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Deogharia M, Venegas-Zamora L, Agrawal A, Shi M, Jain AK, McHugh KJ, Altamirano F, Marian AJ, Gurha P. Histone demethylase KDM5 regulates cardiomyocyte maturation by promoting fatty acid oxidation, oxidative phosphorylation, and myofibrillar organization. Cardiovasc Res 2024; 120:630-643. [PMID: 38230606 PMCID: PMC11074792 DOI: 10.1093/cvr/cvae014] [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: 05/29/2023] [Revised: 11/09/2023] [Accepted: 12/12/2023] [Indexed: 01/18/2024] Open
Abstract
AIMS Human pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) provide a platform to identify and characterize factors that regulate the maturation of CMs. The transition from an immature foetal to an adult CM state entails coordinated regulation of the expression of genes involved in myofibril formation and oxidative phosphorylation (OXPHOS) among others. Lysine demethylase 5 (KDM5) specifically demethylates H3K4me1/2/3 and has emerged as potential regulators of expression of genes involved in cardiac development and mitochondrial function. The purpose of this study is to determine the role of KDM5 in iPSC-CM maturation. METHODS AND RESULTS KDM5A, B, and C proteins were mainly expressed in the early post-natal stages, and their expressions were progressively downregulated in the post-natal CMs and were absent in adult hearts and CMs. In contrast, KDM5 proteins were persistently expressed in the iPSC-CMs up to 60 days after the induction of myogenic differentiation, consistent with the immaturity of these cells. Inhibition of KDM5 by KDM5-C70 -a pan-KDM5 inhibitor, induced differential expression of 2372 genes, including upregulation of genes involved in fatty acid oxidation (FAO), OXPHOS, and myogenesis in the iPSC-CMs. Likewise, genome-wide profiling of H3K4me3 binding sites by the cleavage under targets and release using nuclease assay showed enriched of the H3K4me3 peaks at the promoter regions of genes encoding FAO, OXPHOS, and sarcomere proteins. Consistent with the chromatin and gene expression data, KDM5 inhibition increased the expression of multiple sarcomere proteins and enhanced myofibrillar organization. Furthermore, inhibition of KDM5 increased H3K4me3 deposits at the promoter region of the ESRRA gene and increased its RNA and protein levels. Knockdown of ESRRA in KDM5-C70-treated iPSC-CM suppressed expression of a subset of the KDM5 targets. In conjunction with changes in gene expression, KDM5 inhibition increased oxygen consumption rate and contractility in iPSC-CMs. CONCLUSION KDM5 inhibition enhances maturation of iPSC-CMs by epigenetically upregulating the expressions of OXPHOS, FAO, and sarcomere genes and enhancing myofibril organization and mitochondrial function.
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Affiliation(s)
- Manisha Deogharia
- Center for Cardiovascular Genetics, Institute of Molecular Medicine, University of Texas Health Sciences Center at Houston, 6770 Bertner Street, C950G, Houston, TX 77030, USA
| | - Leslye Venegas-Zamora
- Department of Cardiovascular Sciences, Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, Texas 77030, USA
| | - Akanksha Agrawal
- Department of Cardiovascular Sciences, Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, Texas 77030, USA
| | - Miusi Shi
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77030, USA
| | - Abhinav K Jain
- Department of Epigenetics and Molecular Carcinogenesis, Center for Cancer Epigenetics, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Blvd, Houston, TX 77030, USA
| | - Kevin J McHugh
- Department of Bioengineering, Rice University, 6500 Main Street, Houston, TX 77030, USA
- Department of Chemistry, Rice University, Houston, 6500 Main Street, Houston, TX 77030, USA
| | - Francisco Altamirano
- Department of Cardiovascular Sciences, Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, Texas 77030, USA
- Department of Cardiothoracic Surgery, Weill Cornell Medical College, Cornell University, Ithaca, NY, USA
| | - Ali J Marian
- Center for Cardiovascular Genetics, Institute of Molecular Medicine, University of Texas Health Sciences Center at Houston, 6770 Bertner Street, C950G, Houston, TX 77030, USA
| | - Priyatansh Gurha
- Center for Cardiovascular Genetics, Institute of Molecular Medicine, University of Texas Health Sciences Center at Houston, 6770 Bertner Street, C950G, Houston, TX 77030, USA
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Deogharia M, Agrawal A, Shi M, Jain AK, McHugh KJ, Altamirano F, Marian AJ, Gurha P. Histone demethylase KDM5 regulates cardiomyocyte maturation by promoting fatty acid oxidation, oxidative phosphorylation, and myofibrillar organization. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.11.535169. [PMID: 37090524 PMCID: PMC10120725 DOI: 10.1101/2023.04.11.535169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/25/2023]
Abstract
Rationale Human pluripotent stem cell-derived CMs (iPSC-CMs) are a valuable tool for disease modeling, cell therapy and to reconstruct the CM maturation process and identify, characterize factors that regulate maturation. The transition from immature fetal to adult CM entails coordinated regulation of the mature gene programming, which is characterized by the induction of myofilament and OXPHOS gene expression among others. Recent studies in Drosophila , C. elegans, and C2C12 myoblast cell lines have implicated the histone H3K4me3 demethylase KDM5 and its homologs, as a potential regulator of developmental gene program and mitochondrial function. We speculated that KDM5 may potentiate the maturation of iPSC-CMs by targeting a conserved epigenetic program that encompass mitochondrial OXPHOS and other CM specific maturation genes. Objectives The purpose of this study is to determine the role of KDM5 in iPSC-CM maturation. Methods and Results Immunoblot analysis revealed that KDM5A, B, and C expression was progressively downregulated in postnatal cardiomyocytes and absent in adult hearts and CMs. Additionally, KDM5 proteins were found to be persistently expressed in iPSC-CMs up to 60 days after the onset of myogenic differentiation, consistent with the immaturity of these cells. Inhibition of KDM5 by KDM5-C70 -a pan-KDM5 inhibitor-resulted in differential regulation of 2,372 genes including upregulation of Fatty acid oxidation (FAO), OXPHOS, and myogenic gene programs in iPSC-CMs. Likewise, genome-wide profiling of H3K4me3 binding sites by the CUT&RUN assay revealed enriched H3K4me3 peaks at the promoter regions of FAO, OXPHOS, and sarcomere genes. Consistent with the chromatin and gene expression data, KDM5 inhibition led to increased expression of multiple sarcomere proteins, enhanced myofibrillar organization and improved calcium handling. Furthermore, inhibition of KDM5 increased H3K4me3 deposits at the promoter region of the ESRRA gene, which is known to regulate OXPHOS and cardiomyocyte maturation, and resulted in its increased RNA and protein levels. Finally, KDM5 inhibition increased baseline, peak, and spare oxygen consumption rates in iPSC-CMs. Conclusions KDM5 regulates the maturation of iPSC-CMs by epigenetically regulating the expression of ESRRA, OXPHOS, FAO, and sarcomere genes and enhancing myofibril organization and mitochondrial function.
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Buja LM, Mitchell RN. Basic pathobiology of cell-based therapies and cardiac regenerative medicine. Cardiovasc Pathol 2022. [DOI: 10.1016/b978-0-12-822224-9.00016-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Marwarha G, Røsand Ø, Scrimgeour N, Slagsvold KH, Høydal MA. miR-210 Regulates Apoptotic Cell Death during Cellular Hypoxia and Reoxygenation in a Diametrically Opposite Manner. Biomedicines 2021; 10:42. [PMID: 35052722 PMCID: PMC8772724 DOI: 10.3390/biomedicines10010042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/20/2021] [Accepted: 12/23/2021] [Indexed: 12/20/2022] Open
Abstract
Apoptotic cell death of cardiomyocytes is a characteristic hallmark of ischemia-reperfusion (I/R) injury. The master hypoxamiR, microRNA-210 (miR-210), is considered the primary driver of the cellular response to hypoxic stress. However, to date, no consensus has emerged with regards to the polarity of the miR-210-elicited cellular response, as miR-210 has been shown to exacerbate as well as attenuate hypoxia-driven apoptotic cell death. Herein, in AC-16 cardiomyocytes subjected to hypoxia-reoxygenation (H-R) stress, we unravel novel facets of miR-210 biology and resolve the biological response mediated by miR-210 into the hypoxia and reoxygenation temporal components. Using transient overexpression and decoy/inhibition vectors to modulate miR-210 expression, we elucidated a Janus role miR-210 in the cellular response to H-R stress, wherein miR-210 mitigated the hypoxia-induced apoptotic cell death but exacerbated apoptotic cell death during cellular reoxygenation. We further delineated the underlying cellular mechanisms that confer this diametrically opposite effect of miR-210 on apoptotic cell death. Our exhaustive biochemical assays cogently demonstrate that miR-210 attenuates the hypoxia-driven intrinsic apoptosis pathway, while significantly augmenting the reoxygenation-induced caspase-8-mediated extrinsic apoptosis pathway. Our study is the first to unveil this Janus role of miR-210 and to substantiate the cellular mechanisms that underlie this functional duality.
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Affiliation(s)
- Gurdeep Marwarha
- Group of Molecular and Cellular Cardiology, Department of Circulation and Medical Imaging, Faculty of Medicine and Health, Norwegian University of Technology and Science (NTNU), 7030 Trondheim, Norway; (G.M.); (Ø.R.); (N.S.); (K.H.S.)
| | - Øystein Røsand
- Group of Molecular and Cellular Cardiology, Department of Circulation and Medical Imaging, Faculty of Medicine and Health, Norwegian University of Technology and Science (NTNU), 7030 Trondheim, Norway; (G.M.); (Ø.R.); (N.S.); (K.H.S.)
| | - Nathan Scrimgeour
- Group of Molecular and Cellular Cardiology, Department of Circulation and Medical Imaging, Faculty of Medicine and Health, Norwegian University of Technology and Science (NTNU), 7030 Trondheim, Norway; (G.M.); (Ø.R.); (N.S.); (K.H.S.)
| | - Katrine Hordnes Slagsvold
- Group of Molecular and Cellular Cardiology, Department of Circulation and Medical Imaging, Faculty of Medicine and Health, Norwegian University of Technology and Science (NTNU), 7030 Trondheim, Norway; (G.M.); (Ø.R.); (N.S.); (K.H.S.)
- Department of Cardiothoracic Surgery, St. Olavs University Hospital, 7030 Trondheim, Norway
| | - Morten Andre Høydal
- Group of Molecular and Cellular Cardiology, Department of Circulation and Medical Imaging, Faculty of Medicine and Health, Norwegian University of Technology and Science (NTNU), 7030 Trondheim, Norway; (G.M.); (Ø.R.); (N.S.); (K.H.S.)
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Dudek J, Kutschka I, Maack C. Metabolic and Redox Regulation of Cardiovascular Stem Cell Biology and Pathology. Antioxid Redox Signal 2021; 35:163-181. [PMID: 33121253 DOI: 10.1089/ars.2020.8201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Significance: Cardiovascular stem cells are important for regeneration and repair of damaged tissue. Recent Advances: Pluripotent stem cells have a unique metabolism, which is adopted for their energetic and biosynthetic demand as rapidly proliferating cells. Stem cell differentiation requires an exceptional metabolic flexibility allowing for metabolic remodeling between glycolysis and oxidative phosphorylation. Critical Issues: Respiration is associated with the generation of reactive oxygen species (ROS) by the mitochondrial respiratory chain. But also the membrane-bound protein nicotinamide adenine dinucleotide phosphate oxidase (NADPH oxidase, NOX) contributes to ROS levels. ROS not only play a significant role in stem cell differentiation and tissue renewal but also cause senescence and contribute to tissue aging. Future Directions: For utilization of stem cells in therapeutic approaches, a deep understanding of the molecular mechanisms how metabolism and the cellular redox state regulate stem cell differentiation is required. Modulating the redox state of stem cells using antioxidative agents may be suitable to enhance activity of endothelial progenitor cells. Antioxid. Redox Signal. 35, 163-181.
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Affiliation(s)
- Jan Dudek
- Department of Translational Research, Comprehensive Heart Failure Center (CHFC), University Clinic Würzburg, Würzburg, Germany
| | - Ilona Kutschka
- Department of Translational Research, Comprehensive Heart Failure Center (CHFC), University Clinic Würzburg, Würzburg, Germany
| | - Christoph Maack
- Department of Translational Research, Comprehensive Heart Failure Center (CHFC), University Clinic Würzburg, Würzburg, Germany.,Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
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Zhen L, Zhao Q, Lü J, Deng S, Xu Z, Zhang L, Zhang Y, Fan H, Chen X, Liu Z, Gu Y, Yu Z. miR-301a-PTEN-AKT Signaling Induces Cardiomyocyte Proliferation and Promotes Cardiac Repair Post-MI. MOLECULAR THERAPY-NUCLEIC ACIDS 2020; 22:251-262. [PMID: 33230431 PMCID: PMC7515978 DOI: 10.1016/j.omtn.2020.08.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Accepted: 08/25/2020] [Indexed: 12/31/2022]
Abstract
Adult hearts are hard to recover after cardiac injury due to the limited proliferative ability of cardiomyocytes. Emerging evidence indicates the induction of cell cycle reentry of cardiomyocytes by special treatment or stimulation, which offers adult heart regenerative potential. Herein, a microRNA (miRNA) screening in cardiomyocytes identified miR-301a enriched specially in the neonatal cardiomyocytes from rats and mice. Overexpression of miR-301a in primary neonatal cardiomyocytes and H9C2 cells induced G1/S transition of the cell cycle, promoted cellular proliferation, and protected cardiomyocytes against hypoxia-induced apoptosis. Adeno-associated virus (AAV)9-mediated cardiac delivery of miR-301a to the mice model with myocardial infarction (MI) dramatically promoted cardiac repair post-MI in vivo. Phosphatase and tensin homolog (PTEN)/phosphatidylinositol 3-kinase (PI3K)/AKT signaling pathway was confirmed to mediate miR-301a-induced cell proliferation in cardiomyocytes. Loss of function of PTEN mimicked the miR-301a-induced phenotype, while gain of function of PTEN attenuated the miR-301a-induced cell proliferation in cardiomyocytes. Application of RG7440, a small molecule inhibitor of AKT, blocked the function of miR-301a in cardiomyocytes. The current study revealed a miRNA signaling in inducing the cell cycle reentry of cardiomyocytes in the injured heart, and it demonstrated the miR-301a/PTEN/AKT signaling as a potential therapeutic target to reconstitute lost cardiomyocytes in mammals.
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Affiliation(s)
- Lixiao Zhen
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Qian Zhao
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Jinhui Lü
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Shengqiong Deng
- Shanghai Gongli Hospital, The Second Military Medical University, Shanghai, China
| | - Zhen Xu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Lin Zhang
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Yuzhen Zhang
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Huimin Fan
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Xiongwen Chen
- Cardiovascular Research Center, Temple University School of Medicine, Philadelphia, PA 19122, USA
| | - Zhongmin Liu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Yuying Gu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
| | - Zuoren Yu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, 150 Jimo Road, Shanghai 200120, China
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Horikoshi Y, Yan Y, Terashvili M, Wells C, Horikoshi H, Fujita S, Bosnjak ZJ, Bai X. Fatty Acid-Treated Induced Pluripotent Stem Cell-Derived Human Cardiomyocytes Exhibit Adult Cardiomyocyte-Like Energy Metabolism Phenotypes. Cells 2019; 8:cells8091095. [PMID: 31533262 PMCID: PMC6769886 DOI: 10.3390/cells8091095] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 09/12/2019] [Accepted: 09/14/2019] [Indexed: 12/17/2022] Open
Abstract
Human induced pluripotent stem cell (iPSC)-derived cardiomyocytes (CMs) (iPSC-CMs) are a promising cell source for myocardial regeneration, disease modeling and drug assessment. However, iPSC-CMs exhibit immature fetal CM-like characteristics that are different from adult CMs in several aspects, including cellular structure and metabolism. As an example, glycolysis is a major energy source for immature CMs. As CMs mature, the mitochondrial oxidative capacity increases, with fatty acid β-oxidation becoming a key energy source to meet the heart’s high energy demand. The immaturity of iPSC-CMs thereby limits their applications. The aim of this study was to investigate whether the energy substrate fatty acid-treated iPSC-CMs exhibit adult CM-like metabolic properties. After 20 days of differentiation from human iPSCs, iPSC-CMs were sequentially cultured with CM purification medium (lactate+/glucose-) for 7 days and maturation medium (fatty acids+/glucose-) for 3–7 days by mimicking the adult CM’s preference of utilizing fatty acids as a major metabolic substrate. The purity and maturity of iPSC-CMs were characterized via the analysis of: (1) Expression of CM-specific markers (e.g., troponin T, and sodium and potassium channels) using RT-qPCR, Western blot or immunofluorescence staining and electron microscopy imaging; and (2) cell energy metabolic profiles using the XF96 Extracellular Flux Analyzer. iPSCs-CMs (98% purity) cultured in maturation medium exhibited enhanced elongation, increased mitochondrial numbers with more aligned Z-lines, and increased expression of matured CM-related genes, suggesting that fatty acid-contained medium promotes iPSC-CMs to undergo maturation. In addition, the oxygen consumption rate (OCR) linked to basal respiration, ATP production, and maximal respiration and spare respiratory capacity (representing mitochondrial function) was increased in matured iPSC-CMs. Mature iPSC-CMs also displayed a larger change in basal and maximum respirations due to the utilization of exogenous fatty acids (palmitate) compared with non-matured control iPSC-CMs. Etomoxir (a carnitine palmitoyltransferase 1 inhibitor) but not 2-deoxyglucose (an inhibitor of glycolysis) abolished the palmitate pretreatment-mediated OCR increases in mature iPSC-CMs. Collectively, our data demonstrate for the first time that fatty acid treatment promotes metabolic maturation of iPSC-CMs (as evidenced by enhanced mitochondrial oxidative function and strong capacity of utilizing fatty acids as energy source). These matured iPSC-CMs might be a promising human CM source for broad biomedical application.
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Affiliation(s)
- Yuichi Horikoshi
- Department of Emergency Medicine, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510, Japan.
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Yasheng Yan
- Department of Cell Biology, Neuroscience & Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Maia Terashvili
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Clive Wells
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Hisako Horikoshi
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
- Department of Plastic and Reconstructive Surgery, Juntendo University School of Medicine, Tokyo 113-8421, Japan.
| | - Satoshi Fujita
- Department of Emergency Medicine, Asahikawa Medical University, Asahikawa, Hokkaido 078-8510, Japan.
| | - Zeljko J Bosnjak
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
| | - Xiaowen Bai
- Department of Cell Biology, Neuroscience & Anatomy, Medical College of Wisconsin, Milwaukee, WI 53226, USA.
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Jones RE, Foster DS, Hu MS, Longaker MT. Wound healing and fibrosis: current stem cell therapies. Transfusion 2019; 59:884-892. [PMID: 30737822 DOI: 10.1111/trf.14836] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Accepted: 02/01/2018] [Indexed: 12/20/2022]
Abstract
Scarring is a result of the wound healing response and causes tissue dysfunction after injury. This process is readily evident in the skin, but also occurs internally across organ systems in the form of fibrosis. Stem cells are crucial to the innate tissue healing response and, as such, present a possible modality to therapeutically promote regenerative healing while minimizing scaring. In this review, the cellular basis of scaring and fibrosis is examined. Current stem cell therapies under exploration for skin wound healing and internal organ fibrosis are discussed. While most therapeutic approaches rely on the direct application of progenitor-type cells to injured tissue to promote healing, novel strategies to manipulate the scarring response are also presented. As our understanding of developmental and stem cell biology continues to increase, therapies to encourage regeneration of healthy functional tissue after damage secondary to injury or disease will continue to expand.
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Affiliation(s)
- Ruth Ellen Jones
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, California
| | - Deshka S Foster
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, California
| | - Michael S Hu
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, California
| | - Michael T Longaker
- Hagey Laboratory for Pediatric Regenerative Medicine, Department of Surgery, Division of Plastic and Reconstructive Surgery, Stanford University School of Medicine, Stanford, California
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Buja LM. Cardiac repair and the putative role of stem cells. J Mol Cell Cardiol 2019; 128:96-104. [DOI: 10.1016/j.yjmcc.2019.01.022] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Revised: 12/30/2018] [Accepted: 01/24/2019] [Indexed: 01/05/2023]
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Wang J, Chen X, Shen D, Ge D, Chen J, Pei J, Li Y, Yue Z, Feng J, Chu M, Nie Y. A long noncoding RNA NR_045363 controls cardiomyocyte proliferation and cardiac repair. J Mol Cell Cardiol 2018; 127:105-114. [PMID: 30553885 DOI: 10.1016/j.yjmcc.2018.12.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Revised: 11/26/2018] [Accepted: 12/09/2018] [Indexed: 12/19/2022]
Abstract
Long noncoding RNAs (lncRNAs) play important roles in the regulation of genes involved in cell proliferation. We have previously sought to more globally understand the differences of lncRNA expression between human fetal heart and adult heart to identify some functional lncRNAs which involve in the process of heart repair. We found that a highly conserved long noncoding RNA NR_045363 was mainly expressed in cardiomyocytes and rarely in non-cardiomyocytes. NR_045363 overexpression in 7-day-old mice heart could improve cardiac function and stimulate cardiomyocyte proliferation after myocardial infarction. Furthermore, NR_045363 knockdown inhibited proliferation of primary embryonic cardiomyocytes, while NR_045363 overexpression enhanced DNA synthesis and cytokinesis in neonatal cardiomyocytes in vitro. Mechanistic analysis revealed that NR_045363 promoted cardiomyocyte proliferation through interaction with miR-216a, which regulated the JAK2-STAT3 pathway. Our results showed that NR_045363 is a potent lncRNA modulator essential for cardiomyocyte proliferation.
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Affiliation(s)
- Jue Wang
- Department of Cardiac Surgery, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Xianda Chen
- Children's Heart Center, The Second Affiliated Hospital and Yuying Children's Hospital, Institute of Cardiovascular Development and Translational Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China; State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Danping Shen
- Children's Heart Center, The Second Affiliated Hospital and Yuying Children's Hospital, Institute of Cardiovascular Development and Translational Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Donghui Ge
- Children's Heart Center, The Second Affiliated Hospital and Yuying Children's Hospital, Institute of Cardiovascular Development and Translational Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China
| | - Jiuling Chen
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Jianqiu Pei
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Yandong Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Zhang Yue
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China; State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Jie Feng
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China
| | - Maoping Chu
- Children's Heart Center, The Second Affiliated Hospital and Yuying Children's Hospital, Institute of Cardiovascular Development and Translational Medicine, Wenzhou Medical University, Wenzhou, Zhejiang, China.
| | - Yu Nie
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing, China.
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Lock MC, Tellam RL, Botting KJ, Wang KCW, Selvanayagam JB, Brooks DA, Seed M, Morrison JL. The role of miRNA regulation in fetal cardiomyocytes, cardiac maturation and the risk of heart disease in adults. J Physiol 2018; 596:5625-5640. [PMID: 29785790 PMCID: PMC6265572 DOI: 10.1113/jp276072] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/15/2018] [Indexed: 12/14/2022] Open
Abstract
Myocardial infarction is a primary contributor towards the global burden of cardiovascular disease. Rather than repairing the existing damage of myocardial infarction, current treatments only address the symptoms of the disease and reducing the risk of a secondary infarction. Cardiac regenerative capacity is dependent on cardiomyocyte proliferation, which concludes soon after birth in humans and precocial species such as sheep. Human fetal cardiac tissue has some ability to repair following tissue damage, whereas a fully matured human heart has minimal capacity for cellular regeneration. This is in contrast to neonatal mice and adult zebrafish hearts, which retain the ability to undergo cardiomyocyte proliferation and can regenerate cardiac tissue after birth. In mice and zebrafish models, microRNAs (miRNAs) have been implicated in the regulation of genes involved in cardiac cell cycle progression and regeneration. However, the significance of miRNA regulation in cardiomyocyte proliferation for humans and other large mammals, where the timing of heart development in relation to birth is similar, remains unclear. miRNAs may be valuable targets for therapies that promote cardiac repair after injury. Therefore, elucidating the role of specific miRNAs in large animals, where heart development closely resembles that of humans, remains vitally important for identifying therapeutic targets that may be translated into clinical practice focused on tissue repair.
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Affiliation(s)
- Mitchell C. Lock
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical SciencesUniversity of South AustraliaAdelaideSA 5001Australia
| | - Ross L. Tellam
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical SciencesUniversity of South AustraliaAdelaideSA 5001Australia
| | - Kimberley J. Botting
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical SciencesUniversity of South AustraliaAdelaideSA 5001Australia
| | - Kimberley C. W. Wang
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical SciencesUniversity of South AustraliaAdelaideSA 5001Australia
- School of Human SciencesUniversity of Western AustraliaCrawleyWA 6009Australia
| | - Joseph B. Selvanayagam
- Cardiac Imaging Research Group, Department of Heart HealthSouth Australian Health & Medical Research Institute, and Flinders UniversityGPO Box 2100AdelaideSA 5001Australia
| | - Doug A. Brooks
- Mechanisms in Cell Biology and Disease Research Group, School of Pharmacy & Medical SciencesUniversity of South AustraliaAdelaideSA 5001Australia
| | - Mike Seed
- Hospital for Sick Children, Division of Cardiology555 University AvenueTorontoON M5G 1X8Canada
| | - Janna L. Morrison
- Early Origins of Adult Health Research Group, School of Pharmacy & Medical SciencesUniversity of South AustraliaAdelaideSA 5001Australia
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12
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Cui H, Miao S, Esworthy T, Zhou X, Lee SJ, Liu C, Yu ZX, Fisher JP, Mohiuddin M, Zhang LG. 3D bioprinting for cardiovascular regeneration and pharmacology. Adv Drug Deliv Rev 2018; 132:252-269. [PMID: 30053441 PMCID: PMC6226324 DOI: 10.1016/j.addr.2018.07.014] [Citation(s) in RCA: 84] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 06/22/2018] [Accepted: 07/20/2018] [Indexed: 12/18/2022]
Abstract
Cardiovascular disease (CVD) is a major cause of morbidity and mortality worldwide. Compared to traditional therapeutic strategies, three-dimensional (3D) bioprinting is one of the most advanced techniques for creating complicated cardiovascular implants with biomimetic features, which are capable of recapitulating both the native physiochemical and biomechanical characteristics of the cardiovascular system. The present review provides an overview of the cardiovascular system, as well as describes the principles of, and recent advances in, 3D bioprinting cardiovascular tissues and models. Moreover, this review will focus on the applications of 3D bioprinting technology in cardiovascular repair/regeneration and pharmacological modeling, further discussing current challenges and perspectives.
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Affiliation(s)
- Haitao Cui
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
| | - Shida Miao
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
| | - Timothy Esworthy
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
| | - Xuan Zhou
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
| | - Se-Jun Lee
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA
| | - Chengyu Liu
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Zu-Xi Yu
- National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - John P Fisher
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA; Center for Engineering Complex Tissues, University of Maryland, College Park, MD 20742, USA
| | | | - Lijie Grace Zhang
- Department of Mechanical and Aerospace Engineering, The George Washington University, Washington, DC 20052, USA; Department of Electrical and Computer Engineering, The George Washington University, Washington, DC 20052, USA; Department of Biomedical Engineering, The George Washington University, Washington, DC 20052, USA; Department of Medicine, The George Washington University, Washington, DC 20052, USA.
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13
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Russell‐Hallinan A, Watson CJ, Baugh JA. Epigenetics of Aberrant Cardiac Wound Healing. Compr Physiol 2018; 8:451-491. [DOI: 10.1002/cphy.c170029] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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14
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Mohamed TMA, Ang YS, Radzinsky E, Zhou P, Huang Y, Elfenbein A, Foley A, Magnitsky S, Srivastava D. Regulation of Cell Cycle to Stimulate Adult Cardiomyocyte Proliferation and Cardiac Regeneration. Cell 2018; 173:104-116.e12. [PMID: 29502971 PMCID: PMC5973786 DOI: 10.1016/j.cell.2018.02.014] [Citation(s) in RCA: 362] [Impact Index Per Article: 60.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 01/02/2018] [Accepted: 02/06/2018] [Indexed: 01/01/2023]
Abstract
Human diseases are often caused by loss of somatic cells that are incapable of re-entering the cell cycle for regenerative repair. Here, we report a combination of cell-cycle regulators that induce stable cytokinesis in adult post-mitotic cells. We screened cell-cycle regulators expressed in proliferating fetal cardiomyocytes and found that overexpression of cyclin-dependent kinase 1 (CDK1), CDK4, cyclin B1, and cyclin D1 efficiently induced cell division in post-mitotic mouse, rat, and human cardiomyocytes. Overexpression of the cell-cycle regulators was self-limiting through proteasome-mediated degradation of the protein products. In vivo lineage tracing revealed that 15%-20% of adult cardiomyocytes expressing the four factors underwent stable cell division, with significant improvement in cardiac function after acute or subacute myocardial infarction. Chemical inhibition of Tgf-β and Wee1 made CDK1 and cyclin B dispensable. These findings reveal a discrete combination of genes that can efficiently unlock the proliferative potential in cells that have terminally exited the cell cycle.
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Affiliation(s)
- Tamer M A Mohamed
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA; Institute of Cardiovascular Sciences, University of Manchester, Manchester M13 9PT, UK; Faculty of Pharmacy, Zagazig University, Al Sharqia Governorate, Egypt; Tenaya Therapeutics, South San Francisco, CA 94080, USA
| | - Yen-Sin Ang
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA
| | - Ethan Radzinsky
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA
| | - Ping Zhou
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA
| | - Yu Huang
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA
| | - Arye Elfenbein
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA
| | - Amy Foley
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA
| | - Sergey Magnitsky
- Department of Radiology, University of California San Francisco, San Francisco, CA 94158, USA
| | - Deepak Srivastava
- Gladstone Institute of Cardiovascular Disease and Roddenberry Stem Cell Center, San Francisco, CA 94158, USA; Department of Pediatrics, University of California San Francisco, San Francisco, CA 94158, USA; Department of Biochemistry & Biophysics, University of California San Francisco, San Francisco, CA 94158, USA.
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15
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Hematti P. Role of Extracellular Matrix in Cardiac Cellular Therapies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1098:173-188. [PMID: 30238371 DOI: 10.1007/978-3-319-97421-7_9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The extracellular matrix (ECM) is an essential regulator of homeostasis at the cellular, tissue, and organ level. It is now very well known that ECM dynamic remodeling is indispensable not only for normal growth and development but also recovery from tissue injuries. Indeed, abnormal remodeling of the ECM plays a major role in many pathophysiological processes and contributes to many different pathologies including cardiovascular disorders. Recently, cellular therapies have emerged as a potential therapeutic strategy for restoration of lost cardiomyocytes or their rejuvenation after cardiac damage and injuries. Harnessing the biological properties of ECM could be a viable strategy to enhance the therapeutic effects of cellular therapies by improving the engraftment, integration, survival, and functional adaptation of newly transplanted cells in many different platforms. Conversely, transplanted cells could restore the functionality and original composition of damaged ECM by secreting and depositing new ECM or stimulating normal ECM production by cardiac tissue native cells. Although the ultimate role of cell therapy in treatment of cardiac disorders is still a matter of great debate, the potential utility of ECM in improving the therapeutic effect of transplanted cells and vice versa the potential role of cell therapy as a means to restore the structure and functionality of damaged ECM should be carefully considered in implementation of future clinical cardiovascular cell therapy trials.
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Affiliation(s)
- Peiman Hematti
- Department of Medicine, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI, USA.
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16
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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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17
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Abstract
The tumor suppressor Trp53 (p53) inhibits cell growth after acute stress by regulating gene transcription. The mammalian genome contains hundreds of p53-binding sites. However, whether p53 participates in the regulation of cardiac tissue homeostasis under normal conditions is not known. To examine the physiologic role of p53 in adult cardiomyocytes in vivo, Cre-loxP-mediated conditional gene targeting in adult mice was used. Genome-wide transcriptome analyses of conditional heart-specific p53 knockout mice were performed. Genome-wide annotation and pathway analyses of >5,000 differentially expressed transcripts identified many p53-regulated gene clusters. Correlative analyses identified >20 gene sets containing more than 1,000 genes relevant to cardiac architecture and function. These transcriptomic changes orchestrate cardiac architecture, excitation-contraction coupling, mitochondrial biogenesis, and oxidative phosphorylation capacity. Interestingly, the gene expression signature in p53-deficient hearts confers resistance to acute biomechanical stress. The data presented here demonstrate a role for p53, a previously unrecognized master regulator of the cardiac transcriptome. The complex contributions of p53 define a biological paradigm for the p53 regulator network in the heart under physiological conditions.
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18
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Dadson K, Hauck L, Hao Z, Grothe D, Rao V, Mak TW, Billia F. The E3 ligase Mule protects the heart against oxidative stress and mitochondrial dysfunction through Myc-dependent inactivation of Pgc-1α and Pink1. Sci Rep 2017; 7:41490. [PMID: 28148912 PMCID: PMC5288653 DOI: 10.1038/srep41490] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 12/21/2016] [Indexed: 01/03/2023] Open
Abstract
Cardiac homeostasis requires proper control of protein turnover. Protein degradation is principally controlled by the Ubiquitin-Proteasome System. Mule is an E3 ubiquitin ligase that regulates cellular growth, DNA repair and apoptosis to maintain normal tissue architecture. However, Mule’s function in the heart has yet to be described. In a screen, we found reduced Mule expression in left ventricular samples from end-stage heart failure patients. Consequently, we generated conditional cardiac-specific Mule knockout (Mule fl/fl(y);mcm) mice. Mule ablation in adult Mule fl/fl(y);mcm mice prevented myocardial c-Myc polyubiquitination, leading to c-Myc accumulation and subsequent reduced expression of Pgc-1α, Pink1, and mitochondrial complex proteins. Furthermore, these mice developed spontaneous cardiac hypertrophy, left ventricular dysfunction, and early mortality. Co-deletion of Mule and c-Myc rescued this phenotype. Our data supports an indispensable role for Mule in cardiac homeostasis through the regulation of mitochondrial function via maintenance of Pgc-1α and Pink1 expression and persistent negative regulation of c-Myc.
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Affiliation(s)
- Keith Dadson
- Toronto General Research Institute, Toronto, 100 College St., M5G 1L7, Ontario Canada
| | - Ludger Hauck
- Toronto General Research Institute, Toronto, 100 College St., M5G 1L7, Ontario Canada
| | - Zhenyue Hao
- Campbell Family Cancer Research Institute, Princess Margaret Hospital, Toronto, Ontario, Canada
| | - Daniela Grothe
- Toronto General Research Institute, Toronto, 100 College St., M5G 1L7, Ontario Canada
| | - Vivek Rao
- Division of Cardiovascular Surgery, UHN, Toronto, ON, M5G 2C4, Canada
| | - Tak W Mak
- Campbell Family Cancer Research Institute, Princess Margaret Hospital, Toronto, Ontario, Canada
| | - Filio Billia
- Toronto General Research Institute, Toronto, 100 College St., M5G 1L7, Ontario Canada.,Division of Cardiology, University Health Network (UHN), Toronto, Ontario, Canada.,Heart and Stroke Richard Lewar Centre of Excellence, University of Toronto, Toronto, Ontario, Canada.,Institute of Medical Science, University of Toronto, 1 King's College Circle, Toronto, M5G 1A8, Ontario Canada
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19
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Xiao C, Gao L, Hou Y, Xu C, Chang N, Wang F, Hu K, He A, Luo Y, Wang J, Peng J, Tang F, Zhu X, Xiong JW. Chromatin-remodelling factor Brg1 regulates myocardial proliferation and regeneration in zebrafish. Nat Commun 2016; 7:13787. [PMID: 27929112 PMCID: PMC5476829 DOI: 10.1038/ncomms13787] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 11/01/2016] [Indexed: 12/15/2022] Open
Abstract
The zebrafish possesses a remarkable capacity of adult heart regeneration, but the underlying mechanisms are not well understood. Here we report that chromatin remodelling factor Brg1 is essential for adult heart regeneration. Brg1 mRNA and protein are induced during heart regeneration. Transgenic over-expression of dominant-negative Xenopus Brg1 inhibits the formation of BrdU+/Mef2C+ and Tg(gata4:EGFP) cardiomyocytes, leading to severe cardiac fibrosis and compromised myocardial regeneration. RNA-seq and RNAscope analyses reveal that inhibition of Brg1 increases the expression of cyclin-dependent kinase inhibitors such as cdkn1a and cdkn1c in the myocardium after ventricular resection; and accordingly, myocardial-specific expression of dn-xBrg1 blunts myocardial proliferation and regeneration. Mechanistically, injury-induced Brg1, via its interaction with Dnmt3ab, suppresses the expression of cdkn1c by increasing the methylation level of CpG sites at the cdkn1c promoter. Taken together, our results suggest that Brg1 promotes heart regeneration by repressing cyclin-dependent kinase inhibitors partly through Dnmt3ab-dependent DNA methylation.
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Affiliation(s)
- Chenglu Xiao
- Institute of Molecular Medicine, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China.,State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100871, China
| | - Lu Gao
- Institute of Molecular Medicine, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China.,State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100871, China
| | - Yu Hou
- Biodynamic Optical Imaging Center, Peking University, Beijing 100871, China.,College of Life Sciences, Peking University, Beijing 100871, China
| | - Congfei Xu
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, China.,Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Nannan Chang
- Institute of Molecular Medicine, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China.,State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100871, China
| | - Fang Wang
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Keping Hu
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences, Beijing 100193, China.,Peking Union Medical College, Beijing 100730, China
| | - Aibin He
- Institute of Molecular Medicine, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China
| | - Ying Luo
- Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Jun Wang
- School of Life Sciences, University of Science and Technology of China, Hefei 230026, China.,Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
| | - Jinrong Peng
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China
| | - Fuchou Tang
- Biodynamic Optical Imaging Center, Peking University, Beijing 100871, China.,College of Life Sciences, Peking University, Beijing 100871, China
| | - Xiaojun Zhu
- Institute of Molecular Medicine, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China.,State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100871, China
| | - Jing-Wei Xiong
- Institute of Molecular Medicine, Peking University, Beijing 100871, China.,Beijing Key Laboratory of Cardiometabolic Molecular Medicine, Peking University, Beijing 100871, China.,State Key Laboratory of Natural and Biomimetic Drugs, Beijing 100871, China
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20
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Cardiomyocyte proliferation in zebrafish and mammals: lessons for human disease. Cell Mol Life Sci 2016; 74:1367-1378. [PMID: 27812722 PMCID: PMC5357290 DOI: 10.1007/s00018-016-2404-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Revised: 10/14/2016] [Accepted: 10/28/2016] [Indexed: 01/08/2023]
Abstract
Cardiomyocytes proliferate profusely during early development and for a brief period after birth in mammals. Within a month after birth, this proliferative capability is dramatically reduced in mammals unlike lower vertebrates where it persists into adult life. The zebrafish, for example, retains the ability to regenerate the apex of the heart following resection by a mechanism predominantly driven by cardiomyocyte proliferation. Differences in proliferative capacity of cardiomyocytes in adulthood between mammals and lower vertebrates are closely liked to ontogenetic or phylogenetic factors. Elucidation of these factors has the potential to provide enormous benefits if they lead to the development of therapeutic strategies that facilitate cardiomyocyte proliferation. In this review, we highlight the differences between Mammalian and Zebrafish cardiomyocytes, which could explain at least in part the different proliferative capacities in these two species. We discuss the advantages of the zebrafish as a model of cardiomyocyte proliferation, particularly at the embryonic stage. We also identify a number of key molecular pathways with potential to reveal key steps in switching cardiomyocytes from a quiescent to a proliferative phenotype.
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21
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Awada HK, Hwang MP, Wang Y. Towards comprehensive cardiac repair and regeneration after myocardial infarction: Aspects to consider and proteins to deliver. Biomaterials 2016; 82:94-112. [PMID: 26757257 PMCID: PMC4872516 DOI: 10.1016/j.biomaterials.2015.12.025] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 12/15/2015] [Accepted: 12/19/2015] [Indexed: 12/13/2022]
Abstract
Ischemic heart disease is a leading cause of death worldwide. After the onset of myocardial infarction, many pathological changes take place and progress the disease towards heart failure. Pathologies such as ischemia, inflammation, cardiomyocyte death, ventricular remodeling and dilation, and interstitial fibrosis, develop and involve the signaling of many proteins. Proteins can play important roles in limiting or countering pathological changes after infarction. However, they typically have short half-lives in vivo in their free form and can benefit from the advantages offered by controlled release systems to overcome their challenges. The controlled delivery of an optimal combination of proteins per their physiologic spatiotemporal cues to the infarcted myocardium holds great potential to repair and regenerate the heart. The effectiveness of therapeutic interventions depends on the elucidation of the molecular mechanisms of the cargo proteins and the spatiotemporal control of their release. It is likely that multiple proteins will provide a more comprehensive and functional recovery of the heart in a controlled release strategy.
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Affiliation(s)
- Hassan K Awada
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Mintai P Hwang
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Yadong Wang
- Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Chemical and Petroleum Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Surgery, University of Pittsburgh, Pittsburgh, PA 15261, USA; Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, PA 15261, USA; McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA 15219, USA; Vascular Medicine Institute, University of Pittsburgh, Pittsburgh, PA 15261, USA; Clinical and Translational Science Institute, University of Pittsburgh, Pittsburgh, PA 15260, USA.
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22
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Stem cells and exosomes in cardiac repair. Curr Opin Pharmacol 2016; 27:19-23. [PMID: 26848944 DOI: 10.1016/j.coph.2016.01.003] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 01/15/2016] [Accepted: 01/18/2016] [Indexed: 01/24/2023]
Abstract
Cardiac diseases currently lead in the number of deaths per year, giving rise an interest in transplanting embryonic and adult stem cells as a means to improve damaged tissue from conditions such as myocardial infarction and coronary artery disease. After testing these cells as a treatment option in both animal and human models, it is believed that these cells improve the damaged tissue primarily through the release of autocrine and paracrine factors. Major concerns such as teratoma formation, immune response, difficulty harvesting cells, and limited cell proliferation and differentiation, hinder the routine use of these cells as a treatment option in the clinic. The advent of stem cell-derived exosomes circumvent those concerns, while still providing the growth factors, miRNA, and additional cell protective factors that aid in repairing and regenerating the damaged tissue. These exosomes have been found to be anti-apoptotic, anti-fibrotic, pro-angiogenic, as well as enhance cardiac differentiation, all of which are key to repairing damaged tissue. As such, stem cell derived exosomes are considered to be a potential new and novel approach in the treatment of various cardiac diseases.
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23
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Seto SW, Kiat H, Lee SMY, Bensoussan A, Sun YT, Hoi MPM, Chang D. Zebrafish models of cardiovascular diseases and their applications in herbal medicine research. Eur J Pharmacol 2015; 768:77-86. [PMID: 26494630 DOI: 10.1016/j.ejphar.2015.10.031] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Revised: 10/02/2015] [Accepted: 10/16/2015] [Indexed: 01/12/2023]
Abstract
The zebrafish (Danio rerio) has recently become a powerful animal model for cardiovascular research and drug discovery due to its ease of maintenance, genetic manipulability and ability for high-throughput screening. Recent advances in imaging techniques and generation of transgenic zebrafish have greatly facilitated in vivo analysis of cellular events of cardiovascular development and pathogenesis. More importantly, recent studies have demonstrated the functional similarity of drug metabolism systems between zebrafish and humans, highlighting the clinical relevance of employing zebrafish in identifying lead compounds in Chinese herbal medicine with potential beneficial cardiovascular effects. This paper seeks to summarise the scope of zebrafish models employed in cardiovascular studies and the application of these research models in Chinese herbal medicine to date.
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Affiliation(s)
- Sai-Wang Seto
- National Institute of Complementary Medicine, Western Sydney University, Campbelltown, NSW, Australia
| | - Hosen Kiat
- Faculty of Medicine, University of New South Wales, NSW, Australia; School of Medicine, Western Sydney University, Locked Bag 1797, Penrith, NSW, Australia; Faculty of Medicine and Health Sciences, Macquarie University, NSW, Australia
| | - Simon M Y Lee
- State Key Laboratory Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Alan Bensoussan
- National Institute of Complementary Medicine, Western Sydney University, Campbelltown, NSW, Australia
| | - Yu-Ting Sun
- National Institute of Complementary Medicine, Western Sydney University, Campbelltown, NSW, Australia
| | - Maggie P M Hoi
- State Key Laboratory Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Dennis Chang
- National Institute of Complementary Medicine, Western Sydney University, Campbelltown, NSW, Australia.
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24
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25
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Laiva AL, Venugopal JR, Navaneethan B, Karuppuswamy P, Ramakrishna S. Biomimetic approaches for cell implantation to the restoration of infarcted myocardium. Nanomedicine (Lond) 2015; 10:2907-30. [PMID: 26371367 DOI: 10.2217/nnm.15.124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Compelling evidences accumulated over the years have proven stem cells as a promising source for regenerative medicine. However, the inadequacy with the design of delivery modalities has prolonged the research in realizing an ideal cell-based approach for the regeneration of infarcted myocardium. Currently, some modest improvements in cardiac function have been documented in clinical trials with stem cell treatments, although regenerating a fully functional myocardium remains a dream for cardiac surgeons. This review provides an overview on the significance of stem cell therapy, the current attempts to resolve the drawbacks with the cell implantation approach and the various stratagems adopted with electrospun hybrid nanofibers for implementation in myocardial regenerative therapy.
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Affiliation(s)
- Ashang Luwang Laiva
- Center for Nanofibers & Nanotechnology, Nanoscience & Nanotechnology Initiative, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Block E3, #05-12, 2 Engineering Drive 3, Singapore 117576.,Amity Institute of Nanotechnology, Amity University, Noida, UP, India
| | - Jayarama Reddy Venugopal
- Center for Nanofibers & Nanotechnology, Nanoscience & Nanotechnology Initiative, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Block E3, #05-12, 2 Engineering Drive 3, Singapore 117576
| | - Balchandar Navaneethan
- Center for Nanofibers & Nanotechnology, Nanoscience & Nanotechnology Initiative, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Block E3, #05-12, 2 Engineering Drive 3, Singapore 117576
| | - Priyadharsini Karuppuswamy
- Center for Nanofibers & Nanotechnology, Nanoscience & Nanotechnology Initiative, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Block E3, #05-12, 2 Engineering Drive 3, Singapore 117576
| | - Seeram Ramakrishna
- Center for Nanofibers & Nanotechnology, Nanoscience & Nanotechnology Initiative, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Block E3, #05-12, 2 Engineering Drive 3, Singapore 117576
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26
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Clark AL, Naya FJ. MicroRNAs in the Myocyte Enhancer Factor 2 (MEF2)-regulated Gtl2-Dio3 Noncoding RNA Locus Promote Cardiomyocyte Proliferation by Targeting the Transcriptional Coactivator Cited2. J Biol Chem 2015; 290:23162-72. [PMID: 26240138 DOI: 10.1074/jbc.m115.672659] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Indexed: 01/04/2023] Open
Abstract
Understanding cell cycle regulation in postmitotic cardiomyocytes may lead to new therapeutic approaches to regenerate damaged cardiac tissue. We have demonstrated previously that microRNAs encoded by the Gtl2-Dio3 noncoding RNA locus function downstream of the MEF2A transcription factor in skeletal muscle regeneration. We have also reported expression of these miRNAs in the heart. Here we investigated the role of two Gtl2-Dio3 miRNAs, miR-410 and miR-495, in cardiac muscle. Overexpression of miR-410 and miR-495 robustly stimulated cardiomyocyte DNA synthesis and proliferation. Interestingly, unlike our findings in skeletal muscle, these miRNAs did not modulate the activity of the WNT signaling pathway. Instead, these miRNAs targeted Cited2, a coactivator required for proper cardiac development. Consistent with miR-410 and miR-495 overexpression, siRNA knockdown of Cited2 in neonatal cardiomyocytes resulted in robust proliferation. This phenotype was associated with reduced expression of Cdkn1c/p57/Kip2, a cell cycle inhibitor, and increased expression of VEGFA, a growth factor with proliferation-promoting effects. Therefore, miR-410 and miR-495 are among a growing number of miRNAs that have the ability to potently stimulate neonatal cardiomyocyte proliferation.
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Affiliation(s)
- Amanda L Clark
- From the Department of Biology, Program in Cell and Molecular Biology, Boston University, Boston, Massachusetts 02215
| | - Francisco J Naya
- From the Department of Biology, Program in Cell and Molecular Biology, Boston University, Boston, Massachusetts 02215
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Liang D, Li J, Wu Y, Zhen L, Li C, Qi M, Wang L, Deng F, Huang J, Lv F, Liu Y, Ma X, Yu Z, Zhang Y, Chen YH. miRNA-204 drives cardiomyocyte proliferation via targeting Jarid2. Int J Cardiol 2015; 201:38-48. [PMID: 26298346 DOI: 10.1016/j.ijcard.2015.06.163] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 06/11/2015] [Accepted: 06/29/2015] [Indexed: 02/07/2023]
Abstract
OBJECTIVES In mammals, the heart grows by hypertrophy but not proliferation of cardiomyocytes after birth. The paucity of cardiomyocyte proliferation limits cardiac regeneration in a variety of heart diseases. To explore the efficient strategies that drive cardiomyocyte proliferation, we employed in vitro and in vivo models to investigate the function of miRNA-204, which was demonstrated to regulate the proliferation and differentiation of human cardiac progenitor cells in our previous study. METHODS AND RESULTS miRNA-204 overexpression markedly promoted cardiomyocyte proliferation in both neonatal and adult rat cardiomyocytes in vitro. Transgenic mice with the cardiac-specific overexpression of miRNA-204 exhibited excessive cardiomyocyte proliferation throughout the embryonic and adult stages, leading to a pronounced increase in ventricular mass. Accordingly, the cell cycle regulators, including Cyclin A, Cyclin B, Cyclin D2, Cyclin E, CDC2 and PCNA, were upregulated in miRNA-204 transgenic embryonic hearts. Furthermore, we demonstrated that miRNA-204 directly targeted Jarid2. Knockdown of Jarid2 mimicked the pro-proliferative effect of miRNA-204 overexpression on cultured rat cardiomyocytes, whereas enhanced expression of Jarid2 conferred the myocytes with substantial resistance to proliferation by miRNA-204 overexpression. CONCLUSION Our findings identify a conserved role for miRNA-204 in regulating cardiomyocyte proliferation by targeting the Jarid2 signaling pathway.
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Affiliation(s)
- Dandan Liang
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Center for Translational Medicine, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China
| | - Jun Li
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Center for Translational Medicine, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China
| | - Yahan Wu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Lixiao Zhen
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Changming Li
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Man Qi
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Lijie Wang
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Fangfei Deng
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Jian Huang
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Fei Lv
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Yi Liu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Center for Translational Medicine, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China
| | - Xiue Ma
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China
| | - Zuoren Yu
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Center for Translational Medicine, Tongji University School of Medicine, Shanghai 200120, China
| | - Yuzhen Zhang
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Center for Translational Medicine, Tongji University School of Medicine, Shanghai 200120, China
| | - Yi-Han Chen
- Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Research Center for Translational Medicine, Tongji University School of Medicine, Shanghai 200120, China; Institute of Medical Genetics, Tongji University, Shanghai 200092, China; Department of Cardiology, East Hospital, Tongji University School of Medicine, Shanghai 200120, China; Department of Pathology and Pathophysiology, Tongji University School of Medicine, Shanghai 200092, China.
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Abdulmahdi W, Zullo J, Nesi L, Goligorksy MS, Ratliff BB. Charting the course of renal cryoinjury. Physiol Rep 2015; 3:3/4/e12357. [PMID: 25896979 PMCID: PMC4425963 DOI: 10.14814/phy2.12357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We sought to characterize a minor renal cryoinjury that allows investigation into renal damage processes and subsequent endogenous repair mechanisms. To achieve this, we induced a small cryoinjury to mice, in which the transient superficial application of a liquid nitrogen-cooled cryoprobe to the exposed kidney induces a localized lesion that did not impair renal function. The resulting cryoinjury was examined by immunohistochemistry and Laser-Doppler flowmetry. Within hours of cryoinjury induction, tubular and vascular necrotic damage was observed, while blood flow in the directly injured area was reduced by 65%. The injured area demonstrated a peak in tubular and perivascular cell proliferation at 4 days postinjury, while apoptosis and fibrosis peaked at day 7. Infiltration of macrophages into the injury was first observed at day 4, and peaked at day 7. Vascular density in the direct injured area was lowest at day 7. As compared to the direct injured area, the (peripheral) penumbral region surrounding the directly injured area demonstrated enhanced cellular proliferation (2.5-6-fold greater), vascular density (1.6-2.9 fold greater) and blood perfusion (twofold greater). After 4 weeks, the area of damage was reduced by 73%, fibrosis decreased by 50% and blood flow in the direct injured area was reestablished by 63% with almost complete perfusion restoration in the injury's penumbral region. In conclusion, kidney cryoinjury provides a flexible facile model for the study of renal damage and associated endogenous repair processes.
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Affiliation(s)
- Wasan Abdulmahdi
- Department of Medicine, Renal Research Institute, New York Medical College, Valhalla, New York, USA Department of Pathology, Renal Research Institute, New York Medical College, Valhalla, New York, USA
| | - Joseph Zullo
- Department of Medicine, Renal Research Institute, New York Medical College, Valhalla, New York, USA
| | - Lauren Nesi
- Department of Medicine, Renal Research Institute, New York Medical College, Valhalla, New York, USA
| | - Michael S Goligorksy
- Department of Medicine, Renal Research Institute, New York Medical College, Valhalla, New York, USA Department of Pharmacology, Renal Research Institute, New York Medical College, Valhalla, New York, USA Department of Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA
| | - Brian B Ratliff
- Department of Medicine, Renal Research Institute, New York Medical College, Valhalla, New York, USA Department of Physiology, Renal Research Institute, New York Medical College, Valhalla, New York, USA
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Paradis AN, Gay MS, Wilson CG, Zhang L. Newborn hypoxia/anoxia inhibits cardiomyocyte proliferation and decreases cardiomyocyte endowment in the developing heart: role of endothelin-1. PLoS One 2015; 10:e0116600. [PMID: 25692855 PMCID: PMC4334650 DOI: 10.1371/journal.pone.0116600] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Accepted: 12/12/2014] [Indexed: 12/01/2022] Open
Abstract
In the developing heart, cardiomyocytes undergo terminal differentiation during a critical window around birth. Hypoxia is a major stress to preterm infants, yet its effect on the development and maturation of the heart remains unknown. We tested the hypothesis in a rat model that newborn anoxia accelerates cardiomyocyte terminal differentiation and results in reduced cardiomyocyte endowment in the developing heart via an endothelin-1-dependent mechanism. Newborn rats were exposed to anoxia twice daily from postnatal day 1 to 3, and hearts were isolated and studied at postnatal day 4 (P4), 7 (P7), and 14 (P14). Anoxia significantly increased HIF-1α protein expression and pre-proET-1 mRNA abundance in P4 neonatal hearts. Cardiomyocyte proliferation was significantly decreased by anoxia in P4 and P7, resulting in a significant reduction of cardiomyocyte number per heart weight in the P14 neonates. Furthermore, the expression of cyclin D2 was significantly decreased due to anoxia, while p27 expression was increased. Anoxia has no significant effect on cardiomyocyte binucleation or myocyte size. Consistently, prenatal hypoxia significantly decreased cardiomyocyte proliferation but had no effect on binucleation in the fetal heart. Newborn administration of PD156707, an ETA-receptor antagonist, significantly increased cardiomyocyte proliferation at P4 and cell size at P7, resulting in an increase in the heart to body weight ratio in P7 neonates. In addition, PD156707 abrogated the anoxia-mediated effects. The results suggest that hypoxia and anoxia via activation of endothelin-1 at the critical window of heart development inhibits cardiomyocyte proliferation and decreases myocyte endowment in the developing heart, which may negatively impact cardiac function later in life.
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Affiliation(s)
- Alexandra N. Paradis
- Center for Perinatal Biology, Division of Pharmacology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California, United States of America
| | - Maresha S. Gay
- Center for Perinatal Biology, Division of Pharmacology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California, United States of America
| | - Christopher G. Wilson
- Center for Perinatal Biology, Division of Pharmacology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California, United States of America
- Division of Neonatology, Loma Linda University School of Medicine, Loma Linda, California, United States of America
| | - Lubo Zhang
- Center for Perinatal Biology, Division of Pharmacology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, California, United States of America
- * E-mail:
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30
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Lu XL, Rubart M. Micron-scale voltage and [Ca(2+)]i imaging in the intact heart. Front Physiol 2014; 5:451. [PMID: 25520663 PMCID: PMC4251286 DOI: 10.3389/fphys.2014.00451] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Accepted: 11/03/2014] [Indexed: 12/03/2022] Open
Abstract
Studies in isolated cardiomyocytes have provided tremendous information at the cellular and molecular level concerning regulation of transmembrane voltage (Vm) and intracellular calcium ([Ca2+]i). The ability to use the information gleaned to gain insight into the function of ion channels and Ca2+ handling proteins in a more complex system, e.g., the intact heart, has remained a challenge. We have developed laser scanning fluorescence microscopy-based approaches to monitor, at the sub-cellular to multi-cellular level in the immobilized, Langendorff-perfused mouse heart, dynamic changes in [Ca2+]i and Vm. This article will review the use of single- or dual-photon laser scanning microscopy [Ca2+]i imaging in conjunction with transgenic reporter technology to (a) interrogate the extent to which transplanted, donor-derived myocytes or cardiac stem cell-derived de novo myocytes are capable of forming a functional syncytium with the pre-existing myocardium, using entrainment of [Ca2+]i transients by the electrical activity of the recipient heart as a surrogate for electrical coupling, and (b) characterize the Ca2+ handling phenotypes of cellular implants. Further, we will review the ability of laser scanning fluorescence microscopy in conjunction with a fast-response voltage-sensitive to resolve, on a subcellular level in Langendorff-perfused mouse hearts, Vm dynamics that typically occur during the course of a cardiac action potential. Specifically, the utility of this technique to measure microscopic-scale voltage gradients in the normal and diseased heart is discussed.
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Affiliation(s)
- Xiao-Long Lu
- Riley Heart Research Center, Department of Pediatrics, Wells Center for Pediatric Research, Indiana University School of Medicine Indianapolis, IN, USA
| | - Michael Rubart
- Riley Heart Research Center, Department of Pediatrics, Wells Center for Pediatric Research, Indiana University School of Medicine Indianapolis, IN, USA
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31
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Cho GS, Fernandez L, Kwon C. Regenerative medicine for the heart: perspectives on stem-cell therapy. Antioxid Redox Signal 2014; 21:2018-31. [PMID: 25133793 PMCID: PMC4208610 DOI: 10.1089/ars.2014.6063] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
SIGNIFICANCE Despite decades of progress in cardiovascular biology and medicine, heart disease remains the leading cause of death, and there is no cure for the failing heart. Since heart failure is mostly caused by loss or dysfunction of cardiomyocytes (CMs), replacing dead or damaged CMs with new CMs might be an ideal way to reverse the disease. However, the adult heart is composed mainly of terminally differentiated CMs that have no significant self-regeneration capacity. RECENT ADVANCES Stem cells have tremendous regenerative potential and, thus, current cardiac regenerative research has focused on developing stem cell sources to repair damaged myocardium. CRITICAL ISSUES In this review, we examine the potential sources of cells that could be used for heart therapies, including embryonic stem cells and induced pluripotent stem cells, as well as alternative methods for activating the endogenous regenerative mechanisms of the heart via transdifferentiation and cell reprogramming. We also discuss the current state of knowledge of cell purification, delivery, and retention. FUTURE DIRECTIONS Efforts are underway to improve the current stem cell strategies and methodologies, which will accelerate the development of innovative stem-cell therapies for heart regeneration.
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Affiliation(s)
- Gun-Sik Cho
- Division of Cardiology, Department of Medicine, Institute for Cell Engineering, Johns Hopkins University , Baltimore, Maryland
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Sharp TE, George JC. Stem cell therapy and breast cancer treatment: review of stem cell research and potential therapeutic impact against cardiotoxicities due to breast cancer treatment. Front Oncol 2014; 4:299. [PMID: 25405100 PMCID: PMC4217360 DOI: 10.3389/fonc.2014.00299] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 10/14/2014] [Indexed: 12/16/2022] Open
Abstract
A new problem has emerged with the ever-increasing number of breast cancer survivors. While early screening and advances in treatment have allowed these patients to overcome their cancer, these treatments often have adverse cardiovascular side effects that can produce abnormal cardiovascular function. Chemotherapeutic and radiation therapy have both been linked to cardiotoxicity; these therapeutics can cause a loss of cardiac muscle and deterioration of vascular structure that can eventually lead to heart failure (HF). This cardiomyocyte toxicity can leave the breast cancer survivor with a probable diagnosis of dilated or restrictive cardiomyopathy (DCM or RCM). While current HF standard of care can alleviate symptoms, other than heart transplantation, there is no therapy that replaces cardiac myocytes that are killed during cancer therapies. There is a need to develop novel therapeutics that can either prevent or reverse the cardiac injury caused by cancer therapeutics. These new therapeutics should promote the regeneration of lost or deteriorating myocardium. Over the last several decades, the therapeutic potential of cell-based therapy has been investigated for HF patients. In this review, we discuss the progress of pre-clinical and clinical stem cell research for the diseased heart and discuss the possibility of utilizing these novel therapies to combat cardiotoxicity observed in breast cancer survivors.
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Affiliation(s)
- Thomas E Sharp
- Cardiovascular Research Center, Temple University School of Medicine , Philadelphia, PA , USA
| | - Jon C George
- Cardiovascular Research Center, Temple University School of Medicine , Philadelphia, PA , USA ; Division of Cardiovascular Medicine, Temple University Hospital , Philadelphia, PA , USA
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33
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Gilsbach R, Preissl S, Grüning BA, Schnick T, Burger L, Benes V, Würch A, Bönisch U, Günther S, Backofen R, Fleischmann BK, Schübeler D, Hein L. Dynamic DNA methylation orchestrates cardiomyocyte development, maturation and disease. Nat Commun 2014; 5:5288. [PMID: 25335909 PMCID: PMC4220495 DOI: 10.1038/ncomms6288] [Citation(s) in RCA: 213] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 09/17/2014] [Indexed: 01/20/2023] Open
Abstract
The heart is a highly specialized organ with essential function for the organism throughout life. The significance of DNA methylation in shaping the phenotype of the heart remains only partially known. Here we generate and analyse DNA methylomes from highly purified cardiomyocytes of neonatal, adult healthy and adult failing hearts. We identify large genomic regions that are differentially methylated during cardiomyocyte development and maturation. Demethylation of cardiomyocyte gene bodies correlates strongly with increased gene expression. Silencing of demethylated genes is characterized by the polycomb mark H3K27me3 or by DNA methylation. De novo methylation by DNA methyltransferases 3A/B causes repression of fetal cardiac genes, including essential components of the cardiac sarcomere. Failing cardiomyocytes partially resemble neonatal methylation patterns. This study establishes DNA methylation as a highly dynamic process during postnatal growth of cardiomyocytes and their adaptation to pathological stress in a process tightly linked to gene regulation and activity. DNA methylation is essential for proper gene expression, development and genome stability. Here the authors present whole-genome DNA methylation analyses of purified mouse cardiomyocytes from newborn, adult and failing hearts and find highly dynamic patterns between the three phenotypes of cardiomyocytes.
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Affiliation(s)
- Ralf Gilsbach
- Institute of Experimental and Clinical Pharmacology and Toxicology, University of Freiburg, Albertstrasse 25, 79104 Freiburg, Germany
| | - Sebastian Preissl
- 1] Institute of Experimental and Clinical Pharmacology and Toxicology, University of Freiburg, Albertstrasse 25, 79104 Freiburg, Germany [2] Hermann Staudinger Graduate School, University of Freiburg, Albertstrasse 21, 79104 Freiburg, Germany
| | - Björn A Grüning
- 1] Bioinformatics Group, Department of Computer Science, University of Freiburg, Georges-Köhler-Allee 106, 79110 Freiburg, Germany [2] Pharmaceutical Bioinformatics, Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Strasse 9, 79104 Freiburg, Germany
| | - Tilman Schnick
- 1] Institute of Experimental and Clinical Pharmacology and Toxicology, University of Freiburg, Albertstrasse 25, 79104 Freiburg, Germany [2] University Heart Center Freiburg/Bad Krozingen, Department of Congenital Heart Defects and Paediatric Cardiology, University of Freiburg, Hugstetter Strasse 55, 79106 Freiburg, Germany
| | - Lukas Burger
- 1] Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland [2] Swiss Institute of Bioinformatics, Maulbeerstrasse 66, 4058 Basel, Switzerland
| | - Vladimir Benes
- European Molecular Biology Laboratory, Genomics Core Facility, Meyerhofstraße 1, 69117 Heidelberg, Germany
| | - Andreas Würch
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Ulrike Bönisch
- Max Planck Institute of Immunobiology and Epigenetics, Stübeweg 51, 79108 Freiburg, Germany
| | - Stefan Günther
- Pharmaceutical Bioinformatics, Institute of Pharmaceutical Sciences, University of Freiburg, Hermann-Herder-Strasse 9, 79104 Freiburg, Germany
| | - Rolf Backofen
- Bioinformatics Group, Department of Computer Science, University of Freiburg, Georges-Köhler-Allee 106, 79110 Freiburg, Germany
| | - Bernd K Fleischmann
- Institute of Physiology I, Life and Brain Center, University of Bonn, Sigmund-Freud-Straße 25, 53127 Bonn, Germany
| | - Dirk Schübeler
- 1] Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, 4058 Basel, Switzerland [2] University of Basel, Petersplatz 1, 4003 Basel, Switzerland
| | - Lutz Hein
- 1] Institute of Experimental and Clinical Pharmacology and Toxicology, University of Freiburg, Albertstrasse 25, 79104 Freiburg, Germany [2] BIOSS Centre for Biological Signalling Studies, University of Freiburg, Schänzlestrasse 18, 79104 Freiburg, Germany
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Abstract
Various stem cell types have been tested for regenerating damaged myocardium after myocardial infarction. However, the results of clinical trials have not been consistent, with only some of the trials reporting small improvements in cardiac function. It seems that engraftment and survival of injected cells is limited and transplanted stem cells either do not differentiate into cardiac cells or differentiate into only limited number of cardiac cells. The exact mechanism(s) of cardiac functional improvement by cell therapy are unclear, but paracrine effect may play a central role. The resident cardiac progenitor cells identified within the adult myocardium have distinct advantages over other stem cell types for cardiac cell therapy, as they are likely precommitted to the cardiovascular fate. However, isolating and expanding these cells from cardiac biopsies is a challenge. More recently, direct reprogramming of fibroblasts into cardiomyocytes has given new hope for myocardial regeneration. Here we will review different stem cells used in cardiac cell therapy with a focus on the native cardiac progenitor cells and briefly outline future directions of cardiac cell therapy.
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Bhaarathy V, Venugopal J, Gandhimathi C, Ponpandian N, Mangalaraj D, Ramakrishna S. Biologically improved nanofibrous scaffolds for cardiac tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 44:268-77. [PMID: 25280706 DOI: 10.1016/j.msec.2014.08.018] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 06/26/2014] [Accepted: 08/02/2014] [Indexed: 12/19/2022]
Abstract
Nanofibrous structure developed by electrospinning technology provides attractive extracellular matrix conditions for the anchorage, migration and differentiation of stem cells, including those responsible for regenerative medicine. Recently, biocomposite nanofibers consisting of two or more polymeric blends are electrospun more tidily in order to obtain scaffolds with desired functional and mechanical properties depending on their applications. The study focuses on one such an attempt of using copolymer Poly(l-lactic acid)-co-poly (ε-caprolactone) (PLACL), silk fibroin (SF) and Aloe Vera (AV) for fabricating biocomposite nanofibrous scaffolds for cardiac tissue engineering. SEM micrographs of fabricated electrospun PLACL, PLACL/SF and PLACL/SF/AV nanofibrous scaffolds are porous, beadless, uniform nanofibers with interconnected pores and obtained fibre diameter in the range of 459 ± 22 nm, 202 ± 12 nm and 188 ± 16 nm respectively. PLACL, PLACL/SF and PLACL/SF/AV electrospun mats obtained at room temperature with an elastic modulus of 14.1 ± 0.7, 9.96 ± 2.5 and 7.0 ± 0.9 MPa respectively. PLACL/SF/AV nanofibers have more desirable properties to act as flexible cell supporting scaffolds compared to PLACL for the repair of myocardial infarction (MI). The PLACL/SF and PLACL/SF/AV nanofibers had a contact angle of 51 ± 12° compared to that of 133 ± 15° of PLACL alone. Cardiac cell proliferation was increased by 21% in PLACL/SF/AV nanofibers compared to PLACL by day 6 and further increased to 42% by day 9. Confocal analysis for cardiac expression proteins myosin and connexin 43 was observed better by day 9 compared to all other nanofibrous scaffolds. The results proved that the fabricated PLACL/SF/AV nanofibrous scaffolds have good potentiality for the regeneration of infarcted myocardium in cardiac tissue engineering.
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Affiliation(s)
- V Bhaarathy
- Centre for Nanofibers & Nanotechnology, NUSNNI, Faculty of Engineering, National University of Singapore, 117576, Singapore; Department of Nanoscience and Technology, School of Physical Sciences, Bharathiar University, Coimbatore 641046, India; Lee Kong Chian School of Medicine, Nanyang Technological University, 138673, Singapore
| | - J Venugopal
- Centre for Nanofibers & Nanotechnology, NUSNNI, Faculty of Engineering, National University of Singapore, 117576, Singapore.
| | - C Gandhimathi
- Centre for Nanofibers & Nanotechnology, NUSNNI, Faculty of Engineering, National University of Singapore, 117576, Singapore
| | - N Ponpandian
- Department of Nanoscience and Technology, School of Physical Sciences, Bharathiar University, Coimbatore 641046, India
| | - D Mangalaraj
- Department of Nanoscience and Technology, School of Physical Sciences, Bharathiar University, Coimbatore 641046, India
| | - S Ramakrishna
- Centre for Nanofibers & Nanotechnology, NUSNNI, Faculty of Engineering, National University of Singapore, 117576, Singapore
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Impact of neonatal sertraline exposure on the post-myocardial infarction outcomes of adult male mice. J Cardiovasc Pharmacol 2014; 62:479-84. [PMID: 23921310 DOI: 10.1097/fjc.0b013e3182a4db90] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Neonatal exposure to a selective serotonin reuptake inhibitor (SSRI) leads to decreased left ventricular volumes and sympathetic activation in adult mice. We hypothesized this neonatal SSRI exposure-induced small left heart syndrome would increase post-myocardial infarction (MI) morbidity and mortality. C57BL/6 mice received saline or sertraline (5 mg/kg intraperitoneally) on postnatal days 1-14. At 5 months, male mice underwent coronary artery ligation and were monitored by radiotelemetry until death or 4 weeks after ligation. After ligation, SSRI-exposed mice had increased heart rates (SSRI, 516 ± 13 bpm; control, 470 ± 15 bpm; P < 0.05). SSRI-exposed mice had significant reductions in left ventricular systolic volumes both before and after coronary ligation (SSRI: baseline = 20 ± 3 μL, post-MI = 37 ± 10 μL; control: baseline = 30 ± 3 μL, post-MI = 65 ± 23 μL). Post-MI echocardiography showed significantly decreased ejection fraction in control mice (baseline = 60% ± 4%, post-MI = 41% ± 2%, P < 0.01) but not the SSRI-exposed mice (baseline = 65% ± 3%, post-MI = 53% ± 7%). Neonatal SSRI exposure did not significantly alter post-MI survival. We conclude that the preexisting SSRI-induced small left heart syndrome may provide protection from post-MI ventricular dilation.
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37
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Xiong JW, Chang NN. Recent advances in heart regeneration. ACTA ACUST UNITED AC 2014; 99:160-9. [PMID: 24078494 DOI: 10.1002/bdrc.21039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2013] [Revised: 07/27/2013] [Accepted: 07/27/2013] [Indexed: 12/25/2022]
Abstract
Although cardiac stem cells (CSCs) and tissue engineering are very promising for cardiac regenerative medicine, studies with model organisms for heart regeneration will provide alternative therapeutic targets and opportunities. Here, we present a review on heart regeneration, with a particular focus on the most recent work in mouse and zebrafish. We attempt to summarize the recent progresses and bottlenecks of CSCs and tissue engineering for heart regeneration; and emphasize what we have learned from mouse and zebrafish regenerative models on discovering crucial genetic and epigenetic factors for stimulating heart regeneration; and speculate the potential application of these regenerative factors for heart failure. A brief perspective highlights several important and promising research directions in this exciting field.
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Affiliation(s)
- Jing-Wei Xiong
- are from Institute of Molecular Medicine, Peking University, Beijing, 100871, China and State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100871, China
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Lerchenmüller C, Rosenzweig A. Mechanisms of exercise-induced cardiac growth. Drug Discov Today 2014; 19:1003-9. [PMID: 24637046 DOI: 10.1016/j.drudis.2014.03.010] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Accepted: 03/07/2014] [Indexed: 01/02/2023]
Abstract
Exercise is a well-established intervention for the prevention and treatment of cardiovascular disease. Increase in cardiomyocyte size is likely to be the central mechanism of exercise-induced cardiac growth, but recent research also supports a role for the generation of new cardiomyocytes as a contributor to physiological cardiac growth. Other cardiac cell types also respond to exercise. For example, endothelial cells are important for the regulation of large vessels and expansion of microvasculature in meeting demands of the growing heart. Cardiac fibroblasts are known to generate and respond to important signals from their environment, but their role in exercise is less well defined. Therefore, cardiac growth relies on complex, finely regulated and interdependent signaling pathways as well as cross-talk among cardiac cell types.
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Affiliation(s)
- Carolin Lerchenmüller
- Cardiovascular Division, Beth Israel Deaconess Medical Center, Boston, MA, USA; Harvard Medical School, Boston, MA, USA
| | - Anthony Rosenzweig
- Cardiovascular Division, Beth Israel Deaconess Medical Center, Boston, MA, USA; Harvard Medical School, Boston, MA, USA.
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Rubach M, Adelmann R, Haustein M, Drey F, Pfannkuche K, Xiao B, Koester A, Udink ten Cate FEA, Choi YH, Neef K, Fatima A, Hannes T, Pillekamp F, Hescheler J, Šarić T, Brockmeier K, Khalil M. Mesenchymal stem cells and their conditioned medium improve integration of purified induced pluripotent stem cell-derived cardiomyocyte clusters into myocardial tissue. Stem Cells Dev 2014; 23:643-53. [PMID: 24219308 DOI: 10.1089/scd.2013.0272] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Induced pluripotent stem cell-derived cardiomyocytes (iPS-CMs) might become therapeutically relevant to regenerate myocardial damage. Purified iPS-CMs exhibit poor functional integration into myocardial tissue. The aim of this study was to investigate whether murine mesenchymal stem cells (MSCs) or their conditioned medium (MScond) improves the integration of murine iPS-CMs into myocardial tissue. Vital or nonvital embryonic murine ventricular tissue slices were cocultured with purified clusters of iPS-CMs in combination with murine embryonic fibroblasts (MEFs), MSCs, or MScond. Morphological integration was assessed by visual scoring and functional integration by isometric force and field potential measurements. We observed a moderate morphological integration of iPS-CM clusters into vital, but a poor integration into nonvital, slices. MEFs and MSCs but not MScond improved morphological integration of CMs into nonvital slices and enabled purified iPS-CMs to confer force. Coculture of vital slices with iPS-CMs and MEFs or MSCs resulted in an improved electrical integration. A comparable improvement of electrical coupling was achieved with the cell-free MScond, indicating that soluble factors secreted by MSCs were involved in electrical coupling. We conclude that cells such as MSCs support the engraftment and adhesion of CMs, and confer force to noncontractile tissue. Furthermore, soluble factors secreted by MSCs mediate electrical coupling of purified iPS-CM clusters to myocardial tissue. These data suggest that MSCs may increase the functional engraftment and therapeutic efficacy of transplanted iPS-CMs into infarcted myocardium.
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Affiliation(s)
- Martin Rubach
- 1 Department of Pediatric Cardiology, University of Cologne , Cologne, Germany
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Abstract
Myocardial infarction leads to loss of cardiomyocytes, scar formation, ventricular remodeling and eventually deterioration of heart function. Over the past decade, stem cell therapy has emerged as a novel strategy for patients with ischemic heart disease and its beneficial effects have been demonstrated by substantial preclinical and clinical studies. Efficacy of several types of stem cells in the therapy of cardiovascular diseases has already been evaluated. However, repair of injured myocardium through stem cell transplantation is restricted by critical safety issues and ethic concerns. Recently, the discovery of cardiac stem cells (CSCs) that reside in the heart itself brings new prospects for myocardial regeneration and reconstitution of cardiac tissues. CSCs are positive for various stem cell markers and have the potential of self-renewal and multilineage differentiation. They play a pivotal role in the maintenance of heart homeostasis and cardiac repair. Elucidation of their biological characteristics and functions they exert in myocardial infarction are very crucial to further investigations on them. This review will focus on the field of cardiac stem cells and discuss technical and practical issues that may involve in their clinical applications in myocardial infarction.
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Adenylate Kinase Isoform Network: A Major Hub in Cell Energetics and Metabolic Signaling. SYSTEMS BIOLOGY OF METABOLIC AND SIGNALING NETWORKS 2014. [DOI: 10.1007/978-3-642-38505-6_6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Sreejit P, Verma RS. Natural ECM as biomaterial for scaffold based cardiac regeneration using adult bone marrow derived stem cells. Stem Cell Rev Rep 2013; 9:158-71. [PMID: 23319217 DOI: 10.1007/s12015-013-9427-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cellular therapy using stem cells for cardiac diseases has recently gained much interest in the scientific community due to its potential in regenerating damaged and even dead tissue and thereby restoring the organ function. Stem cells from various sources and origin are being currently used for regeneration studies directly or along with differentiation inducing agents. Long term survival and minimal side effects can be attained by using autologous cells and reduced use of inducing agents. Cardiomyogenic differentiation of adult derived stem cells has been previously reported using various inducing agents but the use of a potentially harmful DNA demethylating agent 5-azacytidine (5-azaC) has been found to be critical in almost all studies. Alternate inducing factors and conditions/stimulant like physical condition including electrical stimulation, chemical inducers and biological agents have been attempted by numerous groups to induce cardiac differentiation. Biomaterials were initially used as artificial scaffold in in vitro studies and later as a delivery vehicle. Natural ECM is the ideal biological scaffold since it contains all the components of the tissue from which it was derived except for the living cells. Constructive remodeling can be performed using such natural ECM scaffolds and stem cells since, the cells can be delivered to the site of infraction and once delivered the cells adhere and are not "lost". Due to the niche like conditions of ECM, stem cells tend to differentiate into tissue specific cells and attain several characteristics similar to that of functional cells even in absence of any directed differentiation using external inducers. The development of niche mimicking biomaterials and hybrid biomaterial can further advance directed differentiation without specific induction. The mechanical and electrical integration of these materials to the functional tissue is a problem to be addressed. The search for the perfect extracellular matrix for therapeutic applications including engineering cardiac tissue structures for post ischemic cardiac tissue regeneration continues.
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Affiliation(s)
- P Sreejit
- Stem Cell and Molecular Biology Laboratory, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, 600036, TN, India
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Anversa P, Leri A. Innate regeneration in the aging heart: healing from within. Mayo Clin Proc 2013; 88:871-83. [PMID: 23910414 PMCID: PMC3936323 DOI: 10.1016/j.mayocp.2013.04.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 03/29/2013] [Accepted: 04/01/2013] [Indexed: 12/31/2022]
Abstract
The concept of the heart as a terminally differentiated organ incapable of replacing damaged myocytes has been at the center of cardiovascular research and therapeutic development for the past 50 years. The progressive decline in myocyte number as a function of age and the formation of scarred tissue after myocardial infarction have been interpreted as irrefutable proofs of the postmitotic characteristic of the heart. However, emerging evidence supports a more dynamic view of the heart in which cell death and renewal are vital components of the remodeling process that governs cardiac homeostasis, aging, and disease. The identification of dividing myocytes in the adult and senescent heart raises the important question concerning the origin of these newly formed cells. In vitro and in vivo findings strongly suggest that replicating myocytes derive from lineage determination of resident primitive cells, supporting the notion that cardiomyogenesis is controlled by activation and differentiation of a stem cell compartment. It is the current view that the myocardium is an organ permissive of tissue regeneration mediated by exogenous and endogenous progenitor cells.
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Affiliation(s)
- Piero Anversa
- Department of Anesthesia, Department of Medicine, and Division of Cardiovascular Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA.
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Drawnel FM, Archer CR, Roderick HL. The role of the paracrine/autocrine mediator endothelin-1 in regulation of cardiac contractility and growth. Br J Pharmacol 2013; 168:296-317. [PMID: 22946456 DOI: 10.1111/j.1476-5381.2012.02195.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Revised: 08/23/2012] [Accepted: 08/28/2012] [Indexed: 12/20/2022] Open
Abstract
UNLABELLED Endothelin-1 (ET-1) is a critical autocrine and paracrine regulator of cardiac physiology and pathology. Produced locally within the myocardium in response to diverse mechanical and neurohormonal stimuli, ET-1 acutely modulates cardiac contractility. During pathological cardiovascular conditions such as ischaemia, left ventricular hypertrophy and heart failure, myocyte expression and activity of the entire ET-1 system is enhanced, allowing the peptide to both initiate and maintain maladaptive cellular responses. Both the acute and chronic effects of ET-1 are dependent on the activation of intracellular signalling pathways, regulated by the inositol-trisphosphate and diacylglycerol produced upon activation of the ET(A) receptor. Subsequent stimulation of protein kinases C and D, calmodulin-dependent kinase II, calcineurin and MAPKs modifies the systolic calcium transient, myofibril function and the activity of transcription factors that coordinate cellular remodelling. The precise nature of the cellular response to ET-1 is governed by the timing, localization and context of such signals, allowing the peptide to regulate both cardiomyocyte physiology and instigate disease. LINKED ARTICLES This article is part of a themed section on Endothelin. To view the other articles in this section visit http://dx.doi.org/10.1111/bph.2013.168.issue-1.
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Affiliation(s)
- Faye M Drawnel
- Babraham Research Campus, Babraham Institute, Cambridge, UK
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Moon SH, Kang SW, Park SJ, Bae D, Kim SJ, Lee HA, Kim KS, Hong KS, Kim JS, Do JT, Byun KH, Chung HM. The use of aggregates of purified cardiomyocytes derived from human ESCs for functional engraftment after myocardial infarction. Biomaterials 2013; 34:4013-4026. [DOI: 10.1016/j.biomaterials.2013.02.022] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2013] [Accepted: 02/10/2013] [Indexed: 11/15/2022]
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Chen J, Huang ZP, Seok HY, Ding J, Kataoka M, Zhang Z, Hu X, Wang G, Lin Z, Wang S, Pu WT, Liao R, Wang DZ. mir-17-92 cluster is required for and sufficient to induce cardiomyocyte proliferation in postnatal and adult hearts. Circ Res 2013; 112:1557-66. [PMID: 23575307 DOI: 10.1161/circresaha.112.300658] [Citation(s) in RCA: 296] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
RATIONALE Cardiomyocytes in adult mammalian hearts are terminally differentiated cells that have exited from the cell cycle and lost most of their proliferative capacity. Death of mature cardiomyocytes in pathological cardiac conditions and the lack of regeneration capacity of adult hearts are primary causes of heart failure and mortality. However, how cardiomyocyte proliferation in postnatal and adult hearts becomes suppressed remains largely unknown. The miR-17-92 cluster was initially identified as a human oncogene that promotes cell proliferation. However, its role in the heart remains unknown. OBJECTIVE To test the hypothesis that miR-17-92 participates in the regulation of cardiomyocyte proliferation in postnatal and adult hearts. METHODS AND RESULTS We deleted miR-17-92 cluster from embryonic and postnatal mouse hearts and demonstrated that miR-17-92 is required for cardiomyocyte proliferation in the heart. Transgenic overexpression of miR-17-92 in cardiomyocytes is sufficient to induce cardiomyocyte proliferation in embryonic, postnatal, and adult hearts. Moreover, overexpression of miR-17-92 in adult cardiomyocytes protects the heart from myocardial infarction-induced injury. Similarly, we found that members of miR-17-92 cluster, miR-19 in particular, are required for and sufficient to induce cardiomyocyte proliferation in vitro. We identified phosphatase and tensin homolog, a tumor suppressor, as an miR-17-92 target to mediate the function of miR-17-92 in cardiomyocyte proliferation. CONCLUSIONS Our studies therefore identify miR-17-92 as a critical regulator of cardiomyocyte proliferation, and suggest this cluster of microRNAs could become therapeutic targets for cardiac repair and heart regeneration.
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Affiliation(s)
- Jinghai Chen
- Department of Cardiology, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
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Abstract
The heart holds the monumental yet monotonous task of maintaining circulation. Although cardiac function is critical to other organs and to life itself, mammals are not equipped with significant natural capacity to replace heart muscle that has been lost by injury. This deficiency plays a role in leaving millions worldwide vulnerable to heart failure each year. By contrast, certain other vertebrate species such as zebrafish are strikingly good at heart regeneration. A cellular and molecular understanding of endogenous regenerative mechanisms and advances in methodology to transplant cells together project a future in which cardiac muscle regeneration can be therapeutically stimulated in injured human hearts. This review focuses on what has been discovered recently about cardiac regenerative capacity and how natural mechanisms of heart regeneration in model systems are stimulated and maintained.
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Affiliation(s)
- Kazu Kikuchi
- Developmental and Stem Cell Biology Division, Victor Chang Cardiac Research Institute, Darlinghurst, New South Wales 2010, Australia.
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Abstract
This article discusses current understanding of myocardial biology, emphasizing the regeneration potential of the adult human heart and the mechanisms involved. In the last decade, a novel conceptual view has emerged. The heart is no longer considered a postmitotic organ, but is viewed as a self-renewing organ characterized by a resident stem cell compartment responsible for tissue homeostasis and cardiac repair following injury. Additionally, HSCs possess the ability to transdifferentiate and acquire the cardiomyocyte, vascular endothelial, and smooth muscle cell lineages. Both cardiac and hematopoietic stem cells may be used therapeutically in an attempt to reverse the devastating consequences of chronic heart failure of ischemic and nonischemic origin.
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Affiliation(s)
- Piero Anversa
- Department of Anesthesia and Division of Cardiovascular Medicine, 75 Francis Street, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA.
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Circulation Research
Thematic Synopsis Cardiac Myocyte Biology and Function. Circ Res 2012. [DOI: 10.1161/circresaha.112.280974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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