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Bernard M, Menet R, Lecordier S, ElAli A. Endothelial PDGF-D contributes to neurovascular protection after ischemic stroke by rescuing pericyte functions. Cell Mol Life Sci 2024; 81:225. [PMID: 38769116 PMCID: PMC11106055 DOI: 10.1007/s00018-024-05244-w] [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: 11/28/2023] [Revised: 03/29/2024] [Accepted: 04/19/2024] [Indexed: 05/22/2024]
Abstract
Ischemic stroke induces neovascularization of the injured tissue as an attempt to promote structural repair and neurological recovery. Angiogenesis is regulated by pericytes that potently react to ischemic stroke stressors, ranging from death to dysfunction. Platelet-derived growth factor (PDGF) receptor (PDGFR)β controls pericyte survival, migration, and interaction with brain endothelial cells. PDGF-D a specific ligand of PDGFRβ is expressed in the brain, yet its regulation and role in ischemic stroke pathobiology remains unexplored. Using experimental ischemic stroke mouse model, we found that PDGF-D is transiently induced in brain endothelial cells at the injury site in the subacute phase. To investigate the biological significance of PDGF-D post-ischemic stroke regulation, its subacute expression was either downregulated using siRNA or upregulated using an active recombinant form. Attenuation of PDGF-D subacute induction exacerbates neuronal loss, impairs microvascular density, alters vascular permeability, and increases microvascular stalling. Increasing PDGF-D subacute bioavailability rescues neuronal survival and improves neurological recovery. PDGF-D subacute enhanced bioavailability promotes stable neovascularization of the injured tissue and improves brain perfusion. Notably, PDGF-D enhanced bioavailability improves pericyte association with brain endothelial cells. Cell-based assays using human brain pericyte and brain endothelial cells exposed to ischemia-like conditions were applied to investigate the underlying mechanisms. PDGF-D stimulation attenuates pericyte loss and fibrotic transition, while increasing the secretion of pro-angiogenic and vascular protective factors. Moreover, PDGF-D stimulates pericyte migration required for optimal endothelial coverage and promotes angiogenesis. Our study unravels new insights into PDGF-D contribution to neurovascular protection after ischemic stroke by rescuing the functions of pericytes.
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Affiliation(s)
- Maxime Bernard
- Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
- Neuroscience Axis, Research Center of CHU de Québec (CHUQ)-Université Laval, 2705 Laurier Boulevard, Quebec City, QC, G1V 4G2, Canada
| | - Romain Menet
- Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
- Neuroscience Axis, Research Center of CHU de Québec (CHUQ)-Université Laval, 2705 Laurier Boulevard, Quebec City, QC, G1V 4G2, Canada
| | - Sarah Lecordier
- Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
- Neuroscience Axis, Research Center of CHU de Québec (CHUQ)-Université Laval, 2705 Laurier Boulevard, Quebec City, QC, G1V 4G2, Canada
| | - Ayman ElAli
- Department of Psychiatry and Neuroscience, Faculty of Medicine, Université Laval, Quebec City, QC, Canada.
- Neuroscience Axis, Research Center of CHU de Québec (CHUQ)-Université Laval, 2705 Laurier Boulevard, Quebec City, QC, G1V 4G2, Canada.
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2
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Spinelli C, Adnani L, Meehan B, Montermini L, Huang S, Kim M, Nishimura T, Croul SE, Nakano I, Riazalhosseini Y, Rak J. Mesenchymal glioma stem cells trigger vasectasia-distinct neovascularization process stimulated by extracellular vesicles carrying EGFR. Nat Commun 2024; 15:2865. [PMID: 38570528 PMCID: PMC10991552 DOI: 10.1038/s41467-024-46597-x] [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: 05/05/2022] [Accepted: 03/04/2024] [Indexed: 04/05/2024] Open
Abstract
Targeting neovascularization in glioblastoma (GBM) is hampered by poor understanding of the underlying mechanisms and unclear linkages to tumour molecular landscapes. Here we report that different molecular subtypes of human glioma stem cells (GSC) trigger distinct endothelial responses involving either angiogenic or circumferential vascular growth (vasectasia). The latter process is selectively triggered by mesenchymal (but not proneural) GSCs and is mediated by a subset of extracellular vesicles (EVs) able to transfer EGFR/EGFRvIII transcript to endothelial cells. Inhibition of the expression and phosphorylation of EGFR in endothelial cells, either pharmacologically (Dacomitinib) or genetically (gene editing), abolishes their EV responses in vitro and disrupts vasectasia in vivo. Therapeutic inhibition of EGFR markedly extends anticancer effects of VEGF blockade in mice, coupled with abrogation of vasectasia and prolonged survival. Thus, vasectasia driven by intercellular transfer of oncogenic EGFR may represent a new therapeutic target in a subset of GBMs.
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Affiliation(s)
- Cristiana Spinelli
- McGill University, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Lata Adnani
- McGill University, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Brian Meehan
- McGill University, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Laura Montermini
- McGill University, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada
| | - Sidong Huang
- Department of Biochemistry, McGill University, Montreal, QC, Canada
- Rosalind & Morris Goodman Cancer Institute, McGill University, Montreal, QC, Canada
| | - Minjun Kim
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Tamiko Nishimura
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Sidney E Croul
- Department of Pathology & Laboratory Medicine, Dalhousie University, Halifax, NS, Canada
| | - Ichiro Nakano
- Department of Neurosurgery, Hokuto Social Medical Corporation, Hokuto Hospital, Kisen-7-5 Inadacho, Obihiro, Hokkaido, 080-0833, Japan
| | | | - Janusz Rak
- McGill University, The Research Institute of the McGill University Health Centre, Montreal, QC, Canada.
- Department of Biochemistry, McGill University, Montreal, QC, Canada.
- Department of Human Genetics, McGill University, Montreal, QC, Canada.
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3
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Todorov-Völgyi K, González-Gallego J, Müller SA, Beaufort N, Malik R, Schifferer M, Todorov MI, Crusius D, Robinson S, Schmidt A, Körbelin J, Bareyre F, Ertürk A, Haass C, Simons M, Paquet D, Lichtenthaler SF, Dichgans M. Proteomics of mouse brain endothelium uncovers dysregulation of vesicular transport pathways during aging. NATURE AGING 2024; 4:595-612. [PMID: 38519806 DOI: 10.1038/s43587-024-00598-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 02/20/2024] [Indexed: 03/25/2024]
Abstract
Age-related decline in brain endothelial cell (BEC) function contributes critically to neurological disease. Comprehensive atlases of the BEC transcriptome have become available, but results from proteomic profiling are lacking. To gain insights into endothelial pathways affected by aging, we developed a magnetic-activated cell sorting-based mouse BEC enrichment protocol compatible with proteomics and resolved the profiles of protein abundance changes during aging. Unsupervised cluster analysis revealed a segregation of age-related protein dynamics with biological functions, including a downregulation of vesicle-mediated transport. We found a dysregulation of key regulators of endocytosis and receptor recycling (most prominently Arf6), macropinocytosis and lysosomal degradation. In gene deletion and overexpression experiments, Arf6 affected endocytosis pathways in endothelial cells. Our approach uncovered changes not picked up by transcriptomic studies, such as accumulation of vesicle cargo and receptor ligands, including Apoe. Proteomic analysis of BECs from Apoe-deficient mice revealed a signature of accelerated aging. Our findings provide a resource for analysing BEC function during aging.
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Affiliation(s)
- Katalin Todorov-Völgyi
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany.
| | - Judit González-Gallego
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Graduate School of Systemic Neuroscience (GSN), University Hospital, LMU Munich, Munich, Germany
| | - Stephan A Müller
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Nathalie Beaufort
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Rainer Malik
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Martina Schifferer
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Mihail Ivilinov Todorov
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, Neuherberg, Germany
| | - Dennis Crusius
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | - Sophie Robinson
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Graduate School of Systemic Neuroscience (GSN), University Hospital, LMU Munich, Munich, Germany
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
| | - Andree Schmidt
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
| | - Jakob Körbelin
- Department of Oncology, Hematology and Bone Marrow Transplantation with Section Pneumology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Florence Bareyre
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Institute of Clinical Neuroimmunology, University Hospital, LMU Munich, Munich, Germany
- Biomedical Center Munich (BMC), Faculty of Medicine, LMU Munich, Planegg-Martinsried, Germany
| | - Ali Ertürk
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Institute for Tissue Engineering and Regenerative Medicine (iTERM), Helmholtz Zentrum München, Neuherberg, Germany
| | - Christian Haass
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
- Division of Metabolic Biochemistry, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Mikael Simons
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Dominik Paquet
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Stefan F Lichtenthaler
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany
- Neuroproteomics, School of Medicine and Health, Klinikum rechts der Isar, Technical University of Munich, Munich, Germany
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Martin Dichgans
- Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany.
- German Center for Neurodegenerative Diseases (DZNE) Munich, Munich, Germany.
- Munich Cluster for Systems Neurology (SyNergy), Munich, Germany.
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4
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Brown LS, King NE, Courtney JM, Gasperini RJ, Foa L, Howells DW, Sutherland BA. Brain pericytes in culture display diverse morphological and functional phenotypes. Cell Biol Toxicol 2023; 39:2999-3014. [PMID: 37322257 PMCID: PMC10693527 DOI: 10.1007/s10565-023-09814-9] [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: 11/18/2022] [Accepted: 05/23/2023] [Indexed: 06/17/2023]
Abstract
Pericytes play several important functions in the neurovascular unit including contractile control of capillaries, maintenance of the BBB, regulation of angiogenesis, and neuroinflammation. There exists a continuum of pericyte subtypes along the vascular tree which exhibit both morphological and transcriptomic differences. While different functions have been associated with the pericyte subtypes in vivo, numerous recent publications have used a primary human brain vascular pericytes (HBVP) cell line where this pericyte heterogeneity has not been considered. Here, we used primary HBVP cultures, high-definition imaging, cell motility tracking, and immunocytochemistry to characterise morphology, protein expression, and contractile behaviour to determine whether heterogeneity of pericytes also exists in cultures. We identified five distinct morphological subtypes that were defined using both qualitative criteria and quantitative shape analysis. The proportion of each subtype present within the culture changed as passage number increased, but pericytes did not change morphological subtype over short time periods. The rate and extent of cellular and membrane motility differed across the subtypes. Immunocytochemistry revealed differential expression of alpha-smooth muscle actin (αSMA) across subtypes. αSMA is essential for cell contractility, and consequently, only subtypes with high αSMA expression contracted in response to physiological vasoconstrictors endothelin-1 (ET1) and noradrenaline (NA). We conclude that there are distinct morphological subtypes in HBVP culture, which display different behaviours. This has significance for the use of HBVP when modelling pericyte physiology in vitro where relevance to in vivo pericyte subtypes along the vascular tree must be considered.
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Affiliation(s)
- Lachlan S Brown
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia
| | - Natalie E King
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia
| | - Jo-Maree Courtney
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia
| | - Robert J Gasperini
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia
| | - Lisa Foa
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia
- School of Psychological Sciences, College of Health and Medicine, University of Tasmania, Hobart, TAS, Australia
| | - David W Howells
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia
| | - Brad A Sutherland
- Tasmanian School of Medicine, College of Health and Medicine, University of Tasmania, Level 4 Medical Sciences Precinct, 17 Liverpool St, Hobart, TAS, 7000, Australia.
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5
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Wakid M, Almeida D, Aouabed Z, Rahimian R, Davoli MA, Yerko V, Leonova-Erko E, Richard V, Zahedi R, Borchers C, Turecki G, Mechawar N. Universal method for the isolation of microvessels from frozen brain tissue: A proof-of-concept multiomic investigation of the neurovasculature. Brain Behav Immun Health 2023; 34:100684. [PMID: 37822873 PMCID: PMC10562768 DOI: 10.1016/j.bbih.2023.100684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/29/2023] [Accepted: 09/06/2023] [Indexed: 10/13/2023] Open
Abstract
The neurovascular unit, comprised of vascular cell types that collectively regulate cerebral blood flow to meet the needs of coupled neurons, is paramount for the proper function of the central nervous system. The neurovascular unit gatekeeps blood-brain barrier properties, which experiences impairment in several central nervous system diseases associated with neuroinflammation and contributes to pathogenesis. To better understand function and dysfunction at the neurovascular unit and how it may confer inflammatory processes within the brain, isolation and characterization of the neurovascular unit is needed. Here, we describe a singular, standardized protocol to enrich and isolate microvessels from archived snap-frozen human and frozen mouse cerebral cortex using mechanical homogenization and centrifugation-separation that preserves the structural integrity and multicellular composition of microvessel fragments. For the first time, microvessels are isolated from postmortem ventromedial prefrontal cortex tissue and are comprehensively investigated as a structural unit using both RNA sequencing and Liquid Chromatography with tandem mass spectrometry (LC-MS/MS). Both the transcriptome and proteome are obtained and compared, demonstrating that the isolated brain microvessel is a robust model for the NVU and can be used to generate highly informative datasets in both physiological and disease contexts.
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Affiliation(s)
- Marina Wakid
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
- Integrated Program in Neuroscience, McGill University, Montréal, Quebec, Canada
| | - Daniel Almeida
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
- Integrated Program in Neuroscience, McGill University, Montréal, Quebec, Canada
| | - Zahia Aouabed
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
| | - Reza Rahimian
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
| | | | - Volodymyr Yerko
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
| | - Elena Leonova-Erko
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
| | - Vincent Richard
- Segal Cancer Proteomics Centre, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Quebec, Canada
| | - René Zahedi
- Segal Cancer Proteomics Centre, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Quebec, Canada
| | - Christoph Borchers
- Segal Cancer Proteomics Centre, Lady Davis Institute for Medical Research, Jewish General Hospital, McGill University, Montréal, Quebec, Canada
| | - Gustavo Turecki
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
- Integrated Program in Neuroscience, McGill University, Montréal, Quebec, Canada
- Department of Psychiatry, McGill University, Montréal, Quebec, Canada
| | - Naguib Mechawar
- McGill Group for Suicide Studies, Douglas Research Centre, Montréal, Quebec, Canada
- Integrated Program in Neuroscience, McGill University, Montréal, Quebec, Canada
- Department of Psychiatry, McGill University, Montréal, Quebec, Canada
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6
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Abstract
eNOS (endothelial nitric oxide synthase) is critically important enzyme responsible for regulation of cardiovascular homeostasis. Under physiological conditions, constitutive eNOS activity and production of endothelial nitric oxide (NO) exert essential neurovascular protective functions. In this review, we first discuss the roles of endothelial NO in prevention of neuronal amyloid accumulation and formation of neurofibrillary tangles, hallmarks of Alzheimer disease pathology. Next, we review existing evidence suggesting that NO released from endothelium prevents activation of microglia, stimulates glycolysis in astrocytes, and increases biogenesis of mitochondria. We also address major risk factors for cognitive impairment including aging and ApoE4 (apolipoprotein 4) genotype with focus on their detrimental effects on eNOS/NO signaling. Relevant to this review, recent studies suggested that aged eNOS heterozygous mice are unique model of spontaneous cerebral small vessel disease. In this regard, we review contribution of dysfunctional eNOS to deposition of Aβ (amyloid-β) into blood vessel wall leading to development of cerebral amyloid angiopathy. We conclude that endothelial dysfunction manifested by the loss of neurovascular protective functions of NO may significantly contribute to development of cognitive impairment.
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Affiliation(s)
- Zvonimir S. Katusic
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota 55902, USA
- Department of Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota 55902, USA
| | - Livius V. d’Uscio
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota 55902, USA
- Department of Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota 55902, USA
| | - Tongrong He
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Rochester, Minnesota 55902, USA
- Department of Pharmacology and Experimental Therapeutics, Mayo Clinic, Rochester, Minnesota 55902, USA
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7
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Jeffrey DA, Fontaine JT, Dabertrand F. Ex vivo capillary-parenchymal arteriole approach to study brain pericyte physiology. NEUROPHOTONICS 2022; 9:031919. [PMID: 36278784 PMCID: PMC9225307 DOI: 10.1117/1.nph.9.3.031919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 06/01/2022] [Indexed: 06/16/2023]
Abstract
Significance Vascular mural cells, defined as smooth muscle cells (SMCs) and pericytes, influence brain microcirculation, but how they contribute is not fully understood. Most approaches used to investigate pericyte and capillary interactions include ex vivo retinal/slice preparations or in vivo two-photon microscopy. However, neither method adequately captures mural cell behavior without interfering neuronal tissue. Thus, there is a need to isolate vessels with their respective mural cells to study functional and pathological changes. Aim The aim of our work was to implement an ex vivo method that recapitulates vessel dynamics in the brain. Approach Expanding upon our established ex vivo capillary-parenchymal arteriole (CaPA) preparation, we isolated and pressurized arteriole-capillary branches. Using Alexa Fluor™ 633 Hydrazide, we distinguished arterioles (containing elastin) versus capillaries (lacking elastin). In addition, our transgenic SMMHC-GCaMP6f mice allowed for us to visualize mural cell morphology andCa 2 + signals. Lastly, isolated microvasculature was cultured in DMEM media (up to 72 h), mounted, and pressurized using our CaPA preparation. Results U46619 induced a decrease in capillary lumen diameter using both a bath perfusion and local application. In addition, U46619 increasedCa 2 + signaling both globally and locally in contractile pericytes. In our SMMHC-GCaMP6f mice, we saw that thin strand pericytes had sparse processes while contractile pericytes had long, thick processes that wrapped around the lumen of the capillary. Fresh and cultured pericytes constricted in response to U46619 to the same level, and upstream arteriolar dilation induced by capillary stimulation with 10 mMK + remained unchanged by culture conditions adding another application of longer treatment to our approach. Conclusion Our ex vivo CaPA methodology facilitates observation of arteriolar SMC and pericyte dynamic changes in real-time without environmental factors. This method will help to better understand how mural cells differ based on microvasculature location.
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Affiliation(s)
- Danielle A. Jeffrey
- University of Colorado Anschutz Medical Campus, Department of Anesthesiology, Aurora, Colorado, United States
| | - Jackson T. Fontaine
- University of Colorado Anschutz Medical Campus, Department of Anesthesiology, Aurora, Colorado, United States
| | - Fabrice Dabertrand
- University of Colorado Anschutz Medical Campus, Department of Anesthesiology, Aurora, Colorado, United States
- University of Colorado Anschutz Medical Campus, Department of Pharmacology, Aurora, Colorado, United States
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8
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Marchetti L, Francisco D, Soldati S, Haghayegh Jahromi N, Barcos S, Gruber I, Pareja JR, Thiriot A, von Andrian U, Deutsch U, Lyck R, Bruggmann R, Engelhardt B. ACKR1 favors transcellular over paracellular T-cell diapedesis across the blood-brain barrier in neuroinflammation in vitro. Eur J Immunol 2022; 52:161-177. [PMID: 34524684 PMCID: PMC9293480 DOI: 10.1002/eji.202149238] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2021] [Revised: 08/11/2021] [Accepted: 09/13/2021] [Indexed: 12/14/2022]
Abstract
The migration of CD4+ effector/memory T cells across the blood-brain barrier (BBB) is a critical step in MS or its animal model, EAE. T-cell diapedesis across the BBB can occur paracellular, via the complex BBB tight junctions or transcellular via a pore through the brain endothelial cell body. Making use of primary mouse brain microvascular endothelial cells (pMBMECs) as in vitro model of the BBB, we here directly compared the transcriptome profile of pMBMECs favoring transcellular or paracellular T-cell diapedesis by RNA sequencing (RNA-seq). We identified the atypical chemokine receptor 1 (Ackr1) as one of the main candidate genes upregulated in pMBMECs favoring transcellular T-cell diapedesis. We confirmed upregulation of ACKR1 protein in pMBMECs promoting transcellular T-cell diapedesis and in venular endothelial cells in the CNS during EAE. Lack of endothelial ACKR1 reduced transcellular T-cell diapedesis across pMBMECs under physiological flow in vitro. Combining our previous observation that endothelial ACKR1 contributes to EAE pathogenesis by shuttling chemokines across the BBB, the present data support that ACKR1 mediated chemokine shuttling enhances transcellular T-cell diapedesis across the BBB during autoimmune neuroinflammation.
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Affiliation(s)
- Luca Marchetti
- Theodor Kocher InstituteUniversity of BernBernSwitzerland
| | - David Francisco
- Interfaculty Bioinformatics Unit and Swiss Institute of BioinformaticsUniversity of BernBernSwitzerland
| | - Sasha Soldati
- Theodor Kocher InstituteUniversity of BernBernSwitzerland
| | | | - Sara Barcos
- Theodor Kocher InstituteUniversity of BernBernSwitzerland
| | - Isabelle Gruber
- Theodor Kocher InstituteUniversity of BernBernSwitzerland
- present address: Department of Oncology, Lausanne University HospitalUniversity of LausanneLausanneSwitzerland
| | | | - Aude Thiriot
- Department of Immunology and Center for Immune ImagingHarvard Medical SchoolBostonMassachusettsUSA
- The Ragon Institute of MGH, MIT and HarvardCambridgeMassachusettsUSA
| | - Ulrich von Andrian
- Department of Immunology and Center for Immune ImagingHarvard Medical SchoolBostonMassachusettsUSA
- The Ragon Institute of MGH, MIT and HarvardCambridgeMassachusettsUSA
| | - Urban Deutsch
- Theodor Kocher InstituteUniversity of BernBernSwitzerland
| | - Ruth Lyck
- Theodor Kocher InstituteUniversity of BernBernSwitzerland
| | - Rémy Bruggmann
- Interfaculty Bioinformatics Unit and Swiss Institute of BioinformaticsUniversity of BernBernSwitzerland
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9
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Steeg PS. The blood-tumour barrier in cancer biology and therapy. Nat Rev Clin Oncol 2021; 18:696-714. [PMID: 34253912 DOI: 10.1038/s41571-021-00529-6] [Citation(s) in RCA: 110] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/21/2021] [Indexed: 02/06/2023]
Abstract
The protective blood-brain barrier has a major role in ensuring normal brain function by severely limiting and tightly controlling the ingress of substances into the brain from the circulation. In primary brain tumours, such as glioblastomas, as well as in brain metastases from cancers in other organs, including lung and breast cancers and melanoma, the blood-brain barrier is modified and is referred to as the blood-tumour barrier (BTB). Alterations in the BTB affect its permeability, and this structure participates in reciprocal regulatory pathways with tumour cells. Importantly, the BTB typically retains a heterogeneous capacity to restrict the penetration of many therapeutic agents into intracranial tumours, and overcoming this challenge is a key to improving the effectiveness of treatment and patient quality of life. Herein, current knowledge of BTB structure and function is reviewed from a cell and cancer biology standpoint, with a focus on findings derived from in vivo models and human tumour specimens. Additionally, how this knowledge can be translated into clinical advances for patients with cancer is discussed.
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Affiliation(s)
- Patricia S Steeg
- Women's Malignancies Branch, Center for Cancer Research, National Cancer Institute, Bethesda, MD, USA.
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10
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Bulut GB, Alencar GF, Owsiany KM, Nguyen AT, Karnewar S, Haskins RM, Waller LK, Cherepanova OA, Deaton RA, Shankman LS, Keller SR, Owens GK. KLF4 (Kruppel-Like Factor 4)-Dependent Perivascular Plasticity Contributes to Adipose Tissue inflammation. Arterioscler Thromb Vasc Biol 2021; 41:284-301. [PMID: 33054397 PMCID: PMC7769966 DOI: 10.1161/atvbaha.120.314703] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Smooth muscle cells and pericytes display remarkable plasticity during injury and disease progression. Here, we tested the hypothesis that perivascular cells give rise to Klf4-dependent macrophage-like cells that augment adipose tissue (AT) inflammation and metabolic dysfunction associated with diet-induced obesity (DIO). Approach and Results: Using Myh11-CreERT2 eYFP (enhanced yellow fluorescent protein) mice and flow cytometry of the stromovascular fraction of epididymal AT, we observed a large fraction of smooth muscle cells and pericytes lineage traced eYFP+ cells expressing macrophage markers. Subsequent single-cell RNA sequencing, however, showed that the majority of these cells had no detectable eYFP transcript. Further exploration revealed that intraperitoneal injection of tamoxifen in peanut oil, used for generating conditional knockout or reporter mice in thousands of previous studies, resulted in large increase in the autofluorescence and false identification of macrophages within epididymal AT as being eYFP+; and unintended proinflammatory consequences. Using newly generated Myh11-DreERT2tdTomato mice given oral tamoxifen, we virtually eliminated the problem with autofluorescence and identified 8 perivascular cell dominated clusters, half of which were altered upon DIO. Given that perivascular cell KLF4 (kruppel-like factor 4) can have beneficial or detrimental effects, we tested its role in obesity-associated AT inflammation. While smooth muscle cells and pericytes-specific Klf4 knockout (smooth muscle cells and pericytes Klf4Δ/Δ) mice were not protected from DIO, they displayed improved glucose tolerance upon DIO, and showed marked decreases in proinflammatory macrophages and increases in LYVE1+ lymphatic endothelial cells in the epididymal AT. CONCLUSIONS Perivascular cells within the AT microvasculature dynamically respond to DIO and modulate tissue inflammation and metabolism in a KLF4-dependent manner.
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Affiliation(s)
- Gamze B. Bulut
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Gabriel F. Alencar
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | | | - Anh T. Nguyen
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Santosh Karnewar
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Ryan M. Haskins
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Lillian K. Waller
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Olga A. Cherepanova
- Cardiovascular and Metabolic Sciences Lerner Research Institute, Cleveland Clinic
| | - Rebecca A. Deaton
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Laura S. Shankman
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
| | - Susanna R. Keller
- Department of Medicine-Division of Endocrinology and Metabolism, University of Virginia
| | - Gary K. Owens
- The Robert M. Berne Cardiovascular Research Center, University of Virginia
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11
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Zhang W, Liu QY, Haqqani AS, Leclerc S, Liu Z, Fauteux F, Baumann E, Delaney CE, Ly D, Star AT, Brunette E, Sodja C, Hewitt M, Sandhu JK, Stanimirovic DB. Differential expression of receptors mediating receptor-mediated transcytosis (RMT) in brain microvessels, brain parenchyma and peripheral tissues of the mouse and the human. Fluids Barriers CNS 2020; 17:47. [PMID: 32698806 PMCID: PMC7376922 DOI: 10.1186/s12987-020-00209-0] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Accepted: 07/13/2020] [Indexed: 12/04/2022] Open
Abstract
Receptor-mediated transcytosis (RMT) is a principal pathway for transport of macromolecules essential for brain function across the blood–brain barrier (BBB). Antibodies or peptide ligands which bind RMT receptors are often co-opted for brain delivery of biotherapeutics. Constitutively recycling transferrin receptor (TfR) is a prototype receptor utilized to shuttle therapeutic cargos across the BBB. Several other BBB-expressed receptors have been shown to mediate transcytosis of antibodies or protein ligands including insulin receptor (INSR) and insulin-like growth factor-1 receptor (IGF1R), lipid transporters LRP1, LDLR, LRP8 and TMEM30A, solute carrier family transporter SLC3A2/CD98hc and leptin receptor (LEPR). In this study, we analyzed expression patterns of genes encoding RMT receptors in isolated brain microvessels, brain parenchyma and peripheral organs of the mouse and the human using RNA-seq approach. IGF1R, INSR and LRP8 were highly enriched in mouse brain microvessels compared to peripheral tissues. In human brain microvessels only INSR was enriched compared to either the brain or the lung. The expression levels of SLC2A1, LRP1, IGF1R, LRP8 and TFRC were significantly higher in the mouse compared to human brain microvessels. The protein expression of these receptors analyzed by Western blot and immunofluorescent staining of the brain microvessels correlated with their transcript abundance. This study provides a molecular transcriptomics map of key RMT receptors in mouse and human brain microvessels and peripheral tissues, important to translational studies of biodistribution, efficacy and safety of antibodies developed against these receptors.
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Affiliation(s)
- Wandong Zhang
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada.
| | - Qing Yan Liu
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Arsalan S Haqqani
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Sonia Leclerc
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Ziying Liu
- Scientific Data Mining/Digital Technology Research Centre, National Research Council of Canada, Ottawa, Canada
| | - François Fauteux
- Scientific Data Mining/Digital Technology Research Centre, National Research Council of Canada, Ottawa, Canada
| | - Ewa Baumann
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Christie E Delaney
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Dao Ly
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Alexandra T Star
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Eric Brunette
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Caroline Sodja
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Melissa Hewitt
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Jagdeep K Sandhu
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada
| | - Danica B Stanimirovic
- Human Health Therapeutics Research Centre, National Research Council of Canada, 1200 Montreal Road, M54, Ottawa, ON, K1A0R6, Canada.
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12
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Corada M, Orsenigo F, Bhat GP, Conze LL, Breviario F, Cunha SI, Claesson-Welsh L, Beznoussenko GV, Mironov AA, Bacigaluppi M, Martino G, Pitulescu ME, Adams RH, Magnusson P, Dejana E. Fine-Tuning of Sox17 and Canonical Wnt Coordinates the Permeability Properties of the Blood-Brain Barrier. Circ Res 2019; 124:511-525. [PMID: 30591003 PMCID: PMC6407809 DOI: 10.1161/circresaha.118.313316] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Supplemental Digital Content is available in the text. Rationale: The microvasculature of the central nervous system includes the blood-brain barrier (BBB), which regulates the permeability to nutrients and restricts the passage of toxic agents and inflammatory cells. Canonical Wnt/β-catenin signaling is responsible for the early phases of brain vascularization and BBB differentiation. However, this signal declines after birth, and other signaling pathways able to maintain barrier integrity at postnatal stage are still unknown. Objective: Sox17 (SRY [sex-determining region Y]-box 17) constitutes a major downstream target of Wnt/β-catenin in endothelial cells and regulates arterial differentiation. In the present article, we asked whether Sox17 may act downstream of Wnt/β-catenin in inducing BBB differentiation and maintenance. Methods and Results: Using reporter mice and nuclear staining of Sox17 and β-catenin, we report that although β-catenin signaling declines after birth, Sox17 activation increases and remains high in the adult. Endothelial-specific inactivation of Sox17 leads to increase of permeability of the brain microcirculation. The severity of this effect depends on the degree of BBB maturation: it is strong in the embryo and progressively declines after birth. In search of Sox17 mechanism of action, RNA sequencing analysis of gene expression of brain endothelial cells has identified members of the Wnt/β-catenin signaling pathway as downstream targets of Sox17. Consistently, we found that Sox17 is a positive inducer of Wnt/β-catenin signaling, and it acts in concert with this pathway to induce and maintain BBB properties. In vivo, inhibition of the β-catenin destruction complex or expression of a degradation-resistant β-catenin mutant, prevent the increase in permeability and retina vascular malformations observed in the absence of Sox17. Conclusions: Our data highlight a novel role for Sox17 in the induction and maintenance of the BBB, and they underline the strict reciprocal tuning of this transcription factor and Wnt/β-catenin pathway. Modulation of Sox17 activity may be relevant to control BBB permeability in pathological conditions.
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Affiliation(s)
- Monica Corada
- From the FIRC Institute of Molecular Oncology Foundation (IFOM), Milan, Italy (M.C., F.O., F.B., G.V.B., A.A.M., E.D.)
| | - Fabrizio Orsenigo
- From the FIRC Institute of Molecular Oncology Foundation (IFOM), Milan, Italy (M.C., F.O., F.B., G.V.B., A.A.M., E.D.)
| | - Ganesh Parameshwar Bhat
- Molecular Neurobiology Laboratory, Division of Neuroscience (G.P.B.), San Raffaele Hospital, Milan, Italy
| | - Lei Liu Conze
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Sweden (L.L.C., S.I.C., L.C.-W., P.M., E.D.)
| | - Ferruccio Breviario
- From the FIRC Institute of Molecular Oncology Foundation (IFOM), Milan, Italy (M.C., F.O., F.B., G.V.B., A.A.M., E.D.)
| | - Sara Isabel Cunha
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Sweden (L.L.C., S.I.C., L.C.-W., P.M., E.D.)
| | - Lena Claesson-Welsh
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Sweden (L.L.C., S.I.C., L.C.-W., P.M., E.D.)
| | - Galina V Beznoussenko
- From the FIRC Institute of Molecular Oncology Foundation (IFOM), Milan, Italy (M.C., F.O., F.B., G.V.B., A.A.M., E.D.)
| | - Alexander A Mironov
- From the FIRC Institute of Molecular Oncology Foundation (IFOM), Milan, Italy (M.C., F.O., F.B., G.V.B., A.A.M., E.D.)
| | - Marco Bacigaluppi
- Neuroimmunology Unit, Division of Neuroscience, Institute of Experimental Neurology (M.B., G.M.), San Raffaele Hospital, Milan, Italy
| | - Gianvito Martino
- Neuroimmunology Unit, Division of Neuroscience, Institute of Experimental Neurology (M.B., G.M.), San Raffaele Hospital, Milan, Italy
| | - Mara E Pitulescu
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and Faculty of Medicine, University of Münster, Germany (M.E.P., R.H.A.)
| | - Ralf H Adams
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine and Faculty of Medicine, University of Münster, Germany (M.E.P., R.H.A.)
| | - Peetra Magnusson
- Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Sweden (L.L.C., S.I.C., L.C.-W., P.M., E.D.)
| | - Elisabetta Dejana
- From the FIRC Institute of Molecular Oncology Foundation (IFOM), Milan, Italy (M.C., F.O., F.B., G.V.B., A.A.M., E.D.).,Rudbeck Laboratory, Department of Immunology, Genetics and Pathology, Uppsala University, Sweden (L.L.C., S.I.C., L.C.-W., P.M., E.D.).,Department of Oncology and Hemato-Oncology, University of Milan, Italy (E.D.)
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13
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O'Brown NM, Megason SG, Gu C. Suppression of transcytosis regulates zebrafish blood-brain barrier function. eLife 2019; 8:e47326. [PMID: 31429822 PMCID: PMC6726461 DOI: 10.7554/elife.47326] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Accepted: 08/19/2019] [Indexed: 12/15/2022] Open
Abstract
As an optically transparent model organism with an endothelial blood-brain barrier (BBB), zebrafish offer a powerful tool to study the vertebrate BBB. However, the precise developmental profile of functional zebrafish BBB acquisition and the subcellular and molecular mechanisms governing the zebrafish BBB remain poorly characterized. Here, we capture the dynamics of developmental BBB leakage using live imaging, revealing a combination of steady accumulation in the parenchyma and sporadic bursts of tracer leakage. Electron microscopy studies further reveal high levels of transcytosis in brain endothelium early in development that are suppressed later. The timing of this suppression of transcytosis coincides with the establishment of BBB function. Finally, we demonstrate a key mammalian BBB regulator Mfsd2a, which inhibits transcytosis, plays a conserved role in zebrafish, as mfsd2aa mutants display increased BBB permeability due to increased transcytosis. Our findings indicate a conserved developmental program of barrier acquisition between zebrafish and mice.
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Affiliation(s)
| | - Sean G Megason
- Department of Systems BiologyHarvard Medical SchoolBostonUnited States
| | - Chenghua Gu
- Department of NeurobiologyHarvard Medical SchoolBostonUnited States
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14
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Quiñonez-Silvero C, Hübner K, Herzog W. Development of the brain vasculature and the blood-brain barrier in zebrafish. Dev Biol 2019; 457:181-190. [PMID: 30862465 DOI: 10.1016/j.ydbio.2019.03.005] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/06/2019] [Accepted: 03/08/2019] [Indexed: 12/13/2022]
Abstract
To ensure tissue homeostasis the brain needs to be protected from blood-derived fluctuations or pathogens that could affect its function. Therefore, the brain capillaries develop tissue-specific properties to form a selective blood-brain barrier (BBB), allowing the passage of essential molecules to the brain and blocking the penetration of potentially harmful compounds or cells. Previous studies reported the presence of this barrier in zebrafish. The intrinsic features of the zebrafish embryos and larvae in combination with optical techniques, make them suitable for the study of barrier establishment and maturation. In this review, we discuss the most recent contributions to the development and formation of a functional zebrafish BBB. Moreover, we compare the molecular and cellular characteristic of the zebrafish and the mammalian BBB.
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Affiliation(s)
- Claudia Quiñonez-Silvero
- University of Muenster, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Germany
| | - Kathleen Hübner
- University of Muenster, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Germany
| | - Wiebke Herzog
- University of Muenster, Muenster, Germany; Cells-in-Motion Cluster of Excellence (EXC 1003 - CiM), University of Muenster, Germany; Max Planck Institute for Molecular Biomedicine, Muenster, Germany.
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15
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Abstract
Multiple sclerosis (MS) is an autoimmune inflammatory demyelinating disease that affects the central nervous system (CNS), particularly, in young adults. Current MS treatments aim to reduce demyelination; however, these have limited efficacy, display side effects and lack of regenerative activities. Oligodendrocyte progenitor cells (OPCs) represents the major source for new myelin. Upon demyelination, OPCs get activated, proliferate, migrate towards the lesion, and differentiate into remyelinating oligodendrocytes. Although myelin repair (remyelination) represents a robust response to myelin damage, during MS, this regenerative phenomenon decays in efficiency or even fails. CNS-resident pericytes (CNS-PCs) are essential for vascular homeostasis regulating blood-brain barrier (BBB) permeability and stability as well as endothelial cells (ECs) function during angiogenesis and neovascularization. Recent studies indicate that CNS-PCs also play a crucial role regulating OPC function during remyelination, and very importantly, these cells are substantially affected in MS. This chapter summarizes important aspects of MS and CNS remyelination as well as it provides new insights supporting the contribution of CNS-PCs to myelin regeneration and to MS pathology. Currently, there is evidence arguing in favor of CNS-PCs as novel therapeutic targets for the development of future treatments for MS.
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