliferation and migration. RhoA has been shown to play an important role in cardiac remodeling and cardiomyopathies; underlying mechanisms are however still poorly understood since the results derived from in vitro and in vivo experiments are still inconclusive. Interestingly its role in the development of cardiomyopathies or heart failure remains largely unclear due to anomalies in the current data available that indicate both cardioprotective and deleterious effects. In this review, we aimed to outline the molecular mechanisms of RhoA activation, to give an overview of its regulators, and the probable mechanisms of signal transduction leading to RhoA activation and induction of downstream effector pathways and corresponding cellular responses in cardiac (patho)physiology. Furthermore, we discuss the existing studies assessing the presented results and shedding light on the often-ambiguous data. Overall, we provide an update of the molecular, physiological and pathological functions of RhoA in the heart and its potential in cardiac therapeutics.
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Affiliation(s)
- Lucia Sophie Kilian
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Rosalind-Franklin Str. 12, 24105, Kiel, Germany.,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105, Kiel, Germany
| | - Jakob Voran
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Rosalind-Franklin Str. 12, 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, Rosalind-Franklin Str. 12, 24105, Kiel, Germany. .,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105, Kiel, Germany.
| | - Ashraf Yusuf Rangrez
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, Rosalind-Franklin Str. 12, 24105, Kiel, Germany. .,DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, 24105, Kiel, Germany. .,Department of Cardiology, Angiology and Pneumology, University Hospital Heidelberg, Im Neuenheimer Feld 410, 69120, Heidelberg, Germany.
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11
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Kuhn C, Menke M, Senger F, Mack C, Dierck F, Hille S, Schmidt I, Brunke G, Bünger P, Schmiedel N, Will R, Sossalla S, Frank D, Eschenhagen T, Carrier L, Lüllmann-Rauch R, Rangrez AY, Frey N. FYCO1 Regulates Cardiomyocyte Autophagy and Prevents Heart Failure Due to Pressure Overload In Vivo. JACC Basic Transl Sci 2021; 6:365-380. [PMID: 33997522 PMCID: PMC8093479 DOI: 10.1016/j.jacbts.2021.01.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Revised: 01/06/2021] [Accepted: 01/06/2021] [Indexed: 12/31/2022]
Abstract
FYCO1, a component of the autophagic machinery, is highly expressed in the heart and a potent inducer of cardiomyocyte autophagy. Loss of FYCO1 in vivo inhibits adaptation to starvation or biomechanical stress of the heart by an abrogated increase of autophagic flux and results in contractile dysfunction. Heart specific overexpression of FYCO1 improves autophagic flux and rescues contractile dysfunction following pressure overload.
Autophagy is a cellular degradation process that has been implicated in diverse disease processes. The authors provide evidence that FYCO1, a component of the autophagic machinery, is essential for adaptation to cardiac stress. Although the absence of FYCO1 does not affect basal autophagy in isolated cardiomyocytes, it abolishes induction of autophagy after glucose deprivation. Likewise, Fyco1-deficient mice subjected to starvation or pressure overload are unable to respond with induction of autophagy and develop impaired cardiac function. FYCO1 overexpression leads to induction of autophagy in isolated cardiomyocytes and transgenic mouse hearts, thereby rescuing cardiac dysfunction in response to biomechanical stress.
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Key Words
- BFA, bafilomycin A1
- CSA, cell surface area
- FYCO1
- GFP, green fluorescent protein
- KO, knockout
- MHC, myosin heavy chain
- NRCM, neonatal rat cardiomyocytes
- RFP, red fluorescent protein
- TAC, transverse aortic constriction
- TG, transgenic
- WT, wild-type
- autophagy
- heart failure
- mRNA, messenger ribonucleic acid
- microRNA, micro–ribonucleic acid
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Affiliation(s)
- Christian Kuhn
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Maja Menke
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Frauke Senger
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Claudia Mack
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, 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, Hamburg, Germany
| | - Inga Schmidt
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Gabriele Brunke
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Pia Bünger
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Nesrin Schmiedel
- Department of Internal Medicine III, University Medical Center of Schleswig-Holstein, Campus Kiel, Kiel, Germany
| | - Rainer Will
- Genomics and Proteomics Core Facility, DKFZ (German Cancer Research Center), Heidelberg, Germany
| | - Samuel Sossalla
- Department of Internal Medicine II, University Medical Center Regensburg, Regensburg, 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, Hamburg, Germany
| | - Thomas Eschenhagen
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | - Lucie Carrier
- DZHK (German Centre for Cardiovascular Research), partner site Hamburg/Kiel/Lübeck, Hamburg, Germany
- Department of Experimental Pharmacology and Toxicology, Cardiovascular Research Center, University Medical Center Hamburg Eppendorf, Hamburg, Germany
| | | | - Ashraf Yusuf Rangrez
- 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, Hamburg, 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
- Address for correspondence: Prof. Dr. Norbert Frey, Department of Cardiology, Angiology and Pneumology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.
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12
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Borlepawar A, Schmiedel N, Eden M, Christen L, Rosskopf A, Frank D, Lüllmann-Rauch R, Frey N, Rangrez AY. Dysbindin deficiency Alters Cardiac BLOC-1 Complex and Myozap Levels in Mice. Cells 2020; 9:cells9112390. [PMID: 33142804 PMCID: PMC7692170 DOI: 10.3390/cells9112390] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/30/2020] [Accepted: 10/30/2020] [Indexed: 11/16/2022] Open
Abstract
Dysbindin, a schizophrenia susceptibility marker and an essential constituent of BLOC-1 (biogenesis of lysosome-related organelles complex-1), has recently been associated with cardiomyocyte hypertrophy through the activation of Myozap-RhoA-mediated SRF signaling. We employed sandy mice (Dtnbp1_KO), which completely lack Dysbindin protein because of a spontaneous deletion of introns 5-7 of the Dtnbp1 gene, for pathophysiological characterization of the heart. Unlike in vitro, the loss-of-function of Dysbindin did not attenuate cardiac hypertrophy, either in response to transverse aortic constriction stress or upon phenylephrine treatment. Interestingly, however, the levels of hypertrophy-inducing interaction partner Myozap as well as the BLOC-1 partners of Dysbindin like Muted and Pallidin were dramatically reduced in Dtnbp1_KO mouse hearts. Taken together, our data suggest that Dysbindin's role in cardiomyocyte hypertrophy is redundant in vivo, yet essential to maintain the stability of its direct interaction partners like Myozap, Pallidin and Muted.
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Affiliation(s)
- Ankush Borlepawar
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Nesrin Schmiedel
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Matthias Eden
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Lynn Christen
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
| | - Alexandra Rosskopf
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- 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; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- 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; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
| | - Ashraf Yusuf Rangrez
- Department of Internal Medicine III (Cardiology, Angiology, Intensive Care), University Medical Center Kiel, 24105 Kiel, Germany; (A.B.); (N.S.); (M.E.); (L.C.); (A.R.); (D.F.); (N.F.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 24105 Kiel, Germany
- Correspondence: ; Tel.: +49-431-500-22966; Fax: +49-431-500-22938
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13
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The E3 ubiquitin ligase HectD3 attenuates cardiac hypertrophy and inflammation in mice. Commun Biol 2020; 3:562. [PMID: 33037313 PMCID: PMC7547098 DOI: 10.1038/s42003-020-01289-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 09/14/2020] [Indexed: 01/26/2023] Open
Abstract
Myocardial inflammation has recently been recognized as a distinct feature of cardiac hypertrophy and heart failure. HectD3, a HECT domain containing E3 ubiquitin ligase has previously been investigated in the host defense against infections as well as neuroinflammation; its cardiac function however is still unknown. Here we show that HectD3 simultaneously attenuates Calcineurin-NFAT driven cardiomyocyte hypertrophy and the pro-inflammatory actions of LPS/interferon-γ via its cardiac substrates SUMO2 and Stat1, respectively. AAV9-mediated overexpression of HectD3 in mice in vivo not only reduced cardiac SUMO2/Stat1 levels and pathological hypertrophy but also largely abolished macrophage infiltration and fibrosis induced by pressure overload. Taken together, we describe a novel cardioprotective mechanism involving the ubiquitin ligase HectD3, which links anti-hypertrophic and anti-inflammatory effects via dual regulation of SUMO2 and Stat1. In a broader perspective, these findings support the notion that cardiomyocyte growth and inflammation are more intertwined than previously anticipated. Rangrez et al. show that overexpression of the HECT domain E3 ubiquitin protein ligase 3 (HectD3) reduces cardiac hypertrophy while reducing macrophage infiltration in mice. This study provides a cardioprotective mechanism, where HectD3 targets SUMO2 and Stat1 to exert its anti-hypertrophic and anti-inflammatory effects.
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14
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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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15
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Lu Y, Lv F, Kong M, Chen X, Duan Y, Chen X, Sun D, Fang M, Xu Y. A cAbl-MRTF-A Feedback Loop Contributes to Hepatic Stellate Cell Activation. Front Cell Dev Biol 2019; 7:243. [PMID: 31681772 PMCID: PMC6805704 DOI: 10.3389/fcell.2019.00243] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Accepted: 10/03/2019] [Indexed: 12/13/2022] Open
Abstract
Trans-differentiation of quiescent hepatic stellate cells (HSC) to myofibroblasts is a hallmark event in liver fibrosis. Previous studies have led to the discovery that myocardin-related transcription factor A (MRTF-A) is a key regulator of HSC trans-differentiation or, activation. In the present study we investigated the interplay between MRTF-A and c-Abl (encoded by Abl1), a tyrosine kinase, in this process. We report that hepatic expression levels of c-Abl were down-regulated in MRTF-A knockout (KO) mice compared to wild type (WT) littermates in several different models of liver fibrosis. MRTF-A deficiency also resulted in c-Abl down-regulation in freshly isolated HSCs from the fibrotic livers of mice. MRTF-A knockdown or inhibition repressed c-Abl in cultured HSCs in vitro. Further analyses revealed that MRTF-A directly bound to the Abl1 promoter to activate transcription by interacting with Sp1. Reciprocally, pharmaceutical inhibition of c-Abl suppressed MRTF-A activity. Mechanistically, c-Abl activated extracellular signal-regulated kinase (ERK), which in turn phosphorylated MRTF-A and promoted MRTF-A nuclear trans-localization. In conclusion, our data suggest that a c-Abl-MRTF-A positive feedback loop contributes to HSC activation and liver fibrosis.
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Affiliation(s)
- Yunjie Lu
- Department of Hepatobiliary and Pancreatic Surgery, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Fangqiao Lv
- Department of Cell Biology, School of Basic Medical Sciences, Capital Medical University, Beijing, China
| | - Ming Kong
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Xuyang Chen
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China
| | - Yunfei Duan
- Department of Hepatobiliary and Pancreatic Surgery, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Xuemin Chen
- Department of Hepatobiliary and Pancreatic Surgery, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Donglin Sun
- Department of Hepatobiliary and Pancreatic Surgery, The First People's Hospital of Changzhou, The Third Affiliated Hospital of Soochow University, Changzhou, China
| | - Mingming Fang
- Institute of Biomedical Research, Liaocheng University, Liaocheng, China.,Department of Clinical Medicine and Laboratory Center for Experimental Medicine, Jiangsu Vocational College of Medicine, Nanjing, China
| | - Yong Xu
- Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, Department of Pathophysiology, Nanjing Medical University, Nanjing, China.,Institute of Biomedical Research, Liaocheng University, Liaocheng, China
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16
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Abreu-Velez AM, Upegui-Zapata YA, Valencia-Yepes CA, Upegui-Quiceno E, Jiménez-Echavarría AM, Niño-Pulido CD, Smoller BR, Howard MS. Involvement of the Areae Compositae of the Heart in Endemic Pemphigus Foliaceus. Dermatol Pract Concept 2019; 9:181-186. [PMID: 31384490 DOI: 10.5826/dpc.0903a02] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/14/2019] [Indexed: 12/11/2022] Open
Abstract
Background A new variant of endemic pemphigus foliaceus in El Bagre (El Bagre-EPF), Colombia, South America, shares features with Senear-Usher syndrome and occurs in an endemic fashion. Patients affected by El Bagre-EPF have heterogeneous antigenic reactivity not only to the skin but to other organs, including the heart. Here we test for autoantibodies to the areae compositae of the heart (structure consisting of typical desmosomal amalgamated fascia adherens molecules) and evaluate any possible clinical correlation. Methods A case-control study comparing 45 patients and 45 controls from the endemic area, matched by demographics including age, gender, weight, work activities, and comorbidities, was performed. Direct and indirect immunofluorescence, immunohistochemistry, confocal microscopic studies, and echocardiogram studies were completed. Results The main clinical abnormally seen in the El Bagre-EPF patients was left ventricular hypertrophy in 15/45 patients, compared with no such findings in the control population (P < 0.1). Seventy percent of El Bagre-EPF patients and none of the controls displayed polyclonal autoreactivity using different immunoglobulins and complement to the areae compositae of the heart using different methods and antibodies (P < 0.1). Conclusions Patients affected by El Bagre-EPF demonstrated autoantibodies to the areae compositae of the heart. This finding was associated with left ventricular hypertrophic cardiomyopathy. The areae compositae may play a role in cell junction tension and the El Bagre-EPF patients' autoantibodies possibly disrupting these junctions and thereby contributing to the left ventricular hypertrophy.
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Affiliation(s)
| | - Yulieth A Upegui-Zapata
- PECET Group, Pharmaceutical Sciences, Medical Research Institute, School of Medicine, University of Antioquia, Medellín, Colombia
| | | | | | | | | | - Bruce R Smoller
- Departments of Pathology and Laboratory Medicine & Dermatology, University of Rochester Medical Center, School of Medicine and Dentistry, Rochester, NY, USA
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17
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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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18
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Trembley MA, Quijada P, Agullo-Pascual E, Tylock KM, Colpan M, Dirkx RA, Myers JR, Mickelsen DM, de Mesy Bentley K, Rothenberg E, Moravec CS, Alexis JD, Gregorio CC, Dirksen RT, Delmar M, Small EM. Mechanosensitive Gene Regulation by Myocardin-Related Transcription Factors Is Required for Cardiomyocyte Integrity in Load-Induced Ventricular Hypertrophy. Circulation 2018; 138:1864-1878. [PMID: 29716942 PMCID: PMC6202206 DOI: 10.1161/circulationaha.117.031788] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Hypertrophic cardiomyocyte growth and dysfunction accompany various forms of heart disease. The mechanisms responsible for transcriptional changes that affect cardiac physiology and the transition to heart failure are not well understood. The intercalated disc (ID) is a specialized intercellular junction coupling cardiomyocyte force transmission and propagation of electrical activity. The ID is gaining attention as a mechanosensitive signaling hub and hotspot for causative mutations in cardiomyopathy. METHODS Transmission electron microscopy, confocal microscopy, and single-molecule localization microscopy were used to examine changes in ID structure and protein localization in the murine and human heart. We conducted detailed cardiac functional assessment and transcriptional profiling of mice lacking myocardin-related transcription factor (MRTF)-A and MRTF-B specifically in adult cardiomyocytes to evaluate the role of mechanosensitive regulation of gene expression in load-induced ventricular remodeling. RESULTS We found that MRTFs localize to IDs in the healthy human heart and accumulate in the nucleus in heart failure. Although mice lacking MRTFs in adult cardiomyocytes display normal cardiac physiology at baseline, pressure overload leads to rapid heart failure characterized by sarcomere disarray, ID disintegration, chamber dilation and wall thinning, cardiac functional decline, and partially penetrant acute lethality. Transcriptional profiling reveals a program of actin cytoskeleton and cardiomyocyte adhesion genes driven by MRTFs during pressure overload. Indeed, conspicuous remodeling of gap junctions at IDs identified by single-molecule localization microscopy may partially stem from a reduction in Mapre1 expression, which we show is a direct mechanosensitive MRTF target. CONCLUSIONS Our study describes a novel paradigm in which MRTFs control an acute mechanosensitive signaling circuit that coordinates cross-talk between the actin and microtubule cytoskeleton and maintains ID integrity and cardiomyocyte homeostasis in heart disease.
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MESH Headings
- Aged
- Animals
- Animals, Newborn
- COS Cells
- Case-Control Studies
- Chlorocebus aethiops
- Connexin 43/genetics
- Connexin 43/metabolism
- Female
- Gene Expression Regulation
- Heart Failure/genetics
- Heart Failure/metabolism
- Heart Failure/pathology
- Heart Failure/physiopathology
- Humans
- Hypertrophy, Left Ventricular/genetics
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/pathology
- Hypertrophy, Left Ventricular/physiopathology
- Male
- Mechanotransduction, Cellular
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Microscopy, Confocal
- Microscopy, Electron, Transmission
- Microtubule-Associated Proteins/genetics
- Microtubule-Associated Proteins/metabolism
- Middle Aged
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/ultrastructure
- NIH 3T3 Cells
- Single Molecule Imaging
- Trans-Activators/deficiency
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transcription Factors/deficiency
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Ventricular Function, Left
- Ventricular Remodeling
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Affiliation(s)
- Michael A. Trembley
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | - Pearl Quijada
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | - Esperanza Agullo-Pascual
- The Leon H Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, NY
| | - Kevin M. Tylock
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
| | - Mert Colpan
- Department of Cellular and Molecular Medicine, Sarver Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
| | - Ronald A. Dirkx
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | - Jason R. Myers
- Genomics Research Center, University of Rochester, Rochester, NY
| | - Deanne M. Mickelsen
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | | | - Eli Rothenberg
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY
| | | | - Jeffrey D. Alexis
- Division of Cardiology, Department of Medicine, University of Rochester, Rochester, NY
| | - Carol C. Gregorio
- Department of Cellular and Molecular Medicine, Sarver Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
| | - Robert T. Dirksen
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
| | - Mario Delmar
- The Leon H Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, NY
| | - Eric M. Small
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
- Author for correspondence: Eric M. Small, Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY 14642, Phone: (585)276-7706, Fax: (585) 276-9839,
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19
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Wang J, Li Y, Gao L, Yan F, Gao G, Li L. GSK-3β Inhibitor Alsterpaullone Attenuates MPP +-Induced Cell Damage in a c-Myc-Dependent Manner in SH-SY5Y Cells. Front Cell Neurosci 2018; 12:283. [PMID: 30233322 PMCID: PMC6127625 DOI: 10.3389/fncel.2018.00283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 08/09/2018] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial dysfunction plays significant roles in the pathogenesis of Parkinson’s Disease (PD). The inactivation of c-Myc, a down-stream gene of Wnt/β-catenin signaling, may contribute to the mitochondria dysfunction. Inhibition of glycogen synthase kinase 3β (GSK-3β) with Alsterpaullone (Als) can activate the down-stream events of Wnt signaling. Here, we investigated the protective roles of Als against MPP+-induced cell apoptosis in SH-SY5Y cells. The data showed that Als effectively rescued c-Myc from the MPP+-induced decline via Wnt signaling. Furthermore, Als protected SH-SY5Y cells from the MPP+-induced mitochondrial fission and cell apoptosis. However, the protective roles of Als were lost under β-catenin-deficient conditions. These findings indicate that Als, a GSK-3β inhibitor, attenuated the MPP+-induced mitochondria-dependent apoptotic via up-regulation of the Wnt signaling.
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Affiliation(s)
- Jiancai Wang
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Yuqian Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Li Gao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Fengqi Yan
- Department of Urology, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Guodong Gao
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
| | - Lihong Li
- Department of Neurosurgery, Tangdu Hospital, Fourth Military Medical University, Xi'an, China
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20
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Abreu Velez AM, Howard MS, Velazquez-Velez JE. Cardiac rhythm and pacemaking abnormalities in patients affected by endemic pemphigus in Colombia may be the result of deposition of autoantibodies, complement, fibrinogen, and other molecules. Heart Rhythm 2017; 15:725-731. [PMID: 29277685 DOI: 10.1016/j.hrthm.2017.12.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Indexed: 02/03/2023]
Abstract
BACKGROUND We previously showed that one-third of patients affected by endemic pemphigus foliaceus in El Bagre, Colombia (El Bagre-EPF), display autoreactivity to the heart. OBJECTIVE The purpose of this study was to investigate rhythm disturbances with the presence of autoantibodies and correlate them with ECG changes in these patients. METHODS We performed a study comparing 30 patients and 30 controls from the endemic area, matched by demographics, including age, sex, weight, work activities, and comorbidities. ECG as well as direct and indirect immunofluorescence, immunohistochemistry, and confocal microscopic studies focusing on cardiac node abnormalities were performed. Autopsies of 7 patients also were reviewed. RESULTS The main ECG abnormalities seen in the El Bagre-EPF patients were sinus bradycardia (in one-half), followed by left bundle branch block, left posterior fascicular block, and left anterior fascicular block compared with the controls. One-third of the patients displayed polyclonal autoantibodies against the sinoatrial and/or AV nodes and the His bundle correlating with rhythm anomalies and delays in the cardiac conduction system (P <.01). The patient antibodies colocalized with commercial antibodies to desmoplakins I and II, p0071, armadillo repeat gene deleted in velo-cardio-facial syndrome (ARVCF), and myocardium-enriched zonula occludens-1-associated protein (MYZAP; Progen Biotechnik) (P <.01). CONCLUSION One-third of the patients affected by El Bagre-EPF have rhythm abnormalities that slow the conduction of impulses in cardiac nodes and the cardiac conduction system. These abnormalities likely occur as a result of deposition of autoantibodies, complement, and other inflammatory molecules. We show for the first time that MYZAP is present in cardiac nodes.
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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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22
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Lee CY, Kuo WW, Baskaran R, Day CH, Pai PY, Lai CH, Chen YF, Chen RJ, Padma VV, Huang CY. Increased β-catenin accumulation and nuclear translocation are associated with concentric hypertrophy in cardiomyocytes. Cardiovasc Pathol 2017; 31:9-16. [PMID: 28802159 DOI: 10.1016/j.carpath.2017.07.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/06/2017] [Accepted: 07/06/2017] [Indexed: 01/19/2023] Open
Abstract
Defective Wnt/β-Catenin signaling, activated under various pathological conditions, can result in cardiac and vascular abnormalities. In the present study, the possible role of β-catenin over expression during cardiac hypertrophy was investigated. Ten samples from hearts of human patients with acute infarction, and granulation tissue from 20 patients and 10 from normal ones were collected in order to investigate roles of β-catenin in cardiac hypertrophy. H9c2 cardiomyoblast cells and Wistar rat primary neonatal cardiomyocytes were overexpressed with β-catenin. Expression levels of β-catenin protein were increased in human acute infarction tissues and rat hypertension heart tissues. Overexpression of this transcription factor induced actin filament formation and increased hypertrophic marker protein levels via MAPK pathway. In addition, β-catenin overexpression also resulted in increased elevation of NFATc3 and p-GATA4. Therefore, acute infarction resulted in β-catenin overexpression mediated hypertrophy in cardiomyocytes regulated through MAPK pathway.
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Affiliation(s)
- Cheng-Yu Lee
- Department of Cardiology, Taipei City Hospital, Zhongxiao Branch, Taipei, Taiwan
| | - Wei Wen Kuo
- Department of Biological Science and Technology, China Medical University, Taichung 40402, Taiwan
| | - Rathinasamy Baskaran
- National Institute of Cancer Research, National Health Research Institutes, Zhunan, Miaoli County 35053, Taiwan
| | | | - Pei Ying Pai
- Division of Cardiology, China Medical University Hospital, Taichung 40447, Taiwan
| | - Chao Hung Lai
- Division of Cardiology, Department of Internal Medicine, Armed Force Taichung General Hospital, Taichung 41152, Taiwan
| | - Yu-Feng Chen
- Division of Cardiology, Department of Internal Medicine, Armed Force Taichung General Hospital, Taichung 41152, Taiwan
| | - Ray-Jade Chen
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | | | - Chih Yang Huang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung 40402, Taiwan; Graduate Institute of Chinese Medical Science, China Medical University, Taichung 40402, Taiwan; Department of Health and Nutrition Biotechnology, Asia University, Taichung 41354, Taiwan; Faculty of Applied Sciences, Ton Duc Thang University, Tan Phong Ward, District 7, 700000 Ho Chi Minh City, Vietnam.
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23
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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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24
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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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