1
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Lan T, Kaminsky S, Wu CC. Ploidy in cardiovascular development and regeneration. Semin Cell Dev Biol 2025; 172:103618. [PMID: 40398363 DOI: 10.1016/j.semcdb.2025.103618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2024] [Revised: 04/01/2025] [Accepted: 05/05/2025] [Indexed: 05/23/2025]
Abstract
Somatic polyploidy, a non-inheritable form of genome multiplication, plays cell-type specific and context-dependent roles in organ development and regeneration. In the mammalian heart, embryonic cardiomyocytes are primarily diploid, which lose their ability to complete cell division and become polyploid as they mature. Unlike lower vertebrates like zebrafish, polyploid cardiomyocytes are commonly found across mammals, including humans. Intriguingly, the degree, timing, and modes of cardiomyocyte polyploidization vary greatly between species. In addition to the association with cardiomyocyte development and maturation, recent studies have established polyploidy as a barrier against cardiomyocyte proliferation and heart regeneration following cardiac injury. Hence, a thorough understanding of how and why cardiomyocyte become polyploid will provide insights into heart development and may help develop therapeutic strategies for heart regeneration. Here, we review the dynamics of cardiomyocyte polyploidization across species and how cardiomyocyte-intrinsic, -extrinsic, and environmental factors regulate this process as well as the impact of cardiomyocyte polyploidization on heart development and regeneration.
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Affiliation(s)
- Tian Lan
- Heidelberg University, Medical Faculty Mannheim, European Center for Angioscience, Mannheim, Germany; Helmholtz-Institute for Translational AngioCardioScience (HI-TAC) of the Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) at Heidelberg University
| | - Sabrina Kaminsky
- Heidelberg University, Medical Faculty Mannheim, European Center for Angioscience, Mannheim, Germany; Faculty of Biosciences, Heidelberg University, Germany
| | - Chi-Chung Wu
- Heidelberg University, Medical Faculty Mannheim, European Center for Angioscience, Mannheim, Germany; Helmholtz-Institute for Translational AngioCardioScience (HI-TAC) of the Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) at Heidelberg University.
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2
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Wu B, Constanty F, Beisaw A. Cardiac regeneration: Unraveling the complex network of intercellular crosstalk. Semin Cell Dev Biol 2025; 171:103619. [PMID: 40367899 DOI: 10.1016/j.semcdb.2025.103619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2024] [Revised: 03/13/2025] [Accepted: 05/06/2025] [Indexed: 05/16/2025]
Abstract
The heart is composed of multiple cell types, including cardiomyocytes, endothelial/endocardial cells, fibroblasts, resident immune cells and epicardium and crosstalk between these cell types is crucial for proper cardiac function and homeostasis. In response to cardiac injury or disease, cell-cell interactions and intercellular crosstalk contribute to remodeling to compensate reduced heart function. In some vertebrates, the heart can regenerate following cardiac injury. While cardiomyocytes play a crucial role in this process, additional cell types are necessary to create a pro-regenerative microenvironment in the injured heart. Here, we review recent literature regarding the importance of cellular crosstalk in promoting cardiac regeneration and provide insight into emerging technologies to investigate cell-cell interactions in vivo. Lastly, we explore recent studies highlighting the importance of inter-organ communication in response to injury and promotion of cardiac regeneration. Importantly, understanding how intercellular and inter-organ crosstalk promote cardiac regeneration is essential for the development of therapeutic strategies to stimulate regeneration in the human heart.
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Affiliation(s)
- Bailin Wu
- Institute of Experimental Cardiology, Heidelberg University, Heidelberg, Germany; German Centre for Cardiovascular Research (DZHK), Heidelberg/Mannheim partner site, Germany
| | - Florian Constanty
- Institute of Experimental Cardiology, Heidelberg University, Heidelberg, Germany; German Centre for Cardiovascular Research (DZHK), Heidelberg/Mannheim partner site, Germany; Helmholtz-Institute for Translational AngioCardioScience (HI-TAC) of the Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) at Heidelberg University, Heidelberg 69117, Germany
| | - Arica Beisaw
- Institute of Experimental Cardiology, Heidelberg University, Heidelberg, Germany; German Centre for Cardiovascular Research (DZHK), Heidelberg/Mannheim partner site, Germany; Helmholtz-Institute for Translational AngioCardioScience (HI-TAC) of the Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) at Heidelberg University, Heidelberg 69117, Germany.
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3
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Koopmans T, van Rooij E. Molecular gatekeepers of endogenous adult mammalian cardiomyocyte proliferation. Nat Rev Cardiol 2025:10.1038/s41569-025-01145-y. [PMID: 40195566 DOI: 10.1038/s41569-025-01145-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/10/2025] [Indexed: 04/09/2025]
Abstract
Irreversible cardiac fibrosis, cardiomyocyte death and chronic cardiac dysfunction after myocardial infarction pose a substantial global health-care challenge, with no curative treatments available. To regenerate the injured heart, cardiomyocytes must proliferate to replace lost myocardial tissue - a capability that adult mammals have largely forfeited to adapt to the demanding conditions of life. Using various preclinical models, our understanding of cardiomyocyte proliferation has progressed remarkably, leading to the successful reactivation of cell cycle induction in adult animals, with functional recovery after cardiac injury. Central to this success is the targeting of key pathways and structures that drive cardiomyocyte maturation after birth - nucleation and ploidy, sarcomere structure, developmental signalling, chromatin and epigenetic regulation, the microenvironment and metabolic maturation - forming a complex regulatory framework that allows efficient cellular contraction but restricts cardiomyocyte proliferation. In this Review, we explore the molecular pathways underlying these core mechanisms and how their manipulation can reactivate the cell cycle in cardiomyocytes, potentially contributing to cardiac repair.
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Affiliation(s)
- Tim Koopmans
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, Netherlands
| | - Eva van Rooij
- Hubrecht Institute, Royal Netherlands Academy of Arts and Sciences (KNAW) and University Medical Center Utrecht, Utrecht, Netherlands.
- Department of Cardiology, University Medical Center Utrecht, Utrecht, Netherlands.
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4
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Yamada S, Johnson AN, Yang S. A Transgenic Method to Measure Mitotic Exit in Drosophila Embryos. Methods Mol Biol 2025; 2874:1-8. [PMID: 39614042 DOI: 10.1007/978-1-0716-4236-8_1] [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] [Indexed: 12/01/2024]
Abstract
Mitotic exit is a necessary step for highly specialized cells to terminally differentiate and acquire unique functions. The FUCCI system can be used to visualize mitotic and post-mitotic cells during development and regeneration in both live organisms and fixed tissues. Here we describe a Fly-FUCCI protocol for assaying mitotic exit in Drosophila embryos.
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Affiliation(s)
- Shige Yamada
- Department of Developmental Biology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Aaron N Johnson
- Department of Developmental Biology, Washington University School of Medicine in St. Louis, St. Louis, MO, USA
| | - Shuo Yang
- Department of Genetics and Genetics Engineering, School of Life Science, Fudan University, Shanghai, China.
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5
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Li C, Chen Y, Chen Q, Huang H, Hesse M, Zhou Y, Jin M, Liu Y, Ruan Y, He X, Wei G, Zheng H, Huang S, Chen G, Liao W, Liao Y, Chen Y, Bin J. RNA-Binding Protein Hnrnpa1 Triggers Daughter Cardiomyocyte Formation by Promoting Cardiomyocyte Dedifferentiation and Cell Cycle Activity in a Post-Transcriptional Manner. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2025; 12:e2402371. [PMID: 39559922 PMCID: PMC11727271 DOI: 10.1002/advs.202402371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 10/20/2024] [Indexed: 11/20/2024]
Abstract
Stimulating cardiomyocyte (CM) dedifferentiation and cell cycle activity (DACCA) is essential for triggering daughter CM formation. In addition to transcriptional processes, RNA-binding proteins (RBPs) are emerging as crucial post-transcriptional players in regulating CM DACCA. However, whether post-transcriptional regulation of CM DACCA by RBPs could effectively trigger daughter CM formation remains unknown. By performing integrated bioinformatic analysis of snRNA-seq data from neonatal and adult hearts, this study identified Hnrnpa1 as a potential RBP regulating CM DACCA. Hnrnpa1 expression decreased significantly during postnatal heart development. With the use of α-MHC-H2B-mCh/CAG-eGFP-anillin transgenic mice, Hnrnpa1 overexpression promoted CM DACCA, thereby triggering daughter CM formation and enhancing cardiac repair after myocardial infarction (MI). In contrast, CRISPR/Cas9 technology is used to generate CM-specific Hnrnpa1 knockout mice. Hnrnpa1 knockout inhibited cardiac regeneration and worsened cardiac function in the neonatal MI model. Nanopore RNA sequencing, RIP assay, IP-MS, MeRIP-qPCR, PAR-CLIP and luciferase reporter experiments showed that Hnrnpa1 induced Mettl3 post-transcriptional splicing to inhibit m6A-dependent Pbx1 and E2F1 degradation, thereby increasing Runx1, Ccne1, Cdk2 and Ccnb2 expression to promote CM DACCA. In conclusion, Hnrnpa1 triggered daughter CM formation by promoting CM DACCA in a post-transcriptional manner, indicating that Hnrnpa1 might serve as a promising target in cardiac repair post-MI.
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6
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Xiao F, Nguyen NUN, Wang P, Li S, Hsu CC, Thet S, Kimura W, Luo X, Lam NT, Menendez-Montes I, Elhelaly W, Cardoso AC, Pereira AHM, Singh R, Sadayappan S, Kanchwala M, Xing C, Ladha FA, Hinson JT, Hajjar RJ, Hill JA, Sadek HA. Adducin Regulates Sarcomere Disassembly During Cardiomyocyte Mitosis. Circulation 2024; 150:791-805. [PMID: 38708635 PMCID: PMC11651639 DOI: 10.1161/circulationaha.122.059102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Accepted: 03/29/2024] [Indexed: 05/07/2024]
Abstract
BACKGROUND Recent interest in understanding cardiomyocyte cell cycle has been driven by potential therapeutic applications in cardiomyopathy. However, despite recent advances, cardiomyocyte mitosis remains a poorly understood process. For example, it is unclear how sarcomeres are disassembled during mitosis to allow the abscission of daughter cardiomyocytes. METHODS Here, we use a proteomics screen to identify adducin, an actin capping protein previously not studied in cardiomyocytes, as a regulator of sarcomere disassembly. We generated many adeno-associated viruses and cardiomyocyte-specific genetic gain-of-function models to examine the role of adducin in neonatal and adult cardiomyocytes in vitro and in vivo. RESULTS We identify adducin as a regulator of sarcomere disassembly during mammalian cardiomyocyte mitosis. α/γ-adducins are selectively expressed in neonatal mitotic cardiomyocytes, and their levels decline precipitously thereafter. Cardiomyocyte-specific overexpression of various splice isoforms and phospho-isoforms of α-adducin in vitro and in vivo identified Thr445/Thr480 phosphorylation of a short isoform of α-adducin as a potent inducer of neonatal cardiomyocyte sarcomere disassembly. Concomitant overexpression of this α-adducin variant along with γ-adducin resulted in stabilization of the adducin complex and persistent sarcomere disassembly in adult mice, which is mediated by interaction with α-actinin. CONCLUSIONS These results highlight an important mechanism for coordinating cytoskeletal morphological changes during cardiomyocyte mitosis.
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Affiliation(s)
- Feng Xiao
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ngoc Uyen Nhi Nguyen
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ping Wang
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Shujuan Li
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ching-Cheng Hsu
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Suwannee Thet
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Wataru Kimura
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Life Science Center, Tsukuba Advanced Research Alliance, University of Tsukuba, Japan
| | - Xiang Luo
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Nicholas T. Lam
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Ivan Menendez-Montes
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Waleed Elhelaly
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Alisson Campos Cardoso
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Ana Helena Macedo Pereira
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Biosciences National Laboratory, Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil
| | - Rohit Singh
- Center for Cardiovascular Research, Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0575, USA
- Amgen Research, Department of Cardiometabolic Disorders, Amgen, South San Francisco, CA, USA
| | - Sakthivel Sadayappan
- Center for Cardiovascular Research, Division of Cardiovascular Health and Disease, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0575, USA
| | - Mohammed Kanchwala
- Eugene McDermott Center for Human Growth and Development, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Chao Xing
- Eugene McDermott Center for Human Growth and Development, The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Lyda Hill Department of Bioinformatics, The University of Texas Southwestern Medical Center, Dallas, TX, USA
- O'Donnell School of Public Health, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Feria A. Ladha
- University of Connecticut Health Center, Farmington, CT, USA
| | - J. Travis Hinson
- University of Connecticut Health Center, Farmington, CT, USA
- Jackson Laboratory for Genomic Medicine, Farmington, CT, USA
| | - Roger J. Hajjar
- Gene & Cell Therapy Institute, Mass General Brigham, Cambridge, MA, USA
| | - Joseph A. Hill
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Moss Heart Center, The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Department of Molecular Biology, The University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Hesham A. Sadek
- Departments of Internal Medicine (Cardiology), The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Department of Molecular Biology, The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Department of Biophysics, The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Hamon Center for Regenerative Science and Medicine, The University of Texas Southwestern Medical Center, Dallas, TX, USA
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid 28029, Spain
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7
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Vanderslice EJ, Golding SGH, Jacot JG. Vascularization of PEGylated fibrin hydrogels increases the proliferation of human iPSC-cardiomyocytes. J Biomed Mater Res A 2024; 112:625-634. [PMID: 38155509 PMCID: PMC10922460 DOI: 10.1002/jbm.a.37662] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 12/13/2023] [Accepted: 12/15/2023] [Indexed: 12/30/2023]
Abstract
Studies have long sought to develop engineered heart tissue for the surgical correction of structural heart defects, as well as other applications and vascularization of this tissue has presented a challenge. Recent studies suggest that vascular cells and a vascular network may have regenerative effects on implanted cardiomyocytes (CM) and nearby heart tissue separate from perfusion of oxygen and nutrients. The goal of this study was to test whether vascular cells or a formed vascular network in a fibrin-based hydrogel would alter the proliferation of human iPSC-derived CM. First, vascular network formation in a slowly degrading PEGylated fibrin hydrogel was optimized by altering the cell ratio of human umbilical vein endothelial cells to human dermal fibroblasts, the inclusion of growth factors, and the total cell concentration. An endothelial to fibroblast ratio of 5:1 and a total cell concentration of 1.1 × 106 cells/mL without additional growth factors generated robust vascular networks while minimizing the number of cells required. Using this optimized system, human iPSC-derived CM were cultured on hydrogels without vascular cells, hydrogels with unorganized encapsulated vascular cells, or hydrogels with encapsulated vascular cells organized into networks for 7 days. CM proliferation and gene expression were assayed following 7 days of culture on the hydrogels. The presence of vascular cells in the hydrogel, whether unorganized or in vascular networks, significantly increased CM proliferation compared to an acellular hydrogel. Hydrogels with unorganized vascular cells resulted in lower CM maturity evidenced by decreased expression of cardiac troponin t (TNNT2), myosin light chain 7, and phospholamban compared to hydrogels without vascular cells and hydrogels with vascular networks. Altogether, this study details a robust method of forming rudimentary vascular networks in a fibrin-based hydrogel and shows that a hydrogel containing endothelial cells and fibroblasts can induce proliferation in adjacent CM, and these cells do not hinder CM gene expression when organized into a vascular network.
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Affiliation(s)
- Ethan J. Vanderslice
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, USA 80045
| | - Staunton G. H. Golding
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, USA 80045
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN, USA 37235
| | - Jeffrey G. Jacot
- Department of Bioengineering, University of Colorado Anschutz Medical Campus, Aurora, CO, USA 80045
- Department of Pediatrics, Children’s Hospital Colorado, Aurora, CO, USA 80045
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8
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Rao K, Rochon E, Singh A, Jagannathan R, Peng Z, Mansoor H, Wang B, Moulik M, Zhang M, Saraf A, Corti P, Shiva S. Myoglobin modulates the Hippo pathway to promote cardiomyocyte differentiation. iScience 2024; 27:109146. [PMID: 38414852 PMCID: PMC10897895 DOI: 10.1016/j.isci.2024.109146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 09/30/2023] [Accepted: 02/01/2024] [Indexed: 02/29/2024] Open
Abstract
The endogenous mechanisms that propagate cardiomyocyte differentiation and prevent de-differentiation remain unclear. While the expression of the heme protein myoglobin increases by over 50% during cardiomyocyte differentiation, a role for myoglobin in regulating cardiomyocyte differentiation has not been tested. Here, we show that deletion of myoglobin in cardiomyocyte models decreases the gene expression of differentiation markers and stimulates cellular proliferation, consistent with cardiomyocyte de-differentiation. Mechanistically, the heme prosthetic group of myoglobin catalyzes the oxidation of the Hippo pathway kinase LATS1, resulting in phosphorylation and inactivation of yes-associated protein (YAP). In vivo, myoglobin-deficient zebrafish hearts show YAP dephosphorylation and accelerated cardiac regeneration after apical injury. Similarly, myoglobin knockdown in neonatal murine hearts shows increased YAP dephosphorylation and cardiomyocyte cycling. These data demonstrate a novel role for myoglobin as an endogenous driver of cardiomyocyte differentiation and highlight myoglobin as a potential target to enhance cardiac development and improve cardiac repair and regeneration.
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Affiliation(s)
- Krithika Rao
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Elizabeth Rochon
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Anuradha Singh
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Rajaganapathi Jagannathan
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Division of Cardiology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Zishan Peng
- Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Haris Mansoor
- Heart and Vascular Institute Division of Cardiology, Department of Medicine and Pediatrics, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Bing Wang
- Molecular Therapy Lab, Stem Cell Research Center, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | - Mousumi Moulik
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Division of Cardiology, Department of Pediatrics, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Manling Zhang
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Division of Cardiology, Veteran Affair Pittsburgh Healthcare System, Pittsburgh, PA 15240, USA
- Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Anita Saraf
- Heart and Vascular Institute Division of Cardiology, Department of Medicine and Pediatrics, University of Pittsburgh Medical Center, Pittsburgh, PA, USA
| | - Paola Corti
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Division of Cardiology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15213, USA
| | - Sruti Shiva
- Heart, Lung, Blood Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA
- Department of Pharmacology & Chemical Biology, University of Pittsburgh, Pittsburgh, PA 15261, USA
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9
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Buddell T, Purdy AL, Patterson M. The genetics of cardiomyocyte polyploidy. Curr Top Dev Biol 2024; 156:245-295. [PMID: 38556425 DOI: 10.1016/bs.ctdb.2024.01.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
The regulation of ploidy in cardiomyocytes is a complex and tightly regulated aspect of cardiac development and function. Cardiomyocyte ploidy can range from diploid (2N) to 8N or even 16N, and these states change during key stages of development and disease progression. Polyploidization has been associated with cellular hypertrophy to support normal growth of the heart, increased contractile capacity, and improved stress tolerance in the heart. Conversely, alterations to ploidy also occur during cardiac pathogenesis of diseases, such as ischemic and non-ischemic heart failure and arrhythmia. Therefore, understanding which genes control and modulate cardiomyocyte ploidy may provide mechanistic insight underlying cardiac growth, regeneration, and disease. This chapter summarizes the current knowledge regarding the genes involved in the regulation of cardiomyocyte ploidy. We discuss genes that have been directly tested for their role in cardiomyocyte polyploidization, as well as methodologies used to identify ploidy alterations. These genes encode cell cycle regulators, transcription factors, metabolic proteins, nuclear scaffolding, and components of the sarcomere, among others. The general physiological and pathological phenotypes in the heart associated with the genetic manipulations described, and how they coincide with the respective cardiomyocyte ploidy alterations, are further discussed in this chapter. In addition to being candidates for genetic-based therapies for various cardiac maladies, these genes and their functions provide insightful evidence regarding the purpose of widespread polyploidization in cardiomyocytes.
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Affiliation(s)
- Tyler Buddell
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States; Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Alexandra L Purdy
- Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Michaela Patterson
- Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States; Department of Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, WI, United States.
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10
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Abstract
Permanent fibrosis and chronic deterioration of heart function in patients after myocardial infarction present a major health-care burden worldwide. In contrast to the restricted potential for cellular and functional regeneration of the adult mammalian heart, a robust capacity for cardiac regeneration is seen during the neonatal period in mammals as well as in the adults of many fish and amphibian species. However, we lack a complete understanding as to why cardiac regeneration takes place more efficiently in some species than in others. The capacity of the heart to regenerate after injury is controlled by a complex network of cellular and molecular mechanisms that form a regulatory landscape, either permitting or restricting regeneration. In this Review, we provide an overview of the diverse array of vertebrates that have been studied for their cardiac regenerative potential and discuss differential heart regeneration outcomes in closely related species. Additionally, we summarize current knowledge about the core mechanisms that regulate cardiac regeneration across vertebrate species.
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Affiliation(s)
- Michael Weinberger
- Institute of Developmental & Regenerative Medicine, University of Oxford, Oxford, UK
- MRC Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Paul R Riley
- Institute of Developmental & Regenerative Medicine, University of Oxford, Oxford, UK.
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11
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Strash N, DeLuca S, Janer Carattini GL, Chen Y, Wu T, Helfer A, Scherba J, Wang I, Jain M, Naseri R, Bursac N. Time-dependent effects of BRAF-V600E on cell cycling, metabolism, and function in engineered myocardium. SCIENCE ADVANCES 2024; 10:eadh2598. [PMID: 38266090 PMCID: PMC10807800 DOI: 10.1126/sciadv.adh2598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2023] [Accepted: 12/22/2023] [Indexed: 01/26/2024]
Abstract
Candidate cardiomyocyte (CM) mitogens such as those affecting the extracellular signal-regulated kinase (ERK) signaling pathway represent potential targets for functional heart regeneration. We explored whether activating ERK via a constitutively active mutant of B-raf proto-oncogene (BRAF), BRAF-V600E (caBRAF), can induce proproliferative effects in neonatal rat engineered cardiac tissues (ECTs). Sustained CM-specific caBRAF expression induced chronic ERK activation, substantial tissue growth, deficit in sarcomeres and contractile function, and tissue stiffening, all of which persisted for at least 4 weeks of culture. caBRAF-expressing CMs in ECTs exhibited broad transcriptomic changes, shift to glycolytic metabolism, loss of connexin-43, and a promigratory phenotype. Transient, doxycycline-controlled caBRAF expression revealed that the induction of CM cycling is rapid and precedes functional decline, and the effects are reversible only with short-lived ERK activation. Together, direct activation of the BRAF kinase is sufficient to modulate CM cycling and functional phenotype, offering mechanistic insights into roles of ERK signaling in the context of cardiac development and regeneration.
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Affiliation(s)
| | - Sophia DeLuca
- Department of Cell Biology, Duke University, Durham NC, USA
| | | | - Yifan Chen
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Tianyu Wu
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Abbigail Helfer
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Jacob Scherba
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Isabella Wang
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Mehul Jain
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Ramona Naseri
- Department of Biomedical Engineering, Duke University, Durham NC, USA
| | - Nenad Bursac
- Department of Cell Biology, Duke University, Durham NC, USA
- Department of Biomedical Engineering, Duke University, Durham NC, USA
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12
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Beisaw A, Wu CC. Cardiomyocyte maturation and its reversal during cardiac regeneration. Dev Dyn 2024; 253:8-27. [PMID: 36502296 DOI: 10.1002/dvdy.557] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 12/03/2022] [Accepted: 12/03/2022] [Indexed: 12/14/2022] Open
Abstract
Cardiovascular disease is a leading cause of death worldwide. Due to the limited proliferative and regenerative capacity of adult cardiomyocytes, the lost myocardium is not replenished efficiently and is replaced by a fibrotic scar, which eventually leads to heart failure. Current therapies to cure or delay the progression of heart failure are limited; hence, there is a pressing need for regenerative approaches to support the failing heart. Cardiomyocytes undergo a series of transcriptional, structural, and metabolic changes after birth (collectively termed maturation), which is critical for their contractile function but limits the regenerative capacity of the heart. In regenerative organisms, cardiomyocytes revert from their terminally differentiated state into a less mature state (ie, dedifferentiation) to allow for proliferation and regeneration to occur. Importantly, stimulating adult cardiomyocyte dedifferentiation has been shown to promote morphological and functional improvement after myocardial infarction, further highlighting the importance of cardiomyocyte dedifferentiation in heart regeneration. Here, we review several hallmarks of cardiomyocyte maturation, and summarize how their reversal facilitates cardiomyocyte proliferation and heart regeneration. A detailed understanding of how cardiomyocyte dedifferentiation is regulated will provide insights into therapeutic options to promote cardiomyocyte de-maturation and proliferation, and ultimately heart regeneration in mammals.
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Affiliation(s)
- Arica Beisaw
- Institute of Experimental Cardiology, Heidelberg University, Heidelberg, Germany
| | - Chi-Chung Wu
- European Center for Angioscience (ECAS), Medical Faculty Mannheim, Heidelberg University, Heidelberg, Germany
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13
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Ormrod B, Ehler E. Induced pluripotent stem cell-derived cardiomyocytes-more show than substance? Biophys Rev 2023; 15:1941-1950. [PMID: 38192353 PMCID: PMC10771368 DOI: 10.1007/s12551-023-01099-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 07/04/2023] [Indexed: 01/10/2024] Open
Abstract
Cardiomyocytes that are derived from human-induced pluripotent stem cells (iPSC-CM) are an exciting tool to investigate cardiomyopathy disease mechanisms at the cellular level as well as to screen for potential side effects of novel drugs. However, currently their benefit is limited due to their fairly immature differentiation status under conventional culture conditions. This review is mainly aimed at researchers outside of the iPSC-CM field and will describe potential pitfalls and which features at the level of the myofibrils would be desired to make them a more representative model system. We will also discuss different strategies that may help to achieve these.
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Affiliation(s)
- Beth Ormrod
- School of Cardiovascular and Metabolic Medicine and Sciences, King’s College London, London, SE1 1UL UK
| | - Elisabeth Ehler
- School of Cardiovascular and Metabolic Medicine and Sciences, King’s College London, London, SE1 1UL UK
- Randall Centre for Cell and Molecular Biophysics (School of Basic and Biosciences), Room 3.26A, New Hunt’s House, Guy’s Campus, London, SE1 1UL UK
- British Heart Foundation Centre of Research Excellence, King’s College London, London, SE1 1UL UK
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14
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Yang X, Li L, Zeng C, Wang WE. The characteristics of proliferative cardiomyocytes in mammals. J Mol Cell Cardiol 2023; 185:50-64. [PMID: 37918322 DOI: 10.1016/j.yjmcc.2023.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 10/03/2023] [Accepted: 10/16/2023] [Indexed: 11/04/2023]
Abstract
Better understanding of the mechanisms regulating the proliferation of pre-existing cardiomyocyte (CM) should lead to better options for regenerating injured myocardium. The absence of a perfect research model to definitively identify newly formed mammalian CMs is lacking. However, methodologies are being developed to identify and enrich proliferative CMs. These methods take advantages of the different proliferative states of CMs during postnatal development, before and after injury in the neonatal heart. New approaches use CMs labeled in lineage tracing animals or single cell technique-based CM clusters. This review aims to provide a timely update on the characteristics of the proliferative CMs, including their structural, functional, genetic, epigenetic and metabolic characteristics versus non-proliferative CMs. A better understanding of the characteristics of proliferative CMs should lead to the mechanisms for inducing endogenous CMs to self-renew, which is a promising therapeutic strategy to treat cardiac diseases that cause CM death in humans.
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Affiliation(s)
- Xinyue Yang
- Department of Geriatrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Liangpeng Li
- Department of Cardiology, Daping Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Chunyu Zeng
- Department of Cardiology, Daping Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
| | - Wei Eric Wang
- Department of Geriatrics, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
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15
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Aballo TJ, Bae J, Paltzer WG, Chapman EA, Salamon RJ, Mann MM, Ge Y, Mahmoud AI. Integrated Proteomics Identifies Troponin I Isoform Switch as a Regulator of a Sarcomere-Metabolism Axis During Cardiac Regeneration. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.10.20.563389. [PMID: 37961158 PMCID: PMC10634731 DOI: 10.1101/2023.10.20.563389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2023]
Abstract
Adult mammalian cardiomyocytes have limited proliferative potential, and after myocardial infarction (MI), injured cardiac tissue is replaced with fibrotic scar rather than with functioning myocardium. In contrast, the neonatal mouse heart possesses a regenerative capacity governed by cardiomyocyte proliferation; however, a metabolic switch from glycolysis to fatty acid oxidation during postnatal development results in loss of this regenerative capacity. Interestingly, a sarcomere isoform switch also takes place during postnatal development where slow skeletal troponin I (ssTnI) is replaced with cardiac troponin I (cTnI). In this study, we first employ integrated quantitative bottom-up and top-down proteomics to comprehensively define the proteomic and sarcomeric landscape during postnatal heart maturation. Utilizing a cardiomyocyte-specific ssTnI transgenic mouse model, we found that ssTnI overexpression increased cardiomyocyte proliferation and the cardiac regenerative capacity of the postnatal heart following MI compared to control mice by histological analysis. Our global proteomic analysis of ssTnI transgenic mice following MI reveals that ssTnI overexpression induces a significant shift in the cardiac proteomic landscape. This shift is characterized by an upregulation of key proteins involved in glycolytic metabolism. Collectively, our data suggest that the postnatal TnI isoform switch may play a role in the metabolic shift from glycolysis to fatty acid oxidation during postnatal maturation. This underscores the significance of a sarcomere-metabolism axis during cardiomyocyte proliferation and heart regeneration.
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Affiliation(s)
- Timothy J. Aballo
- Department of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
- Molecular and Cellular Pharmacology Training Program, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Jiyoung Bae
- Department of Nutritional Sciences, Oklahoma State University, Stillwater, OK 74078, USA
| | - Wyatt G. Paltzer
- Department of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Emily A. Chapman
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Rebecca J. Salamon
- Department of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Morgan M. Mann
- Department of Medicine, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Ying Ge
- Department of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Chemistry, University of Wisconsin-Madison, Madison, WI 53705, USA
- Human Proteomics Program, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Ahmed I. Mahmoud
- Department of Cell and Regenerative Biology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
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16
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Shi W, Scialdone AP, Emerson JI, Mei L, Wasson LK, Davies HA, Seidman CE, Seidman JG, Cook JG, Conlon FL. Missense Mutation in Human CHD4 Causes Ventricular Noncompaction by Repressing ADAMTS1. Circ Res 2023; 133:48-67. [PMID: 37254794 PMCID: PMC10284140 DOI: 10.1161/circresaha.122.322223] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 05/02/2023] [Accepted: 05/05/2023] [Indexed: 06/01/2023]
Abstract
BACKGROUND Left ventricular noncompaction (LVNC) is a prevalent cardiomyopathy associated with excessive trabeculation and thin compact myocardium. Patients with LVNC are vulnerable to cardiac dysfunction and at high risk of sudden death. Although sporadic and inherited mutations in cardiac genes are implicated in LVNC, understanding of the mechanisms responsible for human LVNC is limited. METHODS We screened the complete exome sequence database of the Pediatrics Cardiac Genomics Consortium and identified a cohort with a de novo CHD4 (chromodomain helicase DNA-binding protein 4) proband, CHD4M202I, with congenital heart defects. We engineered a humanized mouse model of CHD4M202I (mouse CHD4M195I). Histological analysis, immunohistochemistry, flow cytometry, transmission electron microscopy, and echocardiography were used to analyze cardiac anatomy and function. Ex vivo culture, immunopurification coupled with mass spectrometry, transcriptional profiling, and chromatin immunoprecipitation were performed to deduce the mechanism of CHD4M195I-mediated ventricular wall defects. RESULTS CHD4M195I/M195I mice developed biventricular hypertrabeculation and noncompaction and died at birth. Proliferation of cardiomyocytes was significantly increased in CHD4M195I hearts, and the excessive trabeculation was associated with accumulation of ECM (extracellular matrix) proteins and a reduction of ADAMTS1 (ADAM metallopeptidase with thrombospondin type 1 motif 1), an ECM protease. We rescued the hyperproliferation and hypertrabeculation defects in CHD4M195I hearts by administration of ADAMTS1. Mechanistically, the CHD4M195I protein showed augmented affinity to endocardial BRG1 (SWI/SNF-related, matrix-associated, actin-dependent regulator of chromatin, subfamily A, member 4). This enhanced affinity resulted in the failure of derepression of Adamts1 transcription such that ADAMTS1-mediated trabeculation termination was impaired. CONCLUSIONS Our study reveals how a single mutation in the chromatin remodeler CHD4, in mice or humans, modulates ventricular chamber maturation and that cardiac defects associated with the missense mutation CHD4M195I can be attenuated by the administration of ADAMTS1.
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Affiliation(s)
- Wei Shi
- Department of Biology and Genetics, McAllister Heart Institute (W.S., A.P.S., J.I.E., H.A.D., F.L.C.), the University of North Carolina at Chapel Hill
| | - Angel P. Scialdone
- Department of Biology and Genetics, McAllister Heart Institute (W.S., A.P.S., J.I.E., H.A.D., F.L.C.), the University of North Carolina at Chapel Hill
| | - James I. Emerson
- Department of Biology and Genetics, McAllister Heart Institute (W.S., A.P.S., J.I.E., H.A.D., F.L.C.), the University of North Carolina at Chapel Hill
| | - Liu Mei
- Department of Biochemistry & Biophysics (L.M., J.G.C.), the University of North Carolina at Chapel Hill
| | - Lauren K. Wasson
- Department of Genetics, Harvard Medical School, Boston, MA (L.K.W., C.E.S., J.G.S.)
- Howard Hughes Medical Institute, Chevy Chase, MD (L.K.W., C.E.S.)
| | - Haley A. Davies
- Department of Biology and Genetics, McAllister Heart Institute (W.S., A.P.S., J.I.E., H.A.D., F.L.C.), the University of North Carolina at Chapel Hill
| | - Christine E. Seidman
- Department of Genetics, Harvard Medical School, Boston, MA (L.K.W., C.E.S., J.G.S.)
- Howard Hughes Medical Institute, Chevy Chase, MD (L.K.W., C.E.S.)
- Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston, MA (C.E.S.)
| | - Jonathan G. Seidman
- Department of Biochemistry & Biophysics (L.M., J.G.C.), the University of North Carolina at Chapel Hill
- Department of Genetics, Harvard Medical School, Boston, MA (L.K.W., C.E.S., J.G.S.)
| | - Jeanette G. Cook
- Department of Biology and Genetics, McAllister Heart Institute (W.S., A.P.S., J.I.E., H.A.D., F.L.C.), the University of North Carolina at Chapel Hill
- Department of Biochemistry & Biophysics (L.M., J.G.C.), the University of North Carolina at Chapel Hill
- Lineberger Comprehensive Cancer Center (F.L.C.), the University of North Carolina at Chapel Hill
- Department of Genetics, Harvard Medical School, Boston, MA (L.K.W., C.E.S., J.G.S.)
- Howard Hughes Medical Institute, Chevy Chase, MD (L.K.W., C.E.S.)
- Division of Cardiovascular Medicine, Brigham and Women’s Hospital, Boston, MA (C.E.S.)
| | - Frank L. Conlon
- Department of Biology and Genetics, McAllister Heart Institute (W.S., A.P.S., J.I.E., H.A.D., F.L.C.), the University of North Carolina at Chapel Hill
- Lineberger Comprehensive Cancer Center (F.L.C.), the University of North Carolina at Chapel Hill
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17
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Broadway-Stringer S, Jiang H, Wadmore K, Hooper C, Douglas G, Steeples V, Azad AJ, Singer E, Reyat JS, Galatik F, Ehler E, Bennett P, Kalisch-Smith JI, Sparrow DB, Davies B, Djinovic-Carugo K, Gautel M, Watkins H, Gehmlich K. Insights into the Role of a Cardiomyopathy-Causing Genetic Variant in ACTN2. Cells 2023; 12:721. [PMID: 36899856 PMCID: PMC10001372 DOI: 10.3390/cells12050721] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 02/13/2023] [Accepted: 02/21/2023] [Indexed: 03/12/2023] Open
Abstract
Pathogenic variants in ACTN2, coding for alpha-actinin 2, are known to be rare causes of Hypertrophic Cardiomyopathy. However, little is known about the underlying disease mechanisms. Adult heterozygous mice carrying the Actn2 p.Met228Thr variant were phenotyped by echocardiography. For homozygous mice, viable E15.5 embryonic hearts were analysed by High Resolution Episcopic Microscopy and wholemount staining, complemented by unbiased proteomics, qPCR and Western blotting. Heterozygous Actn2 p.Met228Thr mice have no overt phenotype. Only mature males show molecular parameters indicative of cardiomyopathy. By contrast, the variant is embryonically lethal in the homozygous setting and E15.5 hearts show multiple morphological abnormalities. Molecular analyses, including unbiased proteomics, identified quantitative abnormalities in sarcomeric parameters, cell-cycle defects and mitochondrial dysfunction. The mutant alpha-actinin protein is found to be destabilised, associated with increased activity of the ubiquitin-proteasomal system. This missense variant in alpha-actinin renders the protein less stable. In response, the ubiquitin-proteasomal system is activated; a mechanism that has been implicated in cardiomyopathies previously. In parallel, a lack of functional alpha-actinin is thought to cause energetic defects through mitochondrial dysfunction. This seems, together with cell-cycle defects, the likely cause of the death of the embryos. The defects also have wide-ranging morphological consequences.
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Affiliation(s)
| | - He Jiang
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Oxford OX3 9DU, UK
| | - Kirsty Wadmore
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Charlotte Hooper
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Oxford OX3 9DU, UK
| | - Gillian Douglas
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Oxford OX3 9DU, UK
| | - Violetta Steeples
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Oxford OX3 9DU, UK
| | - Amar J. Azad
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Evie Singer
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Jasmeet S. Reyat
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Frantisek Galatik
- Department of Physiology, Faculty of Science, Charles University, 12800 Prague, Czech Republic
| | - Elisabeth Ehler
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London SE1 9RT, UK
- School of Cardiovascular and Metabolic Medicine and Sciences, British Heart Foundation Centre of Research Excellence, King’s College London, London SE1 9RT, UK
| | - Pauline Bennett
- Randall Centre for Cell and Molecular Biophysics, King’s College London, London SE1 9RT, UK
| | | | - Duncan B. Sparrow
- Department of Physiology, Anatomy and Genetics, University of Oxford, Oxford OX1 3PT, UK
| | - Benjamin Davies
- Transgenic Core, Wellcome Centre for Human Genetics, University of Oxford, Oxford OX3 7BN, UK
| | - Kristina Djinovic-Carugo
- European Molecular Biology Laboratory, 38000 Grenoble, France
- Department of Structural and Computational Biology, Max Perutz Labs, University of Vienna, 1030 Vienna, Austria
| | - Mathias Gautel
- School of Basic and Medical Biosciences, British Heart Foundation Centre of Research Excellence, King’s College London, London SE1 9RT, UK
| | - Hugh Watkins
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Oxford OX3 9DU, UK
| | - Katja Gehmlich
- Institute of Cardiovascular Sciences, University of Birmingham, Birmingham B15 2TT, UK
- Division of Cardiovascular Medicine, Radcliffe Department of Medicine and British Heart Foundation Centre of Research Excellence Oxford, University of Oxford, Oxford OX3 9DU, UK
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18
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Singh BN, Yucel D, Garay BI, Tolkacheva EG, Kyba M, Perlingeiro RCR, van Berlo JH, Ogle BM. Proliferation and Maturation: Janus and the Art of Cardiac Tissue Engineering. Circ Res 2023; 132:519-540. [PMID: 36795845 PMCID: PMC9943541 DOI: 10.1161/circresaha.122.321770] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
During cardiac development and morphogenesis, cardiac progenitor cells differentiate into cardiomyocytes that expand in number and size to generate the fully formed heart. Much is known about the factors that regulate initial differentiation of cardiomyocytes, and there is ongoing research to identify how these fetal and immature cardiomyocytes develop into fully functioning, mature cells. Accumulating evidence indicates that maturation limits proliferation and conversely proliferation occurs rarely in cardiomyocytes of the adult myocardium. We term this oppositional interplay the proliferation-maturation dichotomy. Here we review the factors that are involved in this interplay and discuss how a better understanding of the proliferation-maturation dichotomy could advance the utility of human induced pluripotent stem cell-derived cardiomyocytes for modeling in 3-dimensional engineered cardiac tissues to obtain truly adult-level function.
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Affiliation(s)
- Bhairab N. Singh
- Department of Pediatrics, University of Minnesota, MN, USA
- Department of Biomedical Engineering, University of Minnesota, MN, USA
- Stem Cell Institute, University of Minnesota, MN, USA
| | - Dogacan Yucel
- Stem Cell Institute, University of Minnesota, MN, USA
- Department of Medicine, Cardiovascular Division, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
| | - Bayardo I. Garay
- Stem Cell Institute, University of Minnesota, MN, USA
- Department of Medicine, Cardiovascular Division, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
- Medical Scientist Training Program, University of Minnesota Medical School, MN, USA
| | - Elena G. Tolkacheva
- Department of Biomedical Engineering, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
- Institute for Engineering in Medicine, University of Minnesota, MN, USA
| | - Michael Kyba
- Department of Pediatrics, University of Minnesota, MN, USA
- Stem Cell Institute, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
| | - Rita C. R. Perlingeiro
- Stem Cell Institute, University of Minnesota, MN, USA
- Department of Medicine, Cardiovascular Division, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
| | - Jop H. van Berlo
- Stem Cell Institute, University of Minnesota, MN, USA
- Department of Medicine, Cardiovascular Division, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
| | - Brenda M. Ogle
- Department of Pediatrics, University of Minnesota, MN, USA
- Department of Biomedical Engineering, University of Minnesota, MN, USA
- Stem Cell Institute, University of Minnesota, MN, USA
- Lillehei Heart Institute, University of Minnesota, MN, USA
- Institute for Engineering in Medicine, University of Minnesota, MN, USA
- Masonic Cancer Center, University of Minnesota, MN, USA
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19
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Cheng YY, Gregorich Z, Prajnamitra RP, Lundy DJ, Ma TY, Huang YH, Lee YC, Ruan SC, Lin JH, Lin PJ, Kuo CW, Chen P, Yan YT, Tian R, Kamp TJ, Hsieh PC. Metabolic Changes Associated With Cardiomyocyte Dedifferentiation Enable Adult Mammalian Cardiac Regeneration. Circulation 2022; 146:1950-1967. [PMID: 36420731 PMCID: PMC9808601 DOI: 10.1161/circulationaha.122.061960] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 09/29/2022] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cardiac regeneration after injury is limited by the low proliferative capacity of adult mammalian cardiomyocytes (CMs). However, certain animals readily regenerate lost myocardium through a process involving dedifferentiation, which unlocks their proliferative capacities. METHODS We bred mice with inducible, CM-specific expression of the Yamanaka factors, enabling adult CM reprogramming and dedifferentiation in vivo. RESULTS Two days after induction, adult CMs presented a dedifferentiated phenotype and increased proliferation in vivo. Microarray analysis revealed that upregulation of ketogenesis was central to this process. Adeno-associated virus-driven HMGCS2 overexpression induced ketogenesis in adult CMs and recapitulated CM dedifferentiation and proliferation observed during partial reprogramming. This same phenomenon was found to occur after myocardial infarction, specifically in the border zone tissue, and HMGCS2 knockout mice showed impaired cardiac function and response to injury. Finally, we showed that exogenous HMGCS2 rescues cardiac function after ischemic injury. CONCLUSIONS Our data demonstrate the importance of HMGCS2-induced ketogenesis as a means to regulate metabolic response to CM injury, thus allowing cell dedifferentiation and proliferation as a regenerative response.
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Affiliation(s)
- Yuan-Yuan Cheng
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Zachery Gregorich
- Department of Medicine and Stem Cell and Regenerative Medicine Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | | | - David J. Lundy
- Graduate Institute of Biomedical Materials and Tissue Engineering, Taipei Medical University, Taipei 110, Taiwan
| | - Ting-Yun Ma
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Yu-Hsuan Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Yi-Chan Lee
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Shu-Chian Ruan
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Jen-Hao Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Po-Ju Lin
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Chiung Wen Kuo
- Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Peilin Chen
- Research Center for Applied Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Yu-Ting Yan
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
| | - Rong Tian
- Mitochondria and Metabolism Center, Department of Anesthesiology and Pain Medicine and Department of Bioengineering, University of Washington, Seattle, WA 98109, USA
| | - Timothy J. Kamp
- Department of Medicine and Stem Cell and Regenerative Medicine Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Patrick C.H. Hsieh
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
- Department of Medicine and Stem Cell and Regenerative Medicine Center, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI 53705, USA
- Graduate Institute of Medical Genomics and Proteomics and Graduate Institute of Clinical Medicine, College of Medicine, National Taiwan University, Taipei 100, Taiwan
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20
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Cardiomyocyte Proliferation from Fetal- to Adult- and from Normal- to Hypertrophy and Failing Hearts. BIOLOGY 2022; 11:biology11060880. [PMID: 35741401 PMCID: PMC9220194 DOI: 10.3390/biology11060880] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Revised: 05/26/2022] [Accepted: 06/02/2022] [Indexed: 11/20/2022]
Abstract
Simple Summary Death from injury to the heart from a variety of causes remains a major cause of mortality worldwide. The cardiomyocyte, the major contracting cell of the heart, is responsible for pumping blood to the rest of the body. During fetal development, these immature cardiomyocytes are small and rapidly divide to complete development of the heart by birth when they develop structural and functional characteristics of mature cells which prevent further division. All further growth of the heart after birth is due to an increase in the size of cardiomyocytes, hypertrophy. Following the loss of functional cardiomyocytes due to coronary artery occlusion or other causes, the heart is unable to replace the lost cells. One of the significant research goals has been to induce adult cardiomyocytes to reactivate the cell cycle and repair cardiac injury. This review explores the developmental, structural, and functional changes of the growing cardiomyocyte, and particularly the sarcomere, responsible for force generation, from the early fetal period of reproductive cell growth through the neonatal period and on to adulthood, as well as during pathological response to different forms of myocardial diseases or injury. Multiple issues relative to cardiomyocyte cell-cycle regulation in normal or diseased conditions are discussed. Abstract The cardiomyocyte undergoes dramatic changes in structure, metabolism, and function from the early fetal stage of hyperplastic cell growth, through birth and the conversion to hypertrophic cell growth, continuing to the adult stage and responding to various forms of stress on the myocardium, often leading to myocardial failure. The fetal cell with incompletely formed sarcomeres and other cellular and extracellular components is actively undergoing mitosis, organelle dispersion, and formation of daughter cells. In the first few days of neonatal life, the heart is able to repair fully from injury, but not after conversion to hypertrophic growth. Structural and metabolic changes occur following conversion to hypertrophic growth which forms a barrier to further cardiomyocyte division, though interstitial components continue dividing to keep pace with cardiac growth. Both intra- and extracellular structural changes occur in the stressed myocardium which together with hemodynamic alterations lead to metabolic and functional alterations of myocardial failure. This review probes some of the questions regarding conditions that regulate normal and pathologic growth of the heart.
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21
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Zhu W, Sun J, Bishop SP, Sadek H, Zhang J. Turning back the clock: A concise viewpoint of cardiomyocyte cell cycle activation for myocardial regeneration and repair. J Mol Cell Cardiol 2022; 170:15-21. [PMID: 35660800 PMCID: PMC9391298 DOI: 10.1016/j.yjmcc.2022.05.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 04/18/2022] [Accepted: 05/14/2022] [Indexed: 11/25/2022]
Abstract
Patients with acute myocardial infarction (MI) could progress to end-stage congestive heart failure, which is one of the most significant problems in public health. From the molecular and cellular perspective, heart failure often results from the loss of cardiomyocytes-the fundamental contractile unit of the heart-and the damage caused by myocardial injury in adult mammals cannot be repaired, in part because mammalian cardiomyocytes undergo cell-cycle arrest during the early perinatal period. However, recent studies in the hearts of neonatal small and large mammals suggest that the onset of cardiomyocyte cell-cycle arrest can be reversed, which may lead to the development of entirely new strategies for the treatment of heart failure. In this Viewpoint, we summarize these and other provocative findings about the cellular and molecular mechanisms that regulate cardiomyocyte proliferation and how they may be targeted to turn back the clock of cardiomyocyte cell-cycle arrest and improve recovery from cardiac injury and disease.
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Affiliation(s)
- Wuqiang Zhu
- Department of Cardiovascular Diseases, Physiology and Biomedical Engineering, Center for Regenerative Medicine, Mayo Clinic, Scottsdale, AZ 85259, United States of America
| | - Jiacheng Sun
- Department of Biomedical Engineering, School of Medicine and School of Engineering, the University of Alabama at Birmingham, Birmingham, AL 35294, United States of America
| | - Sanford P Bishop
- Department of Biomedical Engineering, School of Medicine and School of Engineering, the University of Alabama at Birmingham, Birmingham, AL 35294, United States of America
| | - Hesham Sadek
- Division of Cardiovascular Diseases, UT Southwestern Medical Center, United States of America
| | - Jianyi Zhang
- Department of Biomedical Engineering, School of Medicine and School of Engineering, the University of Alabama at Birmingham, Birmingham, AL 35294, United States of America; Department of Medicine, Division of Cardiovascular Diseases, School of Medicine, the University of Alabama at Birmingham, Birmingham, AL 35294, United States of America.
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22
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Abstract
PURPOSE OF REVIEW The lack of adult human cardiomyocyte proliferative capacity impairs cardiac regeneration such as after myocardial injury. The sarcomere, a specialized actin cytoskeletal structure that is essential for twitch contraction in cardiomyocytes, has been considered a critical factor limiting adult human cardiomyocyte proliferation through incompletely understood mechanisms. RECENT FINDINGS This review summarizes known and emerging regulatory mechanisms connecting the human cardiomyocyte sarcomere to cell cycle regulation including structural and signaling mechanisms. Cardiac regeneration could be augmented through targeting the inhibitory effects of the sarcomere on cardiomyocyte proliferation.
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Affiliation(s)
| | - Feria A Ladha
- University of Connecticut Health Center, Farmington, CT, 06030, USA
| | - J Travis Hinson
- University of Connecticut Health Center, Farmington, CT, 06030, USA.
- The Jackson Laboratory for Genomic Medicine, 10 Discovery Drive, Farmington, CT, 06032, USA.
- Cardiology Center, UConn Health, Farmington, CT, 06030, USA.
- UConn Health, 263 Farmington Ave, Farmington, CT, 06030, USA.
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23
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Liu S, Martin JF. RNA splicing to cytoskeleton: A new path to cardiomyocyte ploidy and division? Dev Cell 2022; 57:945-946. [PMID: 35472320 DOI: 10.1016/j.devcel.2022.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mammalian cardiomyocytes (CMs) undergo polyploidization after birth, accompanied by the loss of CM proliferation and regenerative capacity, although why this occurs is still poorly understood. In this issue of Developmental Cell, Gan et al. show that premature CM polyploidization, through defective RNA splicing, is detrimental to ventricular wall growth.
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Affiliation(s)
- Shijie Liu
- Cardiomyocyte Renewal Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX 77030, USA
| | - James F Martin
- Cardiomyocyte Renewal Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX 77030, USA; Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
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24
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Cumberland MJ, Riebel LL, Roy A, O’Shea C, Holmes AP, Denning C, Kirchhof P, Rodriguez B, Gehmlich K. Basic Research Approaches to Evaluate Cardiac Arrhythmia in Heart Failure and Beyond. Front Physiol 2022; 13:806366. [PMID: 35197863 PMCID: PMC8859441 DOI: 10.3389/fphys.2022.806366] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 01/10/2022] [Indexed: 12/20/2022] Open
Abstract
Patients with heart failure often develop cardiac arrhythmias. The mechanisms and interrelations linking heart failure and arrhythmias are not fully understood. Historically, research into arrhythmias has been performed on affected individuals or in vivo (animal) models. The latter however is constrained by interspecies variation, demands to reduce animal experiments and cost. Recent developments in in vitro induced pluripotent stem cell technology and in silico modelling have expanded the number of models available for the evaluation of heart failure and arrhythmia. An agnostic approach, combining the modalities discussed here, has the potential to improve our understanding for appraising the pathology and interactions between heart failure and arrhythmia and can provide robust and validated outcomes in a variety of research settings. This review discusses the state of the art models, methodologies and techniques used in the evaluation of heart failure and arrhythmia and will highlight the benefits of using them in combination. Special consideration is paid to assessing the pivotal role calcium handling has in the development of heart failure and arrhythmia.
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Affiliation(s)
- Max J. Cumberland
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Leto L. Riebel
- Department of Computer Science, University of Oxford, Oxford, United Kingdom
| | - Ashwin Roy
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Christopher O’Shea
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Andrew P. Holmes
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
- Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
| | - Chris Denning
- Stem Cell Biology Unit, Biodiscovery Institute, British Heart Foundation Centre for Regenerative Medicine, University of Nottingham, Nottingham, United Kingdom
| | - Paulus Kirchhof
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
- University Heart and Vascular Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Blanca Rodriguez
- Department of Computer Science, University of Oxford, Oxford, United Kingdom
| | - Katja Gehmlich
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, United Kingdom
- Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford and British Heart Foundation Centre of Research Excellence Oxford, Oxford, United Kingdom
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25
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Yuan Q, Maas RGC, Brouwer ECJ, Pei J, Blok CS, Popovic MA, Paauw NJ, Bovenschen N, Hjortnaes J, Harakalova M, Doevendans PA, Sluijter JPG, van der Velden J, Buikema JW. Sarcomere Disassembly and Transfection Efficiency in Proliferating Human iPSC-Derived Cardiomyocytes. J Cardiovasc Dev Dis 2022; 9:jcdd9020043. [PMID: 35200697 PMCID: PMC8880351 DOI: 10.3390/jcdd9020043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 01/10/2022] [Accepted: 01/21/2022] [Indexed: 02/01/2023] Open
Abstract
Contractility of the adult heart relates to the architectural degree of sarcomeres in individual cardiomyocytes (CMs) and appears to be inversely correlated with the ability to regenerate. In this study we utilized multiple imaging techniques to follow the sequence of sarcomere disassembly during mitosis resulting in cellular or nuclear division in a source of proliferating human pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs). We observed that both mono- and binuclear hiPSC-CMs give rise to mononuclear daughter cells or binuclear progeny. Within this source of highly proliferative hiPSC-CMs, treated with the CHIR99021 small molecule, we found that Wnt and Hippo signaling was more present when compared to metabolic matured non-proliferative hiPSC-CMs and adult human heart tissue. Furthermore, we found that CHIR99021 increased the efficiency of non-viral vector incorporation in high-proliferative hiPSC-CMs, in which fluorescent transgene expression became present after the chromosomal segregation (M phase). This study provides a tool for gene manipulation studies in hiPSC-CMs and engineered cardiac tissue. Moreover, our data illustrate that there is a complex biology behind the cellular and nuclear division of mono- and binuclear CMs, with a shared-phenomenon of sarcomere disassembly during mitosis.
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Affiliation(s)
- Qianliang Yuan
- Amsterdam Cardiovascular Sciences, Department of Physiology, Amsterdam University Medical Centers, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (Q.Y.); (E.C.J.B.); (J.v.d.V.)
| | - Renee G. C. Maas
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Ellen C. J. Brouwer
- Amsterdam Cardiovascular Sciences, Department of Physiology, Amsterdam University Medical Centers, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (Q.Y.); (E.C.J.B.); (J.v.d.V.)
| | - Jiayi Pei
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Christian Snijders Blok
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Marko A. Popovic
- Department of Molecular Cell Biology and Immunology (MCBI), Amsterdam University Medical Centers, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (M.A.P.); (N.J.P.)
| | - Nanne J. Paauw
- Department of Molecular Cell Biology and Immunology (MCBI), Amsterdam University Medical Centers, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (M.A.P.); (N.J.P.)
| | - Niels Bovenschen
- Bachelor Research Hub, Educational Center, University Medical Centre Utrecht, 3584 CX Utrecht, The Netherlands;
- Department of Pathology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
- Center for Translational Immunology, University Medical Center Utrecht, 3584 CX Utrecht, The Netherlands
| | - Jesper Hjortnaes
- Department of Cardiothoracic Surgery, Heart & Lung Center, Leiden University Medical Center, Leiden University, Albinusdreef 2, 2333 ZA Leiden, The Netherlands;
| | - Magdalena Harakalova
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Pieter A. Doevendans
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
- Netherlands Heart Institute, Holland Heart House, Moreelsepark 1, 3511 EP Utrecht, The Netherlands
| | - Joost P. G. Sluijter
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
| | - Jolanda van der Velden
- Amsterdam Cardiovascular Sciences, Department of Physiology, Amsterdam University Medical Centers, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (Q.Y.); (E.C.J.B.); (J.v.d.V.)
| | - Jan W. Buikema
- Amsterdam Cardiovascular Sciences, Department of Physiology, Amsterdam University Medical Centers, De Boelelaan 1108, 1081 HZ Amsterdam, The Netherlands; (Q.Y.); (E.C.J.B.); (J.v.d.V.)
- Utrecht Regenerative Medicine Center, Circulatory Health Laboratory, University Utrecht, 3584 CS Utrecht, The Netherlands; (R.G.C.M.); (J.P.); (C.S.B.); (M.H.); (P.A.D.); (J.P.G.S.)
- Department of Cardiology, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands
- Correspondence:
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26
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Biophysical Reviews "Meet the Editor Series"-Elisabeth Ehler. Biophys Rev 2021; 13:579-581. [PMID: 34777613 DOI: 10.1007/s12551-021-00830-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 08/14/2021] [Indexed: 10/20/2022] Open
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27
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Valussi M, Besser J, Wystub-Lis K, Zukunft S, Richter M, Kubin T, Boettger T, Braun T. Repression of Osmr and Fgfr1 by miR-1/133a prevents cardiomyocyte dedifferentiation and cell cycle entry in the adult heart. SCIENCE ADVANCES 2021; 7:eabi6648. [PMID: 34644107 PMCID: PMC8514096 DOI: 10.1126/sciadv.abi6648] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Dedifferentiation of cardiomyocytes is part of the survival program in the remodeling myocardium and may be essential for enabling cardiomyocyte proliferation. In addition to transcriptional processes, non-coding RNAs play important functions for the control of cell cycle regulation in cardiomyocytes and cardiac regeneration. Here, we demonstrate that suppression of FGFR1 and OSMR by miR-1/133a is instrumental to prevent cardiomyocyte dedifferentiation and cell cycle entry in the adult heart. Concomitant inactivation of both miR-1/133a clusters in adult cardiomyocytes activates expression of cell cycle regulators, induces a switch from fatty acid to glycolytic metabolism, and changes expression of extracellular matrix genes. Inhibition of FGFR and OSMR pathways prevents most effects of miR-1/133a inactivation. Short-term miR-1/133a depletion protects cardiomyocytes against ischemia, while extended loss of miR-1/133a causes heart failure. Our results demonstrate a crucial role of miR-1/133a–mediated suppression of Osmr and Ffgfr1 in maintaining the postmitotic differentiated state of cardiomyocytes.
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Affiliation(s)
- Melissa Valussi
- Department of Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, D-61231 Bad Nauheim, Germany
| | - Johannes Besser
- Department of Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, D-61231 Bad Nauheim, Germany
| | - Katharina Wystub-Lis
- Department of Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, D-61231 Bad Nauheim, Germany
| | - Sven Zukunft
- Institute for Vascular Signalling, Centre for Molecular Medicine, Goethe University, D-60590 Frankfurt am Main, Germany
| | - Manfred Richter
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, D-61231 Bad Nauheim, Germany
| | - Thomas Kubin
- Department of Cardiac Surgery, Kerckhoff Heart Center, Benekestrasse 2-8, D-61231 Bad Nauheim, Germany
| | - Thomas Boettger
- Department of Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, D-61231 Bad Nauheim, Germany
- Corresponding author. (T.Bo.); (T.Br.)
| | - Thomas Braun
- Department of Cardiac Development and Remodelling, Max Planck Institute for Heart and Lung Research, Ludwigstrasse 43, D-61231 Bad Nauheim, Germany
- German Center for Cardiovascular Research (DZHK), Berlin, Germany
- German Center for Lung Research (DZL), Giessen, Germany
- Corresponding author. (T.Bo.); (T.Br.)
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28
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Honkoop H, Nguyen PD, van der Velden VEM, Sonnen KF, Bakkers J. Live imaging of adult zebrafish cardiomyocyte proliferation ex vivo. Development 2021; 148:271839. [PMID: 34397091 PMCID: PMC8489017 DOI: 10.1242/dev.199740] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 08/04/2021] [Indexed: 12/24/2022]
Abstract
Zebrafish are excellent at regenerating their heart by reinitiating proliferation in pre-existing cardiomyocytes. Studying how zebrafish achieve this holds great potential in developing new strategies to boost mammalian heart regeneration. Nevertheless, the lack of appropriate live-imaging tools for the adult zebrafish heart has limited detailed studies into the dynamics underlying cardiomyocyte proliferation. Here, we address this by developing a system in which cardiac slices of the injured zebrafish heart are cultured ex vivo for several days while retaining key regenerative characteristics, including cardiomyocyte proliferation. In addition, we show that the cardiac slice culture system is compatible with live timelapse imaging and allows manipulation of regenerating cardiomyocytes with drugs that normally would have toxic effects that prevent their use. Finally, we use the cardiac slices to demonstrate that adult cardiomyocytes with fully assembled sarcomeres can partially disassemble their sarcomeres in a calpain- and proteasome-dependent manner to progress through nuclear division and cytokinesis. In conclusion, we have developed a cardiac slice culture system, which allows imaging of native cardiomyocyte dynamics in real time to discover cellular mechanisms during heart regeneration.
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Affiliation(s)
- Hessel Honkoop
- Hubrecht Institute-KNAW and Utrecht University Medical Center, Utrecht 3584CT, The Netherlands
| | - Phong D Nguyen
- Hubrecht Institute-KNAW and Utrecht University Medical Center, Utrecht 3584CT, The Netherlands
| | | | - Katharina F Sonnen
- Hubrecht Institute-KNAW and Utrecht University Medical Center, Utrecht 3584CT, The Netherlands
| | - Jeroen Bakkers
- Hubrecht Institute-KNAW and Utrecht University Medical Center, Utrecht 3584CT, The Netherlands.,Department of Pediatric Cardiology, Division of Pediatrics, University Medical Center Utrecht, Utrecht 3584EA, The Netherlands
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29
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Liu S, Li K, Wagner Florencio L, Tang L, Heallen TR, Leach JP, Wang Y, Grisanti F, Willerson JT, Perin EC, Zhang S, Martin JF. Gene therapy knockdown of Hippo signaling induces cardiomyocyte renewal in pigs after myocardial infarction. Sci Transl Med 2021; 13:13/600/eabd6892. [PMID: 34193613 DOI: 10.1126/scitranslmed.abd6892] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 04/03/2021] [Accepted: 06/11/2021] [Indexed: 01/03/2023]
Abstract
Human heart failure, a leading cause of death worldwide, is a prominent example of a chronic disease that may result from poor cell renewal. The Hippo signaling pathway is an inhibitory kinase cascade that represses adult heart muscle cell (cardiomyocyte) proliferation and renewal after myocardial infarction in genetically modified mice. Here, we investigated an adeno-associated virus 9 (AAV9)-based gene therapy to locally knock down the Hippo pathway gene Salvador (Sav) in border zone cardiomyocytes in a pig model of ischemia/reperfusion-induced myocardial infarction. Two weeks after myocardial infarction, when pigs had left ventricular systolic dysfunction, we administered AAV9-Sav-short hairpin RNA (shRNA) or a control AAV9 viral vector carrying green fluorescent protein (GFP) directly into border zone cardiomyocytes via catheter-mediated subendocardial injection. Three months after injection, pig hearts treated with a high dose of AAV9-Sav-shRNA exhibited a 14.3% improvement in ejection fraction (a measure of left ventricular systolic function), evidence of cardiomyocyte division, and reduced scar sizes compared to pigs receiving AAV9-GFP. AAV9-Sav-shRNA-treated pig hearts also displayed increased capillary density and reduced cardiomyocyte ploidy. AAV9-Sav-shRNA gene therapy was well tolerated and did not induce mortality. In addition, liver and lung pathology revealed no tumor formation. Local delivery of AAV9-Sav-shRNA gene therapy to border zone cardiomyocytes in pig hearts after myocardial infarction resulted in tissue renewal and improved function and may have utility in treating heart failure.
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Affiliation(s)
| | - Ke Li
- Texas Heart Institute, Houston, TX, USA
| | | | - Li Tang
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA
| | | | - John P Leach
- Department of Medicine, Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | | | - Francisco Grisanti
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA
| | | | | | - Sui Zhang
- Texas Heart Institute, Houston, TX, USA
| | - James F Martin
- Texas Heart Institute, Houston, TX, USA. .,Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, TX, USA.,Center for Organ Repair and Renewal and Cardiovascular Research Institute, Baylor College of Medicine, Houston, TX, USA
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30
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Kisby T, de Lázaro I, Stylianou M, Cossu G, Kostarelos K. Transient reprogramming of postnatal cardiomyocytes to a dedifferentiated state. PLoS One 2021; 16:e0251054. [PMID: 33951105 PMCID: PMC8099115 DOI: 10.1371/journal.pone.0251054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 04/19/2021] [Indexed: 11/25/2022] Open
Abstract
In contrast to mammals, lower vertebrates are capable of extraordinary myocardial regeneration thanks to the ability of their cardiomyocytes to undergo transient dedifferentiation and proliferation. Somatic cells can be temporarily reprogrammed to a proliferative, dedifferentiated state through forced expression of Oct3/4, Sox2, Klf4 and c-Myc (OSKM). Here, we aimed to induce transient reprogramming of mammalian cardiomyocytes in vitro utilising an OSKM-encoding non-integrating vector. Reprogramming factor expression in postnatal rat and mouse cardiomyocytes triggered rapid but limited cell dedifferentiation. Concomitantly, a significant increase in cell viability, cell cycle related gene expression and Ki67 positive cells was observed consistent with an enhanced cell cycle activation. The transient nature of this partial reprogramming was confirmed as cardiomyocyte-specific cell morphology, gene expression and contractile activity were spontaneously recovered by day 15 after viral transduction. This study provides the first evidence that adenoviral OSKM delivery can induce partial reprogramming of postnatal cardiomyocytes. Therefore, adenoviral mediated transient reprogramming could be a novel and feasible strategy to recapitulate the regenerative mechanisms of lower vertebrates.
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Affiliation(s)
- Thomas Kisby
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Irene de Lázaro
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Maria Stylianou
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Giulio Cossu
- Division of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Kostas Kostarelos
- Nanomedicine Lab, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), UAB Campus Bellaterra, Barcelona, Spain
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31
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Pettinato AM, Yoo D, VanOudenhove J, Chen YS, Cohn R, Ladha FA, Yang X, Thakar K, Romano R, Legere N, Meredith E, Robson P, Regnier M, Cotney JL, Murry CE, Hinson JT. Sarcomere function activates a p53-dependent DNA damage response that promotes polyploidization and limits in vivo cell engraftment. Cell Rep 2021; 35:109088. [PMID: 33951429 PMCID: PMC8161465 DOI: 10.1016/j.celrep.2021.109088] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 03/11/2021] [Accepted: 04/14/2021] [Indexed: 12/21/2022] Open
Abstract
Human cardiac regeneration is limited by low cardiomyocyte replicative rates and progressive polyploidization by unclear mechanisms. To study this process, we engineer a human cardiomyocyte model to track replication and polyploidization using fluorescently tagged cyclin B1 and cardiac troponin T. Using time-lapse imaging, in vitro cardiomyocyte replication patterns recapitulate the progressive mononuclear polyploidization and replicative arrest observed in vivo. Single-cell transcriptomics and chromatin state analyses reveal that polyploidization is preceded by sarcomere assembly, enhanced oxidative metabolism, a DNA damage response, and p53 activation. CRISPR knockout screening reveals p53 as a driver of cell-cycle arrest and polyploidization. Inhibiting sarcomere function, or scavenging ROS, inhibits cell-cycle arrest and polyploidization. Finally, we show that cardiomyocyte engraftment in infarcted rat hearts is enhanced 4-fold by the increased proliferation of troponin-knockout cardiomyocytes. Thus, the sarcomere inhibits cell division through a DNA damage response that can be targeted to improve cardiomyocyte replacement strategies.
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Affiliation(s)
- Anthony M Pettinato
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT 06030, USA
| | - Dasom Yoo
- Department of Bioengineering, University of Washington, Seattle, WA 98109, USA
| | | | - Yu-Sheng Chen
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Rachel Cohn
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Feria A Ladha
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT 06030, USA
| | - Xiulan Yang
- Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - Ketan Thakar
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Robert Romano
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Nicolas Legere
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Emily Meredith
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Paul Robson
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA
| | - Michael Regnier
- Department of Bioengineering, University of Washington, Seattle, WA 98109, USA
| | - Justin L Cotney
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT 06030, USA
| | - Charles E Murry
- Department of Bioengineering, University of Washington, Seattle, WA 98109, USA; Center for Cardiovascular Biology and Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Pathology, University of Washington, Seattle, WA 98109, USA; Department of Medicine/Cardiology, University of Washington, Seattle, WA 98109, USA
| | - J Travis Hinson
- Department of Genetics and Genome Sciences, UConn Health, Farmington, CT 06030, USA; The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA.
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32
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Zheng L, Du J, Wang Z, Zhou Q, Zhu X, Xiong JW. Molecular regulation of myocardial proliferation and regeneration. CELL REGENERATION (LONDON, ENGLAND) 2021; 10:13. [PMID: 33821373 PMCID: PMC8021683 DOI: 10.1186/s13619-021-00075-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 02/04/2021] [Indexed: 12/21/2022]
Abstract
Heart regeneration is a fascinating and complex biological process. Decades of intensive studies have revealed a sophisticated molecular network regulating cardiac regeneration in the zebrafish and neonatal mouse heart. Here, we review both the classical and recent literature on the molecular and cellular mechanisms underlying heart regeneration, with a particular focus on how injury triggers the cell-cycle re-entry of quiescent cardiomyocytes to replenish their massive loss after myocardial infarction or ventricular resection. We highlight several important signaling pathways for cardiomyocyte proliferation and propose a working model of how these injury-induced signals promote cardiomyocyte proliferation. Thus, this concise review provides up-to-date research progresses on heart regeneration for investigators in the field of regeneration biology.
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Affiliation(s)
- Lixia Zheng
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100871, China
| | - Jianyong Du
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100871, China
| | - Zihao Wang
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100871, China
| | - Qinchao Zhou
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100871, China
| | - Xiaojun Zhu
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100871, China.
| | - Jing-Wei Xiong
- Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Institute of Molecular Medicine and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing, 100871, China
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33
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Braga L, Ali H, Secco I, Giacca M. Non-coding RNA therapeutics for cardiac regeneration. Cardiovasc Res 2021; 117:674-693. [PMID: 32215566 PMCID: PMC7898953 DOI: 10.1093/cvr/cvaa071] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/02/2020] [Accepted: 03/20/2020] [Indexed: 12/19/2022] Open
Abstract
A growing body of evidence indicates that cardiac regeneration after myocardial infarction can be achieved by stimulating the endogenous capacity of cardiomyocytes (CMs) to replicate. This process is controlled, both positively and negatively, by a large set of non-coding RNAs (ncRNAs). Some of the microRNAs (miRNAs) that can stimulate CM proliferation is expressed in embryonic stem cells and is required to maintain pluripotency (e.g. the miR-302∼367 cluster). Others also govern the proliferation of different cell types, including cancer cells (e.g. the miR-17∼92 cluster). Additional miRNAs were discovered through systematic screenings (e.g. miR-199a-3p and miR-590-3p). Several miRNAs instead suppress CM proliferation and are involved in the withdrawal of CMs from the cell cycle after birth (e.g. the let-7 and miR-15 families). Similar regulatory roles on CM proliferation are also exerted by a few long ncRNAs. This body of information has obvious therapeutic implications, as miRNAs with activator function or short antisense oligonucleotides against inhibitory miRNAs or lncRNAs can be administered to stimulate cardiac regeneration. Expression of miRNAs can be achieved by gene therapy using adeno-associated vectors, which transduce CMs with high efficiency. More effective and safer for therapeutic purposes, small nucleic acid therapeutics can be obtained as chemically modified, synthetic molecules, which can be administered through lipofection or inclusion in lipid or polymer nanoparticles for efficient cardiac delivery. The notion that it is possible to reprogramme CMs into a regenerative state and that this property can be enhanced by ncRNA therapeutics remains exciting, however extensive experimentation in large mammals and rigorous assessment of safety are required to advance towards clinical application.
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Affiliation(s)
- Luca Braga
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King’s College London, The James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Hashim Ali
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King’s College London, The James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Ilaria Secco
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King’s College London, The James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
| | - Mauro Giacca
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King’s College London, The James Black Centre, 125 Coldharbour Lane, London SE5 9NU, UK
- Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
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34
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Cardiac cell type-specific responses to injury and contributions to heart regeneration. CELL REGENERATION 2021; 10:4. [PMID: 33527149 PMCID: PMC7851195 DOI: 10.1186/s13619-020-00065-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/13/2020] [Indexed: 12/13/2022]
Abstract
Heart disease is the leading cause of mortality worldwide. Due to the limited proliferation rate of mature cardiomyocytes, adult mammalian hearts are unable to regenerate damaged cardiac muscle following injury. Instead, injured area is replaced by fibrotic scar tissue, which may lead to irreversible cardiac remodeling and organ failure. In contrast, adult zebrafish and neonatal mammalian possess the capacity for heart regeneration and have been widely used as experimental models. Recent studies have shown that multiple types of cells within the heart can respond to injury with the activation of distinct signaling pathways. Determining the specific contributions of each cell type is essential for our understanding of the regeneration network organization throughout the heart. In this review, we provide an overview of the distinct functions and coordinated cell behaviors of several major cell types including cardiomyocytes, endocardial cells, epicardial cells, fibroblasts, and immune cells. The topic focuses on their specific responses and cellular plasticity after injury, and potential therapeutic applications.
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35
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Bishop SP, Zhou Y, Nakada Y, Zhang J. Changes in Cardiomyocyte Cell Cycle and Hypertrophic Growth During Fetal to Adult in Mammals. J Am Heart Assoc 2021; 10:e017839. [PMID: 33399005 PMCID: PMC7955297 DOI: 10.1161/jaha.120.017839] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The failure of adult cardiomyocytes to reproduce themselves to repair an injury results in the development of severe cardiac disability leading to death in many cases. The quest for an understanding of the inability of cardiac myocytes to repair an injury has been ongoing for decades with the identification of various factors which have a temporary effect on cell‐cycle activity. Fetal cardiac myocytes are continuously replicating until the time that the developing fetus reaches a stage of maturity sufficient for postnatal life around the time of birth. Recent reports of the ability for early neonatal mice and pigs to completely repair after the severe injury has stimulated further study of the regulators of the cardiomyocyte cell cycle to promote replication for the remuscularization of injured heart. In all mammals just before or after birth, single‐nucleated hyperplastically growing cardiomyocytes, 1X2N, undergo ≥1 additional DNA replications not followed by cytokinesis, resulting in cells with ≥2 nuclei or as in primates, multiple DNA replications (polyploidy) of 1 nucleus, 2X2(+)N or 1X4(+)N. All further growth of the heart is attributable to hypertrophy of cardiomyocytes. Animal studies ranging from zebrafish with 100% 1X2N cells in the adult to some strains of mice with up to 98% 2X2N cells in the adult and other species with variable ratios of 1X2N and 2X2N cells are reviewed relative to the time of conversion. Various structural, physiologic, metabolic, genetic, hormonal, oxygenation, and other factors that play a key role in the inability of post‐neonatal and adult myocytes to undergo additional cytokinesis are also reviewed.
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Affiliation(s)
- Sanford P Bishop
- Department of Biomedical Engineering, School of Medicine, School of Engineering The University of Alabama at Birmingham AL
| | - Yang Zhou
- Department of Biomedical Engineering, School of Medicine, School of Engineering The University of Alabama at Birmingham AL
| | - Yuji Nakada
- Department of Biomedical Engineering, School of Medicine, School of Engineering The University of Alabama at Birmingham AL
| | - Jianyi Zhang
- Department of Biomedical Engineering, School of Medicine, School of Engineering The University of Alabama at Birmingham AL
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36
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Zhu Y, Do VD, Richards AM, Foo R. What we know about cardiomyocyte dedifferentiation. J Mol Cell Cardiol 2020; 152:80-91. [PMID: 33275936 DOI: 10.1016/j.yjmcc.2020.11.016] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 11/22/2020] [Accepted: 11/27/2020] [Indexed: 12/16/2022]
Abstract
Cardiomyocytes (CMs) lost during cardiac injury and heart failure (HF) cannot be replaced due to their limited proliferative capacity. Regenerating the failing heart by promoting CM cell-cycle re-entry is an ambitious solution, currently vigorously pursued. Some genes have been proven to promote endogenous CM proliferation, believed to be preceded by CM dedifferentiation, wherein terminally differentiated CMs are initially reversed back to the less mature state which precedes cell division. However, very little else is known about CM dedifferentiation which remains poorly defined. We lack robust molecular markers and proper understanding of the mechanisms driving dedifferentiation. Even the term dedifferentiation is debated because there is no objective evidence of pluripotency, and could rather reflect CM plasticity instead. Nonetheless, the significance of CM transition states on cardiac function, and whether they necessarily lead to CM proliferation, remains unclear. This review summarises the current state of knowledge of both natural and experimentally induced CM dedifferentiation in non-mammalian vertebrates (primarily the zebrafish) and mammals, as well as the phenotypes and molecular mechanisms involved. The significance and potential challenges of studying CM dedifferentiation are also discussed. In summary, CM dedifferentiation, essential for CM plasticity, may have an important role in heart regeneration, thereby contributing to the prevention and treatment of heart disease. More attention is needed in this field to overcome the technical limitations and knowledge gaps.
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Affiliation(s)
- Yike Zhu
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore; Genome Institute of Singapore, Agency of Science Research and Technology, Singapore
| | - Vinh Dang Do
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore; Genome Institute of Singapore, Agency of Science Research and Technology, Singapore
| | - A Mark Richards
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore
| | - Roger Foo
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore; Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore; Genome Institute of Singapore, Agency of Science Research and Technology, Singapore.
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37
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Ryan R, Moyse BR, Richardson RJ. Zebrafish cardiac regeneration-looking beyond cardiomyocytes to a complex microenvironment. Histochem Cell Biol 2020; 154:533-548. [PMID: 32926230 PMCID: PMC7609419 DOI: 10.1007/s00418-020-01913-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2020] [Indexed: 02/07/2023]
Abstract
The study of heart repair post-myocardial infarction has historically focused on the importance of cardiomyocyte proliferation as the major factor limiting adult mammalian heart regeneration. However, there is mounting evidence that a narrow focus on this one cell type discounts the importance of a complex cascade of cell-cell communication involving a whole host of different cell types. A major difficulty in the study of heart regeneration is the rarity of this process in adult animals, meaning a mammalian template for how this can be achieved is lacking. Here, we review the adult zebrafish as an ideal and unique model in which to study the underlying mechanisms and cell types required to attain complete heart regeneration following cardiac injury. We provide an introduction to the role of the cardiac microenvironment in the complex regenerative process and discuss some of the key advances using this in vivo vertebrate model that have recently increased our understanding of the vital roles of multiple different cell types. Due to the sheer number of exciting studies describing new and unexpected roles for inflammatory cell populations in cardiac regeneration, this review will pay particular attention to these important microenvironment participants.
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Affiliation(s)
- Rebecca Ryan
- C21a, Biomedical Sciences Building, Faculty of Life Sciences, School of Physiology, Pharmacology and Neuroscience, University of Bristol, University Walk, Bristol, BS8 1TD, UK
| | - Bethany R Moyse
- C21a, Biomedical Sciences Building, Faculty of Life Sciences, School of Physiology, Pharmacology and Neuroscience, University of Bristol, University Walk, Bristol, BS8 1TD, UK
| | - Rebecca J Richardson
- C21a, Biomedical Sciences Building, Faculty of Life Sciences, School of Physiology, Pharmacology and Neuroscience, University of Bristol, University Walk, Bristol, BS8 1TD, UK.
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38
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Derks W, Murganti F, Bergmann O. Cardiomyocyte renewal in the failing heart: lessons from the neonate? Biophys Rev 2020; 12:785-787. [PMID: 32681468 PMCID: PMC7429587 DOI: 10.1007/s12551-020-00739-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/08/2020] [Indexed: 02/07/2023] Open
Affiliation(s)
- Wouter Derks
- Center for Regenerative Therapies Dresden, TU-Dresden, Fetscherstrasse 105, 01307, Dresden, Germany
| | - Francesca Murganti
- Center for Regenerative Therapies Dresden, TU-Dresden, Fetscherstrasse 105, 01307, Dresden, Germany
| | - Olaf Bergmann
- Center for Regenerative Therapies Dresden, TU-Dresden, Fetscherstrasse 105, 01307, Dresden, Germany. .,Karolinska Institutet, Biomedicum, Cell and Molecular Biology, SE-17177, Stockholm, Sweden.
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39
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Abstract
Maturation is the last phase of heart development that prepares the organ for strong, efficient, and persistent pumping throughout the mammal's lifespan. This process is characterized by structural, gene expression, metabolic, and functional specializations in cardiomyocytes as the heart transits from fetal to adult states. Cardiomyocyte maturation gained increased attention recently due to the maturation defects in pluripotent stem cell-derived cardiomyocyte, its antagonistic effect on myocardial regeneration, and its potential contribution to cardiac disease. Here, we review the major hallmarks of ventricular cardiomyocyte maturation and summarize key regulatory mechanisms that promote and coordinate these cellular events. With advances in the technical platforms used for cardiomyocyte maturation research, we expect significant progress in the future that will deepen our understanding of this process and lead to better maturation of pluripotent stem cell-derived cardiomyocyte and novel therapeutic strategies for heart disease.
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Affiliation(s)
- Yuxuan Guo
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA
| | - William Pu
- Department of Cardiology, Boston Children’s Hospital, Boston, MA 02115, USA
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA
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40
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Smith KA, Mommersteeg MTM. Talkin’ ‘bout regeneration: new advances in cardiac regeneration using the zebrafish. CURRENT OPINION IN PHYSIOLOGY 2020. [DOI: 10.1016/j.cophys.2019.12.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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41
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Ali H, Braga L, Giacca M. Cardiac regeneration and remodelling of the cardiomyocyte cytoarchitecture. FEBS J 2020; 287:417-438. [PMID: 31743572 DOI: 10.1111/febs.15146] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 09/27/2019] [Accepted: 11/18/2019] [Indexed: 12/13/2022]
Abstract
Adult mammals are unable to regenerate their hearts after cardiac injury, largely due to the incapacity of cardiomyocytes (CMs) to undergo cell division. However, mammalian embryonic and fetal CMs, similar to CMs from fish and amphibians during their entire life, exhibit robust replicative activity, which stops abruptly after birth and never significantly resumes. Converging evidence indicates that formation of the highly ordered and stable cytoarchitecture of mammalian mature CMs is coupled with loss of their proliferative potential. Here, we review the available information on the role of the cardiac cytoskeleton and sarcomere in the regulation of CM proliferation. The actin cytoskeleton, the intercalated disc, the microtubular network and the dystrophin-glycoprotein complex each sense mechanical cues from the surrounding environment. Furthermore, they participate in the regulation of CM proliferation by impinging on the yes-associated protein/transcriptional co-activator with PDZ-binding motif, β-catenin and myocardin-related transcription factor transcriptional co-activators. Mastering the molecular mechanisms regulating CM proliferation would permit the development of innovative strategies to stimulate cardiac regeneration in adult individuals, a hitherto unachieved yet fundamental therapeutic goal.
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Affiliation(s)
- Hashim Ali
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King's College London, UK.,Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Luca Braga
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King's College London, UK.,Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy
| | - Mauro Giacca
- British Heart Foundation Centre of Research Excellence, School of Cardiovascular Medicine & Sciences, King's College London, UK.,Molecular Medicine Laboratory, International Centre for Genetic Engineering and Biotechnology (ICGEB), Trieste, Italy.,Department of Medical, Surgical and Health Sciences, University of Trieste, Italy
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42
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Re-enforcing hypoxia-induced polyploid cardiomyocytes enter cytokinesis through activation of β-catenin. Sci Rep 2019; 9:17865. [PMID: 31780774 PMCID: PMC6883062 DOI: 10.1038/s41598-019-54334-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 11/08/2019] [Indexed: 01/01/2023] Open
Abstract
Cardiomyocyte (CM) loss is a characteristic of various heart diseases, including ischaemic heart disease. Cardiac regeneration has been suggested as a promising strategy to address CM loss. Although many studies of regeneration have focused mainly on mononucleated or diploid CM, the limitations associated with the cytokinesis of polyploid and multinucleated CMs remain less well known. Here, we show that β-catenin, a key regulator in heart development, can increase cytokinesis in polyploid multinucleated CMs. The activation of β-catenin increases the expression of the cytokinesis-related factor epithelial cell transforming 2 (ECT2), which regulates the actomyosin ring and thus leads to the completion of cytokinesis in polyploid CMs. In addition, hypoxia can induce polyploid and multinucleated CMs by increasing factors related to the G1-S-anaphase of the cell cycle, but not those related to cytokinesis. Our study therefore reveals that the β-catenin can promote the cytokinesis of polyploid multinucleated CMs via upregulation of ECT2. These findings suggest a potential field of polyploid CM research that may be exploitable for cardiac regeneration therapy.
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43
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Milliron HYY, Weiland MJ, Kort EJ, Jovinge S. Isolation of Cardiomyocytes Undergoing Mitosis With Complete Cytokinesis. Circ Res 2019; 125:1070-1086. [PMID: 31648614 DOI: 10.1161/circresaha.119.314908] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
RATIONALE Adult human cardiomyocytes do not complete cytokinesis despite passing through the S-phase of the cell cycle. As a result, polyploidization and multinucleation occur. To get a deeper understanding of the mechanisms surrounding division of cardiomyocytes, there is a crucial need for a technique to isolate cardiomyocytes that complete cell division/cytokinesis. OBJECTIVE Markers of cell cycle progression based on DNA content cannot distinguish between mitotic cardiomyocytes that fail to complete cytokinesis from those cells that undergo true cell division. With the use of molecular beacons (MBs) targeting specific mRNAs, we aimed to identify truly proliferative cardiomyocytes derived from human induced pluripotent stem cells. METHODS AND RESULTS Fluorescence-activated cell sorting combined with MBs was performed to sort cardiomyocyte populations enriched for mitotic cells. Expressions of cell cycle specific genes were confirmed by means of reverse transcription-quantitative polymerase chain reaction and single-cell RNA sequencing (scRNA-seq) combined with gene signatures of cell cycle progression. We characterized the sorted groups by proliferation assays and time-lapse microscopy which confirmed the proliferative advantage of MB-positive cell populations relative to MB-negative and G2/M populations. Gene expression analysis revealed that the MB-positive cardiomyocyte subpopulation exhibited patterns consistent with the processes of nuclear division, chromosome segregation, and transition from M to G1 phase. The use of dual-MBs targeting CDC20 and SPG20 mRNAs enabled the enrichment of cytokinetic events (CDC20highSPG20high). Interestingly, cells that did not complete cytokinesis and remained binucleated were found to be CDC20lowSPG20high while polyploid cardiomyocytes that replicated DNA but failed to complete karyokinesis were found to be CDC20lowSPG20low. CONCLUSIONS This study demonstrates a novel alternative to existing DNA content-based approaches for sorting cardiomyocytes with true mitotic potential that can be used to study the unique dynamics of cardiomyocyte nuclei during mitosis. Our technique for sorting live cardiomyocytes undergoing cytokinesis would provide a basis for future studies to uncover mechanisms underlying the development and regeneration of heart tissue.
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Affiliation(s)
- Hsiao-Yun Y Milliron
- From the DeVos Cardiovascular Program, Van Andel Research Institute and Fredrik Meijer Heart and Vascular Institute/Spectrum Health, Grand Rapids, MI (H.Y.M., M.J.W., E.J.K., S.J.)
| | - Matthew J Weiland
- From the DeVos Cardiovascular Program, Van Andel Research Institute and Fredrik Meijer Heart and Vascular Institute/Spectrum Health, Grand Rapids, MI (H.Y.M., M.J.W., E.J.K., S.J.)
| | - Eric J Kort
- From the DeVos Cardiovascular Program, Van Andel Research Institute and Fredrik Meijer Heart and Vascular Institute/Spectrum Health, Grand Rapids, MI (H.Y.M., M.J.W., E.J.K., S.J.).,Department of Pediatrics and Human Development, College of Human Medicine, Michigan State University, East Lansing (E.J.K.)
| | - Stefan Jovinge
- From the DeVos Cardiovascular Program, Van Andel Research Institute and Fredrik Meijer Heart and Vascular Institute/Spectrum Health, Grand Rapids, MI (H.Y.M., M.J.W., E.J.K., S.J.).,Cardiovascular Institute, Stanford University, Palo Alto, CA (S.J.)
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44
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Ben-Yair R, Butty VL, Busby M, Qiu Y, Levine SS, Goren A, Boyer LA, Burns CG, Burns CE. H3K27me3-mediated silencing of structural genes is required for zebrafish heart regeneration. Development 2019; 146:dev178632. [PMID: 31427288 PMCID: PMC6803378 DOI: 10.1242/dev.178632] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 08/07/2019] [Indexed: 12/13/2022]
Abstract
Deciphering the genetic and epigenetic regulation of cardiomyocyte proliferation in organisms that are capable of robust cardiac renewal, such as zebrafish, represents an attractive inroad towards regenerating the human heart. Using integrated high-throughput transcriptional and chromatin analyses, we have identified a strong association between H3K27me3 deposition and reduced sarcomere and cytoskeletal gene expression in proliferative cardiomyocytes following cardiac injury in zebrafish. To move beyond an association, we generated an inducible transgenic strain expressing a mutant version of histone 3, H3.3K27M, that inhibits H3K27me3 catalysis in cardiomyocytes during the regenerative window. Hearts comprising H3.3K27M-expressing cardiomyocytes fail to regenerate, with wound edge cells showing heightened expression of structural genes and prominent sarcomeres. Although cell cycle re-entry was unperturbed, cytokinesis and wound invasion were significantly compromised. Collectively, our study identifies H3K27me3-mediated silencing of structural genes as requisite for zebrafish heart regeneration and suggests that repression of similar structural components in the border zone of an infarcted human heart might improve its regenerative capacity.
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Affiliation(s)
- Raz Ben-Yair
- Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA 02129, USA
- Harvard Medical School, Boston, MA 02115, USA
| | - Vincent L Butty
- Departments of Biology and Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Michele Busby
- The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Yutong Qiu
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Stuart S Levine
- Departments of Biology and Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Alon Goren
- The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
- Department of Medicine, University of California San Diego, La Jolla, CA 92093, USA
| | - Laurie A Boyer
- Departments of Biology and Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - C Geoffrey Burns
- Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA 02129, USA
- Harvard Medical School, Boston, MA 02115, USA
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA
| | - Caroline E Burns
- Cardiovascular Research Center, Massachusetts General Hospital, Charlestown, MA 02129, USA
- Harvard Medical School, Boston, MA 02115, USA
- Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA
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45
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Vujic A, Natarajan N, Lee RT. Molecular mechanisms of heart regeneration. Semin Cell Dev Biol 2019; 100:20-28. [PMID: 31587963 DOI: 10.1016/j.semcdb.2019.09.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Revised: 08/20/2019] [Accepted: 09/11/2019] [Indexed: 12/27/2022]
Abstract
The adult mammalian heart is incapable of clinically relevant regeneration. The regenerative deficit in adult mammalian heart contrasts with the fetal and neonatal heart, which demonstrate substantial regenerative capacity after injury. This deficiency in adult mammals is attributable to the lack of resident stem cells after birth, combined with an inability of pre-existing cardiomyocytes to complete cytokinesis. Studies of neonatal heart regeneration in mammals suggest that latent regenerative potential can be re-activated. Dissecting the cellular and molecular mechanisms that promote cardiomyocyte proliferation is key to stimulating true regeneration in adult humans. Here, we review recent advances in our understanding of cardiomyocyte proliferation that suggest molecular approaches to heart regeneration.
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Affiliation(s)
- Ana Vujic
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, Cambridge, MA, 02138, USA
| | - Niranjana Natarajan
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, Cambridge, MA, 02138, USA
| | - Richard T Lee
- Department of Stem Cell and Regenerative Biology and the Harvard Stem Cell Institute, Harvard University, Cambridge, MA, 02138, USA; Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, 02115, USA.
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46
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Landim-Vieira M, Schipper JM, Pinto JR, Chase PB. Cardiomyocyte nuclearity and ploidy: when is double trouble? J Muscle Res Cell Motil 2019; 41:329-340. [PMID: 31317457 DOI: 10.1007/s10974-019-09545-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 07/12/2019] [Indexed: 01/23/2023]
Abstract
Considerable effort has gone into investigating mechanisms that underlie the developmental transition in which mammalian cardiomyocytes (CMs) switch from being able to proliferate during development, to essentially having lost that ability at maturity. This problem is interesting not only for scientific curiosity, but also for its clinical relevance because controlling the ability of mature CMs to replicate would provide a much-needed approach for restoring cardiac function in damaged hearts. In this review, we focus on the propensity of mature mammalian CMs to be multinucleated and polyploid, and the extent to which this may be necessary for normal physiology yet possibly disadvantageous in some circumstances. In this context, we explore whether the concept of the myonuclear domain (MND) in multinucleated skeletal muscle fibers might apply to cardiomyocytes, and whether cardio-MND size might be related to the transition of CMs to become multinuclear. Nuclei in CMs are almost certainly integrators of not only biochemical, but also-because of their central location within the myofibrils-mechanical information, and this multimodal, integrative function in adult CMs-involving molecules that have been extensively studied along with newly identified possibilities-could influence both gene expression as well as replication of the genome and the nuclei themselves.
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Affiliation(s)
- Maicon Landim-Vieira
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA
| | - Joslyn M Schipper
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA.,Department of Biological Science, Florida State University, Tallahassee, FL, USA
| | - J Renato Pinto
- Department of Biomedical Sciences, College of Medicine, Florida State University, Tallahassee, FL, USA
| | - P Bryant Chase
- Department of Biological Science, Florida State University, Tallahassee, FL, USA. .,Department of Biological Science, Florida State University, Biology Unit One Room 206, 81 Chieftain Way, Tallahassee, FL, 32306-4370, USA.
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47
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Cardioprotective microRNAs: Lessons from stem cell-derived exosomal microRNAs to treat cardiovascular disease. Atherosclerosis 2019; 285:1-9. [PMID: 30939341 DOI: 10.1016/j.atherosclerosis.2019.03.016] [Citation(s) in RCA: 158] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/28/2019] [Accepted: 03/21/2019] [Indexed: 12/20/2022]
Abstract
The stem cell-based therapy has emerged as a promising therapeutic strategy for treating cardiovascular ischemic diseases (CVIDs), such as myocardial infarction (MI). However, some important functional shortcomings of stem cell transplantation, such as immune rejection, tumorigenicity and infusional toxicity, have overshadowed stem cell therapy in the setting of cardiovascular diseases (CVDs). Accumulating evidence suggests that the therapeutic effects of transplanted stem cells are predominately mediated by secreting paracrine factors, importantly, microRNAs (miRs) present in the secreted exosomes. Therefore, novel cell-free therapy based on the stem cell-secreted exosomal miRs can be considered as a safe and effective alternative tool to stem cell therapy for the treatment of CVDs. Stem cell-derived miRs have recently been found to transfer, via exosomes, from a transplanted stem cell into a recipient cardiac cell, where they regulate various cellular process, such as proliferation, apoptosis, stress responses, as well as differentiation and angiogenesis. The present review aimed to summarize cardioprotective exosomal miRs secreted by transplanted stem cells from various sources, including embryonic stem cells (ESCs), induced pluripotent stem cells (iPSCs), mesenchymal stem cells (MSCs), and cardiac stem/progenitor cells, which showed beneficial modulatory effects on the myocardial infracted heart. In summary, stem cell-exosomal miRs, including miR-19a, mirR-21, miR-21-5p, miR-21-a5p, miR-22 miR-24, miR-26a, miR-29, miR-125b-5p, miR-126, miR-201, miR-210, and miR-294, have been shown to have cardioprotective effects by enhancing cardiomyocyte survival and function and attenuating cardiac fibrosis. Additionally, MCS-exosomal miRs, including miR-126, miR-210, miR-21, miR-23a-3p and miR-130a-3p, are found to exert cardioprotective effects through induction of angiogenesis in ischemic heart after MI.
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Monroe TO, Hill MC, Morikawa Y, Leach JP, Heallen T, Cao S, Krijger PHL, de Laat W, Wehrens XHT, Rodney GG, Martin JF. YAP Partially Reprograms Chromatin Accessibility to Directly Induce Adult Cardiogenesis In Vivo. Dev Cell 2019; 48:765-779.e7. [PMID: 30773489 DOI: 10.1016/j.devcel.2019.01.017] [Citation(s) in RCA: 192] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 12/10/2018] [Accepted: 01/17/2019] [Indexed: 01/22/2023]
Abstract
Specialized adult somatic cells, such as cardiomyocytes (CMs), are highly differentiated with poor renewal capacity, an integral reason underlying organ failure in disease and aging. Among the least renewable cells in the human body, CMs renew approximately 1% annually. Consistent with poor CM turnover, heart failure is the leading cause of death. Here, we show that an active version of the Hippo pathway effector YAP, termed YAP5SA, partially reprograms adult mouse CMs to a more fetal and proliferative state. One week after induction, 19% of CMs that enter S-phase do so twice, CM number increases by 40%, and YAP5SA lineage CMs couple to pre-existing CMs. Genomic studies showed that YAP5SA increases chromatin accessibility and expression of fetal genes, partially reprogramming long-lived somatic cells in vivo to a primitive, fetal-like, and proliferative state.
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Affiliation(s)
- Tanner O Monroe
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Matthew C Hill
- Program in Developmental Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Yuka Morikawa
- Cardiomyocyte Renewal Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX 77030, USA
| | - John P Leach
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Todd Heallen
- Cardiomyocyte Renewal Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX 77030, USA
| | - Shuyi Cao
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA; Cardiovascular Research Institute, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - Peter H L Krijger
- Oncode Institute, Hubrecht Institute-KNAW, Utrecht, the Netherlands; University Medical Center Utrecht, Utrecht, the Netherlands
| | - Wouter de Laat
- Oncode Institute, Hubrecht Institute-KNAW, Utrecht, the Netherlands; University Medical Center Utrecht, Utrecht, the Netherlands
| | - Xander H T Wehrens
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA; Cardiovascular Research Institute, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - George G Rodney
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA; Cardiovascular Research Institute, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA
| | - James F Martin
- Department of Molecular Physiology and Biophysics, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA; Cardiomyocyte Renewal Laboratory, Texas Heart Institute, 6770 Bertner Avenue, Houston, TX 77030, USA; Program in Developmental Biology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA; Cardiovascular Research Institute, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, USA.
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Jackman C, Li H, Bursac N. Long-term contractile activity and thyroid hormone supplementation produce engineered rat myocardium with adult-like structure and function. Acta Biomater 2018; 78:98-110. [PMID: 30086384 DOI: 10.1016/j.actbio.2018.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/02/2018] [Accepted: 08/03/2018] [Indexed: 02/07/2023]
Abstract
The field of cardiac tissue engineering has developed rapidly, but structural and functional immaturity of engineered heart tissues hinder their widespread use. Here, we show that a combination of low-rate (0.2 Hz) contractile activity and thyroid hormone (T3) supplementation significantly promote structural and functional maturation of engineered rat cardiac tissues ("cardiobundles"). The progressive maturation of cardiobundles during first 2 weeks of culture resulted in cell cycle exit and loss of spontaneous activity, which in longer culture yielded decreased contractile function. Maintaining a low level of contractile activity by 0.2 Hz pacing between culture weeks 3 and 5, combined with T3 treatment, yielded significant growth of cardiobundle and myocyte cross-sectional areas (by 68% and 32%, respectively), increased nuclei numbers (by 22%), improved twitch force (by 39%), shortened action potential duration (by 32%), polarized N-cadherin distribution, and switch from immature (slow skeletal) to mature (fast) cardiac troponin I isoform expression. Along with advanced functional output (conduction velocity 53.7 ± 0.8 cm/s, specific force 70.1 ± 5.8 mN/mm2), quantitative ultrastructural analyses revealed similar metrics and abundance of sarcomeres, T-tubules, M-bands, and intercalated disks compared to native age-matched (5-week) and adult (3-month) ventricular myocytes. Unlike 0.2 Hz regime, chronic 1 Hz pacing resulted in significant cardiomyocyte loss and formation of necrotic core despite the use of dynamic culture. Overall, our results demonstrate remarkable ultrastructural and functional maturation of neonatal rat cardiomyocytes in 3D culture and reveal importance of combined biophysical and hormonal inputs for in vitro engineering of adult-like myocardium. STATEMENT OF SIGNIFICANCE Compared to human stem cell-derived cardiomyocytes, neonatal rat ventricular myocytes show advanced maturation state which makes them suitable for in vitro studies of postnatal cardiac development. Still, maturation process from a neonatal to an adult cardiomyocyte has not been recapitulated in rodent cell cultures. Here, we show that low-frequency pacing and thyroid hormone supplementation of 3D engineered neonatal rat cardiac tissues synergistically yield significant increase in cell and tissue volume, robust formation of T-tubules and M-lines, improved sarcomere organization, and faster and more forceful contractions. To the best of our knowledge, 5-week old engineered cardiac tissues described in this study are the first that exhibit both ultrastructural and functional characteristics approaching or matching those of adult ventricular myocardium.
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Uribe V, Ramadass R, Dogra D, Rasouli SJ, Gunawan F, Nakajima H, Chiba A, Reischauer S, Mochizuki N, Stainier DYR. In vivo analysis of cardiomyocyte proliferation during trabeculation. Development 2018; 145:145/14/dev164194. [PMID: 30061167 DOI: 10.1242/dev.164194] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 06/16/2018] [Indexed: 12/18/2022]
Abstract
Cardiomyocyte proliferation is crucial for cardiac growth, patterning and regeneration; however, few studies have investigated the behavior of dividing cardiomyocytes in vivo Here, we use time-lapse imaging of beating hearts in combination with the FUCCI system to monitor the behavior of proliferating cardiomyocytes in developing zebrafish. Confirming in vitro observations, sarcomere disassembly, as well as changes in cell shape and volume, precede cardiomyocyte cytokinesis. Notably, cardiomyocytes in zebrafish embryos and young larvae mostly divide parallel to the myocardial wall in both the compact and trabecular layers, and cardiomyocyte proliferation is more frequent in the trabecular layer. While analyzing known regulators of cardiomyocyte proliferation, we observed that the Nrg/ErbB2 and TGFβ signaling pathways differentially affect compact and trabecular layer cardiomyocytes, indicating that distinct mechanisms drive proliferation in these two layers. In summary, our data indicate that, in zebrafish, cardiomyocyte proliferation is essential for trabecular growth, but not initiation, and set the stage to further investigate the cellular and molecular mechanisms driving cardiomyocyte proliferation in vivo.
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Affiliation(s)
- Veronica Uribe
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Radhan Ramadass
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Deepika Dogra
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - S Javad Rasouli
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Felix Gunawan
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Hiroyuki Nakajima
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka 565-8565, Japan
| | - Ayano Chiba
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka 565-8565, Japan
| | - Sven Reischauer
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
| | - Naoki Mochizuki
- Department of Cell Biology, National Cerebral and Cardiovascular Center Research Institute, 5-7-1 Fujishirodai, Suita, Osaka 565-8565, Japan
| | - Didier Y R Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, 61231 Bad Nauheim, Germany
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