1
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Bhakuni T, Norden PR, Ujiie N, Tan C, Lee SK, Tedeschi T, Hsieh YW, Wang Y, Liu T, Fawzi AA, Kume T. FOXC1 regulates endothelial CD98 (LAT1/4F2hc) expression in retinal angiogenesis and blood-retina barrier formation. Nat Commun 2024; 15:4097. [PMID: 38755144 PMCID: PMC11099035 DOI: 10.1038/s41467-024-48134-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 04/22/2024] [Indexed: 05/18/2024] Open
Abstract
Angiogenesis, the growth of new blood vessels from pre-existing vasculature, is essential for the development of new organ systems, but transcriptional control of angiogenesis remains incompletely understood. Here we show that FOXC1 is essential for retinal angiogenesis. Endothelial cell (EC)-specific loss of Foxc1 impairs retinal vascular growth and expression of Slc3a2 and Slc7a5, which encode the heterodimeric CD98 (LAT1/4F2hc) amino acid transporter and regulate the intracellular transport of essential amino acids and activation of the mammalian target of rapamycin (mTOR). EC-Foxc1 deficiency diminishes mTOR activity, while administration of the mTOR agonist MHY-1485 rescues perturbed retinal angiogenesis. EC-Foxc1 expression is required for retinal revascularization and resolution of neovascular tufts in a model of oxygen-induced retinopathy. Foxc1 is also indispensable for pericytes, a critical component of the blood-retina barrier during retinal angiogenesis. Our findings establish FOXC1 as a crucial regulator of retinal vessels and identify therapeutic targets for treating retinal vascular disease.
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Affiliation(s)
- Teena Bhakuni
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Pieter R Norden
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Naoto Ujiie
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Can Tan
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Sun Kyong Lee
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Thomas Tedeschi
- Department of Ophthalmology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Yi-Wen Hsieh
- Department of Ophthalmology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Ying Wang
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, USA
| | - Ting Liu
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Amani A Fawzi
- Department of Ophthalmology, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Tsutomu Kume
- Department of Medicine, Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.
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2
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Ahuja S, Adjekukor C, Li Q, Kocha KM, Rosin N, Labit E, Sinha S, Narang A, Long Q, Biernaskie J, Huang P, Childs SJ. The development of brain pericytes requires expression of the transcription factor nkx3.1 in intermediate precursors. PLoS Biol 2024; 22:e3002590. [PMID: 38683849 PMCID: PMC11081496 DOI: 10.1371/journal.pbio.3002590] [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: 06/21/2023] [Revised: 05/09/2024] [Accepted: 03/14/2024] [Indexed: 05/02/2024] Open
Abstract
Brain pericytes are one of the critical cell types that regulate endothelial barrier function and activity, thus ensuring adequate blood flow to the brain. The genetic pathways guiding undifferentiated cells into mature pericytes are not well understood. We show here that pericyte precursor populations from both neural crest and head mesoderm of zebrafish express the transcription factor nkx3.1 develop into brain pericytes. We identify the gene signature of these precursors and show that an nkx3.1-, foxf2a-, and cxcl12b-expressing pericyte precursor population is present around the basilar artery prior to artery formation and pericyte recruitment. The precursors later spread throughout the brain and differentiate to express canonical pericyte markers. Cxcl12b-Cxcr4 signaling is required for pericyte attachment and differentiation. Further, both nkx3.1 and cxcl12b are necessary and sufficient in regulating pericyte number as loss inhibits and gain increases pericyte number. Through genetic experiments, we have defined a precursor population for brain pericytes and identified genes critical for their differentiation.
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Affiliation(s)
- Suchit Ahuja
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Cynthia Adjekukor
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Qing Li
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Katrinka M. Kocha
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Nicole Rosin
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - Elodie Labit
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - Sarthak Sinha
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - Ankita Narang
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Quan Long
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Jeff Biernaskie
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
- Department of Comparative Biology and Experimental Medicine, Faculty of Veterinary Medicine, University of Calgary, Calgary, Canada
| | - Peng Huang
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
| | - Sarah J. Childs
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary, Canada
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary, Canada
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3
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Gastfriend BD, Snyder ME, Holt HE, Daneman R, Palecek SP, Shusta EV. Notch3 directs differentiation of brain mural cells from human pluripotent stem cell-derived neural crest. SCIENCE ADVANCES 2024; 10:eadi1737. [PMID: 38306433 PMCID: PMC10836734 DOI: 10.1126/sciadv.adi1737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 01/04/2024] [Indexed: 02/04/2024]
Abstract
Brain mural cells regulate development and function of the blood-brain barrier and control blood flow. Existing in vitro models of human brain mural cells have low expression of key mural cell genes, including NOTCH3. Thus, we asked whether activation of Notch3 signaling in hPSC-derived neural crest could direct the differentiation of brain mural cells with an improved transcriptional profile. Overexpression of the Notch3 intracellular domain (N3ICD) induced expression of mural cell markers PDGFRβ, TBX2, FOXS1, KCNJ8, SLC6A12, and endogenous Notch3. The resulting N3ICD-derived brain mural cells produced extracellular matrix, self-assembled with endothelial cells, and had functional KATP channels. ChIP-seq revealed that Notch3 serves as a direct input to relatively few genes in the context of this differentiation process. Our work demonstrates that activation of Notch3 signaling is sufficient to direct the differentiation of neural crest to mural cells and establishes a developmentally relevant differentiation protocol.
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Affiliation(s)
- Benjamin D Gastfriend
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Margaret E Snyder
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Hope E Holt
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Richard Daneman
- Departments of Neurosciences and Pharmacology, University of California, San Diego, La Jolla, CA 92093, USA
| | - Sean P Palecek
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Eric V Shusta
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI 53706, USA
- Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI 53706, USA
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4
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De Bastiani MA, Bellaver B, Carello-Collar G, Zimmermann M, Kunach P, Lima-Filho RA, Forner S, Martini AC, Pascoal TA, Lourenco MV, Rosa-Neto P, Zimmer ER. Cross-species comparative hippocampal transcriptomics in Alzheimer's disease. iScience 2024; 27:108671. [PMID: 38292167 PMCID: PMC10824791 DOI: 10.1016/j.isci.2023.108671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 07/11/2023] [Accepted: 12/05/2023] [Indexed: 02/01/2024] Open
Abstract
Alzheimer's disease (AD) is a multifactorial pathology, with most cases having a sporadic origin. Recently, knock-in (KI) mouse models, such as the novel humanized amyloid-β (hAβ)-KI, have been developed to better resemble sporadic human AD. METHODS Here, we compared hippocampal publicly available transcriptomic profiles of transgenic (5xFAD and APP/PS1) and KI (hAβ-KI) mouse models with early- (EOAD) and late- (LOAD) onset AD patients. RESULTS The three mouse models presented more Gene Ontology biological processes terms and enriched signaling pathways in common with LOAD than with EOAD individuals. Experimental validation of consistently dysregulated genes revealed five altered in mice (SLC11A1, S100A6, CD14, CD33, and C1QB) and three in humans (S100A6, SLC11A1, and KCNK). Finally, we identified 17 transcription factors potentially acting as master regulators of AD. CONCLUSION Our cross-species analyses revealed that the three mouse models presented a remarkable similarity to LOAD, with the hAβ-KI being the more specific one.
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Affiliation(s)
- Marco Antônio De Bastiani
- Graduate Program in Biological Sciences: Biochemistry, Department of Biochemistry, Institute of Health Basic Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, State of Rio Grande do Sul 90035-003, Brazil
| | - Bruna Bellaver
- Department of Psychiatry, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Giovanna Carello-Collar
- Graduate Program in Biological Sciences: Biochemistry, Department of Biochemistry, Institute of Health Basic Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, State of Rio Grande do Sul 90035-003, Brazil
| | - Maria Zimmermann
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, Québec H3A 1A1, Canada
- Translational Neuroimaging Laboratory, McGill University, Montréal, Québec H4H 1R3, Canada
| | - Peter Kunach
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, Québec H3A 1A1, Canada
- Translational Neuroimaging Laboratory, McGill University, Montréal, Québec H4H 1R3, Canada
- Douglas Hospital Research Centre, Montreal, Québec H4H 1R3, Canada
| | - Ricardo A.S. Lima-Filho
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, State of Rio de Janeiro 21941-902, Brazil
| | - Stefania Forner
- Institute for Memory Impairments and Neurological Disorders (UCI MIND), University of California, Irvine, Irvine, CA 92697, USA
| | - Alessandra Cadete Martini
- Department of Pathology & Laboratory Medicine, University of California, Irvine, Irvine, CA 92697, USA
| | - Tharick A. Pascoal
- Department of Psychiatry, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
- Department of Neurology, School of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213, USA
| | - Mychael V. Lourenco
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, State of Rio de Janeiro 21941-902, Brazil
| | - Pedro Rosa-Neto
- Department of Neurology and Neurosurgery, Montréal Neurological Institute, McGill University, Montréal, Québec H3A 1A1, Canada
- Translational Neuroimaging Laboratory, McGill University, Montréal, Québec H4H 1R3, Canada
- Douglas Hospital Research Centre, Montreal, Québec H4H 1R3, Canada
| | - Eduardo R. Zimmer
- Graduate Program in Biological Sciences: Biochemistry, Department of Biochemistry, Institute of Health Basic Sciences, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, State of Rio Grande do Sul 90035-003, Brazil
- Department of Pharmacology, ICBS, UFRGS, Porto Alegre, State of Rio Grande do Sul 90035-003, Brazil
- Graduate Program in Biological Sciences: Pharmacology and Therapeutics, Department of Pharmacology, ICBS, UFRGS, Porto Alegre, State of Rio Grande do Sul 90035-003, Brazil
- Brain Institute of Rio Grande Do Sul, Pontifical Catholic University of Rio Grande Do Sul, Porto Alegre, State of Rio Grande do Sul 90610-000, Brazil
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5
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Collignon A, Dion-Albert L, Ménard C, Coelho-Santos V. Sex, hormones and cerebrovascular function: from development to disorder. Fluids Barriers CNS 2024; 21:2. [PMID: 38178239 PMCID: PMC10768274 DOI: 10.1186/s12987-023-00496-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 11/29/2023] [Indexed: 01/06/2024] Open
Abstract
Proper cerebrovascular development and neurogliovascular unit assembly are essential for brain growth and function throughout life, ensuring the continuous supply of nutrients and oxygen. This involves crucial events during pre- and postnatal stages through key pathways, including vascular endothelial growth factor (VEGF) and Wnt signaling. These pathways are pivotal for brain vascular growth, expansion, and blood-brain barrier (BBB) maturation. Interestingly, during fetal and neonatal life, cerebrovascular formation coincides with the early peak activity of the hypothalamic-pituitary-gonadal axis, supporting the idea of sex hormonal influence on cerebrovascular development and barriergenesis.Sex hormonal dysregulation in early development has been implicated in neurodevelopmental disorders with highly sexually dimorphic features, such as autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD). Both disorders show higher prevalence in men, with varying symptoms between sexes, with boys exhibiting more externalizing behaviors, such as aggressivity or hyperactivity, and girls displaying higher internalizing behaviors, including anxiety, depression, or attention disorders. Indeed, ASD and ADHD are linked to high prenatal testosterone exposure and reduced aromatase expression, potentially explaining sex differences in prevalence and symptomatology. In line with this, high estrogen levels seem to attenuate ADHD symptoms. At the cerebrovascular level, sex- and region-specific variations of cerebral blood flow perfusion have been reported in both conditions, indicating an impact of gonadal hormones on the brain vascular system, disrupting its ability to respond to neuronal demands.This review aims to provide an overview of the existing knowledge concerning the impact of sex hormones on cerebrovascular formation and maturation, as well as the onset of neurodevelopmental disorders. Here, we explore the concept of gonadal hormone interactions with brain vascular and BBB development to function, with a particular focus on the modulation of VEGF and Wnt signaling. We outline how these pathways may be involved in the underpinnings of ASD and ADHD. Outstanding questions and potential avenues for future research are highlighted, as uncovering sex-specific physiological and pathological aspects of brain vascular development might lead to innovative therapeutic approaches in the context of ASD, ADHD and beyond.
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Affiliation(s)
- Adeline Collignon
- Department of Psychiatry & Neuroscience and CERVO Brain Research Center, Universite Laval, Quebec City, Canada
| | - Laurence Dion-Albert
- Department of Psychiatry & Neuroscience and CERVO Brain Research Center, Universite Laval, Quebec City, Canada
| | - Caroline Ménard
- Department of Psychiatry & Neuroscience and CERVO Brain Research Center, Universite Laval, Quebec City, Canada
| | - Vanessa Coelho-Santos
- Institute for Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal.
- University of Coimbra, Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Coimbra, Portugal.
- Faculty of Medicine, University of Coimbra, Institute of Physiology, Coimbra, Portugal.
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6
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Sur A, Wang Y, Capar P, Margolin G, Prochaska MK, Farrell JA. Single-cell analysis of shared signatures and transcriptional diversity during zebrafish development. Dev Cell 2023; 58:3028-3047.e12. [PMID: 37995681 PMCID: PMC11181902 DOI: 10.1016/j.devcel.2023.11.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 08/24/2023] [Accepted: 11/01/2023] [Indexed: 11/25/2023]
Abstract
During development, animals generate distinct cell populations with specific identities, functions, and morphologies. We mapped transcriptionally distinct populations across 489,686 cells from 62 stages during wild-type zebrafish embryogenesis and early larval development (3-120 h post-fertilization). Using these data, we identified the limited catalog of gene expression programs reused across multiple tissues and their cell-type-specific adaptations. We also determined the duration each transcriptional state is present during development and identify unexpected long-term cycling populations. Focused clustering and transcriptional trajectory analyses of non-skeletal muscle and endoderm identified transcriptional profiles and candidate transcriptional regulators of understudied cell types and subpopulations, including the pneumatic duct, individual intestinal smooth muscle layers, spatially distinct pericyte subpopulations, and recently discovered best4+ cells. To enable additional discoveries, we make this comprehensive transcriptional atlas of early zebrafish development available through our website, Daniocell.
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Affiliation(s)
- Abhinav Sur
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20814, USA
| | - Yiqun Wang
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
| | - Paulina Capar
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20814, USA
| | - Gennady Margolin
- Bioinformatics and Scientific Programming Core, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20814, USA
| | - Morgan Kathleen Prochaska
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20814, USA
| | - Jeffrey A Farrell
- Division of Developmental Biology, Eunice Kennedy Shriver National Institute of Child Health and Human Development, NIH, Bethesda, MD 20814, USA.
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7
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O'Brown NM, Patel NB, Hartmann U, Klein AM, Gu C, Megason SG. The secreted neuronal signal Spock1 promotes blood-brain barrier development. Dev Cell 2023; 58:1534-1547.e6. [PMID: 37437574 PMCID: PMC10525910 DOI: 10.1016/j.devcel.2023.06.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 03/07/2023] [Accepted: 06/16/2023] [Indexed: 07/14/2023]
Abstract
The blood-brain barrier (BBB) is a unique set of properties of the brain vasculature which severely restrict its permeability to proteins and small molecules. Classic chick-quail chimera studies have shown that these properties are not intrinsic to the brain vasculature but rather are induced by surrounding neural tissue. Here, we identify Spock1 as a candidate neuronal signal for regulating BBB permeability in zebrafish and mice. Mosaic genetic analysis shows that neuronally expressed Spock1 is cell non-autonomously required for a functional BBB. Leakage in spock1 mutants is associated with altered extracellular matrix (ECM), increased endothelial transcytosis, and altered pericyte-endothelial interactions. Furthermore, a single dose of recombinant SPOCK1 partially restores BBB function in spock1 mutants by quenching gelatinase activity and restoring vascular expression of BBB genes including mcamb. These analyses support a model in which neuronally secreted Spock1 initiates BBB properties by altering the ECM, thereby regulating pericyte-endothelial interactions and downstream vascular gene expression.
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Affiliation(s)
- Natasha M O'Brown
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA.
| | - Nikit B Patel
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
| | - Ursula Hartmann
- Center for Biochemistry, Medical Faculty, University of Cologne, Joseph-Stelzmann-Str. 52, 50931 Cologne, Germany
| | - Allon M Klein
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA
| | - Chenghua Gu
- Howard Hughes Medical Institute, Department of Neurobiology, Harvard Medical School, 220 Longwood Ave, Boston, MA 02115, USA
| | - Sean G Megason
- Department of Systems Biology, Harvard Medical School, 200 Longwood Ave, Boston, MA 02115, USA.
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8
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Wiseman JA, Dragunow M, I-H Park T. Cell Type-Specific Nuclei Markers: The Need for Human Brain Research to Go Nuclear. Neuroscientist 2023; 29:41-61. [PMID: 34459315 DOI: 10.1177/10738584211037351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Identifying and interrogating cell type-specific populations within the heterogeneous milieu of the human brain is paramount to resolving the processes of normal brain homeostasis and the pathogenesis of neurological disorders. While brain cell type-specific markers are well established, most are localized on cellular membranes or within the cytoplasm, with limited literature describing those found in the nucleus. Due to the complex cytoarchitecture of the human brain, immunohistochemical studies require well-defined cell-specific nuclear markers for more precise and efficient quantification of the cellular populations. Furthermore, efficient nuclear markers are required for cell type-specific purification and transcriptomic interrogation of archived human brain tissue through nuclei isolation-based RNA sequencing. To sate the growing demand for robust cell type-specific nuclear markers, we thought it prudent to comprehensively review the current literature to identify and consolidate a novel series of robust cell type-specific nuclear markers that can assist researchers across a range of neuroscientific disciplines. The following review article collates and discusses several key and prospective cell type-specific nuclei markers for each of the major human brain cell types; it then concludes by discussing the potential applications of cell type-specific nuclear workflows and the power of nuclear-based neuroscientific research.
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Affiliation(s)
- James A Wiseman
- Department of Pharmacology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Mike Dragunow
- Department of Pharmacology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Neurosurgical Research Unit, The Centre for Brain Research, University of Auckland, Auckland, New Zealand.,Hugh Green Biobank, The Centre for Brain Research, University of Auckland, Auckland, New Zealand
| | - Thomas I-H Park
- Department of Pharmacology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand.,Department of Anatomy and Medical Imaging, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
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9
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Li J, Abedi V, Zand R. Dissecting Polygenic Etiology of Ischemic Stroke in the Era of Precision Medicine. J Clin Med 2022; 11:jcm11205980. [PMID: 36294301 PMCID: PMC9604604 DOI: 10.3390/jcm11205980] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 10/05/2022] [Accepted: 10/07/2022] [Indexed: 12/03/2022] Open
Abstract
Ischemic stroke (IS), the leading cause of death and disability worldwide, is caused by many modifiable and non-modifiable risk factors. This complex disease is also known for its multiple etiologies with moderate heritability. Polygenic risk scores (PRSs), which have been used to establish a common genetic basis for IS, may contribute to IS risk stratification for disease/outcome prediction and personalized management. Statistical modeling and machine learning algorithms have contributed significantly to this field. For instance, multiple algorithms have been successfully applied to PRS construction and integration of genetic and non-genetic features for outcome prediction to aid in risk stratification for personalized management and prevention measures. PRS derived from variants with effect size estimated based on the summary statistics of a specific subtype shows a stronger association with the matched subtype. The disruption of the extracellular matrix and amyloidosis account for the pathogenesis of cerebral small vessel disease (CSVD). Pathway-specific PRS analyses confirm known and identify novel etiologies related to IS. Some of these specific PRSs (e.g., derived from endothelial cell apoptosis pathway) individually contribute to post-IS mortality and, together with clinical risk factors, better predict post-IS mortality. In this review, we summarize the genetic basis of IS, emphasizing the application of methodologies and algorithms used to construct PRSs and integrate genetics into risk models.
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Affiliation(s)
- Jiang Li
- Department of Molecular and Functional Genomics, Weis Center for Research, Geisinger Health System, Danville, PA 17822, USA
| | - Vida Abedi
- Department of Public Health Sciences, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA
- Correspondence: (V.A.); (R.Z.)
| | - Ramin Zand
- Department of Neurology, College of Medicine, The Pennsylvania State University, Hershey, PA 17033, USA
- Neuroscience Institute, Geisinger Health System, 100 North Academy Avenue, Danville, PA 17822, USA
- Correspondence: (V.A.); (R.Z.)
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10
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Biswas S, Shahriar S, Giangreco NP, Arvanitis P, Winkler M, Tatonetti NP, Brunken WJ, Cutforth T, Agalliu D. Mural Wnt/β-catenin signaling regulates Lama2 expression to promote neurovascular unit maturation. Development 2022; 149:dev200610. [PMID: 36098369 PMCID: PMC9578690 DOI: 10.1242/dev.200610] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 08/04/2022] [Indexed: 11/20/2022]
Abstract
Neurovascular unit and barrier maturation rely on vascular basement membrane (vBM) composition. Laminins, a major vBM component, are crucial for these processes, yet the signaling pathway(s) that regulate their expression remain unknown. Here, we show that mural cells have active Wnt/β-catenin signaling during central nervous system development in mice. Bulk RNA sequencing and validation using postnatal day 10 and 14 wild-type versus adenomatosis polyposis coli downregulated 1 (Apcdd1-/-) mouse retinas revealed that Lama2 mRNA and protein levels are increased in mutant vasculature with higher Wnt/β-catenin signaling. Mural cells are the main source of Lama2, and Wnt/β-catenin activation induces Lama2 expression in mural cells in vitro. Markers of mature astrocytes, including aquaporin 4 (a water channel in astrocyte endfeet) and integrin-α6 (a laminin receptor), are upregulated in Apcdd1-/- retinas with higher Lama2 vBM deposition. Thus, the Wnt/β-catenin pathway regulates Lama2 expression in mural cells to promote neurovascular unit and barrier maturation.
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Affiliation(s)
- Saptarshi Biswas
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Sanjid Shahriar
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Pathology & Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Nicholas P. Giangreco
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Panos Arvanitis
- Department of Biomedical Engineering, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Markus Winkler
- Faculty of Medicine, Institute of Anatomy, Ludwig-Maximilians Universität, Munich 80336, Germany
| | - Nicholas P. Tatonetti
- Department of Systems Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - William J. Brunken
- Department of Ophthalmology & Visual Sciences, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | - Tyler Cutforth
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
| | - Dritan Agalliu
- Department of Neurology, Columbia University Irving Medical Center, New York, NY 10032, USA
- Department of Pathology & Cell Biology, Columbia University Irving Medical Center, New York, NY 10032, USA
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11
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Ryu JR, Ahuja S, Arnold CR, Potts KG, Mishra A, Yang Q, Sargurupremraj M, Mahoney DJ, Seshadri S, Debette S, Childs SJ. Stroke-associated intergenic variants modulate a human FOXF2 transcriptional enhancer. Proc Natl Acad Sci U S A 2022; 119:e2121333119. [PMID: 35994645 PMCID: PMC9436329 DOI: 10.1073/pnas.2121333119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 07/28/2022] [Indexed: 11/18/2022] Open
Abstract
SNPs associated with human stroke risk have been identified in the intergenic region between Forkhead family transcription factors FOXF2 and FOXQ1, but we lack a mechanism for the association. FoxF2 is expressed in vascular mural pericytes and is important for maintaining pericyte number and stabilizing small vessels in zebrafish. The stroke-associated SNPs are located in a previously unknown transcriptional enhancer for FOXF2, functional in human cells and zebrafish. We identify critical enhancer regions for FOXF2 gene expression, including binding sites occupied by transcription factors ETS1, RBPJ, and CTCF. rs74564934, a stroke-associated SNP adjacent to the ETS1 binding site, decreases enhancer function, as does mutation of RPBJ sites. rs74564934 is significantly associated with the increased risk of any stroke, ischemic stroke, small vessel stroke, and elevated white matter hyperintensity burden in humans. Foxf2 has a conserved function cross-species and is expressed in vascular mural pericytes of the vessel wall. Thus, stroke-associated SNPs modulate enhancer activity and expression of a regulator of vascular stabilization, FOXF2, thereby modulating stroke risk.
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Affiliation(s)
- Jae-Ryeon Ryu
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary AB T2N 4N1, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary AB T2N 4N1, Canada
| | - Suchit Ahuja
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary AB T2N 4N1, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary AB T2N 4N1, Canada
| | - Corey R. Arnold
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary AB T2N 4N1, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary AB T2N 4N1, Canada
| | - Kyle G. Potts
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary AB T2N 4N1, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary AB T2N 4N1, Canada
- Arnie Charbonneau Cancer Institute, University of Calgary, Calgary AB T2N 4N1, Canada
| | - Aniket Mishra
- University of Bordeaux, INSERM, Bordeaux Population Health Research Center, Team VINTAGE, UMR 1219, 33000 Bordeaux, France
| | - Qiong Yang
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118
- Department of Biostatistics, Boston University School of Public Health, Boston, MA 02118
| | - Muralidharan Sargurupremraj
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118
- Glenn Biggs Institute for Alzheimer’s & Neurodegenerative Diseases, University of Texas Health Science Center, San Antonio, TX 78229
- Boston University and the NHLBI’s Framingham Heart Study, Boston, MA 02215
| | - Douglas J. Mahoney
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary AB T2N 4N1, Canada
- Department of Microbiology, Immunology, and Infectious Diseases, University of Calgary, Calgary AB T2N 4N1, Canada
- Arnie Charbonneau Cancer Institute, University of Calgary, Calgary AB T2N 4N1, Canada
| | - Sudha Seshadri
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118
- Glenn Biggs Institute for Alzheimer’s & Neurodegenerative Diseases, University of Texas Health Science Center, San Antonio, TX 78229
- Boston University and the NHLBI’s Framingham Heart Study, Boston, MA 02215
| | - Stéphanie Debette
- University of Bordeaux, INSERM, Bordeaux Population Health Research Center, Team VINTAGE, UMR 1219, 33000 Bordeaux, France
- Department of Neurology, Boston University School of Medicine, Boston, MA 02118
- Department of Neurology, CHU de Bordeaux, 33000 Bordeaux, France
| | - Sarah J. Childs
- Alberta Children’s Hospital Research Institute, University of Calgary, Calgary AB T2N 4N1, Canada
- Department of Biochemistry and Molecular Biology, University of Calgary, Calgary AB T2N 4N1, Canada
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12
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Duan X, Shi Y, Zhao S, Yao L, Sheng J, Liu D. Foxc1a regulates zebrafish vascular integrity and brain vascular development through targeting amotl2a and ctnnb1. Microvasc Res 2022; 143:104400. [PMID: 35724741 DOI: 10.1016/j.mvr.2022.104400] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 11/20/2022]
Abstract
Accumulating evidences have pointed that foxc1a is essential for vascular development and integrity maintenance through regulating the expression of downstream genes and interacting with signaling pathways. However, the underling cellular and molecular mechanisms of foxc1a in regulating vascular development remain undetermined. Based on two different foxc1a mutant zebrafish lines (foxc1anju18 and foxc1anju19 which generated predicted truncated foxc1a proteins with 50aa and 315aa respectively), we found that around 30 % of foxc1anju18 zebrafish exhibited severe vascular developmental defects with obvious hemorrhage in hindbrain and trunk at embryonic stages. Confocal imaging analysis revealed that the formation of middle cerebral vein (MCeV), intra-cerebral central arteries (CtAs) and dorsal longitudinal vein (DLV) of brain vessels was significantly blocked in foxc1anju18enbryos. Injection of exogenous full length and foxc1anju19 truncated foxc1a mRNA both rescued the deficiency of foxc1anju18 embryos. Transcriptome analysis revealed 186 DEGs in foxc1anju18 zebrafish among which amotl2a and ctnnb1 expression were reduced and functionally associated with adherens junctions. Dual-Luciferase assays validated amotl2a and ctnnb1 were both directly transactivated by foxc1a. Rescue experiments demonstrated that amotl2a was mainly responsible for the vascular integrity caused by foxc1a mutation and also coordinated with ctnnb1 to regulate brain vascular development. Our data point to a novel clue that foxc1a regulates vascular integrity and brain vascular development through targeting amotl2a and ctnnb1.
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Affiliation(s)
- Xuchu Duan
- School of Life Science, Nantong Laboratory of Development and Diseases, Department of Endocrine, Affiliated Hospital, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Medical School, Nantong University, Nantong, China
| | - Yuanyuan Shi
- The Sixth Affiliated Hospital of Nantong University, Yancheng Third People's Hospital, Yancheng, China
| | - Shu Zhao
- School of Life Science, Nantong Laboratory of Development and Diseases, Department of Endocrine, Affiliated Hospital, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Medical School, Nantong University, Nantong, China
| | - Lili Yao
- School of Life Science, Nantong Laboratory of Development and Diseases, Department of Endocrine, Affiliated Hospital, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Medical School, Nantong University, Nantong, China
| | - Jiajing Sheng
- School of Life Science, Nantong Laboratory of Development and Diseases, Department of Endocrine, Affiliated Hospital, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Medical School, Nantong University, Nantong, China.
| | - Dong Liu
- School of Life Science, Nantong Laboratory of Development and Diseases, Department of Endocrine, Affiliated Hospital, Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-innovation Center of Neuroregeneration, Medical School, Nantong University, Nantong, China.
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13
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Vore AS, Barney TM, Deak MM, Varlinskaya EI, Deak T. Adolescent intermittent ethanol exposure produces Sex-Specific changes in BBB Permeability: A potential role for VEGFA. Brain Behav Immun 2022; 102:209-223. [PMID: 35245677 PMCID: PMC9277567 DOI: 10.1016/j.bbi.2022.02.030] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 01/31/2022] [Accepted: 02/27/2022] [Indexed: 12/20/2022] Open
Abstract
Binge drinking that typically begins during adolescence can have long-lasting neurobehavioral consequences, including alterations in the central and peripheral immune systems. Central and peripheral inflammation disrupts blood-brain barrier (BBB) integrity and exacerbates pathology in diseases commonly associated with disturbed BBB function. Thus, the goal of the present studies was to determine long-lasting effects of adolescent intermittent ethanol (AIE) on BBB integrity. For AIE, male and female Sprague Dawley rats were repeatedly exposed to ethanol (4 g/kg, intragastrically) or water during adolescence between postnatal day (P) 30 and P50. In adulthood (∼P75), rats were challenged with fluorescein isothiocyanate (FITC)-tagged Dextran of varying molecular weights (4, 20, & 70 kDa) for assessment of BBB permeability using gross tissue fluorometry (Experiment 1). Experiment 2 extended these effects using immunofluorescence, adding an adult ethanol-exposed group to test for a specific developmental vulnerability. Finally, as a first test of hypothesized mechanism, Experiment 3 examined the effect of AIE on Vascular Endothelial Growth Factor A (VEGFA) and its co-localization with pericytes (identified through expression of platelet derived growth factor receptor beta (PDGFRβ), a key regulatory cell embedded within the BBB. Male, but not female, rats with a history of AIE showed significantly increased dextran permeability in the nucleus accumbens (NAc), cingulate prefrontal cortex (cPFC), and amygdala (AMG). Similar increases in dextran were observed in the hippocampus (HPC) and ventral tegmental area (VTA) of male rats with a history of AIE or equivalent ethanol exposure during adulthood. No changes in BBB permeability were evident in females. When VEGFa expression was examined, male rats exposed to AIE were challenged with 3.5 g/kg ethanol (i.p.) or vehicle acutely in adulthood to assess long-lasting versus acute actions of ethanol. Adult rats with a history of AIE showed significantly fewer total cells expressing VEGFa in the AMG and dHPC following the acute ethanol challenge in adulthood. They also showed a significant reduction in the number of PDGFRβ positive cells that also expressed VEGFa signal. The anatomical distribution of these effects corresponded with increased BBB permeability after AIE (i.e., differential effects in the PVN, AMG, and dHPC). These studies demonstrated sex-specific effects of AIE, with males, but not females, demonstrating long-term increases in BBB permeability that correlated with changes in VEGFa and PDGFRβ protein, two factors known to influence BBB permeability.
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Affiliation(s)
| | | | | | | | - Terrence Deak
- Developmental Exposure Alcohol Research Center, Behavioral Neuroscience Program, Department of Psychology, Binghamton, NY 13902-6000.
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14
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Abstract
Cerebral small vessel disease (cSVD) is a leading cause of ischaemic and haemorrhagic stroke and a major contributor to dementia. Covert cSVD, which is detectable with brain MRI but does not manifest as clinical stroke, is highly prevalent in the general population, particularly with increasing age. Advances in technologies and collaborative work have led to substantial progress in the identification of common genetic variants that are associated with cSVD-related stroke (ischaemic and haemorrhagic) and MRI-defined covert cSVD. In this Review, we provide an overview of collaborative studies - mostly genome-wide association studies (GWAS) - that have identified >50 independent genetic loci associated with the risk of cSVD. We describe how these associations have provided novel insights into the biological mechanisms involved in cSVD, revealed patterns of shared genetic variation across cSVD traits, and shed new light on the continuum between rare, monogenic and common, multifactorial cSVD. We consider how GWAS summary statistics have been leveraged for Mendelian randomization studies to explore causal pathways in cSVD and provide genetic evidence for drug effects, and how the combination of findings from GWAS with gene expression resources and drug target databases has enabled identification of putative causal genes and provided proof-of-concept for drug repositioning potential. We also discuss opportunities for polygenic risk prediction, multi-ancestry approaches and integration with other omics data.
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15
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Shih YH, Portman D, Idrizi F, Grosse A, Lawson ND. Integrated molecular analysis identifies a conserved pericyte gene signature in zebrafish. Development 2021; 148:273393. [PMID: 34751773 DOI: 10.1242/dev.200189] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 10/25/2021] [Indexed: 12/15/2022]
Abstract
Pericytes reside in capillary beds where they share a basement membrane with endothelial cells and regulate their function. However, little is known about embryonic pericyte development, in part, due to lack of specific molecular markers and genetic tools. Here, we applied single cell RNA-sequencing (scRNA-seq) of platelet derived growth factor beta (pdgfrb)-positive cells to molecularly characterize pericytes in zebrafish larvae. scRNA-seq revealed zebrafish cells expressing mouse pericyte gene orthologs, and comparison with bulk RNA-seq from wild-type and pdgfrb mutant larvae further refined a pericyte gene set. Subsequent integration with mouse pericyte scRNA-seq profiles revealed a core set of conserved pericyte genes. Using transgenic reporter lines, we validated pericyte expression of two genes identified in our analysis: NDUFA4 mitochondrial complex associated like 2a (ndufa4l2a), and potassium voltage-gated channel, Isk-related family, member 4 (kcne4). Both reporter lines exhibited pericyte expression in multiple anatomical locations, and kcne4 was also detected in a subset of vascular smooth muscle cells. Thus, our integrated molecular analysis revealed a molecular profile for zebrafish pericytes and allowed us to develop new tools to observe these cells in vivo.
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Affiliation(s)
- Yu-Huan Shih
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Daneal Portman
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Feston Idrizi
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Ann Grosse
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Nathan D Lawson
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
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16
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Gastfriend BD, Foreman KL, Katt ME, Palecek SP, Shusta EV. Integrative analysis of the human brain mural cell transcriptome. J Cereb Blood Flow Metab 2021; 41:3052-3068. [PMID: 34027687 PMCID: PMC8756477 DOI: 10.1177/0271678x211013700] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Brain mural cells, including pericytes and vascular smooth muscle cells, are important for vascular development, blood-brain barrier function, and neurovascular coupling, but the molecular characteristics of human brain mural cells are incompletely characterized. Single cell RNA-sequencing (scRNA-seq) is increasingly being applied to assess cellular diversity in the human brain, but the scarcity of mural cells in whole brain samples has limited their molecular profiling. Here, we leverage the combined power of multiple independent human brain scRNA-seq datasets to build a transcriptomic database of human brain mural cells. We use this combined dataset to determine human-mouse species differences in mural cell transcriptomes, culture-induced dedifferentiation of human brain pericytes, and human mural cell organotypicity, with several key findings validated by RNA fluorescence in situ hybridization. Together, this work improves knowledge regarding the molecular constituents of human brain mural cells, serves as a resource for hypothesis generation in understanding brain mural cell function, and will facilitate comparative evaluation of animal and in vitro models.
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Affiliation(s)
- Benjamin D Gastfriend
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Koji L Foreman
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Moriah E Katt
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Sean P Palecek
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, USA
| | - Eric V Shusta
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, USA.,Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, USA
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17
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Ando K, Ishii T, Fukuhara S. Zebrafish Vascular Mural Cell Biology: Recent Advances, Development, and Functions. Life (Basel) 2021; 11:1041. [PMID: 34685412 PMCID: PMC8537713 DOI: 10.3390/life11101041] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 09/29/2021] [Accepted: 09/29/2021] [Indexed: 12/14/2022] Open
Abstract
Recruitment of mural cells to the vascular wall is essential for forming the vasculature as well as maintaining proper vascular functions. In recent years, zebrafish genetic tools for mural cell biology have improved substantially. Fluorescently labeled zebrafish mural cell reporter lines enable us to study, with higher spatiotemporal resolution than ever, the processes of mural cell development from their progenitors. Furthermore, recent phenotypic analysis of platelet-derived growth factor beta mutant zebrafish revealed well-conserved organotypic mural cell development and functions in vertebrates with the unique features of zebrafish. However, comprehensive reviews of zebrafish mural cells are lacking. Therefore, herein, we highlight recent advances in zebrafish mural cell tools. We also summarize the fundamental features of zebrafish mural cell development, especially at early stages, and functions.
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Affiliation(s)
- Koji Ando
- Department of Molecular Pathophysiology, Institute of Advanced Medical Sciences, Nippon Medical School, Tokyo 113 8602, Japan; (T.I.); (S.F.)
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18
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Fowler G, French DV, Rose A, Squires P, Aniceto da Silva C, Ohata S, Okamoto H, French CR. Protein fucosylation is required for Notch dependent vascular integrity in zebrafish. Dev Biol 2021; 480:62-68. [PMID: 34400136 DOI: 10.1016/j.ydbio.2021.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 08/10/2021] [Accepted: 08/11/2021] [Indexed: 12/19/2022]
Abstract
The onset of circulation in a developing embryo requires intact blood vessels to prevent hemorrhage. The development of endothelial cells, and their subsequent recruitment of perivascular mural cells are important processes to establish and maintain vascular integrity. These processes are genetically controlled during development, and mutations that affect endothelial cell specification, pattern formation, or maturation through the addition of mural cells can result in early developmental hemorrhage. We created a strong loss of function allele of the zebrafish GDP-mannose 4,6 dehydratase (gmds) gene that is required for the de novo synthesis of GDP-fucose, and homozygous embryos display cerebral hemorrhages. Our data demonstrate that gmds mutants have early defects in vascular patterning with ectopic branches observed at time of hemorrhage. Subsequently, defects in the number of mural cells that line the vasculature are observed. Moreover, activation of Notch signaling rescued hemorrhage phenotypes in gmds mutants, highlighting a potential downstream pathway that requires protein fucosylation for vascular integrity. Finally, supplementation with fucose can rescue hemorrhage frequency in gmds mutants, demonstrating that synthesis of GDP-fucose via an alternative (salvage) pathway may provide an avenue toward therapeutic correction of phenotypes observed due to defects in de novo GDP-fucose synthesis. Together, these data are consistent with a novel role for the de novo and salvage protein fucosylation pathways in regulating vascular integrity through a Notch dependent mechanism.
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Affiliation(s)
- Gerissa Fowler
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Danielle V French
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - April Rose
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Paige Squires
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Catarina Aniceto da Silva
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada
| | - Shinya Ohata
- Molecular Cell Biology Laboratory, Research Institute of Pharmaceutical Sciences, Faculty of Pharmacy, Musashino University, Tokyo, Japan
| | - Hitoshi Okamoto
- Laboratory for Neural Circuit Dynamics of Decision-making, RIKEN Center for Brain Science, Saitama, Japan
| | - Curtis R French
- Division of Biomedical Sciences, Faculty of Medicine, Memorial University of Newfoundland, St. John's, NL, Canada.
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19
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Girolamo F, de Trizio I, Errede M, Longo G, d'Amati A, Virgintino D. Neural crest cell-derived pericytes act as pro-angiogenic cells in human neocortex development and gliomas. Fluids Barriers CNS 2021; 18:14. [PMID: 33743764 PMCID: PMC7980348 DOI: 10.1186/s12987-021-00242-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 02/13/2021] [Indexed: 02/07/2023] Open
Abstract
Central nervous system diseases involving the parenchymal microvessels are frequently associated with a ‘microvasculopathy’, which includes different levels of neurovascular unit (NVU) dysfunction, including blood–brain barrier alterations. To contribute to the understanding of NVU responses to pathological noxae, we have focused on one of its cellular components, the microvascular pericytes, highlighting unique features of brain pericytes with the aid of the analyses carried out during vascularization of human developing neocortex and in human gliomas. Thanks to their position, centred within the endothelial/glial partition of the vessel basal lamina and therefore inserted between endothelial cells and the perivascular and vessel-associated components (astrocytes, oligodendrocyte precursor cells (OPCs)/NG2-glia, microglia, macrophages, nerve terminals), pericytes fulfil a central role within the microvessel NVU. Indeed, at this critical site, pericytes have a number of direct and extracellular matrix molecule- and soluble factor-mediated functions, displaying marked phenotypical and functional heterogeneity and carrying out multitasking services. This pericytes heterogeneity is primarily linked to their position in specific tissue and organ microenvironments and, most importantly, to their ontogeny. During ontogenesis, pericyte subtypes belong to two main embryonic germ layers, mesoderm and (neuro)ectoderm, and are therefore expected to be found in organs ontogenetically different, nonetheless, pericytes of different origin may converge and colonize neighbouring areas of the same organ/apparatus. Here, we provide a brief overview of the unusual roles played by forebrain pericytes in the processes of angiogenesis and barriergenesis by virtue of their origin from midbrain neural crest stem cells. A better knowledge of the ontogenetic subpopulations may support the understanding of specific interactions and mechanisms involved in pericyte function/dysfunction, including normal and pathological angiogenesis, thereby offering an alternative perspective on cell subtype-specific therapeutic approaches. ![]()
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Affiliation(s)
- Francesco Girolamo
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, Human Anatomy and Histology Unit, University of Bari School of Medicine, Bari, Italy.
| | - Ignazio de Trizio
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, Human Anatomy and Histology Unit, University of Bari School of Medicine, Bari, Italy.,Intensive Care Unit, Department of Intensive Care, Regional Hospital of Lugano, Ente Ospedaliero Cantonale, Lugano, Switzerland
| | - Mariella Errede
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, Human Anatomy and Histology Unit, University of Bari School of Medicine, Bari, Italy
| | - Giovanna Longo
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, Molecular Biology Unit, University of Bari School of Medicine, Bari, Italy
| | - Antonio d'Amati
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, Human Anatomy and Histology Unit, University of Bari School of Medicine, Bari, Italy.,Department of Emergency and Organ Transplantation, Pathology Section, University of Bari School of Medicine, Bari, Italy
| | - Daniela Virgintino
- Department of Basic Medical Sciences, Neuroscience and Sensory Organs, Human Anatomy and Histology Unit, University of Bari School of Medicine, Bari, Italy
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20
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Girolamo F, de Trizio I, Errede M, Longo G, d’Amati A, Virgintino D. Neural crest cell-derived pericytes act as pro-angiogenic cells in human neocortex development and gliomas. Fluids Barriers CNS 2021. [DOI: 10.1186/s12987-021-00242-7 union select null--] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
AbstractCentral nervous system diseases involving the parenchymal microvessels are frequently associated with a ‘microvasculopathy’, which includes different levels of neurovascular unit (NVU) dysfunction, including blood–brain barrier alterations. To contribute to the understanding of NVU responses to pathological noxae, we have focused on one of its cellular components, the microvascular pericytes, highlighting unique features of brain pericytes with the aid of the analyses carried out during vascularization of human developing neocortex and in human gliomas. Thanks to their position, centred within the endothelial/glial partition of the vessel basal lamina and therefore inserted between endothelial cells and the perivascular and vessel-associated components (astrocytes, oligodendrocyte precursor cells (OPCs)/NG2-glia, microglia, macrophages, nerve terminals), pericytes fulfil a central role within the microvessel NVU. Indeed, at this critical site, pericytes have a number of direct and extracellular matrix molecule- and soluble factor-mediated functions, displaying marked phenotypical and functional heterogeneity and carrying out multitasking services. This pericytes heterogeneity is primarily linked to their position in specific tissue and organ microenvironments and, most importantly, to their ontogeny. During ontogenesis, pericyte subtypes belong to two main embryonic germ layers, mesoderm and (neuro)ectoderm, and are therefore expected to be found in organs ontogenetically different, nonetheless, pericytes of different origin may converge and colonize neighbouring areas of the same organ/apparatus. Here, we provide a brief overview of the unusual roles played by forebrain pericytes in the processes of angiogenesis and barriergenesis by virtue of their origin from midbrain neural crest stem cells. A better knowledge of the ontogenetic subpopulations may support the understanding of specific interactions and mechanisms involved in pericyte function/dysfunction, including normal and pathological angiogenesis, thereby offering an alternative perspective on cell subtype-specific therapeutic approaches.
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21
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Abstract
The complex development of the brain vascular system can be broken down by embryonic stages and anatomic locations, which are tightly regulated by different factors and pathways in time and spatially. The adult brain is relatively quiescent in angiogenesis. However, under disease conditions, such as trauma, stroke, or tumor, angiogenesis can be activated in the adult brain. Disruption of any of the factors or pathways may lead to malformed vessel development. In this chapter, we will discuss factors and pathways involved in normal brain vasculogenesis and vascular maturation, and the pathogenesis of several brain vascular malformations.
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Affiliation(s)
- Yao Yao
- Department of Pharmaceutical and Biomedical Sciences, University of Georgia, Athens, GA, United States
| | - Sonali S Shaligram
- Department of Anesthesia and Perioperative Care, Center for Cerebrovascular Research, University of California San Francisco, San Francisco, CA, United States
| | - Hua Su
- Department of Anesthesia and Perioperative Care, Center for Cerebrovascular Research, University of California San Francisco, San Francisco, CA, United States.
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22
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Sun MR, Chung HM, Matsuk V, Fink DM, Stebbins MJ, Palecek SP, Shusta EV, Lipinski RJ. Sonic Hedgehog Signaling in Cranial Neural Crest Cells Regulates Microvascular Morphogenesis in Facial Development. Front Cell Dev Biol 2020; 8:590539. [PMID: 33117819 PMCID: PMC7575766 DOI: 10.3389/fcell.2020.590539] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2020] [Accepted: 09/14/2020] [Indexed: 12/13/2022] Open
Abstract
Sonic hedgehog (Shh) pathway disruption causes craniofacial malformations including orofacial clefts (OFCs) of the lip and palate. In normal craniofacial morphogenesis, Shh signals to multipotent cranial neural crest cells (cNCCs) and was recently discovered to regulate the angiogenic transcriptome, including expression markers of perivascular cells and pericytes. The mural cells of microvasculature, pericytes in the brain and face differentiate from cNCCs, but their role in facial development is not known. Here, we examined microvascular morphogenesis in a mouse model of Shh pathway antagonist-induced cleft lip and the impact of cNCC-specific Shh pathway activation in a cNCC-endothelial cell co-culture system. During cleft pathogenesis in vivo, disrupted microvascular morphogenesis localized with attenuated tissue outgrowth in the medial nasal processes that form the upper lip. In vitro, we found that human umbilical vein endothelial cell (HUVEC) cord formation was not affected by direct Shh pathway perturbation. However, in a co-culture system in which cNCCs directly interact with endothelial cells, cNCC-autonomous Shh pathway activity significantly prolonged endothelial cord network stability. Taken together, these findings support the premise that Shh pathway activation in cNCCs promotes pericyte-like function and microvascular stability. In addition to suggesting a previously unrecognized role for Shh signaling in facial development, these studies also identify perivascular differentiation and microvascular morphogenesis as new focuses for understanding normal and abnormal craniofacial development.
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Affiliation(s)
- Miranda R Sun
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - Hannah M Chung
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI, United States
| | - Veronika Matsuk
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI, United States
| | - Dustin M Fink
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States
| | - Matthew J Stebbins
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, United States
| | - Sean P Palecek
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, United States
| | - Eric V Shusta
- Department of Chemical and Biological Engineering, University of Wisconsin-Madison, Madison, WI, United States.,Department of Neurological Surgery, University of Wisconsin-Madison, Madison, WI, United States
| | - Robert J Lipinski
- Department of Comparative Biosciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, WI, United States.,Molecular and Environmental Toxicology Center, University of Wisconsin-Madison, Madison, WI, United States
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23
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Fan SP, Lee NC, Lin CH. Novel Phenotype of 6p25 Deletion Syndrome Presenting Juvenile Parkinsonism and Brain Calcification. Mov Disord 2020; 35:1457-1462. [PMID: 32369633 DOI: 10.1002/mds.28079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 03/31/2020] [Accepted: 04/07/2020] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Chromosome 6p25 deletion syndrome is a rare neurocristopathy with variable clinical features. The objective of the current study was to describe a novel phenotype for autosomal-dominant chromosome 6p25 deletion syndrome. The presentation included bilateral basal ganglia and subcortical calcifications and juvenile parkinsonism, resembling primary familial brain calcification. METHODS Phenotypic characterization, exome sequencing, and oligonucleotide array were carried out in the index family. RESULTS The index patient and her mother had a history of developmental delay, mild facial dysmorphism, Axenfield eye anomalies, slight intellectual disability, and subsequently developed levodopa-responsive parkinsonism in early adulthood. Brain-computed tomography showed bilateral basal ganglia and subcortical calcifications. Magnetic resonance imaging revealed diffuse white matter lesions. A 99mTc TRODAT single-photon emission computed tomography scan revealed bilateral dopaminergic denervation. Whole-exome sequencing and oligonucleotide array-based comparative genomic hybridization revealed a 2.27-Mb chromosome 6pter-p24 deletion, which cosegregated within the family. CONCLUSIONS Our findings extended the current phenotypic spectrum of chromosome 6p25 deletion syndrome. © 2020 International Parkinson and Movement Disorder Society.
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Affiliation(s)
- Sung-Pin Fan
- Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Ni-Chung Lee
- Department of Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan
| | - Chin-Hsien Lin
- Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
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24
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Schaffenrath J, Keller A. New Insights in the Complexity and Functionality of the Neurovascular Unit. Handb Exp Pharmacol 2020; 273:33-57. [PMID: 33582883 DOI: 10.1007/164_2020_424] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The neurovascular unit (NVU) encompasses all brain cells and underlines that neurons, glia and brain vasculature are in intimate physical and functional association. Brain function is dependent on blood flow and local increases in blood flow in response to neural activity - functional hyperaemia takes place at the NVU. Although this is a vital function of the NVU, many studies have demonstrated that the NVU also performs other tasks. Blood vessels in the brain, which are composed of multiple cell types, are essential for correct brain development. They constitute the niche for brain stem cells, sense the environment and communicate changes to neural tissue, and control the immune quiescence of the CNS. In this brief chapter we will discuss new insights into the biology of NVU, which have further revealed the heterogeneity and complexity of the vascular tree and its neurovascular associations.
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Affiliation(s)
- Johanna Schaffenrath
- Department of Neurosurgery, Clinical Neuroscience Center, Zurich Neuroscience Center, Zurich University Hospital, Zurich University, Zurich, Switzerland
| | - Annika Keller
- Department of Neurosurgery, Clinical Neuroscience Center, Zurich Neuroscience Center, Zurich University Hospital, Zurich University, Zurich, Switzerland.
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25
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Corliss BA, Mathews C, Doty R, Rohde G, Peirce SM. Methods to label, image, and analyze the complex structural architectures of microvascular networks. Microcirculation 2019; 26:e12520. [PMID: 30548558 PMCID: PMC6561846 DOI: 10.1111/micc.12520] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/31/2018] [Accepted: 11/26/2018] [Indexed: 12/30/2022]
Abstract
Microvascular networks play key roles in oxygen transport and nutrient delivery to meet the varied and dynamic metabolic needs of different tissues throughout the body, and their spatial architectures of interconnected blood vessel segments are highly complex. Moreover, functional adaptations of the microcirculation enabled by structural adaptations in microvascular network architecture are required for development, wound healing, and often invoked in disease conditions, including the top eight causes of death in the Unites States. Effective characterization of microvascular network architectures is not only limited by the available techniques to visualize microvessels but also reliant on the available quantitative metrics that accurately delineate between spatial patterns in altered networks. In this review, we survey models used for studying the microvasculature, methods to label and image microvessels, and the metrics and software packages used to quantify microvascular networks. These programs have provided researchers with invaluable tools, yet we estimate that they have collectively attained low adoption rates, possibly due to limitations with basic validation, segmentation performance, and nonstandard sets of quantification metrics. To address these existing constraints, we discuss opportunities to improve effectiveness, rigor, and reproducibility of microvascular network quantification to better serve the current and future needs of microvascular research.
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Affiliation(s)
- Bruce A. Corliss
- Department of Biomedical EngineeringUniversity of VirginiaCharlottesvilleVirginia
| | - Corbin Mathews
- Department of Biomedical EngineeringUniversity of VirginiaCharlottesvilleVirginia
| | - Richard Doty
- Department of Biomedical EngineeringUniversity of VirginiaCharlottesvilleVirginia
| | - Gustavo Rohde
- Department of Biomedical EngineeringUniversity of VirginiaCharlottesvilleVirginia
| | - Shayn M. Peirce
- Department of Biomedical EngineeringUniversity of VirginiaCharlottesvilleVirginia
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26
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Whitesell TR, Chrystal PW, Ryu JR, Munsie N, Grosse A, French CR, Workentine ML, Li R, Zhu LJ, Waskiewicz A, Lehmann OJ, Lawson ND, Childs SJ. foxc1 is required for embryonic head vascular smooth muscle differentiation in zebrafish. Dev Biol 2019; 453:34-47. [PMID: 31199900 DOI: 10.1016/j.ydbio.2019.06.005] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/29/2019] [Accepted: 06/09/2019] [Indexed: 11/15/2022]
Abstract
Vascular smooth muscle of the head derives from neural crest, but developmental mechanisms and early transcriptional drivers of the vSMC lineage are not well characterized. We find that in early development, the transcription factor foxc1b is expressed in mesenchymal cells that associate with the vascular endothelium. Using timelapse imaging, we observe that foxc1b expressing mesenchymal cells differentiate into acta2 expressing vascular mural cells. We show that in zebrafish, while foxc1b is co-expressed in acta2 positive smooth muscle cells that associate with large diameter vessels, it is not co-expressed in capillaries where pdgfrβ positive pericytes are located. In addition to being an early marker of the lineage, foxc1 is essential for vSMC differentiation; we find that foxc1 loss of function mutants have defective vSMC differentiation and that early genetic ablation of foxc1b or acta2 expressing populations blocks vSMC differentiation. Furthermore, foxc1 is expressed upstream of acta2 and is required for acta2 expression in vSMCs. Using RNA-Seq we determine an enriched intersectional gene expression profile using dual expression of foxc1b and acta2 to identify novel vSMC markers. Taken together, our data suggests that foxc1 is a marker of vSMCs and plays a critical functional role in promoting their differentiation.
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Affiliation(s)
- Thomas R Whitesell
- Alberta Children's Hospital Research Institute, University of Calgary, Canada; Department of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada, T2N 4N1
| | - Paul W Chrystal
- Departments of Ophthalmology, and Medical Genetics, University of Alberta, Edmonton, Alberta, Canada; Department of Biological Sciences, CW405, Biological Sciences Bldg., 11455, Saskatchewan Dr., University of Alberta, Edmonton, AB, T6G 2E9, Canada; Women & Children's Health Research Institute, ECHA 4-081, 11405 87, Ave NW, University of Alberta, Edmonton, AB, T6G 1C9, Canada; Neurosciences and Mental Health Institute, 4-120 Katz Group Centre, University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Jae-Ryeon Ryu
- Alberta Children's Hospital Research Institute, University of Calgary, Canada; Department of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada, T2N 4N1
| | - Nicole Munsie
- Alberta Children's Hospital Research Institute, University of Calgary, Canada; Department of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada, T2N 4N1
| | - Ann Grosse
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA, USA, 01605
| | - Curtis R French
- Department of Biological Sciences, CW405, Biological Sciences Bldg., 11455, Saskatchewan Dr., University of Alberta, Edmonton, AB, T6G 2E9, Canada; Women & Children's Health Research Institute, ECHA 4-081, 11405 87, Ave NW, University of Alberta, Edmonton, AB, T6G 1C9, Canada; Neurosciences and Mental Health Institute, 4-120 Katz Group Centre, University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Matthew L Workentine
- Faculty of Veterinary Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada, T2N 4N1
| | - Rui Li
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA, USA, 01605
| | - Lihua Julie Zhu
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA, USA, 01605; Program in Bioinformatics and Integrative Biology, Program in Molecular Medicine, University of Massachusetts Medical School, Worcester, MA, USA, 01605
| | - Andrew Waskiewicz
- Department of Biological Sciences, CW405, Biological Sciences Bldg., 11455, Saskatchewan Dr., University of Alberta, Edmonton, AB, T6G 2E9, Canada; Women & Children's Health Research Institute, ECHA 4-081, 11405 87, Ave NW, University of Alberta, Edmonton, AB, T6G 1C9, Canada; Neurosciences and Mental Health Institute, 4-120 Katz Group Centre, University of Alberta, Edmonton, AB, T6G 2E1, Canada
| | - Ordan J Lehmann
- Departments of Ophthalmology, and Medical Genetics, University of Alberta, Edmonton, Alberta, Canada
| | - Nathan D Lawson
- Department of Molecular, Cell, and Cancer Biology, University of Massachusetts Medical School, 364 Plantation Street, Worcester, MA, USA, 01605
| | - Sarah J Childs
- Alberta Children's Hospital Research Institute, University of Calgary, Canada; Department of Biochemistry and Molecular Biology, University of Calgary, 3330 Hospital Drive NW, Calgary, Alberta, Canada, T2N 4N1.
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27
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Faal T, Phan DTT, Davtyan H, Scarfone VM, Varady E, Blurton-Jones M, Hughes CCW, Inlay MA. Induction of Mesoderm and Neural Crest-Derived Pericytes from Human Pluripotent Stem Cells to Study Blood-Brain Barrier Interactions. Stem Cell Reports 2019; 12:451-460. [PMID: 30745035 PMCID: PMC6409424 DOI: 10.1016/j.stemcr.2019.01.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 01/25/2023] Open
Abstract
In the CNS, perivascular cells (“pericytes”) associate with endothelial cells to mediate the formation of tight junctions essential to the function of the blood-brain barrier (BBB). The BBB protects the CNS by regulating the flow of nutrients and toxins into and out of the brain. BBB dysfunction has been implicated in the progression of Alzheimer's disease (AD), but the role of pericytes in BBB dysfunction in AD is not well understood. In the developing embryo, CNS pericytes originate from two sources: mesoderm and neural crest. In this study, we report two protocols using mesoderm or neural crest intermediates, to generate brain-specific pericyte-like cells from induced pluripotent stem cell (iPSC) lines created from healthy and AD patients. iPSC-derived pericytes display stable expression of pericyte surface markers and brain-specific genes and are functionally capable of increasing vascular tube formation and endothelial barrier properties. Mesoderm and neural crest-derived pericytes (PCs) from hPSCs termed mPCs and ncPCs mPCs and ncPCs express general and brain-specific pericyte genes mPCs and ncPCs associate with and promote barrier properties of endothelial cells WNT is important, but not necessary for neural crest-derived PC specification
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Affiliation(s)
- Tannaz Faal
- Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine CA 92697, USA; Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine CA 92697, USA
| | - Duc T T Phan
- Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine CA 92697, USA
| | - Hayk Davtyan
- Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine CA 92697, USA; Department of Neurobiology and Behavior, University of California Irvine, Irvine CA 92697, USA
| | - Vanessa M Scarfone
- Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine CA 92697, USA
| | - Erika Varady
- Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine CA 92697, USA; Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine CA 92697, USA
| | - Mathew Blurton-Jones
- Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine CA 92697, USA; Department of Neurobiology and Behavior, University of California Irvine, Irvine CA 92697, USA
| | - Christopher C W Hughes
- Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine CA 92697, USA
| | - Matthew A Inlay
- Sue and Bill Gross Stem Cell Research Center, University of California Irvine, Irvine CA 92697, USA; Department of Molecular Biology and Biochemistry, University of California Irvine, Irvine CA 92697, USA.
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28
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Henn D, Abu-Halima M, Wermke D, Falkner F, Thomas B, Köpple C, Ludwig N, Schulte M, Brockmann MA, Kim YJ, Sacks JM, Kneser U, Keller A, Meese E, Schmidt VJ. MicroRNA-regulated pathways of flow-stimulated angiogenesis and vascular remodeling in vivo. J Transl Med 2019; 17:22. [PMID: 30635008 PMCID: PMC6330440 DOI: 10.1186/s12967-019-1767-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Accepted: 01/02/2019] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Vascular shear stress promotes endothelial cell sprouting in vitro. The impact of hemodynamic forces on microRNA (miRNA) and gene expression within growing vascular networks in vivo, however, remain poorly investigated. Arteriovenous (AV) shunts are an established model for induction of neoangiogenesis in vivo and can serve as a tool for analysis of hemodynamic effects on miRNA and gene expression profiles over time. METHODS AV shunts were microsurgically created in rats and explanted on postoperative days 5, 10 and 15. Neoangiogenesis was confirmed by histologic analysis and micro-computed tomography. MiRNA and gene expression profiles were determined in tissue specimens from AV shunts by microarray analysis and quantitative real-time polymerase chain reaction and compared with sham-operated veins by bioinformatics analysis. Changes in protein expression within AV shunt endothelial cells were determined by immunohistochemistry. RESULTS Samples from AV shunts exhibited a strong overexpression of proangiogenic cytokines, oxygenation-associated genes (HIF1A, HMOX1), and angiopoetic growth factors. Significant inverse correlations of the expressions of miR-223-3p, miR-130b-3p, miR-19b-3p, miR-449a-5p, and miR-511-3p which were up-regulated in AV shunts, and miR-27b-3p, miR-10b-5p, let-7b-5p, and let-7c-5p, which were down-regulated in AV shunts, with their predicted interacting targets C-X-C chemokine receptor 2 (CXCR2), interleukin-1 alpha (IL1A), ephrin receptor kinase 2 (EPHA2), synaptojanin-2 binding protein (SYNJ2BP), forkhead box C1 (FOXC1) were present. CXCL2 and IL1A overexpression in AV shunt endothelium was confirmed at the protein level by immunohistochemistry. CONCLUSIONS Our data indicate that flow-stimulated angiogenesis is determined by an upregulation of cytokines, oxygenation associated genes and miRNA-dependent regulation of FOXC1, EPHA2 and SYNJ2BP.
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Affiliation(s)
- Dominic Henn
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany
| | - Masood Abu-Halima
- Institute of Human Genetics, Saarland University, Homburg-Saar, Germany
| | - Dominik Wermke
- Institute of Clinical Bioinformatics, Saarland University, Saarbruecken, Germany
| | - Florian Falkner
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany
| | - Benjamin Thomas
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany
| | - Christoph Köpple
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany
| | - Nicole Ludwig
- Institute of Human Genetics, Saarland University, Homburg-Saar, Germany
| | - Matthias Schulte
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany
| | - Marc A Brockmann
- Department of Neuroradiology, University Medical Center Mainz, Mainz, Germany
| | - Yoo-Jin Kim
- Institute of Pathology, Kaiserslautern, Germany
| | - Justin M Sacks
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Ulrich Kneser
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany
| | - Andreas Keller
- Institute of Clinical Bioinformatics, Saarland University, Saarbruecken, Germany
| | - Eckart Meese
- Institute of Human Genetics, Saarland University, Homburg-Saar, Germany
| | - Volker J Schmidt
- Department of Hand, Plastic and Reconstructive Surgery, University of Heidelberg, BG Trauma Center Ludwigshafen, Ludwig-Guttmann Str. 13, 67071, Ludwigshafen, Germany.
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29
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Rutten-Jacobs LCA, Rost NS. Emerging insights from the genetics of cerebral small-vessel disease. Ann N Y Acad Sci 2019; 1471:5-17. [PMID: 30618052 DOI: 10.1111/nyas.13998] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/04/2018] [Accepted: 12/12/2018] [Indexed: 01/09/2023]
Abstract
Cerebral small-vessel disease (cSVD) is a common cause of stroke, functional decline, vascular cognitive impairment, and dementia. Pathological processes in the brain's microcirculation are tightly interwoven with pathology in the brain parenchyma, and this interaction has been conceptualized as the neurovascular unit (NVU). Despite intensive research efforts to decipher the NVU's structure and function to date, molecular mechanisms underlying cSVD remain poorly understood, which hampers the development of cSVD-specific therapies. Important steps forward in understanding the disease mechanisms underlying cSVD have been made using genetic approaches in studies of both monogenic and sporadic SVD. We provide an overview of the NVU's structure and function, the implications for cSVD, and the underlying molecular mechanisms of dysfunction that have emerged from recent genetic studies of both monogenic and sporadic diseases of the small cerebral vasculature.
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Affiliation(s)
- Loes C A Rutten-Jacobs
- Population Health Sciences, German Center for Neurodegenerative Diseases (DZNE), Bonn, Germany
| | - Natalia S Rost
- Department of Neurology, J. Philip Kistler Stroke Research Center, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
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30
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Kearns KN, Yagmurlu K, Chen CJ, Jane J, Park MS, Kalani MYS. Deletion of 6p25.3 Is Associated with Cerebrovascular Dolichoectasia: Report of 2 Cases. Pediatr Neurosurg 2019; 54:196-200. [PMID: 30889612 DOI: 10.1159/000497148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Accepted: 01/21/2019] [Indexed: 11/19/2022]
Abstract
Developmental dolichoectasia of the intracranial vessels is a rare occurrence. The authors report 2 sibling pediatric patients who were born with 6p25.3 deletion, associated with carotid and vertebrobasilar dolichoectasia. MRI imaging of both children showed asymptomatic elongation and dilation of the vertebrobasilar system and "kissing" carotid arteries. A microarray analysis was also performed for both patients, which identified a 1.5-Mb deletion of 6p25.3 covering 15 genes including FOXC1, which has been implicated in defects in vascular morphogenesis.
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Affiliation(s)
- Kathryn N Kearns
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - Kaan Yagmurlu
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - Ching-Jen Chen
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - John Jane
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - Min S Park
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA
| | - M Yashar S Kalani
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia, USA,
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31
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Bonney S, Dennison BJC, Wendlandt M, Siegenthaler JA. Retinoic Acid Regulates Endothelial β-catenin Expression and Pericyte Numbers in the Developing Brain Vasculature. Front Cell Neurosci 2018; 12:476. [PMID: 30568578 PMCID: PMC6290079 DOI: 10.3389/fncel.2018.00476] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Accepted: 11/21/2018] [Indexed: 01/24/2023] Open
Abstract
The acquisition of brain vascular properties, like tight junctions and pericytes, to form the blood-brain barrier (BBB) is crucial for a properly functioning central nervous system (CNS). Endothelial WNT signaling is a known driver of brain vascular development and BBB properties, however, it is unclear how endothelial WNT signaling is regulated. We recently showed that mouse embryos with disruptions in endothelial retinoic acid (RA) signaling have ectopic WNT signaling in the brain vasculature. Using immunohistochemistical analysis, we show that increased vascular WNT signaling in RA mutants (Pdgfbicre; dnRAR403-flox and Rdh10 mutants) is associated with elevated expression of the WNT transcriptional effector, β-catenin, in the brain endothelium. In vitro immunocytochemistry and proximity ligation studies in brain endothelial cells reveal that RA, through its receptor RARα, regulates β-catenin expression in brain endothelial cells via transcriptional suppression and phosphorylation events that targets β-catenin for proteasomal degradation, the latter dependent on PKCα. We find that one function of RA in regulating vascular WNT signaling is to modulate the pericyte numbers in the developing brain vasculature. RA-mediated regulation of vascular WNT signaling could be needed to prevent over-recruitment of pericytes that might impair endothelial-pericyte interactions crucial for vascular stability.
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Affiliation(s)
- Stephanie Bonney
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States.,Cell Biology, Stem Cells and Development Graduate Program, University of Colorado, Aurora, CO, United States
| | - Brenna J C Dennison
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States.,Cell Biology, Stem Cells and Development Graduate Program, University of Colorado, Aurora, CO, United States
| | - Megan Wendlandt
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
| | - Julie A Siegenthaler
- Section of Developmental Biology, Department of Pediatrics, University of Colorado, Aurora, CO, United States
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32
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Dubrac A, Künzel SE, Künzel SH, Li J, Chandran RR, Martin K, Greif DM, Adams RH, Eichmann A. NCK-dependent pericyte migration promotes pathological neovascularization in ischemic retinopathy. Nat Commun 2018; 9:3463. [PMID: 30150707 PMCID: PMC6110853 DOI: 10.1038/s41467-018-05926-7] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 07/04/2018] [Indexed: 12/20/2022] Open
Abstract
Pericytes are mural cells that surround capillaries and control angiogenesis and capillary barrier function. During sprouting angiogenesis, endothelial cell-derived platelet-derived growth factor-B (PDGF-B) regulates pericyte proliferation and migration via the platelet-derived growth factor receptor-β (PDGFRβ). PDGF-B overexpression has been associated with proliferative retinopathy, but the underlying mechanisms remain poorly understood. Here we show that abnormal, α-SMA-expressing pericytes cover angiogenic sprouts and pathological neovascular tufts (NVTs) in a mouse model of oxygen-induced retinopathy. Genetic lineage tracing demonstrates that pericytes acquire α-SMA expression during NVT formation. Pericyte depletion through inducible endothelial-specific knockout of Pdgf-b decreases NVT formation and impairs revascularization. Inactivation of the NCK1 and NCK2 adaptor proteins inhibits pericyte migration by preventing PDGF-B-induced phosphorylation of PDGFRβ at Y1009 and PAK activation. Loss of Nck1 and Nck2 in mural cells prevents NVT formation and vascular leakage and promotes revascularization, suggesting PDGFRβ-Y1009/NCK signaling as a potential target for the treatment of retinopathies. Pericytes are perivascular cells that regulate blood vessel formation and function. Here Dubrac et al. show that pericyte recruitment contributes to pathological neovascularisation in a mouse model of ischemic retinopathy, and that this depends on the regulation of PDGF-B signaling by NCK adaptor proteins.
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Affiliation(s)
- Alexandre Dubrac
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA.
| | - Steffen E Künzel
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Sandrine H Künzel
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Jinyu Li
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Rachana Radhamani Chandran
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Kathleen Martin
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Daniel M Greif
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA
| | - Ralf H Adams
- Department of Tissue Morphogenesis and University of Münster, Faculty of Medicine, Max Planck Institute for Molecular Biomedicine, 48149, Münster, Germany
| | - Anne Eichmann
- Department of Internal Medicine, Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, CT, 06511, USA. .,INSERM U970, Paris Cardiovascular Research Center, 75015, Paris, France. .,Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT, 06520, USA.
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33
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Abstract
This review by O'Brown et al. discusses the cellular nature of the blood–brain barrier (BBB) and the conservation and variation of BBB function across taxa. It compares the BBB across organisms in order to provide insight into the human BBB both under normal physiological conditions and in neurological diseases. The blood–brain barrier (BBB) restricts free access of molecules between the blood and the brain and is essential for regulating the neural microenvironment. Here, we describe how the BBB was initially characterized and how the current field evaluates barrier properties. We next detail the cellular nature of the BBB and discuss both the conservation and variation of BBB function across taxa. Finally, we examine our current understanding of mouse and zebrafish model systems, as we expect that comparison of the BBB across organisms will provide insight into the human BBB under normal physiological conditions and in neurological diseases.
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Affiliation(s)
- Natasha M O'Brown
- Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Sarah J Pfau
- Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA
| | - Chenghua Gu
- Department of Neurobiology, Harvard Medical School, Boston, Massachusetts 02115, USA
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Abstract
Stroke is a cerebrovascular disorder that affects many people worldwide. In addition to the well-established functions of astrocytes and microglia in stroke pathogenesis, pericytes also play an important role in stroke progression and recovery. As perivascular multi-potent cells and an important component of the blood–brain barrier (BBB), pericytes have been shown to exert a large variety of functions, including serving as stem/progenitor cells and maintaining BBB integrity. Here in this review, we summarize the roles of pericytes in stroke pathogenesis, with a focus on their effects in cerebral blood flow, BBB integrity, angiogenesis, immune responses, scar formation and fibrosis.
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Affiliation(s)
- Jyoti Gautam
- 1 Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA, USA
| | - Yao Yao
- 1 Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, University of Georgia, Athens, GA, USA
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Role of Zic Family Proteins in Transcriptional Regulation and Chromatin Remodeling. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1046:353-380. [DOI: 10.1007/978-981-10-7311-3_18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Kirschen GW, Kéry R, Liu H, Ahamad A, Chen L, Akmentin W, Kumar R, Levine J, Xiong Q, Ge S. Genetic dissection of the neuro-glio-vascular machinery in the adult brain. Mol Brain 2018; 11:2. [PMID: 29335006 PMCID: PMC5769320 DOI: 10.1186/s13041-017-0345-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 12/21/2017] [Indexed: 12/30/2022] Open
Abstract
The adult brain actively controls its metabolic homeostasis via the circulatory system at the blood brain barrier interface. The mechanisms underlying the functional coupling from neuron to vessel remain poorly understood. Here, we established a novel method to genetically isolate the individual components of this coupling machinery using a combination of viral vectors. We first discovered a surprising non-uniformity of the glio-vascular structure in different brain regions. We carried out a viral injection screen and found that intravenous Canine Adenovirus 2 (CAV2) preferentially targeted perivascular astrocytes throughout the adult brain, with sparing of the hippocampal hilus from infection. Using this new intravenous method to target astrocytes, we selectively ablated these cells and observed severe defects in hippocampus-dependent contextual memory and the metabolically regulated process of hippocampal neurogenesis. Combined with AAV9 targeting of neurons and endothelial cells, all components of the neuro-glio-vascular machinery can be simultaneously labeled for genetic manipulation. Together, we demonstrate a novel method, which we term CATNAP (CAV/AAV Targeting of Neurons and Astrocytes Perivascularly), to target and manipulate the neuro-glio-vascular machinery in the adult brain.
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Affiliation(s)
- Gregory W Kirschen
- Medical Scientist Training Program, Stony Brook, New York, USA.,Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Rachel Kéry
- Medical Scientist Training Program, Stony Brook, New York, USA.,Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Hanxiao Liu
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Afrinash Ahamad
- School of Health Technology & Management, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Liang Chen
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Wendy Akmentin
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Ramya Kumar
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Joel Levine
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA
| | - Qiaojie Xiong
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA.
| | - Shaoyu Ge
- Department of Neurobiology & Behavior, SUNY Stony Brook, Stony Brook, NY, 11794, USA.
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Zic Family Proteins in Emerging Biomedical Studies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1046:233-248. [DOI: 10.1007/978-981-10-7311-3_12] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Chertok VM, Zakharchuk NV, Chertok AG. [The cellular and molecular mechanisms of angiogenesis regulation in the brain]. Zh Nevrol Psikhiatr Im S S Korsakova 2017; 117:43-55. [PMID: 28980581 DOI: 10.17116/jnevro20171178243-55] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review presents the data on cellular and molecular mechanisms of angiogenesis regulation linked to the vascular epithelium. According to current conceptions, activated endothelial cells and their predecessors (progenitor cells) are involved in the regulation of angiogenesis. These cells synthesize angiogenic molecules differing by the chemical structure and mechanism of biological effect and allowing a direct or indirect control over each stage of angiogenesis. Both the excess and insufficient angiogenesis can lead to fast and irreversible changes in nervous tissue under certain conditions. For this reason, the balance in the system of molecular stimulators and inhibitors of angiogenesis is especially important for brain function. Without adequate reperfusion of an affected brain area the post-stroke neuroreparation, which can be provided with timely stimulation of angiogenesis, is unattainable and the intensification of this process in tumors, on the contrary, has adverse consequences. Growth of a tumor and its metastatic spread are substantially associated with an increase in the level of tumor tissue vascularization, and blocking angiogenesis is often the only productive way to limit the growth of a tumor. However our knowledge of mechanisms of angiogenesis regulation in the brain on the cellular and molecular level in physiological and pathological conditions is still insufficient, and, therefore, the influence of angiogenic factors on tissue targets do not always cause the expected effects.
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Affiliation(s)
- V M Chertok
- Pacific State Medical University, Vladivostok, Russia
| | | | - A G Chertok
- Pacific State Medical University, Vladivostok, Russia
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Chow BW, Gu C. Gradual Suppression of Transcytosis Governs Functional Blood-Retinal Barrier Formation. Neuron 2017; 93:1325-1333.e3. [PMID: 28334606 DOI: 10.1016/j.neuron.2017.02.043] [Citation(s) in RCA: 113] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 11/14/2016] [Accepted: 02/22/2017] [Indexed: 12/26/2022]
Abstract
Blood-central nervous system (CNS) barriers partition neural tissues from the blood, providing a homeostatic environment for proper neural function. The endothelial cells that form blood-CNS barriers have specialized tight junctions and low rates of transcytosis to limit the flux of substances between blood and CNS. However, the relative contributions of these properties to CNS barrier permeability are unknown. Here, by studying functional blood-retinal barrier (BRB) formation in mice, we found that immature vessel leakage occurs entirely through transcytosis, as specialized tight junctions are functional as early as vessel entry into the CNS. A functional barrier forms only when transcytosis is gradually suppressed during development. Mutant mice with elevated or reduced levels of transcytosis have delayed or precocious sealing of the BRB, respectively. Therefore, the temporal regulation of transcytosis governs the development of a functional BRB, and suppression of transcytosis is a principal contributor for functional barrier formation.
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Affiliation(s)
- Brian Wai Chow
- Department of Neurobiology, Harvard Medical School, 220 Longwood Ave., Boston, MA 02115, USA
| | - Chenghua Gu
- Department of Neurobiology, Harvard Medical School, 220 Longwood Ave., Boston, MA 02115, USA.
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Diverse Functions of Retinoic Acid in Brain Vascular Development. J Neurosci 2017; 36:7786-801. [PMID: 27445154 DOI: 10.1523/jneurosci.3952-15.2016] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Accepted: 06/15/2016] [Indexed: 01/24/2023] Open
Abstract
UNLABELLED As neural structures grow in size and increase metabolic demand, the CNS vasculature undergoes extensive growth, remodeling, and maturation. Signals from neural tissue act on endothelial cells to stimulate blood vessel ingression, vessel patterning, and acquisition of mature brain vascular traits, most notably the blood-brain barrier. Using mouse genetic and in vitro approaches, we identified retinoic acid (RA) as an important regulator of brain vascular development via non-cell-autonomous and cell-autonomous regulation of endothelial WNT signaling. Our analysis of globally RA-deficient embryos (Rdh10 mutants) points to an important, non-cell-autonomous function for RA in the development of the vasculature in the neocortex. We demonstrate that Rdh10 mutants have severe defects in cerebrovascular development and that this phenotype correlates with near absence of endothelial WNT signaling, specifically in the cerebrovasculature, and substantially elevated expression of WNT inhibitors in the neocortex. We show that RA can suppress the expression of WNT inhibitors in neocortical progenitors. Analysis of vasculature in non-neocortical brain regions suggested that RA may have a separate, cell-autonomous function in brain endothelial cells to inhibit WNT signaling. Using both gain and loss of RA signaling approaches, we show that RA signaling in brain endothelial cells can inhibit WNT-β-catenin transcriptional activity and that this is required to moderate the expression of WNT target Sox17. From this, a model emerges in which RA acts upstream of the WNT pathway via non-cell-autonomous and cell-autonomous mechanisms to ensure the formation of an adequate and stable brain vascular plexus. SIGNIFICANCE STATEMENT Work presented here provides novel insight into important yet little understood aspects of brain vascular development, implicating for the first time a factor upstream of endothelial WNT signaling. We show that RA is permissive for cerebrovascular growth via suppression of WNT inhibitor expression in the neocortex. RA also functions cell-autonomously in brain endothelial cells to modulate WNT signaling and its downstream target, Sox17. The significance of this is although endothelial WNT signaling is required for neurovascular development, too much endothelial WNT signaling, as well as overexpression of its target Sox17, are detrimental. Therefore, RA may act as a "brake" on endothelial WNT signaling and Sox17 to ensure normal brain vascular development.
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New insights into mechanisms of small vessel disease stroke from genetics. Clin Sci (Lond) 2017; 131:515-531. [DOI: 10.1042/cs20160825] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Revised: 01/03/2017] [Accepted: 01/06/2017] [Indexed: 02/02/2023]
Abstract
Cerebral small vessel disease (SVD) is a common cause of lacunar strokes, vascular cognitive impairment (VCI) and vascular dementia. SVD is thought to result in reduced cerebral blood flow, impaired cerebral autoregulation and increased blood–brain barrier (BBB) permeability. However, the molecular mechanisms underlying SVD are incompletely understood. Recent studies in monogenic forms of SVD, such as cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL), and ‘sporadic’ SVD have shed light on possible disease mechanisms in SVD. Proteomic and biochemical studies in post-mortem monogenic SVD patients, as well as in animal models of monogenic disease have suggested that disease pathways are shared between different types of monogenic disease, often involving the impairment of extracellular matrix (ECM) function. In addition, genetic studies in ‘sporadic’ SVD have also shown that the disease is highly heritable, particularly among young-onset stroke patients, and that common variants in monogenic disease genes may contribute to disease processes in some SVD subtypes. Genetic studies in sporadic lacunar stroke patients have also suggested distinct genetic mechanisms between subtypes of SVD. Genome-wide association studies (GWAS) have also shed light on other potential disease mechanisms that may be shared with other diseases involving the white matter, or with pathways implicated in monogenic disease. This review brings together recent data from studies in monogenic SVD and genetic studies in ‘sporadic’ SVD. It aims to show how these provide new insights into the pathogenesis of SVD, and highlights the possible convergence of disease mechanisms in monogenic and sporadic SVD.
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Han B, Bhowmick N, Qu Y, Chung S, Giuliano AE, Cui X. FOXC1: an emerging marker and therapeutic target for cancer. Oncogene 2017; 36:3957-3963. [PMID: 28288141 PMCID: PMC5652000 DOI: 10.1038/onc.2017.48] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 02/03/2017] [Accepted: 02/04/2017] [Indexed: 02/07/2023]
Abstract
The Forkhead box C1 (FOXC1) transcription factor is involved in normal embryonic development and regulates the development and function of many organs. Most recently, a large body of literature has shown that FOXC1 plays a critical role in tumor development and metastasis. Clinical studies have demonstrated that elevated FOXC1 expression is associated with poor prognosis in many cancer subtypes, such as basal-like breast cancer (BLBC). FOXC1 is highly and specifically expressed in BLBC as opposed to other breast cancer subtypes. Its functions in breast cancer have been extensively explored. This review will summarize current knowledge on the function and regulation of FOXC1 in tumor development and progression with a focus on BLBC as well as the implications of these new findings in cancer diagnosis and treatment.
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Affiliation(s)
- B Han
- Department of Surgery, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - N Bhowmick
- Department of Medicine, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - Y Qu
- Department of Surgery, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - S Chung
- Department of Surgery, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - A E Giuliano
- Department of Surgery, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
| | - X Cui
- Department of Surgery, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA
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Mishra S, Choe Y, Pleasure SJ, Siegenthaler JA. Cerebrovascular defects in Foxc1 mutants correlate with aberrant WNT and VEGF-A pathways downstream of retinoic acid from the meninges. Dev Biol 2016; 420:148-165. [PMID: 27671872 DOI: 10.1016/j.ydbio.2016.09.019] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 09/22/2016] [Accepted: 09/22/2016] [Indexed: 12/28/2022]
Abstract
Growth and maturation of the cerebrovasculature is a vital event in neocortical development however mechanisms that control cerebrovascular development remain poorly understood. Mutations in or deletions that include the FOXC1 gene are associated with congenital cerebrovascular anomalies and increased stroke risk in patients. Foxc1 mutant mice display severe cerebrovascular hemorrhage at late gestational ages. While these data demonstrate Foxc1 is required for cerebrovascular development, its broad expression in the brain vasculature combined with Foxc1 mutant's complex developmental defects have made it difficult to pinpoint its function(s). Using global and conditional Foxc1 mutants, we find 1) significant cerebrovascular growth defects precede cerebral hemorrhage and 2) expression of Foxc1 in neural crest-derived meninges and brain pericytes, though not endothelial cells, is required for normal cerebrovascular development. We provide evidence that reduced levels of meninges-derived retinoic acid (RA), caused by defects in meninges formation in Foxc1 mutants, is a major contributing factor to the cerebrovascular growth defects in Foxc1 mutants. We provide data that suggests that meninges-derived RA ensures adequate growth of the neocortical vasculature via regulating expression of WNT pathway proteins and neural progenitor derived-VEGF-A. Our findings offer the first evidence for a role of the meninges in brain vascular development and provide new insight into potential causes of cerebrovascular defects in patients with FOXC1 mutations.
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Affiliation(s)
- Swati Mishra
- Department of Pediatrics, Section of Developmental Biology, University of Colorado, School of Medicine Aurora, CO 80045, USA
| | - Youngshik Choe
- Department of Neurology, Programs in Neuroscience and Developmental Biology, Institute for Regenerative Medicine, UC San Francisco, San Francisco, CA 94158, USA
| | - Samuel J Pleasure
- Department of Neurology, Programs in Neuroscience and Developmental Biology, Institute for Regenerative Medicine, UC San Francisco, San Francisco, CA 94158, USA
| | - Julie A Siegenthaler
- Department of Pediatrics, Section of Developmental Biology, University of Colorado, School of Medicine Aurora, CO 80045, USA.
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Identification of additional risk loci for stroke and small vessel disease: a meta-analysis of genome-wide association studies. Lancet Neurol 2016; 15:695-707. [PMID: 27068588 PMCID: PMC4943223 DOI: 10.1016/s1474-4422(16)00102-2] [Citation(s) in RCA: 107] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 02/16/2016] [Accepted: 02/26/2016] [Indexed: 01/06/2023]
Abstract
BACKGROUND Genetic determinants of stroke, the leading neurological cause of death and disability, are poorly understood and have seldom been explored in the general population. Our aim was to identify additional loci for stroke by doing a meta-analysis of genome-wide association studies. METHODS For the discovery sample, we did a genome-wide analysis of common genetic variants associated with incident stroke risk in 18 population-based cohorts comprising 84 961 participants, of whom 4348 had stroke. Stroke diagnosis was ascertained and validated by the study investigators. Mean age at stroke ranged from 45·8 years to 76·4 years, and data collection in the studies took place between 1948 and 2013. We did validation analyses for variants yielding a significant association (at p<5 × 10(-6)) with all-stroke, ischaemic stroke, cardioembolic ischaemic stroke, or non-cardioembolic ischaemic stroke in the largest available cross-sectional studies (70 804 participants, of whom 19 816 had stroke). Summary-level results of discovery and follow-up stages were combined using inverse-variance weighted fixed-effects meta-analysis, and in-silico lookups were done in stroke subtypes. For genome-wide significant findings (at p<5 × 10(-8)), we explored associations with additional cerebrovascular phenotypes and did functional experiments using conditional (inducible) deletion of the probable causal gene in mice. We also studied the expression of orthologs of this probable causal gene and its effects on cerebral vasculature in zebrafish mutants. FINDINGS We replicated seven of eight known loci associated with risk for ischaemic stroke, and identified a novel locus at chromosome 6p25 (rs12204590, near FOXF2) associated with risk of all-stroke (odds ratio [OR] 1·08, 95% CI 1·05-1·12, p=1·48 × 10(-8); minor allele frequency 21%). The rs12204590 stroke risk allele was also associated with increased MRI-defined burden of white matter hyperintensity-a marker of cerebral small vessel disease-in stroke-free adults (n=21 079; p=0·0025). Consistently, young patients (aged 2-32 years) with segmental deletions of FOXF2 showed an extensive burden of white matter hyperintensity. Deletion of Foxf2 in adult mice resulted in cerebral infarction, reactive gliosis, and microhaemorrhage. The orthologs of FOXF2 in zebrafish (foxf2b and foxf2a) are expressed in brain pericytes and mutant foxf2b(-/-) cerebral vessels show decreased smooth muscle cell and pericyte coverage. INTERPRETATION We identified common variants near FOXF2 that are associated with increased stroke susceptibility. Epidemiological and experimental data suggest that FOXF2 mediates this association, potentially via differentiation defects of cerebral vascular mural cells. Further expression studies in appropriate human tissues, and further functional experiments with long follow-up periods are needed to fully understand the underlying mechanisms. FUNDING NIH, NINDS, NHMRC, CIHR, European national research institutions, Fondation Leducq.
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Ulvmar MH, Martinez-Corral I, Stanczuk L, Mäkinen T. Pdgfrb-Cre targets lymphatic endothelial cells of both venous and non-venous origins. Genesis 2016; 54:350-8. [PMID: 27060598 PMCID: PMC5021155 DOI: 10.1002/dvg.22939] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/16/2016] [Accepted: 04/02/2016] [Indexed: 01/10/2023]
Abstract
The Pdgfrb‐Cre line has been used as a tool to specifically target pericytes and vascular smooth muscle cells. Recent studies showed additional targeting of cardiac and mesenteric lymphatic endothelial cells (LECs) by the Pdgfrb‐Cre transgene. In the heart, this was suggested to provide evidence for a previously unknown nonvenous source of LECs originating from yolk sac (YS) hemogenic endothelium (HemEC). Here we show that Pdgfrb‐Cre does not, however, target YS HemEC or YS‐derived erythro‐myeloid progenitors (EMPs). Instead, a high proportion of ECs in embryonic blood vessels of multiple organs, as well as venous‐derived LECs were targeted. Assessment of temporal Cre activity using the R26‐mTmG double reporter suggested recent occurrence of Pdgfrb‐Cre recombination in both blood and lymphatic ECs. It thus cannot be excluded that Pdgfrb‐Cre mediated targeting of LECs is due to de novo expression of the Pdgfrb‐Cre transgene or their previously established venous endothelial origin. Importantly, Pdgfrb‐Cre targeting of LECs does not provide evidence for YS HemEC origin of the lymphatic vasculature. Our results highlight the need for careful interpretation of lineage tracing using constitutive Cre lines that cannot discriminate active from historical expression. The early vascular targeting by the Pdgfrb‐Cre also warrants consideration for its use in studies of mural cells. genesis 54:350–358, 2016. © 2016 The Authors. Genesis Published by Wiley Periodicals, Inc.
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Affiliation(s)
- Maria H Ulvmar
- Department of Immunology Genetics and Pathology, Uppsala University, Dag Hammarskjöldsväg 20, 751 85, Uppsala, Sweden
| | - Ines Martinez-Corral
- Department of Immunology Genetics and Pathology, Uppsala University, Dag Hammarskjöldsväg 20, 751 85, Uppsala, Sweden
| | - Lukas Stanczuk
- Department of Immunology Genetics and Pathology, Uppsala University, Dag Hammarskjöldsväg 20, 751 85, Uppsala, Sweden
| | - Taija Mäkinen
- Department of Immunology Genetics and Pathology, Uppsala University, Dag Hammarskjöldsväg 20, 751 85, Uppsala, Sweden
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Perturbations of the cerebrovascular matrisome: A convergent mechanism in small vessel disease of the brain? J Cereb Blood Flow Metab 2016; 36:143-57. [PMID: 25853907 PMCID: PMC4758555 DOI: 10.1038/jcbfm.2015.62] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 03/17/2015] [Indexed: 02/08/2023]
Abstract
The term matrisome refers to the ensemble of proteins constituting the extracellular matrix (ECM) (core matrisome) as well as the proteins associated with the ECM. Every organ has an ECM with a unique composition that not only provides the support and anchorage for cells, but also controls fundamental cellular processes as diverse as differentiation, survival, proliferation, and polarity. The current knowledge of the matrisome of small brain vessels is reviewed with a focus on the basement membrane (BM), a specialized form of ECM located at the interface between endothelial cells, contractile cells (smooth muscle cells and pericytes), and astrocyte endfeet—a very strategic location in the communication pathway between the cerebral microcirculation and astrocytes. We discuss some of the most recent genetic data and relevant findings from experimental models of nonamyloid cerebral small vessel disease (SVD). We propose the concept that perturbations of the cerebrovascular matrisome is a convergent pathologic pathway in monogenic forms of SVD, and is likely relevant to the sporadic disease.
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Evaluating the Impact of Human Amnion Epithelial Cells on Angiogenesis. Stem Cells Int 2015; 2016:4565612. [PMID: 26880964 PMCID: PMC4736214 DOI: 10.1155/2016/4565612] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Accepted: 09/29/2015] [Indexed: 01/24/2023] Open
Abstract
The effects of human amnion epithelial cells (hAECs) on angiogenesis remain controversial. It is yet unknown if the presence of inflammation and/or gestational age of hAEC donors have an impact on angiogenesis. In this study, we examined the differences between term and preterm hAECs on angiogenesis in vitro and in vivo. Conditioned media from term hAECs induced the formation of longer huVEC tubules on Matrigel. Both term and preterm hAECs expressed VEGFA, PDGFB, ANGPT1, and FOXC1, which significantly increased after TNFα and IFNγ stimulation. In the presence of TNFα and IFNγ, coculture with term hAECs reduced gene transcription of Tie-2 and Foxc1 in huVECs, while coculture with preterm hAECs increased gene transcription of PDGFRα and PDGFRβ and reduced gene transcription of FOXC1 in huVECs. In vivo assessment of angiogenesis using vWF immunostaining revealed that hAEC treatment decreased angiogenesis in a bleomycin model of lung fibrosis but increased angiogenesis in a neonatal model of hyperoxia-induced lung injury. In summary, our findings suggested that the impact of hAECs on angiogenesis may be influenced by the presence of inflammation and underlying pathology.
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49
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Reyahi A, Nik AM, Ghiami M, Gritli-Linde A, Pontén F, Johansson BR, Carlsson P. Foxf2 Is Required for Brain Pericyte Differentiation and Development and Maintenance of the Blood-Brain Barrier. Dev Cell 2015; 34:19-32. [PMID: 26120030 DOI: 10.1016/j.devcel.2015.05.008] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 02/09/2015] [Accepted: 05/12/2015] [Indexed: 11/29/2022]
Abstract
Pericytes are critical for cerebrovascular maturation and development of the blood-brain barrier (BBB), but their role in maintenance of the adult BBB, and how CNS pericytes differ from those of other tissues, is less well understood. We show that the forkhead transcription factor Foxf2 is specifically expressed in pericytes of the brain and that Foxf2(-/-) embryos develop intracranial hemorrhage, perivascular edema, thinning of the vascular basal lamina, an increase of luminal endothelial caveolae, and a leaky BBB. Foxf2(-/-) brain pericytes were more numerous, proliferated faster, and expressed significantly less Pdgfrβ. Tgfβ-Smad2/3 signaling was attenuated, whereas phosphorylation of Smad1/5 and p38 were enhanced. Tgfβ pathway components, including Tgfβ2, Tgfβr2, Alk5, and integrins αVβ8, were reduced. Foxf2 inactivation in adults resulted in BBB breakdown, endothelial thickening, and increased trans-endothelial vesicular transport. On the basis of these results, FOXF2 emerges as an interesting candidate locus for stroke susceptibility in humans.
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Affiliation(s)
- Azadeh Reyahi
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 405 30 Gothenburg, Sweden
| | - Ali M Nik
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 405 30 Gothenburg, Sweden
| | - Mozhgan Ghiami
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 405 30 Gothenburg, Sweden
| | - Amel Gritli-Linde
- Department of Oral Biochemistry, Sahlgrenska Academy, University of Gothenburg, Box 450, 405 30 Gothenburg, Sweden
| | - Fredrik Pontén
- Department of Immunology, Genetics and Pathology, Rudbecklaboratoriet, Uppsala University, 751 85 Uppsala, Sweden
| | - Bengt R Johansson
- Institute of Biomedicine, University of Gothenburg, Box 440, 405 30 Gothenburg, Sweden
| | - Peter Carlsson
- Department of Chemistry and Molecular Biology, University of Gothenburg, Box 462, 405 30 Gothenburg, Sweden.
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Abstract
Most stroke is multifactorial with multiple polygenic risk factors each conferring small increases in risk interacting with environmental risk factors, but it can also arise from mutations in a single gene. This review covers single-gene disorders which lead to stroke as a major phenotype, with a focus on those which cause cerebral small vessel disease (SVD), an area where there has been significant recent progress with findings that may inform us about the pathogenesis of SVD more broadly. We also discuss the impact that next generation sequencing technology (NGST) is likely to have on clinical practice in this area. The most common form of monogenic SVD is cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy, due to the mutations in the NOTCH3 gene. Several other inherited forms of SVD include cerebral autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy, retinal vasculopathy with cerebral leukodystrophy, collagen type IV α1 and α2 gene-related arteriopathy and FOXC1 deletion related arteriopathy. These monogenic forms of SVD, with overlapping clinical phenotypes, are beginning to provide insights into how the small arteries in the brain can be damaged and some of the mechanisms identified may also be relevant to more common sporadic SVD. Despite the discovery of these disorders, it is often challenging to clinically and radiologically distinguish between syndromes, while screening multiple genes for causative mutations that can be costly and time-consuming. The rapidly falling cost of NGST may allow quicker diagnosis of these rare causes of SVD, and can also identify previously unknown disease-causing variants.
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