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Salido E, de Medeiros Vieira C, Verdezoto-Mosquera J, Zade R, Miller CL, Sardo VL. The 9p21.3 coronary artery disease risk locus drives vascular smooth muscle cells to osteochondrogenic state. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.05.25.595888. [PMID: 38853913 PMCID: PMC11160673 DOI: 10.1101/2024.05.25.595888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2024]
Abstract
Genome-wide association studies have identified common genetic variants at approximately 300 human genomic loci linked to CAD susceptibility. Among these genomic regions, the most impactful is the 9p21.3 CAD risk locus, which spans a 60 kb gene desert, encompasses about ~80 SNPs in high linkage disequilibrium, and has no defined function. We used induced pluripotent stem cell (iPSC) lines from risk and non-risk donors at 9p21.3, as well as isogenic lines with a full haplotype deletion. iPSC-derived vascular smooth muscle cells (iPSC-VSMCs) were used for single-cell transcriptomics. iPSC-VSMCs resemble the heterogeneity observed in human coronary arteries, establishing the robustness of this model. Our analysis revealed that the 9p21.3 risk haplotype prompts VSMCs to acquire a novel cellular state showing osteochondrogenic features, and we identified a set of signature genes crucial for defining this transcriptional program. Our study provides new insights into the 9p21.3 risk locus and its role in driving disease-prone states in VSMCs.
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Affiliation(s)
- Elsa Salido
- Department of Cell and Regenerative Biology; University of Wisconsin-Madison; Madison, WI 53705 USA
| | | | | | - Rohan Zade
- Department of Cell and Regenerative Biology; University of Wisconsin-Madison; Madison, WI 53705 USA
| | - Clint L Miller
- Department of Public Health Science; University of Virginia; Charlottesville, VA 22904 USA
| | - Valentina Lo Sardo
- Department of Cell and Regenerative Biology; University of Wisconsin-Madison; Madison, WI 53705 USA
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2
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Li Z, Brittan M, Mills NL. A Multimodal Omics Framework to Empower Target Discovery for Cardiovascular Regeneration. Cardiovasc Drugs Ther 2024; 38:223-236. [PMID: 37421484 PMCID: PMC10959818 DOI: 10.1007/s10557-023-07484-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/19/2023] [Indexed: 07/10/2023]
Abstract
Ischaemic heart disease is a global healthcare challenge with high morbidity and mortality. Early revascularisation in acute myocardial infarction has improved survival; however, limited regenerative capacity and microvascular dysfunction often lead to impaired function and the development of heart failure. New mechanistic insights are required to identify robust targets for the development of novel strategies to promote regeneration. Single-cell RNA sequencing (scRNA-seq) has enabled profiling and analysis of the transcriptomes of individual cells at high resolution. Applications of scRNA-seq have generated single-cell atlases for multiple species, revealed distinct cellular compositions for different regions of the heart, and defined multiple mechanisms involved in myocardial injury-induced regeneration. In this review, we summarise findings from studies of healthy and injured hearts in multiple species and spanning different developmental stages. Based on this transformative technology, we propose a multi-species, multi-omics, meta-analysis framework to drive the discovery of new targets to promote cardiovascular regeneration.
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Affiliation(s)
- Ziwen Li
- BHF Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK.
| | - Mairi Brittan
- BHF Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Nicholas L Mills
- BHF Centre for Cardiovascular Science, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
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3
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Osinski V, Yellamilli A, Firulyova MM, Zhang MJ, Peck A, Auger JL, Faragher JL, Marath A, Voeller RK, O’Connell TD, Zaitsev K, Binstadt BA. Profibrotic VEGFR3-Dependent Lymphatic Vessel Growth in Autoimmune Valvular Carditis. Arterioscler Thromb Vasc Biol 2024; 44:807-821. [PMID: 38269589 PMCID: PMC10978259 DOI: 10.1161/atvbaha.123.320326] [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: 10/25/2023] [Accepted: 01/11/2024] [Indexed: 01/26/2024]
Abstract
BACKGROUND Rheumatic heart disease is the major cause of valvular heart disease in developing nations. Endothelial cells (ECs) are considered crucial contributors to rheumatic heart disease, but greater insight into their roles in disease progression is needed. METHODS We used a Cdh5-driven EC lineage-tracing approach to identify and track ECs in the K/B.g7 model of autoimmune valvular carditis. Single-cell RNA sequencing was used to characterize the EC populations in control and inflamed mitral valves. Immunostaining and conventional histology were used to evaluate lineage tracing and validate single-cell RNA-sequencing findings. The effects of VEGFR3 (vascular endothelial growth factor receptor 3) and VEGF-C (vascular endothelial growth factor C) inhibitors were tested in vivo. The functional impact of mitral valve disease in the K/B.g7 mouse was evaluated using echocardiography. Finally, to translate our findings, we analyzed valves from human patients with rheumatic heart disease undergoing mitral valve replacements. RESULTS Lineage tracing in K/B.g7 mice revealed new capillary lymphatic vessels arising from valve surface ECs during the progression of disease in K/B.g7 mice. Unsupervised clustering of mitral valve single-cell RNA-sequencing data revealed novel lymphatic valve ECs that express a transcriptional profile distinct from other valve EC populations including the recently identified PROX1 (Prospero homeobox protein 1)+ lymphatic valve ECs. During disease progression, these newly identified lymphatic valve ECs expand and upregulate a profibrotic transcriptional profile. Inhibiting VEGFR3 through multiple approaches prevented expansion of this mitral valve lymphatic network. Echocardiography demonstrated that K/B.g7 mice have left ventricular dysfunction and mitral valve stenosis. Valve lymphatic density increased with age in K/B.g7 mice and correlated with worsened ventricular dysfunction. Importantly, human rheumatic valves contained similar lymphatics in greater numbers than nonrheumatic controls. CONCLUSIONS These studies reveal a novel mode of inflammation-associated, VEGFR3-dependent postnatal lymphangiogenesis in murine autoimmune valvular carditis, with similarities to human rheumatic heart disease.
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Affiliation(s)
- Victoria Osinski
- Department of Pediatrics and Center for Immunology, University of Minnesota, Minneapolis, MN
| | - Amritha Yellamilli
- Department of Pediatrics, Stanford School of Medicine, Palo Alto, CA
- Medical Scientist Training Program, University of Minnesota, Minneapolis, MN
| | - Maria M. Firulyova
- Almazov National Medical Research Centre, Saint-Petersburg, Russia
- Computer Technologies Laboratory, ITMO University, Saint Petersburg, Russia
| | - Michael J. Zhang
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN
- Cardiovascular Division, Department of Medicine, University of Minnesota, Minneapolis, MN
| | - Alyssa Peck
- Department of Pediatrics and Center for Immunology, University of Minnesota, Minneapolis, MN
| | - Jennifer L. Auger
- Department of Pediatrics and Center for Immunology, University of Minnesota, Minneapolis, MN
| | - Jessica L. Faragher
- Department of Pediatrics and Center for Immunology, University of Minnesota, Minneapolis, MN
| | | | | | - Timothy D. O’Connell
- Department of Integrative Biology and Physiology, University of Minnesota, Minneapolis, MN
| | - Konstantin Zaitsev
- Computer Technologies Laboratory, ITMO University, Saint Petersburg, Russia
| | - Bryce A. Binstadt
- Department of Pediatrics and Center for Immunology, University of Minnesota, Minneapolis, MN
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4
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Arolkar G, Kumar SK, Wang H, Gonzalez KM, Kumar S, Bishnoi B, Rios Coronado PE, Woo YJ, Red-Horse K, Das S. Dedifferentiation and Proliferation of Artery Endothelial Cells Drive Coronary Collateral Development in Mice. Arterioscler Thromb Vasc Biol 2023; 43:1455-1477. [PMID: 37345524 PMCID: PMC10364966 DOI: 10.1161/atvbaha.123.319319] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 06/08/2023] [Indexed: 06/23/2023]
Abstract
BACKGROUND Collateral arteries act as natural bypasses which reroute blood flow to ischemic regions and facilitate tissue regeneration. In an injured heart, neonatal artery endothelial cells orchestrate a systematic series of cellular events, which includes their outward migration, proliferation, and coalescence into fully functional collateral arteries. This process, called artery reassembly, aids complete cardiac regeneration in neonatal hearts but is absent in adults. The reason for this age-dependent disparity in artery cell response is completely unknown. In this study, we investigated if regenerative potential of coronary arteries is dictated by their ability to dedifferentiate. METHODS Single-cell RNA sequencing of coronary endothelial cells was performed to identify differences in molecular profiles of neonatal and adult endothelial cells in mice. Findings from this in silico analyses were confirmed with in vivo experiments using genetic lineage tracing, whole organ immunostaining, confocal imaging, and cardiac functional assays in mice. RESULTS Upon coronary occlusion, neonates showed a significant increase in actively cycling artery cells and expressed prominent dedifferentiation markers. Data from in silico pathway analyses and in vivo experiments suggested that upon myocardial infarction, cell cycle reentry of preexisting neonatal artery cells, the subsequent collateral artery formation, and recovery of cardiac function are dependent on arterial VegfR2 (vascular endothelial growth factor receptor-2). This subpopulation of dedifferentiated and proliferating artery cells was absent in nonregenerative postnatal day 7 or adult hearts. CONCLUSIONS These data indicate that adult artery endothelial cells fail to drive collateral artery development due to their limited ability to dedifferentiate and proliferate.
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Affiliation(s)
- Gauri Arolkar
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, India (G.A., S.K.K., S.K., B.B., S.D.)
| | - Sneha K. Kumar
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, India (G.A., S.K.K., S.K., B.B., S.D.)
| | - Hanjay Wang
- Department of Cardiothoracic Surgery (H.W., Y.J.W.), Stanford University School of Medicine, CA
| | - Karen M. Gonzalez
- Institute for Stem Cell Biology and Regenerative Medicine (K.M.G., K.R.-H.), Stanford University School of Medicine, CA
- Department of Biology (K.M.G., K.R.-H.), Stanford University, CA
| | - Suraj Kumar
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, India (G.A., S.K.K., S.K., B.B., S.D.)
| | - Bhavnesh Bishnoi
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, India (G.A., S.K.K., S.K., B.B., S.D.)
| | | | - Y. Joseph Woo
- Department of Cardiothoracic Surgery (H.W., Y.J.W.), Stanford University School of Medicine, CA
| | - Kristy Red-Horse
- Institute for Stem Cell Biology and Regenerative Medicine (K.M.G., K.R.-H.), Stanford University School of Medicine, CA
- Department of Biology (K.M.G., K.R.-H.), Stanford University, CA
- Howard Hughes Medical Institute, Chevy Chase, MD (K.R.-H.)
| | - Soumyashree Das
- National Centre for Biological Sciences, Tata Institute of Fundamental Research, Bengaluru, India (G.A., S.K.K., S.K., B.B., S.D.)
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Dudley AC, Griffioen AW. Pathological angiogenesis: mechanisms and therapeutic strategies. Angiogenesis 2023; 26:313-347. [PMID: 37060495 PMCID: PMC10105163 DOI: 10.1007/s10456-023-09876-7] [Citation(s) in RCA: 70] [Impact Index Per Article: 70.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 03/26/2023] [Indexed: 04/16/2023]
Abstract
In multicellular organisms, angiogenesis, the formation of new blood vessels from pre-existing ones, is an essential process for growth and development. Different mechanisms such as vasculogenesis, sprouting, intussusceptive, and coalescent angiogenesis, as well as vessel co-option, vasculogenic mimicry and lymphangiogenesis, underlie the formation of new vasculature. In many pathological conditions, such as cancer, atherosclerosis, arthritis, psoriasis, endometriosis, obesity and SARS-CoV-2(COVID-19), developmental angiogenic processes are recapitulated, but are often done so without the normal feedback mechanisms that regulate the ordinary spatial and temporal patterns of blood vessel formation. Thus, pathological angiogenesis presents new challenges yet new opportunities for the design of vascular-directed therapies. Here, we provide an overview of recent insights into blood vessel development and highlight novel therapeutic strategies that promote or inhibit the process of angiogenesis to stabilize, reverse, or even halt disease progression. In our review, we will also explore several additional aspects (the angiogenic switch, hypoxia, angiocrine signals, endothelial plasticity, vessel normalization, and endothelial cell anergy) that operate in parallel to canonical angiogenesis mechanisms and speculate how these processes may also be targeted with anti-angiogenic or vascular-directed therapies.
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Affiliation(s)
- Andrew C Dudley
- Department of Microbiology, Immunology and Cancer Biology, The University of Virginia, Charlottesville, VA, 22908, USA.
| | - Arjan W Griffioen
- Angiogenesis Laboratory, Department of Medical Oncology, Amsterdam UMC, Cancer Center Amsterdam, Amsterdam, The Netherlands.
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6
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Abstract
Vascular endothelial cells form the inner layer of blood vessels where they have a key role in the development and maintenance of the functional circulatory system and provide paracrine support to surrounding non-vascular cells. Technical advances in the past 5 years in single-cell genomics and in in vivo genetic labelling have facilitated greater insights into endothelial cell development, plasticity and heterogeneity. These advances have also contributed to a new understanding of the timing of endothelial cell subtype differentiation and its relationship to the cell cycle. Identification of novel tissue-specific gene expression patterns in endothelial cells has led to the discovery of crucial signalling pathways and new interactions with other cell types that have key roles in both tissue maintenance and disease pathology. In this Review, we describe the latest findings in vascular endothelial cell development and diversity, which are often supported by large-scale, single-cell studies, and discuss the implications of these findings for vascular medicine. In addition, we highlight how techniques such as single-cell multimodal omics, which have become increasingly sophisticated over the past 2 years, are being utilized to study normal vascular physiology as well as functional perturbations in disease.
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Affiliation(s)
- Emily Trimm
- Stanford Medical Scientist Training Program, Stanford University School of Medicine, Stanford, CA, USA
- Stanford Biophysics Program, Stanford University School of Medicine, Stanford, CA, USA
| | - Kristy Red-Horse
- Department of Biology, Stanford University, Stanford, CA, USA.
- Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.
- Howard Hughes Medical Institute, Stanford University, Stanford, CA, USA.
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7
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Wang T, Chen X, Wang K, Ju J, Yu X, Wang S, Liu C, Wang K. Cre-loxP-mediated genetic lineage tracing: Unraveling cell fate and origin in the developing heart. Front Cardiovasc Med 2023; 10:1085629. [PMID: 36923960 PMCID: PMC10008892 DOI: 10.3389/fcvm.2023.1085629] [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: 10/31/2022] [Accepted: 02/08/2023] [Indexed: 03/03/2023] Open
Abstract
The Cre-loxP-mediated genetic lineage tracing system is essential for constructing the fate mapping of single-cell progeny or cell populations. Understanding the structural hierarchy of cardiac progenitor cells facilitates unraveling cell fate and origin issues in cardiac development. Several prospective Cre-loxP-based lineage-tracing systems have been used to analyze precisely the fate determination and developmental characteristics of endocardial cells (ECs), epicardial cells, and cardiomyocytes. Therefore, emerging lineage-tracing techniques advance the study of cardiovascular-related cellular plasticity. In this review, we illustrate the principles and methods of the emerging Cre-loxP-based genetic lineage tracing technology for trajectory monitoring of distinct cell lineages in the heart. The comprehensive demonstration of the differentiation process of single-cell progeny using genetic lineage tracing technology has made outstanding contributions to cardiac development and homeostasis, providing new therapeutic strategies for tissue regeneration in congenital and cardiovascular diseases (CVDs).
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Affiliation(s)
- Tao Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Xinzhe Chen
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Kai Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Jie Ju
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Xue Yu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Shaocong Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Cuiyun Liu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
| | - Kun Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao, China
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8
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D'Amato G, Phansalkar R, Naftaly JA, Fan X, Amir ZA, Rios Coronado PE, Cowley DO, Quinn KE, Sharma B, Caron KM, Vigilante A, Red-Horse K. Endocardium-to-coronary artery differentiation during heart development and regeneration involves sequential roles of Bmp2 and Cxcl12/Cxcr4. Dev Cell 2022; 57:2517-2532.e6. [PMID: 36347256 PMCID: PMC9833645 DOI: 10.1016/j.devcel.2022.10.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 07/28/2022] [Accepted: 10/18/2022] [Indexed: 11/09/2022]
Abstract
Endocardial cells lining the heart lumen are coronary vessel progenitors during embryogenesis. Re-igniting this developmental process in adults could regenerate blood vessels lost during cardiac injury, but this requires additional knowledge of molecular mechanisms. Here, we use mouse genetics and scRNA-seq to identify regulators of endocardial angiogenesis and precisely assess the role of CXCL12/CXCR4 signaling. Time-specific lineage tracing demonstrated that endocardial cells differentiated into coronary endothelial cells primarily at mid-gestation. A new mouse line reporting CXCR4 activity-along with cell-specific gene deletions-demonstrated it was specifically required for artery morphogenesis rather than angiogenesis. Integrating scRNA-seq data of endocardial-derived coronary vessels from mid- and late-gestation identified a Bmp2-expressing transitioning population specific to mid-gestation. Bmp2 stimulated endocardial angiogenesis in vitro and in injured neonatal mouse hearts. Our data demonstrate how understanding the molecular mechanisms underlying endocardial angiogenesis can identify new potential therapeutic targets promoting revascularization of the injured heart.
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Affiliation(s)
- Gaetano D'Amato
- Department of Biology, Stanford University, Stanford, CA, USA
| | - Ragini Phansalkar
- Department of Biology, Stanford University, Stanford, CA, USA; Department of Genetics, Stanford University School of Medicine, Stanford, CA, USA
| | | | - Xiaochen Fan
- Department of Biology, Stanford University, Stanford, CA, USA
| | - Zhainib A Amir
- Department of Biology, Stanford University, Stanford, CA, USA
| | | | - Dale O Cowley
- Animal Models Core, University of North Carolina, Chapel Hill, NC, USA
| | - Kelsey E Quinn
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Bikram Sharma
- Department of Biology, Ball State University, Muncie, IN, USA
| | - Kathleen M Caron
- Department of Cell Biology and Physiology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Alessandra Vigilante
- Centre for Stem Cells and Regenerative Medicine & Institute for Liver Studies, King's College London, London, UK
| | - Kristy Red-Horse
- Department of Biology, Stanford University, Stanford, CA, USA; Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA; Howard Hughes Medical Institute, Stanford, CA, USA.
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9
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Asrar H, Tucker AS. Endothelial cells during craniofacial development: Populating and patterning the head. Front Bioeng Biotechnol 2022; 10:962040. [PMID: 36105604 PMCID: PMC9465086 DOI: 10.3389/fbioe.2022.962040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 07/28/2022] [Indexed: 11/26/2022] Open
Abstract
Major organs and tissues require close association with the vasculature during development and for later function. Blood vessels are essential for efficient gas exchange and for providing metabolic sustenance to individual cells, with endothelial cells forming the basic unit of this complex vascular framework. Recent research has revealed novel roles for endothelial cells in mediating tissue morphogenesis and differentiation during development, providing an instructive role to shape the tissues as they form. This highlights the importance of providing a vasculature when constructing tissues and organs for tissue engineering. Studies in various organ systems have identified important signalling pathways crucial for regulating the cross talk between endothelial cells and their environment. This review will focus on the origin and migration of craniofacial endothelial cells and how these cells influence the development of craniofacial tissues. For this we will look at research on the interaction with the cranial neural crest, and individual organs such as the salivary glands, teeth, and jaw. Additionally, we will investigate the methods used to understand and manipulate endothelial networks during the development of craniofacial tissues, highlighting recent advances in this area.
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10
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Phansalkar R, Red-Horse K. A new resource for human coronary vessel development. Cardiovasc Res 2022; 118:2875-2876. [PMID: 35726909 DOI: 10.1093/cvr/cvac094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 04/13/2022] [Accepted: 04/20/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Kristy Red-Horse
- Department of Biology, Stanford University, Stanford, CA 94305, USA.,Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA 94305, USA
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11
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Tian X, Zhou B. Coronary vessel formation in development and regeneration: origins and mechanisms. J Mol Cell Cardiol 2022; 167:67-82. [DOI: 10.1016/j.yjmcc.2022.03.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 03/12/2022] [Accepted: 03/22/2022] [Indexed: 10/18/2022]
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12
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McCracken IR, Dobie R, Bennett M, Passi R, Beqqali A, Henderson NC, Mountford JC, Riley PR, Ponting CP, Smart N, Brittan M, Baker AH. Mapping the developing human cardiac endothelium at single-cell resolution identifies MECOM as a regulator of arteriovenous gene expression. Cardiovasc Res 2022; 118:2960-2972. [PMID: 35212715 PMCID: PMC9648824 DOI: 10.1093/cvr/cvac023] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 02/24/2022] [Indexed: 11/25/2022] Open
Abstract
AIMS Coronary vasculature formation is a critical event during cardiac development, essential for heart function throughout perinatal and adult life. However, current understanding of coronary vascular development has largely been derived from transgenic mouse models. The aim of this study was to characterize the transcriptome of the human foetal cardiac endothelium using single-cell RNA sequencing (scRNA-seq) to provide critical new insights into the cellular heterogeneity and transcriptional dynamics that underpin endothelial specification within the vasculature of the developing heart. METHODS AND RESULTS We acquired scRNA-seq data of over 10 000 foetal cardiac endothelial cells (ECs), revealing divergent EC subtypes including endocardial, capillary, venous, arterial, and lymphatic populations. Gene regulatory network analyses predicted roles for SMAD1 and MECOM in determining the identity of capillary and arterial populations, respectively. Trajectory inference analysis suggested an endocardial contribution to the coronary vasculature and subsequent arterialization of capillary endothelium accompanied by increasing MECOM expression. Comparative analysis of equivalent data from murine cardiac development demonstrated that transcriptional signatures defining endothelial subpopulations are largely conserved between human and mouse. Comprehensive characterization of the transcriptional response to MECOM knockdown in human embryonic stem cell-derived EC (hESC-EC) demonstrated an increase in the expression of non-arterial markers, including those enriched in venous EC. CONCLUSIONS scRNA-seq of the human foetal cardiac endothelium identified distinct EC populations. A predicted endocardial contribution to the developing coronary vasculature was identified, as well as subsequent arterial specification of capillary EC. Loss of MECOM in hESC-EC increased expression of non-arterial markers, suggesting a role in maintaining arterial EC identity.
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Affiliation(s)
- Ian R McCracken
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh EH16 4TJ, UK,Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford OX1 3PT, UK
| | - Ross Dobie
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Matthew Bennett
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Rainha Passi
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Abdelaziz Beqqali
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh EH16 4TJ, UK
| | - Neil C Henderson
- Centre for Inflammation Research, University of Edinburgh, Edinburgh EH16 4TJ, UK,MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh EH4 2XU, UK
| | | | - Paul R Riley
- Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford OX1 3PT, UK
| | - Chris P Ponting
- MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh EH4 2XU, UK
| | - Nicola Smart
- Department of Physiology, Anatomy, and Genetics, University of Oxford, Oxford OX1 3PT, UK
| | - Mairi Brittan
- Centre for Cardiovascular Science, University of Edinburgh, Edinburgh EH16 4TJ, UK
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