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Evans AD, Pournoori N, Saksala E, Oommen OP. Glycosaminoglycans' for brain health: Harnessing glycosaminoglycan based biomaterials for treating central nervous system diseases and in-vitro modeling. Biomaterials 2024; 309:122629. [PMID: 38797120 DOI: 10.1016/j.biomaterials.2024.122629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 05/06/2024] [Accepted: 05/19/2024] [Indexed: 05/29/2024]
Abstract
Dysfunction of the central nervous system (CNS) following traumatic brain injuries (TBI), spinal cord injuries (SCI), or strokes remains challenging to address using existing medications and cell-based therapies. Although therapeutic cell administration, such as stem cells and neuronal progenitor cells (NPCs), have shown promise in regenerative properties, they have failed to provide substantial benefits. However, the development of living cortical tissue engineered grafts, created by encapsulating these cells within an extracellular matrix (ECM) mimetic hydrogel scaffold, presents a promising functional replacement for damaged cortex in cases of stroke, SCI, and TBI. These grafts facilitate neural network repair and regeneration following CNS injuries. Given that natural glycosaminoglycans (GAGs) are a major constituent of the CNS, GAG-based hydrogels hold potential for the next generation of CNS healing therapies and in vitro modeling of CNS diseases. Brain-specific GAGs not only offer structural and biochemical signaling support to encapsulated neural cells but also modulate the inflammatory response in lesioned brain tissue, facilitating host integration and regeneration. This review briefly discusses different roles of GAGs and their related proteoglycan counterparts in healthy and diseases brain and explores current trends and advancements in GAG-based biomaterials for treating CNS injuries and modeling diseases. Additionally, it examines injectable, 3D bioprintable, and conductive GAG-based scaffolds, highlighting their clinical potential for in vitro modeling of patient-specific neural dysfunction and their ability to enhance CNS regeneration and repair following CNS injury in vivo.
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Affiliation(s)
- Austin D Evans
- Bioengineering and Nanomedicine Group, Faculty of Medicine and Health Technologies, Tampere University, 33720, Tampere, Finland
| | - Negin Pournoori
- Bioengineering and Nanomedicine Group, Faculty of Medicine and Health Technologies, Tampere University, 33720, Tampere, Finland
| | - Emmi Saksala
- Bioengineering and Nanomedicine Group, Faculty of Medicine and Health Technologies, Tampere University, 33720, Tampere, Finland
| | - Oommen P Oommen
- Bioengineering and Nanomedicine Group, Faculty of Medicine and Health Technologies, Tampere University, 33720, Tampere, Finland; School of Pharmacy and Pharmaceutical Sciences, Cardiff University, King Edward VII Avenue, Cardiff CF10 3NB, UK.
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2
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Siddiqui AM, Sabljic TF, Ball AK. Anatomical location of injected microglia in different activation states and time course of injury determines survival of retinal ganglion cells after optic nerve crush. Int J Neurosci 2024; 134:677-699. [PMID: 36371721 DOI: 10.1080/00207454.2022.2142579] [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: 03/29/2022] [Revised: 10/03/2022] [Accepted: 10/17/2022] [Indexed: 11/06/2022]
Abstract
Background: Activated microglia release harmful substances to retinal ganglion cells (RGCs), but may also benefit by removing cellular debris and secreting neurotrophic factors. These paradoxical roles remain controversial because the nature and time-course of the injury that defines their role is unknown. The aim of this study was to determine if pharmacological manipulation of microglia to acquire a pro-inflammatory or pro-survival phenotype will exacerbate or enhance neuronal survival after injury.Material and methods: Treated HAP I (highly aggressively proliferating immortalized) microglia were injected into the vitreous or tail vein (T V) of female Sprague-Dawley rats. Retinas were examined at 4-14 days following optic nerve crush (ONC) and the number of surviving RGCs was determined.Results: Injection of untreated HAP I cells resulted in the greater loss of RGCs early after ONC when injected into the vitreous and later after ONC when injected into the T V. LP S activated HAP I cells injected into the vitreous resulted in greater RGC loss with and without injury. When injected into the T V with ONC there was no loss of RGCs 4 days after ONC but greater loss afterwards. Minocycline treated HAP I cells injected into the vitreous resulted in greater RGC survival than untreated HAP I cells. However, when injected into the T V with ONC there was greater loss of RGCs. These results suggest that optic nerve signals attract extrinsic microglia to the retina, resulting in a proinflammatory response.Conclusion: Neuroprotection or cytotoxicity of microglia depends on the type of activation, time course of the injury, and if they act on the axon or cell body.
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Affiliation(s)
- Ahad M Siddiqui
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Thomas F Sabljic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Alexander K Ball
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
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3
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Rexrode LE, Hartley J, Showmaker KC, Challagundla L, Vandewege MW, Martin BE, Blair E, Bollavarapu R, Antonyraj RB, Hilton K, Gardiner A, Valeri J, Gisabella B, Garrett MR, Theoharides TC, Pantazopoulos H. Molecular profiling of the hippocampus of children with autism spectrum disorder. Mol Psychiatry 2024:10.1038/s41380-024-02441-8. [PMID: 38355786 DOI: 10.1038/s41380-024-02441-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 01/16/2024] [Accepted: 01/18/2024] [Indexed: 02/16/2024]
Abstract
Several lines of evidence point to a key role of the hippocampus in Autism Spectrum Disorders (ASD). Altered hippocampal volume and deficits in memory for person and emotion related stimuli have been reported, along with enhanced ability for declarative memories. Mouse models have demonstrated a critical role of the hippocampus in social memory dysfunction, associated with ASD, together with decreased synaptic plasticity. Chondroitin sulfate proteoglycans (CSPGs), a family of extracellular matrix molecules, represent a potential key link between neurodevelopment, synaptic plasticity, and immune system signaling. There is a lack of information regarding the molecular pathology of the hippocampus in ASD. We conducted RNAseq profiling on postmortem human brain samples containing the hippocampus from male children with ASD (n = 7) and normal male children (3-14 yrs old), (n = 6) from the NIH NeuroBioBank. Gene expression profiling analysis implicated molecular pathways involved in extracellular matrix organization, neurodevelopment, synaptic regulation, and immune system signaling. qRT-PCR and Western blotting were used to confirm several of the top markers identified. The CSPG protein BCAN was examined with multiplex immunofluorescence to analyze cell-type specific expression of BCAN and astrocyte morphology. We observed decreased expression of synaptic proteins PSD95 (p < 0.02) and SYN1 (p < 0.02), increased expression of the extracellular matrix (ECM) protease MMP9 (p < 0.03), and decreased expression of MEF2C (p < 0.03). We also observed increased BCAN expression with astrocytes in children with ASD, together with altered astrocyte morphology. Our results point to alterations in immune system signaling, glia cell differentiation, and synaptic signaling in the hippocampus of children with ASD, together with alterations in extracellular matrix molecules. Furthermore, our results demonstrate altered expression of genes implicated in genetic studies of ASD including SYN1 and MEF2C.
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Affiliation(s)
- Lindsay E Rexrode
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | - Joshua Hartley
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | | | - Lavanya Challagundla
- Department of Cell and Molecular Biology, University of Mississippi Medical School, Jackson, MS, USA
| | | | - Brigitte E Martin
- Department of Cell and Molecular Biology, University of Mississippi Medical School, Jackson, MS, USA
| | - Estelle Blair
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | - Ratna Bollavarapu
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | - Rhenius B Antonyraj
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | - Keauna Hilton
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | - Alex Gardiner
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
| | - Jake Valeri
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
- Program in Neuroscience, University of Mississippi Medical School, Jackson, MS, USA
| | - Barbara Gisabella
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA
- Program in Neuroscience, University of Mississippi Medical School, Jackson, MS, USA
| | - Michael R Garrett
- Department of Cell and Molecular Biology, University of Mississippi Medical School, Jackson, MS, USA
| | - Theoharis C Theoharides
- Institute of Neuro-Immune Medicine, Nova Southeastern University, Clearwater, FL, USA
- Department of Immunology, Tufts University School of Medicine, Boston, MA, USA
| | - Harry Pantazopoulos
- Department of Psychiatry and Human Behavior, University of Mississippi Medical School, Jackson, MS, USA.
- Program in Neuroscience, University of Mississippi Medical School, Jackson, MS, USA.
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Manohar K, Mesfin FM, Liu J, Shelley WC, Brokaw JP, Markel TA. Effect of Oral Chondroitin Sulfate Supplementation on Acute Brain Injury in a Murine Necrotizing Enterocolitis Model. J Am Coll Surg 2024; 238:82-98. [PMID: 37870229 DOI: 10.1097/xcs.0000000000000896] [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] [Indexed: 10/24/2023]
Abstract
BACKGROUND Necrotizing enterocolitis (NEC) is a devastating condition where inflammatory changes and necrosis in the gut results in activation of brain microglia and subsequent neurodevelopmental impairment. Chondroitin sulfate (CS) is a glycosaminoglycan in human breast milk that is absent in conventional formulas. We hypothesized that oral formula supplementation with CS during a murine model of experimental NEC would not only attenuate intestinal injury, but also brain injury. STUDY DESIGN NEC was induced in mouse pups on postnatal days (PNDs) 5 to 8. Three conditions were studied: (1) breastfed controls, (2) NEC, and (3) NEC+enteral CS (formula+200 mg/kg/d of CS). Pups were euthanized on PND 9 or reunited with dams by the evening of PND 8. Intestinal segments were H&E stained, and immunohistochemistry was performed on brain tissue for Iba-1 to assess for microglial morphology and cortical changes. Neurodevelopmental assays were performed on mice reunited with foster dams on PND 9. Single-cell RNA-sequencing analysis was performed on human intestinal epithelial cells exposed to (1) nothing, (2) hydrogen peroxide (H 2 O 2 ) alone, or (3) H 2 O 2 + CS to look at the differential gene expression between groups. Groups were compared with ANOVA or Kruskal-Wallis tests as appropriate with p < 0.05 considered significant. RESULTS Compared with NEC, mice treated with oral CS showed improved clinical outcomes, decreased intestinal injury, and attenuated microglial activation and deleterious cortical change. Mice with CS performed better on early neurodevelopmental assays when compared with NEC alone. Single-cell analysis of HIEC-6 cells demonstrated that CS treatment down regulated several inflammatory pathways including nuclear factor κB-suggesting an explanation for the improved Th17 intestinal cytokine profile. CONCLUSIONS Oral CS supplementation improved both physiological, clinical, and developmental outcomes. These data suggest that CS is a safe compound for formula supplementation for the prevention of NEC.
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Affiliation(s)
- Krishna Manohar
- From the Department of Surgery, Indiana University School of Medicine, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
- Riley Hospital for Children at Indiana University Health, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
| | - Fikir M Mesfin
- From the Department of Surgery, Indiana University School of Medicine, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
- Riley Hospital for Children at Indiana University Health, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
| | - Jianyun Liu
- From the Department of Surgery, Indiana University School of Medicine, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
- Riley Hospital for Children at Indiana University Health, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
| | - W Christopher Shelley
- From the Department of Surgery, Indiana University School of Medicine, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
- Riley Hospital for Children at Indiana University Health, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
| | - John P Brokaw
- From the Department of Surgery, Indiana University School of Medicine, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
- Riley Hospital for Children at Indiana University Health, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
| | - Troy A Markel
- From the Department of Surgery, Indiana University School of Medicine, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
- Riley Hospital for Children at Indiana University Health, Indianapolis, IN (Manohar, Mesfin, Liu, Shelley, Brokaw, Markel)
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5
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Costa G, Ribeiro FF, Sebastião AM, Muir EM, Vaz SH. Bridging the gap of axonal regeneration in the central nervous system: A state of the art review on central axonal regeneration. Front Neurosci 2022; 16:1003145. [PMID: 36440273 PMCID: PMC9682039 DOI: 10.3389/fnins.2022.1003145] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 10/19/2022] [Indexed: 08/26/2023] Open
Abstract
Neuronal regeneration in the central nervous system (CNS) is an important field of research with relevance to all types of neuronal injuries, including neurodegenerative diseases. The glial scar is a result of the astrocyte response to CNS injury. It is made up of many components creating a complex environment in which astrocytes play various key roles. The glial scar is heterogeneous, diverse and its composition depends upon the injury type and location. The heterogeneity of the glial scar observed in different situations of CNS damage and the consequent implications for axon regeneration have not been reviewed in depth. The gap in this knowledge will be addressed in this review which will also focus on our current understanding of central axonal regeneration and the molecular mechanisms involved. The multifactorial context of CNS regeneration is discussed, and we review newly identified roles for components previously thought to solely play an inhibitory role in central regeneration: astrocytes and p75NTR and discuss their potential and relevance for deciding therapeutic interventions. The article ends with a comprehensive review of promising new therapeutic targets identified for axonal regeneration in CNS and a discussion of novel ways of looking at therapeutic interventions for several brain diseases and injuries.
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Affiliation(s)
- Gonçalo Costa
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
- Faculdade de Medicina, Universidade do Porto, Porto, Portugal
| | - Filipa F. Ribeiro
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Ana M. Sebastião
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Elizabeth M. Muir
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, United Kingdom
| | - Sandra H. Vaz
- Instituto de Medicina Molecular João Lobo Antunes, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
- Instituto de Farmacologia e Neurociências, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
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6
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Chio JCT, Punjani N, Hejrati N, Zavvarian MM, Hong J, Fehlings MG. Extracellular Matrix and Oxidative Stress Following Traumatic Spinal Cord Injury: Physiological and Pathophysiological Roles and Opportunities for Therapeutic Intervention. Antioxid Redox Signal 2022; 37:184-207. [PMID: 34465134 DOI: 10.1089/ars.2021.0120] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Significance: Traumatic spinal cord injury (SCI) causes significant disruption to neuronal, glial, vascular, and extracellular elements. The spinal cord extracellular matrix (ECM) comprises structural and communication proteins that are involved in reparative and regenerative processes after SCI. In the healthy spinal cord, the ECM helps maintain spinal cord homeostasis. After SCI, the damaged ECM limits plasticity and contributes to inflammation through the expression of damage-associated molecules such as proteoglycans. Recent Advances: Considerable insights have been gained by characterizing the origins of the gliotic and fibrotic scars, which not only reduce the spread of injury but also limit neuroregeneration. These properties likely limit the success of therapies used to treat patients with SCI. The ECM, which is a major contributor to the scars and normal physiological functions of the spinal cord, represents an exciting therapeutic target to enhance recovery post-SCI. Critical Issue: Various ECM-based preclinical therapies have been developed. These include disrupting scar components, inhibiting activity of ECM metalloproteinases, and maintaining iron homeostasis. Biomaterials have also been explored. However, the majority of these treatments have not experienced successful clinical translation. This could be due to the ECM and scars' polarizing roles. Future Directions: This review surveys the complexity involved in spinal ECM modifications, discusses new ECM-based combinatorial strategies, and explores the biomaterials evaluated in clinical trials, which hope to introduce new treatments that enhance recovery after SCI. These topics will incorporate oxidative species, which are both beneficial and harmful in reparative and regenerative processes after SCI, and not often assessed in pertinent literature. Antioxid. Redox Signal. 37, 184-207.
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Affiliation(s)
- Jonathon Chon Teng Chio
- Department of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Canada.,Institute of Medical Science, University of Toronto, Toronto, Canada
| | - Nayaab Punjani
- Department of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Canada.,Institute of Medical Science, University of Toronto, Toronto, Canada
| | - Nader Hejrati
- Department of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Canada
| | - Mohammad-Masoud Zavvarian
- Department of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Canada.,Institute of Medical Science, University of Toronto, Toronto, Canada
| | - James Hong
- Department of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Canada
| | - Michael G Fehlings
- Department of Genetics and Development, Krembil Brain Institute, University Health Network, Toronto, Canada.,Institute of Medical Science, University of Toronto, Toronto, Canada.,Department of Surgery and Spine Program, University of Toronto, Toronto, Canada
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7
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Chondroitin sulfate proteoglycans prevent immune cell phenotypic conversion and inflammation resolution via TLR4 in rodent models of spinal cord injury. Nat Commun 2022; 13:2933. [PMID: 35614038 PMCID: PMC9133109 DOI: 10.1038/s41467-022-30467-5] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 05/03/2022] [Indexed: 12/13/2022] Open
Abstract
Chondroitin sulfate proteoglycans (CSPGs) act as potent inhibitors of axonal growth and neuroplasticity after spinal cord injury (SCI). Here we reveal that CSPGs also play a critical role in preventing inflammation resolution by blocking the conversion of pro-inflammatory immune cells to a pro-repair phenotype in rodent models of SCI. We demonstrate that enzymatic digestion of CSPG glycosaminoglycans enhances immune cell clearance and reduces pro-inflammatory protein and gene expression profiles at key resolution time points. Analysis of phenotypically distinct immune cell clusters revealed CSPG-mediated modulation of macrophage and microglial subtypes which, together with T lymphocyte infiltration and composition changes, suggests a role for CSPGs in modulating both innate and adaptive immune responses after SCI. Mechanistically, CSPG activation of a pro-inflammatory phenotype in pro-repair immune cells was found to be TLR4-dependent, identifying TLR4 signalling as a key driver of CSPG-mediated immune modulation. These findings establish CSPGs as critical mediators of inflammation resolution failure after SCI in rodents, which leads to prolonged inflammatory pathology and irreversible tissue destruction.
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8
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Crapser JD, Arreola MA, Tsourmas KI, Green KN. Microglia as hackers of the matrix: sculpting synapses and the extracellular space. Cell Mol Immunol 2021; 18:2472-2488. [PMID: 34413489 PMCID: PMC8546068 DOI: 10.1038/s41423-021-00751-3] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/26/2021] [Indexed: 02/08/2023] Open
Abstract
Microglia shape the synaptic environment in health and disease, but synapses do not exist in a vacuum. Instead, pre- and postsynaptic terminals are surrounded by extracellular matrix (ECM), which together with glia comprise the four elements of the contemporary tetrapartite synapse model. While research in this area is still just beginning, accumulating evidence points toward a novel role for microglia in regulating the ECM during normal brain homeostasis, and such processes may, in turn, become dysfunctional in disease. As it relates to synapses, microglia are reported to modify the perisynaptic matrix, which is the diffuse matrix that surrounds dendritic and axonal terminals, as well as perineuronal nets (PNNs), specialized reticular formations of compact ECM that enwrap neuronal subsets and stabilize proximal synapses. The interconnected relationship between synapses and the ECM in which they are embedded suggests that alterations in one structure necessarily affect the dynamics of the other, and microglia may need to sculpt the matrix to modify the synapses within. Here, we provide an overview of the microglial regulation of synapses, perisynaptic matrix, and PNNs, propose candidate mechanisms by which these structures may be modified, and present the implications of such modifications in normal brain homeostasis and in disease.
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Affiliation(s)
- Joshua D. Crapser
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
| | - Miguel A. Arreola
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
| | - Kate I. Tsourmas
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
| | - Kim N. Green
- grid.266093.80000 0001 0668 7243Department of Neurobiology and Behavior, University of California, Irvine, CA USA
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Jin W, Zhang F, Linhardt RJ. Glycosaminoglycans in Neurodegenerative Diseases. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1325:189-204. [PMID: 34495536 DOI: 10.1007/978-3-030-70115-4_9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Glycosaminoglycans (GAGs) are linear polysaccharides that consist of alternating disaccharides sequences of uronic acids and/or galactose hexamino sugars most of which are sulfated. GAGs are ubiquitously expressed on the cell surface, in the intracellular milieu and in the extracellular matrix of all animal cells. Thus, GAGs exhibit many essential roles in a variety of physiological and pathological processes. The targets of GAGs are GAG-binding proteins and related proteins that are of significant interest to both the academic community and in the pharmaceutical industry. In this review, the structures of GAGs, their binding proteins, and analogs are presented that further the development of GAGs and their analogs for the treatment of neurodegenerative diseases agents.
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Affiliation(s)
- Weihua Jin
- College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou, China.,Department of Chemical and Biological Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY, USA
| | - Fuming Zhang
- Department of Chemical and Biological Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY, USA.
| | - Robert J Linhardt
- Department of Chemical and Biological Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY, USA. .,Department of Biological Science, Departments of Chemistry and Chemical Biology and Biomedical Engineering, Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY, USA.
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10
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Menezes R, Hashemi S, Vincent R, Collins G, Meyer J, Foston M, Arinzeh TL. Investigation of glycosaminoglycan mimetic scaffolds for neurite growth. Acta Biomater 2019; 90:169-178. [PMID: 30878449 DOI: 10.1016/j.actbio.2019.03.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 03/06/2019] [Accepted: 03/12/2019] [Indexed: 12/26/2022]
Abstract
Spinal cord injury can lead to severe dysfunction as a result of limited nerve regeneration that is due to an inhibitory environment created at the site of injury. Neural tissue engineering using materials that closely mimic the extracellular matrix (ECM) during neural development could enhance neural regeneration. Glycosaminoglycans (GAGs), which are sulfated polysaccharides, have been shown to modulate axonal outgrowth in neural tissue depending upon the position and degree of sulfation. Cellulose sulfate (CelS), which is a GAG mimetic, was evaluated for its use in promoting neurite extension. Aligned fibrous scaffolds containing gelatin blended with 0.25% partially sulfated cellulose sulfate (pCelS), having sulfate predominantly at the 6-carbon position of the glucose monomer unit, and fully sulfated cellulose sulfate (fCelS), which is sulfated at the 2-, 3-, and 6-carbon positions of the glucose monomer unit, were fabricated using the electrospinning method. Comparisons were made with scaffolds containing native GAGs, chondroitin sulfate-A (CS-A) and chondroitin sulfate-C (CS-C), which were obtained from commercial sources. CS-A and CS-C are present in neural tissue ECM. The degree of sulfation and position of sulfate groups was determined using elemental analysis, Fourier-transform infrared spectroscopy (FTIR), Raman microspectroscopy, and 13C nuclear magnetic resonance (NMR). In vitro studies examined both nerve growth factor (NGF) binding on scaffolds and neurite extension by dorsal root ganglion (DRG) neurons. NGF binding was highest on scaffolds containing pCelS and fCelS. Neurite extension was greatest for scaffolds containing fCelS followed by pCelS, with the lowest outgrowth on the CS-A containing scaffolds, suggesting that the degree and position of sulfation of CelS was permissible for neurite outgrowth. This study demonstrated that cellulose sulfate, as a GAG mimetic, could be used for future neural tissue regeneration application. STATEMENT OF SIGNFICANCE: Scaffolds that closely mimic the native extracellular matrix (ECM) during development may be a promising approach to enhance neural regeneration. Here, we reported a glycosaminoglycan (GAG) mimetic derived from cellulose that promotes neurite extension over native GAGs, chondroitin sulfate-A (CS-A) and chondroitin sulfate-C (CS-C), which are present in neural ECM. Depending upon the degree and position of sulfation, the GAG mimetic can impact nerve growth factor binding and permissive neurite outgrowth.
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11
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Warren PM, Alilain WJ. Plasticity Induced Recovery of Breathing Occurs at Chronic Stages after Cervical Contusion. J Neurotrauma 2019; 36:1985-1999. [PMID: 30565484 DOI: 10.1089/neu.2018.6186] [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] [Indexed: 01/21/2023] Open
Abstract
Severe midcervical contusion injury causes profound deficits throughout the respiratory motor system that last from acute to chronic time points post-injury. We use chondroitinase ABC (ChABC) to digest chondroitin sulphate proteoglycans within the extracellular matrix (ECM) surrounding the respiratory system at both acute and chronic time points post-injury to explore whether augmentation of plasticity can recover normal motor function. We demonstrate that, regardless of time post-injury or treatment application, the lesion cavity remains consistent, showing little regeneration or neuroprotection within our model. Through electromyography (EMG) recordings of multiple inspiratory muscles, however, we show that application of the enzyme at chronic time points post-injury initiates the recovery of normal breathing in previously paralyzed respiratory muscles. This reduced the need for compensatory activity throughout the motor system. Application of ChABC at acute time points recovered only modest amounts of respiratory function. To further understand this effect, we assessed the anatomical mechanism of this recovery. Increased EMG activity in previously paralyzed muscles was brought about by activation of spared bulbospinal pathways through the site of injury and/or sprouting of spared serotonergic fibers from the contralateral side of the cord. Accordingly, we demonstrate that alterations to the ECM and augmentation of plasticity at chronic time points post-cervical contusion can cause functional recovery of the respiratory motor system and reveal mechanistic evidence of the pathways that govern this effect.
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Affiliation(s)
- Philippa Mary Warren
- 1 Department of Neurosciences, MetroHealth Medical Centre, Case Western Reserve University, Cleveland, Ohio.,2 King's College London, Regeneration Group, The Wolfson Centre for Age-Related Diseases, Guy's Campus, London Bridge, London, United Kingdom
| | - Warren Joseph Alilain
- 1 Department of Neurosciences, MetroHealth Medical Centre, Case Western Reserve University, Cleveland, Ohio.,3 Department of Neuroscience, Spinal Cord and Brain Injury Research Centre, University of Kentucky, Lexington, Kentucky
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Anti-Chondroitin Sulfate Proteoglycan Strategies in Spinal Cord Injury: Temporal and Spatial Considerations Explain the Balance between Neuroplasticity and Neuroprotection. J Neurotrauma 2018. [DOI: 10.1089/neu.2018.5928] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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13
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Sarveazad A, Babahajian A, Bakhtiari M, Soleimani M, Behnam B, Yari A, Akbari A, Yousefifard M, Janzadeh A, Amini N, Agah S, Fallah A, Joghataei MT. The combined application of human adipose derived stem cells and Chondroitinase ABC in treatment of a spinal cord injury model. Neuropeptides 2017; 61:39-47. [PMID: 27484347 DOI: 10.1016/j.npep.2016.07.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/11/2016] [Revised: 07/10/2016] [Accepted: 07/10/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND Although stem cell therapy has become a major focus as a new option for management of spinal cord injury (SCI), its effectiveness should be promoted. In this study, we investigated the effects of co-administrating human adipose-derived stem cells (hADSCs) and Chondroitinase ABC (ChABC) in a rat model of spinal cord injury. MATERIAL AND METHODS hADSCs derived from superficial layer of abdominal adipose tissue were used to treat a contusion-induced SCI. Animals were randomly allocated to five equal groups including sham (only laminectomy), SCI (SCI+vehicle injection), hADSCs (1×10⁶ hADSCs/10μl intra-spinal injection), ChABC (10μl of 100U/ml ChABC intra-spinal injection injection), and hADSCs+ChABC. Basso, Beattie and Bresnahan tests were used to evaluate locomotor function. 8weeks after treatment, cavity size, myelination, cell differentiation (neuron and astrocyte), and chondroitin sulfate amount were analyzed. RESULTS hADSC transplanted animals, ChABC injected animals (P<0.001), and hADSC+ChABC treated rats (P<0.001) displayed significant motor improvement compared to SCI group. Combination therapy of hADSCs and ChABC led to greater locomotor recovery compared to using hADSCs (P<0.001) or ChABC (P<0.01) alone. Spinal cords in the combined and single therapy groups had cavities filled with myelinated areas and less chondroitin sulfate content in comparison with the control group (P<0.001). hADSCs expressed GFAP, B III tubulin and Map2. CONCLUSION Combination therapy with ChABC and hADSCs exhibits more significant functional recovery than single therapy using either. This result may be applicable in selection of the best therapeutic strategy for SCI.
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Affiliation(s)
- Arash Sarveazad
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran; Cellular and Molecular Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Asrin Babahajian
- Liver & Digestive Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran
| | - Mehrdad Bakhtiari
- Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Mansoureh Soleimani
- Cellular and Molecular Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran; Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Babak Behnam
- Department of Medical Genetics and Molecular Biology, Iran University of Medical Sciences (IUMS), Tehran, Iran; NIH Undiagnosed Diseases Program, Common Fund, Office of the Director, NIH, Bethesda, Maryland, USA Office of the Clinical Director, NHGRI, National Institutes of Health, Bethesda, MD, USA
| | - Abazar Yari
- Department of Anatomy, Faculty of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | - Abolfazl Akbari
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mahmoud Yousefifard
- Physiology Research Center and Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Atousa Janzadeh
- Physiology Research Center and Department of Physiology, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Naser Amini
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahram Agah
- Colorectal Research Center, Iran University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Taghi Joghataei
- Cellular and Molecular Research Center, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran; Department of Anatomy, Faculty of Medicine, Iran University of Medical Sciences, Tehran, Iran.
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14
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Carwardine D, Wong LF, Fawcett JW, Muir EM, Granger N. Canine olfactory ensheathing cells from the olfactory mucosa can be engineered to produce active chondroitinase ABC. J Neurol Sci 2016; 367:311-8. [PMID: 27423610 DOI: 10.1016/j.jns.2016.06.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 11/26/2022]
Abstract
A multitude of factors must be overcome following spinal cord injury (SCI) in order to achieve clinical improvement in patients. It is thought that by combining promising therapies these diverse factors could be combatted with the aim of producing an overall improvement in function. Chondroitin sulphate proteoglycans (CSPGs) present in the glial scar that forms following SCI present a significant block to axon regeneration. Digestion of CSPGs by chondroitinase ABC (ChABC) leads to axon regeneration, neuronal plasticity and functional improvement in preclinical models of SCI. However, the enzyme activity decays at body temperature within 24-72h, limiting the translational potential of ChABC as a therapy. Olfactory ensheathing cells (OECs) have shown huge promise as a cell transplant therapy in SCI. Their beneficial effects have been demonstrated in multiple small animal SCI models as well as in naturally occurring SCI in canine patients. In the present study, we have genetically modified canine OECs from the mucosa to constitutively produce enzymatically active ChABC. We have developed a lentiviral vector that can deliver a mammalian modified version of the ChABC gene to mammalian cells, including OECs. Enzyme production was quantified using the Morgan-Elson assay that detects the breakdown products of CSPG digestion in cell supernatants. We confirmed our findings by immunolabelling cell supernatant samples using Western blotting. OECs normal cell function was unaffected by genetic modification as demonstrated by normal microscopic morphology and the presence of the low affinity neurotrophin receptor (p75(NGF)) following viral transduction. We have developed the means to allow production of active ChABC in combination with a promising cell transplant therapy for SCI repair.
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Affiliation(s)
- Darren Carwardine
- University of Bristol, School of Veterinary Sciences, Regenerative Medicine Laboratory, Biomedical Science Building, University Walk, Bristol BS8 1TD, United Kingdom.
| | - Liang-Fong Wong
- University of Bristol, School of Clinical Sciences, Regenerative Medicine Laboratory, Biomedical Science Building, University Walk, Bristol BS8 1TD, United Kingdom.
| | - James W Fawcett
- University of Cambridge, Department of Clinical Neurosciences, Cambridge Centre for Brain Repair, E.D. Adrian Building, Forvie Site, Robinson Way, Cambridge CB2 0PY, United Kingdom.
| | - Elizabeth M Muir
- University of Cambridge, Department of Physiology Development and Neuroscience, Anatomy Building, Downing St, Cambridge CB2 3DY, United Kingdom.
| | - Nicolas Granger
- University of Bristol, School of Veterinary Sciences, Langford House, Langford, North Somerset BS40 5DU, United Kingdom.
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15
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Rost S, Akyüz N, Martinovic T, Huckhagel T, Jakovcevski I, Schachner M. Germline ablation of dermatan-4O-sulfotransferase1 reduces regeneration after mouse spinal cord injury. Neuroscience 2016; 312:74-85. [PMID: 26586562 DOI: 10.1016/j.neuroscience.2015.11.013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 11/02/2015] [Accepted: 11/06/2015] [Indexed: 02/05/2023]
Abstract
Chondroitin/dermatan sulfate proteoglycans (CSPGs/DSPGs) are major components of the extracellular matrix. Their expression is generally upregulated after injuries to the adult mammalian central nervous system, which is known for its low ability to restore function after injury. Several studies support the view that CSPGs inhibit regeneration after injury, whereas the functions of DSPGs in injury paradigms are less certain. To characterize the functions of DSPGs in the presence of CSPGs, we studied young adult dermatan-4O-sulfotransferase1-deficient (Chst14(-/-)) mice, which express chondroitin sulfates (CSs), but not dermatan sulfates (DSs), to characterize the functional outcome after severe compression injury of the spinal cord. In comparison to their wild-type (Chst14(+/+)) littermates, regeneration was reduced in Chst14(-/-) mice. No differences between genotypes were seen in the size of spinal cords, numbers of microglia and astrocytes neither in intact nor injured spinal cords after injury. Monoaminergic innervation and re-innervation of the spinal cord caudal to the lesion site as well as expression levels of glial fibrillary acidic protein (GFAP) and myelin basic protein (MBP) were similar in both genotypes, independent of whether they were injured and examined 6weeks after injury or not injured. These results suggest that, in contrast to CSPGs, DSPGs, being the products of Chst14 enzymatic activity, promote regeneration after injury of the adult mouse central nervous system.
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Affiliation(s)
- S Rost
- Center for Molecular Neurobiology Hamburg, University Hospital Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - N Akyüz
- Center for Molecular Neurobiology Hamburg, University Hospital Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - T Martinovic
- Center for Molecular Neurobiology Hamburg, University Hospital Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany; Institute of Histology and Embryology, School of Medicine, University of Belgrade, Višegradska 26, Belgrade, Serbia
| | - T Huckhagel
- Center for Molecular Neurobiology Hamburg, University Hospital Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - I Jakovcevski
- Center for Molecular Neurobiology Hamburg, University Hospital Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany; Experimental Neurophysiology, University Hospital Cologne, Joseph-Stelzmann-Str. 9, D-50931 Köln, Germany; German Center for Neurodegenerative Diseases, Ludwig-Erhard-Allee 2, D-53175 Bonn, Germany.
| | - M Schachner
- Center for Molecular Neurobiology Hamburg, University Hospital Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany; Center for Neuroscience, Shantou University Medical College, 22 Xin Ling Road, Shantou, Guangdong 515041, PR China; Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, 604 Allison Road, Piscataway, NJ 08854, USA.
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16
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Rolón-Reyes K, Kucheryavykh YV, Cubano LA, Inyushin M, Skatchkov SN, Eaton MJ, Harrison JK, Kucheryavykh LY. Microglia Activate Migration of Glioma Cells through a Pyk2 Intracellular Pathway. PLoS One 2015; 10:e0131059. [PMID: 26098895 PMCID: PMC4476590 DOI: 10.1371/journal.pone.0131059] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2015] [Accepted: 05/27/2015] [Indexed: 01/03/2023] Open
Abstract
Glioblastoma is one of the most aggressive and fatal brain cancers due to the highly invasive nature of glioma cells. Microglia infiltrate most glioma tumors and, therefore, make up an important component of the glioma microenvironment. In the tumor environment, microglia release factors that lead to the degradation of the extracellular matrix and stimulate signaling pathways to promote glioma cell invasion. In the present study, we demonstrated that microglia can promote glioma migration through a mechanism independent of extracellular matrix degradation. Using western blot analysis, we found upregulation of proline rich tyrosine kinase 2 (Pyk2) protein phosphorylated at Tyr579/580 in glioma cells treated with microglia conditioned medium. This upregulation occurred in rodent C6 and GL261 as well as in human glioma cell lines with varying levels of invasiveness (U-87MG, A172, and HS683). siRNA knock-down of Pyk2 protein and pharmacological blockade by the Pyk2/focal-adhesion kinase (FAK) inhibitor PF-562,271 reversed the stimulatory effect of microglia on glioma migration in all cell lines. A lower concentration of PF-562,271 that selectively inhibits FAK, but not Pyk2, did not have any effect on glioma cell migration. Moreover, with the use of the CD11b-HSVTK microglia ablation mouse model we demonstrated that elimination of microglia in the implanted tumors (GL261 glioma cells were used for brain implantation) by the local in-tumor administration of Ganciclovir, significantly reduced the phosphorylation of Pyk2 at Tyr579/580 in implanted tumor cells. Taken together, these data indicate that microglial cells activate glioma cell migration/dispersal through the pro-migratory Pyk2 signaling pathway in glioma cells.
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Affiliation(s)
- Kimberleve Rolón-Reyes
- Department of Biochemistry, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
| | - Yuriy V. Kucheryavykh
- Department of Biochemistry, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
| | - Luis A. Cubano
- Department of Anatomy and Cell Biology, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
| | - Mikhail Inyushin
- Department of Physiology, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
| | - Serguei N. Skatchkov
- Department of Biochemistry, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
- Department of Physiology, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
| | - Misty J. Eaton
- Department of Biochemistry, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
| | - Jeffrey K. Harrison
- Department of Pharmacology and Therapeutics, College of Medicine, University of Florida, Gainesville, Florida
| | - Lilia Y. Kucheryavykh
- Department of Biochemistry, Universidad Central del Caribe, School of Medicine, Bayamón, Puerto Rico, United States of America
- * E-mail:
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17
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Chondroitin Sulfate Induces Depression of Synaptic Transmission and Modulation of Neuronal Plasticity in Rat Hippocampal Slices. Neural Plast 2015; 2015:463854. [PMID: 26075099 PMCID: PMC4444577 DOI: 10.1155/2015/463854] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2015] [Revised: 04/18/2015] [Accepted: 04/22/2015] [Indexed: 12/13/2022] Open
Abstract
It is currently known that in CNS the extracellular matrix is involved in synaptic stabilization and limitation of synaptic plasticity. However, it has been reported that the treatment with chondroitinase following injury allows the formation of new synapses and increased plasticity and functional recovery. So, we hypothesize that some components of extracellular matrix may modulate synaptic transmission. To test this hypothesis we evaluated the effects of chondroitin sulphate (CS) on excitatory synaptic transmission, cellular excitability, and neuronal plasticity using extracellular recordings in the CA1 area of rat hippocampal slices. CS caused a reversible depression of evoked field excitatory postsynaptic potentials in a concentration-dependent manner. CS also reduced the population spike amplitude evoked after orthodromic stimulation but not when the population spikes were antidromically evoked; in this last case a potentiation was observed. CS also enhanced paired-pulse facilitation and long-term potentiation. Our study provides evidence that CS, a major component of the brain perineuronal net and extracellular matrix, has a function beyond the structural one, namely, the modulation of synaptic transmission and neuronal plasticity in the hippocampus.
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18
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Dyck SM, Karimi-Abdolrezaee S. Chondroitin sulfate proteoglycans: Key modulators in the developing and pathologic central nervous system. Exp Neurol 2015; 269:169-87. [PMID: 25900055 DOI: 10.1016/j.expneurol.2015.04.006] [Citation(s) in RCA: 123] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 04/11/2015] [Accepted: 04/14/2015] [Indexed: 12/15/2022]
Abstract
Chondroitin Sulfate Proteoglycans (CSPGs) are a major component of the extracellular matrix in the central nervous system (CNS) and play critical role in the development and pathophysiology of the brain and spinal cord. Developmentally, CSPGs provide guidance cues for growth cones and contribute to the formation of neuronal boundaries in the developing CNS. Their presence in perineuronal nets plays a crucial role in the maturation of synapses and closure of critical periods by limiting synaptic plasticity. Following injury to the CNS, CSPGs are dramatically upregulated by reactive glia which form a glial scar around the lesion site. Increased level of CSPGs is a hallmark of all CNS injuries and has been shown to limit axonal plasticity, regeneration, remyelination, and conduction after injury. Additionally, CSPGs create a non-permissive milieu for cell replacement activities by limiting cell migration, survival and differentiation. Mounting evidence is currently shedding light on the potential benefits of manipulating CSPGs in combination with other therapeutic strategies to promote spinal cord repair and regeneration. Moreover, the recent discovery of multiple receptors for CSPGs provides new therapeutic targets for targeted interventions in blocking the inhibitory properties of CSPGs following injury. Here, we will provide an in depth discussion on the impact of CSPGs in normal and pathological CNS. We will also review the recent preclinical therapies that have been developed to target CSPGs in the injured CNS.
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Affiliation(s)
- Scott M Dyck
- Regenerative Medicine Program, Department of Physiology and the Spinal Cord Research Centre, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Soheila Karimi-Abdolrezaee
- Regenerative Medicine Program, Department of Physiology and the Spinal Cord Research Centre, University of Manitoba, Winnipeg, Manitoba, Canada.
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19
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Gause Ii TM, Sivak WN, Marra KG. The role of chondroitinase as an adjuvant to peripheral nerve repair. Cells Tissues Organs 2015; 200:59-68. [PMID: 25766067 DOI: 10.1159/000369449] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/28/2014] [Indexed: 11/19/2022] Open
Abstract
Chondroitin sulfate proteoglycans (CSPGs) are potent inhibitors of neural regeneration in the peripheral nervous system. Following nerve injury, inhibitory CSPGs accumulate within the endoneurium and Schwann cell basal lamina of the distal nerve stump. The utilization of chondroitinase ABC (chABC) has led to a marked increase in the ability of injured axons to regenerate across gaps through the CSPG-laden extracellular matrix. Experimental models have repeatedly shown chABC to be capable of degrading the CSPGs that hinder neurite outgrowth. In this article, the characterization of CSPGs, their upregulation following peripheral nerve injury, and potential mechanisms behind their growth and inhibition are described. To date, the literature supports that the adjunct use of chABC may be beneficial to peripheral nerve repair in digesting inhibitory CSPGs. chABC has also shown some indication of synergism with other therapies, such as stem cell transplantation. Evidence supporting the use of chondroitinase as a treatment modality in nerve repair, either alone or in combination with other agents, is reviewed within. Finally, several shortcomings of chABC are addressed, notably its thermal stability and physiologic longevity - both hindering its widespread clinical adoption. Future studies are warranted in order to optimize the therapeutic benefits of the chondroitinase enzyme.
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20
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Effects of Chondroitin Sulfate and Its Oligosaccharides on Toll-Like Receptor-Mediated IL-6 Secretion by Macrophage-Like J774.1 Cells. Biosci Biotechnol Biochem 2014; 75:1283-9. [DOI: 10.1271/bbb.110055] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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21
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Raposo C, Schwartz M. Glial scar and immune cell involvement in tissue remodeling and repair following acute CNS injuries. Glia 2014; 62:1895-904. [PMID: 24756949 DOI: 10.1002/glia.22676] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 03/30/2014] [Accepted: 04/01/2014] [Indexed: 12/17/2022]
Abstract
Inadequate axonal regeneration is a common phenomenon occurring following acute injury to the central nervous system (CNS), and is often associated with permanent neurological deficits. The injured axons attempting to regenerate face the inhospitable environment of the CNS scar, which can hinder axonal growth and sprouting. In addition, in response to the insult, intense activation and infiltration of immune cells take place. Both the scar tissue and immune response, which have received a bad reputation in the context of CNS repair are essential for the overall recovery from CNS injuries, but are not optimally controlled. The glial scar contributes to protection of the spared neural tissues by establishing a boundary between damaged and salvageable tissue, and by educating the immune cells to promote the healing of the CNS tissue. In turn, the immune cells, and in particular the infiltrating macrophages, exert several functions at the lesion site, including resolution of the microglial response, control of scar tissue degradation, and production of growth factors; thereby, promoting neuronal survival, axonal regeneration, and tissue remodeling. As axonal regeneration and tissue remodeling are viewed as critical steps for the overall functional recovery following CNS injury, a detailed understanding of the mechanisms underlying the timely formation and degradation of the CNS scar, and its crosstalk with the inflammatory response, are of great importance, both biologically and clinically.
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Affiliation(s)
- Catarina Raposo
- Department of Neurobiology, Weizmann Institute of Science, Rehovot, Israel
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22
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Egea J, Parada E, Gómez-Rangel V, Buendia I, Negredo P, Montell E, Ruhí R, Vergés J, Roda J, García A, López M. Small synthetic hyaluronan disaccharides afford neuroprotection in brain ischemia-related models. Neuroscience 2014; 265:313-22. [DOI: 10.1016/j.neuroscience.2014.01.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 01/16/2014] [Accepted: 01/17/2014] [Indexed: 11/24/2022]
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23
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Warren PM, Alilain WJ. The challenges of respiratory motor system recovery following cervical spinal cord injury. PROGRESS IN BRAIN RESEARCH 2014; 212:173-220. [DOI: 10.1016/b978-0-444-63488-7.00010-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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24
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Combination treatment with chondroitinase ABC in spinal cord injury--breaking the barrier. Neurosci Bull 2013; 29:477-83. [PMID: 23839053 DOI: 10.1007/s12264-013-1359-2] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Accepted: 05/19/2013] [Indexed: 12/18/2022] Open
Abstract
After spinal cord injury (SCI), re-establishing functional circuitry in the damaged central nervous system (CNS) faces multiple challenges including lost tissue volume, insufficient intrinsic growth capacity of adult neurons, and the inhibitory environment in the damaged CNS. Several treatment strategies have been developed over the past three decades, but successful restoration of sensory and motor functions will probably require a combination of approaches to address different aspects of the problem. Degradation of the chondroitin sulfate proteoglycans with the chondroitinase ABC (ChABC) enzyme removes a regeneration barrier from the glial scar and increases plasticity in the CNS by removing perineuronal nets. its mechanism of action does not clash or overlap with most of the other treatment strategies, making ChABC an attractive candidate as a combinational partner with other methods. in this article, we review studies in rat SCI models using ChABC combined with other treatments including cell implantation, growth factors, myelin-inhibitory molecule blockers, and ion channel expression. We discuss possible ways to optimize treatment protocols for future combinational studies. To date, combinational therapies with ChABC have shown synergistic effects with several other strategies in enhancing functional recovery after SCI. These combinatorial approaches can now be developed for clinical application.
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25
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Maroto M, Fernández-Morales JC, Padín JF, González JC, Hernández-Guijo JM, Montell E, Vergés J, de Diego AMG, García AG. Chondroitin sulfate, a major component of the perineuronal net, elicits inward currents, cell depolarization, and calcium transients by acting on AMPA and kainate receptors of hippocampal neurons. J Neurochem 2013; 125:205-13. [PMID: 23350646 DOI: 10.1111/jnc.12159] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 10/08/2012] [Accepted: 01/15/2013] [Indexed: 12/19/2022]
Abstract
Chondroitin sulfate (CS) proteoglycans (CSPGs) are the most abundant PGs of the brain extracellular matrix (ECM). Free CS could be released during ECM degradation and exert physiological functions; thus, we aimed to investigate the effects of CS on voltage- and current-clamped rat embryo hippocampal neurons in primary cultures. We found that CS elicited a whole-cell Na(+)-dependent inward current (ICS) that produced drastic cell depolarization, and a cytosolic calcium transient ([Ca(2+)]c). Those effects were similar to those elicited by α-amino-3-hydroxy-5-methylisoxazole-4-propionate (AMPA) and kainate, were completely blocked by NBQX and CNQX, were partially blocked by GYKI, and were unaffected by MK801 and D-APV. Furthermore, ICS and AMPA currents were similarly potentiated by cyclothiazide, a positive allosteric modulator of AMPA receptors. Because CSPGs have been attributed Ca(2) (+) -dependent roles, such as neural network development, axon pathfinding, plasticity and regeneration after CNS injury, CS action after ECM degradation could be contributing to the mediation of these effects through its interaction with AMPA and kainate receptors.
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Affiliation(s)
- Marcos Maroto
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - José-Carlos Fernández-Morales
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Juan Fernando Padín
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - José C González
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Jesús M Hernández-Guijo
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Eulalia Montell
- Pre-Clinical R&D Area, Pharmascience Division, Bioibérica, Barcelona, Spain
| | - Josep Vergés
- Pre-Clinical R&D Area, Pharmascience Division, Bioibérica, Barcelona, Spain
| | - Antonio M G de Diego
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Antonio G García
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Departamento de Farmacología y Terapéutica, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain.,Instituto de Investigación Sanitaria, Servicio de Farmacología Clínica, Hospital Universitario de la Princesa. Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
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26
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Kilcoyne M, Sharma S, McDevitt N, O'Leary C, Joshi L, McMahon SS. Neuronal glycosylation differentials in normal, injured and chondroitinase-treated environments. Biochem Biophys Res Commun 2012; 420:616-22. [PMID: 22465128 DOI: 10.1016/j.bbrc.2012.03.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Accepted: 03/12/2012] [Indexed: 12/27/2022]
Abstract
Glycosylation is found ubiquitously throughout the central nervous system (CNS). Chondroitin sulphate proteoglycans (CSPGs) are a group of molecules heavily substituted with glycosaminoglycans (GAGs) and are found in the extracellular matrix (ECM) and cell surfaces. Upon CNS injury, a glial scar is formed, which is inhibitory for axon regeneration. Several CSPGs are up-regulated within the glial scar, including NG2, and these CSPGs are key inhibitory molecules of axonal regeneration. Treatment with chondroitinase ABC (ChABC) can neutralise the inhibitory nature of NG2. A gene expression dataset was mined in silico to verify differentially regulated glycosylation-related genes in neurons after spinal cord injury and identify potential targets for further investigation. To establish the glycosylation differential of neurons that grow in a healthy, inhibitory and ChABC-treated environment, we established an indirect co-culture system where PC12 neurons were grown with primary astrocytes, Neu7 astrocytes (which overexpress NG2) and Neu7 astrocytes treated with ChABC. After 1, 4 and 8 days culture, lectin cytochemistry of the neurons was performed using five fluorescently-labelled lectins (ECA MAA, PNA, SNA-I and WFA). Usually α-(2,6)-linked sialylation scarcely occurs in the CNS but this motif was observed on the neurons in the injured environment only at day 8. Treatment with ChABC was successful in returning neuronal glycosylation to normal conditions at all timepoints for MAA, PNA and SNA-I staining, and by day 8 in the case of WFA. This study demonstrated neuronal cell surface glycosylation changes in an inhibitory environment and indicated a return to normal glycosylation after treatment with ChABC, which may be promising for identifying potential therapies for neuronal regeneration strategies.
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Affiliation(s)
- Michelle Kilcoyne
- Glycoscience Group, National Centre for Biomedical Engineering Science, National University of Ireland, Galway, Ireland
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Microglial carbohydrate-binding receptors for neural repair. Cell Tissue Res 2012; 349:215-27. [DOI: 10.1007/s00441-012-1342-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2011] [Accepted: 01/25/2012] [Indexed: 01/04/2023]
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Kwok JC, Dick G, Wang D, Fawcett JW. Extracellular matrix and perineuronal nets in CNS repair. Dev Neurobiol 2011; 71:1073-89. [DOI: 10.1002/dneu.20974] [Citation(s) in RCA: 303] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Mortazavi MM, Verma K, Deep A, Esfahani FB, Pritchard PR, Tubbs RS, Theodore N. Chemical priming for spinal cord injury: a review of the literature part II-potential therapeutics. Childs Nerv Syst 2011; 27:1307-16. [PMID: 21174102 DOI: 10.1007/s00381-010-1365-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 12/07/2010] [Indexed: 01/07/2023]
Abstract
INTRODUCTION Spinal cord injury is a complex cascade of reactions secondary to the initial mechanical trauma that puts into action the innate properties of the injured cells, the circulatory, inflammatory, and chemical status around them, into a non-permissive and destructive environment for neuronal function and regeneration. Priming means putting a cell, in a state of "arousal" towards better function. Priming can be mechanical as trauma is known to enhance activity in cells. MATERIALS AND METHODS A comprehensive review of the literature was performed to better understand the possible chemical primers used for spinal cord injuries. CONCLUSIONS Taken together, many studies have shown various promising results using the substances outlined herein for treating SCI.
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Affiliation(s)
- Martin M Mortazavi
- Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AR, USA
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Mortazavi MM, Verma K, Deep A, Esfahani FB, Pritchard PR, Tubbs RS, Theodore N. Chemical priming for spinal cord injury: a review of the literature. Part I-factors involved. Childs Nerv Syst 2011; 27:1297-306. [PMID: 21170536 DOI: 10.1007/s00381-010-1364-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Accepted: 12/07/2010] [Indexed: 12/29/2022]
Abstract
INTRODUCTION There are significant differences between the propensity of neural regeneration between the central and peripheral nervous systems. MATERIALS AND METHODS Following a review of the literature, we describe the role of growth factors, guiding factors, and neurite outgrowth inhibitors in the physiology and development of the nervous system as well as the pathophysiology of the spinal cord. We also detail their therapeutic role as well as those of other chemical substances that have recently been found to modify regrowth following cord injury. CONCLUSIONS Multiple factors appear to have promising futures for the possibility of improving spinal cord injury following injury.
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Affiliation(s)
- Martin M Mortazavi
- Department of Neurosurgery, Barrow Neurological Institute, Phoenix, AR, USA
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Karumbaiah L, Anand S, Thazhath R, Zhong Y, McKeon RJ, Bellamkonda RV. Targeted downregulation of N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase significantly mitigates chondroitin sulfate proteoglycan-mediated inhibition. Glia 2011; 59:981-96. [PMID: 21456043 DOI: 10.1002/glia.21170] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2010] [Accepted: 02/23/2011] [Indexed: 01/17/2023]
Abstract
Chondroitin sulfate-4,6 (CS-E) glycosaminoglycan (GAG) upregulation in astroglial scars is a major contributor to chondroitin sulfate proteoglycan (CSPG)-mediated inhibition [Gilbert et al. (2005) Mol Cell Neurosci 29:545–558]. However, the role of N-acetylgalactosamine 4-sulfate 6-O-sulfotransferase (GalNAc4S6ST) catalyzed sulfation of CS-E, and its contribution to CSPG-mediated inhibition of CNS regeneration remains to be fully elucidated. Here, we used in situ hybridization to show localized upregulation of GalNAc4S6ST mRNA after CNS injury. Using in vitro spot assays with immobilized CS-E, we demonstrate dose-dependent inhibition of rat embryonic day 18 (E18) cortical neurons. To determine whether selective downregulation of CS-E affected the overall inhibitory character of extracellular matrix produced by reactive astrocytes, single [against (chondroitin 4) sulfotransferase 11 (C4ST1) or GalNAc4S6ST mRNA] or double [against C4ST1 and GalNAc4S6ST mRNA] siRNA treatments were conducted and assayed using quantitative real-time polymerase chain reaction and high-performance liquid chromatography to confirm the specific downregulation of CS-4S GAG (CS-A) and CS-E. Spot and Bonhoeffer stripe assays using astrocyte-conditioned media from siRNA-treated rat astrocytes showed a significant decrease in inhibition of neuronal attachment and neurite extensions when compared with untreated and TGF-treated astrocytes. These findings reveal that selective attenuation of CS-E via siRNA targeting of GalNAc4S6ST significantly mitigates CSPG-mediated inhibition of neurons, potentially offering a novel intervention strategy for CNS injury.
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Affiliation(s)
- Lohitash Karumbaiah
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University School of Medicine, Atlanta, Georgia, USA
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Martín-de-Saavedra MD, del Barrio L, Cañas N, Egea J, Lorrio S, Montell E, Vergés J, García AG, López MG. Chondroitin sulfate reduces cell death of rat hippocampal slices subjected to oxygen and glucose deprivation by inhibiting p38, NFκB and iNOS. Neurochem Int 2011; 58:676-83. [PMID: 21335047 DOI: 10.1016/j.neuint.2011.02.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 02/03/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
Abstract
The glycosaminoglycan chondroitin sulfate (CS) is a major constituent of the extracellular matrix of the central nervous system where it can constitute part of the perineuronal nets. Constituents of the perineuronal nets are gaining interest because they have modulatory actions on their neighbouring neurons. In this study we have investigated if CS could afford protection in an acute in vitro ischemia/reoxygenation model by using isolated hippocampal slices subjected to 60min oxygen and glucose deprivation (OGD) followed by 120min reoxygenation (OGD/Reox). In this toxicity model, CS afforded protection of rat hippocampal slices measured as a reduction of lactate dehydrogenase (LDH) release; maximum protection (70% reduction of LDH) was obtained at the concentration of 3mM. To evaluate the intracellular signaling pathways implicated in the protective effect of CS, we first analysed the participation of the mitogen-activated protein kinases (MAPKs) p38 and ERK1/2 by western blot. OGD/Reox induced the phosphorylation of p38 and dephosphorylation of ERK1/2; however, CS only inhibited p38 but had no effect on ERK1/2. Furthermore, OGD/Reox-induced translocation of p65 to the nucleus was prevented in CS treated hippocampal slices. Finally, CS inhibited iNOS induction caused by OGD/Reox and thereby nitric oxide (NO) production measured as a reduction in DAF-2 DA fluorescence. In conclusion, the protective effect of CS in hippocampal slices subjected to OGD/Reox can be related to a modulatory action of the local immune response by a mechanism that implies inhibition of p38, NFκB, iNOS and the production of NO.
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Zhou J, Nagarkatti P, Zhong Y, Nagarkatti M. Immune modulation by chondroitin sulfate and its degraded disaccharide product in the development of an experimental model of multiple sclerosis. J Neuroimmunol 2010; 223:55-64. [PMID: 20434781 DOI: 10.1016/j.jneuroim.2010.04.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 03/12/2010] [Accepted: 04/01/2010] [Indexed: 11/28/2022]
Abstract
Clinical symptoms in MOG-induced EAE mice significantly exacerbated following chondroitin sulfate A (CS-A) injection, whereas administration of a degraded product, CSPG-DS, caused dramatic inhibition of EAE development. Also, administration of CSPG-DS but not CS-A, after the onset of clinical symptoms of EAE, was able to suppress the disease. Further studies demonstrated that CS-A up-regulated STAT4 expression and thus, induced IFN-gamma production and Th1 CD4 T cell differentiation. CS-A also up-regulated STAT3 and IL-23 expression and thus increased IL-17 producing T cells. CSPG-DS treatment both in vivo and in vitro decreased TNFalpha production from splenocytes. In vitro and in vivo studies indicated that CSPG-DS treatment in EAE mice significantly blocked migration of lymphocytes, whereas CS-A treatment increased lymphocyte infiltration in the brain.
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Affiliation(s)
- Juhua Zhou
- Department of Pathology, Microbiology and Immunology, School of Medicine, University of South Carolina, Columbia, SC 29209, USA
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Manipulating the glial scar: chondroitinase ABC as a therapy for spinal cord injury. Brain Res Bull 2010; 84:306-16. [PMID: 20620201 DOI: 10.1016/j.brainresbull.2010.06.015] [Citation(s) in RCA: 213] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2010] [Revised: 06/25/2010] [Accepted: 06/30/2010] [Indexed: 12/30/2022]
Abstract
Chondroitin sulphate proteoglycans (CSPGs) are potent inhibitors of growth in the adult CNS. Use of the enzyme chondroitinase ABC (ChABC) as a strategy to reduce CSPG inhibition in experimental models of spinal cord injury has led to observations of a remarkable capacity for repair. Here we review the evidence that treatment with ChABC, either as an individual therapy or in combination with other strategies, can have multiple beneficial effects on promoting repair following spinal cord injury. These include promoting regeneration of injured axons, plasticity of uninjured pathways and neuroprotection of injured projection neurons. More importantly, ChABC therapy has been demonstrated to promote significant recovery of function to spinal injured animals. Thus, there is robust pre-clinical evidence demonstrating beneficial effects of ChABC treatment following spinal cord injury. Furthermore, these effects have been replicated in a number of different injury models, with independent confirmation by different laboratories, providing an important validation of ChABC as a promising therapeutic strategy. We discuss putative mechanisms underlying ChABC-mediated repair as well as potential issues and considerations in translating ChABC treatment into a clinical therapy for spinal cord injury.
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Schiraldi C, Cimini D, De Rosa M. Production of chondroitin sulfate and chondroitin. Appl Microbiol Biotechnol 2010; 87:1209-20. [DOI: 10.1007/s00253-010-2677-1] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2010] [Revised: 05/07/2010] [Accepted: 05/07/2010] [Indexed: 10/19/2022]
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Egea J, García AG, Verges J, Montell E, López MG. Antioxidant, antiinflammatory and neuroprotective actions of chondroitin sulfate and proteoglycans. Osteoarthritis Cartilage 2010; 18 Suppl 1:S24-7. [PMID: 20399898 DOI: 10.1016/j.joca.2010.01.016] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2009] [Revised: 12/23/2009] [Accepted: 01/08/2010] [Indexed: 02/02/2023]
Abstract
The antiinflammatory and antiapoptotic effects of chondroitin sulfate (CS) are being used to treat osteoarthritis. Recent evidence has revealed that those peripheral effects of CS may also have therapeutic interest in diseases of the central nervous system (CNS). We review here such evidence. Perineuronal nets (PNNs) formed by chondroitin sulfate proteoglycans (CSPGs) may have a neuroprotective action against oxidative stress potentially involved in neurodegeneration. On the other hand, in human neuroblastoma SH-SY5Y cells CS has antioxidant and neuroprotective effects by activating the signaling pathway PKC/PI3K/Akt and inducing the antioxidant enzyme hemoxygenase-1. Consistent with this is the observation that protein kinase C (PKC) blockade overcomes inhibition of neurite outgrowth elicited by CSPGs. In addition, CS protects cortical neurons against excytotoxic death by phosphorylation of intracellular signals and the suppression of caspase-3 activation. Of interest is the finding that a disaccharide derived from CSPG degradation (CSGP-DS) protects neurons against toxicity both in vitro and in vivo. Furthermore, CSGP-DS efficiently protects against neuronal loss in experimental autoimmune encephalomyelitis and uveitis, decreases secretion of tumor necrosis factor-alpha (TNF-alpha) and block necrosis factor kappa B (NF-kappaB) translocation. In conclusion, CS may have neuroprotective properties linked to its antioxidant and antiinflammatory effects.
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Affiliation(s)
- J Egea
- Instituto Teófilo Hernando, Facultad de Medicina, Universidad Autónoma de Madrid, Spain
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38
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Ariga T, Miyatake T, Yu RK. Role of proteoglycans and glycosaminoglycans in the pathogenesis of Alzheimer's disease and related disorders: Amyloidogenesis and therapeutic strategies-A review. J Neurosci Res 2010; 88:2303-15. [DOI: 10.1002/jnr.22393] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Sustained delivery of thermostabilized chABC enhances axonal sprouting and functional recovery after spinal cord injury. Proc Natl Acad Sci U S A 2009; 107:3340-5. [PMID: 19884507 DOI: 10.1073/pnas.0905437106] [Citation(s) in RCA: 224] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Chondroitin sulfate proteoglycans (CSPGs) are a major class of axon growth inhibitors that are up-regulated after spinal cord injury (SCI) and contribute to regenerative failure. Chondroitinase ABC (chABC) digests glycosaminoglycan chains on CSPGs and can thereby overcome CSPG-mediated inhibition. But chABC loses its enzymatic activity rapidly at 37 degrees C, necessitating the use of repeated injections or local infusions for a period of days to weeks. These infusion systems are invasive, infection-prone, and clinically problematic. To overcome this limitation, we have thermostabilized chABC and developed a system for its sustained local delivery in vivo, obviating the need for chronically implanted catheters and pumps. Thermostabilized chABC remained active at 37 degrees C in vitro for up to 4 weeks. CSPG levels remained low in vivo up to 6 weeks post-SCI when thermostabilized chABC was delivered by a hydrogel-microtube scaffold system. Axonal growth and functional recovery following the sustained local release of thermostabilized chABC versus a single treatment of unstabilized chABC demonstrated significant differences in CSPG digestion. Animals treated with thermostabilized chABC in combination with sustained neurotrophin-3 delivery showed significant improvement in locomotor function and enhanced growth of cholera toxin B subunit-positive sensory axons and sprouting of serotonergic fibers. Therefore, improving chABC thermostability facilitates minimally invasive, sustained, local delivery of chABC that is potentially effective in overcoming CSPG-mediated regenerative failure. Combination therapy with thermostabilized chABC with neurotrophic factors enhances axonal regrowth, sprouting, and functional recovery after SCI.
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Kurkowska-Jastrzebska I, Zaremba M, Członkowska A, Oderfeld-Nowak B. Down-regulation of microglia and NG2-positive cells reaction in trimethyltin-injured hippocampus of rats treated with myelin basic protein-reactive T cells: possible contribution to the neuroprotective effect of T cells. J Neurosci Res 2009; 88:24-32. [PMID: 19610113 DOI: 10.1002/jnr.22187] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
In our previous investigations, we demonstrated that CD4(+) antimyelin basic protein (MBP) T cells protect hippocampal neurons against trimethyltin-induced damage. We hypothesized involvement of T cells, interacting with the various glial populations activated during the neurodegeneration process. In this study, we employ immunocytochemical methods to investigate the influence of administration of T cells on the response of microglia and of NG2(+) cells to trimethyltin (TMT)-induced damage. Female Lewis rats were treated with anti-MBP CD4(+) T cells (4 million per animal, i.v) 24 hr after TMT (8 mg/kg, i.p) intoxication. TMT caused degeneration of CA4 hipppocampal neurons and evoked an abundant reaction of microglial and NG2(+) cells in the injured region. The cells changed morphology into the activated state, and the number of OX42(+) and NG2(+) cells increased about 4.5-fold and 3-fold, respectively, relative to controls as assessed on day 21 after TMT treatment. Additionally, the cells of ameboid morphology, which expressed NG2 or microglial antigens, appeared in the zone of neurodegeneration. Furthermore, certain cells of ameboid phenotype shared both antigens. In rats treated with T cells, down-regulation of the activation of both glial classes and reduction of formation of their ameboid forms was observed. The number of the total OX42(+) and NG2(+) cells decreased by 21% and 54%, respectively, and the number of their ameboid forms decreased by 46% and 73%, respectively. Our data suggest that the diminished activation of microglia and NG2(+) cells, particularly the reduced number of their ameboid forms, may contribute to the neuroprotective effect of T cells.
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du Souich P, García AG, Vergés J, Montell E. Immunomodulatory and anti-inflammatory effects of chondroitin sulphate. J Cell Mol Med 2009; 13:1451-63. [PMID: 19522843 PMCID: PMC3828858 DOI: 10.1111/j.1582-4934.2009.00826.x] [Citation(s) in RCA: 119] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Chondroitin sulphate (CS) is a natural glycosaminoglycan present in the extracellular matrix and is formed by the 1–3 linkage of D-glucuronic acid to N-acetylgalactosamine. In chondrocytes, CS diminishes interleukin-1 p (IL-1p)-induced increases in p38 mitogen-activated protein kinase (p38MAPK) and signal-regulated kinase 1/2 (Erk1/2) phosphorylation, and decreases nuclear factor-KB (NF-kB) nuclear translocation and as a consequence, reduces the formation of pro-inflammatory cytokines, IL-1 p and TNF-a, and pro-inflammatory enzymes, such as phospholipase A2 (PLA2), cyclooxygenase 2 (COX-2) and nitric oxide synthase-2 (NOS-2). The mechanism of action of CS explains its beneficial effect on the cartilage, synovial membrane and subchondral bone. On the other hand, in vivo, CS given orally prevents hepatic NF-κB nuclear translocation, suggesting that systemic CS may elicit an anti-inflammatory effect in many tissues besides the articulation. There is preliminary evidence showing that in human beings, CS may be of benefit in other diseases where inflammation is an essential marker, such as psoriasis and atherosclerosis. The review of the literature suggest that CS might also be of interest for the treatment of other diseases with an inflammatory and/or autoimmune character, such as inflammatory bowel disease, degenerative diseases of the central nervous system and stroke, multiple sclerosis and other autoimmune diseases.
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Affiliation(s)
- Patrick du Souich
- Department of Pharmacology, Faculty of Medicine, University of Montréal, Québec, Canada.
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Rolls A, Shechter R, Schwartz M. The bright side of the glial scar in CNS repair. Nat Rev Neurosci 2009; 10:235-41. [PMID: 19229242 DOI: 10.1038/nrn2591] [Citation(s) in RCA: 479] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Following CNS injury, in an apparently counterintuitive response, scar tissue formation inhibits axonal growth, imposing a major barrier to regeneration. Accordingly, scar-modulating treatments have become a leading therapeutic goal in the field of spinal cord injury. However, increasing evidence suggests a beneficial role for this scar tissue as part of the endogenous local immune regulation and repair process. How can these opposing effects be reconciled? Perhaps it is all a matter of timing.
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Affiliation(s)
- Asya Rolls
- Asya Rolls, Ravid Shechter and Michal Schwartz are at the Department of Neurobiology, The Weizmann Institute of Science, 76100 Rehovot, Israel
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The yellow fluorescent protein (YFP-H) mouse reveals neuroprotection as a novel mechanism underlying chondroitinase ABC-mediated repair after spinal cord injury. J Neurosci 2009; 28:14107-20. [PMID: 19109493 DOI: 10.1523/jneurosci.2217-08.2008] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chondroitinase ABC (ChABC) represents a promising therapeutic strategy for the treatment of spinal cord injury due to its potent effects on restoring function to spinal-injured adult mammals. However, there is limited mechanistic insight as to the underlying effects of ChABC treatment, where the effects are mediated, and which signaling pathways are involved in ChABC-mediated repair. Here we use a transgenic (YFP-H) mouse to demonstrate that cortical layer V projection neurons undergo severe atrophy 4 weeks after thoracic dorsal column injury and that ChABC is neuroprotective for these neurons after ICV infusion. ChABC also prevented cell atrophy after localized delivery to the spinal cord, suggesting a possible retrograde neuroprotective effect mediated at the injury site. Furthermore, neuroprotection of corticospinal cell somata coincided with increased axonal sprouting in the spinal cord. In addition, Western blot analysis of a number of kinases important in survival and growth signaling revealed a significant increase in phosphorylated ERK1 at the spinal injury site after in vivo ChABC treatment, indicating that activated ERK may play a role in downstream repair processes after ChABC treatment. Total forms of PKC and AKT were also elevated, indicating that modification of the glial scar by ChABC promotes long-lasting signaling changes at the lesion site. Thus, using the YFP-H mouse as a novel tool to study degenerative changes and repair after spinal cord injury we demonstrate, for the first time, that ChABC treatment regulates multiple signaling cascades at the injury site and exerts protective effects on axotomized corticospinal projection neurons.
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Sato Y, Nakanishi K, Hayakawa M, Kakizawa H, Saito A, Kuroda Y, Ida M, Tokita Y, Aono S, Matsui F, Kojima S, Oohira A. Reduction of brain injury in neonatal hypoxic-ischemic rats by intracerebroventricular injection of neural stem/progenitor cells together with chondroitinase ABC. Reprod Sci 2008; 15:613-20. [PMID: 18579850 DOI: 10.1177/1933719108317299] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Perinatal hypoxia-ischemia (HI) remains a critical issue. Cell transplantation therapy could be a potent treatment for many neurodegenerative diseases, but limited works on this kind of therapy have been reported for perinatal HI. In this study, the therapeutic effect of transplantation with neural stem/ progenitor cells (NSPCs) and chondrotinase ABC (ChABC) in a neonatal HI rat model is evaluated. Histological studies showed that the unaffected area of the brain in animals treated with NSPCs together with ChABC was significantly larger than that in the animals treated with vehicle or NSPCs alone. The wet weight of the brain that received the combined treatment was also significantly higher than those of the vehicle and their individual treatments. These results indicate that intracerebroventricular injection of NSPCs with ChABC reduces brain injury in a rat neonatal HI model.
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Affiliation(s)
- Yoshiaki Sato
- Department of Perinatology, Institute for Developmental Research, Aichi Human Service Center, Kasugai, Aichi, Japan
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Rolls A, Shechter R, London A, Segev Y, Jacob-Hirsch J, Amariglio N, Rechavi G, Schwartz M. Two faces of chondroitin sulfate proteoglycan in spinal cord repair: a role in microglia/macrophage activation. PLoS Med 2008; 5:e171. [PMID: 18715114 PMCID: PMC2517615 DOI: 10.1371/journal.pmed.0050171] [Citation(s) in RCA: 202] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2007] [Accepted: 07/07/2008] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Chondroitin sulfate proteoglycan (CSPG) is a major component of the glial scar. It is considered to be a major obstacle for central nervous system (CNS) recovery after injury, especially in light of its well-known activity in limiting axonal growth. Therefore, its degradation has become a key therapeutic goal in the field of CNS regeneration. Yet, the abundant de novo synthesis of CSPG in response to CNS injury is puzzling. This apparent dichotomy led us to hypothesize that CSPG plays a beneficial role in the repair process, which might have been previously overlooked because of nonoptimal regulation of its levels. This hypothesis is tested in the present study. METHODS AND FINDINGS We inflicted spinal cord injury in adult mice and examined the effects of CSPG on the recovery process. We used xyloside to inhibit CSPG formation at different time points after the injury and analyzed the phenotype acquired by the microglia/macrophages in the lesion site. To distinguish between the resident microglia and infiltrating monocytes, we used chimeric mice whose bone marrow-derived myeloid cells expressed GFP. We found that CSPG plays a key role during the acute recovery stage after spinal cord injury in mice. Inhibition of CSPG synthesis immediately after injury impaired functional motor recovery and increased tissue loss. Using the chimeric mice we found that the immediate inhibition of CSPG production caused a dramatic effect on the spatial organization of the infiltrating myeloid cells around the lesion site, decreased insulin-like growth factor 1 (IGF-1) production by microglia/macrophages, and increased tumor necrosis factor alpha (TNF-alpha) levels. In contrast, delayed inhibition, allowing CSPG synthesis during the first 2 d following injury, with subsequent inhibition, improved recovery. Using in vitro studies, we showed that CSPG directly activated microglia/macrophages via the CD44 receptor and modulated neurotrophic factor secretion by these cells. CONCLUSIONS Our results show that CSPG plays a pivotal role in the repair of injured spinal cord and in the recovery of motor function during the acute phase after the injury; CSPG spatially and temporally controls activity of infiltrating blood-borne monocytes and resident microglia. The distinction made in this study between the beneficial role of CSPG during the acute stage and its deleterious effect at later stages emphasizes the need to retain the endogenous potential of this molecule in repair by controlling its levels at different stages of post-injury repair.
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Affiliation(s)
- Asya Rolls
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - Ravid Shechter
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - Anat London
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - Yifat Segev
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
| | - Jasmin Jacob-Hirsch
- Cancer Research Center, Sheba Medical Center and Sackler School of Medicine Tel-Aviv University, Ramat Aviv, Israel
| | - Ninette Amariglio
- Cancer Research Center, Sheba Medical Center and Sackler School of Medicine Tel-Aviv University, Ramat Aviv, Israel
| | - Gidon Rechavi
- Cancer Research Center, Sheba Medical Center and Sackler School of Medicine Tel-Aviv University, Ramat Aviv, Israel
| | - Michal Schwartz
- Department of Neurobiology, The Weizmann Institute of Science, Rehovot, Israel
- * To whom correspondence should be addressed. E-mail:
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Ebert S, Schoeberl T, Walczak Y, Stoecker K, Stempfl T, Moehle C, Weber BHF, Langmann T. Chondroitin sulfate disaccharide stimulates microglia to adopt a novel regulatory phenotype. J Leukoc Biol 2008; 84:736-40. [DOI: 10.1189/jlb.0208138] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Chan CCM, Roberts CR, Steeves JD, Tetzlaff W. Aggrecan components differentially modulate nerve growth factor-responsive and neurotrophin-3-responsive dorsal root ganglion neurite growth. J Neurosci Res 2008; 86:581-92. [PMID: 17918743 DOI: 10.1002/jnr.21522] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Aggrecan is one of the major chondroitin sulfate proteoglycans (CSPGs) expressed in the central nervous system. The signaling pathways activated downstream of cell interaction with aggrecan and with CSPGs in general and the importance of chondroitin sulfate-glycosaminoglycan side chains in their inhibition are unclear. Therefore, to analyze the effect of different components of aggrecan in inhibiting neurite growth, neurite outgrowth was quantified in an in vitro model in which chick dorsal root ganglion (DRG) explants were grown on substrates containing aggrecan bound to hyaluronan and link protein as a macromolecular aggregate, aggrecan monomers, hyaluronan, or ChABC-treated aggrecan. Aggrecan aggregate, aggrecan monomer, and hyaluronan inhibited neurite outgrowth from nerve growth factor (NGF)- and neurotrophin-3 (NT3)-responsive DRG neurons. Aggrecan inhibition was dependent on its chondroitin sulfate-glycosaminoglycans, as ChABC digestion alleviated neurite inhibition because of aggrecan. Growth cones displayed full or partial collapse on aggrecan aggregate, hyaluronan, and ChABC-treated aggrecan. Inhibition of Rho kinase (ROCK) with Y27632 increased neurite growth on some but not all of the aggrecan components tested. With NGF in the culture medium, Y27632 increased neurite outgrowth on aggrecan aggregate, monomers, and ChABC-treated aggrecan, but not on hyaluronan. The ROCK inhibitor also increased NT3-responsive outgrowth on aggrecan aggregate and hyaluronan, but not on ChABC-treated aggrecan. This study showed that the matrix proteoglycan aggrecan and its components have multiple effects on neurite outgrowth and that some of these effects involve the Rho/ROCK pathway.
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Affiliation(s)
- Carmen C M Chan
- ICORD (International Collaboration on Repair Discoveries), Vancouver, British Columbia, Canada
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Kaneiwa T, Yamada S, Mizumoto S, Montaño AM, Mitani S, Sugahara K. Identification of a novel chondroitin hydrolase in Caenorhabditis elegans. J Biol Chem 2008; 283:14971-9. [PMID: 18390555 DOI: 10.1074/jbc.m709236200] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Hyaluronidases have been postulated to be the enzyme acting at the initial step of chondroitin sulfate (CS) catabolism in vivo. Since chondroitin (Chn) but not hyaluronic acid (HA) has been detected in Caenorhabditis elegans, the nematode is a good model for elucidating the mechanism of the degradation of CS/Chn in vivo. Here we cloned the homolog of human hyaluronidase in C. elegans, T22C8.2. The Chn-degrading activity in vitro was first demonstrated when it was expressed in COS-7 cells. The enzyme cleaved preferentially Chn. CS-A and CS-C were also depolymerized but to lesser extents, and HA was hardly degraded. In order of preference, the substrates ranked Chn >> CS-A > CS-C >> HA. The products of the degradation of Chn by the enzyme were characterized by anion-exchange high performance liquid chromatography and delayed extraction matrix-assisted laser desorption ionization time-of-flight mass spectrometry. The structure of the major component in the digest was determined as GlcUAbeta1-3GalNAcbeta1-4GlcUAbeta1-3GalNAc, where GlcUA and GalNAc represent D-glucuronic acid and N-acetyl-D-galactosamine, respectively, indicating that this enzyme is a Chn hydrolase, an endo-beta-galactosaminidase specific for Chn. Investigation of the effects of pH on the activity revealed the optimum pH of Chn hydrolase to be 6.0. Since Chn in C. elegans has been demonstrated to play critical roles in cell division, Chn hydrolase possibly regulates the function of Chn in vivo. This is the first demonstration of a Chn hydrolase in an animal.
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Affiliation(s)
- Tomoyuki Kaneiwa
- Laboratory of Proteoglycan Signaling and Therapeutics, Hokkaido University Graduate School of Life Science, Nishi-11-choume, Kita 21-jo, Kita-ku, Sapporo, Japan
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Sato Y, Nakanishi K, Tokita Y, Kakizawa H, Ida M, Maeda H, Matsui F, Aono S, Saito A, Kuroda Y, Hayakawa M, Kojima S, Oohira A. A highly sulfated chondroitin sulfate preparation, CS-E, prevents excitatory amino acid-induced neuronal cell death. J Neurochem 2007; 104:1565-76. [DOI: 10.1111/j.1471-4159.2007.05107.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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