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Radke J, Meinhardt J, Aschman T, Chua RL, Farztdinov V, Lukassen S, Ten FW, Friebel E, Ishaque N, Franz J, Huhle VH, Mothes R, Peters K, Thomas C, Schneeberger S, Schumann E, Kawelke L, Jünger J, Horst V, Streit S, von Manitius R, Körtvélyessy P, Vielhaber S, Reinhold D, Hauser AE, Osterloh A, Enghard P, Ihlow J, Elezkurtaj S, Horst D, Kurth F, Müller MA, Gassen NC, Melchert J, Jechow K, Timmermann B, Fernandez-Zapata C, Böttcher C, Stenzel W, Krüger E, Landthaler M, Wyler E, Corman V, Stadelmann C, Ralser M, Eils R, Heppner FL, Mülleder M, Conrad C, Radbruch H. Proteomic and transcriptomic profiling of brainstem, cerebellum and olfactory tissues in early- and late-phase COVID-19. Nat Neurosci 2024; 27:409-420. [PMID: 38366144 DOI: 10.1038/s41593-024-01573-y] [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: 06/20/2023] [Accepted: 01/08/2024] [Indexed: 02/18/2024]
Abstract
Neurological symptoms, including cognitive impairment and fatigue, can occur in both the acute infection phase of coronavirus disease 2019 (COVID-19) and at later stages, yet the mechanisms that contribute to this remain unclear. Here we profiled single-nucleus transcriptomes and proteomes of brainstem tissue from deceased individuals at various stages of COVID-19. We detected an inflammatory type I interferon response in acute COVID-19 cases, which resolves in the late disease phase. Integrating single-nucleus RNA sequencing and spatial transcriptomics, we could localize two patterns of reaction to severe systemic inflammation, one neuronal with a direct focus on cranial nerve nuclei and a separate diffuse pattern affecting the whole brainstem. The latter reflects a bystander effect of the respiratory infection that spreads throughout the vascular unit and alters the transcriptional state of mainly oligodendrocytes, microglia and astrocytes, while alterations of the brainstem nuclei could reflect the connection of the immune system and the central nervous system via, for example, the vagus nerve. Our results indicate that even without persistence of severe acute respiratory syndrome coronavirus 2 in the central nervous system, local immune reactions are prevailing, potentially causing functional disturbances that contribute to neurological complications of COVID-19.
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Affiliation(s)
- Josefine Radke
- Institute of Pathology, Universitätsmedizin Greifswald, Greifswald, Germany.
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
| | - Jenny Meinhardt
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Tom Aschman
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Robert Lorenz Chua
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Vadim Farztdinov
- Core Facility High Throughput Mass Spectrometry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Sören Lukassen
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Foo Wei Ten
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Ekaterina Friebel
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Naveed Ishaque
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jonas Franz
- Department of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Valerie Helena Huhle
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Ronja Mothes
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Kristin Peters
- Institute of Pathology, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Carolina Thomas
- Department of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Shirin Schneeberger
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Elisa Schumann
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Leona Kawelke
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Julia Jünger
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Viktor Horst
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Simon Streit
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Regina von Manitius
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Péter Körtvélyessy
- Department of Neurology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Stefan Vielhaber
- Department of Neurology, Otto von Guerike University Magdeburg, Magdeburg, Germany
| | - Dirk Reinhold
- Institute of Molecular and Clinical Immunology, Otto von Guerike University Magdeburg, Magdeburg, Germany
| | - Anja E Hauser
- Department of Rheumatology and Clinical Immunology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- Immune Dynamics, Deutsches Rheuma-Forschungszentrum, a Leibniz Institute, Berlin, Germany
| | - Anja Osterloh
- Department of Pathology, University Medical Center Ulm, Ulm, Germany
| | - Philipp Enghard
- Department of Nephrology and Medical Intensive Care, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jana Ihlow
- Department of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Sefer Elezkurtaj
- Department of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - David Horst
- Department of Pathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Florian Kurth
- Department of Infectious Diseases and Respiratory Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Marcel A Müller
- Institute of Virology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Nils C Gassen
- Department of Psychiatry and Psychotherapy, University Hospital Bonn, Bonn, Germany
| | - Julia Melchert
- Institute of Virology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Katharina Jechow
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | | | - Camila Fernandez-Zapata
- Experimental and Clinical Research Center, a cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Chotima Böttcher
- Experimental and Clinical Research Center, a cooperation between the Max Delbrück Center for Molecular Medicine in the Helmholtz Association and Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Werner Stenzel
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Elke Krüger
- Institute of Medical Biochemistry and Molecular Biology, Universitätsmedizin Greifswald, Greifswald, Germany
| | - Markus Landthaler
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
- Institut für Biologie, Humboldt Universität, Berlin, Germany
| | - Emanuel Wyler
- Max Delbrück Center for Molecular Medicine in the Helmholtz Association, Berlin, Germany
| | - Victor Corman
- Department of Infectious Diseases and Respiratory Medicine, Charité - Universitätsmedizin Berlin, Berlin, Germany
- German Centre for Infection Research (DZIF), associated partner, Berlin, Germany
| | - Christine Stadelmann
- Department of Neuropathology, University Medical Center Göttingen, Göttingen, Germany
| | - Markus Ralser
- Core Facility High Throughput Mass Spectrometry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Roland Eils
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Frank L Heppner
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany
- German Center for Neurodegenerative Diseases (DZNE) Berlin, Berlin, Germany
- Cluster of Excellence NeuroCure, Berlin, Germany
- German Cancer Consortium (DKTK), Partner Site Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Michael Mülleder
- Core Facility High Throughput Mass Spectrometry, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Christian Conrad
- Center of Digital Health, Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Helena Radbruch
- Department of Neuropathology, Charité - Universitätsmedizin Berlin, Berlin, Germany.
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Martins S, Coletti R, Lopes MB. Disclosing transcriptomics network-based signatures of glioma heterogeneity using sparse methods. BioData Min 2023; 16:26. [PMID: 37752578 PMCID: PMC10523751 DOI: 10.1186/s13040-023-00341-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Accepted: 08/13/2023] [Indexed: 09/28/2023] Open
Abstract
Gliomas are primary malignant brain tumors with poor survival and high resistance to available treatments. Improving the molecular understanding of glioma and disclosing novel biomarkers of tumor development and progression could help to find novel targeted therapies for this type of cancer. Public databases such as The Cancer Genome Atlas (TCGA) provide an invaluable source of molecular information on cancer tissues. Machine learning tools show promise in dealing with the high dimension of omics data and extracting relevant information from it. In this work, network inference and clustering methods, namely Joint Graphical lasso and Robust Sparse K-means Clustering, were applied to RNA-sequencing data from TCGA glioma patients to identify shared and distinct gene networks among different types of glioma (glioblastoma, astrocytoma, and oligodendroglioma) and disclose new patient groups and the relevant genes behind groups' separation. The results obtained suggest that astrocytoma and oligodendroglioma have more similarities compared with glioblastoma, highlighting the molecular differences between glioblastoma and the others glioma subtypes. After a comprehensive literature search on the relevant genes pointed our from our analysis, we identified potential candidates for biomarkers of glioma. Further molecular validation of these genes is encouraged to understand their potential role in diagnosis and in the design of novel therapies.
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Affiliation(s)
- Sofia Martins
- NOVA School of Science and Technology, NOVA University of Lisbon, Caparica, 2829-516, Portugal
| | - Roberta Coletti
- Center for Mathematics and Applications (NOVA Math), NOVA School of Science and Technology, Caparica, 2829-516, Portugal.
| | - Marta B Lopes
- NOVA School of Science and Technology, NOVA University of Lisbon, Caparica, 2829-516, Portugal.
- Center for Mathematics and Applications (NOVA Math), NOVA School of Science and Technology, Caparica, 2829-516, Portugal.
- NOVA Laboratory for Computer Science and Informatics (NOVA LINCS), NOVA School of Science and Technology, Caparica, 2829-516, Portugal.
- UNIDEMI, Department of Mechanical and Industrial Engineering, NOVA School of Science and Technology, Caparica, 2829-516, Portugal.
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3
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Brivio E, Kos A, Ulivi AF, Karamihalev S, Ressle A, Stoffel R, Hirsch D, Stelzer G, Schmidt MV, Lopez JP, Chen A. Sex shapes cell-type-specific transcriptional signatures of stress exposure in the mouse hypothalamus. Cell Rep 2023; 42:112874. [PMID: 37516966 DOI: 10.1016/j.celrep.2023.112874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 05/19/2023] [Accepted: 07/11/2023] [Indexed: 08/01/2023] Open
Abstract
Stress-related psychiatric disorders and the stress system show prominent differences between males and females, as well as strongly divergent transcriptional changes. Despite several proposed mechanisms, we still lack the understanding of the molecular processes at play. Here, we explore the contribution of cell types to transcriptional sex dimorphism using single-cell RNA sequencing. We identify cell-type-specific signatures of acute restraint stress in the paraventricular nucleus of the hypothalamus, a central hub of the stress response, in male and female mice. Further, we show that a history of chronic mild stress alters these signatures in a sex-specific way, and we identify oligodendrocytes as a major target for these sex-specific effects. This dataset, which we provide as an online interactive app, offers the transcriptomes of thousands of individual cells as a molecular resource for an in-depth dissection of the interplay between cell types and sex on the mechanisms of the stress response.
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Affiliation(s)
- Elena Brivio
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany; International Max Planck Research School for Translational Psychiatry (IMPRS-TP), 80804 Munich, Germany; Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Brain Sciences, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Aron Kos
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany
| | | | - Stoyo Karamihalev
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany; International Max Planck Research School for Translational Psychiatry (IMPRS-TP), 80804 Munich, Germany
| | - Andrea Ressle
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany
| | - Rainer Stoffel
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany
| | - Dana Hirsch
- Department of Veterinary Resources, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Gil Stelzer
- Bioinformatics Unit, Department of Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot 76100, Israel
| | - Mathias V Schmidt
- Research Group Neurobiology of Stress Resilience, Max Planck Institute of Psychiatry, 80804 Munich, Germany
| | - Juan Pablo Lopez
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany; Department of Neuroscience, Karolinska Institutet, 171 77 Stockholm, Sweden.
| | - Alon Chen
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, 80804 Munich, Germany; Department of Molecular Neuroscience, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Brain Sciences, Weizmann Institute of Science, Rehovot 76100, Israel.
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4
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Jin K, Yao Z, van Velthoven CTJ, Kaplan ES, Glattfelder K, Barlow ST, Boyer G, Carey D, Casper T, Chakka AB, Chakrabarty R, Clark M, Departee M, Desierto M, Gary A, Gloe J, Goldy J, Guilford N, Guzman J, Hirschstein D, Lee C, Liang E, Pham T, Reding M, Ronellenfitch K, Ruiz A, Sevigny J, Shapovalova N, Shulga L, Sulc J, Torkelson A, Tung H, Levi B, Sunkin SM, Dee N, Esposito L, Smith K, Tasic B, Zeng H. Cell-type specific molecular signatures of aging revealed in a brain-wide transcriptomic cell-type atlas. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.26.550355. [PMID: 38168182 PMCID: PMC10760145 DOI: 10.1101/2023.07.26.550355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Biological aging can be defined as a gradual loss of homeostasis across various aspects of molecular and cellular function. Aging is a complex and dynamic process which influences distinct cell types in a myriad of ways. The cellular architecture of the mammalian brain is heterogeneous and diverse, making it challenging to identify precise areas and cell types of the brain that are more susceptible to aging than others. Here, we present a high-resolution single-cell RNA sequencing dataset containing ~1.2 million high-quality single-cell transcriptomic profiles of brain cells from young adult and aged mice across both sexes, including areas spanning the forebrain, midbrain, and hindbrain. We find age-associated gene expression signatures across nearly all 130+ neuronal and non-neuronal cell subclasses we identified. We detect the greatest gene expression changes in non-neuronal cell types, suggesting that different cell types in the brain vary in their susceptibility to aging. We identify specific, age-enriched clusters within specific glial, vascular, and immune cell types from both cortical and subcortical regions of the brain, and specific gene expression changes associated with cell senescence, inflammation, decrease in new myelination, and decreased vasculature integrity. We also identify genes with expression changes across multiple cell subclasses, pointing to certain mechanisms of aging that may occur across wide regions or broad cell types of the brain. Finally, we discover the greatest gene expression changes in cell types localized to the third ventricle of the hypothalamus, including tanycytes, ependymal cells, and Tbx3+ neurons found in the arcuate nucleus that are part of the neuronal circuits regulating food intake and energy homeostasis. These findings suggest that the area surrounding the third ventricle in the hypothalamus may be a hub for aging in the mouse brain. Overall, we reveal a dynamic landscape of cell-type-specific transcriptomic changes in the brain associated with normal aging that will serve as a foundation for the investigation of functional changes in the aging process and the interaction of aging and diseases.
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Affiliation(s)
- Kelly Jin
- Allen Institute for Brain Science, Seattle, WA, USA
| | - Zizhen Yao
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | | | | | | | | | - Daniel Carey
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | | | | | | | - Max Departee
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | - Amanda Gary
- Allen Institute for Brain Science, Seattle, WA, USA
| | - Jessica Gloe
- Allen Institute for Brain Science, Seattle, WA, USA
| | - Jeff Goldy
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | | | | | - Changkyu Lee
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | | | | | | | | | - Josh Sevigny
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | | | - Josef Sulc
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | - Herman Tung
- Allen Institute for Brain Science, Seattle, WA, USA
| | - Boaz Levi
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | - Nick Dee
- Allen Institute for Brain Science, Seattle, WA, USA
| | | | | | | | - Hongkui Zeng
- Allen Institute for Brain Science, Seattle, WA, USA
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5
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Dominicis A, Del Giovane A, Torreggiani M, Recchia AD, Ciccarone F, Ciriolo MR, Ragnini-Wilson A. N-Acetylaspartate Drives Oligodendroglial Differentiation via Histone Deacetylase Activation. Cells 2023; 12:1861. [PMID: 37508525 PMCID: PMC10378218 DOI: 10.3390/cells12141861] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/09/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
An unmet clinical goal in demyelinating pathologies is to restore the myelin sheath prior to neural degeneration. N-acetylaspartate (NAA) is an acetylated derivative form of aspartate, abundant in the healthy brain but severely reduced during traumatic brain injury and in patients with neurodegenerative pathologies. How extracellular NAA variations impact the remyelination process and, thereby, the ability of oligodendrocytes to remyelinate axons remains unexplored. Here, we evaluated the remyelination properties of the oligodendroglial (OL) mouse cell line Oli-neuM under different concentrations of NAA using a combination of biochemical, qPCR, immunofluorescence assays, and in vitro engagement tests, at NAA doses compatible with those observed in healthy brains and during brain injury. We observed that oligodendroglia cells respond to decreasing levels of NAA by stimulating differentiation and promoting gene expression of myelin proteins in a temporally regulated manner. Low doses of NAA potently stimulate Oli-neuM to engage with synthetic axons. Furthermore, we show a concentration-dependent expression of specific histone deacetylases essential for MBP gene expression under NAA or Clobetasol treatment. These data are consistent with the idea that oligodendrocytes respond to lowering the NAA concentration by activating the remyelination process via deacetylase activation.
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Affiliation(s)
| | - Alice Del Giovane
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | - Matteo Torreggiani
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
| | | | - Fabio Ciccarone
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
- IRCCS San Raffaele, 00166 Rome, Italy
| | - Maria Rosa Ciriolo
- Department of Biology, University of Rome Tor Vergata, 00133 Rome, Italy
- IRCCS San Raffaele, 00166 Rome, Italy
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6
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Huang H, He W, Tang T, Qiu M. Immunological Markers for Central Nervous System Glia. Neurosci Bull 2022; 39:379-392. [PMID: 36028641 PMCID: PMC10043115 DOI: 10.1007/s12264-022-00938-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 06/09/2022] [Indexed: 10/15/2022] Open
Abstract
Glial cells in the central nervous system (CNS) are composed of oligodendrocytes, astrocytes and microglia. They contribute more than half of the total cells of the CNS, and are essential for neural development and functioning. Studies on the fate specification, differentiation, and functional diversification of glial cells mainly rely on the proper use of cell- or stage-specific molecular markers. However, as cellular markers often exhibit different specificity and sensitivity, careful consideration must be given prior to their application to avoid possible confusion. Here, we provide an updated overview of a list of well-established immunological markers for the labeling of central glia, and discuss the cell-type specificity and stage dependency of their expression.
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Affiliation(s)
- Hao Huang
- Zhejiang Key Laboratory of Organ Development and Regeneration, Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
| | - Wanjun He
- Zhejiang Key Laboratory of Organ Development and Regeneration, Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China
| | - Tao Tang
- Department of Anatomy, Cell Biology and Physiology Stark Neurosciences Research Institute, Indiana University School of Medicine, Indianapolis, IN, 46202, USA
| | - Mengsheng Qiu
- Zhejiang Key Laboratory of Organ Development and Regeneration, Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou, 311121, China.
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7
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Dermitzakis I, Manthou ME, Meditskou S, Miliaras D, Kesidou E, Boziki M, Petratos S, Grigoriadis N, Theotokis P. Developmental Cues and Molecular Drivers in Myelinogenesis: Revisiting Early Life to Re-Evaluate the Integrity of CNS Myelin. Curr Issues Mol Biol 2022; 44:3208-3237. [PMID: 35877446 PMCID: PMC9324160 DOI: 10.3390/cimb44070222] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/14/2022] [Accepted: 07/17/2022] [Indexed: 02/07/2023] Open
Abstract
The mammalian central nervous system (CNS) coordinates its communication through saltatory conduction, facilitated by myelin-forming oligodendrocytes (OLs). Despite the fact that neurogenesis from stem cell niches has caught the majority of attention in recent years, oligodendrogenesis and, more specifically, the molecular underpinnings behind OL-dependent myelinogenesis, remain largely unknown. In this comprehensive review, we determine the developmental cues and molecular drivers which regulate normal myelination both at the prenatal and postnatal periods. We have indexed the individual stages of myelinogenesis sequentially; from the initiation of oligodendrocyte precursor cells, including migration and proliferation, to first contact with the axon that enlists positive and negative regulators for myelination, until the ultimate maintenance of the axon ensheathment and myelin growth. Here, we highlight multiple developmental pathways that are key to successful myelin formation and define the molecular pathways that can potentially be targets for pharmacological interventions in a variety of neurological disorders that exhibit demyelination.
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Affiliation(s)
- Iasonas Dermitzakis
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Maria Eleni Manthou
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Soultana Meditskou
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Dimosthenis Miliaras
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Evangelia Kesidou
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
| | - Marina Boziki
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
| | - Steven Petratos
- Department of Neuroscience, Central Clinical School, Monash University, Prahran, VIC 3004, Australia;
| | - Nikolaos Grigoriadis
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
| | - Paschalis Theotokis
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
- Correspondence:
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8
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Jordans S, Hardt R, Becker I, Winter D, Wang-Eckhardt L, Eckhardt M. Age-Dependent Increase in Schmidt-Lanterman Incisures and a Cadm4-Associated Membrane Skeletal Complex in Fatty Acid 2-hydroxylase Deficient Mice: a Mouse Model of Spastic Paraplegia SPG35. Mol Neurobiol 2022; 59:3969-3979. [PMID: 35445918 PMCID: PMC9167166 DOI: 10.1007/s12035-022-02832-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Accepted: 04/04/2022] [Indexed: 11/26/2022]
Abstract
PNS and CNS myelin contain large amounts of galactocerebroside and sulfatide with 2-hydroxylated fatty acids. The underlying hydroxylation reaction is catalyzed by fatty acid 2-hydroxylase (FA2H). Deficiency in this enzyme causes a complicated hereditary spastic paraplegia, SPG35, which is associated with leukodystrophy. Mass spectrometry-based proteomics of purified myelin isolated from sciatic nerves of Fa2h-deficient (Fa2h−/−) mice revealed an increase in the concentration of the three proteins Cadm4, Mpp6 (Pals2), and protein band 4.1G (Epb41l2) in 17-month-old, but not in young (4 to 6-month-old), Fa2h−/− mice. These proteins are known to form a complex, together with the protein Lin7, in Schmidt-Lanterman incisures (SLIs). Accordingly, the number of SLIs was significantly increased in 17-month-old but not 4-month-old Fa2h−/− mice compared to age-matched wild-type mice. On the other hand, the relative increase in the SLI frequency was less pronounced than expected from Cadm4, Lin7, Mpp6 (Pals2), and band 4.1G (Epb41l2) protein levels. This suggests that the latter not only reflect the higher SLI frequency but that the concentration of the Cadm4 containing complex itself is increased in the SLIs or compact myelin of Fa2h−/− mice and may potentially play a role in the pathogenesis of the disease. The proteome data are available via ProteomeXchange with identifier PXD030244.
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Affiliation(s)
- Silvia Jordans
- Department for Pediatric Hematology and Oncology, Center for Pediatrics, University Hospital Bonn, Venusberg-Campus 1, 53117, Bonn, Germany
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Robert Hardt
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Ivonne Becker
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Dominic Winter
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Lihua Wang-Eckhardt
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Nussallee 11, 53115, Bonn, Germany
| | - Matthias Eckhardt
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Nussallee 11, 53115, Bonn, Germany.
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9
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Enrich-Bengoa J, Manich G, Valente T, Sanchez-Molina P, Almolda B, Solà C, Saura J, González B, Castellano B, Perálvarez-Marín A. TRPV2: A Key Player in Myelination Disorders of the Central Nervous System. Int J Mol Sci 2022; 23:ijms23073617. [PMID: 35408977 PMCID: PMC8999035 DOI: 10.3390/ijms23073617] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 01/27/2023] Open
Abstract
Transient potential receptor vanilloid 2 (TRPV2) is widely expressed through the nervous system and specifically found in neuronal subpopulations and some glial cells. TRPV2 is known to be sensitized by methionine oxidation, which results from inflammation. Here we aim to characterize the expression and regulation of TRPV2 in myelination pathologies, such as hypomyelination and demyelination. We validated the interaction between TRPV2 and its putative interactor Opalin, an oligodendrocyte marker, in mixed glial cultures under pro- and anti-inflammatory conditions. Then, we characterized TRPV2 time-course expression in experimental animal models of hypomyelination (jimpy mice) and de-/remyelination (cuprizone intoxication and experimental autoimmune encephalomyelitis (EAE)). TRPV2 showed upregulation associated with remyelination, inflammation in cuprizone and EAE models, and downregulation in hypomyelinated jimpy mice. TRPV2 expression was altered in human samples of multiple sclerosis (MS) patients. Additionally, we analyzed the expression of methionine sulfoxide reductase A (MSRA), an enzyme that reduces oxidated methionines in TRPV2, which we found increased in inflammatory conditions. These results suggest that TRPV2 may be a key player in myelination in accordance with the recapitulation hypothesis, and that it may become an interesting clinical target in the treatment of demyelination disorders.
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Affiliation(s)
- Jennifer Enrich-Bengoa
- Biophysics Unit, Department of Biochemistry and Molecular Biology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain;
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
| | - Gemma Manich
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Medical Histology Unit, Department of Cell Biology, Physiology and Immunology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Tony Valente
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Medical Histology Unit, Department of Cell Biology, Physiology and Immunology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
- Research Group on Methodology, Methods, Models and Outcomes of Health and Social Sciences (M3O), Experimental Sciences and Methodological Department, Faculty of Health Sciences and Welfare, University of Vic-Central University of Catalonia (UVic-UCC), 08500 Vic, Catalonia, Spain
| | - Paula Sanchez-Molina
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Medical Histology Unit, Department of Cell Biology, Physiology and Immunology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Beatriz Almolda
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Medical Histology Unit, Department of Cell Biology, Physiology and Immunology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Carme Solà
- Department of Cerebral Ischemia and Neurodegeneration, Institut D’Investigacions Biomèdiques de Barcelona-Consejo Superior de Investigaciones Científicas (CSIC), Institut D’Investigacions Biomèdiques August-Pi i Sunyer (IDIBAPS), 08036 Barcelona, Catalonia, Spain;
| | - Josep Saura
- Biochemistry and Molecular Biology Unit, School of Medicine, Institut D’Investigacions Biomèdiques August-Pi i Sunyer (IDIBAPS), University of Barcelona, 08036 Barcelona, Catalonia, Spain;
| | - Berta González
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Medical Histology Unit, Department of Cell Biology, Physiology and Immunology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Bernardo Castellano
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Medical Histology Unit, Department of Cell Biology, Physiology and Immunology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain
| | - Alex Perálvarez-Marín
- Biophysics Unit, Department of Biochemistry and Molecular Biology, School of Medicine, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain;
- Institut de Neurociències, Universitat Autònoma de Barcelona, 08193 Cerdanyola del Vallès, Catalonia, Spain; (G.M.); (T.V.); (P.S.-M.); (B.A.); (B.G.); (B.C.)
- Correspondence: ; Tel.: +34-93-581-4504
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10
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Del Giovane A, Russo M, Tirou L, Faure H, Ruat M, Balestri S, Sposato C, Basoli F, Rainer A, Kassoussi A, Traiffort E, Ragnini-Wilson A. Smoothened/AMP-Activated Protein Kinase Signaling in Oligodendroglial Cell Maturation. Front Cell Neurosci 2022; 15:801704. [PMID: 35082605 PMCID: PMC8784884 DOI: 10.3389/fncel.2021.801704] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Accepted: 11/29/2021] [Indexed: 12/14/2022] Open
Abstract
The regeneration of myelin is known to restore axonal conduction velocity after a demyelinating event. Remyelination failure in the central nervous system contributes to the severity and progression of demyelinating diseases such as multiple sclerosis. Remyelination is controlled by many signaling pathways, such as the Sonic hedgehog (Shh) pathway, as shown by the canonical activation of its key effector Smoothened (Smo), which increases the proliferation of oligodendrocyte precursor cells via the upregulation of the transcription factor Gli1. On the other hand, the inhibition of Gli1 was also found to promote the recruitment of a subset of adult neural stem cells and their subsequent differentiation into oligodendrocytes. Since Smo is also able to transduce Shh signals via various non-canonical pathways such as the blockade of Gli1, we addressed the potential of non-canonical Smo signaling to contribute to oligodendroglial cell maturation in myelinating cells using the non-canonical Smo agonist GSA-10, which downregulates Gli1. Using the Oli-neuM cell line, we show that GSA-10 promotes Gli2 upregulation, MBP and MAL/OPALIN expression via Smo/AMP-activated Protein Kinase (AMPK) signaling, and efficiently increases the number of axonal contact/ensheathment for each oligodendroglial cell. Moreover, GSA-10 promotes the recruitment and differentiation of oligodendroglial progenitors into the demyelinated corpus callosum in vivo. Altogether, our data indicate that non-canonical signaling involving Smo/AMPK modulation and Gli1 downregulation promotes oligodendroglia maturation until axon engagement. Thus, GSA-10, by activation of this signaling pathway, represents a novel potential remyelinating agent.
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Affiliation(s)
- Alice Del Giovane
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Mariagiovanna Russo
- CNRS, Institut des Neurosciences Paris-Saclay, Université Paris-Saclay, Saclay, France
| | - Linda Tirou
- CNRS, Institut des Neurosciences Paris-Saclay, Université Paris-Saclay, Saclay, France
| | - Hélène Faure
- CNRS, Institut des Neurosciences Paris-Saclay, Université Paris-Saclay, Saclay, France
| | - Martial Ruat
- CNRS, Institut des Neurosciences Paris-Saclay, Université Paris-Saclay, Saclay, France
| | - Sonia Balestri
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Carola Sposato
- Department of Biology, University of Rome “Tor Vergata”, Rome, Italy
| | - Francesco Basoli
- Department of Engineering, Università Campus Bio-Medico di Roma, Rome, Italy
| | - Alberto Rainer
- Department of Engineering, Università Campus Bio-Medico di Roma, Rome, Italy
- Institute of Nanotechnology (NANOTEC), National Research Council, Lecce, Italy
| | | | - Elisabeth Traiffort
- INSERM, U1195, Université Paris-Saclay, Le Kremlin-Bicêtre, France
- *Correspondence: Elisabeth Traiffort,
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11
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Bouadi O, Tay TL. More Than Cell Markers: Understanding Heterogeneous Glial Responses to Implantable Neural Devices. Front Cell Neurosci 2021; 15:658992. [PMID: 33912015 PMCID: PMC8071943 DOI: 10.3389/fncel.2021.658992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/17/2021] [Indexed: 11/30/2022] Open
Affiliation(s)
- Ouzéna Bouadi
- Faculty of Biology, University of Freiburg, Freiburg, Germany.,Faculty of Life Sciences, University of Strasbourg, Strasbourg, France
| | - Tuan Leng Tay
- Faculty of Biology, University of Freiburg, Freiburg, Germany.,BrainLinks-BrainTools Centre, University of Freiburg, Freiburg, Germany.,Freiburg Institute of Advanced Studies, University of Freiburg, Freiburg, Germany
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12
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Hardt R, Jordans S, Winter D, Gieselmann V, Wang-Eckhardt L, Eckhardt M. Decreased turnover of the CNS myelin protein Opalin in a mouse model of hereditary spastic paraplegia 35. Hum Mol Genet 2020; 29:3616-3630. [PMID: 33215680 DOI: 10.1093/hmg/ddaa246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/09/2020] [Accepted: 11/10/2020] [Indexed: 02/07/2023] Open
Abstract
Spastic paraplegia 35 (SPG35) (OMIM: 612319) or fatty acid hydroxylase-associated neurodegeneration (FAHN) is caused by deficiency of fatty acid 2-hydroxylase (FA2H). This enzyme synthesizes sphingolipids containing 2-hydroxylated fatty acids, which are particularly abundant in myelin. Fa2h-deficient (Fa2h-/-) mice develop symptoms reminiscent of the human disease and therefore serve as animal model of SPG35. In order to understand further the pathogenesis of SPG35, we compared the proteome of purified CNS myelin isolated from wild type and Fa2h-/- mice at different time points of disease progression using tandem mass tag labeling. Data analysis with a focus on myelin membrane proteins revealed a significant increase of the oligodendrocytic myelin paranodal and inner loop protein (Opalin) in Fa2h-/- mice, whereas the concentration of other major myelin proteins was not significantly changed. Western blot analysis revealed an almost 6-fold increase of Opalin in myelin of Fa2h-/- mice aged 21-23 months. A concurrent unaltered Opalin gene expression suggested a decreased turnover of the Opalin protein in Fa2h-/- mice. Supporting this hypothesis, Opalin protein half-life was reduced significantly when expressed in CHO cells synthesizing 2-hydroxylated sulfatide, compared to cells synthesizing only non-hydroxylated sulfatide. Degradation of Opalin was inhibited by inhibitors of lysosomal degradation but unaffected by proteasome inhibitors. Taken together, these results reveal a new function of 2-hydroxylated sphingolipids namely affecting the turnover of a myelin membrane protein. This may play a role in the pathogenesis of SPG35.
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Affiliation(s)
- Robert Hardt
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Bonn 53115, Germany
| | - Silvia Jordans
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Bonn 53115, Germany
| | - Dominic Winter
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Bonn 53115, Germany
| | - Volkmar Gieselmann
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Bonn 53115, Germany
| | - Lihua Wang-Eckhardt
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Bonn 53115, Germany
| | - Matthias Eckhardt
- Institute of Biochemistry and Molecular Biology, Medical Faculty, University of Bonn, Bonn 53115, Germany
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13
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Tripathi A, Volsko C, Garcia JP, Agirre E, Allan KC, Tesar PJ, Trapp BD, Castelo-Branco G, Sim FJ, Dutta R. Oligodendrocyte Intrinsic miR-27a Controls Myelination and Remyelination. Cell Rep 2020; 29:904-919.e9. [PMID: 31644912 DOI: 10.1016/j.celrep.2019.09.020] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 08/13/2019] [Accepted: 09/06/2019] [Indexed: 12/29/2022] Open
Abstract
Remyelination requires the generation of new oligodendrocytes (OLs), which are derived from oligodendrocyte progenitor cells (OPCs). Maturation of OPCs into OLs is a multi-step process. Here, we describe a microRNA expressed by OLs, miR-27a, as a regulator of OL development and survival. Increased levels of miR-27a were found in OPCs associated with multiple sclerosis (MS) lesions and in animal models of demyelination. Increased levels of miR-27a led to inhibition of OPC proliferation by cell-cycle arrest, as well as impaired differentiation of human OPCs (hOPCs) and myelination by dysregulating the Wnt-β-catenin signaling pathway. In vivo administration of miR-27a led to suppression of myelinogenic signals, leading to loss of endogenous myelination and remyelination. Our findings provide evidence supporting a critical role for a steady-state level of OL-specific miR-27a in supporting multiple steps in the complex process of OPC maturation and remyelination.
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Affiliation(s)
- Ajai Tripathi
- Department of Neurosciences, Cleveland Clinic, Cleveland, OH, USA
| | - Christina Volsko
- Department of Neurosciences, Cleveland Clinic, Cleveland, OH, USA
| | - Jessie P Garcia
- Jacob's School of Medicine and Biomedical Sciences, University of Buffalo, Buffalo, NY, USA
| | - Eneritz Agirre
- Laboratory of Molecular Neurobiology, Department of Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Kevin C Allan
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Paul J Tesar
- Department of Genetics and Genome Sciences, Case Western Reserve University, Cleveland, OH, USA
| | - Bruce D Trapp
- Department of Neurosciences, Cleveland Clinic, Cleveland, OH, USA
| | - Goncalo Castelo-Branco
- Laboratory of Molecular Neurobiology, Department of Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Fraser J Sim
- Jacob's School of Medicine and Biomedical Sciences, University of Buffalo, Buffalo, NY, USA
| | - Ranjan Dutta
- Department of Neurosciences, Cleveland Clinic, Cleveland, OH, USA; Cleveland Clinic Lerner College of Medicine, Cleveland, OH, USA.
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14
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Jahn O, Siems SB, Kusch K, Hesse D, Jung RB, Liepold T, Uecker M, Sun T, Werner HB. The CNS Myelin Proteome: Deep Profile and Persistence After Post-mortem Delay. Front Cell Neurosci 2020; 14:239. [PMID: 32973451 PMCID: PMC7466725 DOI: 10.3389/fncel.2020.00239] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/07/2020] [Indexed: 12/14/2022] Open
Abstract
Myelin membranes are dominated by lipids while the complexity of their protein composition has long been considered to be low. However, numerous additional myelin proteins have been identified since. Here we revisit the proteome of myelin biochemically purified from the brains of healthy c56Bl/6N-mice utilizing complementary proteomic approaches for deep qualitative and quantitative coverage. By gel-free, label-free mass spectrometry, the most abundant myelin proteins PLP, MBP, CNP, and MOG constitute 38, 30, 5, and 1% of the total myelin protein, respectively. The relative abundance of myelin proteins displays a dynamic range of over four orders of magnitude, implying that PLP and MBP have overshadowed less abundant myelin constituents in initial gel-based approaches. By comparisons with published datasets we evaluate to which degree the CNS myelin proteome correlates with the mRNA and protein abundance profiles of myelin and oligodendrocytes. Notably, the myelin proteome displays only minor changes if assessed after a post-mortem delay of 6 h. These data provide the most comprehensive proteome resource of CNS myelin so far and a basis for addressing proteomic heterogeneity of myelin in mouse models and human patients with white matter disorders.
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Affiliation(s)
- Olaf Jahn
- Proteomics Group, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Sophie B. Siems
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Kathrin Kusch
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Dörte Hesse
- Proteomics Group, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Ramona B. Jung
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Thomas Liepold
- Proteomics Group, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Marina Uecker
- Proteomics Group, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Ting Sun
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Hauke B. Werner
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
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15
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Su W, Matsumoto S, Banine F, Srivastava T, Dean J, Foster S, Pham P, Hammond B, Peters A, Girish KS, Rangappa KS, Basappa, Jose J, Hennebold JD, Murphy MJ, Bennett-Toomey J, Back SA, Sherman LS. A modified flavonoid accelerates oligodendrocyte maturation and functional remyelination. Glia 2019; 68:263-279. [PMID: 31490574 DOI: 10.1002/glia.23715] [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: 12/12/2017] [Revised: 08/06/2019] [Accepted: 08/15/2019] [Indexed: 12/19/2022]
Abstract
Myelination delay and remyelination failure following insults to the central nervous system (CNS) impede axonal conduction and lead to motor, sensory and cognitive impairments. Both myelination and remyelination are often inhibited or delayed due to the failure of oligodendrocyte progenitor cells (OPCs) to mature into myelinating oligodendrocytes (OLs). Digestion products of the glycosaminoglycan hyaluronan (HA) have been implicated in blocking OPC maturation, but how these digestion products are generated is unclear. We tested the possibility that hyaluronidase activity is directly linked to the inhibition of OPC maturation by developing a novel modified flavonoid that functions as a hyaluronidase inhibitor. This compound, called S3, blocks some but not all hyaluronidases and only inhibits matrix metalloproteinase activity at high concentrations. We find that S3 reverses HA-mediated inhibition of OPC maturation in vitro, an effect that can be overcome by excess recombinant hyaluronidase. Furthermore, we find that hyaluronidase inhibition by S3 accelerates OPC maturation in an in vitro model of perinatal white matter injury. Finally, blocking hyaluronidase activity with S3 promotes functional remyelination in mice with lysolecithin-induced demyelinating corpus callosum lesions. All together, these findings support the notion that hyaluronidase activity originating from OPCs in CNS lesions is sufficient to prevent OPC maturation, which delays myelination or blocks remyelination. These data also indicate that modified flavonoids can act as selective inhibitors of hyaluronidase activity and can promote OPC maturation, making them excellent candidates to accelerate myelination or promote remyelination following perinatal and adult CNS insults.
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Affiliation(s)
- Weiping Su
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Steven Matsumoto
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon.,Integrative Biosciences Department, School Dentistry, Oregon Health and Science University, Portland, Oregon
| | - Fatima Banine
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Taasin Srivastava
- Department of Pediatrics, Oregon Health and Science University, Portland, Oregon
| | - Justin Dean
- Department of Physiology, Faculty of Medical and Health Sciences, University of Auckland, Auckland, New Zealand
| | - Scott Foster
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Peter Pham
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Brian Hammond
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Alec Peters
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Kesturu S Girish
- Department of Studies and Research in Biochemistry, Tumkur University, Tumakuru, India
| | | | - Basappa
- Department of Studies in Organic Chemistry, University of Mysore, Manasagangotri, India
| | - Joachim Jose
- Institute of Pharmaceutical and Medicinal Chemistry, Phytochemistry, PharmaCampus, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Jon D Hennebold
- Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Melinda J Murphy
- Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Jill Bennett-Toomey
- Division of Reproductive and Developmental Sciences, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon
| | - Stephen A Back
- Department of Pediatrics, Oregon Health and Science University, Portland, Oregon.,Department of Neurology, Oregon Health and Science University, Portland, Oregon
| | - Larry S Sherman
- Division of Neuroscience, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, Oregon.,Department of Cell, Developmental and Cancer Biology, Oregon Health and Science University, Portland, Oregon
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16
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Almiron Bonnin DA, Havrda MC, Lee MC, Evans L, Ran C, Qian DC, Harrington LX, Valdes PA, Cheng C, Amos CI, Harris BT, Paulsen KD, Roberts DW, Israel MA. Characterizing the heterogeneity in 5-aminolevulinic acid-induced fluorescence in glioblastoma. J Neurosurg 2019; 132:1706-1714. [PMID: 31125970 DOI: 10.3171/2019.2.jns183128] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 02/22/2019] [Indexed: 12/15/2022]
Abstract
OBJECTIVE 5-aminolevulinic acid (5-ALA)-induced protoporphyrin IX (PpIX) fluorescence is an effective surgical adjunct for the intraoperative identification of tumor tissue during resection of high-grade gliomas. The use of 5-ALA-induced PpIX fluorescence in glioblastoma (GBM) has been shown to double the extent of gross-total resection and 6-month progression-free survival. The heterogeneity of 5-ALA-induced PpIX fluorescence observed during surgery presents a technical and diagnostic challenge when utilizing this tool intraoperatively. While some regions show bright fluorescence after 5-ALA administration, other regions do not, despite that both regions of the tumor may be histopathologically indistinguishable. The authors examined the biological basis of this heterogeneity using computational methods. METHODS The authors collected both fluorescent and nonfluorescent GBM specimens from a total of 14 patients undergoing surgery and examined their gene expression profiles. RESULTS In this study, the authors found that the gene expression patterns characterizing fluorescent and nonfluorescent GBM surgical specimens were profoundly different and were associated with distinct cellular functions and different biological pathways. Nonfluorescent tumor tissue tended to resemble the neural subtype of GBM; meanwhile, fluorescent tumor tissue did not exhibit a prominent pattern corresponding to known subtypes of GBM. Consistent with this observation, neural GBM samples from The Cancer Genome Atlas database exhibited a significantly lower fluorescence score than nonneural GBM samples as determined by a fluorescence gene signature developed by the authors. CONCLUSIONS These results provide a greater understanding regarding the biological basis of differential fluorescence observed intraoperatively and can provide a basis to identify novel strategies to maximize the effectiveness of fluorescence agents.
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Affiliation(s)
- Damian A Almiron Bonnin
- 1Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover.,2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon
| | - Matthew C Havrda
- 1Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover.,2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon
| | - Myung Chang Lee
- 2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon.,3Department of Biology, Dartmouth College, Hanover
| | - Linton Evans
- 4Department of Surgery (Neurosurgery), Geisel School of Medicine at Dartmouth, Hanover.,5Department of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon
| | - Cong Ran
- 1Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover.,2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon
| | - David C Qian
- 6Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Lia X Harrington
- 6Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Pablo A Valdes
- 7Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Chao Cheng
- 1Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover.,2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon.,6Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Chris I Amos
- 1Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover.,2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon.,6Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
| | - Brent T Harris
- 8Department of Pathology, Georgetown University Medical Center, Washington, DC
| | - Keith D Paulsen
- 2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon.,4Department of Surgery (Neurosurgery), Geisel School of Medicine at Dartmouth, Hanover.,5Department of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon.,9Thayer School of Engineering, Dartmouth College, Hanover
| | - David W Roberts
- 2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon.,4Department of Surgery (Neurosurgery), Geisel School of Medicine at Dartmouth, Hanover.,5Department of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon.,9Thayer School of Engineering, Dartmouth College, Hanover
| | - Mark A Israel
- 1Department of Molecular and Systems Biology, Geisel School of Medicine at Dartmouth, Hanover.,2Norris Cotton Cancer Center, Geisel School of Medicine at Dartmouth, Lebanon.,10Department of Medicine, Geisel School of Medicine at Dartmouth, Hanover; and.,11Department of Pediatrics, Geisel School of Medicine at Dartmouth, Hanover, New Hampshire
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17
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de Faria O, Dhaunchak AS, Kamen Y, Roth AD, Kuhlmann T, Colman DR, Kennedy TE. TMEM10 Promotes Oligodendrocyte Differentiation and is Expressed by Oligodendrocytes in Human Remyelinating Multiple Sclerosis Plaques. Sci Rep 2019; 9:3606. [PMID: 30837646 PMCID: PMC6400977 DOI: 10.1038/s41598-019-40342-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 01/25/2019] [Indexed: 11/09/2022] Open
Abstract
Oligodendrocyte precursor cells (OPCs) differentiate during postnatal development into myelin-forming oligodendrocytes, in a process distinguished by substantial changes in morphology and the onset of myelin gene expression. A mammalian-specific CNS myelin gene, tmem10, also called Opalin, encodes a type 1 transmembrane protein that is highly upregulated during early stages of OPC differentiation; however, a function for TMEM10 has not yet been identified. Here, consistent with previous studies, we detect TMEM10 protein in mouse brain beginning at ~P10 and show that protein levels continue to increase as oligodendrocytes differentiate and myelinate axons in vivo. We show that constitutive TMEM10 overexpression in the Oli-neu oligodendroglial cell line promotes the expression of the myelin-associated genes MAG, CNP and CGT, whereas TMEM10 knock down in primary OPCs reduces CNP mRNA expression and decreases the percentage of MBP-positive oligodendrocytes that differentiate in vitro. Ectopic TMEM10 expression evokes an increase in process extension and branching, and blocking endogenous TMEM10 expression results in oligodendrocytes with abnormal cell morphology. These findings may have implications for human demyelinating disorders, as oligodendrocytes expressing TMEM10 are detected in human remyelinating multiple sclerosis lesions. Together, our findings provide evidence that TMEM10 promotes oligodendrocyte terminal differentiation and may represent a novel target to promote remyelination in demyelinating disorders.
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Affiliation(s)
- Omar de Faria
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, Quebec, H3A 2B4, Canada
| | - Ajit S Dhaunchak
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, Quebec, H3A 2B4, Canada
| | - Yasmine Kamen
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, Quebec, H3A 2B4, Canada
| | - Alejandro D Roth
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, Quebec, H3A 2B4, Canada.,Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Santiago, Chile
| | - Tanja Kuhlmann
- Institute of Neuropathology, University Hospital Münster, D-48149, Münster, Germany
| | - David R Colman
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, Quebec, H3A 2B4, Canada
| | - Timothy E Kennedy
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, 3801 University St., Montreal, Quebec, H3A 2B4, Canada.
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18
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Hedtke V, Bakovic M. Choline transport for phospholipid synthesis: An emerging role of choline transporter-like protein 1. Exp Biol Med (Maywood) 2019; 244:655-662. [PMID: 30776907 DOI: 10.1177/1535370219830997] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
IMPACT STATEMENT This review will provide a summary of recent advances in choline transport research and highlight important novel areas of focus in the field.
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Affiliation(s)
- Vera Hedtke
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario N1G 2W1, Canada
| | - Marica Bakovic
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario N1G 2W1, Canada
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19
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Elazar N, Vainshtein A, Golan N, Vijayaragavan B, Schaeren-Wiemers N, Eshed-Eisenbach Y, Peles E. Axoglial Adhesion by Cadm4 Regulates CNS Myelination. Neuron 2018; 101:224-231.e5. [PMID: 30551998 DOI: 10.1016/j.neuron.2018.11.032] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 10/03/2018] [Accepted: 11/16/2018] [Indexed: 10/27/2022]
Abstract
The initiation of axoglial contact is considered a prerequisite for myelination, yet the role cell adhesion molecules (CAMs) play in mediating such interactions remains unclear. To examine the function of axoglial CAMs, we tested whether enhanced CAM-mediated adhesion between OLs and neurons could affect myelination. Here we show that increased expression of a membrane-bound extracellular domain of Cadm4 (Cadm4dCT) in cultured oligodendrocytes results in the production of numerous axoglial contact sites that fail to elongate and generate mature myelin. Transgenic mice expressing Cadm4dCT were hypomyelinated and exhibit multiple myelin abnormalities, including myelination of neuronal somata. These abnormalities depend on specific neuron-glial interaction as they were not observed when these OLs were cultured alone, on nanofibers, or on neurons isolated from mice lacking the axonal receptors of Cadm4. Our results demonstrate that tightly regulated axon-glia adhesion is essential for proper myelin targeting and subsequent membrane wrapping and lateral extension.
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Affiliation(s)
- Nimrod Elazar
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Anya Vainshtein
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Neev Golan
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Bharath Vijayaragavan
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot 76100, Israel
| | | | - Yael Eshed-Eisenbach
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Elior Peles
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot 76100, Israel.
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20
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Tripathi RB, Jackiewicz M, McKenzie IA, Kougioumtzidou E, Grist M, Richardson WD. Remarkable Stability of Myelinating Oligodendrocytes in Mice. Cell Rep 2018; 21:316-323. [PMID: 29020619 PMCID: PMC5643547 DOI: 10.1016/j.celrep.2017.09.050] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Revised: 08/24/2017] [Accepted: 09/13/2017] [Indexed: 12/17/2022] Open
Abstract
New myelin-forming oligodendrocytes (OLs) are generated in the mouse central nervous system during adulthood. These adult-born OLs might augment the existing population, contributing to neural plasticity, or else replace OLs that die in use (turnover). To distinguish between these alternatives, we induced genetic labeling of mature myelinating OLs in young adult mice and tracked their subsequent survival. OL survival rates were region dependent, being higher in corpus callosum (∼90% survival over 20 months) and motor cortex (∼70% survival) than in corticospinal tract or optic nerve (50%-60% survival). Survival rates over the first 8 months were 90%-100% in all regions except the optic nerve. In the corpus callosum, new OLs accumulate during young adulthood and are therefore likely to participate in adaptive myelination. We also found that the number of myelin internodes maintained by individual cortical OLs is stable for at least 8 months but declines ∼12% in the following year.
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Affiliation(s)
- Richa B Tripathi
- Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6BT, UK
| | - Martyna Jackiewicz
- Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6BT, UK
| | - Ian A McKenzie
- Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6BT, UK
| | - Eleni Kougioumtzidou
- Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6BT, UK
| | - Matthew Grist
- Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6BT, UK
| | - William D Richardson
- Wolfson Institute for Biomedical Research, University College London, Gower Street, London WC1E 6BT, UK.
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21
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Bang ML, Vainshtein A, Yang HJ, Eshed-Eisenbach Y, Devaux J, Werner HB, Peles E. Glial M6B stabilizes the axonal membrane at peripheral nodes of Ranvier. Glia 2018; 66:801-812. [PMID: 29282769 PMCID: PMC5812800 DOI: 10.1002/glia.23285] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 12/06/2017] [Accepted: 12/11/2017] [Indexed: 12/18/2022]
Abstract
Glycoprotein M6B and the closely related proteolipid protein regulate oligodendrocyte myelination in the central nervous system, but their role in the peripheral nervous system is less clear. Here we report that M6B is located at nodes of Ranvier in peripheral nerves where it stabilizes the nodal axolemma. We show that M6B is co-localized and associates with gliomedin at Schwann cell microvilli that are attached to the nodes. Developmental analysis of sciatic nerves, as well as of myelinating Schwann cells/dorsal root ganglion neurons cultures, revealed that M6B is already present at heminodes, which are considered the precursors of mature nodes of Ranvier. However, in contrast to gliomedin, which accumulates at heminodes with or prior to Na+ channels, we often detected Na+ channel clusters at heminodes without any associated M6B, indicating that it is not required for initial channel clustering. Consistently, nodal cell adhesion molecules (NF186, NrCAM), ion channels (Nav1.2 and Kv7.2), cytoskeletal proteins (AnkG and βIV spectrin), and microvilli components (pERM, syndecan3, gliomedin), are all present at both heminodes and mature nodes of Ranvier in Gpm6b null mice. Using transmission electron microscopy, we show that the absence of M6B results in progressive appearance of nodal protrusions of the nodal axolemma, that are often accompanied by the presence of enlarged mitochondria. Our results reveal that M6B is a Schwann cell microvilli component that preserves the structural integrity of peripheral nodes of Ranvier.
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Affiliation(s)
- Marie L Bang
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Anya Vainshtein
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Hyun-Jeong Yang
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Yael Eshed-Eisenbach
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Jerome Devaux
- Aix-Marseille University, CNRS, CRN2M-UMR 7286, Marseille, France
| | - Hauke B Werner
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Goettingen, Germany
| | - Elior Peles
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
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22
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Rosenzweig ES, Brock JH, Lu P, Kumamaru H, Salegio EA, Kadoya K, Weber JL, Liang JJ, Moseanko R, Hawbecker S, Huie JR, Havton LA, Nout-Lomas YS, Ferguson AR, Beattie MS, Bresnahan JC, Tuszynski MH. Restorative effects of human neural stem cell grafts on the primate spinal cord. Nat Med 2018; 24:484-490. [PMID: 29480894 DOI: 10.1038/nm.4502] [Citation(s) in RCA: 209] [Impact Index Per Article: 34.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 01/26/2018] [Indexed: 12/14/2022]
Abstract
We grafted human spinal cord-derived neural progenitor cells (NPCs) into sites of cervical spinal cord injury in rhesus monkeys (Macaca mulatta). Under three-drug immunosuppression, grafts survived at least 9 months postinjury and expressed both neuronal and glial markers. Monkey axons regenerated into grafts and formed synapses. Hundreds of thousands of human axons extended out from grafts through monkey white matter and synapsed in distal gray matter. Grafts gradually matured over 9 months and improved forelimb function beginning several months after grafting. These findings in a 'preclinical trial' support translation of NPC graft therapy to humans with the objective of reconstituting both a neuronal and glial milieu in the site of spinal cord injury.
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Affiliation(s)
- Ephron S Rosenzweig
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA
| | - John H Brock
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA.,Veterans Administration Medical Center, La Jolla, California, USA
| | - Paul Lu
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA.,Veterans Administration Medical Center, La Jolla, California, USA
| | - Hiromi Kumamaru
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA
| | - Ernesto A Salegio
- California National Primate Research Center, University of California, Davis, Davis, California, USA
| | - Ken Kadoya
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA.,Department of Orthopaedic Surgery, Hokkaido University, Sapporo, Japan
| | - Janet L Weber
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA
| | - Justine J Liang
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA
| | - Rod Moseanko
- California National Primate Research Center, University of California, Davis, Davis, California, USA
| | - Stephanie Hawbecker
- California National Primate Research Center, University of California, Davis, Davis, California, USA
| | - J Russell Huie
- Department of Neurosurgery, University of California, San Francisco, San Francisco, California, USA
| | - Leif A Havton
- Department of Neurology, University of California, Los Angeles, Los Angeles, California, USA
| | - Yvette S Nout-Lomas
- College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Adam R Ferguson
- Department of Neurosurgery, University of California, San Francisco, San Francisco, California, USA.,Veterans Administration Medical Center, San Francisco, California, USA
| | - Michael S Beattie
- Department of Neurosurgery, University of California, San Francisco, San Francisco, California, USA
| | - Jacqueline C Bresnahan
- Department of Neurosurgery, University of California, San Francisco, San Francisco, California, USA
| | - Mark H Tuszynski
- Department of Neurosciences, University of California, San Diego, La Jolla, California, USA.,Veterans Administration Medical Center, La Jolla, California, USA
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23
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Chao MW, Yang CH, Lin PT, Yang YH, Chuang YC, Chung MC, Tseng CY. Exposure to PM 2.5 causes genetic changes in fetal rat cerebral cortex and hippocampus. ENVIRONMENTAL TOXICOLOGY 2017; 32:1412-1425. [PMID: 27539004 DOI: 10.1002/tox.22335] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2016] [Revised: 07/29/2016] [Accepted: 07/30/2016] [Indexed: 05/06/2023]
Abstract
PM2.5 travels along the respiratory tract and enters systemic blood circulation. Studies have shown that PM2.5 increases the incidence of various diseases not only in adults but also in newborn infants. It causes chronic inflammation in pregnant women and retards fetal development. In this study, pregnant rats were exposed to PM2.5 for extended periods of time and it was found that PM2.5 exposure increased immune cells in mother rats. In addition, cytokines and free radicals rapidly accumulated in the amniotic fluid and indirectly affected the fetuses. The authors collected cerebral cortex and hippocampus samples at E18 and analyzed changes of miRNA levels. Expression levels of cortical miR-6315, miR-3588, and miR-466b-5p were upregulated, and positively correlated with the genes Pkn2 (astrocyte migration), Gorab (neuritogenesis), and Mobp (allergic encephalomyelitis). In contrast, PM2.5 decreased expression of miR-338-5p and let-7e-5p, both related to mental development. Further, PM2.5 exposure increased miR-3560 and let-7b-5p in the hippocampus, two proteins that regulate genes Oxct1 and Lin28b that control ketogenesis and glycosylation, and neural cell differentiation, respectively. miR-99b-5p, miR-92b-5p, and miR-99a-5p were decreased, leading to reduced expression of Kbtbd8 and Adam11 which reduced cell mitosis, migration, and differentiation, and inhibited learning abilities and motor coordination of the fetus. © 2016 Wiley Periodicals, Inc. Environ Toxicol 32: 1412-1425, 2017.
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Affiliation(s)
- Ming-Wei Chao
- Department of Bioscience Technology College of Science, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
- Center for Nanotechnology, College of Science, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
| | - Chin-Hua Yang
- Department of Diagnostic Radiology, Taoyuan General Hospital, Taoyaun, 310, Taiwan
- Departmewnt of Biomedical Engineering and Environmental Science, National Tsing Hua University, East District, Hsinchu 300, Taiwan
| | - Po-Ting Lin
- Department of Mechanical Engineering, College of Engineering, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
| | - Yu-Hsiu Yang
- Department of Biomedical Engineering College of Engineering, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
| | - Yu-Chen Chuang
- Department of Biomedical Engineering College of Engineering, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
| | - Meng-Chi Chung
- Department of Bioscience Technology College of Science, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
| | - Chia-Yi Tseng
- Center for Nanotechnology, College of Science, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
- Department of Biomedical Engineering College of Engineering, Chung Yuan Christian University, Zhongli district, Taoyaun, 320, Taiwan
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24
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Akkermann R, Aprico A, Perera AA, Bujalka H, Cole AE, Xiao J, Field J, Kilpatrick TJ, Binder MD. The TAM receptor Tyro3 regulates myelination in the central nervous system. Glia 2017; 65:581-591. [PMID: 28145605 DOI: 10.1002/glia.23113] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Revised: 12/05/2016] [Accepted: 12/20/2016] [Indexed: 11/12/2022]
Abstract
Myelin is an essential component of the mammalian nervous system, facilitating rapid conduction of electrical impulses by axons, as well as providing trophic support to neurons. Within the central nervous system, the oligodendrocyte is the specialized neural cell responsible for producing myelin by a process that is thought to be regulated by both activity dependent and independent mechanisms but in incompletely understood ways. We have previously identified that the protein Gas6, a ligand for a family of tyrosine kinase receptors known as the TAM (Tyro3, Axl, and Mertk) receptors, directly increases oligodendrocyte induced myelination in vitro. Gas6 can bind to and activate all three TAM receptors, but the high level of expression of Tyro3 on oligodendrocytes makes this receptor the principal candidate for transducing the pro-myelinating effect of Gas6. In this study, we establish that in the absence of Tyro3, the pro-myelinating effect of Gas6 is lost, that developmental myelination is delayed and that the myelin produced is thinner than normal. We show that this effect is specific to the myelination process and not due to changes in the proliferation or differentiation of oligodendrocyte precursor cells. We have further demonstrated that the reduction in myelination is due to the loss of Tyro3 on oligodendrocytes, and this effect may be mediated by activation of Erk1. Collectively, our findings indicate the critical importance of Tyro3 in potentiating central nervous system myelination. GLIA 2017 GLIA 2017;65:581-591.
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Affiliation(s)
- Rainer Akkermann
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Andrea Aprico
- The Florey Institute of Neuroscience and Mental Health, 30 Royal Parade (Cnr Genetics Lane), Parkville, Victoria, 3052, Australia
| | - Ashwyn A Perera
- The Florey Institute of Neuroscience and Mental Health, 30 Royal Parade (Cnr Genetics Lane), Parkville, Victoria, 3052, Australia
| | - Helena Bujalka
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Alistair E Cole
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Junhua Xiao
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Judith Field
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia.,The Florey Institute of Neuroscience and Mental Health, 30 Royal Parade (Cnr Genetics Lane), Parkville, Victoria, 3052, Australia
| | - Trevor J Kilpatrick
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia.,The Florey Institute of Neuroscience and Mental Health, 30 Royal Parade (Cnr Genetics Lane), Parkville, Victoria, 3052, Australia
| | - Michele D Binder
- Department of Anatomy and Neuroscience, University of Melbourne, Parkville, Victoria, 3010, Australia.,The Florey Institute of Neuroscience and Mental Health, 30 Royal Parade (Cnr Genetics Lane), Parkville, Victoria, 3052, Australia
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25
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Yoshikawa F, Sato Y, Tohyama K, Akagi T, Furuse T, Sadakata T, Tanaka M, Shinoda Y, Hashikawa T, Itohara S, Sano Y, Ghandour MS, Wakana S, Furuichi T. Mammalian-Specific Central Myelin Protein Opalin Is Redundant for Normal Myelination: Structural and Behavioral Assessments. PLoS One 2016; 11:e0166732. [PMID: 27855200 PMCID: PMC5113975 DOI: 10.1371/journal.pone.0166732] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/02/2016] [Indexed: 11/19/2022] Open
Abstract
Opalin, a central nervous system-specific myelin protein phylogenetically unique to mammals, has been suggested to play a role in mammalian-specific myelin. To elucidate the role of Opalin in mammalian myelin, we disrupted the Opalin gene in mice and analyzed the impacts on myelination and behavior. Opalin-knockout (Opalin−/−) mice were born at a Mendelian ratio and had a normal body shape and weight. Interestingly, Opalin−/− mice had no obvious abnormalities in major myelin protein compositions, expression of oligodendrocyte lineage markers, or domain organization of myelinated axons compared with WT mice (Opalin+/+) mice. Electron microscopic observation of the optic nerves did not reveal obvious differences between Opalin+/+ and Opalin−/− mice in terms of fine structures of paranodal loops, transverse bands, and multi-lamellae of myelinated axons. Moreover, sensory reflex, circadian rhythm, and locomotor activity in the home cage, as well as depression-like behavior, in the Opalin−/− mice were indistinguishable from the Opalin+/+ mice. Nevertheless, a subtle but significant impact on exploratory activity became apparent in Opalin−/− mice exposed to a novel environment. These results suggest that Opalin is not critical for central nervous system myelination or basic sensory and motor activities under conventional breeding conditions, although it might be required for fine-tuning of exploratory behavior.
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Affiliation(s)
- Fumio Yoshikawa
- Laboratory for Molecular Neurogenesis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
| | - Yumi Sato
- Laboratory for Molecular Neurogenesis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
| | - Koujiro Tohyama
- The Center for Electron Microscopy and Bio-Imaging Research and Department of Physiology, Iwate Medical University, Morioka, Iwate, 020–8505, Japan
| | - Takumi Akagi
- Support Unit for Neuromorphological Analysis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
| | - Tamio Furuse
- Technology and Development Team for Mouse Phenotype Analysis, RIKEN BioResource Center, Tsukuba, Ibaraki, 305–0074, Japan
| | - Tetsushi Sadakata
- Laboratory for Molecular Neurogenesis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
- Advanced Scientific Research Leaders Development Unit, Gunma University, Maebashi, Gunma, 371–8511, Japan
| | - Mika Tanaka
- Laboratory for Behavioral Genetics, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
| | - Yo Shinoda
- Laboratory for Molecular Neurogenesis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
- School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Tokyo, 192–0392, Japan
| | - Tsutomu Hashikawa
- Support Unit for Neuromorphological Analysis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
| | - Shigeyoshi Itohara
- Laboratory for Behavioral Genetics, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
| | - Yoshitake Sano
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, Chiba, 278–8510, Japan
| | - M. Said Ghandour
- Unite´ Mixte de Recherche 7357, Université de Strasbourg, Strasbourg, 67085, France and Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, Virginia, United States of America
| | - Shigeharu Wakana
- Technology and Development Team for Mouse Phenotype Analysis, RIKEN BioResource Center, Tsukuba, Ibaraki, 305–0074, Japan
| | - Teiichi Furuichi
- Laboratory for Molecular Neurogenesis, RIKEN Brain Science Institute, Wako, Saitama, 351–0198, Japan
- Department of Applied Biological Science, Faculty of Science and Technology, Tokyo University of Science, Chiba, 278–8510, Japan
- * E-mail:
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26
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G protein-coupled receptor 37 is a negative regulator of oligodendrocyte differentiation and myelination. Nat Commun 2016; 7:10884. [PMID: 26961174 PMCID: PMC4792952 DOI: 10.1038/ncomms10884] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 01/29/2016] [Indexed: 12/22/2022] Open
Abstract
While the formation of myelin by oligodendrocytes is critical for the function of the
central nervous system, the molecular mechanism controlling oligodendrocyte
differentiation remains largely unknown. Here we identify G protein-coupled receptor
37 (GPR37) as an inhibitor of late-stage oligodendrocyte differentiation and
myelination. GPR37 is enriched in oligodendrocytes and its expression increases
during their differentiation into myelin forming cells. Genetic deletion of
Gpr37 does not affect the number of oligodendrocyte precursor cells, but
results in precocious oligodendrocyte differentiation and hypermyelination. The
inhibition of oligodendrocyte differentiation by GPR37 is mediated by suppression of
an exchange protein activated by cAMP (EPAC)-dependent activation of Raf-MAPK-ERK1/2
module and nuclear translocation of ERK1/2. Our data suggest that GPR37 regulates
central nervous system myelination by controlling the transition from
early-differentiated to mature oligodendrocytes. The molecular mechanism controlling oligodendrocyte differentiation is
not fully understood. Here the authors show that G protein coupled receptor 37 acts as a
negative regulator of CNS myelination, and this effect is mediated by suppression of ERK
signalling.
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27
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Transcriptional analysis of glial cell differentiation in the postnatal murine spinal cord. Int J Dev Neurosci 2015; 42:24-36. [PMID: 25702526 DOI: 10.1016/j.ijdevneu.2015.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Revised: 01/28/2015] [Accepted: 02/14/2015] [Indexed: 11/20/2022] Open
Abstract
Postnatal murine spinal cord represents a good model system to study mammalian central nervous system myelination in vivo as a basis for further studies in demyelinating diseases. Transcriptional changes were analyzed in SJL/J mice on postnatal day 0, 14, 49 and 231 (P0, P14, P49, P231) employing Affymetrix GeneChip Mouse Genome 430 2.0 Arrays. Additionally, marker gene signatures for astrocyte and oligodendrocyte lineage-stages were defined to study their gene expression in more detail. In addition, immunohistochemistry was used to quantify the abundance of commonly used glial cell markers. 6092 differentially regulated genes (DEGs) were identified. The up-regulated DEGs at P14, P49 and P231 compared to P0 exhibited significantly enriched associations to gene ontology terms such as myelination and lipid metabolic transport and down-regulated DEGs to neurogenesis and axonogenesis. Expression values of marker gene signatures for neural stem cells, oligodendrocyte precursor cells, and developing astrocytes were constantly decreasing, whereas myelinating oligodendrocyte and mature astrocyte markers showed a steady increase. Molecular findings were substantiated by immunohistochemical observations. The transcriptional changes observed are an important reference for future analysis of degenerative and inflammatory conditions in the spinal cord.
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Oligodendrocyte precursor cell-intrinsic effect of Rheb1 controls differentiation and mediates mTORC1-dependent myelination in brain. J Neurosci 2015; 34:15764-78. [PMID: 25411504 DOI: 10.1523/jneurosci.2267-14.2014] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Rheb1 is an immediate early gene that functions to activate mammalian target of rapamycin (mTor) selectively in complex 1 (mTORC1). We have demonstrated previously that Rheb1 is essential for myelination in the CNS using a Nestin-Cre driver line that deletes Rheb1 in all neural cell lineages, and recent studies using oligodendrocyte-specific CNP-Cre have suggested a preferential role for mTORC1 is myelination in the spinal cord. Here, we examine the role of Rheb1/mTORC1 in mouse oligodendrocyte lineage using separate Cre drivers for oligodendrocyte progenitor cells (OPCs) including Olig1-Cre and Olig2-Cre as well as differentiated and mature oligodendrocytes including CNP-Cre and Tmem10-Cre. Deletion of Rheb1 in OPCs impairs their differentiation to mature oligodendrocytes. This is accompanied by reduced OPC cell-cycle exit suggesting a requirement for Rheb1 in OPC differentiation. The effect of Rheb1 on OPC differentiation is mediated by mTor since Olig1-Cre deletion of mTor phenocopies Olig1-Cre Rheb1 deletion. Deletion of Rheb1 in mature oligodendrocytes, in contrast, does not disrupt developmental myelination or myelin maintenance. Loss of Rheb1 in OPCs or neural progenitors does not affect astrocyte formation in gray and white matter, as indicated by the pan-astrocyte marker Aldh1L1. We conclude that OPC-intrinsic mTORC1 activity mediated by Rheb1 is critical for differentiation of OPCs to mature oligodendrocytes, but that mature oligodendrocytes do not require Rheb1 to make myelin or maintain it in the adult brain. These studies reveal mechanisms that may be relevant for both developmental myelination and impaired remyelination in myelin disease.
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Age-dependent redistribution and hypersialylation of the central myelin paranodal loop membrane protein Opalin in the mouse brain. Neurosci Lett 2014; 581:14-9. [DOI: 10.1016/j.neulet.2014.08.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 07/31/2014] [Accepted: 08/07/2014] [Indexed: 01/25/2023]
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Conditional ablation of astroglial CCL2 suppresses CNS accumulation of M1 macrophages and preserves axons in mice with MOG peptide EAE. J Neurosci 2014; 34:8175-85. [PMID: 24920622 DOI: 10.1523/jneurosci.1137-14.2014] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Current multiple sclerosis (MS) therapies only partially prevent chronically worsening neurological deficits, which are largely attributable to progressive loss of CNS axons. Prior studies of experimental autoimmune encephalomyelitis (EAE) induced in C57BL/6 mice by immunization with myelin oligodendrocyte glycoprotein peptide 35-55 (MOG peptide), a model of MS, documented continued axon loss for months after acute CNS inflammatory infiltrates had subsided, and massive astroglial induction of CCL2 (MCP-1), a chemokine for CCR2(+) monocytes. We now report that conditional deletion of astroglial CCL2 significantly decreases CNS accumulation of classically activated (M1) monocyte-derived macrophages and microglial expression of M1 markers during the initial CNS inflammatory phase of MOG peptide EAE, reduces the acute and long-term severity of clinical deficits and slows the progression of spinal cord axon loss. In addition, lack of astroglial-derived CCL2 results in increased accumulation of Th17 cells within the CNS in these mice, but also in greater confinement of CD4(+) lymphocytes to CNS perivascular spaces. These findings suggest that therapies designed to inhibit astroglial CCL2-driven trafficking of monocyte-derived macrophages to the CNS during acute MS exacerbations have the potential to significantly reduce CNS axon loss and slow progression of neurological deficits.
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Myocilin is involved in NgR1/Lingo-1-mediated oligodendrocyte differentiation and myelination of the optic nerve. J Neurosci 2014; 34:5539-51. [PMID: 24741044 DOI: 10.1523/jneurosci.4731-13.2014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Myocilin is a secreted glycoprotein that belongs to a family of olfactomedin domain-containing proteins. Although myocilin is detected in several ocular and nonocular tissues, the only reported human pathology related to mutations in the MYOCILIN gene is primary open-angle glaucoma. Functions of myocilin are poorly understood. Here we demonstrate that myocilin is a mediator of oligodendrocyte differentiation and is involved in the myelination of the optic nerve in mice. Myocilin is expressed and secreted by optic nerve astrocytes. Differentiation of optic nerve oligodendrocytes is delayed in Myocilin-null mice. Optic nerves of Myocilin-null mice contain reduced levels of several myelin-associated proteins including myelin basic protein, myelin proteolipid protein, and 2'3'-cyclic nucleotide 3'-phosphodiesterase compared with those of wild-type littermates. This leads to reduced myelin sheath thickness of optic nerve axons in Myocilin-null mice compared with wild-type littermates, and this difference is more pronounced at early postnatal stages compared with adult mice. Myocilin also affects differentiation of oligodendrocyte precursors in vitro. Its addition to primary cultures of differentiating oligodendrocyte precursors increases levels of tested markers of oligodendrocyte differentiation and stimulates elongation of oligodendrocyte processes. Myocilin stimulation of oligodendrocyte differentiation occurs through the NgR1/Lingo-1 receptor complex. Myocilin physically interacts with Lingo-1 and may be considered as a Lingo-1 ligand. Myocilin-induced elongation of oligodendrocyte processes may be mediated by activation of FYN and suppression of RhoA GTPase.
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Jiang W, Yang W, Yang W, Zhang J, Pang D, Gan L, Luo L, Fan Y, Liu Y, Chen M. Identification of Tmem10 as a novel late-stage oligodendrocytes marker for detecting hypomyelination. Int J Biol Sci 2013; 10:33-42. [PMID: 24391449 PMCID: PMC3879589 DOI: 10.7150/ijbs.7526] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Accepted: 11/20/2013] [Indexed: 02/05/2023] Open
Abstract
Oligodendrocytes ensheath axons to form compact insulating multilamellar structures known as myelin. Tmem10 is a novel type I transmembrane glycoprotein that is highly expressed in oligodendrocytes and whose biological function remains largely unknown. Furthermore, the expression pattern of Tmem10 remains a matter of some controversy. Given the inconsistency of its expression pattern and the lack of validated specific antibodies, Tmem10 is not widely accepted as a marker for mature oligodendrocytes. As a means to solve these problems and to aid future studies of oligodendrocyte-associated diseases, we have generated a highly specific Tmem10 antibody. Using this Tmem10 antibody, we clarify that Tmem10 protein is firstly expressed at 2 weeks in the postnatal mouse brain with age-related increase, only in the central nervous system (CNS). We also reveal that Tmem10 is expressed specifically in late stage oligodendrocytes and later than MAG, a late-stage myelin marker. Finally, we show that Tmem10 co-expresses with MOG- and MBP-positive myelin fibers and is dramatically reduced in a hypomyelination mouse model. In conclusion, our study demonstrates that Tmem10 can be used as a specific marker for myelinating oligodendrocytes and perhaps for the evaluation of myelination diseases, such as multiple sclerosis.
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Affiliation(s)
- Wanxiang Jiang
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Wanchun Yang
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Weiwei Yang
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Junyan Zhang
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Dejiang Pang
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Lingxue Gan
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Liping Luo
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yingjun Fan
- 2. Department of neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Yanhui Liu
- 2. Department of neurosurgery, West China Hospital, Sichuan University, Chengdu 610041, China
| | - Mina Chen
- 1. State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu 610041, China
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de Monasterio-Schrader P, Jahn O, Tenzer S, Wichert SP, Patzig J, Werner HB. Systematic approaches to central nervous system myelin. Cell Mol Life Sci 2012; 69:2879-94. [PMID: 22441408 PMCID: PMC11114939 DOI: 10.1007/s00018-012-0958-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2012] [Accepted: 03/05/2012] [Indexed: 12/11/2022]
Abstract
Rapid signal propagation along vertebrate axons is facilitated by their insulation with myelin, a plasma membrane specialization of glial cells. The recent application of 'omics' approaches to the myelinating cells of the central nervous system, oligodendrocytes, revealed their mRNA signatures, enhanced our understanding of how myelination is regulated, and established that the protein composition of myelin is much more complex than previously thought. This review provides a meta-analysis of the > 1,200 proteins thus far identified by mass spectrometry in biochemically purified central nervous system myelin. Contaminating proteins are surprisingly infrequent according to bioinformatic prediction of subcellular localization and comparison with the transcriptional profile of oligodendrocytes. The integration of datasets also allowed the subcategorization of the myelin proteome into functional groups comprising genes that are coregulated during oligodendroglial differentiation. An unexpectedly large number of myelin-related genes cause-when mutated in humans-hereditary diseases affecting the physiology of the white matter. Systematic approaches to oligodendrocytes and myelin thus provide valuable resources for the molecular dissection of developmental myelination, glia-axonal interactions, leukodystrophies, and demyelinating diseases.
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Affiliation(s)
| | - Olaf Jahn
- Proteomics Group, Max Planck Institute of Experimental Medicine, Göttingen, Germany
- DFG Research Center for Molecular Physiology of the Brain, Göttingen, Germany
| | - Stefan Tenzer
- Institute of Immunology, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Sven P. Wichert
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Julia Patzig
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
| | - Hauke B. Werner
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Hermann-Rein-Str. 3, 37075 Göttingen, Germany
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Disruption of NMDA receptors in oligodendroglial lineage cells does not alter their susceptibility to experimental autoimmune encephalomyelitis or their normal development. J Neurosci 2012; 32:639-45. [PMID: 22238099 DOI: 10.1523/jneurosci.4073-11.2012] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Pharmacological studies have suggested that oligodendroglial NMDA glutamate receptors (NMDARs) mediate white matter injury in a variety of CNS diseases, including multiple sclerosis (MS). We tested this hypothesis in experimental autoimmune encephalomyelitis (EAE), a model of human MS, by timed conditional disruption of oligodendroglial NR1, an essential subunit of functional NMDARs, using an inducible proteolipid protein (Plp) promoter-driven Cre-loxP recombination system. We found that selective ablation of oligodendroglial NR1 did not alter the clinical severity of EAE elicited in C57BL/6 mice by immunization with myelin oligodendrocyte glycoprotein peptide 35-55 (MOG-peptide), nor were there significant differences between the oligodendroglial NR1 KO and non-KO mice in numbers of axons lost in spinal cord dorsal funiculi or severity of spinal cord demyelination. Similarly, constitutive deletion of NR3A, a modulatory subunit of oligodendroglial NMDARs, did not alter the course of MOG-peptide EAE. Furthermore, conditional and constitutive ablation of NR1 in neonatal oligodendrocyte progenitor cells did not interrupt their normal maturation and differentiation. Collectively, our data suggest that oligodendroglial lineage NMDARs are neither required for timely postnatal development of the oligodendroglial lineage, nor significant participants in the pathophysiology of MOG-peptide EAE.
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Ivanovic A, Horresh I, Golan N, Spiegel I, Sabanay H, Frechter S, Ohno S, Terada N, Möbius W, Rosenbluth J, Brose N, Peles E. The cytoskeletal adapter protein 4.1G organizes the internodes in peripheral myelinated nerves. ACTA ACUST UNITED AC 2012; 196:337-44. [PMID: 22291039 PMCID: PMC3275379 DOI: 10.1083/jcb.201111127] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Deletion of the Schwann cell cytoskeletal adapter protein 4.1G led to aberrant distribution of glial adhesion molecules and axonal proteins along the internodes. Myelinating Schwann cells regulate the localization of ion channels on the surface of the axons they ensheath. This function depends on adhesion complexes that are positioned at specific membrane domains along the myelin unit. Here we show that the precise localization of internodal proteins depends on the expression of the cytoskeletal adapter protein 4.1G in Schwann cells. Deletion of 4.1G in mice resulted in aberrant distribution of both glial adhesion molecules and axonal proteins that were present along the internodes. In wild-type nerves, juxtaparanodal proteins (i.e., Kv1 channels, Caspr2, and TAG-1) were concentrated throughout the internodes in a double strand that flanked paranodal junction components (i.e., Caspr, contactin, and NF155), and apposes the inner mesaxon of the myelin sheath. In contrast, in 4.1G−/− mice, these proteins “piled up” at the juxtaparanodal region or aggregated along the internodes. These findings suggest that protein 4.1G contributes to the organization of the internodal axolemma by targeting and/or maintaining glial transmembrane proteins along the axoglial interface.
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Affiliation(s)
- Aleksandra Ivanovic
- Department of Molecular Neurobiology and 2 Department of Neurogenetics, Max Planck Institute of Experimental Medicine, D-37075 Göttingen, Germany
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A size barrier limits protein diffusion at the cell surface to generate lipid-rich myelin-membrane sheets. Dev Cell 2011; 21:445-56. [PMID: 21885353 DOI: 10.1016/j.devcel.2011.08.001] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 07/08/2011] [Accepted: 08/01/2011] [Indexed: 01/18/2023]
Abstract
The insulating layers of myelin membrane wrapped around axons by oligodendrocytes are essential for the rapid conduction of nerve impulses in the central nervous system. To fulfill this function as an electrical insulator, myelin requires a unique lipid and protein composition. Here we show that oligodendrocytes employ a barrier that functions as a physical filter to generate the lipid-rich myelin-membrane sheets. Myelin basic protein (MBP) forms this molecular sieve and restricts the diffusion of proteins with large cytoplasmic domains into myelin. The barrier is generated from MBP molecules that line the entire sheet and is, thus, intimately intertwined with the biogenesis of the polarized cell surface. This system might have evolved in oligodendrocytes in order to generate an anisotropic membrane organization that facilitates the assembly of highly insulating lipid-rich membranes.
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Potter KA, Kern MJ, Fullbright G, Bielawski J, Scherer SS, Yum SW, Li JJ, Cheng H, Han X, Venkata JK, Khan PAA, Rohrer B, Hama H. Central nervous system dysfunction in a mouse model of FA2H deficiency. Glia 2011; 59:1009-21. [PMID: 21491498 DOI: 10.1002/glia.21172] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Accepted: 03/03/2011] [Indexed: 11/09/2022]
Abstract
Fatty acid 2-hydroxylase (FA2H) is responsible for the synthesis of myelin galactolipids containing hydroxy fatty acid (hFA) as the N-acyl chain. Mutations in the FA2H gene cause leukodystrophy, spastic paraplegia, and neurodegeneration with brain iron accumulation. Using the Cre-lox system, we developed two types of mouse mutants, Fa2h(-/-) mice (Fa2h deleted in all cells by germline deletion) and Fa2h(flox/flox) Cnp1-Cre mice (Fa2h deleted only in oligodendrocytes and Schwann cells). We found significant demyelination, profound axonal loss, and abnormally enlarged axons in the CNS of Fa2h(-/-) mice at 12 months of age, while structure and function of peripheral nerves were largely unaffected. Fa2h(-/-) mice also exhibited histological and functional disruption in the cerebellum at 12 months of age. In a time course study, significant deterioration of cerebellar function was first detected at 7 months of age. Further behavioral assessments in water T-maze and Morris water maze tasks revealed significant deficits in spatial learning and memory at 4 months of age. These data suggest that various regions of the CNS are functionally compromised in young adult Fa2h(-/-) mice. The cerebellar deficits in 12-month-old Fa2h(flox/flox) Cnp1-Cre mice were indistinguishable from Fa2h(-/-) mice, indicating that these phenotypes likely stem from the lack of myelin hFA-galactolipids. In contrast, Fa2h(flox/flox) Cnp1-Cre mice did not show reduced performance in water maze tasks, indicating that oligodendrocytes are not involved in the learning and memory deficits found in Fa2h(-/-) mice. These findings provide the first evidence that FA2H has an important function outside of oligodendrocytes in the CNS.
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Affiliation(s)
- Kathleen A Potter
- Department of Biochemistry and Molecular Biology, Medical University of South Carolina, Charleston, South Carolina 29425, USA
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Identification of a gene regulatory network necessary for the initiation of oligodendrocyte differentiation. PLoS One 2011; 6:e18088. [PMID: 21490970 PMCID: PMC3072388 DOI: 10.1371/journal.pone.0018088] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 02/20/2011] [Indexed: 11/19/2022] Open
Abstract
Differentiation of oligodendrocyte progenitor cells (OPCs) into mature oligodendrocytes requires extensive changes in gene expression, which are partly mediated by post-translational modifications of nucleosomal histones. An essential modification for oligodendrocyte differentiation is the removal of acetyl groups from lysine residues which is catalyzed by histone deacetylases (HDACs). The transcriptional targets of HDAC activity within OPCs however, have remained elusive and have been identified in this study by interrogating the oligodendrocyte transcriptome. Using a novel algorithm that allows clustering of gene transcripts according to expression kinetics and expression levels, we defined major waves of co-regulated genes. The initial overall decrease in gene expression was followed by the up-regulation of genes involved in lipid metabolism and myelination. Functional annotation of the down-regulated gene clusters identified transcripts involved in cell cycle regulation, transcription, and RNA processing. To define whether these genes were the targets of HDAC activity, we cultured rat OPCs in the presence of trichostatin A (TSA), an HDAC inhibitor previously shown to inhibit oligodendrocyte differentiation. By overlaying the defined oligodendrocyte transcriptome with the list of 'TSA sensitive' genes, we determined that a high percentage of 'TSA sensitive' genes are part of a normal program of oligodendrocyte differentiation. TSA treatment increased the expression of genes whose down-regulation occurs very early after induction of OPC differentiation, but did not affect the expression of genes with a slower kinetic. Among the increased 'TSA sensitive' genes we detected several transcription factors including Id2, Egr1, and Sox11, whose down-regulation is critical for OPC differentiation. Thus, HDAC target genes include clusters of co-regulated genes involved in transcriptional repression. These results support a de-repression model of oligodendrocyte lineage progression that relies on the concurrent down-regulation of several inhibitors of differentiation.
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NG2 glia generate new oligodendrocytes but few astrocytes in a murine experimental autoimmune encephalomyelitis model of demyelinating disease. J Neurosci 2011; 30:16383-90. [PMID: 21123584 DOI: 10.1523/jneurosci.3411-10.2010] [Citation(s) in RCA: 188] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The adult mammalian brain and spinal cord contain glial precursors that express platelet-derived growth factor receptor α subunit (PDGFRA) and the NG2 proteoglycan. These "NG2 cells" descend from oligodendrocyte precursors in the perinatal CNS and continue to generate myelinating oligodendrocytes in the gray and white matter of the postnatal brain. It has been proposed that NG2 cells can also generate reactive astrocytes at sites of CNS injury or demyelination. To test this we examined the fates of PDGFRA/NG2 cells in the mouse spinal cord during experimental autoimmune encephalomyelitis (EAE)--a demyelinating condition that models some aspects of multiple sclerosis in humans. We administered tamoxifen to Pdgfra-CreER(T2):Rosa26R-YFP mice to induce yellow fluorescent protein (YFP) expression in PDGFRA/NG2 cells and their differentiated progeny. We subsequently induced EAE and observed a large (>4-fold) increase in the local density of YFP(+) cells, >90% of which were oligodendrocyte lineage cells. Many of these became CC1-positive, NG2-negative differentiated oligodendrocytes that expressed myelin markers CNP and Tmem10/Opalin. PDGFRA/NG2 cells generated very few GFAP(+)-reactive astrocytes (1-2% of all YFP(+) cells) or NeuN(+) neurons (<0.02%). Thus, PDGFRA/NG2 cells act predominantly as a reservoir of new oligodendrocytes in the demyelinated spinal cord.
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Eisenbach M, Kartvelishvily E, Eshed-Eisenbach Y, Watkins T, Sorensen A, Thomson C, Ranscht B, Barnett SC, Brophy P, Peles E. Differential clustering of Caspr by oligodendrocytes and Schwann cells. J Neurosci Res 2010; 87:3492-501. [PMID: 19565653 DOI: 10.1002/jnr.22157] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Formation of the paranodal axoglial junction (PNJ) requires the presence of three cell adhesion molecules: the 155-kDa isoform of neurofascin (NF155) on the glial membrane and a complex of Caspr and contactin found on the axolemma. Here we report that the clustering of Caspr along myelinated axons during development differs fundamentally between the central (CNS) and peripheral (PNS) nervous systems. In cultures of Schwann cells (SC) and dorsal root ganglion (DRG) neurons, membrane accumulation of Caspr was detected only after myelination. In contrast, in oligodendrocytes (OL)/DRG neurons cocultures, Caspr was clustered upon initial glial cell contact already before myelination had begun. Premyelination clustering of Caspr was detected in cultures of oligodendrocytes and retinal ganglion cells, motor neurons, and DRG neurons as well as in mixed cell cultures of rat forebrain and spinal cords. Cocultures of oligodendrocyte precursor cells isolated from contactin- or neurofascin-deficient mice with wild-type DRG neurons showed that clustering of Caspr at initial contact sites between OL processes and the axon requires glial expression of NF155 but not of contactin. These results demonstrate that the expression of membrane proteins along the axolemma is determined by the type of the contacting glial cells and is not an intrinsic characteristic of the axon.
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Affiliation(s)
- Menahem Eisenbach
- Department of Molecular Cell Biology, The Weizmann Institute of Science, Rehovot, Israel
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Myelin proteomics: molecular anatomy of an insulating sheath. Mol Neurobiol 2009; 40:55-72. [PMID: 19452287 PMCID: PMC2758371 DOI: 10.1007/s12035-009-8071-2] [Citation(s) in RCA: 218] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2009] [Accepted: 04/14/2009] [Indexed: 12/12/2022]
Abstract
Fast-transmitting vertebrate axons are electrically insulated with multiple layers of nonconductive plasma membrane of glial cell origin, termed myelin. The myelin membrane is dominated by lipids, and its protein composition has historically been viewed to be of very low complexity. In this review, we discuss an updated reference compendium of 342 proteins associated with central nervous system myelin that represents a valuable resource for analyzing myelin biogenesis and white matter homeostasis. Cataloging the myelin proteome has been made possible by technical advances in the separation and mass spectrometric detection of proteins, also referred to as proteomics. This led to the identification of a large number of novel myelin-associated proteins, many of which represent low abundant components involved in catalytic activities, the cytoskeleton, vesicular trafficking, or cell adhesion. By mass spectrometry-based quantification, proteolipid protein and myelin basic protein constitute 17% and 8% of total myelin protein, respectively, suggesting that their abundance was previously overestimated. As the biochemical profile of myelin-associated proteins is highly reproducible, differential proteome analyses can be applied to material isolated from patients or animal models of myelin-related diseases such as multiple sclerosis and leukodystrophies.
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