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Oppenheim O, Giese W, Park H, Baumann E, Ivanov A, Beule D, Eichmann A, Gerhardt H. Divergent endothelial mechanisms drive arteriovenous malformations in Alk1 and SMAD4 loss-of-function. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2025:2025.01.03.631070. [PMID: 39829872 PMCID: PMC11741317 DOI: 10.1101/2025.01.03.631070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2025]
Abstract
Hereditary hemorrhagic telangiectasia is an autosomal dominant disorder caused by mutations in the bone morphogenetic protein signaling pathway, leading to arteriovenous malformations. While previously thought to share molecular and cellular dysregulation, this study reveals highly distinct mechanisms depending on whether mutations occur in Alk1 or SMAD4. Loss of SMAD4 enhances endothelial cell responses to flow, including flow-regulated transcription and cell migration against blood flow, causing excessive pruning of capillaries and the formation of single large shunts. Conversely, Alk1 deficiency disrupts endothelial flow responses, including cell polarization and directional migration, leading to a dense vascular network and the persistence of a malformation nidus. In vivo cell population tracking of mutant cells validates unique endothelial cell migration defects. Mosaic cell culture models further illustrate that mutant cells co-opt wild-type cells driving distinct Alk1 or SMAD4 mutant-like behavioral defects. These findings demonstrate that arteriovenous malformations develop through fundamentally different cellular mechanisms based on the specific genetic mutation emphasizing the need for tailored diagnostic and therapeutic strategies.
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Affiliation(s)
- Olya Oppenheim
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Berlin, Germany
- Charité Universitätsmedizin Berlin, Germany
| | - Wolfgang Giese
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Berlin, Germany
| | - Hyojin Park
- Department of Molecular and Cellular Physiology, Yale University School of Medicine, New Haven, CT, USA
| | - Elisabeth Baumann
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Berlin, Germany
- Charité Universitätsmedizin Berlin, Germany
| | - Andranik Ivanov
- Charité Universitätsmedizin Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Dieter Beule
- Charité Universitätsmedizin Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Anne Eichmann
- Cardiovascular Research Center, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, USA
- Department of Molecular and Cellular Physiology, Yale University School of Medicine, New Haven, CT, USA
- PARCC, INSERM, Université de Paris, Paris, France
| | - Holger Gerhardt
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- German Center for Cardiovascular Research (DZHK), Berlin, Germany
- Charité Universitätsmedizin Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
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2
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Niihori M, James J, Varghese MV, McClain N, Lawal OS, Philip RC, Baggett BK, Goncharov DA, de Jesus Perez V, Goncharova EA, Rafikov R, Rafikova O. Mitochondria as a primary determinant of angiogenic modality in pulmonary arterial hypertension. J Exp Med 2024; 221:e20231568. [PMID: 39320470 PMCID: PMC11452743 DOI: 10.1084/jem.20231568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Revised: 03/27/2024] [Accepted: 08/19/2024] [Indexed: 09/26/2024] Open
Abstract
Impaired pulmonary angiogenesis plays a pivotal role in the progression of pulmonary arterial hypertension (PAH) and patient mortality, yet the molecular mechanisms driving this process remain enigmatic. Our study uncovered a striking connection between mitochondrial dysfunction (MD), caused by a humanized mutation in the NFU1 gene, and severely disrupted pulmonary angiogenesis in adult lungs. Restoring the bioavailability of the NFU1 downstream target, lipoic acid (LA), alleviated MD and angiogenic deficiency and rescued the progressive PAH phenotype in the NFU1G206C model. Notably, significant NFU1 expression and signaling insufficiencies were also identified in idiopathic PAH (iPAH) patients' lungs, emphasizing this study's relevance beyond NFU1 mutation cases. The remarkable improvement in mitochondrial function of PAH patient-derived pulmonary artery endothelial cells (PAECs) following LA supplementation introduces LA as a potential therapeutic approach. In conclusion, this study unveils a novel role for MD in dysregulated pulmonary angiogenesis and PAH manifestation, emphasizing the need to correct MD in PAH patients with unrecognized NFU1/LA deficiency.
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Affiliation(s)
- Maki Niihori
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA
| | - Joel James
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA
| | - Mathews V. Varghese
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA
| | - Nolan McClain
- Department of Medicine, University of Arizona, Tucson, AZ, USA
| | - Odunayo Susan Lawal
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA
| | - Rohit C. Philip
- Department of Electrical and Computer Engineering, University of Arizona College of Engineering, Tucson, AZ, USA
- Department of Medical Imaging, University of Arizona College of Medicine, Tucson, AZ, USA
| | - Brenda K. Baggett
- The University of Arizona Cancer Center, University of Arizona, Tucson, AZ, USA
| | - Dmitry A. Goncharov
- Division of Pulmonary, Critical Care and Sleep Medicine, Lung Center, University of California, Davis School of Medicine, Davis, CA, USA
| | - Vinicio de Jesus Perez
- Division of Pulmonary and Critical Care Medicine, Stanford University Medical Center, Stanford, CA, USA
| | - Elena A. Goncharova
- Division of Pulmonary, Critical Care and Sleep Medicine, Lung Center, University of California, Davis School of Medicine, Davis, CA, USA
| | - Ruslan Rafikov
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA
| | - Olga Rafikova
- Division of Pulmonary, Critical Care, Sleep and Occupational Medicine, Department of Medicine, Indiana University, Indianapolis, IN, USA
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3
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Wen L, Yan W, Zhu L, Tang C, Wang G. The role of blood flow in vessel remodeling and its regulatory mechanism during developmental angiogenesis. Cell Mol Life Sci 2023; 80:162. [PMID: 37221410 PMCID: PMC11072276 DOI: 10.1007/s00018-023-04801-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 04/06/2023] [Accepted: 05/06/2023] [Indexed: 05/25/2023]
Abstract
Vessel remodeling is essential for a functional and mature vascular network. According to the difference in endothelial cell (EC) behavior, we classified vessel remodeling into vessel pruning, vessel regression and vessel fusion. Vessel remodeling has been proven in various organs and species, such as the brain vasculature, subintestinal veins (SIVs), and caudal vein (CV) in zebrafish and yolk sac vessels, retina, and hyaloid vessels in mice. ECs and periendothelial cells (such as pericytes and astrocytes) contribute to vessel remodeling. EC junction remodeling and actin cytoskeleton dynamic rearrangement are indispensable for vessel pruning. More importantly, blood flow has a vital role in vessel remodeling. In recent studies, several mechanosensors, such as integrins, platelet endothelial cell adhesion molecule-1 (PECAM-1)/vascular endothelial cell (VE-cadherin)/vascular endothelial growth factor receptor 2 (VEGFR2) complex, and notch1, have been shown to contribute to mechanotransduction and vessel remodeling. In this review, we highlight the current knowledge of vessel remodeling in mouse and zebrafish models. We further underline the contribution of cellular behavior and periendothelial cells to vessel remodeling. Finally, we discuss the mechanosensory complex in ECs and the molecular mechanisms responsible for vessel remodeling.
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Affiliation(s)
- Lin Wen
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
| | - Wenhua Yan
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China
| | - Li Zhu
- Cyrus Tang Hematology Center, Cyrus Tang Medical Institute, Collaborative Innovation Center of Hematology of Jiangsu Province, Soochow University, Suzhou, 215123, China
| | - Chaojun Tang
- Cyrus Tang Hematology Center, Cyrus Tang Medical Institute, Collaborative Innovation Center of Hematology of Jiangsu Province, Soochow University, Suzhou, 215123, China.
| | - Guixue Wang
- Key Laboratory for Biorheological Science and Technology of Ministry of Education, State and Local Joint Engineering Laboratory for Vascular Implants, Bioengineering College of Chongqing University, Chongqing, 400030, China.
- JinFeng Laboratory, Chongqing, 401329, China.
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4
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Barrasa-Ramos S, Dessalles CA, Hautefeuille M, Barakat AI. Mechanical regulation of the early stages of angiogenesis. J R Soc Interface 2022; 19:20220360. [PMID: 36475392 PMCID: PMC9727679 DOI: 10.1098/rsif.2022.0360] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Favouring or thwarting the development of a vascular network is essential in fields as diverse as oncology, cardiovascular disease or tissue engineering. As a result, understanding and controlling angiogenesis has become a major scientific challenge. Mechanical factors play a fundamental role in angiogenesis and can potentially be exploited for optimizing the architecture of the resulting vascular network. Largely focusing on in vitro systems but also supported by some in vivo evidence, the aim of this Highlight Review is dual. First, we describe the current knowledge with particular focus on the effects of fluid and solid mechanical stimuli on the early stages of the angiogenic process, most notably the destabilization of existing vessels and the initiation and elongation of new vessels. Second, we explore inherent difficulties in the field and propose future perspectives on the use of in vitro and physics-based modelling to overcome these difficulties.
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Affiliation(s)
- Sara Barrasa-Ramos
- LadHyX, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
| | - Claire A. Dessalles
- LadHyX, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
| | - Mathieu Hautefeuille
- Laboratoire de Biologie du Développement (UMR7622), Institut de Biologie Paris Seine, Sorbonne Université, Paris, France,Facultad de Ciencias, Universidad Nacional Autónoma de México, CDMX, Mexico
| | - Abdul I. Barakat
- LadHyX, CNRS, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
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5
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Wikslund LK, Kaljusto M, Amundsen VS, Kvernebo K. Microvascular remodeling following skin injury. Microcirculation 2022; 29:e12755. [PMID: 35231135 PMCID: PMC9788271 DOI: 10.1111/micc.12755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 02/01/2022] [Accepted: 02/15/2022] [Indexed: 12/30/2022]
Abstract
OBJECTIVE The aim of this study was to describe possible remodeling (i.e., dilatation and elongation) of papillary capillaries induced by increased oxygen demand for the repair process following a skin wound. METHODS Computer-assisted video microscopy was used to examine 10 healthy volunteers before (baseline) and after (≈1 h and ≈24 h) an incision (5 mm long and 1 mm deep) on the forearm, 0-1 mm and 30 mm (control site) from the incision. We defined categories from 0 (low) to 3 (high) to grade dilatation and elongation of the nutritive papillary capillaries, as well as the visibility of the superficial vascular plexus. Approximately 10 000 capillaries from 200 films were scored. RESULTS The nutritive papillary capillaries were dilated and elongated (p < 0.01) after ≈24 h; that is, elongation (score 1.9 ± 0.9) vs baseline (score 0.9 ± 0.6), p < 0.01 and dilatation (score 2.2 ± 0.7) vs baseline (score 0.3 ± 0.3), p < 0.01. Superficial plexus visibility increased (p < 0.01) after ≈1 h (score 2.0 ± 0.7) and ≈24 h (score 2.7 ± 0.3) vs baseline (score 0.8 ± 0.4). CONCLUSION The superficial vascular skin plexus showed enhanced visibility already ≈1 h after the skin trauma. Morphological remodeling in the nutritive papillary capillaries-dilatation and elongation after ≈24 h-facilitate increased O2 supply.
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Affiliation(s)
- Liv Kristin Wikslund
- Ostfold Hospital TrustGralumNorway,Circulation laboratoryDepartment of Cardio‐thoracic SurgeryOslo University HospitalUllevaalNorway,Medical FacultyUniversity of OsloOsloNorway
| | | | - Vivian Shubira Amundsen
- Circulation laboratoryDepartment of Cardio‐thoracic SurgeryOslo University HospitalUllevaalNorway
| | - Knut Kvernebo
- Circulation laboratoryDepartment of Cardio‐thoracic SurgeryOslo University HospitalUllevaalNorway,Medical FacultyUniversity of OsloOsloNorway,Department of Cardiothoracic SurgeryOslo University HospitalOsloNorway
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6
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Kulikauskas MR, X S, Bautch VL. The versatility and paradox of BMP signaling in endothelial cell behaviors and blood vessel function. Cell Mol Life Sci 2022; 79:77. [PMID: 35044529 PMCID: PMC8770421 DOI: 10.1007/s00018-021-04033-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 10/20/2021] [Accepted: 11/09/2021] [Indexed: 12/15/2022]
Abstract
Blood vessels expand via sprouting angiogenesis, and this process involves numerous endothelial cell behaviors, such as collective migration, proliferation, cell–cell junction rearrangements, and anastomosis and lumen formation. Subsequently, blood vessels remodel to form a hierarchical network that circulates blood and delivers oxygen and nutrients to tissue. During this time, endothelial cells become quiescent and form a barrier between blood and tissues that regulates transport of liquids and solutes. Bone morphogenetic protein (BMP) signaling regulates both proangiogenic and homeostatic endothelial cell behaviors as blood vessels form and mature. Almost 30 years ago, human pedigrees linked BMP signaling to diseases associated with blood vessel hemorrhage and shunts, and recent work greatly expanded our knowledge of the players and the effects of vascular BMP signaling. Despite these gains, there remain paradoxes and questions, especially with respect to how and where the different and opposing BMP signaling outputs are regulated. This review examines endothelial cell BMP signaling in vitro and in vivo and discusses the paradox of BMP signals that both destabilize and stabilize endothelial cell behaviors.
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Affiliation(s)
- Molly R Kulikauskas
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Shaka X
- Department of Biology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA
- Department of Biomedical Engineering, Yale University, New Haven, CT, USA
| | - Victoria L Bautch
- Curriculum in Cell Biology and Physiology, The University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.
- Department of Biology, 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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7
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From remodeling to quiescence: The transformation of the vascular network. Cells Dev 2021; 168:203735. [PMID: 34425253 DOI: 10.1016/j.cdev.2021.203735] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/14/2021] [Accepted: 08/16/2021] [Indexed: 12/15/2022]
Abstract
The vascular system is essential for embryogenesis, healing, and homeostasis. Dysfunction or deregulated blood vessel function contributes to multiple diseases, including diabetic retinopathy, cancer, hypertension, or vascular malformations. A balance between the formation of new blood vessels, vascular remodeling, and vessel quiescence is fundamental for tissue growth and function. Whilst the major mechanisms contributing to the formation of new blood vessels have been well explored in recent years, vascular remodeling and quiescence remain poorly understood. In this review, we highlight the cellular and molecular mechanisms responsible for vessel remodeling and quiescence during angiogenesis. We further underline how impaired remodeling and/or destabilization of vessel networks can contribute to vascular pathologies. Finally, we speculate how addressing the molecular mechanisms of vascular remodeling and stabilization could help to treat vascular-related disorders.
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8
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Kugler E, Snodgrass R, Bowley G, Plant K, Serbanovic-Canic J, Hamilton N, Evans PC, Chico T, Armitage P. The effect of absent blood flow on the zebrafish cerebral and trunk vasculature. VASCULAR BIOLOGY (BRISTOL, ENGLAND) 2021; 3:1-16. [PMID: 34522840 PMCID: PMC8428019 DOI: 10.1530/vb-21-0009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 07/29/2021] [Indexed: 12/18/2022]
Abstract
The role of blood flow in vascular development is complex and context-dependent. In this study, we quantify the effect of the lack of blood flow on embryonic vascular development on two vascular beds, namely the cerebral and trunk vasculature in zebrafish. We perform this by analysing vascular topology, endothelial cell (EC) number, EC distribution, apoptosis, and inflammatory response in animals with normal blood flow or absent blood flow. We find that absent blood flow reduced vascular area and EC number significantly in both examined vascular beds, but the effect is more severe in the cerebral vasculature, and severity increases over time. Absent blood flow leads to an increase in non-EC-specific apoptosis without increasing tissue inflammation, as quantified by cerebral immune cell numbers and nitric oxide. Similarly, while stereotypic vascular patterning in the trunk is maintained, intra-cerebral vessels show altered patterning, which is likely to be due to vessels failing to initiate effective fusion and anastomosis rather than sprouting or path-seeking. In conclusion, blood flow is essential for cellular survival in both the trunk and cerebral vasculature, but particularly intra-cerebral vessels are affected by the lack of blood flow, suggesting that responses to blood flow differ between these two vascular beds.
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Affiliation(s)
- Elisabeth Kugler
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
- Insigneo Institute for in silico Medicine, Sheffield, UK
- Institute of Ophthalmology, Faculty of Brain Sciences, University College London, London, UK
| | - Ryan Snodgrass
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
| | - George Bowley
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
| | - Karen Plant
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
| | - Jovana Serbanovic-Canic
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
| | - Noémie Hamilton
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
| | - Paul C Evans
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
- Insigneo Institute for in silico Medicine, Sheffield, UK
| | - Timothy Chico
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- The Bateson Centre, Firth Court, University of Sheffield, Western Bank, Sheffield, UK
| | - Paul Armitage
- Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield, Medical School, Sheffield, UK
- Insigneo Institute for in silico Medicine, Sheffield, UK
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9
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Hebert JF, Millar JA, Raghavan R, Romney A, Podrabsky JE, Rennie MY, Felker AM, O'Tierney-Ginn P, Morita M, DuPriest EA, Morgan TK. Male fetal sex affects uteroplacental angiogenesis in growth restriction mouse model†. Biol Reprod 2021; 104:924-934. [PMID: 33459759 DOI: 10.1093/biolre/ioab006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 12/11/2020] [Accepted: 01/13/2021] [Indexed: 01/28/2023] Open
Abstract
Abnormally increased angiotensin II activity related to maternal angiotensinogen (AGT) genetic variants, or aberrant receptor activation, is associated with small-for-gestational-age babies and abnormal uterine spiral artery remodeling in humans. Our group studies a murine AGT gene titration transgenic (TG; 3-copies of the AGT gene) model, which has a 20% increase in AGT expression mimicking a common human AGT genetic variant (A[-6]G) associated with intrauterine growth restriction (IUGR) and spiral artery pathology. We hypothesized that aberrant maternal AGT expression impacts pregnancy-induced uterine spiral artery angiogenesis in this mouse model leading to IUGR. We controlled for fetal sex and fetal genotype (e.g., only 2-copy wild-type [WT] progeny from WT and TG dams were included). Uteroplacental samples from WT and TG dams from early (days 6.5 and 8.5), mid (d12.5), and late (d16.5) gestation were studied to assess uterine natural killer (uNK) cell phenotypes, decidual metrial triangle angiogenic factors, placental growth and capillary density, placental transcriptomics, and placental nutrient transport. Spiral artery architecture was evaluated at day 16.5 by contrast-perfused three-dimensional microcomputed tomography (3D microCT). Our results suggest that uteroplacental angiogenesis is significantly reduced in TG dams at day 16.5. Males from TG dams are associated with significantly reduced uteroplacental angiogenesis from early to late gestation compared with their female littermates and WT controls. Angiogenesis was not different between fetal sexes from WT dams. We conclude that male fetal sex compounds the pathologic impact of maternal genotype in this mouse model of growth restriction.
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Affiliation(s)
- Jessica F Hebert
- Department of Pathology, Oregon Health & Science University, Portland, OR, USA.,Center for Developmental Health, Oregon Health & Science University, Portland, OR, USA.,Department of Biology, Portland State University, Portland, OR, USA
| | - Jess A Millar
- Department of Biology, Portland State University, Portland, OR, USA
| | - Rahul Raghavan
- Department of Biology, Portland State University, Portland, OR, USA
| | - Amie Romney
- Department of Biology, Portland State University, Portland, OR, USA
| | | | - Monique Y Rennie
- Center for Developmental Health, Oregon Health & Science University, Portland, OR, USA
| | - Allison M Felker
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | | | - Mayu Morita
- Department of Pathology, Oregon Health & Science University, Portland, OR, USA.,Center for Developmental Health, Oregon Health & Science University, Portland, OR, USA
| | - Elizabeth A DuPriest
- Center for Developmental Health, Oregon Health & Science University, Portland, OR, USA.,Division of Natural Sciences and Health, Warner Pacific University, Portland, OR, USA
| | - Terry K Morgan
- Department of Pathology, Oregon Health & Science University, Portland, OR, USA.,Center for Developmental Health, Oregon Health & Science University, Portland, OR, USA
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10
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Jones VM, Suarez-Martinez AD, Hodges NA, Murfee WL, Llull R, Katz AJ. A clinical perspective on adipose-derived cell therapy for enhancing microvascular health and function: Implications and applications for reconstructive surgery. Microcirculation 2020; 28:e12672. [PMID: 33174272 DOI: 10.1111/micc.12672] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 09/18/2020] [Accepted: 11/04/2020] [Indexed: 12/21/2022]
Abstract
Restoration of form and function requires apposition of tissues in the form of flaps to reconstitute local perfusion. Successful reconstruction relies on flap survival and its integration with the recipient bed. The flap's precariously perfused hypoxic areas undergo adaptive microvascular changes both internally and in connection with the recipient bed. A cell-mediated, coordinated response to hypoxia drives these adaptive processes, restoring a tissue's normoxic homeostasis via de novo vasculogenesis, sprouting angiogenesis, and stabilizing arterialization. As cells exert prolonged and coordinated effects on site, their use as biological agents merit translational consideration of sourcing angio-competent cells and delivering them to territories enduring microcirculatory acclimatization. Angio-competent cells abound in adipose tissue: a reliable, accessible, and expendable source of adipose-derived cells (ADC). When subject to enzymatic digestion and centrifugation, adipose tissue separates its various ADC: A subset of buoyant oil-dense adipocytes (the tissue's parenchymal component) accumulates on a supra-natant layer, whereas the mesenchymal component remains in the infra-natant sediment, containing the tissue's stromal vascular fraction (SVF), where angio-component cells abound. The SVF can be further manipulated, selected, or culture expanded into more specific stromal subsets (herein defined as adipose stromal cells, ASC). While promising clinical applications for ADC await clinical proof and regulatory authorization, basic science investigation is needed to elucidate the specific ADC mechanisms that influence microvascular growth, remodeling, and function following flap surgery. The objective of this article is to share the clinical perspectives of reconstructive plastic surgeons regarding the use of ADC-based therapies to help with flap tissue integration, revascularization, and wound healing. Specifically, the focus will be on considering the potential for ADC as therapeutic agents and how their clinical application motivates basic science opportunities.
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Affiliation(s)
- V Morgan Jones
- Department of Surgery, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Ariana D Suarez-Martinez
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Nicholas A Hodges
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Walter L Murfee
- J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, USA
| | - Ramon Llull
- Department of Plastic Surgery, Hospital Quiron Salud PalmaPlanas, Palma, Spain
| | - Adam J Katz
- Department of Plastic and Reconstructive Surgery, Wake Forest School of Medicine, Winston-Salem, NC, USA
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11
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Santamaría R, González-Álvarez M, Delgado R, Esteban S, Arroyo AG. Remodeling of the Microvasculature: May the Blood Flow Be With You. Front Physiol 2020; 11:586852. [PMID: 33178049 PMCID: PMC7593767 DOI: 10.3389/fphys.2020.586852] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/09/2020] [Indexed: 12/12/2022] Open
Abstract
The vasculature ensures optimal delivery of nutrients and oxygen throughout the body, and to achieve this function it must continually adapt to varying tissue demands. Newly formed vascular plexuses during development are immature and require dynamic remodeling to generate well-patterned functional networks. This is achieved by remodeling of the capillaries preserving those which are functional and eliminating other ones. A balanced and dynamically regulated capillary remodeling will therefore ensure optimal distribution of blood and nutrients to the tissues. This is particularly important in pathological contexts in which deficient or excessive vascular remodeling may worsen tissue perfusion and hamper tissue repair. Blood flow is a major determinant of microvascular reshaping since capillaries are pruned when relatively less perfused and they split when exposed to high flow in order to shape the microvascular network for optimal tissue perfusion and oxygenation. The molecular machinery underlying blood flow sensing by endothelial cells is being deciphered, but much less is known about how this translates into endothelial cell responses as alignment, polarization and directed migration to drive capillary remodeling, particularly in vivo. Part of this knowledge is theoretical from computational models since blood flow hemodynamics are not easily recapitulated by in vitro or ex vivo approaches. Moreover, these events are difficult to visualize in vivo due to their infrequency and briefness. Studies had been limited to postnatal mouse retina and vascular beds in zebrafish but new tools as advanced microscopy and image analysis are strengthening our understanding of capillary remodeling. In this review we introduce the concept of remodeling of the microvasculature and its relevance in physiology and pathology. We summarize the current knowledge on the mechanisms contributing to capillary regression and to capillary splitting highlighting the key role of blood flow to orchestrate these processes. Finally, we comment the potential and possibilities that microfluidics offers to this field. Since capillary remodeling mechanisms are often reactivated in prevalent pathologies as cancer and cardiovascular disease, all this knowledge could be eventually used to improve the functionality of capillary networks in diseased tissues and promote their repair.
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Affiliation(s)
- Ricardo Santamaría
- Department of Vascular Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - María González-Álvarez
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), Madrid, Spain
| | - Raquel Delgado
- Department of Vascular Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Sergio Esteban
- Department of Vascular Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Alicia G. Arroyo
- Department of Vascular Pathophysiology, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
- Department of Molecular Biomedicine, Centro de Investigaciones Biológicas Margarita Salas (CIB-CSIC), Madrid, Spain
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12
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Hanidziar D, Robson SC. Hyperoxia and modulation of pulmonary vascular and immune responses in COVID-19. Am J Physiol Lung Cell Mol Physiol 2020; 320:L12-L16. [PMID: 33050737 PMCID: PMC7816427 DOI: 10.1152/ajplung.00304.2020] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Oxygen is the most commonly used therapy in hospitalized patients with COVID-19. In those patients who develop worsening pneumonia and acute respiratory distress syndrome (ARDS), high concentrations of oxygen may need to be administered for prolonged time periods, often together with mechanical ventilation. Hyperoxia, although lifesaving and essential for maintaining adequate oxygenation in the short term, may have adverse long-term consequences upon lung parenchymal structure and function. How hyperoxia per se impacts lung disease in COVID-19 has remained largely unexplored. Numbers of experimental studies have previously established that hyperoxia is associated with deleterious outcomes inclusive of perturbations in immunologic responses, abnormal metabolic function, and alterations in hemodynamics and alveolar barrier function. Such changes may ultimately progress into clinically evident lung injury and adverse remodeling and result in parenchymal fibrosis when exposure is prolonged. Given that significant exposure to hyperoxia in patients with severe COVID-19 may be unavoidable to preserve life, these sequelae of hyperoxia, superimposed on the cytopathic effects of SARS-CoV-2 virus, may well impact pathogenesis of COVID-19-induced ARDS.
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Affiliation(s)
- Dusan Hanidziar
- Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts
| | - Simon C Robson
- Department of Anesthesia, Critical Care and Pain Medicine, Center for Inflammation Research, Beth Israel Deaconess Medical Center, Boston, Massachusetts.,Department of Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts
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13
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An inhibitor of endothelial ETS transcription factors promotes physiologic and therapeutic vessel regression. Proc Natl Acad Sci U S A 2020; 117:26494-26502. [PMID: 33020273 DOI: 10.1073/pnas.2015980117] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
During the progression of ocular diseases such as retinopathy of prematurity and diabetic retinopathy, overgrowth of retinal blood vessels results in the formation of pathological neovascular tufts that impair vision. Current therapeutic options for treating these diseases include antiangiogenic strategies that can lead to the undesirable inhibition of normal vascular development. Therefore, strategies that eliminate pathological neovascular tufts while sparing normal blood vessels are needed. In this study we exploited the hyaloid vascular network in murine eyes, which naturally undergoes regression after birth, to gain mechanistic insights that could be therapeutically adapted for driving neovessel regression in ocular diseases. We found that endothelial cells of regressing hyaloid vessels underwent down-regulation of two structurally related E-26 transformation-specific (ETS) transcription factors, ETS-related gene (ERG) and Friend leukemia integration 1 (FLI1), prior to apoptosis. Moreover, the small molecule YK-4-279, which inhibits the transcriptional and biological activity of ETS factors, enhanced hyaloid regression in vivo and drove Human Umbilical Vein Endothelial Cells (HUVEC) tube regression and apoptosis in vitro. Importantly, exposure of HUVECs to sheer stress inhibited YK-4-279-induced apoptosis, indicating that low-flow vessels may be uniquely susceptible to YK-4-279-mediated regression. We tested this hypothesis by administering YK-4-279 to mice in an oxygen-induced retinopathy model that generates disorganized and poorly perfused neovascular tufts that mimic human ocular diseases. YK-4-279 treatment significantly reduced neovascular tufts while sparing healthy retinal vessels, thereby demonstrating the therapeutic potential of this inhibitor.
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14
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Sano H, Watanabe M, Yamashita T, Tanishita K, Sudo R. Control of vessel diameters mediated by flow-induced outward vascular remodeling in vitro. Biofabrication 2020; 12:045008. [DOI: 10.1088/1758-5090/ab9316] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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15
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Kirkton RD, Santiago-Maysonet M, Lawson JH, Tente WE, Dahl SLM, Niklason LE, Prichard HL. Bioengineered human acellular vessels recellularize and evolve into living blood vessels after human implantation. Sci Transl Med 2020; 11:11/485/eaau6934. [PMID: 30918113 DOI: 10.1126/scitranslmed.aau6934] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 03/06/2019] [Indexed: 12/13/2022]
Abstract
Traditional vascular grafts constructed from synthetic polymers or cadaveric human or animal tissues support the clinical need for readily available blood vessels, but often come with associated risks. Histopathological evaluation of these materials has shown adverse host cellular reactions and/or mechanical degradation due to insufficient or inappropriate matrix remodeling. We developed an investigational bioengineered human acellular vessel (HAV), which is currently being studied as a hemodialysis conduit in patients with end-stage renal disease. In rare cases, small samples of HAV were recovered during routine surgical interventions and used to examine the temporal and spatial pattern of the host cell response to the HAV after implantation, from 16 to 200 weeks. We observed a substantial influx of alpha smooth muscle actin (αSMA)-expressing cells into the HAV that progressively matured and circumferentially aligned in the HAV wall. These cells were supported by microvasculature initially formed by CD34+/CD31+ cells in the neoadventitia and later maintained by CD34-/CD31+ endothelial cells in the media and lumen of the HAV. Nestin+ progenitor cells differentiated into either αSMA+ or CD31+ cells and may contribute to early recellularization and self-repair of the HAV. A mesenchymal stem cell-like CD90+ progenitor cell population increased in number with duration of implantation. Our results suggest that host myogenic, endothelial, and progenitor cell repopulation of HAVs transforms these previously acellular vessels into functional multilayered living tissues that maintain blood transport and exhibit self-healing after cannulation injury, effectively rendering these vessels like the patient's own blood vessel.
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Affiliation(s)
| | | | - Jeffrey H Lawson
- Humacyte Inc., Durham, NC 27713, USA.,Departments of Surgery and Pathology, Duke University Medical Center, Durham, NC 27710, USA
| | | | | | - Laura E Niklason
- Humacyte Inc., Durham, NC 27713, USA.,Departments of Anesthesiology and Biomedical Engineering, Yale University, New Haven, CT 06511, USA
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16
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Yu T, Zhang F, Wu Y, Chen J, Dai L, Li F, Liu X, Liu C, Zhao J. Detailed process analysis for glomerular capillary formation by immunofluorescence on ultra-thick sections. Gene Expr Patterns 2020; 35:119096. [PMID: 32027977 DOI: 10.1016/j.gep.2020.119096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2019] [Revised: 01/08/2020] [Accepted: 01/27/2020] [Indexed: 10/25/2022]
Abstract
Glomerular capillary formation is one of the fundamental mysteries in renal developmental biology. However, there are still debates on this issue, and its detailed formation process has not been clarified. To resolve this problem, we performed antibody staining with ultra-thick section on embryonic and postnatal mouse kidneys. We obtained the expression patterns of several genes that play an important role in the development of glomerular capillaries. We found that blood vessel of the fetal kidneys expanded through proliferation and sprouting. During the comma-stage and S-shaped stage, 3-4 capillaries began to bud and migrate into the glomerular cleft, forming a capillary bed in the Bowman's capsule. Then, the capillary bed expanded into mature glomerular capillary by intussusceptive angiogenesis. The afferent and efferent arterioles were formed through pruning. The distribution of VEGFA in the nephron epithelial cells but not only in podocytes, induced multiple capillaries sprouted into the glomerular cleft. And CXCR4 played an important role in the differentiation and expansion of capillary bed into glomerular capillary. Immunofluorescence performed with ultra-thick section allowed us to investigate the development of complex structure tissues systematically and comprehensively.
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Affiliation(s)
- Ting Yu
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China; Department of Respiratory Medicine, Xinqiao Hospital, Army Medical University, Chongqing, 400037, PR China
| | - Fang Zhang
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China
| | - Yan Wu
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China
| | - Jianli Chen
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China
| | - Lu Dai
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China
| | - Furong Li
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China
| | - Xiaoliang Liu
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China
| | - Chi Liu
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China.
| | - Jinghong Zhao
- Department of Nephrology, Institute of Nephrology of Chongqing and Kidney Center of PLA, Xinqiao Hospital, Army Medical University, Chongqing, 400037, China.
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17
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Stotesbury H, Kawadler JM, Hales PW, Saunders DE, Clark CA, Kirkham FJ. Vascular Instability and Neurological Morbidity in Sickle Cell Disease: An Integrative Framework. Front Neurol 2019; 10:871. [PMID: 31474929 PMCID: PMC6705232 DOI: 10.3389/fneur.2019.00871] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 07/26/2019] [Indexed: 12/20/2022] Open
Abstract
It is well-established that patients with sickle cell disease (SCD) are at substantial risk of neurological complications, including overt and silent stroke, microstructural injury, and cognitive difficulties. Yet the underlying mechanisms remain poorly understood, partly because findings have largely been considered in isolation. Here, we review mechanistic pathways for which there is accumulating evidence and propose an integrative systems-biology framework for understanding neurological risk. Drawing upon work from other vascular beds in SCD, as well as the wider stroke literature, we propose that macro-circulatory hyper-perfusion, regions of relative micro-circulatory hypo-perfusion, and an exhaustion of cerebral reserve mechanisms, together lead to a state of cerebral vascular instability. We suggest that in this state, tissue oxygen supply is fragile and easily perturbed by changes in clinical condition, with the potential for stroke and/or microstructural injury if metabolic demand exceeds tissue oxygenation. This framework brings together recent developments in the field, highlights outstanding questions, and offers a first step toward a linking pathophysiological explanation of neurological risk that may help inform future screening and treatment strategies.
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Affiliation(s)
- Hanne Stotesbury
- Developmental Neurosciences, UCL Great Ormond Institute of Child Health, London, United Kingdom
| | - Jamie M Kawadler
- Developmental Neurosciences, UCL Great Ormond Institute of Child Health, London, United Kingdom
| | - Patrick W Hales
- Developmental Neurosciences, UCL Great Ormond Institute of Child Health, London, United Kingdom
| | - Dawn E Saunders
- Developmental Neurosciences, UCL Great Ormond Institute of Child Health, London, United Kingdom.,Department of Radiology, Great Ormond Hospital, London, United Kingdom
| | - Christopher A Clark
- Developmental Neurosciences, UCL Great Ormond Institute of Child Health, London, United Kingdom
| | - Fenella J Kirkham
- Developmental Neurosciences, UCL Great Ormond Institute of Child Health, London, United Kingdom.,Clinical and Experimental Sciences, University of Southampton, Southampton, United Kingdom.,Department of Child Health, University Hospital Southampton, Southampton, United Kingdom.,Department of Paediatric Neurology, Kings College Hospital NHS Foundation Trust, London, United Kingdom
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18
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Fitzgerald G, Soro-Arnaiz I, De Bock K. The Warburg Effect in Endothelial Cells and its Potential as an Anti-angiogenic Target in Cancer. Front Cell Dev Biol 2018; 6:100. [PMID: 30255018 PMCID: PMC6141712 DOI: 10.3389/fcell.2018.00100] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 08/09/2018] [Indexed: 12/29/2022] Open
Abstract
Endothelial cells (ECs) make up the lining of our blood vessels and they ensure optimal nutrient and oxygen delivery to the parenchymal tissue. In response to oxygen and/or nutrient deprivation, ECs become activated and sprout into hypo-vascularized tissues forming new vascular networks in a process termed angiogenesis. New sprouts are led by migratory tip cells and extended through the proliferation of trailing stalk cells. Activated ECs rewire their metabolism to cope with the increased energetic and biosynthetic demands associated with migration and proliferation. Moreover, metabolic signaling pathways interact and integrate with angiogenic signaling events. These metabolic adaptations play essential roles in determining EC fate and function, and are perturbed during pathological angiogenesis, as occurs in cancer. The angiogenic switch, or the growth of new blood vessels into an expanding tumor, increases tumor growth and malignancy. Limiting tumor angiogenesis has therefore long been a goal for anticancer therapy but the traditional growth factor targeted anti-angiogenic treatments have met with limited success. In recent years however, it has become increasingly recognized that focusing on altered tumor EC metabolism provides an attractive alternative anti-angiogenic strategy. In this review, we will describe the EC metabolic signature and how changes in EC metabolism affect EC fate during physiological sprouting, as well as in the cancer setting. Then, we will discuss the potential of targeting EC metabolism as a promising approach to develop new anti-cancer therapies.
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Affiliation(s)
- Gillian Fitzgerald
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
| | - Inés Soro-Arnaiz
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
| | - Katrien De Bock
- Laboratory of Exercise and Health, Department of Health Sciences and Technology, Swiss Federal Institute of Technology Zurich, Zurich, Switzerland
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19
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Blache U, Ehrbar M. Inspired by Nature: Hydrogels as Versatile Tools for Vascular Engineering. Adv Wound Care (New Rochelle) 2018; 7:232-246. [PMID: 29984113 PMCID: PMC6032659 DOI: 10.1089/wound.2017.0760] [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: 10/19/2017] [Accepted: 10/22/2017] [Indexed: 12/21/2022] Open
Abstract
Significance: Diseases related to vascular malfunction, hyper-vascularization, or lack of vascularization are among the leading causes of morbidity and mortality. Engineered, vascularized tissues as well as angiogenic growth factor-releasing hydrogels could replace defective tissues. Further, treatments and testing of novel vascular therapeutics will benefit significantly from models that allow for the study of vascularized tissues under physiological relevant in vitro conditions. Recent Advances: Inspired by fibrin, the provisional matrix during wound healing, naturally derived and synthetic hydrogel scaffolds have been developed for vascular engineering. Today, engineers and biologists use commercially available hydrogels to pre-vascularize tissues, to control the delivery of angiogenic growth factors, and to establish vascular diseases models. Critical Issue: For clinical translation, pre-vascularized tissue constructs must be sufficiently large and stable to substitute function-relevant tissue defects and integrate with host vascular perfusion. Moreover, the continuous integration of knowhow from basic vascular biology with innovative, tailorable materials and advanced manufacturing technologies is key to achieving near-physiological tissue models and new treatments to control vascularization. Future Directions: For transplantation, engineered tissues must comprise hierarchically organized vascular trees of different caliber and function. The development of novel vascularization-promoting or -inhibiting therapeutics will benefit from physiologically relevant vessel models. In addition, tissue models representing treatment-relevant vascular tissue functions will increase the capacity to screen for therapeutic compounds and will significantly reduce the need for animals for their validation.
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Affiliation(s)
- Ulrich Blache
- Department of Obstetrics, University and University Hospital Zurich, Zurich, Switzerland
- Department of Health Sciences and Technology, Institute for Biomechanics, ETH Zurich, Zurich, Switzerland
| | - Martin Ehrbar
- Department of Obstetrics, University and University Hospital Zurich, Zurich, Switzerland
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20
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Synergistic interaction of sprouting and intussusceptive angiogenesis during zebrafish caudal vein plexus development. Sci Rep 2018; 8:9840. [PMID: 29959335 PMCID: PMC6026200 DOI: 10.1038/s41598-018-27791-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 05/24/2018] [Indexed: 01/19/2023] Open
Abstract
Intussusceptive angiogenesis (IA) is a complementary method to sprouting angiogenesis (SA). The hallmark of IA is formation of trans-capillary tissue pillars, their fusion and remodeling of the vascular plexus. In this study, we investigate the formation of the zebrafish caudal vein plexus (CVP) in Tg(fli1a:eGFP)y7 and the synergistic interaction of IA and SA in crafting the archetypical angio-architecture of the CVP. Dynamic in vivo observations and quantitative analyses revealed that the primitive CVP during development was initiated through SA. Further vascular growth and remodeling occurred by IA. Intussusception contributed to the expansion of the CVP by formation of new pillars. Those pillars arose in front of the already existing ones; and in a subsequent step the serried pillars elongated and fused together. This resulted in segregation of larger vascular segments and remodelling of the disorganized vascular meshwork into hierarchical tree-like arrangement. Blood flow was the main driving force for IA, particularly shear stress geometry at the site of pillar formation and fusion. Computational simulations based on hemodynamics showed drop in shear stress levels at locations of new pillar formation, pillar elongation and fusion. Correlative 3D serial block face scanning electron microscopy confirmed the morphological substrate of the phenomena of the pillar formation observed in vivo. The data obtained demonstrates that after the sprouting phase and formation of the primitive capillary meshwork, the hemodynamic conditions enhance intussusceptive segregation of hierarchical vascular tree i.e. intussusceptive arborization resulting in complex vascular structures with specific angio-architecture.
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21
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A multi-step transcriptional cascade underlies vascular regeneration in vivo. Sci Rep 2018; 8:5430. [PMID: 29615716 PMCID: PMC5882937 DOI: 10.1038/s41598-018-23653-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 03/13/2018] [Indexed: 01/22/2023] Open
Abstract
The molecular mechanisms underlying vascular regeneration and repair are largely unknown. To gain insight into this process, we developed a method of intima denudation, characterized the progression of endothelial healing, and performed transcriptome analysis over time. Next-generation RNA sequencing (RNAseq) provided a quantitative and unbiased gene expression profile during in vivo regeneration following denudation injury. Our data indicate that shortly after injury, cells immediately adjacent to the wound mount a robust and rapid response with upregulation of genes like Jun, Fos, Myc, as well as cell adhesion genes. This was quickly followed by a wave of proliferative genes. After completion of endothelial healing a vigorous array of extracellular matrix transcripts were upregulated. Gene ontology enrichment and protein network analysis were used to identify transcriptional profiles over time. Further data mining revealed four distinct stages of regeneration: shock, proliferation, acclimation, and maturation. The transcriptional signature of those stages provides insight into the regenerative machinery responsible for arterial repair under normal physiologic conditions.
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22
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Tan R, Michalski A, Saran F, Mankad K, Slater O. Initial response with paradoxical deterioration following bevacizumab for cerebral radiation necrosis. Pediatr Blood Cancer 2017; 64. [PMID: 27805303 DOI: 10.1002/pbc.26313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 09/23/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Ronald Tan
- Department of Paediatric Oncology, Great Ormond Street Hospital, London, United Kingdom
| | - Antony Michalski
- Department of Paediatric Oncology, Great Ormond Street Hospital, London, United Kingdom
| | - Frank Saran
- Department of Neuro-Oncology, Royal Marsden Hospital, London, United Kingdom
| | - Kshitij Mankad
- Department of Neuro-Radiology, Great Ormond Street Hospital, London, United Kingdom
| | - Olga Slater
- Department of Paediatric Oncology, Great Ormond Street Hospital, London, United Kingdom
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23
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Henning RJ. Therapeutic angiogenesis: angiogenic growth factors for ischemic heart disease. Future Cardiol 2016; 12:585-99. [PMID: 27420190 DOI: 10.2217/fca-2016-0006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Stem cells encode vascular endothelial growth factors (VEGFs), fibroblastic growth factors (FGFs), stem cell factor, stromal cell-derived factor, platelet growth factor and angiopoietin that can contribute to myocardial vascularization. VEGFs and FGFs are the most investigated growth factors. VEGFs regulate angiogenesis and vasculogenesis. FGFs stimulate vessel cell proliferation and differentiation and are regulators of endothelial cell migration, proliferation and survival. Clinical trials of VEGF or FGF for myocardial angiogenesis have produced disparate results. The efficacy of therapeutic angiogenesis can be improved by: (1) identifying the most optimal patients; (2) increased knowledge of angiogenic factor pharmacokinetics and proper dose; (3) prolonging contact of angiogenic factors with the myocardium; (4) increasing the efficiency of VEGF or FGF gene transduction; and (5) utilizing PET or MRI to measure myocardial perfusion and perfusion reserve.
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Affiliation(s)
- Robert J Henning
- The University of South Florida and the James A. Haley Hospital, Tampa, FL 33612 USA
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24
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Betz C, Lenard A, Belting HG, Affolter M. Cell behaviors and dynamics during angiogenesis. Development 2016; 143:2249-60. [DOI: 10.1242/dev.135616] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 05/16/2016] [Indexed: 12/13/2022]
Abstract
Vascular networks are formed and maintained through a multitude of angiogenic processes, such as sprouting, anastomosis and pruning. Only recently has it become possible to study the behavior of the endothelial cells that contribute to these networks at a single-cell level in vivo. This Review summarizes what is known about endothelial cell behavior during developmental angiogenesis, focusing on the morphogenetic changes that these cells undergo.
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Affiliation(s)
- Charles Betz
- Biozentrum der Universität Basel, Klingelbergstrasse 50/70, Basel CH-4056, Switzerland
| | - Anna Lenard
- Biozentrum der Universität Basel, Klingelbergstrasse 50/70, Basel CH-4056, Switzerland
| | - Heinz-Georg Belting
- Biozentrum der Universität Basel, Klingelbergstrasse 50/70, Basel CH-4056, Switzerland
| | - Markus Affolter
- Biozentrum der Universität Basel, Klingelbergstrasse 50/70, Basel CH-4056, Switzerland
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25
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Urao N, Okonkwo UA, Fang MM, Zhuang ZW, Koh TJ, DiPietro LA. MicroCT angiography detects vascular formation and regression in skin wound healing. Microvasc Res 2016; 106:57-66. [PMID: 27009591 DOI: 10.1016/j.mvr.2016.03.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/09/2016] [Accepted: 03/17/2016] [Indexed: 12/27/2022]
Abstract
Properly regulated angiogenesis and arteriogenesis are essential for effective wound healing. Tissue injury induces robust new vessel formation and subsequent vessel maturation, which involves vessel regression and remodeling. Although formation of functional vasculature is essential for healing, alterations in vascular structure over the time course of skin wound healing are not well understood. Here, using high-resolution ex vivo X-ray micro-computed tomography (microCT), we describe the vascular network during healing of skin excisional wounds with highly detailed three-dimensional (3D) reconstructed images and associated quantitative analysis. We found that relative vessel volume, surface area and branching number are significantly decreased in wounds from day 7 to days 14 and 21. Segmentation and skeletonization analysis of selected branches from high-resolution images as small as 2.5μm voxel size show that branching orders are decreased in the wound vessels during healing. In histological analysis, we found that the contrast agent fills mainly arterioles, but not small capillaries nor large veins. In summary, high-resolution microCT revealed dynamic alterations of vessel structures during wound healing. This technique may be useful as a key tool in the study of the formation and regression of wound vessels.
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Affiliation(s)
- Norifumi Urao
- University of Illinois at Chicago, Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, USA.
| | - Uzoagu A Okonkwo
- University of Illinois at Chicago College of Dentistry, Center for Wound Healing and Tissue Regeneration, Department of Periodontics, USA
| | - Milie M Fang
- University of Illinois at Chicago, Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, USA
| | - Zhen W Zhuang
- Yale School of Medicine, Yale University, Yale Translational Research Imaging Center, USA
| | - Timothy J Koh
- University of Illinois at Chicago, Center for Wound Healing and Tissue Regeneration, Department of Kinesiology and Nutrition, USA
| | - Luisa A DiPietro
- University of Illinois at Chicago College of Dentistry, Center for Wound Healing and Tissue Regeneration, Department of Periodontics, USA.
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26
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