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Hogan BM, Schulte-Merker S. How to Plumb a Pisces: Understanding Vascular Development and Disease Using Zebrafish Embryos. Dev Cell 2017; 42:567-583. [PMID: 28950100 DOI: 10.1016/j.devcel.2017.08.015] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 08/01/2017] [Accepted: 08/21/2017] [Indexed: 01/09/2023]
Abstract
Our vasculature plays diverse and critical roles in homeostasis and disease. In recent decades, the use of zebrafish has driven our understanding of vascular development into new areas, identifying new genes and mechanisms controlling vessel formation and allowing unprecedented observation of the cellular and molecular events that shape the developing vasculature. Here, we highlight key mechanisms controlling formation of the zebrafish vasculature and investigate how knowledge from this highly tractable model system has informed our understanding of vascular disease in humans.
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Affiliation(s)
- Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, 306 Carmody Road, St Lucia, Brisbane, QLD 4072, Australia.
| | - Stefan Schulte-Merker
- Institute for Cardiovascular Organogenesis and Regeneration, Faculty of Medicine, WWU Münster, Münster 48149, Germany; Cells-in-Motion Cluster of Excellence (EXC-1003), WWU Münster, 48149 Münster, Germany.
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52
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Peters EB. Endothelial Progenitor Cells for the Vascularization of Engineered Tissues. TISSUE ENGINEERING PART B-REVIEWS 2017; 24:1-24. [PMID: 28548628 DOI: 10.1089/ten.teb.2017.0127] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Self-assembled microvasculature from cocultures of endothelial cells (ECs) and stromal cells has significantly advanced efforts to vascularize engineered tissues by enhancing perfusion rates in vivo and producing investigative platforms for microvascular morphogenesis in vitro. However, to clinically translate prevascularized constructs, the issue of EC source must be resolved. Endothelial progenitor cells (EPCs) can be noninvasively supplied from the recipient through adult peripheral and umbilical cord blood, as well as derived from induced pluripotent stem cells, alleviating antigenicity issues. EPCs can also differentiate into all tissue endothelium, and have demonstrated potential for therapeutic vascularization. Yet, EPCs are not the standard EC choice to vascularize tissue constructs in vitro. Possible reasons include unresolved issues with EPC identity and characterization, as well as uncertainty in the selection of coculture, scaffold, and culture media combinations that promote EPC microvessel formation. This review addresses these issues through a summary of EPC vascular biology and the effects of tissue engineering design parameters upon EPC microvessel formation. Also included are perspectives to integrate EPCs with emerging technologies to produce functional, organotypic vascularized tissues.
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Affiliation(s)
- Erica B Peters
- Department of Chemical and Biological Engineering, University of Colorado , Boulder, Colorado
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53
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Ronca R, Benkheil M, Mitola S, Struyf S, Liekens S. Tumor angiogenesis revisited: Regulators and clinical implications. Med Res Rev 2017. [PMID: 28643862 DOI: 10.1002/med.21452] [Citation(s) in RCA: 124] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Since Judah Folkman hypothesized in 1971 that angiogenesis is required for solid tumor growth, numerous studies have been conducted to unravel the angiogenesis process, analyze its role in primary tumor growth, metastasis and angiogenic diseases, and to develop inhibitors of proangiogenic factors. These studies have led in 2004 to the approval of the first antiangiogenic agent (bevacizumab, a humanized antibody targeting vascular endothelial growth factor) for the treatment of patients with metastatic colorectal cancer. This approval launched great expectations for the use of antiangiogenic therapy for malignant diseases. However, these expectations have not been met and, as knowledge of blood vessel formation accumulates, many of the original paradigms no longer hold. Therefore, the regulators and clinical implications of angiogenesis need to be revisited. In this review, we discuss recently identified angiogenesis mediators and pathways, new concepts that have emerged over the past 10 years, tumor resistance and toxicity associated with the use of currently available antiangiogenic treatment and potentially new targets and/or approaches for malignant and nonmalignant neovascular diseases.
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Affiliation(s)
- Roberto Ronca
- Experimental Oncology and Immunology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Mohammed Benkheil
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Leuven, Belgium
| | - Stefania Mitola
- Experimental Oncology and Immunology, Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Sofie Struyf
- Laboratory of Molecular Immunology, Rega Institute for Medical Research, Leuven, Belgium
| | - Sandra Liekens
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Leuven, Belgium
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The CUL3-SPOP-DAXX axis is a novel regulator of VEGFR2 expression in vascular endothelial cells. Sci Rep 2017; 7:42845. [PMID: 28216678 PMCID: PMC5317005 DOI: 10.1038/srep42845] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 01/16/2017] [Indexed: 01/13/2023] Open
Abstract
Vascular endothelial cell growth factor receptor 2 (VEGFR2) is an essential receptor for the homeostasis of endothelial cells. In this study, we showed that NEDD8-conjugated Cullin3 (CUL3)-based ubiquitin E3 (UbE3) ligase plays a crucial role in VEGFR2 mRNA expression. Human umbilical vein endothelial cells treated with MLN4924, an inhibitor of NEDD8-activating enzyme, or with CUL3 siRNA drastically lost their response to VEGF due to the intense decrease in VEGFR2 expression. Moreover, speckle-type POZ protein (SPOP) and death-domain associated protein (DAXX) were involved in the CUL3 UbE3 ligase complex as a substrate adaptor and a substrate, respectively. Knockdown of SPOP and CUL3 led to the upregulation of DAXX protein and downregulation of VEGFR2 levels. These levels were inversely correlated with one another. In addition, simultaneous knockdown of SPOP and DAXX completely reversed the downregulation of VEGFR2 levels. Moreover, the CUL3-SPOP-DAXX axis had the same effects on NOTCH1, DLL4 and NRP1 expression. Taken together, these findings suggest that the CUL3-SPOP-DAXX axis plays a very important role in endothelial cell function by targeting key angiogenic regulators.
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55
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Bower NI, Vogrin AJ, Le Guen L, Chen H, Stacker SA, Achen MG, Hogan BM. Vegfd modulates both angiogenesis and lymphangiogenesis during zebrafish embryonic development. Development 2017; 144:507-518. [PMID: 28087639 DOI: 10.1242/dev.146969] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Accepted: 12/19/2016] [Indexed: 12/12/2022]
Abstract
Vascular endothelial growth factors (VEGFs) control angiogenesis and lymphangiogenesis during development and in pathological conditions. In the zebrafish trunk, Vegfa controls the formation of intersegmental arteries by primary angiogenesis and Vegfc is essential for secondary angiogenesis, giving rise to veins and lymphatics. Vegfd has been largely thought of as dispensable for vascular development in vertebrates. Here, we generated a zebrafish vegfd mutant by genome editing. vegfd mutants display significant defects in facial lymphangiogenesis independent of vegfc function. Strikingly, we find that vegfc and vegfd cooperatively control lymphangiogenesis throughout the embryo, including during the formation of the trunk lymphatic vasculature. Interestingly, we find that vegfd and vegfc also redundantly drive artery hyperbranching phenotypes observed upon depletion of Flt1 or Dll4. Epistasis and biochemical binding assays suggest that, during primary angiogenesis, Vegfd influences these phenotypes through Kdr (Vegfr2) rather than Flt4 (Vegfr3). These data demonstrate that, rather than being dispensable during development, Vegfd plays context-specific indispensable and also compensatory roles during both blood vessel angiogenesis and lymphangiogenesis.
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Affiliation(s)
- Neil I Bower
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Adam J Vogrin
- Tumour Angiogenesis and Microenvironment Program, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia
| | - Ludovic Le Guen
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Huijun Chen
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Steven A Stacker
- Tumour Angiogenesis and Microenvironment Program, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Marc G Achen
- Tumour Angiogenesis and Microenvironment Program, Peter MacCallum Cancer Centre, Melbourne, Victoria 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Benjamin M Hogan
- Division of Genomics of Development and Disease, Institute for Molecular Bioscience, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
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56
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Neuronal sFlt1 and Vegfaa determine venous sprouting and spinal cord vascularization. Nat Commun 2017; 8:13991. [PMID: 28071661 PMCID: PMC5234075 DOI: 10.1038/ncomms13991] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 11/17/2016] [Indexed: 02/07/2023] Open
Abstract
Formation of organ-specific vasculatures requires cross-talk between developing tissue and specialized endothelial cells. Here we show how developing zebrafish spinal cord neurons coordinate vessel growth through balancing of neuron-derived Vegfaa, with neuronal sFlt1 restricting Vegfaa-Kdrl mediated angiogenesis at the neurovascular interface. Neuron-specific loss of flt1 or increased neuronal vegfaa expression promotes angiogenesis and peri-neural tube vascular network formation. Combining loss of neuronal flt1 with gain of vegfaa promotes sprout invasion into the neural tube. On loss of neuronal flt1, ectopic sprouts emanate from veins involving special angiogenic cell behaviours including nuclear positioning and a molecular signature distinct from primary arterial or secondary venous sprouting. Manipulation of arteriovenous identity or Notch signalling established that ectopic sprouting in flt1 mutants requires venous endothelium. Conceptually, our data suggest that spinal cord vascularization proceeds from veins involving two-tiered regulation of neuronal sFlt1 and Vegfaa via a novel sprouting mode. The generation of vasculature in organs is regulated by cross-talk between the developing tissue and specialized endothelial cells. Here, the authors show that vessel growth feeding the zebrafish spinal cord is coordinated by balancing neuron-derived pro-angiogenic ligand Vegfaa and its receptor, sFlt1.
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57
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58
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Matsuoka RL, Marass M, Avdesh A, Helker CS, Maischein HM, Grosse AS, Kaur H, Lawson ND, Herzog W, Stainier DY. Radial glia regulate vascular patterning around the developing spinal cord. eLife 2016; 5:20253. [PMID: 27852438 PMCID: PMC5123865 DOI: 10.7554/elife.20253] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/16/2016] [Indexed: 12/23/2022] Open
Abstract
Vascular networks surrounding individual organs are important for their development, maintenance, and function; however, how these networks are assembled remains poorly understood. Here we show that CNS progenitors, referred to as radial glia, modulate vascular patterning around the spinal cord by acting as negative regulators. We found that radial glia ablation in zebrafish embryos leads to excessive sprouting of the trunk vessels around the spinal cord, and exclusively those of venous identity. Mechanistically, we determined that radial glia control this process via the Vegf decoy receptor sFlt1: sflt1 mutants exhibit the venous over-sprouting observed in radial glia-ablated larvae, and sFlt1 overexpression rescues it. Genetic mosaic analyses show that sFlt1 function in trunk endothelial cells can limit their over-sprouting. Together, our findings identify CNS-resident progenitors as critical angiogenic regulators that determine the precise patterning of the vasculature around the spinal cord, providing novel insights into vascular network formation around developing organs. DOI:http://dx.doi.org/10.7554/eLife.20253.001
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Affiliation(s)
- Ryota L Matsuoka
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Michele Marass
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Avdesh Avdesh
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Christian Sm Helker
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Hans-Martin Maischein
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Ann S Grosse
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, United States
| | - Harmandeep Kaur
- Department of Pharmacology, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
| | - Nathan D Lawson
- Department of Molecular, Cell and Cancer Biology, University of Massachusetts Medical School, Worcester, United States
| | - Wiebke Herzog
- Cells-in-Motion Cluster of Excellence, University of Muenster, Muenster, Germany.,Max Planck Institute for Molecular Biomedicine, Muenster, Germany
| | - Didier Yr Stainier
- Department of Developmental Genetics, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
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59
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Qi J, Dong Z, Shi Y, Wang X, Qin Y, Wang Y, Liu D. NgAgo-based fabp11a gene knockdown causes eye developmental defects in zebrafish. Cell Res 2016; 26:1349-1352. [PMID: 27834346 PMCID: PMC5143420 DOI: 10.1038/cr.2016.134] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Jialing Qi
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
| | - Zhangji Dong
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
| | - Yunwei Shi
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
| | - Xin Wang
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
| | - Yinyin Qin
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
| | - Yongming Wang
- The State Key Laboratory of Genetic Engineering and MOE Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Dong Liu
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, China
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60
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Shi YW, Yuan W, Wang X, Gong J, Zhu SX, Chai LL, Qi JL, Qin YY, Gao Y, Zhou YL, Fan XL, Ji CY, Wu JY, Wang ZW, Liu D. Combretastatin A-4 efficiently inhibits angiogenesis and induces neuronal apoptosis in zebrafish. Sci Rep 2016; 6:30189. [PMID: 27452835 PMCID: PMC4958954 DOI: 10.1038/srep30189] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 06/30/2016] [Indexed: 12/11/2022] Open
Abstract
Cis-stilbene combretastatin A-4 (CA-4) and a large group of its derivant compounds have been shown significant anti-angiogenesis activity. However the side effects even the toxicities of these chemicals were not evaluated adequately. The zebrafish model has become an important vertebrate model for evaluating drug effects. The testing of CA-4 on zebrafish is so far lacking and assessment of CA-4 on this model will provide with new insights of understanding the function of CA-4 on angiogenesis, the toxicities and side effects of CA-4. We discovered that 7-9 ng/ml CA-4 treatments resulted in developmental retardation and morphological malformation, and led to potent angiogenic defects in zebrafish embryos. Next, we demonstrated that intraperitoneal injection of 5, 10 and 20 mg/kg CA-4 obviously inhibited vessel plexus formation in regenerated pectoral fins of adult zebrafish. Interestingly, we proved that CA-4 treatment induced significant cell apoptosis in central nervous system of zebrafish embryos and adults. Furthermore, it was demonstrated that the neuronal apoptosis induced by CA-4 treatment was alleviated in p53 mutants. In addition, notch1a was up-regulated in CA-4 treated embryos, and inhibition of Notch signaling by DAPT partially rescued the apoptosis in zebrafish central nervous system caused by CA-4.
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Affiliation(s)
- Yun-Wei Shi
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Wei Yuan
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Xin Wang
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Jie Gong
- School of life science, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Shun-Xing Zhu
- Laboratory Animal Center, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Lin-Lin Chai
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Jia-Ling Qi
- School of medicine, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Yin-Yin Qin
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Yu Gao
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Yu-Ling Zhou
- School of medicine, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Xiao-Le Fan
- School of medicine, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Chun-Ya Ji
- School of medicine, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Jia-Yi Wu
- School of medicine, Nantong University, Nantong, Jiangsu 226001, PRC
| | - Zhi-Wei Wang
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC.,Department of Pharmacology, University of California, Irvine, CA 92697, USA
| | - Dong Liu
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Nantong, Jiangsu 226001, PRC
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61
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Chappell JC, Cluceru JG, Nesmith JE, Mouillesseaux KP, Bradley VB, Hartland CM, Hashambhoy-Ramsay YL, Walpole J, Peirce SM, Mac Gabhann F, Bautch VL. Flt-1 (VEGFR-1) coordinates discrete stages of blood vessel formation. Cardiovasc Res 2016; 111:84-93. [PMID: 27142980 DOI: 10.1093/cvr/cvw091] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Accepted: 03/03/2016] [Indexed: 01/09/2023] Open
Abstract
AIMS In developing blood vessel networks, the overall level of vessel branching often correlates with angiogenic sprout initiations, but in some pathological situations, increased sprout initiations paradoxically lead to reduced vessel branching and impaired vascular function. We examine the hypothesis that defects in the discrete stages of angiogenesis can uniquely contribute to vessel branching outcomes. METHODS AND RESULTS Time-lapse movies of mammalian blood vessel development were used to define and quantify the dynamics of angiogenic sprouting. We characterized the formation of new functional conduits by classifying discrete sequential stages-sprout initiation, extension, connection, and stability-that are differentially affected by manipulation of vascular endothelial growth factor-A (VEGF-A) signalling via genetic loss of the receptor flt-1 (vegfr1). In mouse embryonic stem cell-derived vessels genetically lacking flt-1, overall branching is significantly decreased while sprout initiations are significantly increased. Flt-1(-/-) mutant sprouts are less likely to retract, and they form increased numbers of connections with other vessels. However, loss of flt-1 also leads to vessel collapse, which reduces the number of new stable conduits. Computational simulations predict that loss of flt-1 results in ectopic Flk-1 signalling in connecting sprouts post-fusion, causing protrusion of cell processes into avascular gaps and collapse of branches. Thus, defects in stabilization of new vessel connections offset increased sprout initiations and connectivity in flt-1(-/-) vascular networks, with an overall outcome of reduced numbers of new conduits. CONCLUSIONS These results show that VEGF-A signalling has stage-specific effects on vascular morphogenesis, and that understanding these effects on dynamic stages of angiogenesis and how they integrate to expand a vessel network may suggest new therapeutic strategies.
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Affiliation(s)
- John C Chappell
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA Center for Heart and Regenerative Medicine Research, Virginia Tech Carilion Research Institute, Roanoke, VA 24014, USA
| | - Julia G Cluceru
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jessica E Nesmith
- Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Kevin P Mouillesseaux
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Vanessa B Bradley
- Center for Heart and Regenerative Medicine Research, Virginia Tech Carilion Research Institute, Roanoke, VA 24014, USA
| | - Caitlin M Hartland
- Center for Heart and Regenerative Medicine Research, Virginia Tech Carilion Research Institute, Roanoke, VA 24014, USA
| | - Yasmin L Hashambhoy-Ramsay
- Department of Biomedical Engineering and Institute for Computational Medicine, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Joseph Walpole
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Shayn M Peirce
- Department of Biomedical Engineering, University of Virginia, Charlottesville, VA 22908, USA
| | - Feilim Mac Gabhann
- Department of Biomedical Engineering and Institute for Computational Medicine, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Victoria L Bautch
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA Curriculum in Genetics and Molecular Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA Lineberger Comprehensive Cancer Center, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA McAllister Heart Institute, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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62
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Blancas AA, Balaoing LR, Acosta FM, Grande-Allen KJ. Identifying Behavioral Phenotypes and Heterogeneity in Heart Valve Surface Endothelium. Cells Tissues Organs 2016; 201:268-76. [PMID: 27144771 DOI: 10.1159/000444446] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/04/2016] [Indexed: 01/26/2023] Open
Abstract
Heart valvular endothelial cells (VECs) are distinct from vascular endothelial cells (ECs), but have an uncertain context within the spectrum of known endothelial phenotypes, including lymphatic ECs (LECs). Profiling the phenotypes of the heart valve surface VECs would facilitate identification of a proper seeding population for tissue-engineered valves, as well as elucidate mechanisms of valvular disease. Porcine VECs and porcine aortic ECs (AECs) were isolated from pig hearts and characterized to assess known EC and LEC markers. A transwell migration assay determined their propensity to migrate toward vascular endothelial growth factor, an angiogenic stimulus, over 24 h. Compared to AECs, Flt-1 was expressed on almost double the percentage of VECs, measured as 74 versus 38%. The expression of angiogenic EC markers CXCR4 and DLL4 was >90% on AECs, whereas VECs showed only 35% CXCR4+ and 47% DLL4+. AECs demonstrated greater migration (71.5 ± 11.0 cells per image field) than the VECs with 30.0 ± 15.3 cells per image field (p = 0.032). In total, 30% of VECs were positive for LYVE1+/Prox1+, while these markers were absent in AECs. In conclusion, the population of cells on the surface of heart valves is heterogeneous, consisting largely of nonangiogenic VECs and a subset of LECs. Previous studies have indicated the presence of LECs within the interior of the valves; however, this is the first study to demonstrate their presence on the surface. Identification of this unique endothelial mixture is a step forward in the development of engineered valve replacements as a uniform EC seeding population may not be the best option to maximize transplant success.
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63
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Wang X, Ling CC, Li L, Qin Y, Qi J, Liu X, You B, Shi Y, Zhang J, Jiang Q, Xu H, Sun C, You Y, Chai R, Liu D. MicroRNA-10a/10b represses a novel target gene mib1 to regulate angiogenesis. Cardiovasc Res 2016; 110:140-50. [PMID: 26825552 DOI: 10.1093/cvr/cvw023] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 01/16/2016] [Indexed: 11/12/2022] Open
Abstract
AIMS MicroRNA-10 (miR-10) was originally shown to regulate angiogenesis by directly modulating the levels of membrane-bound fms-related tyrosine kinase 1 (mflt1) and its soluble splice isoform sflt1 post-transcriptionally in zebrafish. Given that flt1 knockdown incompletely rescues the angiogenic phenotypes in miR-10 morphants, flt1 is unlikely to be the only important target of miR-10 in endothelial cells (ECs). It will be interesting to investigate new mechanism responsible for angiogenic defect induced by miR-10 knockdown. METHODS AND RESULTS Firstly, we demonstrated that miR-10a and miR-10b (miR-10a/10b) were highly enriched in embryonic zebrafish ECs using deep sequencing, Taqman polymerase chain reaction, and in situ hybridisation. Subsequently, we proved that loss of miR-10a/10b impaired blood vessel outgrowth through regulating tip cell behaviours. Mib1 was identified as a potential direct target of miR-10a/10b through in silicon analysis and in vitro luciferase sensor assay. In vivo reporter assay in zebrafish embryos confirmed the binding of miR-10 with 3'-UTR of zebrafish mib1. Furthermore, inhibition of mib1 and Notch signaling rescued the angiogenic defects in miR-10-deficient zebrafish embryos. In addition, we provided evidences that miR-10 regulates human ECs behaviour through targeting Mib1 as well. CONCLUSION Taken together, these results indicate that miR-10 regulates the angiogenic behaviour in a Notch-dependent manner by directly targeting mib1.
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Affiliation(s)
- Xin Wang
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | | | - Liping Li
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | - Yinyin Qin
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | - Jialing Qi
- Medical College, Nantong University, Nantong, China
| | - Xiaoyu Liu
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | - Bo You
- Affiliated Hospital of Nantong University, Nantong, China
| | - Yunwei Shi
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | - Jie Zhang
- Medical College, Nantong University, Nantong, China
| | - Qiu Jiang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital and Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Hui Xu
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | - Cheng Sun
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
| | - Yiwen You
- Affiliated Hospital of Nantong University, Nantong, China
| | - Renjie Chai
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China Co-innovation Center of Neuroregeneration, Key Laboratory for Developmental Genes and Human Disease, Ministry of Education, Institute of Life Sciences, Southeast University, No. 2 Sipailou Road, Nanjing 210096, China
| | - Dong Liu
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, Nantong 226001, China
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Wang X, Wang X, Yuan W, Chai R, Liu D. Egfl6 is involved in zebrafish notochord development. FISH PHYSIOLOGY AND BIOCHEMISTRY 2015; 41:961-969. [PMID: 25952972 DOI: 10.1007/s10695-015-0061-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2014] [Accepted: 04/23/2015] [Indexed: 06/04/2023]
Abstract
The epidermal growth factor (EGF) repeat motif defines a superfamily of diverse protein involved in regulating a variety of cellular and physiological processes, such as cell cycle, cell adhesion, proliferation, migration, and neural development. Egfl6, an EGF protein, also named MAGE was first cloned in human tissue. Up to date, the study of zebrafish Egfl6 expression pattern and functional analysis of Egfl6 involved in embryonic development of vertebrate in vivo is thus far lacking. Here we reported that Egfl6 was involved in zebrafish notochord development. It was shown that Egfl6 mRNA was expressed in zebrafish, developing somites, fin epidermis, pharyngeal arches, and hindbrain region. Particularly the secreted Egfl6 protein was significantly accumulated in notochord. Loss of Egfl6 function in zebrafish embryos resulted in curved body with distorted notochord in the posterior trunk. It was observed that expression of all Notch ligand and receptors in notochord of 28 hpf Egfl6 morphants was not affected, except notch2, which was up-regulated. We found that inhibition of Notch signaling by DAPT efficiently rescued notochord developmental defect of Egfl6 deficiency embryos.
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Affiliation(s)
- Xueqian Wang
- Co-innovation Center of Neuroregeneration, Jiangsu Key Laboratory of Neuroregeneration, Nantong University, Qixiu Road 19, 226001, Nantong, China
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VEGF, Notch and TGFβ/BMPs in regulation of sprouting angiogenesis and vascular patterning. Biochem Soc Trans 2015; 42:1576-83. [PMID: 25399573 DOI: 10.1042/bst20140231] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The blood vasculature is constantly adapting to meet the demand from tissue. In so doing, branches may form, reorganize or regress. These complex processes employ integration of multiple signalling cascades, some of them being restricted to endothelial and mural cells and, hence, suitable for targeting of the vasculature. Both genetic and drug targeting experiments have demonstrated the requirement for the vascular endothelial growth factor (VEGF) system, the Delta-like-Notch system and the transforming growth factor β (TGFβ)/bone morphogenetic protein (BMP) cascades in vascular development. Although several of these signalling cascades in part converge into common downstream components, they differ in temporal and spatial regulation and expression. For example, the pro-angiogenic VEGFA is secreted by cells in need of oxygen, presented to the basal side of the endothelium, whereas BMP9 and BMP10 are supplied via the bloodstream in constant interaction with the apical side to suppress angiogenesis. Delta-like 4 (DLL4), on the other hand, is provided as an endothelial membrane bound ligand. In the present article, we discuss recent data on the integration of these pathways in the process of sprouting angiogenesis and vascular patterning and malformation.
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66
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Lagendijk AK, Yap AS, Hogan BM. Endothelial cell-cell adhesion during zebrafish vascular development. Cell Adh Migr 2015; 8:136-45. [PMID: 24621476 DOI: 10.4161/cam.28229] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The vertebrate vasculature is an essential organ network with major roles in health and disease. The establishment of balanced cell-cell adhesion in the endothelium is crucial for the functionality of the vascular system. Furthermore, the correct patterning and integration of vascular endothelial cell-cell adhesion drives the morphogenesis of new vessels, and is thought to couple physical forces with signaling outcomes during development. Here, we review insights into this process that have come from studies in zebrafish. First, we describe mutants in which endothelial adhesion is perturbed, second we describe recent progress using in vivo cell biological approaches that allow the visualization of endothelial cell-cell junctions. These studies underline the profound potential of this model system to dissect in great detail the function of both known and novel regulators of endothelial cell-cell adhesion.
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Affiliation(s)
- Anne K Lagendijk
- Institute for Molecular Bioscience; The University of Queensland;Brisbane, QLD, Australia
| | - Alpha S Yap
- Institute for Molecular Bioscience; The University of Queensland;Brisbane, QLD, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience; The University of Queensland;Brisbane, QLD, Australia
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Basal Flt1 tyrosine kinase activity is a positive regulator of endothelial survival and vascularization during zebrafish embryogenesis. Biochim Biophys Acta Gen Subj 2015; 1850:373-84. [DOI: 10.1016/j.bbagen.2014.10.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 09/23/2014] [Accepted: 10/22/2014] [Indexed: 10/24/2022]
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68
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Rätsep MT, Felker AM, Kay VR, Tolusso L, Hofmann AP, Croy BA. Uterine natural killer cells: supervisors of vasculature construction in early decidua basalis. Reproduction 2015; 149:R91-102. [DOI: 10.1530/rep-14-0271] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Mammalian pregnancy involves tremendousde novomaternal vascular construction to adequately support conceptus development. In early mouse decidua basalis (DB), maternal uterine natural killer (uNK) cells oversee this process directing various aspects during the formation of supportive vascular networks. The uNK cells recruited to early implantation site DB secrete numerous factors that act in the construction of early decidual vessels (neoangiogenesis) as well as in the alteration of the structural components of newly developing and existing vessels (pruning and remodeling). Although decidual and placental development sufficient to support live births occur in the absence of normally functioning uNK cells, development and structure of implantation site are optimized through the presence of normally activated uNK cells. Human NK cells are also recruited to early decidua. Gestational complications including recurrent spontaneous abortion, fetal growth restriction, preeclampsia, and preterm labor are linked with the absence of human NK cell activation via paternally inherited conceptus transplantation antigens. This review summarizes the roles that mouse uNK cells normally play in decidual neoangiogenesis and spiral artery remodeling in mouse pregnancy and briefly discusses changes in early developmental angiogenesis due to placental growth factor deficiency.
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Wang Z, Dabrosin C, Yin X, Fuster MM, Arreola A, Rathmell WK, Generali D, Nagaraju GP, El-Rayes B, Ribatti D, Chen YC, Honoki K, Fujii H, Georgakilas AG, Nowsheen S, Amedei A, Niccolai E, Amin A, Ashraf SS, Helferich B, Yang X, Guha G, Bhakta D, Ciriolo MR, Aquilano K, Chen S, Halicka D, Mohammed SI, Azmi AS, Bilsland A, Keith WN, Jensen LD. Broad targeting of angiogenesis for cancer prevention and therapy. Semin Cancer Biol 2015; 35 Suppl:S224-S243. [PMID: 25600295 PMCID: PMC4737670 DOI: 10.1016/j.semcancer.2015.01.001] [Citation(s) in RCA: 318] [Impact Index Per Article: 35.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 12/25/2014] [Accepted: 01/08/2015] [Indexed: 12/20/2022]
Abstract
Deregulation of angiogenesis – the growth of new blood vessels from an existing vasculature – is a main driving force in many severe human diseases including cancer. As such, tumor angiogenesis is important for delivering oxygen and nutrients to growing tumors, and therefore considered an essential pathologic feature of cancer, while also playing a key role in enabling other aspects of tumor pathology such as metabolic deregulation and tumor dissemination/metastasis. Recently, inhibition of tumor angiogenesis has become a clinical anti-cancer strategy in line with chemotherapy, radiotherapy and surgery, which underscore the critical importance of the angiogenic switch during early tumor development. Unfortunately the clinically approved anti-angiogenic drugs in use today are only effective in a subset of the patients, and many who initially respond develop resistance over time. Also, some of the anti-angiogenic drugs are toxic and it would be of great importance to identify alternative compounds, which could overcome these drawbacks and limitations of the currently available therapy. Finding “the most important target” may, however, prove a very challenging approach as the tumor environment is highly diverse, consisting of many different cell types, all of which may contribute to tumor angiogenesis. Furthermore, the tumor cells themselves are genetically unstable, leading to a progressive increase in the number of different angiogenic factors produced as the cancer progresses to advanced stages. As an alternative approach to targeted therapy, options to broadly interfere with angiogenic signals by a mixture of non-toxic natural compound with pleiotropic actions were viewed by this team as an opportunity to develop a complementary anti-angiogenesis treatment option. As a part of the “Halifax Project” within the “Getting to know cancer” framework, we have here, based on a thorough review of the literature, identified 10 important aspects of tumor angiogenesis and the pathological tumor vasculature which would be well suited as targets for anti-angiogenic therapy: (1) endothelial cell migration/tip cell formation, (2) structural abnormalities of tumor vessels, (3) hypoxia, (4) lymphangiogenesis, (5) elevated interstitial fluid pressure, (6) poor perfusion, (7) disrupted circadian rhythms, (8) tumor promoting inflammation, (9) tumor promoting fibroblasts and (10) tumor cell metabolism/acidosis. Following this analysis, we scrutinized the available literature on broadly acting anti-angiogenic natural products, with a focus on finding qualitative information on phytochemicals which could inhibit these targets and came up with 10 prototypical phytochemical compounds: (1) oleanolic acid, (2) tripterine, (3) silibinin, (4) curcumin, (5) epigallocatechin-gallate, (6) kaempferol, (7) melatonin, (8) enterolactone, (9) withaferin A and (10) resveratrol. We suggest that these plant-derived compounds could be combined to constitute a broader acting and more effective inhibitory cocktail at doses that would not be likely to cause excessive toxicity. All the targets and phytochemical approaches were further cross-validated against their effects on other essential tumorigenic pathways (based on the “hallmarks” of cancer) in order to discover possible synergies or potentially harmful interactions, and were found to generally also have positive involvement in/effects on these other aspects of tumor biology. The aim is that this discussion could lead to the selection of combinations of such anti-angiogenic compounds which could be used in potent anti-tumor cocktails, for enhanced therapeutic efficacy, reduced toxicity and circumvention of single-agent anti-angiogenic resistance, as well as for possible use in primary or secondary cancer prevention strategies.
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Affiliation(s)
- Zongwei Wang
- Department of Urology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
| | - Charlotta Dabrosin
- Department of Oncology, Linköping University, Linköping, Sweden; Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Xin Yin
- Medicine and Research Services, Veterans Affairs San Diego Healthcare System & University of California, San Diego, San Diego, CA, USA
| | - Mark M Fuster
- Medicine and Research Services, Veterans Affairs San Diego Healthcare System & University of California, San Diego, San Diego, CA, USA
| | - Alexandra Arreola
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - W Kimryn Rathmell
- Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC, USA
| | - Daniele Generali
- Molecular Therapy and Pharmacogenomics Unit, AO Isituti Ospitalieri di Cremona, Cremona, Italy
| | - Ganji P Nagaraju
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA, USA
| | - Bassel El-Rayes
- Department of Hematology and Medical Oncology, Emory University, Atlanta, GA, USA
| | - Domenico Ribatti
- Department of Basic Medical Sciences, Neurosciences and Sensory Organs, University of Bari Medical School, Bari, Italy; National Cancer Institute Giovanni Paolo II, Bari, Italy
| | - Yi Charlie Chen
- Department of Biology, Alderson Broaddus University, Philippi, WV, USA
| | - Kanya Honoki
- Department of Orthopedic Surgery, Arthroplasty and Regenerative Medicine, Nara Medical University, Nara, Japan
| | - Hiromasa Fujii
- Department of Orthopedic Surgery, Arthroplasty and Regenerative Medicine, Nara Medical University, Nara, Japan
| | - Alexandros G Georgakilas
- Physics Department, School of Applied Mathematics and Physical Sciences, National Technical University of Athens, Athens, Greece
| | - Somaira Nowsheen
- Mayo Graduate School, Mayo Clinic College of Medicine, Rochester, MN, USA
| | - Amedeo Amedei
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Elena Niccolai
- Department of Experimental and Clinical Medicine, University of Florence, Florence, Italy
| | - Amr Amin
- Department of Biology, College of Science, United Arab Emirate University, United Arab Emirates; Faculty of Science, Cairo University, Cairo, Egypt
| | - S Salman Ashraf
- Department of Chemistry, College of Science, United Arab Emirate University, United Arab Emirates
| | - Bill Helferich
- University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Xujuan Yang
- University of Illinois at Urbana Champaign, Urbana, IL, USA
| | - Gunjan Guha
- School of Chemical and Bio Technology, SASTRA University, Thanjavur, India
| | - Dipita Bhakta
- School of Chemical and Bio Technology, SASTRA University, Thanjavur, India
| | | | - Katia Aquilano
- Department of Biology, University of Rome "Tor Vergata", Rome, Italy
| | - Sophie Chen
- Ovarian and Prostate Cancer Research Trust Laboratory, Guilford, Surrey, UK
| | | | - Sulma I Mohammed
- Department of Comparative Pathobiology, Purdue University Center for Cancer Research, West Lafayette, IN, USA
| | - Asfar S Azmi
- School of Medicine, Wayne State University, Detroit, MI, USA
| | - Alan Bilsland
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - W Nicol Keith
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Lasse D Jensen
- Department of Medical, and Health Sciences, Linköping University, Linköping, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden.
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Cast AE, Walter TJ, Huppert SS. Vascular patterning sets the stage for macro and micro hepatic architecture. Dev Dyn 2014; 244:497-506. [PMID: 25370311 DOI: 10.1002/dvdy.24222] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 10/29/2014] [Accepted: 10/30/2014] [Indexed: 01/20/2023] Open
Abstract
Background The liver is a complex organ with a variety of tissue components that require a precise architecture for optimal function of metabolic and detoxification processes. As a result of the delicate orchestration required between the various hepatic tissues, it is not surprising that impairment of hepatic function can be caused by a variety of factors leading to chronic liver disease. Results Despite the growing rate of chronic liver disease, there are currently few effective treatment options besides orthotopic liver transplantation. Better therapeutic options reside in the potential for genetic and cellular therapies that promote progenitor cell activation aiding de novo epithelial and vascular regeneration, cell replacement, or population of bioartificial hepatic devices. In order to explore this area of new therapeutic potential, it is crucial to understand the factors that promote hepatic function through regulating cell identities and tissue architecture. Conclusions In this commentary, we review the signals regulating liver cell fates during development and regeneration and highlight the importance of patterning the hepatic vascular systems to set the groundwork for the macro and micro hepatic architecture of the epithelium.
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Affiliation(s)
- Ashley E Cast
- Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
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71
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Hoi PM, Li S, Vong CT, Tseng HHL, Kwan YW, Lee SMY. Recent advances in structure-based drug design and virtual screening of VEGFR tyrosine kinase inhibitors. Methods 2014; 71:85-91. [PMID: 25239735 DOI: 10.1016/j.ymeth.2014.09.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2014] [Revised: 08/26/2014] [Accepted: 09/09/2014] [Indexed: 01/07/2023] Open
Abstract
During the past decade, developments in computational processing and X-ray crystallography have allowed virtual screening become integrated into drug discovery campaigns. This review focuses on the recent advancements in the drug discovery of VEGFR2 tyrosine kinase inhibitors (VEGFR2 TKIs) by using in silico methodologies. An introduction for the methodology framework of pharmacophore modeling, molecular docking and structure-based design are provided. We discuss the recent studies on the structures of VEGFR2 protein kinase in different binding modes, and the insights on molecular interactions gained from knowledge of the co-crystal structures complex with structurally diverse VEGFR2 inhibitors. We provide some aspects of model construction and molecular docking techniques. Several representative examples of successful applications on VEGFR2 virtual screening for hit discovery, lead optimization and structure-based design are also presented.
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Affiliation(s)
- Pui Man Hoi
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao, China.
| | - Shang Li
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao, China
| | - Chi Teng Vong
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao, China
| | - Hisa Hui Ling Tseng
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao, China
| | - Yiu Wa Kwan
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China
| | - Simon Ming-Yuen Lee
- State Key Laboratory of Quality Research in Chinese Medicine and Institute of Chinese Medical Sciences, University of Macau, Avenida da Universidade, Taipa, Macao, China
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Li W, Chen J, Deng M, Jing Q. The zebrafish Tie2 signaling controls tip cell behaviors and acts synergistically with Vegf pathway in developmental angiogenesis. Acta Biochim Biophys Sin (Shanghai) 2014; 46:641-6. [PMID: 25001479 DOI: 10.1093/abbs/gmu055] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Angiogenesis process in development is temporally accurate, and involves sprouting, subsequent endothelial cell proliferation, and migration. Tip cells, sensing the extracellular cues, play an important role in this process. Although it is known that several pathways including vascular endothelial growth factor (VEGF) and Notch control tip cell behaviors, the signaling process is largely unknown. Here we showed that an endothelial tyrosine kinase receptor-Tie2 was required for intersegmental vessel (ISV) growth and essential for the sprouting, migration, and proliferation of tip cells with morpholino knockdown strategy in zebrafish. Knockdown of vegf effectively reduced tie2 mRNA level, and tie2 knockdown efficiently blocked the vegf over-expression induced tyrosine kinase receptor-VEGFR1 (flk1) expression, which suggested that the function of Tie2 may be linked to the downstream of VEGF signaling pathway. Furthermore, we found that the embryos displayed normal ISV growth when injected with tie2 or vegf morpholino alone at a low dose, while co-knockdown of them resulted in a severe ISV defect, indicating a synergistic role in ISV formation. These observations demonstrate that Tie2 is an important regulator of tip cell behaviors. Moreover, these findings provide in vivo evidence that Tie2 acts coordinately with Vegf signaling to control angiogenesis.
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Bry M, Kivelä R, Leppänen VM, Alitalo K. Vascular Endothelial Growth Factor-B in Physiology and Disease. Physiol Rev 2014; 94:779-94. [DOI: 10.1152/physrev.00028.2013] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Vascular endothelial growth factor-B (VEGF-B), discovered over 15 years ago, has long been seen as one of the more ambiguous members of the VEGF family. VEGF-B is produced as two isoforms: one that binds strongly to heparan sulfate in the pericellular matrix and a soluble form that can acquire binding via proteolytic processing. Both forms of VEGF-B bind to VEGF-receptor 1 (VEGFR-1) and the neuropilin-1 (NRP-1) coreceptor, which are expressed mainly in blood vascular endothelial cells. VEGF-B-deficient mice and rats are viable without any overt phenotype, and the ability of VEGF-B to induce angiogenesis in most tissues is weak. This has been a puzzle, as the related placenta growth factor (PlGF) binds to the same receptors and induces angiogenesis and arteriogenesis in a variety of tissues. However, it seems that VEGF-B is a vascular growth factor that is more tissue specific and can have trophic and metabolic effects, and its binding to VEGFR-1 shows subtle but important differences compared with that of PlGF. VEGF-B has the potential to induce coronary vessel growth and cardiac hypertrophy, which can protect the heart from ischemic damage as well as heart failure. In addition, VEGF-B is abundantly expressed in tissues with highly active energy metabolism, where it could support significant metabolic functions. VEGF-B also has a role in neuroprotection, but unlike other members of the VEGF family, it does not have a clear role in tumor progression. Here we review what is hitherto known about the functions of this growth factor in physiology and disease.
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Affiliation(s)
- Maija Bry
- Wihuri Research Institute and Translational Cancer Biology Program, University of Helsinki, Helsinki, Finland
| | - Riikka Kivelä
- Wihuri Research Institute and Translational Cancer Biology Program, University of Helsinki, Helsinki, Finland
| | - Veli-Matti Leppänen
- Wihuri Research Institute and Translational Cancer Biology Program, University of Helsinki, Helsinki, Finland
| | - Kari Alitalo
- Wihuri Research Institute and Translational Cancer Biology Program, University of Helsinki, Helsinki, Finland
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McCollum CW, Hans C, Shah S, Merchant FA, Gustafsson JÅ, Bondesson M. Embryonic exposure to sodium arsenite perturbs vascular development in zebrafish. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2014; 152:152-163. [PMID: 24768856 DOI: 10.1016/j.aquatox.2014.04.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 04/02/2014] [Accepted: 04/05/2014] [Indexed: 06/03/2023]
Abstract
Exposure to arsenic in its inorganic form, arsenite, causes adverse effects to many different organs and tissues. Here, we have investigated arsenite-induced adverse effects on vascular tissues in the model organism zebrafish, Danio rerio. Zebrafish embryos were exposed to arsenite at different exposure windows and the susceptibility to vascular tissue damage was recorded at 72hours post fertilization (hpf). Intersegmental vessel sprouting and growth was most perturbed by exposure to arsenite during the 24-48hpf window, while disruption in the condensation of the caudal vein plexus was more often observed at the 48-72hpf exposure window, reflecting when these structures develop during normal embryogenesis. The vascular growth rate was decreased by arsenite exposure, and deviated from that of control embryos at around 24-26.5hpf. We further mapped changes in expression of key regulators of angiogenesis and vasculogenesis. Downregulation of vascular endothelial growth factor receptor 1/fms-related tyrosine kinase 1 (vegfr1/flt1) expression was evident already at 24hpf, coinciding with the decreased vascular growth rate. At later time points, matrix metalloproteinase 9 (mmp9) expression was upregulated, suggesting that arsenite affects the composition of the extracellular matrix. In total, the expression of eight key factors involved in different aspects of vascularization was significantly altered by arsenic exposure. In conclusion, our results show that arsenite is a potent vascular disruptor in the developing zebrafish embryo, a finding that calls for an evaluation of arsenite as a developmental vascular toxicant in mammalian model systems.
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Affiliation(s)
- Catherine W McCollum
- Center for Nuclear Receptors and Cell Signaling, Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA.
| | - Charu Hans
- Department of Computer Science, University of Houston, Houston, TX 77204, USA
| | - Shishir Shah
- Department of Computer Science, University of Houston, Houston, TX 77204, USA
| | - Fatima A Merchant
- Department of Computer Science, University of Houston, Houston, TX 77204, USA; Department of Engineering Technology, University of Houston, Houston, TX 77204, USA
| | - Jan-Åke Gustafsson
- Center for Nuclear Receptors and Cell Signaling, Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA
| | - Maria Bondesson
- Center for Nuclear Receptors and Cell Signaling, Department of Biology and Biochemistry, University of Houston, Houston, TX 77204, USA
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Angiogenesis in zebrafish. Semin Cell Dev Biol 2014; 31:106-14. [DOI: 10.1016/j.semcdb.2014.04.037] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/24/2014] [Accepted: 04/30/2014] [Indexed: 12/21/2022]
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Tual-Chalot S, Mahmoud M, Allinson KR, Redgrave RE, Zhai Z, Oh SP, Fruttiger M, Arthur HM. Endothelial depletion of Acvrl1 in mice leads to arteriovenous malformations associated with reduced endoglin expression. PLoS One 2014; 9:e98646. [PMID: 24896812 PMCID: PMC4045906 DOI: 10.1371/journal.pone.0098646] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 05/06/2014] [Indexed: 01/28/2023] Open
Abstract
Rare inherited cardiovascular diseases are frequently caused by mutations in genes that are essential for the formation and/or function of the cardiovasculature. Hereditary Haemorrhagic Telangiectasia is a familial disease of this type. The majority of patients carry mutations in either Endoglin (ENG) or ACVRL1 (also known as ALK1) genes, and the disease is characterized by arteriovenous malformations and persistent haemorrhage. ENG and ACVRL1 encode receptors for the TGFβ superfamily of ligands, that are essential for angiogenesis in early development but their roles are not fully understood. Our goal was to examine the role of Acvrl1 in vascular endothelial cells during vascular development and to determine whether loss of endothelial Acvrl1 leads to arteriovenous malformations. Acvrl1 was depleted in endothelial cells either in early postnatal life or in adult mice. Using the neonatal retinal plexus to examine angiogenesis, we observed that loss of endothelial Acvrl1 led to venous enlargement, vascular hyperbranching and arteriovenous malformations. These phenotypes were associated with loss of arterial Jag1 expression, decreased pSmad1/5/8 activity and increased endothelial cell proliferation. We found that Endoglin was markedly down-regulated in Acvrl1-depleted ECs showing endoglin expression to be downstream of Acvrl1 signalling in vivo. Endothelial-specific depletion of Acvrl1 in pups also led to pulmonary haemorrhage, but in adult mice resulted in caecal haemorrhage and fatal anaemia. We conclude that during development, endothelial Acvrl1 plays an essential role to regulate endothelial cell proliferation and arterial identity during angiogenesis, whilst in adult life endothelial Acvrl1 is required to maintain vascular integrity.
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Affiliation(s)
- Simon Tual-Chalot
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
| | - Marwa Mahmoud
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
| | | | - Rachael E. Redgrave
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
| | - Zhenhua Zhai
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
| | - S. Paul Oh
- Department of Physiology, University of Florida, Gainesville, Florida, United States of America
| | | | - Helen M. Arthur
- Institute of Genetic Medicine, Newcastle University, Newcastle, United Kingdom
- * E-mail:
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Walter TJ, Cast AE, Huppert KA, Huppert SS. Epithelial VEGF signaling is required in the mouse liver for proper sinusoid endothelial cell identity and hepatocyte zonation in vivo. Am J Physiol Gastrointest Liver Physiol 2014; 306:G849-62. [PMID: 24650547 PMCID: PMC4024728 DOI: 10.1152/ajpgi.00426.2013] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Vascular endothelial growth factor (VEGF) is crucial for vascular development in several organs. However, the specific contribution of epithelial-VEGF signaling in the liver has not been tested. We used a mouse model to specifically delete Vegf from the liver epithelial lineages during midgestational development and assessed the cell identities and architectures of epithelial and endothelial tissues. We find that without epithelial-derived VEGF, the zonal endothelial and hepatocyte cell identities are altered. We also find decreased portal vein and hepatic artery branching coincident with an increase in hepatic hypoxia postnatally. Together, these data indicate that VEGF secreted from the hepatic epithelium is required for normal differentiation of cells and establishment of three-dimensional vascular branching and zonal architectures in both epithelial and endothelial hepatic tissues.
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Affiliation(s)
- Teagan J. Walter
- 1Department of Cell and Developmental Biology, Vanderbilt University Medical Center, Nashville, Tennessee; and ,2Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Ashley E. Cast
- 2Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Kari A. Huppert
- 2Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Stacey S. Huppert
- 2Division of Gastroenterology, Hepatology, and Nutrition, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
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Coxam B, Sabine A, Bower NI, Smith KA, Pichol-Thievend C, Skoczylas R, Astin JW, Frampton E, Jaquet M, Crosier PS, Parton RG, Harvey NL, Petrova TV, Schulte-Merker S, Francois M, Hogan BM. Pkd1 regulates lymphatic vascular morphogenesis during development. Cell Rep 2014; 7:623-33. [PMID: 24767999 DOI: 10.1016/j.celrep.2014.03.063] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 02/13/2014] [Accepted: 03/26/2014] [Indexed: 01/21/2023] Open
Abstract
Lymphatic vessels arise during development through sprouting of precursor cells from veins, which is regulated by known signaling and transcriptional mechanisms. The ongoing elaboration of vessels to form a network is less well understood. This involves cell polarization, coordinated migration, adhesion, mixing, regression, and shape rearrangements. We identified a zebrafish mutant, lymphatic and cardiac defects 1 (lyc1), with reduced lymphatic vessel development. A mutation in polycystic kidney disease 1a was responsible for the phenotype. PKD1 is the most frequently mutated gene in autosomal dominant polycystic kidney disease (ADPKD). Initial lymphatic precursor sprouting is normal in lyc1 mutants, but ongoing migration fails. Loss of Pkd1 in mice has no effect on precursor sprouting but leads to failed morphogenesis of the subcutaneous lymphatic network. Individual lymphatic endothelial cells display defective polarity, elongation, and adherens junctions. This work identifies a highly selective and unexpected role for Pkd1 in lymphatic vessel morphogenesis during development.
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Affiliation(s)
- Baptiste Coxam
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Amélie Sabine
- Department of Oncology, University Hospital of Lausanne, and Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
| | - Neil I Bower
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Kelly A Smith
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Cathy Pichol-Thievend
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Renae Skoczylas
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Jonathan W Astin
- Department of Molecular Medicine and Pathology, School of Medical Sciences, The University of Auckland, 1142 Auckland, New Zealand
| | - Emmanuelle Frampton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Muriel Jaquet
- Department of Oncology, University Hospital of Lausanne, and Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
| | - Philip S Crosier
- Department of Molecular Medicine and Pathology, School of Medical Sciences, The University of Auckland, 1142 Auckland, New Zealand
| | - Robert G Parton
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Natasha L Harvey
- Division of Haematology, Centre for Cancer Biology, SA Pathology, Adelaide, SA 5000, Australia
| | - Tatiana V Petrova
- Department of Oncology, University Hospital of Lausanne, and Department of Biochemistry, University of Lausanne, 1066 Epalinges, Switzerland
| | | | - Mathias Francois
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Benjamin M Hogan
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia.
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79
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Wacker A, Gerhardt H, Phng LK. Tissue guidance without filopodia. Commun Integr Biol 2014; 7:e28820. [PMID: 25346793 PMCID: PMC4203535 DOI: 10.4161/cib.28820] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 04/08/2014] [Indexed: 02/05/2023] Open
Abstract
Filopodia are highly dynamic, rod-like protrusions that are found in abundance at the leading edge of migrating cells such as endothelial tip cells and at axonal growth cones of developing neurons. One proposed function of filopodia is that of an environmental probe, which serves to sense guidance cues during neuronal pathfinding and blood vessel patterning. However, recent studies show that tissue guidance occurs unhindered in the absence of filopodia, suggesting a dispensability of filopodia in this process. Here, we discuss evidence that support as well as dispute the role of filopodia in guiding the formation of stereotypic neuronal and blood vessel patterns.
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Affiliation(s)
- Andrin Wacker
- Department of Oncology; Vascular Patterning Laboratory; VRC; Leuven, Belgium ; VIB; Vascular Patterning Laboratory; VRC; Leuven, Belgium
| | - Holger Gerhardt
- Department of Oncology; Vascular Patterning Laboratory; VRC; Leuven, Belgium ; VIB; Vascular Patterning Laboratory; VRC; Leuven, Belgium ; Vascular Biology Laboratory; London Research Institute; Cancer Research UK; London, UK
| | - Li-Kun Phng
- Department of Oncology; Vascular Patterning Laboratory; VRC; Leuven, Belgium ; VIB; Vascular Patterning Laboratory; VRC; Leuven, Belgium
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80
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Weavers H, Skaer H. Tip cells: master regulators of tubulogenesis? Semin Cell Dev Biol 2014; 31:91-9. [PMID: 24721475 PMCID: PMC4071413 DOI: 10.1016/j.semcdb.2014.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 03/26/2014] [Accepted: 04/01/2014] [Indexed: 11/18/2022]
Abstract
Single tip cells or groups of leading cells develop at the forefront of growing tissues. Tip cells regulate tubule growth and morphogenesis. Tip cells develop distinctive patterns of gene expression and specialised characteristics. Tip cells are required for health and may be involved in the progression of cancer.
The normal development of an organ depends on the coordinated regulation of multiple cell activities. Focusing on tubulogenesis, we review the role of specialised cells or groups of cells that are selected from within tissue primordia and differentiate at the outgrowing tips or leading edge of developing tubules. Tip or leading cells develop distinctive patterns of gene expression that enable them to act both as sensors and transmitters of intercellular signalling. This enables them to explore the environment, respond to both tissue intrinsic signals and extrinsic cues from surrounding tissues and to regulate the behaviour of their neighbours, including the setting of cell fate, patterning cell division, inducing polarity and promoting cell movement and cell rearrangements by neighbour exchange. Tip cells are also able to transmit mechanical tension to promote tissue remodelling and, by interacting with the extracellular matrix, they can dictate migratory pathways and organ shape. Where separate tubular structures fuse to form networks, as in the airways of insects or the vascular system of vertebrates, specialised fusion tip cells act to interconnect disparate elements of the developing network. Finally, we consider their importance in the maturation of mature physiological function and in the development of disease.
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Affiliation(s)
- Helen Weavers
- Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK
| | - Helen Skaer
- Department of Zoology, Downing Street, Cambridge CB2 3EJ, UK.
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81
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Fang L, Liu C, Miller YI. Zebrafish models of dyslipidemia: relevance to atherosclerosis and angiogenesis. Transl Res 2014; 163:99-108. [PMID: 24095954 PMCID: PMC3946603 DOI: 10.1016/j.trsl.2013.09.004] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 09/07/2013] [Accepted: 09/10/2013] [Indexed: 01/07/2023]
Abstract
Lipid and lipoprotein metabolism in zebrafish and in humans are remarkably similar. Zebrafish express all major nuclear receptors, lipid transporters, apolipoproteins and enzymes involved in lipoprotein metabolism. Unlike mice, zebrafish express cetp and the Cetp activity is detected in zebrafish plasma. Feeding zebrafish a high cholesterol diet, without any genetic intervention, results in significant hypercholesterolemia and robust lipoprotein oxidation, making zebrafish an attractive animal model to study mechanisms relevant to early development of human atherosclerosis. These studies are facilitated by the optical transparency of zebrafish larvae and the availability of transgenic zebrafish expressing fluorescent proteins in endothelial cells and macrophages. Thus, vascular processes can be monitored in live animals. In this review article, we discuss recent advances in using dyslipidemic zebrafish in atherosclerosis-related studies. We also summarize recent work connecting lipid metabolism with regulation of angiogenesis, the work that considerably benefited from using the zebrafish model. These studies uncovered the role of aibp, abca1, abcg1, mtp, apoB, and apoC2 in regulation of angiogenesis in zebrafish and paved the way for future studies in mammals, which may suggest new therapeutic approaches to modulation of excessive or diminished angiogenesis contributing to the pathogenesis of human disease.
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Affiliation(s)
- Longhou Fang
- Department of Medicine, University of California, San Diego, La Jolla, Calif
| | - Chao Liu
- Department of Medicine, University of California, San Diego, La Jolla, Calif
| | - Yury I Miller
- Department of Medicine, University of California, San Diego, La Jolla, Calif.
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82
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Schoors S, De Bock K, Cantelmo AR, Georgiadou M, Ghesquière B, Cauwenberghs S, Kuchnio A, Wong BW, Quaegebeur A, Goveia J, Bifari F, Wang X, Blanco R, Tembuyser B, Cornelissen I, Bouché A, Vinckier S, Diaz-Moralli S, Gerhardt H, Telang S, Cascante M, Chesney J, Dewerchin M, Carmeliet P. Partial and transient reduction of glycolysis by PFKFB3 blockade reduces pathological angiogenesis. Cell Metab 2014; 19:37-48. [PMID: 24332967 DOI: 10.1016/j.cmet.2013.11.008] [Citation(s) in RCA: 389] [Impact Index Per Article: 38.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 10/21/2013] [Accepted: 11/06/2013] [Indexed: 01/26/2023]
Abstract
Strategies targeting pathological angiogenesis have focused primarily on blocking vascular endothelial growth factor (VEGF), but resistance and insufficient efficacy limit their success, mandating alternative antiangiogenic strategies. We recently provided genetic evidence that the glycolytic activator phosphofructokinase-2/fructose-2,6-bisphosphatase 3 (PFKFB3) promotes vessel formation but did not explore the antiangiogenic therapeutic potential of PFKFB3 blockade. Here, we show that blockade of PFKFB3 by the small molecule 3-(3-pyridinyl)-1-(4-pyridinyl)-2-propen-1-one (3PO) reduced vessel sprouting in endothelial cell (EC) spheroids, zebrafish embryos, and the postnatal mouse retina by inhibiting EC proliferation and migration. 3PO also suppressed vascular hyperbranching induced by inhibition of Notch or VEGF receptor 1 (VEGFR1) and amplified the antiangiogenic effect of VEGF blockade. Although 3PO reduced glycolysis only partially and transiently in vivo, this sufficed to decrease pathological neovascularization in ocular and inflammatory models. These insights may offer therapeutic antiangiogenic opportunities.
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Affiliation(s)
- Sandra Schoors
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Katrien De Bock
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Anna Rita Cantelmo
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Maria Georgiadou
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Bart Ghesquière
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Sandra Cauwenberghs
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Anna Kuchnio
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Brian W Wong
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Annelies Quaegebeur
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Jermaine Goveia
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Francesco Bifari
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Xingwu Wang
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Raquel Blanco
- Vascular Biology Laboratory, London Research Institute, Cancer Research UK, London WC2A 3LY, UK
| | - Bieke Tembuyser
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Ivo Cornelissen
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Ann Bouché
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Stefan Vinckier
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Santiago Diaz-Moralli
- Department of Biochemistry and Molecular Biology and IBUB, Universitat de Barcelona, Barcelona 08007, Spain
| | - Holger Gerhardt
- Vascular Biology Laboratory, London Research Institute, Cancer Research UK, London WC2A 3LY, UK; Vascular Patterning Laboratory, Vesalius Research Center, University of Leuven, Leuven 3000, Belgium; Vascular Patterning Laboratory, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Sucheta Telang
- James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Marta Cascante
- Department of Biochemistry and Molecular Biology and IBUB, Universitat de Barcelona, Barcelona 08007, Spain
| | - Jason Chesney
- James Graham Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA
| | - Mieke Dewerchin
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, Department of Oncology, University of Leuven, Leuven 3000, Belgium; Laboratory of Angiogenesis and Neurovascular link, Vesalius Research Center, VIB, Leuven 3000, Belgium.
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83
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Liu CL, Kwok HF, Cheng L, Ko CH, Wong CW, Ho TWF, Leung PC, Fung KP, Lau CBS. Molecular mechanisms of angiogenesis effect of active sub-fraction from root of Rehmannia glutinosa by zebrafish sprout angiogenesis-guided fractionation. JOURNAL OF ETHNOPHARMACOLOGY 2014; 151:565-75. [PMID: 24247081 DOI: 10.1016/j.jep.2013.11.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Revised: 08/17/2013] [Accepted: 11/10/2013] [Indexed: 05/04/2023]
Abstract
ETHNOPHARMACOLOGICAL IMPORTANCE The root of Rehmannia glutinosa (Rehmanniae Radix (RR)) is clinically used as a wound-healing agent in traditional Chinese medicine. Angiogenesis acts crucially in the pathogenesis of chronic wound healing. The present study investigated the angiogenesis effect and its underlying mechanism of RR through zebrafish sprout angiogenesis guided-fractionation. MATERIALS AND METHODS The in vivo angiogenesis effect was studied by analyzing the number of ectopic sprouts formed upon sub-intestinal vessel of transgenic TG(fli1:EGFP)(y1)/+(AB) zebrafish embryos by fluorescence microscopy. Quantitative real-time PCR gene expression of the zebrafish embryos was further performed using a panel of 30 angiogenesis-associated genes designed for zebrafish sprout angiogenesis. Classical in vitro angiogenesis assays using human microvascular endothelial cells (HMEC-1) was accompanied. RESULTS We demonstrated that among all RR sub-fractions tested, C1-1 treated-zebrafish embryos possessed the most potent angiogenesis activities (from 190 to 780 ng/ml, p<0.001) in sprout formation in the zebrafish model. Quantitative gene expression of the treated embryos demonstrated significant up-regulation in MMP-9 (p<0.05), ANGPT1 (p<0.05), EGFR (p<0.05), EPHB4 (p<0.01), and significant down-regulation in Ephrin B2 (p<0.05), Flt-1 (p<0.05) and Ets-1 (p<0.05). C1-1 treatment could also significantly (p<0.001-0.05) stimulate HMEC-1 cell migration in scratch assay. Significant increase (p<0.05) in mean tubule length was observed in the C1-1-treated HMEC-1 cells in the tubule formation assay. CONCLUSIONS Our zebrafish sprout angiogenesis model-guided fractionation revealed that C1-1 possessed the most potent angiogenesis effect in RR. The design of the panel with 30 tailor-made angiogenesis-associated genes exhibited in zebrafish gene expression analysis showed that C1-1 could trigger differential expression of various angiogenesis-associated genes, such as VEGFR3 and MMP9, which played key role in angiogenesis. The pro-angiogenic activity of C1-1 was further confirmed in the translated study in motogenic and tubule-inducing effect using HMEC-1.
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Affiliation(s)
- Cheuk-Lun Liu
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Hin-Fai Kwok
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Ling Cheng
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Chun-Hay Ko
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Chun-Wai Wong
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Tina Wai Fong Ho
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Ping-Chung Leung
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Kwok-Pui Fung
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong
| | - Clara Bik-San Lau
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, Hong Kong.
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84
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Wilkinson RN, van Eeden FJ. The Zebrafish as a Model of Vascular Development and Disease. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2014; 124:93-122. [DOI: 10.1016/b978-0-12-386930-2.00005-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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85
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Nonmuscle myosin II-B (myh10) expression analysis during zebrafish embryonic development. Gene Expr Patterns 2013; 13:265-70. [DOI: 10.1016/j.gep.2013.04.005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 04/24/2013] [Accepted: 04/29/2013] [Indexed: 11/20/2022]
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86
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Phng LK, Stanchi F, Gerhardt H. Filopodia are dispensable for endothelial tip cell guidance. Development 2013; 140:4031-40. [DOI: 10.1242/dev.097352] [Citation(s) in RCA: 162] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Actin filaments are instrumental in driving processes such as migration, cytokinesis and endocytosis and provide cells with mechanical support. During angiogenesis, actin-rich filopodia protrusions have been proposed to drive endothelial tip cell functions by translating guidance cues into directional migration and mediating new contacts during anastomosis. To investigate the structural organisation, dynamics and functional importance of F-actin in endothelial cells (ECs) during angiogenesis in vivo, we generated a transgenic zebrafish line expressing Lifeact-EGFP in ECs. Live imaging identifies dynamic and transient F-actin-based structures, such as filopodia, contractile ring and cell cortex, and more persistent F-actin-based structures, such as cell junctions. For functional analysis, we used low concentrations of Latrunculin B that preferentially inhibited F-actin polymerisation in filopodia. In the absence of filopodia, ECs continued to migrate, albeit at reduced velocity. Detailed morphological analysis reveals that ECs generate lamellipodia that are sufficient to drive EC migration when filopodia formation is inhibited. Vessel guidance continues unperturbed during intersegmental vessel development in the absence of filopodia. Additionally, hypersprouting induced by loss of Dll4 and attraction of aberrant vessels towards ectopic sources of Vegfa165 can occur in the absence of endothelial filopodia protrusion. These results reveal that the induction of tip cells and the integration of endothelial guidance cues do not require filopodia. Anastomosis, however, shows regional variations in filopodia requirement, suggesting that ECs might rely on different protrusive structures depending on the nature of the environment or of angiogenic cues.
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Affiliation(s)
- Li-Kun Phng
- KU Leuven, Department of Oncology, Vesalius Research Centre, Vascular Patterning Lab, Herestraat 49, 3000 Leuven, Belgium
- VIB, Vesalius Research Centre, Vascular Patterning Lab, Herestraat 49, 3000 Leuven, Belgium
| | - Fabio Stanchi
- KU Leuven, Department of Oncology, Vesalius Research Centre, Vascular Patterning Lab, Herestraat 49, 3000 Leuven, Belgium
- VIB, Vesalius Research Centre, Vascular Patterning Lab, Herestraat 49, 3000 Leuven, Belgium
| | - Holger Gerhardt
- KU Leuven, Department of Oncology, Vesalius Research Centre, Vascular Patterning Lab, Herestraat 49, 3000 Leuven, Belgium
- VIB, Vesalius Research Centre, Vascular Patterning Lab, Herestraat 49, 3000 Leuven, Belgium
- Vascular Biology Laboratory, London Research Institute, Cancer Research UK, 44 Lincoln’s Inn Fields, London WC2A 3LY, UK
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87
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TNFSF15 inhibits vasculogenesis by regulating relative levels of membrane-bound and soluble isoforms of VEGF receptor 1. Proc Natl Acad Sci U S A 2013; 110:13863-8. [PMID: 23918400 DOI: 10.1073/pnas.1304529110] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Mouse bone marrow-derived Lin(-)-Sca-1(+) endothelial progenitor cell (EPC) has pluripotent abilities such as supporting neovascularization. Vascular endothelial growth factor (VEGF) receptor 1 (VEGFR1) (Flt1) recognizes various VEGF isoforms and is critically implicated in a wide range of physiological and pathological settings, including vasculogenesis. Mouse EPC expresses two isoforms of VEGFR1: mFlt1, which transmits ligand-induced signals; and sFlt1, which acts as a negative regulator by sequestering ligands of VEGF receptors. How the relative levels of mFlt1 and sFlt1 are regulated is not yet clear. We report here that tumor necrosis factor superfamily 15 (TNFSF15) (also known as VEGI or TL1A), an endothelial cell-secreted cytokine, simultaneously promotes mFlt1 degradation and up-regulates sFlt1 expression in EPC, giving rise to disruption of VEGF- or PlGF-induced activation of eNOS and MAPK p38 and effective inhibition of VEGF-driven, EPC-supported vasculogenesis in a murine Matrigel implant model. TNFSF15 treatment of EPC cultures facilitates Akt deactivation-dependent, ubiquitin-assisted degradation of mFlt1 and stimulates sFlt1 expression by activating the PKC, Src, and Erk1/2 signaling pathway. Additionally, TNFSF15 promotes alternative splicing of the Flt1 gene in favor of sFlt1 production by down-regulating nuclear protein Jumonji domain-containing protein 6 (Jmjd6), thus alleviating Jmjd6-inhibited sFlt1 expression. These findings indicate that TNFSF15 is a key component of a molecular mechanism that negatively modulates EPC-supported vasculogenesis through regulation of the relative levels of mFlt1 and sFlt1 in EPC.
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88
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Welti J, Loges S, Dimmeler S, Carmeliet P. Recent molecular discoveries in angiogenesis and antiangiogenic therapies in cancer. J Clin Invest 2013; 123:3190-200. [PMID: 23908119 DOI: 10.1172/jci70212] [Citation(s) in RCA: 455] [Impact Index Per Article: 41.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Four decades ago, angiogenesis was recognized as a therapeutic target for blocking cancer growth. Because of its importance, VEGF has been at the center stage of antiangiogenic therapy. Now, several years after FDA approval of an anti-VEGF antibody as the first antiangiogenic agent, many patients with cancer and ocular neovascularization have benefited from VEGF-targeted therapy; however, this anticancer strategy is challenged by insufficient efficacy, intrinsic refractoriness, and resistance. Here, we examine recent discoveries of new mechanisms underlying angiogenesis, discuss successes and challenges of current antiangiogenic therapy, and highlight emerging antiangiogenic paradigms.
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Affiliation(s)
- Jonathan Welti
- Vesalius Research Center, University of Leuven, Leuven, Belgium
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89
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Zhang Z, Zhou B. Accelerated coronary angiogenesis by vegfr1-knockout endocardial cells. PLoS One 2013; 8:e70570. [PMID: 23894673 DOI: 10.1371/journal.pone.0070570] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 06/20/2013] [Indexed: 12/21/2022] Open
Abstract
During mouse heart development, ventricular endocardial cells give rise to the coronary arteries by angiogenesis. Myocardially-derived vascular endothelial growth factor-a (Vegfa) regulates embryonic coronary angiogenesis through vascular endothelial growth factor-receptor 2 (Vegfr2) expressed in the endocardium. In this study, we investigated the role of endocardially-produced soluble Vegfr1 (sVegfr1) in the coronary angiogenesis. We deleted sVegfr1 in the endocardium of the developing mouse heart and found that this deletion resulted in a precocious formation of coronary plexuses. Using an ex vivo coronary angiogenesis assay, we showed that the Vegfr1-null ventricular endocardial cells underwent excessive angiogenesis and generated extensive endothelial tubular networks. We also revealed by qPCR analysis that expression of genes involved in the Vegf-Notch pathway was augmented in the Vegfr1-null hearts. We further showed that inhibition of Notch signaling blocked the formation of coronary plexuses by the ventricular endocardial cells. These results establish that Vegfr1 produced in the endocardium negatively regulates embryonic coronary angiogenesis, possibly by limiting the Vegf-Notch signaling.
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Affiliation(s)
- Zheng Zhang
- The State Key Laboratory of Biotherapy, West China Medical School of Sichuan University, Chengdu, Sichuan, China
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90
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Jiang Q, Lagos-Quintana M, Liu D, Shi Y, Helker C, Herzog W, le Noble F. miR-30a regulates endothelial tip cell formation and arteriolar branching. Hypertension 2013; 62:592-8. [PMID: 23817492 DOI: 10.1161/hypertensionaha.113.01767] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Microvascular rarefaction increases vascular resistance and pressure in systemic arteries and is a hallmark of fixed essential hypertension. Preventing rarefaction by activation of angiogenic processes could lower blood pressure. Endothelial tip cells in angiogenic sprouts direct branching of microvascular networks; the process is regulated by microRNAs, particularly the miR-30 family. We investigated the contribution of miR-30 family members in arteriolar branching morphogenesis via delta-like 4 (Dll4)-Notch signaling in a zebrafish model. The miR-30 family consists of 5 members (miR-30a-e). Loss-of-function experiments showed that only miR-30a reduced growth of intersegmental arterioles involving impaired tip cell function. Overexpression of miR-30a stimulated tip cell behavior resulting in augmented branching of intersegmental arterioles. In vitro and in vivo reporter assays showed that miR-30a directly targets the Notch ligand Dll4, a key inhibitor of tip cell formation. Coadministration of a Dll4 targeting morpholino in miR-30a morphants rescued the branching defects. Conversely, conditional overexpression of Notch intracellular domain restored arteriolar branching in miR-30a gain-of-function embryos. In human endothelial cells, loss of miR-30a increased DLL4 protein levels, activated Notch signaling as indicated in Notch reporter assays, and augmented Notch downstream effector, HEY2 and EFNB2 (ephrin-B2), expression. In spheroid assays, miR-30a loss- and gain-of-function affected tip cell behavior, consistent with miR-30a targeting Dll4. Our data suggest that miR-30a stimulates arteriolar branching by downregulating endothelial Dll4 expression, thereby controlling endothelial tip cell behavior. These findings could have relevance to the rarefaction process and, therefore, to hypertension.
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Affiliation(s)
- Qiu Jiang
- Department of Angiogenesis and Cardiovascular Pathology, Max Delbrück Center for Molecular Medicine, Robert Roessle Strasse 10, D13125 Berlin, Germany
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91
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Abstract
The circulatory system is the first organ system to develop in the vertebrate embryo and is critical throughout gestation for the delivery of oxygen and nutrients to, as well as removal of metabolic waste products from, growing tissues. Endothelial cells, which constitute the luminal layer of all blood and lymphatic vessels, emerge de novo from the mesoderm in a process known as vasculogenesis. The vascular plexus that is initially formed is then remodeled and refined via proliferation, migration, and sprouting of endothelial cells to form new vessels from preexisting ones during angiogenesis. Mural cells are also recruited by endothelial cells to form the surrounding vessel wall. During this vascular remodeling process, primordial endothelial cells are specialized to acquire arterial, venous, and blood-forming hemogenic phenotypes and functions. A subset of venous endothelium is also specialized to become lymphatic endothelium later in development. The specialization of all endothelial cell subtypes requires extrinsic signals and intrinsic regulatory events, which will be discussed in this review.
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Affiliation(s)
- Kathrina L Marcelo
- Interdepartmental Program in Developmental Biology, Baylor College of Medicine, Houston, TX, USA
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92
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Chappell JC, Mouillesseaux KP, Bautch VL. Flt-1 (vascular endothelial growth factor receptor-1) is essential for the vascular endothelial growth factor-Notch feedback loop during angiogenesis. Arterioscler Thromb Vasc Biol 2013; 33:1952-9. [PMID: 23744993 DOI: 10.1161/atvbaha.113.301805] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
OBJECTIVE Vascular endothelial growth factor (VEGF) signaling induces Notch signaling during angiogenesis. Flt-1/VEGF receptor-1 negatively modulates VEGF signaling. Therefore, we tested the hypothesis that disrupted Flt-1 regulation of VEGF signaling causes Notch pathway defects that contribute to dysmorphogenesis of Flt-1 mutant vessels. APPROACH AND RESULTS Wild-type and flt-1(-/-) mouse embryonic stem cell-derived vessels were exposed to pharmacological and protein-based Notch inhibitors with and without added VEGF. Vessel morphology, endothelial cell proliferation, and Notch target gene expression levels were assessed. Similar pathway manipulations were performed in developing vessels of zebrafish embryos. Notch inhibition reduced flt-1(-/-) embryonic stem cell-derived vessel branching dysmorphogenesis and endothelial hyperproliferation, and rescue of flt-1(-/-) vessels was accompanied by a reduction in elevated Notch targets. Surprisingly, wild-type vessel morphogenesis and proliferation were unaffected by Notch suppression, Notch targets in wild-type endothelium were unchanged, and Notch suppression perturbed zebrafish intersegmental vessels but not caudal vein plexuses. In contrast, exogenous VEGF caused wild-type embryonic stem cell-derived vessel and zebrafish intersegmental vessel dysmorphogenesis that was rescued by Notch blockade. CONCLUSIONS Elevated Notch signaling downstream of perturbed VEGF signaling contributes to aberrant flt-1(-/-) blood vessel formation. Notch signaling may be dispensable for blood vessel formation when VEGF signaling is below a critical threshold.
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Affiliation(s)
- John C Chappell
- Department of Biology, The University of North Carolina at Chapel Hill, NC 27599, USA
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93
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Dang LTH, Lawson ND, Fish JE. MicroRNA control of vascular endothelial growth factor signaling output during vascular development. Arterioscler Thromb Vasc Biol 2013; 33:193-200. [PMID: 23325476 DOI: 10.1161/atvbaha.112.300142] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The regulated response of endothelial cells to signals in their environment is not only critical for the de novo formation of primordial vascular networks during early development (ie, vasculogenesis), but is also required for the subsequent growth and remodeling of new blood vessels from preexisting ones (ie, angiogenesis). Vascular endothelial growth factors (Vegfs) and their endothelial cell-specific receptors play a crucial role in nearly all aspects of blood vessel growth. How the outputs from these pathways affect and coordinate endothelial behavior is an area of intense research. Recently, numerous studies have highlighted roles for microRNAs in modulating Vegf signaling output in several different contexts. In this review, we will provide an overview of how small RNAs regulate multiple aspects of the Vegf signaling pathway. In particular, we highlight areas where identification of microRNAs and their targets has provided new insight into the role of downstream effectors in modulating Vegf output during development. As Vegf plays a broad role in multiple aspects of endothelial biology and has become a target for therapeutic manipulation of pathological blood vessel growth, microRNAs that affect Vegf signaling output will undoubtedly be major targets of clinical value.
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Affiliation(s)
- Lan T H Dang
- Toronto General Research Institute, University Health Network, Toronto, Ontario, Canada
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94
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Circular RNAs are a large class of animal RNAs with regulatory potency. Nature 2013; 495:333-8. [PMID: 23446348 DOI: 10.1038/nature11928] [Citation(s) in RCA: 5661] [Impact Index Per Article: 514.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 01/24/2013] [Indexed: 02/06/2023]
Abstract
Circular RNAs (circRNAs) in animals are an enigmatic class of RNA with unknown function. To explore circRNAs systematically, we sequenced and computationally analysed human, mouse and nematode RNA. We detected thousands of well-expressed, stable circRNAs, often showing tissue/developmental-stage-specific expression. Sequence analysis indicated important regulatory functions for circRNAs. We found that a human circRNA, antisense to the cerebellar degeneration-related protein 1 transcript (CDR1as), is densely bound by microRNA (miRNA) effector complexes and harbours 63 conserved binding sites for the ancient miRNA miR-7. Further analyses indicated that CDR1as functions to bind miR-7 in neuronal tissues. Human CDR1as expression in zebrafish impaired midbrain development, similar to knocking down miR-7, suggesting that CDR1as is a miRNA antagonist with a miRNA-binding capacity ten times higher than any other known transcript. Together, our data provide evidence that circRNAs form a large class of post-transcriptional regulators. Numerous circRNAs form by head-to-tail splicing of exons, suggesting previously unrecognized regulatory potential of coding sequences.
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95
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Siekmann AF, Affolter M, Belting HG. The tip cell concept 10 years after: new players tune in for a common theme. Exp Cell Res 2013; 319:1255-63. [PMID: 23419245 DOI: 10.1016/j.yexcr.2013.01.019] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Accepted: 01/31/2013] [Indexed: 01/24/2023]
Affiliation(s)
- Arndt F Siekmann
- Max Planck Institute for Molecular Biomedicine, D-48149 Muenster, Germany.
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96
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Blancas AA, Wong LE, Glaser DE, McCloskey KE. Specialized tip/stalk-like and phalanx-like endothelial cells from embryonic stem cells. Stem Cells Dev 2013; 22:1398-407. [PMID: 23249281 DOI: 10.1089/scd.2012.0376] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Endothelial cells (EC) generated in vitro from stem cells are desirable for their potential in a variety of in vitro models and cell-based therapeutic approaches; however, EC can take on a number of functionally and phenotypically distinct specializations. Here, we show the generation of functionally distinct EC subpopulations, including (1) the pro-angiogenic migrating tip-like and proliferative stalk-like EC, and (2) the less migratory cobblestone-shaped phalanx-like EC. Both embryonic stem cell (ESC)-derived EC subpopulations are generated from outgrowths of Flk-1+ vascular progenitor cells with high levels of vascular endothelial growth factor treatment, while the phalanx-like ESC-derived EC (ESC-EC) are subsequently isolated by selecting for cobblestone shape. Compared with the ESC-derived angiogenic endothelial cells (named ESC-AEC) that contain only 14% Flt-1+ and 25% Tie-1+ cells, the selected phalanx-like ESC-EC express higher numbers of cells expressing the phalanx markers Flt-1+ and Tie-1+, 89% and 90%, respectively. The ESC-AEC also contain 35% CXCR4+ tip cells, higher expression levels of stalk marker Notch-1, and lower expression levels of Tie-2 compared with the phalanx-type ESC-EC that do not contain discernible numbers of CXCR4+ tip cells. Perhaps most notably, the ESC-AEC display increased cell migration, proliferation, and 3 times more vessel-like structures after 48 h on Matrigel compared with the phalanx-like ESC-EC. This work analyzes, for the first time, the presence of distinct EC subtypes (tip/stalk, and phalanx) generated in vitro from ESC, and shows that phalanx-like EC can be purified and maintained in culture separate from the tip/stalk-like containing EC.
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Affiliation(s)
- Alicia A Blancas
- Graduate Program in Quantitative and Systems Biology, University of California , Merced, California, USA
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97
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Both Kdr and Flt1 play a vital role in hypoxia-induced Src-PLD1-PKCγ-cPLA(2) activation and retinal neovascularization. Blood 2013; 121:1911-23. [PMID: 23319572 DOI: 10.1182/blood-2012-03-419234] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
To understand the mechanisms of Src-PLD1-PKCγ-cPLA2 activation by vascular endothelial growth factor A (VEGFA), we studied the role of Kdr and Flt1. VEGFA, while having no effect on Flt1 phosphorylation, induced Kdr phosphorylation in human retinal microvascular endothelial cells (HRMVECs). Depletion of Kdr attenuated VEGFA-induced Src-PLD1-PKCγ-cPLA2 activation. Regardless of its phosphorylation state, downregulation of Flt1 also inhibited VEGFA-induced Src-PLD1-PKCγ-cPLA2 activation, but only modestly. In line with these findings, depletion of either Kdr or Flt1 suppressed VEGFA-induced DNA synthesis, migration, and tube formation, albeit more robustly with Kdr downregulation. Hypoxia induced tyrosine phosphorylation of Kdr and Flt1 in mouse retina, and depletion of Kdr or Flt1 blocked hypoxia-induced Src-PLD1-PKCγ-cPLA2 activation and retinal neovascularization. VEGFB induced Flt1 tyrosine phosphorylation and Src-PLD1-PKCγ-cPLA2 activation in HRMVECs. Hypoxia induced VEGFA and VEGFB expression in retina, and inhibition of their expression blocked hypoxia-induced Kdr and Flt1 activation, respectively. Furthermore, depletion of VEGFA or VEGFB attenuated hypoxia-induced Src-PLD1-PKCγ-cPLA2 activation and retinal neovascularization. These findings suggest that although VEGFA, through Kdr and Flt1, appears to be the major modulator of Src-PLD1-PKCγ-cPLA2 signaling in HRMVECs, facilitating their angiogenic events in vitro, both VEGFA and VEGFB mediate hypoxia-induced Src-PLD1-PKCγ-cPLA2 activation and retinal neovascularization via activation of Kdr and Flt1, respectively.
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98
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Blanco R, Gerhardt H. VEGF and Notch in tip and stalk cell selection. Cold Spring Harb Perspect Med 2013; 3:a006569. [PMID: 23085847 DOI: 10.1101/cshperspect.a006569] [Citation(s) in RCA: 381] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sprouting angiogenesis is a dynamic process in which endothelial cells collectively migrate, shape new lumenized tubes, make new connections, and remodel the nascent network into a hierarchically branched and functionally perfused vascular bed. Endothelial cells in the nascent sprout adopt two distinct cellular phenotypes--known as tip and stalk cells--with specialized functions and gene expression patterns. VEGF and Notch signaling engage in an intricate cross talk to balance tip and stalk cell formation and to regulate directed tip cell migration and stalk cell proliferation. In this article, we summarize the current knowledge and implications of the tip/stalk cell concepts and the quantitative and dynamic integration of VEGF and Notch signaling in tip and stalk cell selection.
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Affiliation(s)
- Raquel Blanco
- Vascular Biology Laboratory, London Research Institute, Lincoln's Inn Fields Laboratories, London WC2A 3LY, UK
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99
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Nakhaei-Nejad M, Haddad G, Zhang QX, Murray AG. Facio-Genital Dysplasia-5 Regulates Matrix Adhesion and Survival of Human Endothelial Cells. Arterioscler Thromb Vasc Biol 2012; 32:2694-701. [DOI: 10.1161/atvbaha.112.300074] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
| | - George Haddad
- From the Department of Medicine, University of Alberta, Edmonton, Canada
| | - Qiu-Xia Zhang
- From the Department of Medicine, University of Alberta, Edmonton, Canada
| | - Allan G. Murray
- From the Department of Medicine, University of Alberta, Edmonton, Canada
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100
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Siemerink MJ, Klaassen I, Van Noorden CJF, Schlingemann RO. Endothelial tip cells in ocular angiogenesis: potential target for anti-angiogenesis therapy. J Histochem Cytochem 2012; 61:101-15. [PMID: 23092791 PMCID: PMC3636692 DOI: 10.1369/0022155412467635] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Endothelial tip cells are leading cells at the tips of vascular sprouts coordinating multiple processes during angiogenesis. In the developing retina, tip cells play a tightly controlled, timely role in angiogenesis. In contrast, excessive numbers of tip cells are a characteristic of the chaotic pathological blood vessels in proliferative retinopathies. Tip cells control adjacent endothelial cells in a hierarchical manner to form the stalk of the sprouting vessel, using, among others, the VEGF-DLL-Notch signaling pathway, and recruit pericytes. Tip cells are guided toward avascular areas by signals from the local extracellular matrix that are released by cells from the neuroretina such as astrocytes. Recently, tip cells were identified in endothelial cell cultures, enabling identification of novel molecular markers and mechanisms involved in tip cell biology. These mechanisms are relevant for understanding proliferative retinopathies. Agents that primarily target tip cells can block pathological angiogenesis in the retina efficiently and safely without adverse effects. A striking example is platelet-derived growth factor, which was recently shown to be an efficacious additional target in the treatment of retinal neovascularization. Here we discuss these and other tip cell-based strategies with respect to their potential to treat patients with ocular diseases dominated by neovascularization.
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Affiliation(s)
- Martin J Siemerink
- Ocular Angiogenesis Group, Department of Ophthalmology and Department of Cell Biology and Histology, University of Amsterdam, Academic Medical Center, Amsterdam, The Netherlands
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