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Shi Q, VandeBerg JL. Experimental approaches to derive CD34+ progenitors from human and nonhuman primate embryonic stem cells. AMERICAN JOURNAL OF STEM CELLS 2015; 4:32-37. [PMID: 25973329 PMCID: PMC4396158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Accepted: 10/07/2014] [Indexed: 06/04/2023]
Abstract
Traditionally, CD34 positive cells are predominantly found in the umbilical cord and bone marrow, thus are considered as hematopoietic progenitors. Increasing evidence has suggested that the CD34+ cells represent a distinct subset of cells with enhanced progenitor activity; CD34 is a general marker of progenitor cells in a variety of cell types. Because the CD34 protein shows expression early on in hematopoietic and vascular-associated tissues, CD34+ cells have enormous potential as cellular agents for research and for clinical cell transplantation. Directed differentiation of embryonic stem cells will give rise to an inexhaustible supply of CD34+ cells, creating an exciting approach for biomedical research and for regenerative medicine. Here, we review the main methods that have been published for the derivation of CD34+ cells from embryonic stem cells; specifically those approaches the human and nonhuman primate stem cells. We summarize current status of this field, compare the methods used, and evaluate the issues in translating the bench science to bedside therapy.
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Affiliation(s)
- Qiang Shi
- Southwest National Primate Research Center, Texas Biomedical Research InstituteSan Antonio, Texas, 78227-5301
| | - John L VandeBerg
- Southwest National Primate Research Center, Texas Biomedical Research InstituteSan Antonio, Texas, 78227-5301
- South Texas Diabetes and Obesity Institute, University of Texas Health Science Center, San Antonio - Regional Academic Health Center80 Fort Brown Street, Brownsville, Texas 78520
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Smith AO, Bowers SLK, Stratman AN, Davis GE. Hematopoietic stem cell cytokines and fibroblast growth factor-2 stimulate human endothelial cell-pericyte tube co-assembly in 3D fibrin matrices under serum-free defined conditions. PLoS One 2013; 8:e85147. [PMID: 24391990 PMCID: PMC3877341 DOI: 10.1371/journal.pone.0085147] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 11/23/2013] [Indexed: 01/12/2023] Open
Abstract
We describe a novel 3D fibrin matrix model using recombinant hematopoietic stem cell cytokines under serum-free defined conditions which promotes the assembly of human endothelial cell (EC) tubes with co-associated pericytes. Individual ECs and pericytes are randomly mixed together and EC tubes form that is accompanied by pericyte recruitment to the EC tube abluminal surface over a 3-5 day period. These morphogenic processes are stimulated by a combination of the hematopoietic stem cell cytokines, stem cell factor, interleukin-3, stromal derived factor-1α, and Flt-3 ligand which are added in conjunction with fibroblast growth factor (FGF)-2 into the fibrin matrix. In contrast, this tube morphogenic response does not occur under serum-free defined conditions when VEGF and FGF-2 are added together in the fibrin matrices. We recently demonstrated that VEGF and FGF-2 are able to prime EC tube morphogenic responses (i.e. added overnight prior to the morphogenic assay) to hematopoietic stem cell cytokines in collagen matrices and, interestingly, they also prime EC tube morphogenesis in 3D fibrin matrices. EC-pericyte interactions in 3D fibrin matrices leads to marked vascular basement membrane assembly as demonstrated using immunofluorescence and transmission electron microscopy. Furthermore, we show that hematopoietic stem cell cytokines and pericytes stimulate EC sprouting in fibrin matrices in a manner dependent on the α5β1 integrin. This novel co-culture system, under serum-free defined conditions, allows for a molecular analysis of EC tube assembly, pericyte recruitment and maturation events in a critical ECM environment (i.e. fibrin matrices) that regulates angiogenic events in postnatal life.
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Affiliation(s)
- Annie O. Smith
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Sciences Center and University of Missouri School of Medicine, Columbia, Missouri, United States of America
| | - Stephanie L. K. Bowers
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Sciences Center and University of Missouri School of Medicine, Columbia, Missouri, United States of America
| | - Amber N. Stratman
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Sciences Center and University of Missouri School of Medicine, Columbia, Missouri, United States of America
| | - George E. Davis
- Department of Medical Pharmacology and Physiology, Dalton Cardiovascular Sciences Center and University of Missouri School of Medicine, Columbia, Missouri, United States of America
- * E-mail:
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Shi Q, Schatten G, Hodara V, Simerly C, VandeBerg JL. Endothelial reconstitution by CD34+ progenitors derived from baboon embryonic stem cells. J Cell Mol Med 2013; 17:242-51. [PMID: 23301772 PMCID: PMC3814022 DOI: 10.1111/jcmm.12002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 11/13/2012] [Indexed: 12/17/2022] Open
Abstract
In this study, we used a large non-human primate model, the baboon, to establish a step-wise protocol to generate CD34+ endothelial progenitor cells (EPCs) from embryonic stem cells (ESCs) and to demonstrate their reparative effects. Baboon ESCs were sequentially differentiated from embryoid body cultures for 9 days and then were specified into EPCs by culturing them in monolayer for 12 days. The resulting EPCs expressed CD34, CXCR4 and UEA-1, but neither CD31 nor CD117. The EPCs were able to form intact lumen structures when seeded on Matrigel, took up Dil-LDL, and responded to TNF-α. Angioblasts specified in EGM-2 medium and ECGS medium had 6.41 ± 1.16% (n = 3) and 9.32 ± 3.73% CD34+ cells (n = 3). The efficiency of generating CD34+ EPCs did not differ significantly from ECGS to EGM-2 culture media, however, angioblasts specified in ECGS medium expressed a higher percentage of CD34+/CXCR4+ cells (3.49 ± 1.32%, n = 3) than those specified in EGM-2 medium (0.49 ± 0.52%, n = 3). To observe their reparative capacity, we purified CD34+ progenitors after specification by EGM-2 medium; inoculated fluorescently labelled CD34+ EPCs into an arterial segment denuded of endothelium in an ex vivo system. After 14 days of ex vivo culture, the grafted cells had attached and integrated to the denuded surface; in addition, they had matured further and expressed terminally differentiated endothelial markers including CD31 and CD146. In conclusion, we have proved that specified CD34+ EPCs are promising therapeutic agents for repairing damaged vasculature.
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Affiliation(s)
- Qiang Shi
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, TX 78245-0549, USA.
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Roura S, Bagó JR, Soler-Botija C, Pujal JM, Gálvez-Montón C, Prat-Vidal C, Llucià-Valldeperas A, Blanco J, Bayes-Genis A. Human umbilical cord blood-derived mesenchymal stem cells promote vascular growth in vivo. PLoS One 2012; 7:e49447. [PMID: 23166670 PMCID: PMC3500294 DOI: 10.1371/journal.pone.0049447] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Accepted: 10/09/2012] [Indexed: 01/01/2023] Open
Abstract
Stem cell therapies are promising strategies to regenerate human injured tissues, including ischemic myocardium. Here, we examined the acquisition of properties associated with vascular growth by human umbilical cord blood-derived mesenchymal stem cells (UCBMSCs), and whether they promoted vascular growth in vivo. UCBMSCs were induced in endothelial cell-specific growth medium (EGM-2) acquiring new cell markers, increased Ac-LDL uptake, and migratory capacity as assessed by qRT-PCR, Western blotting, indirect immunofluorescence, and invasion assays. Angiogenic and vasculogenic potentials could be anticipated by in vitro experiments showing self organization into Matrigel-mediated cell networks, and activation of circulating angiogenic-supportive myeloid cells. In mice, following subcutaneous co-injection with Matrigel, UCBMSCs modified to co-express bioluminescent (luciferases) and fluorescent proteins were demonstrated to participate in the formation of new microvasculature connected with the host circulatory system. Response of UCBMSCs to ischemia was explored in a mouse model of acute myocardial infarction (MI). UCBMSCs transplanted using a fibrin patch survived 4 weeks post-implantation and organized into CD31+network structures above the infarcted myocardium. MI-treated animals showed a reduced infarct scar and a larger vessel-occupied area in comparison with MI-control animals. Taken together, the presented results show that UCBMSCs can be induced in vitro to acquire angiogenic and vasculogenic properties and contribute to vascular growth in vivo.
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Affiliation(s)
- Santiago Roura
- ICREC Research Program, Fundació Institut dInvestigació en Ciències de la Salut Germans Trias i Pujol (IGTP), Badalona, Spain
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Shi Q, Hodara V, Simerly CR, Schatten GP, VandeBerg JL. Ex vivo reconstitution of arterial endothelium by embryonic stem cell-derived endothelial progenitor cells in baboons. Stem Cells Dev 2012; 22:631-42. [PMID: 22931470 DOI: 10.1089/scd.2012.0313] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
There is an increasing need for an animal model that can be used to translate basic research into clinical therapy. We documented the differentiation and functional competence of embryonic stem cell (ESC)-derived endothelial cells in baboons. Baboon angioblasts were sequentially differentiated from embryoid body cultures for 9 days in an angioblast differentiation medium with varying concentrations of BMP-4, FLT-3 ligand, stem cell factor, thrombopoietin, basic fibroblast growth factor (FGF), vascular endothelial growth factor (VEGF), and knockout serum replacement. Real-time polymerase chain reaction results showed that ESC-derived angioblasts downregulated NANOG and OCT3/4, upregulated T-brachyury and GATA2, and moderately expressed CD34; they did not express CD144, TEK, or VWF, and varied in levels of CD31 expression. Several populations of putative angioblasts appeared 3 days and 9 days after differentiation, as identified by flow cytometry. Angioblasts at this stage exhibited dual paths of differentiation toward hematopoietic and vascular fates. To examine whether derived angioblasts could reconstitute the endothelium, we built an ex vivo culture system and seeded fluorescently labeled angioblast cultures onto a denuded segment of the femoral artery. We found that the seeded cells were able to grow into the endothelium on the interior surface of denuded artery segments within 5 days after seeding. After 14 days of ex vivo culture, the transplanted cells expressed CD31, an endothelial marker. The control arteries, seeded with vehicle only, did not harbor cells with endothelial markers. We conclude that ESC-derived angioblasts are promising therapeutic agents for repairing damaged vasculature, and that the baboon model will be vital for optimizing therapies for human clinical studies.
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Affiliation(s)
- Qiang Shi
- Southwest National Primate Research Center, Texas Biomedical Research Institute, San Antonio, Texas 78245-0549, USA.
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Abstract
Understanding the mechanisms that regulate the proliferation and differentiation of human stem and progenitor cells is critically important for the development and optimization of regenerative medicine strategies. For vascular regeneration studies, specifically, a true "vascular stem cell" population has not yet been identified. However, a number of cell types that exist endogenously, or can be generated or propagated ex vivo, function as vascular precursor cells and can participate in and/or promote vascular regeneration. Herein, we provide an overview of what is known about the regulation of their differentiation specifically toward a vascular endothelial cell phenotype.
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Affiliation(s)
- Hera Chaudhury
- Center for Cell and Gene Therapy, Baylor College of Medicine, One Baylor Plaza, Houston, TX, USA
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Abstract
During embryonic development, multilineage HSCs/progenitor cells are derived from specialized endothelial cells, termed hemogenic endothelium, within the yolk sac, placenta, and aorta. Whether hemogenic endothelial cells contribute to blood cell development at other sites of definitive hematopoiesis, such as in the fetal liver and fetal bone marrow, is not known. Also unknown is whether such cells exist within the vasculature of adult bone marrow and generate hematopoietic stem cells after birth. These issues and their clinical relevance are discussed herein.
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Yan B, Abdelli LS, Singla DK. Transplanted Induced Pluripotent Stem Cells Improve Cardiac Function and Induce Neovascularization in the Infarcted Hearts of db/db Mice. Mol Pharm 2011; 8:1602-10. [DOI: 10.1021/mp2003576] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Binbin Yan
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida 32817, United States
| | - Latifa S. Abdelli
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida 32817, United States
| | - Dinender K. Singla
- Burnett School of Biomedical Sciences, College of Medicine, University of Central Florida, Orlando, Florida 32817, United States
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Banerjee S, Dhara SK, Bacanamwo M. Endoglin is a novel endothelial cell specification gene. Stem Cell Res 2011; 8:85-96. [PMID: 22099023 DOI: 10.1016/j.scr.2011.08.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 08/09/2011] [Accepted: 08/22/2011] [Indexed: 01/08/2023] Open
Abstract
Endothelial cells (EC) are important in vasculogenesis and organogenesis during development and in the pathogenesis of cancer and cardiovascular diseases. However, few EC specification factors are known and primary EC production remains inefficient. Based on recent studies implicating endoglin (Eng) in early vascular development and angiogenesis, we hypothesized that Eng may be an EC specification gene. Mouse embryonic stem cells (ESC) were treated with recombinant Eng or a plasmid expressing the Eng ORF, and differentiated in the presence or absence of bone morphogenic protein 4 (BMP4). Expression of the mesoderm and EC marker genes, the known mediators of EC specification and their downstream targets was monitored by quantitative PCR, western blot, immunocytochemistry, and flow cytometry. Functionality of the differentiated EC was assessed by in vitro angiogenesis assay and the induction of Icam1 expression in response to TNF-α treatment. Both recombinant Eng and forced Eng expression increased the number of functional EC expressing the EC marker genes VE-cadherin, vWF, and Tie2, and enhanced the effect of BMP4. The Eng-induced EC differentiation was independent of known mediators of EC specification such as Indian Hedgehog (IHH) and BMP4 or of BMP4/Smad1/5/8 signaling. These studies suggest that Eng is a novel EC specification gene.
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Affiliation(s)
- Saswati Banerjee
- Cardiovascular Research Institute, Morehouse School of Medicine, Atlanta, GA 30310, USA
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Abstract
Myocardial infarction is the leading cause of death among people in industrialized nations. Although the heart has some ability to regenerate after infarction, myocardial restoration is inadequate. Consequently, investigators are currently exploring the use of human embryonic stem cells (hESCs), skeletal myoblasts and adult bone marrow stem cells to limit infarct size. hESCs are pluripotent cells that can regenerate myocardium in infarcted hearts, attenuate heart remodeling and contribute to left ventricle (LV) systolic force development. Since hESCs can form heart teratomas, investigators are differentiating hESCs toward cardiac progenitor cells prior to transplantation into hearts. Large quantities of hESCs cardiac progenitor cells, however, must be generated, immune rejection must be prevented and grafts must survive over the long term to significantly improve myocardial performance. Transplanted autologous skeletal myoblasts can survive in infarcted myocardium in small numbers, proliferate, differentiate into skeletal myofibers and increase the LV ejection fraction. These cells, however, do not form electromechanical connections with host cardiomyocytes. Consequently, electrical re-entry can occur and cause cardiac arrhythmias. Autologous bone marrow mononuclear cells contain hematopoietic and mesenchymal stem cells. In several meta-analyses, patients with coronary disease who received autologous bone marrow cells by intracoronary injection show significant 3.7% (range: 1.9-5.4%) increases in LV ejection fraction, decreases in LV end-systolic volume of -4.8 ml (range: -1.4 to -8.2 ml) and reductions in infarct size of 5.5% (-1.9 to -9.1%), without experiencing arrhythmias. Bone marrow cells appear to release biologically active factors that limit myocardial damage. Unfortunately, bone marrow cells from patients with chronic diseases propagate poorly and can die prematurely. Substantial challenges must be addressed and resolved to advance the use of stem cells in cardiac repair including identifying the optimal stem cell(s) that permit transplantation without requirements for host immune suppression; timing of stem cell transplantation that maximizes chemoattraction of stem cells to infarcts; and determining the optimal technique for injecting stem cells for cardiac repair. Techniques must be developed to enhance survival and propagation of stem cells in the myocardium. These studies will require close cooperation and interaction of scientists and clinicians. Cell-based cardiac repair in the 21st century will offer new hope for millions of patients worldwide with myocardial infarctions who, otherwise, would suffer from the relentless progression of heart disease to heart failure and death.
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Affiliation(s)
- Robert J Henning
- James A. Haley VA Hospital/University of South Florida College of Medicine, Tampa, FL 33612, USA.
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Chen YC, Tsai KL, Hung CW, Ding DC, Chen LH, Chang YL, Chen LK, Chiou SH. Induced pluripotent stem cells and regenerative medicine. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.jcgg.2010.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Illi B, Colussi C, Rosati J, Spallotta F, Nanni S, Farsetti A, Capogrossi MC, Gaetano C. NO points to epigenetics in vascular development. Cardiovasc Res 2011; 90:447-56. [PMID: 21345806 DOI: 10.1093/cvr/cvr056] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Our understanding of epigenetic mechanisms important for embryonic vascular development and cardiovascular differentiation is still in its infancy. Although molecular analyses, including massive genome sequencing and/or in vitro/in vivo targeting of specific gene sets, has led to the identification of multiple factors involved in stemness maintenance or in the early processes of embryonic layers specification, very little is known about the epigenetic commitment to cardiovascular lineages. The object of this review will be to outline the state of the art in this field and trace the perspective therapeutic consequences of studies aimed at elucidating fundamental epigenetic networks. Special attention will be paid to the emerging role of nitric oxide in this field.
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Affiliation(s)
- Barbara Illi
- Mendel Laboratory, IRCCS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy
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