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Thede AT, Tang JD, Cocker CE, Harold LJ, Amelung CD, Kittel AR, Taylor PA, Lampe KJ. Effects of Cell-Adhesive Ligand Presentation on Pentapeptide Supramolecular Assembly and Gelation: Simulations and Experiments. Cells Tissues Organs 2023; 212:468-483. [PMID: 37751723 DOI: 10.1159/000534280] [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: 12/21/2022] [Accepted: 09/21/2023] [Indexed: 09/28/2023] Open
Abstract
The extracellular matrix (ECM) is a complex, hierarchical material containing structural and bioactive components. This complexity makes decoupling the effects of biomechanical properties and cell-matrix interactions difficult, especially when studying cellular processes in a 3D environment. Matrix mechanics and cell adhesion are both known regulators of specific cellular processes such as stem cell proliferation and differentiation. However, more information is required about how such variables impact various neural lineages that could, upon transplantation, therapeutically improve neural function after a central nervous system injury or disease. Rapidly Assembling Pentapeptides for Injectable Delivery (RAPID) hydrogels are one biomaterial approach to meet these goals, consisting of a family of peptide sequences that assemble into physical hydrogels in physiological media. In this study, we studied our previously reported supramolecularly-assembling RAPID hydrogels functionalized with the ECM-derived cell-adhesive peptide ligands RGD, IKVAV, and YIGSR. Using molecular dynamics simulations and experimental rheology, we demonstrated that these integrin-binding ligands at physiological concentrations (3-12 mm) did not impact the assembly of the KYFIL peptide system. In simulations, molecular measures of assembly such as hydrogen bonding and pi-pi interactions appeared unaffected by cell-adhesion sequence or concentration. Visualizations of clustering and analysis of solvent-accessible surface area indicated that the integrin-binding domains remained exposed. KYFIL or AYFIL hydrogels containing 3 mm of integrin-binding domains resulted in mechanical properties consistent with their non-functionalized equivalents. This strategy of doping RAPID gels with cell-adhesion sequences allows for the precise tuning of peptide ligand concentration, independent of the rheological properties. The controllability of the RAPID hydrogel system provides an opportunity to investigate the effect of integrin-binding interactions on encapsulated neural cells to discern how hydrogel microenvironment impacts growth, maturation, or differentiation.
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Affiliation(s)
- Andrew T Thede
- University of Virginia Biomedical Engineering, Charlottesville, Virginia, USA
| | - James D Tang
- University of Virginia Chemical Engineering, Charlottesville, Virginia, USA
| | - Clare E Cocker
- University of Virginia Chemical Engineering, Charlottesville, Virginia, USA
| | - Liza J Harold
- University of Virginia Biomedical Engineering, Charlottesville, Virginia, USA
| | - Connor D Amelung
- University of Virginia Biomedical Engineering, Charlottesville, Virginia, USA
| | - Anna R Kittel
- University of Virginia Biomedical Engineering, Charlottesville, Virginia, USA
| | - Phillip A Taylor
- University of Virginia Chemical Engineering, Charlottesville, Virginia, USA
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Dermitzakis I, Manthou ME, Meditskou S, Miliaras D, Kesidou E, Boziki M, Petratos S, Grigoriadis N, Theotokis P. Developmental Cues and Molecular Drivers in Myelinogenesis: Revisiting Early Life to Re-Evaluate the Integrity of CNS Myelin. Curr Issues Mol Biol 2022; 44:3208-3237. [PMID: 35877446 PMCID: PMC9324160 DOI: 10.3390/cimb44070222] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/14/2022] [Accepted: 07/17/2022] [Indexed: 02/07/2023] Open
Abstract
The mammalian central nervous system (CNS) coordinates its communication through saltatory conduction, facilitated by myelin-forming oligodendrocytes (OLs). Despite the fact that neurogenesis from stem cell niches has caught the majority of attention in recent years, oligodendrogenesis and, more specifically, the molecular underpinnings behind OL-dependent myelinogenesis, remain largely unknown. In this comprehensive review, we determine the developmental cues and molecular drivers which regulate normal myelination both at the prenatal and postnatal periods. We have indexed the individual stages of myelinogenesis sequentially; from the initiation of oligodendrocyte precursor cells, including migration and proliferation, to first contact with the axon that enlists positive and negative regulators for myelination, until the ultimate maintenance of the axon ensheathment and myelin growth. Here, we highlight multiple developmental pathways that are key to successful myelin formation and define the molecular pathways that can potentially be targets for pharmacological interventions in a variety of neurological disorders that exhibit demyelination.
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Affiliation(s)
- Iasonas Dermitzakis
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Maria Eleni Manthou
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Soultana Meditskou
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Dimosthenis Miliaras
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
| | - Evangelia Kesidou
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
| | - Marina Boziki
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
| | - Steven Petratos
- Department of Neuroscience, Central Clinical School, Monash University, Prahran, VIC 3004, Australia;
| | - Nikolaos Grigoriadis
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
| | - Paschalis Theotokis
- Department of Histology-Embryology, School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (I.D.); (M.E.M.); (S.M.); (D.M.)
- Laboratory of Experimental Neurology and Neuroimmunology, Second Department of Neurology, AHEPA University Hospital, 54621 Thessaloniki, Greece; (E.K.); (M.B.); (N.G.)
- Correspondence:
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3
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Narine M, Colognato H. Current Insights Into Oligodendrocyte Metabolism and Its Power to Sculpt the Myelin Landscape. Front Cell Neurosci 2022; 16:892968. [PMID: 35573837 PMCID: PMC9097137 DOI: 10.3389/fncel.2022.892968] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 04/06/2022] [Indexed: 12/20/2022] Open
Abstract
Once believed to be part of the nervenkitt or "nerve glue" network in the central nervous system (CNS), oligodendroglial cells now have established roles in key neurological functions such as myelination, neuroprotection, and motor learning. More recently, oligodendroglia has become the subject of intense investigations aimed at understanding the contributions of its energetics to CNS physiology and pathology. In this review, we discuss the current understanding of oligodendroglial metabolism in regulating key stages of oligodendroglial development and health, its role in providing energy to neighboring cells such as neurons, as well as how alterations in oligodendroglial bioenergetics contribute to disease states. Importantly, we highlight how certain inputs can regulate oligodendroglial metabolism, including extrinsic and intrinsic mediators of cellular signaling, pharmacological compounds, and even dietary interventions. Lastly, we discuss emerging studies aimed at discovering the therapeutic potential of targeting components within oligodendroglial bioenergetic pathways.
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Affiliation(s)
- Mohanlall Narine
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY, United States
- Department of Neurobiology, & Behavior, Stony Brook University, Stony Brook, NY, United States
| | - Holly Colognato
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY, United States
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4
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Abstract
Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disorder characterized by irreversible deterioration of upper and lower motor neurons (MNs). Previously, studies on the involvement of glial cells in the pathogenic process of ALS have mainly revolved around astrocytes and microglia. And oligodendrocytes (OLs) have only recently been highlighted. Grey matter demyelination within the motor cortex and proliferation of the oligodendrocyte precursor cells (OPCs) was observed in ALS patients. The selective ablation of mutant SOD1 (the dysfunctional superoxide dismutase) from the oligodendrocyte progenitors after birth significantly delayed disease onset and prolonged the overall survival in ALS mice model (SOD1G37R). In this study, we review the several mechanisms of oligodendrocyte dysfunction involved in the pathological process of myelin damage and MNs death during ALS. Particularly, we examined the insufficient local energy supply from OLs to axons, impaired differentiation from OPCs into OLs mediated by oxidative stress damage, and inflammatory injury to the OLs. Since increasing evidence depicted that ALS is not a disease limited to MNs damage, exploring the mechanisms by which oligodendrocyte dysfunction is involved in MNs death would contribute to a more comprehensive understanding of ALS and identifying potential drug targets.
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Affiliation(s)
- Zhenxiang Gong
- Department of Neurology and Psychiatry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Li Ba
- Department of Neurology and Psychiatry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Min Zhang
- Department of Neurology and Psychiatry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
- Min Zhang, Department of Neurology and Psychiatry, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Road, Qiaokou District, Wuhan, Hubei 430030, China. Tel: +86-27-83663895, E-mail:
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5
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Spaas J, van Veggel L, Schepers M, Tiane A, van Horssen J, Wilson DM, Moya PR, Piccart E, Hellings N, Eijnde BO, Derave W, Schreiber R, Vanmierlo T. Oxidative stress and impaired oligodendrocyte precursor cell differentiation in neurological disorders. Cell Mol Life Sci 2021; 78:4615-4637. [PMID: 33751149 PMCID: PMC8195802 DOI: 10.1007/s00018-021-03802-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 02/12/2021] [Accepted: 02/24/2021] [Indexed: 02/07/2023]
Abstract
Oligodendrocyte precursor cells (OPCs) account for 5% of the resident parenchymal central nervous system glial cells. OPCs are not only a back-up for the loss of oligodendrocytes that occurs due to brain injury or inflammation-induced demyelination (remyelination) but are also pivotal in plastic processes such as learning and memory (adaptive myelination). OPC differentiation into mature myelinating oligodendrocytes is controlled by a complex transcriptional network and depends on high metabolic and mitochondrial demand. Mounting evidence shows that OPC dysfunction, culminating in the lack of OPC differentiation, mediates the progression of neurodegenerative disorders such as multiple sclerosis, Alzheimer's disease and Parkinson's disease. Importantly, neurodegeneration is characterised by oxidative and carbonyl stress, which may primarily affect OPC plasticity due to the high metabolic demand and a limited antioxidant capacity associated with this cell type. The underlying mechanisms of how oxidative/carbonyl stress disrupt OPC differentiation remain enigmatic and a focus of current research efforts. This review proposes a role for oxidative/carbonyl stress in interfering with the transcriptional and metabolic changes required for OPC differentiation. In particular, oligodendrocyte (epi)genetics, cellular defence and repair responses, mitochondrial signalling and respiration, and lipid metabolism represent key mechanisms how oxidative/carbonyl stress may hamper OPC differentiation in neurodegenerative disorders. Understanding how oxidative/carbonyl stress impacts OPC function may pave the way for future OPC-targeted treatment strategies in neurodegenerative disorders.
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Affiliation(s)
- Jan Spaas
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
- Department of Movement and Sports Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Lieve van Veggel
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
- Department Psychiatry and Neuropsychology, Division of Translational Neuroscience, European Graduate School of Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Melissa Schepers
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
- Department Psychiatry and Neuropsychology, Division of Translational Neuroscience, European Graduate School of Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Assia Tiane
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
- Department Psychiatry and Neuropsychology, Division of Translational Neuroscience, European Graduate School of Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Jack van Horssen
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
- Department of Molecular Cell Biology and Immunology, Amsterdam Neuroscience, MS Center Amsterdam, Amsterdam University Medical Center, Location VUmc, Amsterdam, The Netherlands
| | - David M Wilson
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
| | - Pablo R Moya
- Facultad de Ciencias, Instituto de Fisiología, Centro Interdisciplinario de Neurociencia de Valparaíso (CINV), Universidad de Valparaíso, Valparaíso, Chile
| | - Elisabeth Piccart
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
| | - Niels Hellings
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
| | - Bert O Eijnde
- University MS Center (UMSC), Hasselt-Pelt, Belgium
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium
- Faculty of Medicine and Life Sciences, SMRC-Sportsmedical Research Center, BIOMED Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium
| | - Wim Derave
- Department of Movement and Sports Sciences, Faculty of Medicine and Health Sciences, Ghent University, Ghent, Belgium
| | - Rudy Schreiber
- Department Psychiatry and Neuropsychology, Division of Translational Neuroscience, European Graduate School of Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Tim Vanmierlo
- University MS Center (UMSC), Hasselt-Pelt, Belgium.
- BIOMED Biomedical Research Institute, Faculty of Medicine and Life Sciences, Hasselt University, Hasselt, Belgium.
- Department Psychiatry and Neuropsychology, Division of Translational Neuroscience, European Graduate School of Neuroscience, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands.
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6
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Hydrogen Peroxide-Preconditioned Human Adipose-Derived Stem Cells Enhance the Recovery of Oligodendrocyte-Like Cells after Oxidative Stress-Induced Damage. Int J Mol Sci 2020; 21:ijms21249513. [PMID: 33327653 PMCID: PMC7765141 DOI: 10.3390/ijms21249513] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 12/11/2020] [Accepted: 12/12/2020] [Indexed: 12/17/2022] Open
Abstract
Oxidative stress associated with neuroinflammation is a key process involved in the pathophysiology of neurodegenerative diseases, and therefore, has been proposed as a crucial target for new therapies. Recently, the therapeutic potential of human adipose-derived stem cells (hASCs) has been investigated as a novel strategy for neuroprotection. These cells can be preconditioned by exposing them to mild stress in order to improve their response to oxidative stress. In this study, we evaluate the therapeutic potential of hASCs preconditioned with low doses of H2O2 (called HC016 cells) to overcome the deleterious effect of oxidative stress in an in vitro model of oligodendrocyte-like cells (HOGd), through two strategies: i, the culture of oxidized HOGd with HC016 cell-conditioned medium (CM), and ii, the indirect co-culture of oxidized HOGd with HC016 cells, which had or had not been exposed to oxidative stress. The results demonstrated that both strategies had reparative effects, oxidized HC016 cell co-culture being the one associated with the greatest recovery of the damaged HOGd, increasing their viability, reducing their intracellular reactive oxygen species levels and promoting their antioxidant capacity. Taken together, these findings support the view that HC016 cells, given their reparative capacity, might be considered an important breakthrough in cell-based therapies.
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7
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Carlström KE, Zhu K, Ewing E, Krabbendam IE, Harris RA, Falcão AM, Jagodic M, Castelo-Branco G, Piehl F. Gsta4 controls apoptosis of differentiating adult oligodendrocytes during homeostasis and remyelination via the mitochondria-associated Fas-Casp8-Bid-axis. Nat Commun 2020; 11:4071. [PMID: 32792491 PMCID: PMC7426940 DOI: 10.1038/s41467-020-17871-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 07/23/2020] [Indexed: 01/20/2023] Open
Abstract
Arrest of oligodendrocyte (OL) differentiation and remyelination following myelin damage in multiple sclerosis (MS) is associated with neurodegeneration and clinical worsening. We show that Glutathione S-transferase 4α (Gsta4) is highly expressed during adult OL differentiation and that Gsta4 loss impairs differentiation into myelinating OLs in vitro. In addition, we identify Gsta4 as a target of both dimethyl fumarate, an existing MS therapy, and clemastine fumarate, a candidate remyelinating agent in MS. Overexpression of Gsta4 reduces expression of Fas and activity of the mitochondria-associated Casp8-Bid-axis in adult oligodendrocyte precursor cells, leading to improved OL survival during differentiation. The Gsta4 effect on apoptosis during adult OL differentiation was corroborated in vivo in both lysolecithin-induced demyelination and experimental autoimmune encephalomyelitis models, where Casp8 activity was reduced in Gsta4-overexpressing OLs. Our results identify Gsta4 as an intrinsic regulator of OL differentiation, survival and remyelination, as well as a potential target for future reparative MS therapies.
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Affiliation(s)
- Karl E Carlström
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden.
| | - Keying Zhu
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden
| | - Ewoud Ewing
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden
| | - Inge E Krabbendam
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden
| | - Robert A Harris
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden
| | - Ana Mendanha Falcão
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Biomedicum, Karolinska Institutet, 17177, Stockholm, Sweden
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Minho, Portugal
| | - Maja Jagodic
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden
| | - Gonçalo Castelo-Branco
- Laboratory of Molecular Neurobiology, Department Medical Biochemistry and Biophysics, Biomedicum, Karolinska Institutet, 17177, Stockholm, Sweden
- Ming Wai Lau Centre for Reparative Medicine, Stockholm node, Karolinska Institutet, Stockholm, Sweden
| | - Fredrik Piehl
- Department of Clinical Neurosciences, Karolinska Institutet, Center for Molecular Medicine, Karolinska Hospital at Solna, 17177, Stockholm, Sweden
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8
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Murphy NP, Lampe KJ. Fabricating PLGA microparticles with high loads of the small molecule antioxidant N-acetylcysteine that rescue oligodendrocyte progenitor cells from oxidative stress. Biotechnol Bioeng 2017; 115:246-256. [PMID: 28872660 DOI: 10.1002/bit.26443] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/12/2017] [Accepted: 08/28/2017] [Indexed: 01/02/2023]
Abstract
Reactive oxygen species (ROS), encompassing all oxygen radical or non-radical oxidizing agents, play key roles in disease progression. Controlled delivery of antioxidants is therapeutically relevant in such oxidant-stressed environments. Encapsulating small hydrophilic molecules into hydrophobic polymer microparticles via traditional emulsion methods has long been a challenge due to rapid mass transport of small molecules out of particle pores. We have developed a simple alteration to the existing water-in-oil-in-water (W/O/W) drug encapsulation method that dramatically improves loading efficiency: doping external water phases with drug to mitigate drug diffusion out of the particle during fabrication. PLGA microparticles with diameters ranging from 0.6 to 0.9 micrometers were fabricated, encapsulating high loads of 0.6-0.9 µm diameter PLGA microparticles were fabricated, encapsulating high loads of the antioxidant N-acetylcysteine (NAC), and released active, ROS-scavenging NAC for up to 5 weeks. Encapsulation efficiencies, normalized to the theoretical load of traditional encapsulation without doping, ranged from 96% to 400%, indicating that NAC-loaded external water phases not only prevented drug loss due to diffusion, but also doped the particles with additional drug. Antioxidant-doped particles positively affected the metabolism of oligodendrocyte progenitor cells (OPCs) under H2 O2 -mediated oxidative stress when administered both before (protection) or after (rescue) injury. Antioxidant doped particles improved outcomes of OPCs experiencing multiple doses of H2 O2 by increasing the intracellular glutathione content and preserving cellular viability relative to the injury control. Furthermore, antioxidant-doped particles preserve cell number, number of process extensions, cytoskeletal morphology, and nuclear size of H2 O2 -stressed OPCs relative to the injury control. These NAC-doped particles have the potential to provide temporally-controlled antioxidant therapy in neurodegenerative disorders such as multiple sclerosis (MS) that are characterized by continuous oxidative stress.
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Affiliation(s)
- Nicholas P Murphy
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia
| | - Kyle J Lampe
- Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia
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9
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Rao VTS, Khan D, Cui QL, Fuh SC, Hossain S, Almazan G, Multhaup G, Healy LM, Kennedy TE, Antel JP. Distinct age and differentiation-state dependent metabolic profiles of oligodendrocytes under optimal and stress conditions. PLoS One 2017; 12:e0182372. [PMID: 28792512 PMCID: PMC5549710 DOI: 10.1371/journal.pone.0182372] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/17/2017] [Indexed: 12/18/2022] Open
Abstract
Within the microenvironment of multiple sclerosis lesions, oligodendrocytes are subject to metabolic stress reflecting effects of focal ischemia and inflammation. Previous studies have shown that under optimal conditions in vitro, the respiratory activity of human adult brain-derived oligodendrocytes is lower and more predominantly glycolytic compared to oligodendrocytes differentiated in vitro from post natal rat brain oligodendrocyte progenitor cells. In response to sub-lethal metabolic stress, adult human oligodendrocytes reduce overall energy production rate impacting the capacity to maintain myelination. Here, we directly compare the metabolic profiles of oligodendrocytes derived from adult rat brain with oligodendrocytes newly differentiated in vitro from oligodendrocyte progenitor cells obtained from the post natal rat brain, under both optimal culture and metabolic stress (low/no glucose) conditions. Oxygen consumption and extracellular acidification rates were measured using a Seahorse extracellular flux analyzer. Our findings indicate that under optimal conditions, adult rat oligodendrocytes preferentially use glycolysis whereas newly differentiated post natal rat oligodendrocytes, and the oligodendrocyte progenitor cells from which they are derived, mainly utilize oxidative phosphorylation to produce ATP. Metabolic stress increases the rate of ATP production via oxidative phosphorylation and significantly reduces glycolysis in adult oligodendrocytes. The rate of ATP production was relatively unchanged in newly differentiated post natal oligodendrocytes under these stress conditions, while it was significantly reduced in oligodendrocyte progenitor cells. Our study indicates that both age and maturation influence the metabolic profile under optimal and stressed conditions, emphasizing the need to consider these variables for in vitro studies that aim to model adult human disease.
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Affiliation(s)
- Vijayaraghava T. S. Rao
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
- * E-mail:
| | - Damla Khan
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Qiao-Ling Cui
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Shih-Chieh Fuh
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Shireen Hossain
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Guillermina Almazan
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Gerhard Multhaup
- Department of Pharmacology and Therapeutics, McGill University, Montreal, Quebec, Canada
| | - Luke M. Healy
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Timothy E. Kennedy
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
| | - Jack P. Antel
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada
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iPS-derived neural progenitor cells from PPMS patients reveal defect in myelin injury response. Exp Neurol 2016; 288:114-121. [PMID: 27865736 DOI: 10.1016/j.expneurol.2016.11.012] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 11/14/2016] [Accepted: 11/15/2016] [Indexed: 01/09/2023]
Abstract
Primary progressive multiple sclerosis (PPMS) is a chronic demyelinating disease of the central nervous system (CNS) currently lacking any effective treatment. Promoting endogenous brain repair offers a potential strategy to halt and possibly restore neurologic function in PPMS. To understand how the microenvironment within white matter lesions plays a role in repair we have focused on neural progenitor cells (NPCs) since these are found in lesions in PPMS and have been found to influence oligodendrocyte progenitor cell maturation (OPCs). To better understand the cellular nature of NPCs in PPMS we developed iPS cells from blood samples of PPMS patients and age matched non-disease spouse or blood relative controls. Using these iPS cell lines we determined that the NPCs from PPMS cases provided no neuroprotection against active CNS demyelination compared to NPCs from control iPS lines which were capable of completely preventing injury. Conditioned media (CM) from PPMS NPCs provides no protection to OPCs and prevents maturation of OPCs into oligodendrocytes in vitro. We also found that CM from PPMS iPS NPCs elicited patient-specific differences in the response to compounds that should foster oligodendrocyte (OL) maturation. Together, these data establish a new model for understanding the nature of myelination defects in PPMS which may lead to novel targeted approaches for preventing demyelination in these patients.
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Delbary-Gossart S, Lee S, Baroni M, Lamarche I, Arnone M, Canolle B, Lin A, Sacramento J, Salegio EA, Castel MN, Delesque-Touchard N, Alam A, Laboudie P, Ferzaz B, Savi P, Herbert JM, Manley GT, Ferguson AR, Bresnahan JC, Bono F, Beattie MS. A novel inhibitor of p75-neurotrophin receptor improves functional outcomes in two models of traumatic brain injury. Brain 2016; 139:1762-82. [PMID: 27084575 PMCID: PMC4892754 DOI: 10.1093/brain/aww074] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 02/20/2016] [Indexed: 11/14/2022] Open
Abstract
The p75 neurotrophin receptor is important in multiple physiological actions including neuronal survival and neurite outgrowth during development, and after central nervous system injury. We have discovered a novel piperazine-derived compound, EVT901, which interferes with p75 neurotrophin receptor oligomerization through direct interaction with the first cysteine-rich domain of the extracellular region. Using ligand binding assays with cysteine-rich domains-fused p75 neurotrophin receptor, we confirmed that EVT901 interferes with oligomerization of full-length p75 neurotrophin receptor in a dose-dependent manner. Here we report that EVT901 reduces binding of pro-nerve growth factor to p75 neurotrophin receptor, blocks pro-nerve growth factor induced apoptosis in cells expressing p75 neurotrophin receptor, and enhances neurite outgrowth in vitro. Furthermore, we demonstrate that EVT901 abrogates p75 neurotrophin receptor signalling by other ligands, such as prion peptide and amyloid-β. To test the efficacy of EVT901 in vivo, we evaluated the outcome in two models of traumatic brain injury. We generated controlled cortical impacts in adult rats. Using unbiased stereological analysis, we found that EVT901 delivered intravenously daily for 1 week after injury, reduced lesion size, protected cortical neurons and oligodendrocytes, and had a positive effect on neurological function. After lateral fluid percussion injury in adult rats, oral treatment with EVT901 reduced neuronal death in the hippocampus and thalamus, reduced long-term cognitive deficits, and reduced the occurrence of post-traumatic seizure activity. Together, these studies provide a new reagent for altering p75 neurotrophin receptor actions after injury and suggest that EVT901 may be useful in treatment of central nervous system trauma and other neurological disorders where p75 neurotrophin receptor signalling is affected.
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Affiliation(s)
| | - Sangmi Lee
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Marco Baroni
- 3 Sanofi Research, Exploratory Unit, Via Gaetano Sbodio 2, 20134 Milano, Italy
| | - Isabelle Lamarche
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Michele Arnone
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Benoit Canolle
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Amity Lin
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Jeffrey Sacramento
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Ernesto A Salegio
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Marie-Noelle Castel
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | | | - Antoine Alam
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Patricia Laboudie
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Badia Ferzaz
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Pierre Savi
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Jean-Marc Herbert
- 4 From Sanofi Research, Early to Candidate, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Geoffrey T Manley
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Adam R Ferguson
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Jacqueline C Bresnahan
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
| | - Françoise Bono
- 1 Evotec, 195 route d'Espagne, 31036 Toulouse cedex, France
| | - Michael S Beattie
- 2 Brain and Spinal Injury Center, Department of Neurological Surgery, University of California, San Francisco, 1001 Potrero Ave, San Francisco, CA 94110, USA
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Fitzpatrick JMK, Anderson RC, McDermott KW. MicroRNA: Key regulators of oligodendrocyte development and pathobiology. Int J Biochem Cell Biol 2015; 65:134-8. [PMID: 26026282 DOI: 10.1016/j.biocel.2015.05.021] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Revised: 05/19/2015] [Accepted: 05/21/2015] [Indexed: 11/25/2022]
Abstract
MicroRNAs (miRNAs or miRs) are a group of small non-coding RNAs that function through binding to messenger RNA (mRNA) targets and downregulating gene expression. miRNAs have been shown to regulate many cellular functions including proliferation, differentiation, development and apoptosis. Recently, evidence has grown which shows the involvement of miRs in oligodendrocyte (OL) specification and development. In particular, miRs-138, -219, -338, and -9 have been classified as key regulators of OL development, acting at various points in the OL lineage and influencing precursor cell transit into mature myelinating OLs. Many studies have emerged which link miRNAs with OL and myelin pathology in various central nervous system (CNS) diseases including multiple sclerosis (MS), ischemic stroke, spinal cord injury, and adult-onset autosomal dominant leukodystrophy (ADLD).
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13
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Identifying the role of microRNAs in spinal cord injury. Neurol Sci 2014; 35:1663-71. [PMID: 25231644 DOI: 10.1007/s10072-014-1940-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 08/06/2014] [Indexed: 02/07/2023]
Abstract
Spinal cord injury (SCI) is medically and socioeconomically debilitating, and effective treatments are lacking. The elucidation of the pathophysiological mechanisms underlying SCI is essential for developing effective treatments for SCI. MicroRNAs (miRNAs) are small non-coding RNA molecules (18-24 nucleotides long) that regulate gene expression by interacting with specific target sequences. Recent studies suggest that miRNAs can act as post-transcriptional regulators to inhibit mRNA translation. Bioinformatic analyses indicate that the altered expression of miRNAs has an effect on critical processes of SCI physiopathology, including astrogliosis, oxidative stress, inflammation, apoptosis, and neuroplasticity. Therefore, the study of miRNAs may provide new insights into the molecular mechanisms of SCI. Current studies have also provided potential therapeutic clinical applications that involve targeting mRNAs to treat SCI. This review summarizes the biogenesis and function of miRNAs and the roles of miRNAs in SCI. We also discuss the potential therapeutic applications of miRNA-based interventions for SCI.
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MicroRNAs: novel regulators of oligodendrocyte differentiation and potential therapeutic targets in demyelination-related diseases. Mol Neurobiol 2012; 45:200-12. [PMID: 22218763 DOI: 10.1007/s12035-011-8231-z] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2011] [Accepted: 12/22/2011] [Indexed: 12/13/2022]
Abstract
MicroRNAs (miRNAs or miRs) are a class of endogenous small non-coding RNAs that consist of about 22 nucleotides and play critical roles in various biological processes, including cell proliferation, differentiation, apoptosis, and tumorigenesis. In recent years, some specific miRNA, such as miR-219, miR-138, miR-9, miR-23, and miR-19b were found to participate in the regulation of oligodendrocyte (OL) differentiation and myelin maintenance, as well as in the pathogenesis of demyelination-related diseases (e.g., multiple sclerosis, ischemic stroke, and leukodystrophy). These miRNAs control their target mRNA or regulate the protein levels of some signaling pathways, and participate in OL differentiation and the pathogenesis of demyelination-related diseases. During pathologic processes, the expression levels of specific miRNAs are dynamically altered. Therefore, miRNAs act as diagnostic and prognostic indicators of defects in OL differentiation and demyelination-related diseases, and they can provide potential targets for therapeutic drug development.
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