1
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Bongiovanni C, Bueno-Levy H, Posadas Pena D, Del Bono I, Miano C, Boriati S, Da Pra S, Sacchi F, Redaelli S, Bergen M, Romaniello D, Pontis F, Tassinari R, Kellerer L, Petraroia I, Mazzeschi M, Lauriola M, Ventura C, Heermann S, Weidinger G, Tzahor E, D'Uva G. BMP7 promotes cardiomyocyte regeneration in zebrafish and adult mice. Cell Rep 2024; 43:114162. [PMID: 38678558 DOI: 10.1016/j.celrep.2024.114162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 03/06/2024] [Accepted: 04/11/2024] [Indexed: 05/01/2024] Open
Abstract
Zebrafish have a lifelong cardiac regenerative ability after damage, whereas mammals lose this capacity during early postnatal development. This study investigated whether the declining expression of growth factors during postnatal mammalian development contributes to the decrease of cardiomyocyte regenerative potential. Besides confirming the proliferative ability of neuregulin 1 (NRG1), interleukin (IL)1b, receptor activator of nuclear factor kappa-Β ligand (RANKL), insulin growth factor (IGF)2, and IL6, we identified other potential pro-regenerative factors, with BMP7 exhibiting the most pronounced efficacy. Bmp7 knockdown in neonatal mouse cardiomyocytes and loss-of-function in adult zebrafish during cardiac regeneration reduced cardiomyocyte proliferation, indicating that Bmp7 is crucial in the regenerative stages of mouse and zebrafish hearts. Conversely, bmp7 overexpression in regenerating zebrafish or administration at post-mitotic juvenile and adult mouse stages, in vitro and in vivo following myocardial infarction, enhanced cardiomyocyte cycling. Mechanistically, BMP7 stimulated proliferation through BMPR1A/ACVR1 and ACVR2A/BMPR2 receptors and downstream SMAD5, ERK, and AKT signaling. Overall, BMP7 administration is a promising strategy for heart regeneration.
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Affiliation(s)
- Chiara Bongiovanni
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Hanna Bueno-Levy
- Department of Molecular Cell Biology, Weizmann Institute of Science, Herzl St. 234, Rehovot 76100, Israel
| | - Denise Posadas Pena
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Irene Del Bono
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Carmen Miano
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Stefano Boriati
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Silvia Da Pra
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Francesca Sacchi
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Simone Redaelli
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Max Bergen
- Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Albertstrasse 17, 79104 Freiburg, Germany
| | - Donatella Romaniello
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Francesca Pontis
- Scientific and Technological Pole, IRCCS MultiMedica, via Fantoli 16/15, 20138 Milan, Italy
| | | | - Laura Kellerer
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Ilaria Petraroia
- Scientific and Technological Pole, IRCCS MultiMedica, via Fantoli 16/15, 20138 Milan, Italy
| | - Martina Mazzeschi
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Mattia Lauriola
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Carlo Ventura
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Stephan Heermann
- Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Albertstrasse 17, 79104 Freiburg, Germany
| | - Gilbert Weidinger
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Eldad Tzahor
- Department of Molecular Cell Biology, Weizmann Institute of Science, Herzl St. 234, Rehovot 76100, Israel
| | - Gabriele D'Uva
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; IRCCS Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italy.
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2
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Talebipour A, Saviz M, Vafaiee M, Faraji-Dana R. Facilitating long-term cell examinations and time-lapse recordings in cell biology research with CO 2 mini-incubators. Sci Rep 2024; 14:3418. [PMID: 38341451 PMCID: PMC10858865 DOI: 10.1038/s41598-024-52866-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Accepted: 01/24/2024] [Indexed: 02/12/2024] Open
Abstract
In recent years, microscopy has revolutionized the study of dynamic living cells. However, performing long-term live cell imaging requires stable environmental conditions such as temperature, pH, and humidity. While standard incubators have traditionally provided these conditions, other solutions, like stagetop incubators are available. To further enhance the accessibility of stable cell culture environments for live cell imaging, we developed a portable CO2 cell culture mini-incubator that can be easily adapted to any x-y inverted microscope stage, enabling long-term live cell imaging. This mini-incubator provides and maintains stable environmental conditions and supports cell viability comparable to standard incubators. Moreover, it allows for parallel experiments in the same environment, saving both time and resources. To demonstrate its functionality, different cell lines (VERO and MDA-MB-231) were cultured and evaluated using various assays, including crystal violet staining, MTT, and flow cytometry tests to assess cell adhesion, viability, and apoptosis, respectively. Time-lapse imaging was performed over an 85-h period with MDA-MB-231 cells cultured in the mini-incubator. The results indicate that this device is a viable solution for long-term imaging and can be applied in developmental biology, cell biology, and cancer biology research where long-term time-lapse recording is required.
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Affiliation(s)
- Ali Talebipour
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran
| | - Mehrdad Saviz
- Department of Biomedical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran.
| | - Mohaddeseh Vafaiee
- Institute for Nanoscience and Nanotechnology, Sharif University of Technology, Tehran, Iran
| | - Reza Faraji-Dana
- Center of Excellence on Applied Electromagnetic Systems, School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran
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3
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Park S, Huang H, Ross I, Moreno J, Khyeam S, Simmons J, Huang GN, Payumo AY. Quantitative Three-dimensional Label-free Digital Holographic Imaging of Cardiomyocyte Size, Ploidy, and Cell Division. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.02.565407. [PMID: 37961676 PMCID: PMC10635088 DOI: 10.1101/2023.11.02.565407] [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
Cardiac regeneration in newborn rodents depends on the ability of pre-existing cardiomyocytes to proliferate and divide. This capacity is lost within the first week of postnatal development when these cells rapidly switch from hyperplasia to hypertrophy, withdraw from the cell cycle, become binucleated, and increase in size. How these dynamic changes in size and ploidy impact cardiomyocyte proliferative potential is not well understood. In this study, we innovate the application of a commercially available digital holographic imaging microscope, the Holomonitor M4, to evaluate the proliferative responses of mononucleated diploid and binucleated tetraploid cardiomyocytes. This instrument coupled with the powerful Holomonitor App Suite software enables long-term label-free quantitative three-dimensional tracking of primary cardiomyocyte dynamics in real-time with single-cell resolution. Our digital holographic imaging results provide direct evidence that mononucleated cardiomyocytes retain significant proliferative potential as most can successfully divide with high frequency. In contrast, binucleated cardiomyocytes exhibit a blunted response to a proliferative stimulus with the majority not attempting to divide at all. Nevertheless, some binucleated cardiomyocytes were capable of complete division, suggesting that these cells still do retain limited proliferative capacity. By quantitatively tracking cardiomyocyte volume dynamics during these proliferative responses, we reveal that both mononucleated and binucleated cells reach a unique size threshold prior to attempted cell division. The absolute threshold is increased by binucleation, which may limit the ability of binucleated cardiomyocytes to divide. By defining the interrelationship between cardiomyocyte size, ploidy, and cell cycle control, we will better understand the cellular mechanisms that drive the loss of mammalian cardiac regenerative capacity after birth.
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4
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Lyons AC, Mehta S, Zhang J. Fluorescent biosensors illuminate the spatial regulation of cell signaling across scales. Biochem J 2023; 480:1693-1717. [PMID: 37903110 PMCID: PMC10657186 DOI: 10.1042/bcj20220223] [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] [Received: 03/24/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 11/01/2023]
Abstract
As cell signaling research has advanced, it has become clearer that signal transduction has complex spatiotemporal regulation that goes beyond foundational linear transduction models. Several technologies have enabled these discoveries, including fluorescent biosensors designed to report live biochemical signaling events. As genetically encoded and live-cell compatible tools, fluorescent biosensors are well suited to address diverse cell signaling questions across different spatial scales of regulation. In this review, methods of examining spatial signaling regulation and the design of fluorescent biosensors are introduced. Then, recent biosensor developments that illuminate the importance of spatial regulation in cell signaling are highlighted at several scales, including membranes and organelles, molecular assemblies, and cell/tissue heterogeneity. In closing, perspectives on how fluorescent biosensors will continue enhancing cell signaling research are discussed.
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Affiliation(s)
- Anne C. Lyons
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, U.S.A
- Shu Chien-Gene Lay Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Sohum Mehta
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, U.S.A
| | - Jin Zhang
- Department of Pharmacology, University of California, San Diego, La Jolla, CA 92093, U.S.A
- Shu Chien-Gene Lay Department of Bioengineering, University of California, San Diego, La Jolla, CA 92093, U.S.A
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, CA 92093, U.S.A
- Moores Cancer Center, University of California, San Diego, La Jolla, CA 92093, U.S.A
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5
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Kasamoto M, Funakoshi S, Hatani T, Okubo C, Nishi Y, Tsujisaka Y, Nishikawa M, Narita M, Ohta A, Kimura T, Yoshida Y. Am80, a retinoic acid receptor agonist, activates the cardiomyocyte cell cycle and enhances engraftment in the heart. Stem Cell Reports 2023; 18:1672-1685. [PMID: 37451261 PMCID: PMC10444569 DOI: 10.1016/j.stemcr.2023.06.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/12/2023] [Accepted: 06/13/2023] [Indexed: 07/18/2023] Open
Abstract
Human induced pluripotent stem cell-derived (hiPSC) cardiomyocytes are a promising source for regenerative therapy. To realize this therapy, however, their engraftment potential after their injection into the host heart should be improved. Here, we established an efficient method to analyze the cell cycle activity of hiPSC cardiomyocytes using a fluorescence ubiquitination-based cell cycle indicator (FUCCI) system. In vitro high-throughput screening using FUCCI identified a retinoic acid receptor (RAR) agonist, Am80, as an effective cell cycle activator in hiPSC cardiomyocytes. The transplantation of hiPSC cardiomyocytes treated with Am80 before the injection significantly enhanced the engraftment in damaged mouse heart for 6 months. Finally, we revealed that the activation of endogenous Wnt pathways through both RARA and RARB underlies the Am80-mediated cell cycle activation. Collectively, this study highlights an efficient method to activate cell cycle in hiPSC cardiomyocytes by Am80 as a means to increase the graft size after cell transplantation into a damaged heart.
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Affiliation(s)
- Manabu Kasamoto
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Department of Cardiovascular Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Shunsuke Funakoshi
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Takeda-CiRA Joint program (T-CiRA), Fujisawa, Japan.
| | - Takeshi Hatani
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Chikako Okubo
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Yohei Nishi
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Yuta Tsujisaka
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Department of Cardiovascular Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Misato Nishikawa
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Megumi Narita
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Akira Ohta
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan
| | - Takeshi Kimura
- Department of Cardiovascular Medicine, Kyoto University Hospital, Kyoto, Japan
| | - Yoshinori Yoshida
- Centre for iPS Cell Research and Application, Kyoto University, Kyoto, Japan; Takeda-CiRA Joint program (T-CiRA), Fujisawa, Japan.
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6
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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: 6] [Impact Index Per Article: 6.0] [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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7
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Murganti F, Derks W, Baniol M, Simonova I, Trus P, Neumann K, Khattak S, Guan K, Bergmann O. FUCCI-Based Live Imaging Platform Reveals Cell Cycle Dynamics and Identifies Pro-proliferative Compounds in Human iPSC-Derived Cardiomyocytes. Front Cardiovasc Med 2022; 9:840147. [PMID: 35548410 PMCID: PMC9081338 DOI: 10.3389/fcvm.2022.840147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 03/16/2022] [Indexed: 01/23/2023] Open
Abstract
One of the major goals in cardiac regeneration research is to replace lost ventricular tissue with new cardiomyocytes. However, cardiomyocyte proliferation drops to low levels in neonatal hearts and is no longer efficient in compensating for the loss of functional myocardium in heart disease. We generated a human induced pluripotent stem cell (iPSC)-derived cardiomyocyte-specific cell cycle indicator system (TNNT2-FUCCI) to characterize regular and aberrant cardiomyocyte cycle dynamics. We visualized cell cycle progression in TNNT2-FUCCI and found G2 cycle arrest in endoreplicating cardiomyocytes. Moreover, we devised a live-cell compound screening platform to identify pro-proliferative drug candidates. We found that the alpha-adrenergic receptor agonist clonidine induced cardiomyocyte proliferation in vitro and increased cardiomyocyte cell cycle entry in neonatal mice. In conclusion, the TNNT2-FUCCI system is a versatile tool to characterize cardiomyocyte cell cycle dynamics and identify pro-proliferative candidates with regenerative potential in the mammalian heart.
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Affiliation(s)
| | - Wouter Derks
- Center for Regenerative Therapies Dresden, TU Dresden, Dresden, Germany
| | - Marion Baniol
- Karolinska Institute, Cell and Molecular Biology (CMB), Stockholm, Sweden
| | - Irina Simonova
- Center for Regenerative Therapies Dresden, TU Dresden, Dresden, Germany
| | - Palina Trus
- Center for Regenerative Therapies Dresden, TU Dresden, Dresden, Germany
| | - Katrin Neumann
- Center for Regenerative Therapies Dresden, TU Dresden, Dresden, Germany
| | - Shahryar Khattak
- Center for Regenerative Therapies Dresden, TU Dresden, Dresden, Germany
- Royal College of Surgeons Ireland (RCSI) in Bahrain, Adliya, Bahrain
| | - Kaomei Guan
- Institute of Pharmacology and Toxicology, TU Dresden, Dresden, Germany
| | - Olaf Bergmann
- Center for Regenerative Therapies Dresden, TU Dresden, Dresden, Germany
- Karolinska Institute, Cell and Molecular Biology (CMB), Stockholm, Sweden
- *Correspondence: Olaf Bergmann
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8
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Identification and characterization of distinct cell cycle stages in cardiomyocytes using the FUCCI transgenic system. Exp Cell Res 2021; 408:112880. [PMID: 34655601 DOI: 10.1016/j.yexcr.2021.112880] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 10/07/2021] [Accepted: 10/10/2021] [Indexed: 11/20/2022]
Abstract
Understanding the regulatory mechanism by which cardiomyocyte proliferation transitions to endoreplication and cell cycle arrest during the neonatal period is crucial for identifying proproliferative factors and developing regenerative therapies. We used a transgenic mouse model based on the fluorescent ubiquitination-based cell cycle indicator (FUCCI) system to isolate and characterize cycling cardiomyocytes at different cell cycle stages at a single-cell resolution. Single-cell transcriptome analysis of cycling and noncycling cardiomyocytes was performed at postnatal days 0 (P0) and 7 (P7). The FUCCI system proved to be efficient for the identification of cycling cardiomyocytes with the highest mitotic activity at birth, followed by a gradual decline in the number of cycling and mitotic cardiomyocytes during the neonatal period. Cardiomyocytes showed premature cell cycle exit at G1/S shortly after birth and delayed G1/S progression during endoreplication at P7. Single-cell RNA-seq confirmed previously described signaling pathways involved in cardiomyocyte proliferation (Erbb2 and Hippo/YAP), and maturation-related transcriptional changes during postnatal development, including the metabolic switch from glycolysis to fatty acid oxidation in cardiomyocytes. Importantly, we generated transcriptional profiles specific to cell division and endoreplication in cardiomyocytes at different developmental stages that may facilitate the identification of genes important for adult cardiomyocyte proliferation and heart regeneration. In conclusion, the FUCCI mouse provides a valuable system to study cardiomyocyte cell cycle activity at single cell resolution that can help to decipher the switch from cardiomyocyte proliferation to endoreplication, and to revert this process to facilitate endogenous repair.
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9
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Strash N, DeLuca S, Janer Carattini GL, Heo SC, Gorsuch R, Bursac N. Human Erbb2-induced Erk activity robustly stimulates cycling and functional remodeling of rat and human cardiomyocytes. eLife 2021; 10:65512. [PMID: 34665129 PMCID: PMC8589446 DOI: 10.7554/elife.65512] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 10/19/2021] [Indexed: 12/17/2022] Open
Abstract
Multiple mitogenic pathways capable of promoting mammalian cardiomyocyte (CM) proliferation have been identified as potential candidates for functional heart repair following myocardial infarction. However, it is unclear whether the effects of these mitogens are species-specific and how they directly compare in the same cardiac setting. Here, we examined how CM-specific lentiviral expression of various candidate mitogens affects human induced pluripotent stem cell-derived CMs (hiPSC-CMs) and neonatal rat ventricular myocytes (NRVMs) in vitro. In 2D-cultured CMs from both species, and in highly mature 3D-engineered cardiac tissues generated from NRVMs, a constitutively active mutant form of the human gene Erbb2 (cahErbb2) was the most potent tested mitogen. Persistent expression of cahErbb2 induced CM proliferation, sarcomere loss, and remodeling of tissue structure and function, which were attenuated by small molecule inhibitors of Erk signaling. These results suggest transient activation of Erbb2/Erk axis in CMs as a potential strategy for regenerative heart repair.
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Affiliation(s)
- Nicholas Strash
- Department of Cell Biology, Duke University, Durham, United States
| | - Sophia DeLuca
- Department of Cell Biology, Duke University, Durham, United States
| | | | - Soon Chul Heo
- Department of Biomedical Engineering, Duke University, Durham, United States
| | - Ryne Gorsuch
- Department of Biomedical Engineering, Duke University, Durham, United States
| | - Nenad Bursac
- Department of Cell Biology, Duke University, Durham, United States.,Department of Biomedical Engineering, Duke University, Durham, United States
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10
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METTL3 improves cardiomyocyte proliferation upon myocardial infarction via upregulating miR-17-3p in a DGCR8-dependent manner. Cell Death Discov 2021; 7:291. [PMID: 34645805 PMCID: PMC8514505 DOI: 10.1038/s41420-021-00688-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 09/08/2021] [Accepted: 09/24/2021] [Indexed: 11/08/2022] Open
Abstract
Myocardial infarction (MI), one of the most severe types of heart attack, exerts a strong negative effect on heart muscle by causing a massive and rapid loss of cardiomyocytes. However, the existing therapies do little to improve cardiac regeneration. Due to the role of methyltransferase-like 3 (METTL3) in the physiological proliferation of cardiomyocytes, we aimed to determine whether METTL3 could also promote cardiomyocyte proliferation under pathological conditions and to elucidate the underlying mechanism. The effects of METTL3 on cardiomyocyte proliferation and apoptosis were investigated in an in vivo rat model of MI and in an in vitro model of neonatal rat cardiomyocytes (NRCMs) exposed to hypoxia. We found that METTL3 expression was downregulated in hypoxia-exposed NRCMs and MI-induced rats. Furthermore, METTL3 pretreatment enhanced cardiomyocyte proliferation and inhibited cardiomyocyte apoptosis under hypoxic or MI conditions, and silencing METTL3 had the opposite effects. Additionally, METTL3 overexpression upregulated miR-17-3p expression. The miR-17-3p agomir mimicked the pro-proliferative and antiapoptotic effects of METTL3 in hypoxia-exposed cells or rats with MI, while the miR-17-3p antagomir blocked these effects. Additionally, pretreatment with the RNA-binding protein DGCR8 also hampered the protective role of METTL3 in hypoxia-exposed cells. Overall, the current study indicated that METTL3 could improve cardiomyocyte proliferation and subsequently ameliorate MI in rats by upregulating proliferation-related miR-17-3p in a DGCR8-dependent pri-miRNA-processing manner.
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11
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Narematsu M, Nakajima Y. The early embryonic heart regenerates by compensation of proliferating residual cardiomyocytes after cryoinjury. Cell Tissue Res 2021; 384:757-769. [PMID: 33830297 DOI: 10.1007/s00441-021-03431-w] [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: 08/31/2020] [Accepted: 02/03/2021] [Indexed: 10/21/2022]
Abstract
The adult mammalian heart is non-regenerative because cardiomyocytes withdraw from the cell cycle shortly after birth. Embryonic mammalian hearts, in which cardiomyocytes are genetically ablated in a salt-and-pepper-like pattern, regenerate due to compensation by residual cardiomyocytes. To date, it remains unknown whether or how transmural ventricular defects at the looped heart stage regenerate after cryoinjury. We established a cryoablation model in stage 16 chick embryonic hearts. In hearts at 5 h post cryoinjury (hpc), cryoinjury-induced defects were approximately 200 µm in width in the primitive ventricle; thereafter, the defect was filled with mesenchymal cells accumulating between the epicardium and endocardium. The defect began to regress at 4 days post cryoinjury (dpc) and disappeared around 9 dpc. Immunohistochemistry showed that there were no isl1-positive cells in either the scar tissue or residual cardiomyocytes. BrdU incorporation into residual cardiomyocytes was transiently downregulated in association with upregulation of p27 (Kip1), suggesting that cell cycle arrest occurred at G1-to-S transition immediately after cryoinjury. Estimated cell cycle length was examined, and the results showed that the shortest cell cycle length was 18 h at stages 19-23; it increased with development due to elongation of the G2-M-G1 phase and 30 h at stages 27-29. The S phase length was constant at 6-8 h. The cell cycle length was elongated immediately after cryoinjury, and it reversed at 1-2 dpc. Cryoablated transmural defects in the early embryonic heart were restored by compensation by residual myocytes.
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Affiliation(s)
- Mayu Narematsu
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahimach, Abenoku, Osaka, 545-8585, Japan
| | - Yuji Nakajima
- Department of Anatomy and Cell Biology, Graduate School of Medicine, Osaka City University, 1-4-3 Asahimach, Abenoku, Osaka, 545-8585, Japan.
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12
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Wu CC, Jeratsch S, Graumann J, Stainier DYR. Modulation of Mammalian Cardiomyocyte Cytokinesis by the Extracellular Matrix. Circ Res 2020; 127:896-907. [PMID: 32564729 DOI: 10.1161/circresaha.119.316303] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE After birth, cycling mammalian CMs (cardiomyocytes) progressively lose the ability to undergo cytokinesis and hence they become binucleated, which leads to cell cycle exit and loss of regenerative capacity. During late embryonic and early postnatal heart growth, CM development is accompanied by an expansion of the cardiac fibroblast (cFb) population and compositional changes in the ECM (extracellular matrix). Whether and how these changes influence cardiomyocyte cytokinesis is currently unknown. OBJECTIVE To elucidate the role of postnatal cFbs and the ECM in cardiomyocyte cytokinesis and identify ECM proteins that promote cardiomyocyte cytokinesis. METHODS AND RESULTS Using primary rat cardiomyocyte cultures, we found that a proportion of postnatal, but not embryonic, cycling cardiomyocytes fail to progress through cytokinesis and subsequently binucleate, consistent with published reports of in vitro and in vivo observations. Direct coculture with postnatal cFbs increased cardiomyocyte binucleation, which could be inhibited by RGD peptide treatment. In contrast, cFb-conditioned medium or transwell coculture did not significantly increase cardiomyocyte binucleation, suggesting that cFbs inhibit cardiomyocyte cytokinesis through ECM modulation rather than by secreting diffusible factors. Furthermore, we found that both embryonic and postnatal CMs binucleate at a significantly higher rate when cultured on postnatal cFb-derived ECM compared with embryonic cFb-derived ECM. These cytokinetic defects correlate with cardiomyocyte inefficiency in mitotic rounding, a process which is key to successful cytokinesis. To identify ECM proteins that modulate cardiomyocyte cytokinesis, we compared the composition of embryonic and postnatal cFb-derived ECM by mass spectrometry followed by functional assessment. We found that 2 embryonically enriched ECM proteins, SLIT2 and NPNT (nephronectin), promote cytokinesis of postnatal CMs in vitro and in vivo. CONCLUSIONS We identified the postnatal cardiac ECM as a nonpermissive environment for cardiomyocyte cytokinesis and uncovered novel functions for the embryonic ECM proteins SLIT2 and NPNT (nephronectin) in promoting postnatal cardiomyocyte cytokinesis. Graphic Abstract: A graphic abstract is available for this article.
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Affiliation(s)
- Chi-Chung Wu
- From the Department of Developmental Genetics (C.-C.W., D.Y.R.S.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,German Centre for Cardiovascular Research (DZHK) Partner site Rhein Main (C.-C.W., S.J., J.G., D.Y.R.S.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Sylvia Jeratsch
- German Centre for Cardiovascular Research (DZHK) Partner site Rhein Main (C.-C.W., S.J., J.G., D.Y.R.S.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Biomolecular Mass Spectrometry (S.J., J.G.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Johannes Graumann
- German Centre for Cardiovascular Research (DZHK) Partner site Rhein Main (C.-C.W., S.J., J.G., D.Y.R.S.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,Biomolecular Mass Spectrometry (S.J., J.G.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Didier Y R Stainier
- From the Department of Developmental Genetics (C.-C.W., D.Y.R.S.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany.,German Centre for Cardiovascular Research (DZHK) Partner site Rhein Main (C.-C.W., S.J., J.G., D.Y.R.S.), Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
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13
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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: 35] [Impact Index Per Article: 8.8] [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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14
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Broughton KM, Sussman MA. Adult Cardiomyocyte Cell Cycle Detour: Off-ramp to Quiescent Destinations. Trends Endocrinol Metab 2019; 30:557-567. [PMID: 31262545 PMCID: PMC6703820 DOI: 10.1016/j.tem.2019.05.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/24/2019] [Accepted: 05/30/2019] [Indexed: 02/06/2023]
Abstract
Ability to promote completion of mitotic cycling of adult mammalian cardiomyocytes remains an intractable and vexing challenge, despite being one of the most sought after 'holy grails' of cardiovascular research. While some of the struggle is attributable to adult cardiomyocytes themselves that are notoriously post-mitotic, another contributory factor rests with difficulty in definitive tracking of adult cardiomyocyte cell cycle and lack of rigorous measures to track proliferation in situ. This review summarizes past, present, and future directions to promote adult mammalian cardiomyocyte cell cycle progression, proliferation, and renewal. Establishing relationship(s) between cardiomyocyte cell cycle progression and cellular biological properties is sorely needed to understand the mechanistic basis for cardiomyocyte cell cycle withdrawal to enhance cardiomyocyte cell cycle progression and mitosis.
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Affiliation(s)
- Kathleen M Broughton
- San Diego State University, Department of Biology and Integrated Regenerative Research Institute, San Diego, CA 92182, USA
| | - Mark A Sussman
- San Diego State University, Department of Biology and Integrated Regenerative Research Institute, San Diego, CA 92182, USA.
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15
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Cardiomyocyte cell cycle dynamics and proliferation revealed through cardiac-specific transgenesis of fluorescent ubiquitinated cell cycle indicator (FUCCI). J Mol Cell Cardiol 2018; 127:154-164. [PMID: 30571978 DOI: 10.1016/j.yjmcc.2018.12.007] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/21/2018] [Accepted: 12/17/2018] [Indexed: 01/11/2023]
Abstract
RATIONALE Understanding and manipulating the cardiomyocyte cell cycle has been the focus of decades of research, however the ultimate goal of activating mitotic activity in adult mammalian cardiomyocytes remains elusive and controversial. The relentless pursuit of controlling cardiomyocyte mitosis has been complicated and obfuscated by a multitude of indices used as evidence of cardiomyocyte cell cycle activity that lack clear identification of cardiomyocyte "proliferation" versus cell cycle progression, endoreplication, endomitosis, and even DNA damage. Unambiguous appreciation of the complexity of cardiomyocyte replication that avoids oversimplification and misinterpretation is desperately needed. OBJECTIVE Track cardiomyocyte cell cycle activity and authenticate fidelity of proliferation markers as indicators of de novo cardiomyogenesis in post-mitotic cardiomyocytes. METHODS AND RESULTS Cardiomyocytes expressing the FUCCI construct driven by the α-myosin heavy chain promoter were readily and uniformly detected through the myocardium of transgenic mice. Cardiomyocyte cell cycle activity peaks at postnatal day 2 and rapidly declines thereafter with almost all cardiomyocytes arrested at the G1/S cell cycle transition. Myocardial infarction injury in adult hearts prompts transient small increases in myocytes progressing through cell cycle without concurrent mitotic activity, indicating lack of cardiomyogenesis. In comparison, cardiomyogenic activity during early postnatal development correlated with coincidence of FUCCI and cKit+ cells that were undetectable in the adult myocardium. CONCLUSIONS Cardiomyocyte-specific expression of Fluorescence Ubiquitination-based Cell Cycle Indicators (FUCCI) reveals previously unappreciated aspects of cardiomyocyte cell cycle arrest and biological activity in postnatal development and in response to pathologic damage. Compared to many other methods and model systems, the FUCCI transgenic (FUCCI-Tg) mouse represents a valuable tool to unambiguously track cell cycle and proliferation of the entire cardiomyocyte population in the adult murine heart. FUCCI-Tg provides a desperately needed novel approach in the armamentarium of tools to validate cardiomyocyte proliferative activity that will reveal cell cycle progression, discriminate between cycle progression, DNA replication, and proliferation, and provide important insight for enhancing cardiomyocyte proliferation in the context of adult myocardial tissue.
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16
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Pham K, Kan A, Whitehead L, Hennessy RJ, Rogers K, Hodgkin PD. Converse Smith-Martin cell cycle kinetics by transformed B lymphocytes. Cell Cycle 2018; 17:2041-2051. [PMID: 30205749 PMCID: PMC6260211 DOI: 10.1080/15384101.2018.1511511] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Recent studies using direct live cell imaging have reported that individual B lymphocytes have correlated transit times between their G1 and S/G2/M phases. This finding is in contradiction with the influential model of Smith and Martin that assumed the bulk of the total cell cycle time variation arises in the G1 phase of the cell cycle with little contributed by the S/G2/M phase. Here we extend these studies to examine the relation between cell cycle phase lengths in two B lymphoma cell lines. We report that transformed B lymphoma cells undergo a short G1 period that displays little correlation with the time taken for the subsequent S/G2/M phase. Consequently, the bulk of the variation noted for total division times within a population is found in the S/G2/M phases and not the G1 phase. Models that reverse the expected source of variation and assume a single deterministic time in G1 followed by a lag + exponential distribution for S/G2/M fit the data well. These models can be improved further by adopting two sequential distributions or by using the stretched lognormal model developed for primary lymphocytes. We propose that shortening of G1 transit times and uncoupling from other cell cycle phases may be a hallmark of lymphocyte transformation that could serve as an observable phenotypic marker of cancer evolution.
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Affiliation(s)
- K Pham
- a Division of Immunology , The Walter and Eliza Hall Institute of Medical Research , Parkville , Australia.,b Department of Medical Biology , The University of Melbourne , Parkville , Australia
| | - A Kan
- a Division of Immunology , The Walter and Eliza Hall Institute of Medical Research , Parkville , Australia.,b Department of Medical Biology , The University of Melbourne , Parkville , Australia.,c Department of Computing and Information Systems , The University of Melbourne , Parkville , Australia
| | - L Whitehead
- a Division of Immunology , The Walter and Eliza Hall Institute of Medical Research , Parkville , Australia.,b Department of Medical Biology , The University of Melbourne , Parkville , Australia
| | - R J Hennessy
- a Division of Immunology , The Walter and Eliza Hall Institute of Medical Research , Parkville , Australia.,b Department of Medical Biology , The University of Melbourne , Parkville , Australia
| | - K Rogers
- a Division of Immunology , The Walter and Eliza Hall Institute of Medical Research , Parkville , Australia.,b Department of Medical Biology , The University of Melbourne , Parkville , Australia
| | - P D Hodgkin
- a Division of Immunology , The Walter and Eliza Hall Institute of Medical Research , Parkville , Australia.,b Department of Medical Biology , The University of Melbourne , Parkville , Australia
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17
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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: 30] [Impact Index Per Article: 5.0] [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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18
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Abstract
Efficient cardiac regeneration is closely associated with the ability of cardiac myocytes to proliferate. Fetal or neonatal mouse hearts containing proliferating cardiac myocytes regenerate even extensive injuries, whereas adult hearts containing mostly post-mitotic cardiac myocytes have lost this ability. The same correlation is seen in some homoiotherm species such as teleost fish and urodelian amphibians leading to the hypothesis that cardiac myocyte proliferation is a major driver of heart regeneration. Although cardiomyocyte proliferation might not be the only prerequisite to restore full organ function after cardiac damage, induction of cardiac myocyte proliferation is an attractive therapeutic option to cure the injured heart and prevent heart failure. To (re)initiate cardiac myocyte proliferation in adult mammalian hearts, a thorough understanding of the molecular circuitry governing cardiac myocyte cell cycle regulation is required. Here, we review the current knowledge in the field focusing on the withdrawal of cardiac myocytes from the cell cycle during the transition from neonatal to adult stages.
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Affiliation(s)
- Xuejun Yuan
- From the Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany (X.Y., T.B.); and Department of Internal Medicine II, Justus Liebig University Giessen, Member of the German Center for Cardiovascular Research (DZHK), Member of the German Center for Lung Research (DZL), Giessen, Germany (T.B.)
| | - Thomas Braun
- From the Max-Planck-Institute for Heart and Lung Research, Bad Nauheim, Germany (X.Y., T.B.); and Department of Internal Medicine II, Justus Liebig University Giessen, Member of the German Center for Cardiovascular Research (DZHK), Member of the German Center for Lung Research (DZL), Giessen, Germany (T.B.).
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19
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Hashimoto K, Kodama A, Honda T, Hanashima A, Ujihara Y, Murayama T, Nishimatsu SI, Mohri S. Fam64a is a novel cell cycle promoter of hypoxic fetal cardiomyocytes in mice. Sci Rep 2017; 7:4486. [PMID: 28667270 PMCID: PMC5493652 DOI: 10.1038/s41598-017-04823-1] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2016] [Accepted: 05/22/2017] [Indexed: 01/22/2023] Open
Abstract
Fetal cardiomyocytes actively proliferate to form the primitive heart in utero in mammals, but they stop dividing shortly after birth. The identification of essential molecules maintaining this active cardiomyocyte proliferation is indispensable for potential adult heart regeneration. A recent study has shown that this proliferation depends on a low fetal oxygen condition before the onset of breathing at birth. We have established an isolation protocol for mouse fetal cardiomyocytes, performed under strict low oxygen conditions to mimic the intrauterine environment, that gives the highest proliferative activities thus far reported. Oxygen exposure during isolation/culture markedly inhibited cell division and repressed cell cycle-promoting genes, and subsequent genome-wide analysis identified Fam64a as a novel regulatory molecule. Fam64a was abundantly expressed in hypoxic fetal cardiomyocyte nuclei, but this expression was drastically repressed by oxygen exposure, and in postnatal cardiomyocytes following the onset of breathing and the resulting elevation of oxygen tension. Fam64a knockdown inhibited and its overexpression enhanced cardiomyocyte proliferation. Expression of a non-degradable Fam64a mutant suggested that optimum Fam64a expression and subsequent degradation by anaphase-promoting complex/cyclosome (APC/C) during the metaphase-to-anaphase transition are required for fetal cardiomyocyte division. We propose that Fam64a is a novel cell cycle promoter of hypoxic fetal cardiomyocytes in mice.
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Affiliation(s)
- Ken Hashimoto
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan.
| | - Aya Kodama
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Takeshi Honda
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan.,Department of Cardiovascular Surgery, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Akira Hanashima
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Yoshihiro Ujihara
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Takashi Murayama
- Department of Cellular and Molecular Pharmacology, Juntendo University, Tokyo, 113-8421, Japan
| | - Shin-Ichiro Nishimatsu
- Department of Molecular and Developmental Biology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
| | - Satoshi Mohri
- First Department of Physiology, Kawasaki Medical School, Kurashiki, Okayama, 701-0192, Japan
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20
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Affiliation(s)
- Olaf Bergmann
- From the Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden (O.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (T.B.)
| | - Thomas Braun
- From the Department of Cell and Molecular Biology, Karolinska Institute, Stockholm, Sweden (O.B.); and Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany (T.B.).
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21
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Hirai M, Chen J, Evans SM. Tissue-Specific Cell Cycle Indicator Reveals Unexpected Findings for Cardiac Myocyte Proliferation. Circ Res 2015; 118:20-8. [PMID: 26472817 DOI: 10.1161/circresaha.115.307697] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 10/15/2015] [Indexed: 12/18/2022]
Abstract
RATIONALE Discerning cardiac myocyte cell cycle behavior is challenging owing to commingled cell types with higher proliferative activity. OBJECTIVE To investigate cardiac myocyte cell cycle activity in development and the early postnatal period. METHODS AND RESULTS To facilitate studies of cell type-specific proliferation, we have generated tissue-specific cell cycle indicator BAC transgenic mouse lines. Experiments using embryonic fibroblasts from CyclinA2-LacZ-floxed-EGFP, or CyclinA2-EGFP mice, demonstrated that CyclinA2-βgal and CyclinA2-EGFP were expressed from mid-G1 to mid-M phase. Using Troponin T-Cre;CyclinA2-LacZ-EGFP mice, we examined cardiac myocyte cell cycle activity during embryogenesis and in the early postnatal period. Our data demonstrated that right ventricular cardiac myocytes exhibited reduced cell cycle activity relative to left ventricular cardiac myocytes in the immediate perinatal period. Additionally, in contrast to a recent report, we could find no evidence to support a burst of cardiac myocyte cell cycle activity at postnatal day 15. CONCLUSIONS Our data highlight advantages of a cardiac myocyte-specific cell cycle reporter for studies of cardiac myocyte cell cycle regulation.
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Affiliation(s)
- Maretoshi Hirai
- From the Skaggs School of Pharmacy and Pharmaceutical Sciences (M.H., S.M.E.), Department of Medicine (J.C., S.M.E.), and Department of Pharmacology (S.M.E.), University of California, San Diego, La Jolla
| | - Ju Chen
- From the Skaggs School of Pharmacy and Pharmaceutical Sciences (M.H., S.M.E.), Department of Medicine (J.C., S.M.E.), and Department of Pharmacology (S.M.E.), University of California, San Diego, La Jolla
| | - Sylvia M Evans
- From the Skaggs School of Pharmacy and Pharmaceutical Sciences (M.H., S.M.E.), Department of Medicine (J.C., S.M.E.), and Department of Pharmacology (S.M.E.), University of California, San Diego, La Jolla.
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22
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Analysis of cardiomyocyte movement in the developing murine heart. Biochem Biophys Res Commun 2015; 464:1000-1007. [PMID: 26168730 DOI: 10.1016/j.bbrc.2015.07.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 07/07/2015] [Indexed: 12/29/2022]
Abstract
The precise assemblage of several types of cardiac precursors controls heart organogenesis. The cardiac precursors show dynamic movement during early development and then form the complicated heart structure. However, cardiomyocyte movements inside the newly organized mammalian heart remain unclear. We previously established the method of ex vivo time-lapse imaging of the murine heart to study cardiomyocyte behavior by using the Fucci (fluorescent ubiquitination-based cell cycle indicator) system, which can effectively label individual G1, S/G2/M, and G1/S-transition phase nuclei in living cardiomyocytes as red, green, and yellow, respectively. Global analysis of gene expression in Fucci green positive ventricular cardiomyocytes confirmed that cell cycle regulatory genes expressed in G1/S, S, G2/M, and M phase transitions were upregulated. Interestingly, pathway analysis revealed that many genes related to the cell cycle were significantly upregulated in the Fucci green positive ventricular cardiomyocytes, while only a small number of genes related to cell motility were upregulated. Time-lapse imaging showed that murine proliferating cardiomyocytes did not exhibit dynamic movement inside the heart, but stayed on site after entering the cell cycle.
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23
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Wang F, Reece EA, Yang P. Oxidative stress is responsible for maternal diabetes-impaired transforming growth factor beta signaling in the developing mouse heart. Am J Obstet Gynecol 2015; 212:650.e1-11. [PMID: 25595579 DOI: 10.1016/j.ajog.2015.01.014] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Revised: 12/20/2014] [Accepted: 01/08/2015] [Indexed: 02/06/2023]
Abstract
OBJECTIVE Oxidative stress plays a causal role in diabetic embryopathy. Maternal diabetes induces heart defects and impaired transforming growth factor beta (TGFβ) signaling, which is essential for cardiogenesis. We hypothesize that mitigating oxidative stress through superoxide dismutase 1 (SOD1) overexpression in transgenic (Tg) mice reverses maternal hyperglycemia-impaired TGFβ signaling and its downstream effectors. STUDY DESIGN Day 12.5 embryonic hearts from wild-type (WT) and SOD1 overexpressing embryos of nondiabetic (ND) and diabetic mellitus (DM) dams were used for the detection of oxidative stress markers: 4-hydroxynonenal (4-HNE) and malondlaldehyde (MDA), and TGFβ1, 2, and 3, phosphor (p)-TGFβ receptor II (TβRII), p-phosphorylated mothers against decapentaplegic (Smad)2, and p-Smad3. The expression of 3 TGFβ-responsive genes was also assessed. Day 11.5 embryonic hearts were explanted and cultured ex vivo, with or without treatments of a SOD1 mimetic (Tempol; Enzo Life Science, Farmingdale, NY) or a TGFβ recombinant protein for the detection of TGFβ signaling intermediates. RESULTS Levels of 4-HNE and MDA were significantly increased by maternal diabetes, and SOD1 overexpression blocked the increase of these 2 oxidative stress markers. Maternal diabetes suppresses the TGFβ signaling pathway by down-regulating TGFβ1 and TGFβ3 expression. Consequently, phosphorylation of TβRII, Smad2, and Smad3, downstream effectors of TGFβ, and expression of 3 TGFβ-responsive genes were reduced by maternal diabetes, and these reductions were prevented by SOD1 overexpression. Treatment with Tempol or TGFβ recombinant protein restored high-glucose-suppressed TGFβ signaling intermediates and responsive gene expression. CONCLUSION Oxidative stress mediates the inhibitory effect of hyperglycemia in the developing heart. Antioxidants, TGFβ recombinant proteins, or TGFβ agonists may have potential therapeutic values in the prevention of heart defects in diabetic pregnancies.
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Affiliation(s)
- Fang Wang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD
| | - E Albert Reece
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD
| | - Peixin Yang
- Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Maryland School of Medicine, Baltimore, MD; Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD.
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Zielke N, Edgar BA. FUCCI sensors: powerful new tools for analysis of cell proliferation. WILEY INTERDISCIPLINARY REVIEWS-DEVELOPMENTAL BIOLOGY 2015; 4:469-87. [PMID: 25827130 PMCID: PMC6681141 DOI: 10.1002/wdev.189] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 02/11/2015] [Accepted: 02/26/2015] [Indexed: 01/09/2023]
Abstract
Visualizing the cell cycle behavior of individual cells within living organisms can facilitate the understanding of developmental processes such as pattern formation, morphogenesis, cell differentiation, growth, cell migration, and cell death. Fluorescence Ubiquitin Cell Cycle Indicator (FUCCI) technology offers an accurate, versatile, and universally applicable means of achieving this end. In recent years, the FUCCI system has been adapted to several model systems including flies, fish, mice, and plants, making this technology available to a wide range of researchers for studies of diverse biological problems. Moreover, a broad range of FUCCI‐expressing cell lines originating from diverse cell types have been generated, hence enabling the design of advanced studies that combine in vivo experiments and cell‐based methods such as high‐content screening. Although only a short time has passed since its introduction, the FUCCI technology has already provided fundamental insight into how cells establish quiescence and how G1 phase length impacts the balance between pluripotency and stem cell differentiation. Further discoveries using the FUCCI technology are sure to come. WIREs Dev Biol 2015, 4:469–487. doi: 10.1002/wdev.189 This article is categorized under:
Adult Stem Cells, Tissue Renewal, and Regeneration > Methods and Principles Technologies > Generating Chimeras and Lineage Analysis Technologies > Analysis of Cell, Tissue, and Animal Phenotypes
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Affiliation(s)
- N Zielke
- Deutsches Krebsforschungszentrum (DKFZ), Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH) Allianz, Heidelberg, Germany
| | - B A Edgar
- Deutsches Krebsforschungszentrum (DKFZ), Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH) Allianz, Heidelberg, Germany
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Senyo SE, Lee RT, Kühn B. Cardiac regeneration based on mechanisms of cardiomyocyte proliferation and differentiation. Stem Cell Res 2014; 13:532-41. [PMID: 25306390 PMCID: PMC4435693 DOI: 10.1016/j.scr.2014.09.003] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 09/10/2014] [Accepted: 09/16/2014] [Indexed: 12/23/2022] Open
Abstract
Cardiomyocyte proliferation and progenitor differentiation are endogenous mechanisms of myocardial development. Cardiomyocytes continue to proliferate in mammals for part of post-natal development. In adult mammals under homeostatic conditions, cardiomyocytes proliferate at an extremely low rate. Because the mechanisms of cardiomyocyte generation provide potential targets for stimulating myocardial regeneration, a deep understanding is required for developing such strategies. We will discuss approaches for examining cardiomyocyte regeneration, review the specific advantages, challenges, and controversies, and recommend approaches for interpretation of results. We will also draw parallels between developmental and regenerative principles of these mechanisms and how they could be targeted for treating heart failure.
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Affiliation(s)
- Samuel E Senyo
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA; Brigham Regenerative Medicine Center, Cambridge, MA 02139, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Richard T Lee
- Department of Medicine, Cardiovascular Division, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA; Brigham Regenerative Medicine Center, Cambridge, MA 02139, USA; Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA
| | - Bernhard Kühn
- Harvard Stem Cell Institute, Cambridge, MA 02138, USA; Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA 02138, USA; Department of Cardiology, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics, Harvard Medical School, Boston, MA 02115, USA.
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Cardiac myocyte proliferation: not as simple as counting sheep. J Mol Cell Cardiol 2014; 74:125-6. [PMID: 24839912 DOI: 10.1016/j.yjmcc.2014.05.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 05/05/2014] [Accepted: 05/09/2014] [Indexed: 11/23/2022]
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