1
|
Chiew MY, Wang E, Lan KC, Lin YR, Hsueh YH, Tu YK, Liu CF, Chen PC, Lu HE, Chen WL. Improving iPSC Differentiation Using a Nanodot Platform. ACS APPLIED MATERIALS & INTERFACES 2024. [PMID: 38951110 DOI: 10.1021/acsami.4c04451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/03/2024]
Abstract
Differentiation of induced pluripotent stem cells (iPSCs) is an extremely complex process that has proven difficult to study. In this research, we utilized nanotopography to elucidate details regarding iPSC differentiation by developing a nanodot platform consisting of nanodot arrays of increasing diameter. Subjecting iPSCs cultured on the nanodot platform to a cardiomyocyte (CM) differentiation protocol revealed several significant gene expression profiles that were associated with poor differentiation. The observed expression trends were used to select existing small-molecule drugs capable of modulating differentiation efficiency. BRD K98 was repurposed to inhibit CM differentiation, while iPSCs treated with NSC-663284, carmofur, and KPT-330 all exhibited significant increases in not only CM marker expression but also spontaneous beating, suggesting improved CM differentiation. In addition, quantitative polymerase chain reaction was performed to determine the gene regulation responsible for modulating differentiation efficiency. Multiple genes involved in extracellular matrix remodeling were correlated with a CM differentiation efficiency, while genes involved in the cell cycle exhibited contrasting expression trends that warrant further studies. The results suggest that expression profiles determined via short time-series expression miner analysis of nanodot-cultured iPSC differentiation can not only reveal drugs capable of enhancing differentiation efficiency but also highlight crucial sets of genes related to processes such as extracellular matrix remodeling and the cell cycle that can be targeted for further investigation. Our findings confirm that the nanodot platform can be used to reveal complex mechanisms behind iPSC differentiation and could be an indispensable tool for optimizing iPSC technology for clinical applications.
Collapse
Affiliation(s)
- Men Yee Chiew
- Center for Regenerative Medicine and Cellular Therapy, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan, ROC
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
| | - Erick Wang
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
- College of Biological Science and Technology Industrial Ph. D. Program, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
| | - Kuan-Chun Lan
- Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto 606-8397, Japan
| | - Yan-Ren Lin
- Department of Emergency and Critical Care Medicine, Changhua Christian Hospital, Changhua 500, Taiwan, ROC
- Department of Post Baccalaureate Medicine, College of Medicine, National Chung Hsing University, Taichung 402, Taiwan, ROC
- School of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan, ROC
- School of Medicine, Chung Shan Medical University, Taichung 402, Taiwan, ROC
| | - Yu-Huan Hsueh
- College of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
- Department of Orthopedic Surgery, E-Da Hospital, I-Shou University, Kaohsiung 824, Taiwan
| | - Yuan-Kun Tu
- Department of Orthopedic Surgery, E-Da Hospital, I-Shou University, Kaohsiung 824, Taiwan
| | - Chu-Feng Liu
- Emergency Medicine Department, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, 833, Taiwan, ROC
- Ph. D. Degree Program of Biomedical Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
| | - Po-Chun Chen
- Institute of Materials Science and Engineering, National Taipei University of Technology, Taipei 106, Taiwan, ROC
| | - Huai-En Lu
- Center for Regenerative Medicine and Cellular Therapy, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan, ROC
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu City 300, Taiwan, ROC
| | - Wen Liang Chen
- Center for Regenerative Medicine and Cellular Therapy, National Yang Ming Chiao Tung University, Hsinchu, 300, Taiwan, ROC
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
- College of Biological Science and Technology Industrial Ph. D. Program, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan, ROC
- Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu City 300, Taiwan, ROC
| |
Collapse
|
2
|
Poulos MG, Ramalingam P, Winiarski A, Gutkin MC, Katsnelson L, Carter C, Pibouin-Fragner L, Eichmann A, Thomas JL, Miquerol L, Butler JM. Complementary and Inducible creER T2 Mouse Models for Functional Evaluation of Endothelial Cell Subtypes in the Bone Marrow. Stem Cell Rev Rep 2024; 20:1135-1149. [PMID: 38438768 PMCID: PMC11087254 DOI: 10.1007/s12015-024-10703-9] [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] [Accepted: 02/21/2024] [Indexed: 03/06/2024]
Abstract
In the adult bone marrow (BM), endothelial cells (ECs) are an integral component of the hematopoietic stem cell (HSC)-supportive niche, which modulates HSC activity by producing secreted and membrane-bound paracrine signals. Within the BM, distinct vascular arteriole, transitional, and sinusoidal EC subtypes display unique paracrine expression profiles and create anatomically-discrete microenvironments. However, the relative contributions of vascular endothelial subtypes in supporting hematopoiesis is unclear. Moreover, constitutive expression and off-target activity of currently available endothelial-specific and endothelial-subtype-specific murine cre lines potentially confound data analysis and interpretation. To address this, we describe two tamoxifen-inducible cre-expressing lines, Vegfr3-creERT2 and Cx40-creERT2, that efficiently label sinusoidal/transitional and arteriole endothelium respectively in adult marrow, without off-target activity in hematopoietic or perivascular cells. Utilizing an established mouse model in which cre-dependent recombination constitutively-activates MAPK signaling within adult endothelium, we identify arteriole ECs as the driver of MAPK-mediated hematopoietic dysfunction. These results define complementary tamoxifen-inducible creERT2-expressing mouse lines that label functionally-discrete and non-overlapping sinusoidal/transitional and arteriole EC populations in the adult BM, providing a robust toolset to investigate the differential contributions of vascular subtypes in maintaining hematopoietic homeostasis.
Collapse
Affiliation(s)
- Michael G Poulos
- Department of Medicine, University of Florida Health Cancer Center, Gainesville, FL, 32610, USA
- Division of Hematology/Oncology, University of Florida, 1333 Center Drive, BH-022D, Gainesville, FL, 32610, USA
| | - Pradeep Ramalingam
- Department of Medicine, University of Florida Health Cancer Center, Gainesville, FL, 32610, USA
- Division of Hematology/Oncology, University of Florida, 1333 Center Drive, BH-022D, Gainesville, FL, 32610, USA
| | - Agatha Winiarski
- Department of Medicine, University of Florida Health Cancer Center, Gainesville, FL, 32610, USA
| | - Michael C Gutkin
- Ansary Stem Cell Institute, Division of Regenerative Medicine, Department of Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Lizabeth Katsnelson
- Ansary Stem Cell Institute, Division of Regenerative Medicine, Department of Medicine, Weill Cornell Medicine, New York, NY, 10065, USA
| | - Cody Carter
- Department of Medicine, University of Florida Health Cancer Center, Gainesville, FL, 32610, USA
| | | | - Anne Eichmann
- Université de Paris Cité, Inserm, PARCC, 75015, Paris, France
- Department of Molecular and Cellular Physiology, Yale University School of Medicine, New Haven, CT, 06510, USA
- Cardiovascular Research Center, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Jean-Leon Thomas
- Department of Neurology, Yale University School of Medicine, New Haven, CT, 06511, USA
- Paris Brain Institute, Université Pierre et Marie Curie Paris, 06 UMRS1127, Sorbonne Université, Paris Brain Institute, Paris, France
| | - Lucile Miquerol
- Aix-Marseille Université, CNRS UMR 7288, IBDM, 13288, Marseille, France
| | - Jason M Butler
- Department of Medicine, University of Florida Health Cancer Center, Gainesville, FL, 32610, USA.
- Ansary Stem Cell Institute, Division of Regenerative Medicine, Department of Medicine, Weill Cornell Medicine, New York, NY, 10065, USA.
- Division of Hematology/Oncology, University of Florida, 1333 Center Drive, BH-022D, Gainesville, FL, 32610, USA.
| |
Collapse
|
3
|
Lee C, Xu S, Samad T, Goodyer WR, Raissadati A, Heinrich P, Wu SM. The cardiac conduction system: History, development, and disease. Curr Top Dev Biol 2024; 156:157-200. [PMID: 38556422 DOI: 10.1016/bs.ctdb.2024.02.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
Abstract
The heart is the first organ to form during embryonic development, establishing the circulatory infrastructure necessary to sustain life and enable downstream organogenesis. Critical to the heart's function is its ability to initiate and propagate electrical impulses that allow for the coordinated contraction and relaxation of its chambers, and thus, the movement of blood and nutrients. Several specialized structures within the heart, collectively known as the cardiac conduction system (CCS), are responsible for this phenomenon. In this review, we discuss the discovery and scientific history of the mammalian cardiac conduction system as well as the key genes and transcription factors implicated in the formation of its major structures. We also describe known human diseases related to CCS development and explore existing challenges in the clinical context.
Collapse
Affiliation(s)
- Carissa Lee
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States
| | - Sidra Xu
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States
| | - Tahmina Samad
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States; Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States; Department of Pediatrics, Stanford University, Stanford, CA, United States
| | - William R Goodyer
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States; Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States
| | - Alireza Raissadati
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States; Division of Pediatric Cardiology, Department of Pediatrics, Stanford University School of Medicine, Stanford, CA, United States
| | - Paul Heinrich
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States; Regenerative Medicine in Cardiovascular Diseases, First Department of Medicine, Cardiology, Klinikum Rechts der Isar, Technical University of Munich, School of Medicine and Health, Munich, Germany
| | - Sean M Wu
- Stanford Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, United States; Institute for Stem Cell Biology and Regenerative Medicine, Stanford University, Stanford, CA, United States; Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, CA, United States.
| |
Collapse
|
4
|
van der Maarel LE, Christoffels VM. Development of the Cardiac Conduction System. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1441:185-200. [PMID: 38884712 DOI: 10.1007/978-3-031-44087-8_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
The electrical impulses that coordinate the sequential, rhythmic contractions of the atria and ventricles are initiated and tightly regulated by the specialized tissues of the cardiac conduction system. In the mature heart, these impulses are generated by the pacemaker cardiomyocytes of the sinoatrial node, propagated through the atria to the atrioventricular node where they are delayed and then rapidly propagated to the atrioventricular bundle, right and left bundle branches, and finally, the peripheral ventricular conduction system. Each of these specialized components arise by complex patterning events during embryonic development. This chapter addresses the origins and transcriptional networks and signaling pathways that drive the development and maintain the function of the cardiac conduction system.
Collapse
Affiliation(s)
- Lieve E van der Maarel
- Department of Medical Biology, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Vincent M Christoffels
- Department of Medical Biology, Amsterdam University Medical Center, University of Amsterdam, Amsterdam, The Netherlands.
| |
Collapse
|
5
|
Kanwischer L, Xu X, Saifuddin AB, Maamari S, Tan X, Alnour F, Tampe B, Meyer T, Zeisberg M, Hasenfuss G, Puls M, Zeisberg EM. Low levels of circulating methylated IRX3 are related to worse outcome after transcatheter aortic valve implantation in patients with severe aortic stenosis. Clin Epigenetics 2023; 15:149. [PMID: 37697352 PMCID: PMC10496273 DOI: 10.1186/s13148-023-01561-2] [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: 04/15/2023] [Accepted: 09/04/2023] [Indexed: 09/13/2023] Open
Abstract
BACKGROUND Aortic stenosis (AS) is one of the most common cardiac diseases and major cause of morbidity and mortality in the elderly. Transcatheter aortic valve implantation (TAVI) is performed in such patients with symptomatic severe AS and reduces mortality for the majority of these patients. However, a significant percentage dies within the first two years after TAVI, such that there is an interest to identify parameters, which predict outcome and could guide pre-TAVI patient selection. High levels of cardiac fibrosis have been identified as such independent predictor of cardiovascular mortality after TAVI. Promoter hypermethylation commonly leads to gene downregulation, and the Iroquois homeobox 3 (IRX3) gene was identified in a genome-wide transcriptome and methylome to be hypermethylated and downregulated in AS patients. In a well-described cohort of 100 TAVI patients in which cardiac fibrosis levels were quantified histologically in cardiac biopsies, and which had a follow-up of up to two years, we investigated if circulating methylated DNA of IRX3 in the peripheral blood is associated with cardiac fibrosis and/or mortality in AS patients undergoing TAVI and thus could serve as a biomarker to add information on outcome after TAVI. RESULTS Patients with high levels of methylation in circulating IRX3 show a significantly increased survival as compared to patients with low levels of IRX3 methylation indicating that high peripheral IRX3 methylation is associated with an improved outcome. In the multivariable setting, peripheral IRX3 methylation acts as an independent predictor of all-cause mortality. While there is no significant correlation of levels of IRX3 methylation with cardiac death, there is a significant but very weak inverse correlation between circulating IRX3 promoter methylation level and the amount of cardiac fibrosis. Higher levels of peripheral IRX3 methylation further correlated with decreased cardiac IRX3 expression and vice versa. CONCLUSIONS High levels of IRX3 methylation in the blood of AS patients at the time of TAVI are associated with better overall survival after TAVI and at least partially reflect myocardial IRX3 expression. Circulating methylated IRX3 might aid as a potential biomarker to help guide both pre-TAVI patient selection and post-TAVI monitoring.
Collapse
Affiliation(s)
- Leon Kanwischer
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Xingbo Xu
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Afifa Binta Saifuddin
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Sabine Maamari
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Xiaoying Tan
- Department of Nephrology and Rheumatology, University Medical Center Göttingen, Georg-August-University, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Fouzi Alnour
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Björn Tampe
- Department of Nephrology and Rheumatology, University Medical Center Göttingen, Georg-August-University, Göttingen, Germany
| | - Thomas Meyer
- Department of Psychosomatic Medicine and Psychotherapy, University Medical Center Göttingen, Georg-August-University, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Michael Zeisberg
- Department of Nephrology and Rheumatology, University Medical Center Göttingen, Georg-August-University, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Gerd Hasenfuss
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Miriam Puls
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany
| | - Elisabeth M Zeisberg
- Department of Cardiology and Pneumology, University Medical Center Göttingen, Georg-August-University, Robert-Koch-Str. 40, 37075, Göttingen, Germany.
- DZHK German Center for Cardiovascular Research, Partner Site Göttingen, Göttingen, Germany.
| |
Collapse
|
6
|
Kurtz SL, Rydén P, Elkins KL. Transcriptional signatures measured in whole blood correlate with protection against tuberculosis in inbred and outbred mice. PLoS One 2023; 18:e0289358. [PMID: 37535648 PMCID: PMC10399789 DOI: 10.1371/journal.pone.0289358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 07/17/2023] [Indexed: 08/05/2023] Open
Abstract
Although BCG has been used for almost 100 years to immunize against Mycobacterium tuberculosis, TB remains a global public health threat. Numerous clinical trials are underway studying novel vaccine candidates and strategies to improve or replace BCG, but vaccine development still lacks a well-defined set of immune correlates to predict vaccine-induced protection against tuberculosis. This study aimed to address this gap by examining transcriptional responses to BCG vaccination in C57BL/6 inbred mice, coupled with protection studies using Diversity Outbred mice. We evaluated relative gene expression in blood obtained from vaccinated mice, because blood is easily accessible, and data can be translated to human studies. We first determined that the average peak time after vaccination is 14 days for gene expression of a small subset of immune-related genes in inbred mice. We then performed global transcriptomic analyses using whole blood samples obtained two weeks after mice were vaccinated with BCG. Using comparative bioinformatic analyses and qRT-PCR validation, we developed a working correlate panel of 18 genes that were highly correlated with administration of BCG but not heat-killed BCG. We then tested this gene panel using BCG-vaccinated Diversity Outbred mice and revealed associations between the expression of a subset of genes and disease outcomes after aerosol challenge with M. tuberculosis. These data therefore demonstrate that blood-based transcriptional immune correlates measured within a few weeks after vaccination can be derived to predict protection against M. tuberculosis, even in outbred populations.
Collapse
Affiliation(s)
- Sherry L Kurtz
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| | - Patrik Rydén
- Department of Mathematics and Mathematical Statistics, Umeå University, Umeå, Sweden
| | - Karen L Elkins
- Center for Biologics Evaluation and Research, Food and Drug Administration, Silver Spring, Maryland, United States of America
| |
Collapse
|
7
|
Bajpai AK, Gu Q, Orgil BO, Xu F, Torres-Rojas C, Zhao W, Chen C, Starlard-Davenport A, Jones B, Lebeche D, Towbin JA, Purevjav E, Lu L, Zhang W. Cardiac copper content and its relationship with heart physiology: Insights based on quantitative genetic and functional analyses using BXD family mice. Front Cardiovasc Med 2023; 10:1089963. [PMID: 36818345 PMCID: PMC9931904 DOI: 10.3389/fcvm.2023.1089963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 01/16/2023] [Indexed: 02/05/2023] Open
Abstract
Background Copper (Cu) is essential for the functioning of various enzymes involved in important cellular and physiological processes. Although critical for normal cardiac function, excessive accumulation, or deficiency of Cu in the myocardium is detrimental to the heart. Fluctuations in cardiac Cu content have been shown to cause cardiac pathologies and imbalance in systemic Cu metabolism. However, the genetic basis underlying cardiac Cu levels and their effects on heart traits remain to be understood. Representing the largest murine genetic reference population, BXD strains have been widely used to explore genotype-phenotype associations and identify quantitative trait loci (QTL) and candidate genes. Methods Cardiac Cu concentration and heart function in BXD strains were measured, followed by QTL mapping. The candidate genes modulating Cu homeostasis in mice hearts were identified using a multi-criteria scoring/filtering approach. Results Significant correlations were identified between cardiac Cu concentration and left ventricular (LV) internal diameter and volumes at end-diastole and end-systole, demonstrating that the BXDs with higher cardiac Cu levels have larger LV chamber. Conversely, cardiac Cu levels negatively correlated with LV posterior wall thickness, suggesting that lower Cu concentration in the heart is associated with LV hypertrophy. Genetic mapping identified six QTLs containing a total of 217 genes, which were further narrowed down to 21 genes that showed a significant association with cardiac Cu content in mice. Among those, Prex1 and Irx3 are the strongest candidates involved in cardiac Cu modulation. Conclusion Cardiac Cu level is significantly correlated with heart chamber size and hypertrophy phenotypes in BXD mice, while being regulated by multiple genes in several QTLs. Prex1 and Irx3 may be involved in modulating Cu metabolism and its downstream effects and warrant further experimental and functional validations.
Collapse
Affiliation(s)
- Akhilesh Kumar Bajpai
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Qingqing Gu
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States,Department of Cardiology, Affiliated Hospital of Nantong University, Nantong, Jiangsu, China
| | - Buyan-Ochir Orgil
- Department of Pediatrics, The University of Tennessee Health Science Center, Memphis, TN, United States,Le Bonheur Children’s Hospital, Children’s Foundation Research Institute, Memphis, TN, United States
| | - Fuyi Xu
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States,School of Pharmacy, Shandong Technology Innovation Center of Molecular Targeting and Intelligent Diagnosis and Treatment, Binzhou Medical University, Yantai, Shandong, China
| | - Carolina Torres-Rojas
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Wenyuan Zhao
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Chen Chen
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Athena Starlard-Davenport
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Byron Jones
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Djamel Lebeche
- Department of Physiology, College of Medicine, The University of Tennessee Health Science Center, Memphis, TN, United States
| | - Jeffrey A. Towbin
- Department of Pediatrics, The University of Tennessee Health Science Center, Memphis, TN, United States,Le Bonheur Children’s Hospital, Children’s Foundation Research Institute, Memphis, TN, United States,Pediatric Cardiology, St. Jude Children’s Research Hospital, Memphis, TN, United States
| | - Enkhsaikhan Purevjav
- Department of Pediatrics, The University of Tennessee Health Science Center, Memphis, TN, United States,Le Bonheur Children’s Hospital, Children’s Foundation Research Institute, Memphis, TN, United States
| | - Lu Lu
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States,*Correspondence: Lu Lu,
| | - Wenjing Zhang
- Department of Genetics, Genomics and Informatics, The University of Tennessee Health Science Center, Memphis, TN, United States,Wenjing Zhang,
| |
Collapse
|
8
|
Sylvén C, Wärdell E, Månsson-Broberg A, Cingolani E, Ampatzis K, Larsson L, Björklund Å, Giacomello S. High cardiomyocyte diversity in human early prenatal heart development. iScience 2022; 26:105857. [PMID: 36624836 PMCID: PMC9823232 DOI: 10.1016/j.isci.2022.105857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 07/19/2022] [Accepted: 12/18/2022] [Indexed: 12/24/2022] Open
Abstract
Cardiomyocytes play key roles during cardiogenesis, but have poorly understood features, especially in prenatal stages. Here, we characterized human prenatal cardiomyocytes, 6.5-7 weeks post-conception, by integrating single-cell RNA sequencing, spatial transcriptomics, and ligand-receptor interaction information. Using a computational workflow developed to dissect cell type heterogeneity, localize cell types, and explore their molecular interactions, we identified eight types of developing cardiomyocyte, more than double compared to the ones identified in the Human Developmental Cell Atlas. These have high variability in cell cycle activity, mitochondrial content, and connexin gene expression, and are differentially distributed in the ventricles, including outflow tract, and atria, including sinoatrial node. Moreover, cardiomyocyte ligand-receptor crosstalk is mainly with non-cardiomyocyte cell types, encompassing cardiogenesis-related pathways. Thus, early prenatal human cardiomyocytes are highly heterogeneous and develop unique location-dependent properties, with complex ligand-receptor crosstalk. Further elucidation of their developmental dynamics may give rise to new therapies.
Collapse
Affiliation(s)
- Christer Sylvén
- Department of Medicine, Karolinska Institute, Huddinge, Sweden,Corresponding author
| | - Eva Wärdell
- Department of Medicine, Karolinska Institute, Huddinge, Sweden
| | | | | | | | - Ludvig Larsson
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden
| | - Åsa Björklund
- Department of Cell and Molecular Biology, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Stefania Giacomello
- Science for Life Laboratory, Department of Gene Technology, KTH Royal Institute of Technology, Stockholm, Sweden,Corresponding author
| |
Collapse
|
9
|
Hamledari H, Asghari P, Jayousi F, Aguirre A, Maaref Y, Barszczewski T, Ser T, Moore E, Wasserman W, Klein Geltink R, Teves S, Tibbits GF. Using human induced pluripotent stem cell-derived cardiomyocytes to understand the mechanisms driving cardiomyocyte maturation. Front Cardiovasc Med 2022; 9:967659. [PMID: 36061558 PMCID: PMC9429949 DOI: 10.3389/fcvm.2022.967659] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 07/28/2022] [Indexed: 11/13/2022] Open
Abstract
Cardiovascular diseases are the leading cause of mortality and reduced quality of life globally. Human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) provide a personalized platform to study inherited heart diseases, drug-induced cardiac toxicity, and cardiac regenerative therapy. However, the immaturity of CMs obtained by current strategies is a major hurdle in utilizing hiPSC-CMs at their fullest potential. Here, the major findings and limitations of current maturation methodologies to enhance the utility of hiPSC-CMs in the battle against a major source of morbidity and mortality are reviewed. The most recent knowledge of the potential signaling pathways involved in the transition of fetal to adult CMs are assimilated. In particular, we take a deeper look on role of nutrient sensing signaling pathways and the potential role of cap-independent translation mediated by the modulation of mTOR pathway in the regulation of cardiac gap junctions and other yet to be identified aspects of CM maturation. Moreover, a relatively unexplored perspective on how our knowledge on the effects of preterm birth on cardiovascular development can be actually utilized to enhance the current understanding of CM maturation is examined. Furthermore, the interaction between the evolving neonatal human heart and brown adipose tissue as the major source of neonatal thermogenesis and its endocrine function on CM development is another discussed topic which is worthy of future investigation. Finally, the current knowledge regarding transcriptional mediators of CM maturation is still limited. The recent studies have produced the groundwork to better understand CM maturation in terms of providing some of the key factors involved in maturation and development of metrics for assessment of maturation which proves essential for future studies on in vitro PSC-CMs maturation.
Collapse
Affiliation(s)
- Homa Hamledari
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Cellular and Regenerative Medicine Centre, BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Parisa Asghari
- Department of Cellular and Physiological Sciences, University of British Colombia, Vancouver, BC, Canada
| | - Farah Jayousi
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Cellular and Regenerative Medicine Centre, BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Alejandro Aguirre
- Department of Medical Genetics, University of British Colombia, Vancouver, BC, Canada
- BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Yasaman Maaref
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Cellular and Regenerative Medicine Centre, BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Tiffany Barszczewski
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Cellular and Regenerative Medicine Centre, BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Terri Ser
- BC Children’s Hospital Research Institute, Vancouver, BC, Canada
- Department of Pathology and Laboratory Medicine, University of British Colombia, Vancouver, BC, Canada
| | - Edwin Moore
- Department of Cellular and Physiological Sciences, University of British Colombia, Vancouver, BC, Canada
| | - Wyeth Wasserman
- Department of Medical Genetics, University of British Colombia, Vancouver, BC, Canada
- BC Children’s Hospital Research Institute, Vancouver, BC, Canada
| | - Ramon Klein Geltink
- BC Children’s Hospital Research Institute, Vancouver, BC, Canada
- Department of Pathology and Laboratory Medicine, University of British Colombia, Vancouver, BC, Canada
| | - Sheila Teves
- Department of Biochemistry and Molecular Biology, University of British Colombia, Vancouver, BC, Canada
| | - Glen F. Tibbits
- Department of Biomedical Physiology and Kinesiology, Simon Fraser University, Burnaby, BC, Canada
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC, Canada
- Cellular and Regenerative Medicine Centre, BC Children’s Hospital Research Institute, Vancouver, BC, Canada
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada
| |
Collapse
|
10
|
Crespo-García T, Cámara-Checa A, Dago M, Rubio-Alarcón M, Rapún J, Tamargo J, Delpón E, Caballero R. Regulation of cardiac ion channels by transcription factors: Looking for new opportunities of druggable targets for the treatment of arrhythmias. Biochem Pharmacol 2022; 204:115206. [PMID: 35963339 DOI: 10.1016/j.bcp.2022.115206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/04/2022] [Accepted: 08/05/2022] [Indexed: 11/29/2022]
Abstract
Cardiac electrical activity is governed by different ion channels that generate action potentials. Acquired or inherited abnormalities in the expression and/or function of ion channels usually result in electrophysiological changes that can cause cardiac arrhythmias. Transcription factors (TFs) control gene transcription by binding to specific DNA sequences adjacent to target genes. Linkage analysis, candidate-gene screening within families, and genome-wide association studies have linked rare and common genetic variants in the genes encoding TFs with genetically-determined cardiac arrhythmias. Besides its critical role in cardiac development, recent data demonstrated that they control cardiac electrical activity through the direct regulation of the expression and function of cardiac ion channels in adult hearts. This narrative review summarizes some studies showing functional data on regulation of the main human atrial and ventricular Na+, Ca2+, and K+ channels by cardiac TFs such as Pitx2c, Tbx20, Tbx5, Zfhx3, among others. The results have improved our understanding of the mechanisms regulating cardiac electrical activity and may open new avenues for therapeutic interventions in cardiac acquired or inherited arrhythmias through the identification of TFs as potential drug targets. Even though TFs have for a long time been considered as 'undruggable' targets, advances in structural biology have led to the identification of unique pockets in TFs amenable to be targeted with small-molecule drugs or peptides that are emerging as novel therapeutic drugs.
Collapse
Affiliation(s)
- T Crespo-García
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | - A Cámara-Checa
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | - M Dago
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | - M Rubio-Alarcón
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | - J Rapún
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | - J Tamargo
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | - E Delpón
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain.
| | - R Caballero
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| | -
- Department of Pharmacology and Toxicology. School of Medicine. Universidad Complutense de Madrid, Instituto de Investigación Sanitaria Gregorio Marañón. CIBERCV, 28040 Madrid, Spain
| |
Collapse
|
11
|
Chloe Li KY, Cook AC, Lovering RC. GOing Forward With the Cardiac Conduction System Using Gene Ontology. Front Genet 2022; 13:802393. [PMID: 35309148 PMCID: PMC8924464 DOI: 10.3389/fgene.2022.802393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/09/2022] [Indexed: 02/03/2023] Open
Abstract
The cardiac conduction system (CCS) comprises critical components responsible for the initiation, propagation, and coordination of the action potential. Aberrant CCS development can cause conduction abnormalities, including sick sinus syndrome, accessory pathways, and atrioventricular and bundle branch blocks. Gene Ontology (GO; http://geneontology.org/) is an invaluable global bioinformatics resource which provides structured, computable knowledge describing the functions of gene products. Many gene products are known to be involved in CCS development; however, this information is not comprehensively captured by GO. To address the needs of the heart development research community, this study aimed to describe the specific roles of proteins reported in the literature to be involved with CCS development and/or function. 14 proteins were prioritized for GO annotation which led to the curation of 15 peer-reviewed primary experimental articles using carefully selected GO terms. 152 descriptive GO annotations, including those describing sinoatrial node and atrioventricular node development were created and submitted to the GO Consortium database. A functional enrichment analysis of 35 key CCS development proteins confirmed that this work has improved the in-silico interpretation of this CCS dataset. This work may improve future investigations of the CCS with application of high-throughput methods such as genome-wide association studies analysis, proteomics, and transcriptomics.
Collapse
Affiliation(s)
- Kan Yan Chloe Li
- Department of Preclinical and Fundamental Science, Institute of Cardiovascular Science, Functional Gene Annotation, University College London, London, United Kingdom,Department of Children’s Cardiovascular Disease, Centre for Morphology and Structural Heart Disease, Institute of Cardiovascular Science, University College London, London, United Kingdom,*Correspondence: Kan Yan Chloe Li,
| | - Andrew C Cook
- Department of Children’s Cardiovascular Disease, Centre for Morphology and Structural Heart Disease, Institute of Cardiovascular Science, University College London, London, United Kingdom
| | - Ruth C Lovering
- Department of Preclinical and Fundamental Science, Institute of Cardiovascular Science, Functional Gene Annotation, University College London, London, United Kingdom
| |
Collapse
|
12
|
Dou Z, Son JE, Hui CC. Irx3 and Irx5 - Novel Regulatory Factors of Postnatal Hypothalamic Neurogenesis. Front Neurosci 2021; 15:763856. [PMID: 34795556 PMCID: PMC8593166 DOI: 10.3389/fnins.2021.763856] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 10/07/2021] [Indexed: 12/27/2022] Open
Abstract
The hypothalamus is a brain region that exhibits highly conserved anatomy across vertebrate species and functions as a central regulatory hub for many physiological processes such as energy homeostasis and circadian rhythm. Neurons in the arcuate nucleus of the hypothalamus are largely responsible for sensing of peripheral signals such as leptin and insulin, and are critical for the regulation of food intake and energy expenditure. While these neurons are mainly born during embryogenesis, accumulating evidence have demonstrated that neurogenesis also occurs in postnatal-adult mouse hypothalamus, particularly in the first two postnatal weeks. This second wave of active neurogenesis contributes to the remodeling of hypothalamic neuronal populations and regulation of energy homeostasis including hypothalamic leptin sensing. Radial glia cell types, such as tanycytes, are known to act as neuronal progenitors in the postnatal mouse hypothalamus. Our recent study unveiled a previously unreported radial glia-like neural stem cell (RGL-NSC) population that actively contributes to neurogenesis in the postnatal mouse hypothalamus. We also identified Irx3 and Irx5, which encode Iroquois homeodomain-containing transcription factors, as genetic determinants regulating the neurogenic property of these RGL-NSCs. These findings are significant as IRX3 and IRX5 have been implicated in FTO-associated obesity in humans, illustrating the importance of postnatal hypothalamic neurogenesis in energy homeostasis and obesity. In this review, we summarize current knowledge regarding postnatal-adult hypothalamic neurogenesis and highlight recent findings on the radial glia-like cells that contribute to the remodeling of postnatal mouse hypothalamus. We will discuss characteristics of the RGL-NSCs and potential actions of Irx3 and Irx5 in the regulation of neural stem cells in the postnatal-adult mouse brain. Understanding the behavior and regulation of neural stem cells in the postnatal-adult hypothalamus will provide novel mechanistic insights in the control of hypothalamic remodeling and energy homeostasis.
Collapse
Affiliation(s)
- Zhengchao Dou
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| | - Joe Eun Son
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Chi-chung Hui
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, ON, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, ON, Canada
| |
Collapse
|
13
|
New Insights into the Development and Morphogenesis of the Cardiac Purkinje Fiber Network: Linking Architecture and Function. J Cardiovasc Dev Dis 2021; 8:jcdd8080095. [PMID: 34436237 PMCID: PMC8397066 DOI: 10.3390/jcdd8080095] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 12/30/2022] Open
Abstract
The rapid propagation of electrical activity through the ventricular conduction system (VCS) controls spatiotemporal contraction of the ventricles. Cardiac conduction defects or arrhythmias in humans are often associated with mutations in key cardiac transcription factors that have been shown to play important roles in VCS morphogenesis in mice. Understanding of the mechanisms of VCS development is thus crucial to decipher the etiology of conduction disturbances in adults. During embryogenesis, the VCS, consisting of the His bundle, bundle branches, and the distal Purkinje network, originates from two independent progenitor populations in the primary ring and the ventricular trabeculae. Differentiation into fast-conducting cardiomyocytes occurs progressively as ventricles develop to form a unique electrical pathway at late fetal stages. The objectives of this review are to highlight the structure–function relationship between VCS morphogenesis and conduction defects and to discuss recent data on the origin and development of the VCS with a focus on the distal Purkinje fiber network.
Collapse
|
14
|
Al Sayed ZR, Canac R, Cimarosti B, Bonnard C, Gourraud JB, Hamamy H, Kayserili H, Girardeau A, Jouni M, Jacob N, Gaignerie A, Chariau C, David L, Forest V, Marionneau C, Charpentier F, Loussouarn G, Lamirault G, Reversade B, Zibara K, Lemarchand P, Gaborit N. Human model of IRX5 mutations reveals key role for this transcription factor in ventricular conduction. Cardiovasc Res 2021; 117:2092-2107. [PMID: 32898233 DOI: 10.1093/cvr/cvaa259] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 01/15/2020] [Accepted: 08/28/2020] [Indexed: 01/02/2023] Open
Abstract
AIMS Several inherited arrhythmic diseases have been linked to single gene mutations in cardiac ion channels and interacting proteins. However, the mechanisms underlying most arrhythmias, are thought to involve altered regulation of the expression of multiple effectors. In this study, we aimed to examine the role of a transcription factor (TF) belonging to the Iroquois homeobox family, IRX5, in cardiac electrical function. METHODS AND RESULTS Using human cardiac tissues, transcriptomic correlative analyses between IRX5 and genes involved in cardiac electrical activity showed that in human ventricular compartment, IRX5 expression strongly correlated to the expression of major actors of cardiac conduction, including the sodium channel, Nav1.5, and Connexin 40 (Cx40). We then generated human-induced pluripotent stem cells (hiPSCs) derived from two Hamamy syndrome-affected patients carrying distinct homozygous loss-of-function mutations in IRX5 gene. Cardiomyocytes derived from these hiPSCs showed impaired cardiac gene expression programme, including misregulation in the control of Nav1.5 and Cx40 expression. In accordance with the prolonged QRS interval observed in Hamamy syndrome patients, a slower ventricular action potential depolarization due to sodium current reduction was observed on electrophysiological analyses performed on patient-derived cardiomyocytes, confirming the functional role of IRX5 in electrical conduction. Finally, a cardiac TF complex was newly identified, composed by IRX5 and GATA4, in which IRX5 potentiated GATA4-induction of SCN5A expression. CONCLUSION Altogether, this work unveils a key role for IRX5 in the regulation of human ventricular depolarization and cardiac electrical conduction, providing therefore new insights into our understanding of cardiac diseases.
Collapse
Affiliation(s)
- Zeina R Al Sayed
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Robin Canac
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Bastien Cimarosti
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Carine Bonnard
- Institute of Medical Biology, A*STAR, 8A Biomedical Grove, Singapore 138648, Singapore
| | - Jean-Baptiste Gourraud
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
- Université de Nantes, CHU Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Hanan Hamamy
- Department of Genetic Medicine and Development, Geneva University, 1 rue Michel-Servet, Geneva 1211, Switzerland
| | - Hulya Kayserili
- Medical Genetics Department, Koç University School of Medicine(KUSOM), Rumelifeneri Yolu 34450, Istanbul, Turkey
| | - Aurore Girardeau
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Mariam Jouni
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Nicolas Jacob
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Anne Gaignerie
- Université de Nantes, CHU Nantes, Inserm, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, 8 Quai Moncousu, F-44000 Nantes, France
| | - Caroline Chariau
- Université de Nantes, CHU Nantes, Inserm, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, 8 Quai Moncousu, F-44000 Nantes, France
| | - Laurent David
- Université de Nantes, CHU Nantes, Inserm, CNRS, SFR Santé, Inserm UMS 016, CNRS UMS 3556, 8 Quai Moncousu, F-44000 Nantes, France
- Université de Nantes, INSERM, CRTI, 30 Bd Jean Monnet, F-44093 Nantes, France
- ITUN, CHU Nantes, 30 Bd Jean Monnet, F-44093 Nantes, France
| | - Virginie Forest
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Céline Marionneau
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Flavien Charpentier
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
- Université de Nantes, CHU Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Gildas Loussouarn
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Guillaume Lamirault
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
- Université de Nantes, CHU Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Bruno Reversade
- Institute of Medical Biology, A*STAR, 8A Biomedical Grove, Singapore 138648, Singapore
- Medical Genetics Department, Koç University School of Medicine(KUSOM), Rumelifeneri Yolu 34450, Istanbul, Turkey
- Department of Paediatrics, National University of Singapore, 1E Kent Ridge Road, Singapore 119228, Singapore
- Institute of Molecular and Cellular Biology, A*STAR, 61 Biopolis Drive, Singapore 138673, Singapore
- Reproductive Biology Laboratory, Amsterdam UMC, Meibergdreef 9 1105, Amsterdam-Zuidoost, Netherlands
| | - Kazem Zibara
- ER045, Laboratory of stem cells, DSST, Biology department, Faculty of Sciences, Lebanese University, Rafic Hariri Campus - Hadath, Beirut 1700, Lebanon
| | - Patricia Lemarchand
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
- Université de Nantes, CHU Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| | - Nathalie Gaborit
- Université de Nantes, CNRS, INSERM, l'institut du thorax, 8 quai Moncousu, F-44000 Nantes, France
| |
Collapse
|
15
|
Surget E, Cheniti G, Ramirez FD, Leenhardt A, Nogami A, Gandjbakhch E, Extramiana F, Hidden-Lucet F, Pillois X, Benoist D, Krisai P, Nakatani Y, Nakashima T, Takagi T, Kamakura T, André C, Welte N, Chauvel R, Tixier R, Duchateau J, Pambrun T, Derval N, Jaïs P, Sacher F, Bernus O, Hocini M, Haïssaguerre M. Sex differences in the origin of Purkinje ectopy-initiated idiopathic ventricular fibrillation. Heart Rhythm 2021; 18:1647-1654. [PMID: 34260987 DOI: 10.1016/j.hrthm.2021.07.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Revised: 07/02/2021] [Accepted: 07/07/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Purkinje ectopics (PurkEs) are major triggers of idiopathic ventricular fibrillation (VF). Identifying clinical factors associated with specific PurkE characteristics could yield insights into the mechanisms of Purkinje-mediated arrhythmogenicity. OBJECTIVE The purpose of this study was to examine the associations of clinical, environmental, and genetic factors with PurkE origin in patients with PurkE-initiated idiopathic VF. METHODS Consecutive patients with PurkE-initiated idiopathic VF from 4 arrhythmia referral centers were included. We evaluated demographic characteristics, medical history, clinical circumstances associated with index VF events, and electrophysiological characteristics of PurkEs. An electrophysiology study was performed in most patients to confirm the Purkinje origin. RESULTS Eighty-three patients were included (mean age 38 ± 14 years; 44 [53%] women), of whom 32 had a history of syncope. Forty-four patients had VF at rest. PurkEs originated from the right ventricle (RV) in 41 patients (49%), from the left ventricle (LV) in 36 (44%), and from both ventricles in 6 (7%). Seasonal and circadian distributions of VF episodes were similar according to PurkE origin. The clinical characteristics of patients with RV vs LV PurkE origins were similar, except for sex. RV PurkEs were more frequent in men than in women (76% vs 24%), whereas LV and biventricular PurkEs were more frequent in women (81% vs 19% and 83% vs 17%, respectively) (P < .0001). CONCLUSION PurkEs triggering idiopathic VF originate dominantly from the RV in men and from the LV or both ventricles in women, adding to other sex-related arrhythmias such as Brugada syndrome or long QT syndrome. Sex-based factors influencing Purkinje arrhythmogenicity warrant investigation.
Collapse
Affiliation(s)
- Elodie Surget
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France.
| | - Ghassen Cheniti
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - F Daniel Ramirez
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Antoine Leenhardt
- Université de Paris, CNMR, Maladies Cardiaques Héréditaires Rares, Hôpital Bichat, INSERMU1166, Paris, France
| | - Akihiko Nogami
- Cardiovascular Division, Faculty of Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan
| | - Estelle Gandjbakhch
- Département de Cardiologie, Hôpital Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Fabrice Extramiana
- Université de Paris, CNMR, Maladies Cardiaques Héréditaires Rares, Hôpital Bichat, INSERMU1166, Paris, France
| | - Françoise Hidden-Lucet
- Département de Cardiologie, Hôpital Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Xavier Pillois
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - David Benoist
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France
| | - Philipp Krisai
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Yosuke Nakatani
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Takashi Nakashima
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Takamitsu Takagi
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Tsukasa Kamakura
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Clémentine André
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Nicolas Welte
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Rémi Chauvel
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Romain Tixier
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Josselin Duchateau
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Thomas Pambrun
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Nicolas Derval
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Pierre Jaïs
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Frédéric Sacher
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Olivier Bernus
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France
| | - Mélèze Hocini
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| | - Michel Haïssaguerre
- IHU Liryc, Electrophysiology and Heart Modeling Institute, Foundation Bordeaux Université, Bordeaux, France; Electrophysiology and Ablation Unit, Bordeaux University Hospital (CHU), Pessac, France
| |
Collapse
|
16
|
Mantri S, Wu SM, Goodyer WR. Molecular Profiling of the Cardiac Conduction System: the Dawn of a New Era. Curr Cardiol Rep 2021; 23:103. [PMID: 34196831 DOI: 10.1007/s11886-021-01536-w] [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] [Accepted: 05/17/2021] [Indexed: 11/28/2022]
Abstract
PURPOSE OF REVIEW Recent technological advances have led to an increased ability to define the gene expression profile of the cardiac conduction system (CCS). Here, we review the most salient studies to emerge in recent years and discuss existing gaps in our knowledge as well as future areas of investigation. RECENT FINDINGS Molecular profiling of the CCS spans several decades. However, the advent of high-throughput sequencing strategies has allowed for the discovery of unique transcriptional programs of the many diverse CCS cell types. The CCS, a diverse structure with significant inter- and intra-component cellular heterogeneity, is essential to the normal function of the heart. Progress in transcriptomic profiling has improved the resolution and depth of characterization of these unique and clinically relevant CCS cell types. Future studies leveraging this big data will play a crucial role in improving our understanding of CCS development and function as well as translating these findings into tangible translational tools for the improved detection, prevention, and treatment of cardiac arrhythmias.
Collapse
Affiliation(s)
- Sruthi Mantri
- Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Sean M Wu
- Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA.,Division of Pediatric Cardiology, Department of Pediatrics, Stanford University, Stanford, CA, 94305, USA.,Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - William R Goodyer
- Cardiovascular Institute, Stanford University School of Medicine, Stanford, CA, 94305, USA. .,Division of Pediatric Cardiology, Department of Pediatrics, Stanford University, Stanford, CA, 94305, USA. .,Division of Pediatric Cardiology, Electrophysiology, Department of Pediatrics, Lucile Packard Children's Hospital, Stanford University School of Medicine, Room G1105 Lokey Stem Cell Research Building, 265 Campus Drive, Stanford, CA, 94305, USA.
| |
Collapse
|
17
|
Son JE, Dou Z, Kim KH, Wanggou S, Cha VSB, Mo R, Zhang X, Chen X, Ketela T, Li X, Huang X, Hui CC. Irx3 and Irx5 in Ins2-Cre + cells regulate hypothalamic postnatal neurogenesis and leptin response. Nat Metab 2021; 3:701-713. [PMID: 33859429 DOI: 10.1038/s42255-021-00382-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 03/08/2021] [Indexed: 12/24/2022]
Abstract
Obesity is mainly due to excessive food intake. IRX3 and IRX5 have been suggested as determinants of obesity in connection with the intronic variants of FTO, but how these genes contribute to obesity via changes in food intake remains unclear. Here, we show that mice doubly heterozygous for Irx3 and Irx5 mutations exhibit lower food intake with enhanced hypothalamic leptin response. By lineage tracing and single-cell RNA sequencing using the Ins2-Cre system, we identify a previously unreported radial glia-like neural stem cell population with high Irx3 and Irx5 expression in early postnatal hypothalamus and demonstrate that reduced dosage of Irx3 and Irx5 promotes neurogenesis in postnatal hypothalamus leading to elevated numbers of leptin-sensing arcuate neurons. Furthermore, we find that mice with deletion of Irx3 in these cells also exhibit a similar food intake and hypothalamic phenotype. Our results illustrate that Irx3 and Irx5 play a regulatory role in hypothalamic postnatal neurogenesis and leptin response.
Collapse
Affiliation(s)
- Joe Eun Son
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Zhengchao Dou
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Kyoung-Han Kim
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- University of Ottawa Heart Institute and Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Siyi Wanggou
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
| | - Vincent Su Bin Cha
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Rong Mo
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Xiaoyun Zhang
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Xinyu Chen
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Troy Ketela
- Princess Margaret Genomics Centre, University Health Network, Toronto, Ontario, Canada
| | - Xuejun Li
- Department of Neurosurgery, Xiangya Hospital, Central South University, Changsha, China
| | - Xi Huang
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Chi-Chung Hui
- Program in Developmental & Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario, Canada.
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada.
| |
Collapse
|
18
|
Kim KH, Backx PH. Understanding the role of Iroquois homeobox transcription factor 5 (IRX5) in cardiac function: getting to the (human) heart of the matter. Cardiovasc Res 2021; 117:1989-1991. [PMID: 33739382 DOI: 10.1093/cvr/cvab098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Kyoung-Han Kim
- University of Ottawa Heart Institute, 40 Ruskin Street, Ottawa, ON K1Y 4W7, Canada.,Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, 451 Smyth road, Ottawa, ON K1N 6N5, Canada
| | - Peter H Backx
- Department of Biology, York University, 4700 Keele St, Toronto, ON M3J 1P3, Canada.,Division of Cardiology and the Peter Munk Cardiac Centre, University Health Network, 101 College St, Toronto, ON M5G 1L7, Canada
| |
Collapse
|
19
|
Bhattacharyya S, Munshi NV. Development of the Cardiac Conduction System. Cold Spring Harb Perspect Biol 2020; 12:cshperspect.a037408. [PMID: 31988140 DOI: 10.1101/cshperspect.a037408] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The cardiac conduction system initiates and propagates each heartbeat. Specialized conducting cells are a well-conserved phenomenon across vertebrate evolution, although mammalian and avian species harbor specific components unique to organisms with four-chamber hearts. Early histological studies in mammals provided evidence for a dominant pacemaker within the right atrium and clarified the existence of the specialized muscular axis responsible for atrioventricular conduction. Building on these seminal observations, contemporary genetic techniques in a multitude of model organisms has characterized the developmental ontogeny, gene regulatory networks, and functional importance of individual anatomical compartments within the cardiac conduction system. This review describes in detail the transcriptional and regulatory networks that act during cardiac conduction system development and homeostasis with a particular emphasis on networks implicated in human electrical variation by large genome-wide association studies. We conclude with a discussion of the clinical implications of these studies and describe some future directions.
Collapse
Affiliation(s)
| | - Nikhil V Munshi
- Department of Internal Medicine, Division of Cardiology.,McDermott Center for Human Growth and Development.,Department of Molecular Biology, UT Southwestern Medical Center, Dallas, Texas 75390, USA.,Hamon Center for Regenerative Science and Medicine, Dallas, Texas 75390, USA
| |
Collapse
|
20
|
Nkx2-5 defines distinct scaffold and recruitment phases during formation of the murine cardiac Purkinje fiber network. Nat Commun 2020; 11:5300. [PMID: 33082351 PMCID: PMC7575572 DOI: 10.1038/s41467-020-19150-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 09/29/2020] [Indexed: 01/24/2023] Open
Abstract
The ventricular conduction system coordinates heartbeats by rapid propagation of electrical activity through the Purkinje fiber (PF) network. PFs share common progenitors with contractile cardiomyocytes, yet the mechanisms of segregation and network morphogenesis are poorly understood. Here, we apply genetic fate mapping and temporal clonal analysis to identify murine cardiomyocytes committed to the PF lineage as early as E7.5. We find that a polyclonal PF network emerges by progressive recruitment of conductive precursors to this scaffold from a pool of bipotent progenitors. At late fetal stages, the segregation of conductive cells increases during a phase of rapid recruitment to build the definitive PF network through a non-cell autonomous mechanism. We also show that PF differentiation is impaired in Nkx2-5 haploinsufficient embryos leading to failure to extend the scaffold. In particular, late fetal recruitment fails, resulting in PF hypoplasia and persistence of bipotent progenitors. Our results identify how transcription factor dosage regulates cell fate divergence during distinct phases of PF network morphogenesis. Here, the authors apply genetic fate mapping and temporal clonal analysis to study progenitor recruitment and network morphogenesis of murine cardiac Purkinje fibers. Additionally, they characterize how transcription factor dosage regulates cell fate divergence during distinct phases of this process.
Collapse
|
21
|
Park DS, Fishman GI. T for Two: T-Box Factors and the Functional Dichotomy of the Conduction System. Circ Res 2020; 127:357-359. [PMID: 32673534 DOI: 10.1161/circresaha.120.317421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- David S Park
- From the Leon H. Charney Division of Cardiology, NYU Grossman School of Medicine, New York
| | - Glenn I Fishman
- From the Leon H. Charney Division of Cardiology, NYU Grossman School of Medicine, New York
| |
Collapse
|
22
|
Visualization of cardiovascular development, physiology and disease at the single-cell level: Opportunities and future challenges. J Mol Cell Cardiol 2020; 142:80-92. [PMID: 32205182 DOI: 10.1016/j.yjmcc.2020.03.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/13/2020] [Accepted: 03/17/2020] [Indexed: 12/18/2022]
Abstract
Single-cell RNA sequencing (scRNA-seq), a method of transcriptome sequencing at the single-cell level, has recently emerged as a revolutionary technology in the field of biomedical research. Compared to conventional gene expression profiling in bulk, scRNA-seq resolves biological differences among individual cells and enables the identification of rare cell populations that are easily overlooked. This review introduces the method of scRNA-seq, summarizes its applications in the field of cardiovascular disease research, and discusses existing limitations and prospects for future applications.
Collapse
|
23
|
Defects in Trabecular Development Contribute to Left Ventricular Noncompaction. Pediatr Cardiol 2019; 40:1331-1338. [PMID: 31342111 DOI: 10.1007/s00246-019-02161-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Accepted: 07/16/2019] [Indexed: 10/26/2022]
Abstract
Left ventricular noncompaction (LVNC) is a genetically heterogeneous disorder the etiology of which is still debated. During fetal development, trabecular cardiomyocytes contribute extensively to the working myocardium and the ventricular conduction system. The impact of developmental defects in trabecular myocardium in the etiology of LVNC has been debated. Recently we generated new mouse models of LVNC by the conditional deletion of the key cardiac transcription factor encoding gene Nkx2-5 in trabecular myocardium at critical steps of trabecular development. These conditional mutant mice recapitulate pathological features similar to those observed in LVNC patients, including a hypertrabeculated left ventricle with deep endocardial recesses, subendocardial fibrosis, conduction defects, strain defects, and progressive heart failure. After discussing recent findings describing the respective contribution of trabecular and compact myocardium during ventricular morphogenesis, this review will focus on new data reflecting the link between trabecular development and LVNC.
Collapse
|
24
|
Goodyer WR, Beyersdorf BM, Paik DT, Tian L, Li G, Buikema JW, Chirikian O, Choi S, Venkatraman S, Adams EL, Tessier-Lavigne M, Wu JC, Wu SM. Transcriptomic Profiling of the Developing Cardiac Conduction System at Single-Cell Resolution. Circ Res 2019; 125:379-397. [PMID: 31284824 DOI: 10.1161/circresaha.118.314578] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
RATIONALE The cardiac conduction system (CCS) consists of distinct components including the sinoatrial node, atrioventricular node, His bundle, bundle branches, and Purkinje fibers. Despite an essential role for the CCS in heart development and function, the CCS has remained challenging to interrogate because of inherent obstacles including small cell numbers, large cell-type heterogeneity, complex anatomy, and difficulty in isolation. Single-cell RNA-sequencing allows for genome-wide analysis of gene expression at single-cell resolution. OBJECTIVE Assess the transcriptional landscape of the entire CCS at single-cell resolution by single-cell RNA-sequencing within the developing mouse heart. METHODS AND RESULTS Wild-type, embryonic day 16.5 mouse hearts (n=6 per zone) were harvested and 3 zones of microdissection were isolated, including: Zone I-sinoatrial node region; Zone II-atrioventricular node/His region; and Zone III-bundle branch/Purkinje fiber region. Tissue was digested into single-cell suspensions, cells isolated, mRNA reverse transcribed, and barcoded before high-throughput sequencing and bioinformatics analyses. Single-cell RNA-sequencing was performed on over 22 000 cells, and all major cell types of the murine heart were successfully captured including bona fide clusters of cells consistent with each major component of the CCS. Unsupervised weighted gene coexpression network analysis led to the discovery of a host of novel CCS genes, a subset of which were validated using fluorescent in situ hybridization as well as whole-mount immunolabeling with volume imaging (iDISCO+) in 3 dimensions on intact mouse hearts. Further, subcluster analysis unveiled isolation of distinct CCS cell subtypes, including the clinically relevant but poorly characterized transitional cells that bridge the CCS and surrounding myocardium. CONCLUSIONS Our study represents the first comprehensive assessment of the transcriptional profiles from the entire CCS at single-cell resolution and provides a characterization in the context of development and disease.
Collapse
Affiliation(s)
- William R Goodyer
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Pediatrics (W.R.G., S.M.W.), Stanford University, CA
| | - Benjamin M Beyersdorf
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Cardiovascular Surgery, Institute Insure (Institute for Translational Cardiac Surgery), German Heart Center Munich at the Technical University of Munich, Germany (B.M.B.)
| | - David T Paik
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA
| | - Lei Tian
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA
| | - Guang Li
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Developmental Biology, University of Pittsburgh School of Medicine, PA (G.L.)
| | - Jan W Buikema
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Cardiology, Utrecht Regenerative Medicine Center, University Medical Center Utrecht, Utrecht University, The Netherlands (J.W.B.)
| | - Orlando Chirikian
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Molecular, Cellular, and Developmental Biology, UC Santa Barbara, CA (O.C.)
| | - Shannon Choi
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA
| | - Sneha Venkatraman
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA
| | - Eliza L Adams
- Department of Biology (E.L.A., M.T.-L.), Stanford University, CA
| | | | - Joseph C Wu
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Medicine, Cardiovascular Medicine (J.C.W., S.M.W.), Stanford University School of Medicine, CA
| | - Sean M Wu
- From the Cardiovascular Institute (W.R.G., B.M.B., D.T.P., L.T., G.L., J.W.B., O.C., S.C., S.V., J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Medicine, Cardiovascular Medicine (J.C.W., S.M.W.), Stanford University School of Medicine, CA.,Department of Pediatrics (W.R.G., S.M.W.), Stanford University, CA
| |
Collapse
|
25
|
Duijkers FA, McDonald A, Janssens GE, Lezzerini M, Jongejan A, van Koningsbruggen S, Leeuwenburgh-Pronk WG, Wlodarski MW, Moutton S, Tran-Mau-Them F, Thauvin-Robinet C, Faivre L, Monaghan KG, Smol T, Boute-Benejean O, Ladda RL, Sell SL, Bruel AL, Houtkooper RH, MacInnes AW. HNRNPR Variants that Impair Homeobox Gene Expression Drive Developmental Disorders in Humans. Am J Hum Genet 2019; 104:1040-1059. [PMID: 31079900 PMCID: PMC6556882 DOI: 10.1016/j.ajhg.2019.03.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 03/25/2019] [Indexed: 12/18/2022] Open
Abstract
The heterogeneous nuclear ribonucleoprotein (HNRNP) genes code for a set of RNA-binding proteins that function primarily in the spliceosome C complex. Pathogenic variants in these genes can drive neurodegeneration, through a mechanism involving excessive stress-granule formation, or developmental defects, through mechanisms that are not known. Here, we report four unrelated individuals who have truncating or missense variants in the same C-terminal region of hnRNPR and who have multisystem developmental defects including abnormalities of the brain and skeleton, dysmorphic facies, brachydactyly, seizures, and hypoplastic external genitalia. We further identified in the literature a fifth individual with a truncating variant. RNA sequencing of primary fibroblasts reveals that these HNRNPR variants drive significant changes in the expression of several homeobox genes, as well as other transcription factors, such as LHX9, TBX1, and multiple HOX genes, that are considered fundamental regulators of embryonic and gonad development. Higher levels of retained intronic HOX sequences and lost splicing events in the HOX cluster are observed in cells carrying HNRNPR variants, suggesting that impaired splicing is at least partially driving HOX deregulation. At basal levels, stress-granule formation appears normal in primary and transfected cells expressing HNRNPR variants. However, these cells reveal profound recovery defects, where stress granules fail to disassemble properly, after exposure to oxidative stress. This study establishes an essential role for HNRNPR in human development and points to a mechanism that may unify other "spliceosomopathies" linked to variants that drive multi-system congenital defects and are found in hnRNPs.
Collapse
Affiliation(s)
- Floor A Duijkers
- Amsterdam University Medical Centers, University of Amsterdam, Department of Clinical Genetics, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Andrew McDonald
- Amsterdam University Medical Centers, University of Amsterdam, Laboratory Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Georges E Janssens
- Amsterdam University Medical Centers, University of Amsterdam, Laboratory Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Marco Lezzerini
- Amsterdam University Medical Centers, University of Amsterdam, Laboratory Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Aldo Jongejan
- Amsterdam University Medical Centers, University of Amsterdam, Bioinformatics Laboratory, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Silvana van Koningsbruggen
- Amsterdam University Medical Centers, University of Amsterdam, Department of Clinical Genetics, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Wendela G Leeuwenburgh-Pronk
- Amsterdam University Medical Centers, University of Amsterdam, Department of Pediatrics, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Marcin W Wlodarski
- Department of Pediatric Hematology and Oncology, University of Freiburg, D-79106 Freiburg, Germany
| | - Sébastien Moutton
- Institut National de la Santé et de la Recherche Médicale UMR 1231 GAD, Génétique des Anomalies du Dévelopement, Université de Bourgogne-Franche Comté, F-21079 Dijon, France; Fédération Hospitalo-Universitaire Médecine TRANSLationnelle et Anomalies du Développement, Centre Hospitalier Universitaire et Université de Bourgogne-Franche Comté, 21000 Dijon, France; Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Inter-région Est, Centre Hospitalier Universitaire Dijon Bourgogne, F-21079 Dijon, France
| | - Frédéric Tran-Mau-Them
- Institut National de la Santé et de la Recherche Médicale UMR 1231 GAD, Génétique des Anomalies du Dévelopement, Université de Bourgogne-Franche Comté, F-21079 Dijon, France; Fédération Hospitalo-Universitaire Médecine TRANSLationnelle et Anomalies du Développement, Centre Hospitalier Universitaire et Université de Bourgogne-Franche Comté, 21000 Dijon, France
| | - Christel Thauvin-Robinet
- Institut National de la Santé et de la Recherche Médicale UMR 1231 GAD, Génétique des Anomalies du Dévelopement, Université de Bourgogne-Franche Comté, F-21079 Dijon, France; Fédération Hospitalo-Universitaire Médecine TRANSLationnelle et Anomalies du Développement, Centre Hospitalier Universitaire et Université de Bourgogne-Franche Comté, 21000 Dijon, France; Centre de Génétique et Centre de Référence Anomalies du Développement et Syndromes Malformatifs de l'Inter-région Est, Centre Hospitalier Universitaire Dijon Bourgogne, F-21079 Dijon, France
| | - Laurence Faivre
- Institut National de la Santé et de la Recherche Médicale UMR 1231 GAD, Génétique des Anomalies du Dévelopement, Université de Bourgogne-Franche Comté, F-21079 Dijon, France
| | | | - Thomas Smol
- Université de Lille, EA 7364 - RADEME, F-59000 Lille, France; Centre Hospitalier Universitaire Lille, Institut de Génétique Médicale, F-59000 Lille, France
| | - Odile Boute-Benejean
- Université de Lille, EA 7364 - RADEME, F-59000 Lille, France; Centre Hospitalier Universitaire Lille, Institut de Génétique Médicale, F-59000 Lille, France
| | - Roger L Ladda
- Department of Pediatrics, Penn State Children's Hospital, Hershey, PA 17033, USA
| | - Susan L Sell
- Department of Pediatrics, Penn State Children's Hospital, Hershey, PA 17033, USA
| | - Ange-Line Bruel
- Institut National de la Santé et de la Recherche Médicale UMR 1231 GAD, Génétique des Anomalies du Dévelopement, Université de Bourgogne-Franche Comté, F-21079 Dijon, France; Fédération Hospitalo-Universitaire Médecine TRANSLationnelle et Anomalies du Développement, Centre Hospitalier Universitaire et Université de Bourgogne-Franche Comté, 21000 Dijon, France
| | - Riekelt H Houtkooper
- Amsterdam University Medical Centers, University of Amsterdam, Laboratory Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands
| | - Alyson W MacInnes
- Amsterdam University Medical Centers, University of Amsterdam, Laboratory Genetic Metabolic Diseases, Amsterdam Gastroenterology and Metabolism, Meibergdreef 9, 1105 AZ Amsterdam, the Netherlands.
| |
Collapse
|
26
|
Hausner EA, Elmore SA, Yang X. Overview of the Components of Cardiac Metabolism. Drug Metab Dispos 2019; 47:673-688. [PMID: 30967471 PMCID: PMC7333657 DOI: 10.1124/dmd.119.086611] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 03/26/2019] [Indexed: 12/20/2022] Open
Abstract
Metabolism in organs other than the liver and kidneys may play a significant role in how a specific organ responds to chemicals. The heart has metabolic capability for energy production and homeostasis. This homeostatic machinery can also process xenobiotics. Cardiac metabolism includes the expression of numerous organic anion transporters, organic cation transporters, organic carnitine (zwitterion) transporters, and ATP-binding cassette transporters. Expression and distribution of the transporters within the heart may vary, depending on the patient’s age, disease, endocrine status, and various other factors. Several cytochrome P450 (P450) enzyme classes have been identified within the heart. The P450 hydroxylases and epoxygenases within the heart produce hydroxyeicosatetraneoic acids and epoxyeicosatrienoic acids, metabolites of arachidonic acid, which are critical in regulating homeostatic processes of the heart. The susceptibility of the cardiac P450 system to induction and inhibition from exogenous materials is an area of expanding knowledge, as are the metabolic processes of glucuronidation and sulfation in the heart. The susceptibility of various transcription factors and signaling pathways of the heart to disruption by xenobiotics is not fully characterized but is an area with implications for disruption of normal postnatal development, as well as modulation of adult cardiac health. There are knowledge gaps in the timelines of physiologic maturation and deterioration of cardiac metabolism. Cross-species characterization of cardiac-specific metabolism is needed for nonclinical work of optimum translational value to predict possible adverse effects, identify sensitive developmental windows for the design and conduct of informative nonclinical and clinical studies, and explore the possibilities of organ-specific therapeutics.
Collapse
Affiliation(s)
- Elizabeth A Hausner
- United States Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland (E.A.H., X.Y.); and National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina (S.A.E.)
| | - Susan A Elmore
- United States Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland (E.A.H., X.Y.); and National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina (S.A.E.)
| | - Xi Yang
- United States Food and Drug Administration, Center for Drug Evaluation and Research, Silver Spring, Maryland (E.A.H., X.Y.); and National Toxicology Program, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina (S.A.E.)
| |
Collapse
|
27
|
Samal E, Evangelista M, Galang G, Srivastava D, Zhao Y, Vedantham V. Premature MicroRNA-1 Expression Causes Hypoplasia of the Cardiac Ventricular Conduction System. Front Physiol 2019; 10:235. [PMID: 30936836 PMCID: PMC6431665 DOI: 10.3389/fphys.2019.00235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 02/22/2019] [Indexed: 12/27/2022] Open
Abstract
Mammalian cardiac Purkinje fibers (PFs) are specified from ventricular trabecular myocardium during mid-gestation and undergo limited proliferation before assuming their final form. MicroRNA-1 (miR-1), a negative regulator of proliferation, is normally expressed in the heart at low levels during the period of PF specification and outgrowth, but expression rises steeply after birth, when myocardial proliferation slows and postnatal cardiac maturation and growth commence. Here, we test whether premature up-regulation and overexpression of miR-1 during the period of PF morphogenesis influences PF development and function. Using a mouse model in which miR-1 is expressed under the control of the Myh6 promoter, we demonstrate that premature miR-1 expression leads to PF hypoplasia that persists into adulthood, and miR-1 TG mice exhibit delayed conduction through the ventricular myocardium beginning at neonatal stages. In addition, miR-1 transgenic embryos showed reduced proliferation within the trabecular myocardium and embryonic ventricular conduction system (VCS), a source of progenitor cells for the PF. This repression of proliferation may be mediated by direct translational inhibition by miR-1 of the cyclin dependent kinase Cdk6, a key regulator of embryonic myocardial proliferation. Our results suggest that altering the timing of miR-1 expression can regulate PF development, findings which have implications for our understanding of conduction system development and disease in humans.
Collapse
Affiliation(s)
- Eva Samal
- Gladstone Institute of Cardiovascular Disease, San Francisco, CA, United States
| | - Melissa Evangelista
- Gladstone Institute of Cardiovascular Disease, San Francisco, CA, United States.,Department of Medicine, University of California, San Francisco, San Francisco, CA, United States
| | - Giselle Galang
- Gladstone Institute of Cardiovascular Disease, San Francisco, CA, United States.,Department of Medicine, University of California, San Francisco, San Francisco, CA, United States.,Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, United States
| | - Deepak Srivastava
- Gladstone Institute of Cardiovascular Disease, San Francisco, CA, United States.,Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, United States.,Biochemistry and Biophysics, University of California, San Francisco, San Francisco, CA, United States.,Department of Pediatrics, University of California, San Francisco, San Francisco, CA, United States
| | - Yong Zhao
- Department of Genetics and Genomic Sciences, Mount Sinai Hospital, New York, NY, United States
| | - Vasanth Vedantham
- Gladstone Institute of Cardiovascular Disease, San Francisco, CA, United States.,Department of Medicine, University of California, San Francisco, San Francisco, CA, United States.,Cardiovascular Research Institute, University of California, San Francisco, San Francisco, CA, United States
| |
Collapse
|
28
|
Goodyer W, Wu SM. Fates Aligned: Origins and Mechanisms of Ventricular Conduction System and Ventricular Wall Development. Pediatr Cardiol 2018; 39:1090-1098. [PMID: 29594502 PMCID: PMC6093793 DOI: 10.1007/s00246-018-1869-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 03/14/2018] [Indexed: 12/19/2022]
Abstract
The cardiac conduction system is a network of distinct cell types necessary for the coordinated contraction of the cardiac chambers. The distal portion, known as the ventricular conduction system, allows for the rapid transmission of impulses from the atrio-ventricular node to the ventricular myocardium and plays a central role in cardiac function as well as disease when perturbed. Notably, its patterning during embryogenesis is intimately linked to that of ventricular wall formation, including trabeculation and compaction. Here, we review our current understanding of the underlying mechanisms responsible for the development and maturation of these interdependent processes.
Collapse
Affiliation(s)
- William Goodyer
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Division of Pediatric Cardiology, Department of Pediatrics, Lucille Packard Children’s Hospital, Stanford, CA 94305, USA
| | - Sean M. Wu
- Cardiovascular Institute, Stanford University, Stanford, CA 94305, USA,Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA,Division of Cardiovascular Medicine, Department of Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA,Correspondence: Sean M. Wu, M.D. PhD., Lokey Stem Cell Building, Room G1120A, 265 Campus Drive, Stanford, CA 94305, Phone No. 650-724-4498, Fax No. 650-726-4689,
| |
Collapse
|
29
|
Shekhar A, Lin X, Lin B, Liu FY, Zhang J, Khodadadi-Jamayran A, Tsirigos A, Bu L, Fishman GI, Park DS. ETV1 activates a rapid conduction transcriptional program in rodent and human cardiomyocytes. Sci Rep 2018; 8:9944. [PMID: 29967479 PMCID: PMC6028599 DOI: 10.1038/s41598-018-28239-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 06/19/2018] [Indexed: 01/07/2023] Open
Abstract
Rapid impulse propagation is a defining attribute of the pectinated atrial myocardium and His-Purkinje system (HPS) that safeguards against atrial and ventricular arrhythmias, conduction block, and myocardial dyssynchrony. The complex transcriptional circuitry that dictates rapid conduction remains incompletely understood. Here, we demonstrate that ETV1 (ER81)-dependent gene networks dictate the unique electrophysiological characteristics of atrial and His-Purkinje myocytes. Cardiomyocyte-specific deletion of ETV1 results in cardiac conduction abnormalities, decreased expression of rapid conduction genes (Nkx2-5, Gja5, and Scn5a), HPS hypoplasia, and ventricularization of the unique sodium channel properties that define Purkinje and atrial myocytes in the adult heart. Forced expression of ETV1 in postnatal ventricular myocytes (VMs) reveals that ETV1 promotes a HPS gene signature while diminishing ventricular and nodal gene networks. Remarkably, ETV1 induction in human induced pluripotent stem cell-derived cardiomyocytes increases rapid conduction gene expression and inward sodium currents, converting them towards a HPS phenotype. Our data identify a cardiomyocyte-autonomous, ETV1-dependent pathway that is responsible for specification of rapid conduction zones in the heart and demonstrate that ETV1 is sufficient to promote a HPS transcriptional and functional program upon VMs.
Collapse
Affiliation(s)
- Akshay Shekhar
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA
| | - Xianming Lin
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA
| | - Bin Lin
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA
| | - Fang-Yu Liu
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA
| | - Jie Zhang
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA
| | - Alireza Khodadadi-Jamayran
- Center for Health Informatics and Bioinformatics, New York University Langone Health, New York, New York, 10016, USA
| | - Aristotelis Tsirigos
- Center for Health Informatics and Bioinformatics, New York University Langone Health, New York, New York, 10016, USA
| | - Lei Bu
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA
| | - Glenn I Fishman
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA.
| | - David S Park
- Leon H. Charney Division of Cardiology, New York University Langone Health, New York, New York, 10016, USA.
| |
Collapse
|
30
|
Abstract
The generation and propagation of the cardiac impulse is the central function of the cardiac conduction system (CCS). Impulse initiation occurs in nodal tissues that have high levels of automaticity, but slow conduction properties. Rapid impulse propagation is a feature of the ventricular conduction system, which is essential for synchronized contraction of the ventricular chambers. When functioning properly, the CCS produces ~2.4 billion heartbeats during a human lifetime and orchestrates the flow of cardiac impulses, designed to maximize cardiac output. Abnormal impulse initiation or propagation can result in brady- and tachy-arrhythmias, producing an array of symptoms, including syncope, heart failure or sudden cardiac death. Underlying the functional diversity of the CCS are gene regulatory networks that direct cell fate towards a nodal or a fast conduction gene program. In this review, we will discuss our current understanding of the transcriptional networks that dictate the components of the CCS, the growth factor-dependent signaling pathways that orchestrate some of these transcriptional hierarchies and the effect of aberrant transcription factor expression on mammalian conduction disease.
Collapse
|
31
|
Khandekar A, Springer S, Wang W, Hicks S, Weinheimer C, Diaz-Trelles R, Nerbonne JM, Rentschler S. Notch-Mediated Epigenetic Regulation of Voltage-Gated Potassium Currents. Circ Res 2016; 119:1324-1338. [PMID: 27697822 DOI: 10.1161/circresaha.116.309877] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 09/27/2016] [Accepted: 09/30/2016] [Indexed: 12/19/2022]
Abstract
RATIONALE Ventricular arrhythmias often arise from the Purkinje-myocyte junction and are a leading cause of sudden cardiac death. Notch activation reprograms cardiac myocytes to an induced Purkinje-like state characterized by prolonged action potential duration and expression of Purkinje-enriched genes. OBJECTIVE To understand the mechanism by which canonical Notch signaling causes action potential prolongation. METHODS AND RESULTS We find that endogenous Purkinje cells have reduced peak K+ current, Ito, and IK,slow when compared with ventricular myocytes. Consistent with partial reprogramming toward a Purkinje-like phenotype, Notch activation decreases peak outward K+ current density, as well as the outward K+ current components Ito,f and IK,slow. Gene expression studies in Notch-activated ventricles demonstrate upregulation of Purkinje-enriched genes Contactin-2 and Scn5a and downregulation of K+ channel subunit genes that contribute to Ito,f and IK,slow. In contrast, inactivation of Notch signaling results in increased cell size commensurate with increased K+ current amplitudes and mimics physiological hypertrophy. Notch-induced changes in K+ current density are regulated at least in part via transcriptional changes. Chromatin immunoprecipitation demonstrates dynamic RBP-J (recombination signal binding protein for immunoglobulin kappa J region) binding and loss of active histone marks on K+ channel subunit promoters with Notch activation, and similar transcriptional and epigenetic changes occur in a heart failure model. Interestingly, there is a differential response in Notch target gene expression and cellular electrophysiology in left versus right ventricular cardiac myocytes. CONCLUSIONS In summary, these findings demonstrate a novel mechanism for regulation of voltage-gated potassium currents in the setting of cardiac pathology and may provide a novel target for arrhythmia drug design.
Collapse
Affiliation(s)
- Aditi Khandekar
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Steven Springer
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Wei Wang
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Stephanie Hicks
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Carla Weinheimer
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | | | - Jeanne M Nerbonne
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| | - Stacey Rentschler
- Department of Medicine, Cardiovascular Division, Washington University School of Medicine, St. Louis, MO, 63110, USA.,Department of Developmental Biology, Washington University School of Medicine, St. Louis, MO, 63110, USA
| |
Collapse
|