1
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Li Q, Zhang H, Liu R, Wang L, Guo X, You H, Xue J, Luo D. A modified method for isolating sinoatrial node myocytes from adult mice. In Vitro Cell Dev Biol Anim 2024; 60:815-823. [PMID: 38898365 DOI: 10.1007/s11626-024-00920-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2023] [Accepted: 04/19/2024] [Indexed: 06/21/2024]
Abstract
Sinoatrial node (SAN) is the pacemaker of the heart in charge of initiating spontaneous electronical activity and controlling heart rate. Myocytes from SAN can generate spontaneous rhythmic action potentials, which propagate through the myocardium, thereby triggering cardiac myocyte contraction. Acutely, the method for isolating sinoatrial node myocytes (SAMs) is critical in studying the protein expression and function of myocytes in SAN. Currently, the SAMs were isolated by transferring SAN tissue directly into the digestion solution, but it is difficult to judge the degree of digestion, and the system was unstable. Here, we present a modified protocol for the isolation of SAMs in mice, based on the collagenase II and protease perfusion of the heart using a Langendorff apparatus and subsequent dissociation of SAMs. The appearance and droplet flow rate of the heart could be significantly changed during enzymatic digestion via perfusion, which allowed us to easily judge the degree of digestion and avoid incomplete or excessive digestion. The SAMs with stable yield and viability achieved from our optimized approach would facilitate the follow-up experiments.
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Affiliation(s)
- Qiang Li
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Hanying Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Ronghua Liu
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Luqi Wang
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Xintong Guo
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Hongjie You
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China
| | - Jingyi Xue
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China.
| | - Dali Luo
- Department of Pharmacology, School of Basic Medical Sciences, Beijing Key Laboratory of Metabolic Disturbance Related Cardiovascular Disease, Capital Medical University, Beijing, 100069, People's Republic of China.
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2
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Bongiovanni C, Bueno-Levy H, Posadas Pena D, Del Bono I, Miano C, Boriati S, Da Pra S, Sacchi F, Redaelli S, Bergen M, Romaniello D, Pontis F, Tassinari R, Kellerer L, Petraroia I, Mazzeschi M, Lauriola M, Ventura C, Heermann S, Weidinger G, Tzahor E, D'Uva G. BMP7 promotes cardiomyocyte regeneration in zebrafish and adult mice. Cell Rep 2024; 43:114162. [PMID: 38678558 DOI: 10.1016/j.celrep.2024.114162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 03/06/2024] [Accepted: 04/11/2024] [Indexed: 05/01/2024] Open
Abstract
Zebrafish have a lifelong cardiac regenerative ability after damage, whereas mammals lose this capacity during early postnatal development. This study investigated whether the declining expression of growth factors during postnatal mammalian development contributes to the decrease of cardiomyocyte regenerative potential. Besides confirming the proliferative ability of neuregulin 1 (NRG1), interleukin (IL)1b, receptor activator of nuclear factor kappa-Β ligand (RANKL), insulin growth factor (IGF)2, and IL6, we identified other potential pro-regenerative factors, with BMP7 exhibiting the most pronounced efficacy. Bmp7 knockdown in neonatal mouse cardiomyocytes and loss-of-function in adult zebrafish during cardiac regeneration reduced cardiomyocyte proliferation, indicating that Bmp7 is crucial in the regenerative stages of mouse and zebrafish hearts. Conversely, bmp7 overexpression in regenerating zebrafish or administration at post-mitotic juvenile and adult mouse stages, in vitro and in vivo following myocardial infarction, enhanced cardiomyocyte cycling. Mechanistically, BMP7 stimulated proliferation through BMPR1A/ACVR1 and ACVR2A/BMPR2 receptors and downstream SMAD5, ERK, and AKT signaling. Overall, BMP7 administration is a promising strategy for heart regeneration.
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Affiliation(s)
- Chiara Bongiovanni
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Hanna Bueno-Levy
- Department of Molecular Cell Biology, Weizmann Institute of Science, Herzl St. 234, Rehovot 76100, Israel
| | - Denise Posadas Pena
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Irene Del Bono
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Carmen Miano
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Stefano Boriati
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Silvia Da Pra
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Francesca Sacchi
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Simone Redaelli
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Max Bergen
- Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Albertstrasse 17, 79104 Freiburg, Germany
| | - Donatella Romaniello
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Francesca Pontis
- Scientific and Technological Pole, IRCCS MultiMedica, via Fantoli 16/15, 20138 Milan, Italy
| | | | - Laura Kellerer
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Ilaria Petraroia
- Scientific and Technological Pole, IRCCS MultiMedica, via Fantoli 16/15, 20138 Milan, Italy
| | - Martina Mazzeschi
- IRCCS Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Mattia Lauriola
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; Centre for Applied Biomedical Research (CRBA), University of Bologna, via Massarenti 9, 40138 Bologna, Italy
| | - Carlo Ventura
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; National Laboratory of Molecular Biology and Stem Cell Engineering, National Institute of Biostructures and Biosystems (INBB), via di Corticella 183, 40128 Bologna, Italy
| | - Stephan Heermann
- Institute of Anatomy and Cell Biology, Faculty of Medicine, University of Freiburg, Albertstrasse 17, 79104 Freiburg, Germany
| | - Gilbert Weidinger
- Institute of Biochemistry and Molecular Biology, Ulm University, Albert-Einstein-Allee 11, 89081 Ulm, Germany
| | - Eldad Tzahor
- Department of Molecular Cell Biology, Weizmann Institute of Science, Herzl St. 234, Rehovot 76100, Israel
| | - Gabriele D'Uva
- Department of Medical and Surgical Sciences, University of Bologna, via Massarenti 9, 40138 Bologna, Italy; IRCCS Azienda Ospedaliero-Universitaria di Bologna, via Massarenti 9, 40138 Bologna, Italy.
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3
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Ogawa A, Ohira S, Kato Y, Ikuta T, Yanagida S, Mi X, Ishii Y, Kanda Y, Nishida M, Inoue A, Wei FY. Activation of the urotensin-II receptor by remdesivir induces cardiomyocyte dysfunction. Commun Biol 2023; 6:511. [PMID: 37173432 PMCID: PMC10175918 DOI: 10.1038/s42003-023-04888-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 04/28/2023] [Indexed: 05/15/2023] Open
Abstract
Remdesivir is an antiviral drug used for COVID-19 treatment worldwide. Cardiovascular side effects have been associated with remdesivir; however, the underlying molecular mechanism remains unknown. Here, we performed a large-scale G-protein-coupled receptor screening in combination with structural modeling and found that remdesivir is a selective, partial agonist for urotensin-II receptor (UTS2R) through the Gαi/o-dependent AKT/ERK axis. Functionally, remdesivir treatment induced prolonged field potential and APD90 in human induced pluripotent stem cell (iPS)-derived cardiomyocytes and impaired contractility in both neonatal and adult cardiomyocytes, all of which mirror the clinical pathology. Importantly, remdesivir-mediated cardiac malfunctions were effectively attenuated by antagonizing UTS2R signaling. Finally, we characterized the effect of 110 single-nucleotide variants in UTS2R gene reported in genome database and found four missense variants that show gain-of-function effects in the receptor sensitivity to remdesivir. Collectively, our study illuminates a previously unknown mechanism underlying remdesivir-related cardiovascular events and that genetic variations of UTS2R gene can be a potential risk factor for cardiovascular events during remdesivir treatment, which collectively paves the way for a therapeutic opportunity to prevent such events in the future.
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Affiliation(s)
- Akiko Ogawa
- Department of Modomics Biology and Medicine, Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Miyagi, 980-8575, Japan
| | - Seiya Ohira
- Department of Modomics Biology and Medicine, Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Miyagi, 980-8575, Japan
- Graduate School of Medicine, Tohoku University, Sendai, Miyagi, 980-8575, Japan
| | - Yuri Kato
- Department of Physiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Tatsuya Ikuta
- Laboratory of Molecular & Cellular Biochemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan
| | - Shota Yanagida
- Division of Pharmacology, National Institute of Health Sciences, Kanagawa, 210-9501, Japan
- Division of Pharmaceutical Sciences, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8530, Japan
| | - Xinya Mi
- Department of Physiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yukina Ishii
- Department of Physiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan
| | - Yasunari Kanda
- Division of Pharmacology, National Institute of Health Sciences, Kanagawa, 210-9501, Japan
| | - Motohiro Nishida
- Department of Physiology, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.
- National Institute for Physiological Sciences and Exploratory Research Center on Life and Living Systems, National Institutes of Natural Sciences, Okazaki, 444-8787, Japan.
| | - Asuka Inoue
- Laboratory of Molecular & Cellular Biochemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3, Aoba, Aramaki, Aoba-ku, Sendai, Miyagi, 980-8578, Japan.
| | - Fan-Yan Wei
- Department of Modomics Biology and Medicine, Institute of Development, Aging and Cancer (IDAC), Tohoku University, Sendai, Miyagi, 980-8575, Japan.
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4
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Watanabe H, Tao G, Gan P, Westbury BC, Cox KD, Tjen K, Song R, Fishman GI, Makita T, Sucov HM. Purkinje Cardiomyocytes of the Adult Ventricular Conduction System Are Highly Diploid but Not Uniquely Regenerative. J Cardiovasc Dev Dis 2023; 10:jcdd10040161. [PMID: 37103040 PMCID: PMC10140853 DOI: 10.3390/jcdd10040161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/31/2023] [Accepted: 04/05/2023] [Indexed: 04/28/2023] Open
Abstract
Adult hearts are characterized by inefficient regeneration after injury, thus, the features that support or prevent cardiomyocyte (CM) proliferation are important to clarify. Diploid CMs are a candidate cell type that may have unique proliferative and regenerative competence, but no molecular markers are yet known that selectively identify all or subpopulations of diploid CMs. Here, using the conduction system expression marker Cntn2-GFP and the conduction system lineage marker Etv1CreERT2, we demonstrate that Purkinje CMs that comprise the adult ventricular conduction system are disproportionately diploid (33%, vs. 4% of bulk ventricular CMs). These, however, represent only a small proportion (3%) of the total diploid CM population. Using EdU incorporation during the first postnatal week, we demonstrate that bulk diploid CMs found in the later heart enter and complete the cell cycle during the neonatal period. In contrast, a significant fraction of conduction CMs persist as diploid cells from fetal life and avoid neonatal cell cycle activity. Despite their high degree of diploidy, the Purkinje lineage had no enhanced competence to support regeneration after adult heart infarction.
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Affiliation(s)
- Hirofumi Watanabe
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Ge Tao
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Peiheng Gan
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Baylee C Westbury
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kristie D Cox
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kelsey Tjen
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Ruolan Song
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Glenn I Fishman
- Leon H. Charney Division of Cardiology, New York University Grossman School of Medicine, New York, NY 10016, USA
| | - Takako Makita
- Darby Children's Research Institute, Department of Pediatrics, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Henry M Sucov
- Department of Regenerative Medicine and Cell Biology, Medical University of South Carolina, Charleston, SC 29425, USA
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC 29425, USA
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5
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Echinochrome Prevents Sulfide Catabolism-Associated Chronic Heart Failure after Myocardial Infarction in Mice. Mar Drugs 2023; 21:md21010052. [PMID: 36662225 PMCID: PMC9863521 DOI: 10.3390/md21010052] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 01/15/2023] Open
Abstract
Abnormal sulfide catabolism, especially the accumulation of hydrogen sulfide (H2S) during hypoxic or inflammatory stresses, is a major cause of redox imbalance-associated cardiac dysfunction. Polyhydroxynaphtoquinone echinochrome A (Ech-A), a natural pigment of marine origin found in the shells and needles of many species of sea urchins, is a potent antioxidant and inhibits acute myocardial ferroptosis after ischemia/reperfusion, but the chronic effect of Ech-A on heart failure is unknown. Reactive sulfur species (RSS), which include catenated sulfur atoms, have been revealed as true biomolecules with high redox reactivity required for intracellular energy metabolism and signal transduction. Here, we report that continuous intraperitoneal administration of Ech-A (2.0 mg/kg/day) prevents RSS catabolism-associated chronic heart failure after myocardial infarction (MI) in mice. Ech-A prevented left ventricular (LV) systolic dysfunction and structural remodeling after MI. Fluorescence imaging revealed that intracellular RSS level was reduced after MI, while H2S/HS- level was increased in LV myocardium, which was attenuated by Ech-A. This result indicates that Ech-A suppresses RSS catabolism to H2S/HS- in LV myocardium after MI. In addition, Ech-A reduced oxidative stress formation by MI. Ech-A suppressed RSS catabolism caused by hypoxia in neonatal rat cardiomyocytes and human iPS cell-derived cardiomyocytes. Ech-A also suppressed RSS catabolism caused by lipopolysaccharide stimulation in macrophages. Thus, Ech-A has the potential to improve chronic heart failure after MI, in part by preventing sulfide catabolism.
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6
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Sturgill SL, Salyer LG, Biesiadecki BJ, Ziolo MT. A Simple and Effective Method to Consistently Isolate Mouse Cardiomyocytes. J Vis Exp 2022:10.3791/63056. [PMID: 36440883 PMCID: PMC11000524 DOI: 10.3791/63056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The need for reproducible yet technically simple methods yielding high-quality cardiomyocytes is essential for research in cardiac biology. Cellular and molecular functional experiments (e.g., contraction, electrophysiology, calcium cycling, etc.) on cardiomyocytes are the gold standard for establishing mechanism(s) of disease. The mouse is the species of choice for functional experiments and the described technique is specifically for the isolation of mouse cardiomyocytes. Previous methods requiring a Langendorff apparatus require high levels of training and precision for aortic cannulation, often resulting in ischemia. The field is shifting toward Langendorff-free isolation methods that are simple, are reproducible, and yield viable myocytes for physiological data acquisition and culture. These methods greatly diminish ischemia time compared to aortic cannulation and result in reliably obtained cardiomyocytes. Our adaptation to the Langendorff-free method includes an initial perfusion with ice-cold clearing solution, use of a stabilizing platform that ensures a steady needle during perfusion, and additional digestion steps to ensure reliably obtained cardiomyocytes for use in functional measurements and culture. This method is simple and quick to perform and requires little technical skill.
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Affiliation(s)
- Sarah L Sturgill
- Department of Physiology and Cell Biology, The Ohio State University
| | - Lorien G Salyer
- Department of Physiology and Cell Biology, The Ohio State University
| | | | - Mark T Ziolo
- Department of Physiology and Cell Biology, The Ohio State University;
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7
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Oda S, Nishiyama K, Furumoto Y, Yamaguchi Y, Nishimura A, Tang X, Kato Y, Numaga-Tomita T, Kaneko T, Mangmool S, Kuroda T, Okubo R, Sanbo M, Hirabayashi M, Sato Y, Nakagawa Y, Kuwahara K, Nagata R, Iribe G, Mori Y, Nishida M. Myocardial TRPC6-mediated Zn 2+ influx induces beneficial positive inotropy through β-adrenoceptors. Nat Commun 2022; 13:6374. [PMID: 36289215 PMCID: PMC9606288 DOI: 10.1038/s41467-022-34194-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Accepted: 10/12/2022] [Indexed: 12/25/2022] Open
Abstract
Baroreflex control of cardiac contraction (positive inotropy) through sympathetic nerve activation is important for cardiocirculatory homeostasis. Transient receptor potential canonical subfamily (TRPC) channels are responsible for α1-adrenoceptor (α1AR)-stimulated cation entry and their upregulation is associated with pathological cardiac remodeling. Whether TRPC channels participate in physiological pump functions remains unclear. We demonstrate that TRPC6-specific Zn2+ influx potentiates β-adrenoceptor (βAR)-stimulated positive inotropy in rodent cardiomyocytes. Deletion of trpc6 impairs sympathetic nerve-activated positive inotropy but not chronotropy in mice. TRPC6-mediated Zn2+ influx boosts α1AR-stimulated βAR/Gs-dependent signaling in rat cardiomyocytes by inhibiting β-arrestin-mediated βAR internalization. Replacing two TRPC6-specific amino acids in the pore region with TRPC3 residues diminishes the α1AR-stimulated Zn2+ influx and positive inotropic response. Pharmacological enhancement of TRPC6-mediated Zn2+ influx prevents chronic heart failure progression in mice. Our data demonstrate that TRPC6-mediated Zn2+ influx with α1AR stimulation enhances baroreflex-induced positive inotropy, which may be a new therapeutic strategy for chronic heart failure.
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Affiliation(s)
- Sayaka Oda
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.250358.90000 0000 9137 6732Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.275033.00000 0004 1763 208XDepartment of Physiological Sciences, SOKENDAI (School of Life Science, The Graduate University for Advanced Studies), Aichi, 444-8787 Japan
| | - Kazuhiro Nishiyama
- grid.177174.30000 0001 2242 4849Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582 Japan
| | - Yuka Furumoto
- grid.177174.30000 0001 2242 4849Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582 Japan
| | - Yohei Yamaguchi
- grid.252427.40000 0000 8638 2724Asahikawa Medical University, Hokkaido, 078-8510 Japan
| | - Akiyuki Nishimura
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.250358.90000 0000 9137 6732Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.275033.00000 0004 1763 208XDepartment of Physiological Sciences, SOKENDAI (School of Life Science, The Graduate University for Advanced Studies), Aichi, 444-8787 Japan
| | - Xiaokang Tang
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.250358.90000 0000 9137 6732Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.275033.00000 0004 1763 208XDepartment of Physiological Sciences, SOKENDAI (School of Life Science, The Graduate University for Advanced Studies), Aichi, 444-8787 Japan
| | - Yuri Kato
- grid.177174.30000 0001 2242 4849Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582 Japan
| | - Takuro Numaga-Tomita
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.250358.90000 0000 9137 6732Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.263518.b0000 0001 1507 4692Shinshu University School of Medicine, Matsumoto, 390-8621 Japan
| | - Toshiyuki Kaneko
- grid.252427.40000 0000 8638 2724Asahikawa Medical University, Hokkaido, 078-8510 Japan
| | - Supachoke Mangmool
- grid.10223.320000 0004 1937 0490Faculty of Science, Mahidol University, Bangkok, 10400 Thailand
| | - Takuya Kuroda
- grid.410797.c0000 0001 2227 8773National Institute of Health Sciences, Kanagawa, 210-9501 Japan
| | - Reishin Okubo
- grid.177174.30000 0001 2242 4849Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582 Japan
| | - Makoto Sanbo
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan
| | - Masumi Hirabayashi
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan
| | - Yoji Sato
- grid.410797.c0000 0001 2227 8773National Institute of Health Sciences, Kanagawa, 210-9501 Japan
| | - Yasuaki Nakagawa
- grid.258799.80000 0004 0372 2033Kyoto University Graduate School of Medicine, Kyoto, 606-8507 Japan
| | - Koichiro Kuwahara
- grid.263518.b0000 0001 1507 4692Shinshu University School of Medicine, Matsumoto, 390-8621 Japan
| | - Ryu Nagata
- grid.136593.b0000 0004 0373 3971Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, 565-0871 Japan
| | - Gentaro Iribe
- grid.252427.40000 0000 8638 2724Asahikawa Medical University, Hokkaido, 078-8510 Japan
| | - Yasuo Mori
- grid.258799.80000 0004 0372 2033Graduate School of Engineering, Kyoto University, Kyoto, 615-8510 Japan
| | - Motohiro Nishida
- grid.250358.90000 0000 9137 6732National Institute for Physiological Sciences (NIPS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.250358.90000 0000 9137 6732Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, 444-8787 Japan ,grid.275033.00000 0004 1763 208XDepartment of Physiological Sciences, SOKENDAI (School of Life Science, The Graduate University for Advanced Studies), Aichi, 444-8787 Japan ,grid.177174.30000 0001 2242 4849Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka, 812-8582 Japan
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8
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Omatsu-Kanbe M, Fukunaga R, Mi X, Matsuura H. Atypically Shaped Cardiomyocytes (ACMs): The Identification, Characterization and New Insights into a Subpopulation of Cardiomyocytes. Biomolecules 2022; 12:biom12070896. [PMID: 35883452 PMCID: PMC9313223 DOI: 10.3390/biom12070896] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Revised: 06/17/2022] [Accepted: 06/24/2022] [Indexed: 02/01/2023] Open
Abstract
In the adult mammalian heart, no data have yet shown the existence of cardiomyocyte-differentiable stem cells that can be used to practically repair the injured myocardium. Atypically shaped cardiomyocytes (ACMs) are found in cultures of the cardiomyocyte-removed fraction obtained from cardiac ventricles from neonatal to aged mice. ACMs are thought to be a subpopulation of cardiomyocytes or immature cardiomyocytes, most closely resembling cardiomyocytes due to their spontaneous beating, well-organized sarcomere and the expression of cardiac-specific proteins, including some fetal cardiac gene proteins. In this review, we focus on the characteristics of ACMs compared with ventricular myocytes and discuss whether these cells can be substitutes for damaged cardiomyocytes. ACMs reside in the interstitial spaces among ventricular myocytes and survive under severely hypoxic conditions fatal to ventricular myocytes. ACMs have not been observed to divide or proliferate, similar to cardiomyocytes, but they maintain their ability to fuse with each other. Thus, it is worthwhile to understand the role of ACMs and especially how these cells perform cell fusion or function independently in vivo. It may aid in the development of new approaches to cell therapy to protect the injured heart or the clarification of the pathogenesis underlying arrhythmia in the injured heart.
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9
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Kawagishi H, Nakada T, Numaga-Tomita T, Larrañaga M, Guo A, Song LS, Yamada M. Cytokine receptor gp130 promotes postnatal proliferation of cardiomyocytes required for the normal functional development of the heart. Am J Physiol Heart Circ Physiol 2022; 323:H103-H120. [PMID: 35594067 DOI: 10.1152/ajpheart.00698.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mammalian ventricular cardiomyocytes are premature at birth and exhibit substantial phenotypic changes before weaning. Mouse ventricular myocytes undergo cell division several times after birth; however, the regulatory mechanisms and roles of cardiomyocyte division in postnatal heart development remain unclear. Here, we investigated the physiological role of gp130, the main subunit of multifunctional receptors for the IL-6 family of cytokines, in postnatal cardiomyocyte proliferation. Pharmacological inhibition of gp130 within the first month after birth induced significant systolic dysfunction of the left ventricle in mice. Consistently, mice with postnatal cardiomyocyte-specific gp130 depletion exhibited impaired left ventricular contractility compared to control mice. In these mice, cardiomyocytes exhibited a moderately decreased size and dramatically inhibited proliferation in the left ventricle but not in the right ventricle. Stereological analysis revealed that this change significantly decreased the number of cardiomyocytes in the left ventricle. Furthermore, IL-6 was mainly responsible for promoting ventricular cardiomyocyte proliferation by activating the JAK/STAT3 pathway. Taken together, the IL-6/gp130/JAK/STAT3 axis plays a crucial role in the physiological postnatal proliferation and hypertrophy of left ventricular cardiomyocytes to ensure normal cardiac functional development.
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Affiliation(s)
- Hiroyuki Kawagishi
- Department of Biotechnology, Institute for Biomedical Sciences, Shinshu University, Nagano, Japan.,Department of Molecular Pharmacology, Shinshu University School of Medicine, Nagano, Japan
| | - Tsutomu Nakada
- Department of Instrumental Analysis, Research Center for Supports to Advanced Science, Shinshu University, Nagano, Japan
| | - Takuro Numaga-Tomita
- Department of Molecular Pharmacology, Shinshu University School of Medicine, Nagano, Japan
| | - Maite Larrañaga
- Basic Sciences Department, Faculty of Medicine and Health Sciences, Universitat Internacional de Catalunya, Catalunya, Spain
| | - Ang Guo
- Department of Pharmaceutical Sciences, North Dakota State University, Fargo, North Dakota, United States
| | - Long-Sheng Song
- Division of Cardiovascular Medicine, Department of Internal Medicine and François M. Abboud Cardiovascular Research Center, University of Iowa Carver College of Medicine,Iowa City, Iowa, United States
| | - Mitsuhiko Yamada
- Department of Molecular Pharmacology, Shinshu University School of Medicine, Nagano, Japan
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10
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Ravizzoni Dartora D, Flahault A, Pontes CNR, He Y, Deprez A, Cloutier A, Cagnone G, Gaub P, Altit G, Bigras JL, Joyal JS, Mai Luu T, Burelle Y, Nuyt AM. Cardiac Left Ventricle Mitochondrial Dysfunction After Neonatal Exposure to Hyperoxia: Relevance for Cardiomyopathy After Preterm Birth. Hypertension 2021; 79:575-587. [PMID: 34961326 PMCID: PMC8823906 DOI: 10.1161/hypertensionaha.121.17979] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Supplemental Digital Content is available in the text. Individuals born preterm present left ventricle changes and increased risk of cardiac diseases and heart failure. The pathophysiology of heart disease after preterm birth is incompletely understood. Mitochondria dysfunction is a hallmark of cardiomyopathy resulting in heart failure. We hypothesized that neonatal hyperoxia in rats, a recognized model simulating preterm birth conditions and resulting in oxygen-induced cardiomyopathy, induce left ventricle mitochondrial changes in juvenile rats. We also hypothesized that humanin, a mitochondrial-derived peptide, would be reduced in young adults born preterm.
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Affiliation(s)
- Daniela Ravizzoni Dartora
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Adrien Flahault
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Carolina N R Pontes
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.).,Department of Physiology and Pharmacology, Universidade Federal de Goias, Brazil (C.N.R.P.)
| | - Ying He
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Alyson Deprez
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Anik Cloutier
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Gaël Cagnone
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.).,Department of Physiology and Pharmacology, Faculty of Medicine, University of Montreal, Quebec, Canada. (G.C., P.G., J.-S.J.)
| | - Perrine Gaub
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.).,Department of Physiology and Pharmacology, Faculty of Medicine, University of Montreal, Quebec, Canada. (G.C., P.G., J.-S.J.)
| | - Gabriel Altit
- Division of Neonatology, Department of Pediatrics, Montreal Children's Hospital, McGill University, Montreal, Quebec, Canada (G.A.)
| | - Jean-Luc Bigras
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Jean-Sébastien Joyal
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.).,Department of Physiology and Pharmacology, Faculty of Medicine, University of Montreal, Quebec, Canada. (G.C., P.G., J.-S.J.)
| | - Thuy Mai Luu
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
| | - Yan Burelle
- Department of Cellular and Molecular Medicine, University of Ottawa, Canada (Y.B.)
| | - Anne Monique Nuyt
- Department of Pediatrics, Sainte-Justine University Hospital (CHU Sainte-Justine) and Research Centre, Faculty of Medicine, University of Montreal, Quebec, Canada. (D.R.D., A.F., C.N.R.P., Y.H., A.D., A.C., G.C., P.G., J.-L.B., J.-S.J., T.M.L., A.M.N.)
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11
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A combined Langendorff-injection technique for simultaneous isolation of single cardiomyocytes from atria and ventricles of the rat heart. MethodsX 2020; 8:101189. [PMID: 33376680 PMCID: PMC7758550 DOI: 10.1016/j.mex.2020.101189] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 12/15/2020] [Indexed: 12/25/2022] Open
Abstract
Single cardiomyocytes are widely used for investigations of the cellular and molecular mechanisms of regulation and modulation of cardiac performance. Intact cardiomyocytes allow one to study in detail cell function avoiding the effects of extracellular matrix and neighboring cells. The most established protocols of cardiomyocyte isolation are based on the isolated heart perfusion using a Langendorff-apparatus or on intraventricular perfusion using a syringe. However, the yield of single cardiomyocytes obtained by these methods may be low due to the cell injury following non-uniform enzyme digestion of connective tissue in different heart chambers. Moreover, isolation of atrial cardiomyocytes is challenging because of their small size and complex geometric shape. Here we present a new protocol for simultaneous isolation of high quality cardiomyocytes from the atria, ventricular free walls and interventricular septum. The protocol is based on the combination of the Langendorff perfusion method with the intraventricular and intra-atrial injection technique taking into account the collagen content variation between the different heart chambers. Obtained cells demonstrate rod-shaped morphology, a clear and regular sarcomere striation pattern and rat-specific frequency-dependence of contraction and calcium transient parameters. Our protocol provides gentle cell isolation that increases the yield of single cardiomyocytes suitable for biophysical researches .
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12
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McNally LA, Altamimi TR, Fulghum K, Hill BG. Considerations for using isolated cell systems to understand cardiac metabolism and biology. J Mol Cell Cardiol 2020; 153:26-41. [PMID: 33359038 DOI: 10.1016/j.yjmcc.2020.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 12/13/2020] [Accepted: 12/16/2020] [Indexed: 12/11/2022]
Abstract
Changes in myocardial metabolic activity are fundamentally linked to cardiac health and remodeling. Primary cardiomyocytes, induced pluripotent stem cell-derived cardiomyocytes, and transformed cardiomyocyte cell lines are common models used to understand how (patho)physiological conditions or stimuli contribute to changes in cardiac metabolism. These cell models are helpful also for defining metabolic mechanisms of cardiac dysfunction and remodeling. Although technical advances have improved our capacity to measure cardiomyocyte metabolism, there is often heterogeneity in metabolic assay protocols and cell models, which could hinder data interpretation and discernment of the mechanisms of cardiac (patho)physiology. In this review, we discuss considerations for integrating cardiomyocyte cell models with techniques that have become relatively common in the field, such as respirometry and extracellular flux analysis. Furthermore, we provide overviews of metabolic assays that complement XF analyses and that provide information on not only catabolic pathway activity, but biosynthetic pathway activity and redox status as well. Cultivating a more widespread understanding of the advantages and limitations of metabolic measurements in cardiomyocyte cell models will continue to be essential for the development of coherent metabolic mechanisms of cardiac health and pathophysiology.
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Affiliation(s)
- Lindsey A McNally
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, KY, USA
| | - Tariq R Altamimi
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, KY, USA
| | - Kyle Fulghum
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, KY, USA
| | - Bradford G Hill
- Department of Medicine, Division of Environmental Medicine, Christina Lee Brown Envirome Institute, Diabetes and Obesity Center, University of Louisville, Louisville, KY, USA.
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13
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Blackwood EA, Bilal AS, Azizi K, Sarakki A, Glembotski CC. Simultaneous Isolation and Culture of Atrial Myocytes, Ventricular Myocytes, and Non-Myocytes from an Adult Mouse Heart. J Vis Exp 2020:10.3791/61224. [PMID: 32597844 PMCID: PMC8580476 DOI: 10.3791/61224] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
The isolation and culturing of cardiac myocytes from mice has been essential for furthering the understanding of cardiac physiology and pathophysiology. While isolating myocytes from neonatal mouse hearts is relatively straightforward, myocytes from the adult murine heart are preferred. This is because compared to neonatal cells, adult myocytes more accurately recapitulate cell function as it occurs in the adult heart in vivo. However, it is technically difficult to isolate adult mouse cardiac myocytes in the necessary quantities and viability, which contributes to an experimental impasse. Furthermore, published procedures are specific for the isolation of either atrial or ventricular myocytes at the expense of atrial and ventricular non-myocyte cells. Described here is a detailed method for isolating both atrial and ventricular cardiac myocytes, along with atrial and ventricular non-myocytes, simultaneously from a single mouse heart. Also provided are the details for optimal cell-specific culturing methods, which enhance cell viability and function. This protocol aims not only to expedite the process of adult murine cardiac cell isolation, but also to increase the yield and viability of cells for investigations of atrial and ventricular cardiac cells.
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Affiliation(s)
- Erik A Blackwood
- San Diego State University Heart Institute and the Department of Biology, San Diego State University
| | - Alina S Bilal
- San Diego State University Heart Institute and the Department of Biology, San Diego State University
| | - Khalid Azizi
- San Diego State University Heart Institute and the Department of Biology, San Diego State University
| | - Anup Sarakki
- San Diego State University Heart Institute and the Department of Biology, San Diego State University
| | - Christopher C Glembotski
- San Diego State University Heart Institute and the Department of Biology, San Diego State University;
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14
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Shimizu A, Zankov DP, Sato A, Komeno M, Toyoda F, Yamazaki S, Makita T, Noda T, Ikawa M, Asano Y, Miyashita Y, Takashima S, Morita H, Ishikawa T, Makita N, Hitosugi M, Matsuura H, Ohno S, Horie M, Ogita H. Identification of transmembrane protein 168 mutation in familial Brugada syndrome. FASEB J 2020; 34:6399-6417. [PMID: 32175648 DOI: 10.1096/fj.201902991r] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 02/19/2020] [Accepted: 03/02/2020] [Indexed: 12/30/2022]
Abstract
Brugada syndrome (BrS) is an inherited channelopathy responsible for almost 20% of sudden cardiac deaths in patients with nonstructural cardiac diseases. Approximately 70% of BrS patients, the causative gene mutation(s) remains unknown. In this study, we used whole exome sequencing to investigate candidate mutations in a family clinically diagnosed with BrS. A heterozygous 1616G>A substitution (R539Q mutation) was identified in the transmembrane protein 168 (TMEM168) gene of symptomatic individuals. Similar to endogenous TMEM168, both TMEM168 wild-type (WT) and mutant proteins that were ectopically induced in HL-1 cells showed nuclear membrane localization. A significant decrease in Na+ current and Nav 1.5 protein expression was observed in HL-1 cardiomyocytes expressing mutant TMEM168. Ventricular tachyarrhythmias and conduction disorders were induced in the heterozygous Tmem168 1616G>A knock-in mice by pharmacological stimulation, but not in WT mice. Na+ current was reduced in ventricular cardiomyocytes isolated from the Tmem168 knock-in heart, and Nav 1.5 expression was also impaired. This impairment was dependent on increased Nedd4-2 binding to Nav 1.5 and subsequent ubiquitination. Collectively, our results show an association between the TMEM168 1616G>A mutation and arrhythmogenesis in a family with BrS.
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Affiliation(s)
- Akio Shimizu
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Dimitar P Zankov
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan.,Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Akira Sato
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Masahiro Komeno
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
| | - Futoshi Toyoda
- Division of Cell Physiology, Department of Physiology, Shiga University of Medical Science, Otsu, Japan
| | - Satoru Yamazaki
- Department of Molecular Pharmacology, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Toshinori Makita
- Division of Cardiac Electrophysiology, Department of Cardiovascular Center, Osaka Red Cross Hospital, Osaka, Japan
| | - Taichi Noda
- Animal Resource Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Masahito Ikawa
- Animal Resource Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Yoshihiro Asano
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Yohei Miyashita
- Department of Legal Medicine, Osaka University Graduate School of Medicine, Suita, Japan
| | - Seiji Takashima
- Department of Medical Biochemistry, Osaka University Graduate School of Medicine, Suita, Japan
| | - Hiroshi Morita
- Department of Cardiovascular Therapeutics, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Taisuke Ishikawa
- Omics Research Center, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Naomasa Makita
- Omics Research Center, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Masahito Hitosugi
- Department of Legal Medicine, Shiga University of Medical Science, Otsu, Japan
| | - Hiroshi Matsuura
- Division of Cell Physiology, Department of Physiology, Shiga University of Medical Science, Otsu, Japan
| | - Seiko Ohno
- Department of Bioscience and Genetics, National Cerebral and Cardiovascular Center, Suita, Japan.,Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Otsu, Japan
| | - Minoru Horie
- Center for Epidemiologic Research in Asia, Shiga University of Medical Science, Otsu, Japan
| | - Hisakazu Ogita
- Division of Molecular Medical Biochemistry, Department of Biochemistry and Molecular Biology, Shiga University of Medical Science, Otsu, Japan
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