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Favrais G, Bokobza C, Saliba E, Chalon S, Gressens P. Alteration of the Oligodendrocyte Lineage Varies According to the Systemic Inflammatory Stimulus in Animal Models That Mimic the Encephalopathy of Prematurity. Front Physiol 2022; 13:881674. [PMID: 35928559 PMCID: PMC9343871 DOI: 10.3389/fphys.2022.881674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 06/23/2022] [Indexed: 11/29/2022] Open
Abstract
Preterm birth before the gestational age of 32 weeks is associated with the occurrence of specific white matter damage (WMD) that can compromise the neurological outcome. These white matter abnormalities are embedded in more global brain damage defining the encephalopathy of prematurity (EoP). A global reduction in white matter volume that corresponds to chronic diffuse WMD is the most frequent form in contemporary cohorts of very preterm infants. This WMD partly results from alterations of the oligodendrocyte (OL) lineage during the vulnerability window preceding the beginning of brain myelination. The occurrence of prenatal, perinatal and postnatal events in addition to preterm birth is related to the intensity of WMD. Systemic inflammation is widely recognised as a risk factor of WMD in humans and in animal models. This review reports the OL lineage alterations associated with the WMD observed in infants suffering from EoP and emphasizes the role of systemic inflammation in inducing these alterations. This issue is addressed through data on human tissue and imaging, and through neonatal animal models that use systemic inflammation to induce WMD. Interestingly, the OL lineage damage varies according to the inflammatory stimulus, i.e., the liposaccharide portion of the E.Coli membrane (LPS) or the proinflammatory cytokine Interleukin-1β (IL-1β). This discrepancy reveals multiple cellular pathways inducible by inflammation that result in EoP. Variable long-term consequences on the white matter morphology and functioning may be speculated upon according to the intensity of the inflammatory challenge. This hypothesis emerges from this review and requires further exploration.
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Affiliation(s)
- Geraldine Favrais
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
- Neonatology Unit, CHRU de Tours, Tours, France
- *Correspondence: Geraldine Favrais,
| | - Cindy Bokobza
- Inserm, NeuroDiderot, Université Paris Cité, Paris, France
| | - Elie Saliba
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
| | - Sylvie Chalon
- UMR 1253, iBrain, Inserm, Université de Tours, Tours, France
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2
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Namvarpour Z, Ranaei E, Amini A, Roudafshani Z, Fahanik-Babaei J. Effects of prenatal exposure to inflammation coupled with prepubertal stress on prefrontal white matter structure and related molecules in adult mouse offspring. Metab Brain Dis 2022; 37:1655-1668. [PMID: 35347584 DOI: 10.1007/s11011-022-00968-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Accepted: 03/21/2022] [Indexed: 11/28/2022]
Abstract
Maternal immune activation (MIA) by inflammatory agents such as lipopolysaccharide (LPS) and prepubertal stress (PS) may individually and collectively affect the central nervous system (CNS) during adulthood. Here, we intended to assess the effects of MIA, alone or combined with PS, on prefrontal white matter structure and its related molecules in adult mice offspring. Pregnant mice received either an i.p. dose of LPS (50 μg/kg) on gestational day 17 (GD17) or normal saline. Their pups were exposed to stress from postnatal days (PD) 30 to PD38 or no stress during prepubertal development. We randomly chose 56-day-old male offspring (n = 2 offspring per mother) from each group and isolated their prefrontal areas according to relevant protocols. The tissue samples were prepared for structural, histological, and molecular examinations. The LPS + stress group had evidence of increased damage in the white matter structures compared to the control, stress, and LPS groups (p < 0.05). The LPS + stress group also had significant downregulation of the genes involved in white matter formation (Sox10, Olig1, myelin regulatory factor, and Wnt compared with the control, stress, and LPS groups (p < 0.05). In conclusion, although each manipulation individually resulted in small changes in myelination, their combined effects were more pronounced. These changes were parallel to abnormal expression levels of the molecular factors that contribute to myelination.
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Affiliation(s)
- Zahra Namvarpour
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Institute for Cognitive Sciences Students (ICSS), Tehran, Iran
| | - Elahe Ranaei
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abdollah Amini
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Zahra Roudafshani
- Department of Biology and Anatomical Sciences, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Central Lab, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Javad Fahanik-Babaei
- Electrophysiology Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, 1985717443, Tehran, Iran
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3
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Thompson KK, Tsirka SE. Guanabenz modulates microglia and macrophages during demyelination. Sci Rep 2020; 10:19333. [PMID: 33168944 PMCID: PMC7653931 DOI: 10.1038/s41598-020-76383-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Accepted: 10/21/2020] [Indexed: 02/07/2023] Open
Abstract
Multiple sclerosis (MS) is an autoimmune disease characterized by infiltration of peripheral immune cells into the central nervous system, demyelination, and neuronal damage. There is no cure for MS, but available disease-modifying therapies can lessen severity and delay progression. However, current therapies are suboptimal due to adverse effects. Here, we investigate how the FDA-approved antihypertensive drug, guanabenz, which has a favorable safety profile and was recently reported to enhance oligodendrocyte survival, exerts effects on immune cells, specifically microglia and macrophages. We first employed the experimental autoimmune encephalomyelitis (EAE) model and observed pronounced immunomodulation evident by a reduction in pro-inflammatory microglia and macrophages. When guanabenz was administered in the cuprizone model, in which demyelination is less dependent upon immune cells, we did not observe improvements in remyelination, oligodendrocyte numbers, and effects on microglial activation were less dramatic. Thus, guanabenz may be a promising therapeutic to minimize inflammation without exerting severe off-target effects.
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Affiliation(s)
- Kaitlyn Koenig Thompson
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY, 11794-8651, USA
| | - Stella E Tsirka
- Department of Pharmacological Sciences, Stony Brook University, Stony Brook, NY, 11794-8651, USA.
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4
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Leitner GR, Wenzel TJ, Marshall N, Gates EJ, Klegeris A. Targeting toll-like receptor 4 to modulate neuroinflammation in central nervous system disorders. Expert Opin Ther Targets 2019; 23:865-882. [PMID: 31580163 DOI: 10.1080/14728222.2019.1676416] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Introduction: Adverse immune activation contributes to many central nervous system (CNS) disorders. All main CNS cell types express toll-like receptor 4 (TLR 4). This receptor is critical for a myriad of immune functions such as cytokine secretion and phagocytic activity of microglia; however, imbalances in TLR 4 activation can contribute to the progression of neurodegenerative diseases. Areas covered: We considered available evidence implicating TLR 4 activation in the following CNS pathologies: Alzheimer's disease, Parkinson's disease, ischemic stroke, traumatic brain injury, multiple sclerosis, multiple systems atrophy, and Huntington's disease. We reviewed studies reporting effects of TLR 4-specific antagonists and agonists in models of peripheral and CNS diseases from the perspective of possible future use of TLR 4 ligands in CNS disorders. Expert opinion: TLR 4-specific antagonists could suppress neuroinflammation by reducing overproduction of inflammatory mediators; however, they may interfere with protein clearance mechanisms and myelination. Agonists that specifically activate myeloid differentiation primary-response protein 88 (MyD88)-independent pathway of TLR 4 signaling could facilitate beneficial glial phagocytic activity with limited activity as inducers of proinflammatory mediators. Deciphering the disease stage-specific involvement of TLR 4 in CNS pathologies is crucial for the future clinical development of TLR 4 agonists and antagonists.
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Affiliation(s)
- Gunnar R Leitner
- Department of Biology, University of British Columbia Okanagan Campus , Kelowna , British Columbia , Canada
| | - Tyler J Wenzel
- Department of Biology, University of British Columbia Okanagan Campus , Kelowna , British Columbia , Canada
| | - Nick Marshall
- Department of Biology, University of British Columbia Okanagan Campus , Kelowna , British Columbia , Canada
| | - Ellen J Gates
- Department of Biology, University of British Columbia Okanagan Campus , Kelowna , British Columbia , Canada
| | - Andis Klegeris
- Department of Biology, University of British Columbia Okanagan Campus , Kelowna , British Columbia , Canada
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5
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Gatkowska J, Wieczorek M, Dziadek B, Dzitko K, Dziadek J, Długońska H. Assessment of the antigenic and neuroprotective activity of the subunit anti-Toxoplasma vaccine in T. gondii experimentally infected mice. Vet Parasitol 2018; 254:82-94. [PMID: 29657017 DOI: 10.1016/j.vetpar.2018.02.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 02/22/2018] [Accepted: 02/28/2018] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate the immunogenic and immunoprotective activities and to determine the neuroprotective capacity of the tetravalent vaccine containing selected recombinant T. gondii antigens (ROP2 + ROP4 + SAG1 + MAG1) administered with safe adjuvants (MPL and alum) using male and female inbred mice. The tested antigenic combination provided partial protection against brain cyst formation, especially in males (reduction in cyst burden by 72%). The decrease in cyst burden was observed for the whole brain as well as for specified brain regions associated with natural defensive behaviors, emotion processing and integration of motor and sensory stimuli. The vaccine triggered a strong, specific immune response, regardless of sex, which was characterized by the antigen-specific in vitro synthesis of cytokines (IL-2, IFN-γ and IL-10) and in vivo production of systemic IgG1 and IgG2a immunoglobulins. Immunization prior to the parasite challenge seemed to influence T. gondii - associated behavioral and neurochemical changes, although the impact of vaccination strongly depended on sex and time post-infection. Interestingly, in the vaccinated and T. gondii infected mice there was a significant delay in the parasite-induced loss of aversion toward cat smell (cats are the definitive hosts of the parasite). The regained attraction toward feline scent in vaccinated males, observed during chronic parasite invasion, correlated with the increase in the dopamine metabolism.
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Affiliation(s)
- Justyna Gatkowska
- Department of Immunoparasitology, Faculty of Biology and Environmental Protection, University of Lodz, 90-237 Łódź, Banacha 12/16, Poland.
| | - Marek Wieczorek
- Department of Neurobiology, Faculty of Biology and Environmental Protection, University of Lodz, 90-236 Łódź, Pomorska 141/143, Poland.
| | - Bożena Dziadek
- Department of Immunoparasitology, Faculty of Biology and Environmental Protection, University of Lodz, 90-237 Łódź, Banacha 12/16, Poland.
| | - Katarzyna Dzitko
- Department of Immunoparasitology, Faculty of Biology and Environmental Protection, University of Lodz, 90-237 Łódź, Banacha 12/16, Poland.
| | - Jarosław Dziadek
- Institute of Medical Biology, Polish Academy of Sciences, 93-232 Łódź, Lodowa 106, Poland.
| | - Henryka Długońska
- Department of Immunoparasitology, Faculty of Biology and Environmental Protection, University of Lodz, 90-237 Łódź, Banacha 12/16, Poland.
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6
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Beckmann N, Giorgetti E, Neuhaus A, Zurbruegg S, Accart N, Smith P, Perdoux J, Perrot L, Nash M, Desrayaud S, Wipfli P, Frieauff W, Shimshek DR. Brain region-specific enhancement of remyelination and prevention of demyelination by the CSF1R kinase inhibitor BLZ945. Acta Neuropathol Commun 2018; 6:9. [PMID: 29448957 PMCID: PMC5815182 DOI: 10.1186/s40478-018-0510-8] [Citation(s) in RCA: 89] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 01/26/2018] [Indexed: 11/10/2022] Open
Abstract
Multiple sclerosis (MS) is a chronic inflammatory disease affecting the central nervous system (CNS). While multiple effective immunomodulatory therapies for MS exist today, they lack the scope of promoting CNS repair, in particular remyelination. Microglia play a pivotal role in regulating myelination processes, and the colony-stimulating factor 1 (CSF-1) pathway is a key regulator for microglia differentiation and survival. Here, we investigated the effects of the CSF-1 receptor kinase inhibitor, BLZ945, on central myelination processes in the 5-week murine cuprizone model by non-invasive and longitudinal magnetic resonance imaging (MRI) and histology. Therapeutic 2-week BLZ945 treatment caused a brain region-specific enhancement of remyelination in the striatum/cortex, which was absent in the corpus callosum/external capsule. This beneficial effect correlated positively with microglia reduction, increased oligodendrocytes and astrogliosis. Prophylactic BLZ945 treatment prevented excessive demyelination in the corpus callosum by reducing microglia and increasing oligondendrocytes. In the external capsule oligodendrocytes were depleted but not microglia and a buildup of myelin debris and axonal damage was observed. A similar microglial dysfunction in the external capsule with an increase of myelin debris was obvious in triggering receptor expressed on myeloid cells 2 (TREM2) knock-out mice treated with cuprizone. Finally, therapeutic BLZ945 treatment did not change the disease course in experimental autoimmune encephalomyelitis mice, a peripherally driven neuroinflammation model. Taken together, our data suggest that a short-term therapeutic inhibition of the CSF-1 receptor pathway by BLZ945 in the murine cuprizone model enhances central remyelination by modulating neuroinflammation. Thus, microglia-modulating therapies could be considered clinically for promoting myelination in combination with standard-of-care treatments in MS patients.
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Affiliation(s)
- Nicolau Beckmann
- Musculoskeletal Diseases Area, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Elisa Giorgetti
- Musculoskeletal Diseases Area, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Anna Neuhaus
- Neuroscience, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Stefan Zurbruegg
- Neuroscience, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Nathalie Accart
- Musculoskeletal Diseases Area, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Paul Smith
- Autoimmunity, Transplantation and Inflammation, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
- Present address: Incyte, 1801 Augustine Cut-off, Wilmington, DE, 19803, USA
| | - Julien Perdoux
- Autoimmunity, Transplantation and Inflammation, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Ludovic Perrot
- Global Scientific Operations, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Mark Nash
- Musculoskeletal Diseases Area, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Sandrine Desrayaud
- PK Sciences, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Peter Wipfli
- PK Sciences, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Wilfried Frieauff
- Preclinical Safety, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland
| | - Derya R Shimshek
- Neuroscience, Novartis Institutes for BioMedical Research, 4002, Basel, Switzerland.
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7
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Sun ZY, Gu HS, Chen X, Zhang L, Li XM, Zhang JW, Li L. A novel flavanone derivative ameliorates cuprizone-induced behavioral changes and white matter pathology in the brain of mice. Psychiatry Res 2017; 257:249-259. [PMID: 28783571 DOI: 10.1016/j.psychres.2017.07.075] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2017] [Revised: 07/04/2017] [Accepted: 07/30/2017] [Indexed: 11/24/2022]
Abstract
Recent studies have shown that white matter lesions play an important role in the pathogenesis of schizophrenia. DHF-6 is a novel flavanone derivative synthesized in our laboratory. The purpose of the present study was to investigate the effects of DHF-6 on behavioral changes and white matter pathology in a 0.2% cuprizone-fed C57BL/6 mice model. The results showed that cuprizone induced a decrease in spontaneous alternations in the Y-maze test, an increase in locomotor activity in the open field test, demyelination determined by electron microscopy, a decline in the expression of myelin basic protein (MBP), a decrease in the differentiation of oligodendrocyte precursor cells (OPCs) into mature oligodendrocytes (OLs), and an activation of microglia and astrocytes in the corpus callosum measured by western blot and/or immunocytochemical analyses. Intragastric administration of DHF-6 (25 and 50mg/kg) for 5-weeks increased the spontaneous alternations, reduced locomotor activity, reversed demyelination and MBP decrease, promoted OPCs differentiation into mature OLs, and inhibited the activation of microglia and astrocytes. These results suggest that DHF-6 may improve cognitive impairment and the positive symptoms of schizophrenia by alleviating white matter lesions via facilitating remyelination and inhibiting neuroinflammation, thus may be beneficial in the treatment of schizophrenia.
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Affiliation(s)
- Zheng-Yu Sun
- Department of Pharmacology, Xuanwu Hospital of Capital Medical University, Beijing Institute for Brain Disorders, Beijing Engineering Research Center for Nerve System Drugs, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Beijing 100053, China
| | - Hong-Shun Gu
- Department of Pharmacology, Xuanwu Hospital of Capital Medical University, Beijing Institute for Brain Disorders, Beijing Engineering Research Center for Nerve System Drugs, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Beijing 100053, China
| | - Xi Chen
- Department of Pharmacology, Xuanwu Hospital of Capital Medical University, Beijing Institute for Brain Disorders, Beijing Engineering Research Center for Nerve System Drugs, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Beijing 100053, China
| | - Lan Zhang
- Department of Pharmacology, Xuanwu Hospital of Capital Medical University, Beijing Institute for Brain Disorders, Beijing Engineering Research Center for Nerve System Drugs, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Beijing 100053, China
| | - Xin-Min Li
- Department of Psychiatry, University of Alberta, Edmonton, Alberta, Canada T6G 2R3
| | - Jian-Wei Zhang
- School of Chemical Biology and Pharmaceutical Sciences, Capital Medical University, Beijing 100069, China.
| | - Lin Li
- Department of Pharmacology, Xuanwu Hospital of Capital Medical University, Beijing Institute for Brain Disorders, Beijing Engineering Research Center for Nerve System Drugs, Key Laboratory for Neurodegenerative Diseases of Ministry of Education, Beijing 100053, China.
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8
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Mullin AP, Cui C, Wang Y, Wang J, Troy E, Caggiano AO, Parry TJ, Colburn RW, Pavlopoulos E. rHIgM22 enhances remyelination in the brain of the cuprizone mouse model of demyelination. Neurobiol Dis 2017; 105:142-155. [DOI: 10.1016/j.nbd.2017.05.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2016] [Revised: 05/04/2017] [Accepted: 05/29/2017] [Indexed: 02/02/2023] Open
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9
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The Effect of Stereotactic Injections on Demyelination and Remyelination: a Study in the Cuprizone Model. J Mol Neurosci 2017; 61:479-488. [PMID: 28124770 DOI: 10.1007/s12031-017-0888-y] [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: 12/20/2016] [Accepted: 01/13/2017] [Indexed: 12/11/2022]
Abstract
Remyelination is the natural repair mechanism in demyelinating disorders of the central nervous system (CNS) such as multiple sclerosis. Several animal models have been used to study demyelination and remyelination. Among toxic animal models, oral administration of the toxin cuprizone leads to white and gray matter demyelination. In contrast, focal demyelination models include the stereotactic application of a toxin such as lysolecithin or ethidium bromide. The injection procedure generates a local disruption of the blood-brain barrier (BBB) and might thus trigger a local inflammatory reaction and consequently may influence demyelination and remyelination. In order to study such consequences, we applied stereotactic injections in the cuprizone model where demyelination and remyelination are mediated independent of this procedure. Immunohistochemistry was performed to detect the presence of lymphocytes and activated glial cells in the injection area. Blood protein stainings were used to assess the integrity of the BBB and myelin staining to evaluate demyelination and remyelination processes. Stereotactic injection led to a local disruption of the BBB as shown by local extravasation of blood proteins. Along the injection canal, T and B lymphocytes could be detected and there was a tendency of a higher microgliosis and astrocytosis. However, these changes did not influence demyelination and remyelination processes at the site of injection, in the corpus callosum, or in the cerebral cortex. Our results suggest that a local stereotactic injection has no major impact on CNS demyelination and remyelination.
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10
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Creatine Enhances Mitochondrial-Mediated Oligodendrocyte Survival After Demyelinating Injury. J Neurosci 2017; 37:1479-1492. [PMID: 28069926 PMCID: PMC5299567 DOI: 10.1523/jneurosci.1941-16.2016] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 12/03/2016] [Accepted: 12/28/2016] [Indexed: 01/11/2023] Open
Abstract
Chronic oligodendrocyte loss, which occurs in the demyelinating disorder multiple sclerosis (MS), contributes to axonal dysfunction and neurodegeneration. Current therapies are able to reduce MS severity, but do not prevent transition into the progressive phase of the disease, which is characterized by chronic neurodegeneration. Therefore, pharmacological compounds that promote oligodendrocyte survival could be beneficial for neuroprotection in MS. Here, we investigated the role of creatine, an organic acid involved in adenosine triphosphate (ATP) buffering, in oligodendrocyte function. We found that creatine increased mitochondrial ATP production directly in oligodendrocyte lineage cell cultures and exerted robust protection on oligodendrocytes by preventing cell death in both naive and lipopolysaccharide-treated mixed glia. Moreover, lysolecithin-mediated demyelination in mice deficient in the creatine-synthesizing enzyme guanidinoacetate-methyltransferase (Gamt) did not affect oligodendrocyte precursor cell recruitment, but resulted in exacerbated apoptosis of regenerated oligodendrocytes in central nervous system (CNS) lesions. Remarkably, creatine administration into Gamt-deficient and wild-type mice with demyelinating injury reduced oligodendrocyte apoptosis, thereby increasing oligodendrocyte density and myelin basic protein staining in CNS lesions. We found that creatine did not affect the recruitment of macrophages/microglia into lesions, suggesting that creatine affects oligodendrocyte survival independently of inflammation. Together, our results demonstrate a novel function for creatine in promoting oligodendrocyte viability during CNS remyelination.SIGNIFICANCE STATEMENT We report that creatine enhances oligodendrocyte mitochondrial function and protects against caspase-dependent oligodendrocyte apoptosis during CNS remyelination. This work has important implications for the development of therapeutic targets for diseases characterized by oligodendrocyte death, including multiple sclerosis.
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11
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Salinas Tejedor L, Berner G, Jacobsen K, Gudi V, Jungwirth N, Hansmann F, Gingele S, Prajeeth CK, Baumgärtner W, Hoffmann A, Skripuletz T, Stangel M. Mesenchymal stem cells do not exert direct beneficial effects on CNS remyelination in the absence of the peripheral immune system. Brain Behav Immun 2015; 50:155-165. [PMID: 26140734 DOI: 10.1016/j.bbi.2015.06.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Revised: 06/17/2015] [Accepted: 06/29/2015] [Indexed: 12/25/2022] Open
Abstract
Remyelination is the natural repair mechanism in demyelinating disorders such as multiple sclerosis (MS) and it was proposed that it might protect from axonal loss. For unknown reasons, remyelination is often incomplete or fails in MS lesions and therapeutic treatments to enhance remyelination are not available. Recently, the transplantation of exogenous mesenchymal stem cells (MSC) has emerged as a promising tool to enhance repair processes. This included the animal model experimental autoimmune encephalomyelitis (EAE), a commonly used model for the autoimmune mechanisms of MS. However, in EAE it is not clear if the beneficial effect of MSC derives from a direct influence on brain resident cells or if this is an indirect phenomenon via modulation of the peripheral immune system. The aim of this study was to determine potential regenerative functions of MSC in the toxic cuprizone model of demyelination that allows studying direct effects on de- and remyelination without the influence of the peripheral immune system. MSC from three different species (human, murine, canine) were transplanted either intraventricularly into the cerebrospinal fluid or directly into the lesion of the corpus callosum at two time points: at the onset of oligodendrocyte progenitor cell (OPC) proliferation or the peak of OPC proliferation during cuprizone induced demyelination. Our results show that MSC did not exert any regenerative effects after cuprizone induced demyelination and oligodendrocyte loss. During remyelination, MSC did not influence the dynamics of OPC proliferation and myelin formation. In conclusion, MSC did not exert direct regenerative functions in a mouse model where peripheral immune cells and especially T lymphocytes do not play a role. We thus suggest that the peripheral immune system is required for MSC to exert their effects and this is independent from a direct influence of the central nervous system.
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Affiliation(s)
- Laura Salinas Tejedor
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany; Center for Systems Neuroscience, Hannover, Germany
| | - Gabriel Berner
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany
| | - Kristin Jacobsen
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany
| | - Viktoria Gudi
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany; Center for Systems Neuroscience, Hannover, Germany
| | - Nicole Jungwirth
- Center for Systems Neuroscience, Hannover, Germany; Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Florian Hansmann
- Center for Systems Neuroscience, Hannover, Germany; Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Stefan Gingele
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany
| | - Chittappen K Prajeeth
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany
| | - Wolfgang Baumgärtner
- Center for Systems Neuroscience, Hannover, Germany; Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Andrea Hoffmann
- Department of Orthopaedic Surgery, Hannover Medical School, Hannover, Germany
| | - Thomas Skripuletz
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany
| | - Martin Stangel
- Clinical Neuroimmunology and Neurochemistry, Department of Neurology, Hannover Medical School, Germany; Center for Systems Neuroscience, Hannover, Germany.
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12
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Steelman AJ. Infection as an Environmental Trigger of Multiple Sclerosis Disease Exacerbation. Front Immunol 2015; 6:520. [PMID: 26539193 PMCID: PMC4609887 DOI: 10.3389/fimmu.2015.00520] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 09/24/2015] [Indexed: 01/19/2023] Open
Abstract
Over the past several decades, significant advances have been made in identifying factors that contribute to the pathogenesis of multiple sclerosis (MS) and have culminated in the approval of some effective therapeutic strategies for disease intervention. However, the mechanisms by which environmental factors, such as infection, contribute to the pathogenesis and/or symptom exacerbation remain to be fully elucidated. Relapse frequency in MS patients contributes to neurological impairment and, in the initial phases of disease, serves as a predictor of poor disease prognosis. The purpose of this review is to examine the evidence that supports a role for peripheral infection in modulating the natural history of this disease. Evidence supporting a role for infection in promoting exacerbation in animal models of MS is also reviewed. Finally, a few mechanisms by which infection may exacerbate symptoms of MS and other neurological diseases are discussed. Those who comprise the majority of MS patients acquire approximately two upper-respiratory infections per year; furthermore, this type of infection doubles the risk for MS relapse, underscoring the contribution of this relationship as being potentially important and particularly detrimental.
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Affiliation(s)
- Andrew J Steelman
- Department of Animal Sciences, College of Agricultural, Consumer and Environmental Sciences, University of Illinois Urbana-Champaign , Urbana, IL , USA ; Neuroscience Program, University of Illinois Urbana-Champaign , Urbana, IL , USA ; Division of Nutritional Sciences, University of Illinois Urbana-Champaign , Urbana, IL , USA
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13
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Skripuletz T, Salinas Tejedor L, Prajeeth CK, Hansmann F, Chhatbar C, Kucman V, Zhang N, Raddatz BB, Detje CN, Sühs KW, Pul R, Gudi V, Kalinke U, Baumgärtner W, Stangel M. The antiviral drug ganciclovir does not inhibit microglial proliferation and activation. Sci Rep 2015; 5:14935. [PMID: 26447351 PMCID: PMC4597339 DOI: 10.1038/srep14935] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 09/11/2015] [Indexed: 01/15/2023] Open
Abstract
Ganciclovir is effective in the treatment of human infections with viruses of the Herpesviridae family. Beside antiviral properties, recently ganciclovir was described to inhibit microglial proliferation and disease severity of experimental autoimmune encephalomyelitis, an inflammatory model of multiple sclerosis. Microglial activation and proliferation are main characteristics of neuroinflammatory CNS diseases and inhibition of microglial functions might be beneficial in autoimmune diseases, or detrimental in infectious diseases. The objective of this study was to determine potential inhibitory effects of ganciclovir in three different murine animal models of CNS neuroinflammation in which microglia play an important role: Theiler´s murine encephalomyelitis, the cuprizone model of de- and remyelination, and the vesicular stomatitis virus encephalitis model. In addition, in vitro experiments with microglial cultures were performed to test the hypothesis that ganciclovir inhibits microglial proliferation. In all three animal models, neither microglial proliferation or recruitment nor disease activity was changed by ganciclovir. In vitro experiments confirmed that microglial proliferation was not affected by ganciclovir. In conclusion, our results show that the antiviral drug ganciclovir does not inhibit microglial activation and proliferation in the murine CNS.
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Affiliation(s)
| | - Laura Salinas Tejedor
- Department of Neurology, Hannover Medical School, Hannover, Germany.,Center for Systems Neuroscience, Hannover, Germany
| | | | - Florian Hansmann
- Center for Systems Neuroscience, Hannover, Germany.,Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Chintan Chhatbar
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research; a joint venture between the Helmholtz Centre for Infection Research and the Hannover Medical School, Hannover, Germany
| | - Valeria Kucman
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Ning Zhang
- Center for Systems Neuroscience, Hannover, Germany.,Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Barbara B Raddatz
- Center for Systems Neuroscience, Hannover, Germany.,Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Claudia N Detje
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research; a joint venture between the Helmholtz Centre for Infection Research and the Hannover Medical School, Hannover, Germany
| | | | - Refik Pul
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Viktoria Gudi
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Ulrich Kalinke
- Institute for Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research; a joint venture between the Helmholtz Centre for Infection Research and the Hannover Medical School, Hannover, Germany
| | - Wolfgang Baumgärtner
- Center for Systems Neuroscience, Hannover, Germany.,Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Martin Stangel
- Department of Neurology, Hannover Medical School, Hannover, Germany.,Center for Systems Neuroscience, Hannover, Germany
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14
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Fukushima S, Nishikawa K, Furube E, Muneoka S, Ono K, Takebayashi H, Miyata S. Oligodendrogenesis in the fornix of adult mouse brain; the effect of LPS-induced inflammatory stimulation. Brain Res 2015; 1627:52-69. [PMID: 26385416 DOI: 10.1016/j.brainres.2015.09.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 08/11/2015] [Accepted: 09/08/2015] [Indexed: 01/27/2023]
Abstract
Evidence have been accumulated that continuous oligodendrogenesis occurs in the adult mammalian brain. The fornix, projection and commissure pathway of hippocampal neurons, carries signals from the hippocampus to other parts of the brain and has critical role in memory and learning. However, basic characterization of adult oligodendrogenesis in this brain region is not well understood. In the present study, therefore, we aimed to examine the proliferation and differentiation of oligodendrocyte progenitor cells (OPCs) and the effect of acute inflammatory stimulation on oligodendrogenesis in the fornix of adult mouse. We demonstrated the proliferation of OPCs and a new generation of mature oligodendrocytes by using bromodeoxyuridine and Ki67 immunohistochemistry. Oligodendrogenesis of adult fornix was also demonstrated by using oligodendrocyte transcription factor 2 transgenic mouse. A single systemic administration of lipopolysaccharide (LPS) attenuated proliferation of OPCs in the fornix together with reduced proliferation of hippocampal neural stem/progenitor cells. Time course analysis showed that a single administration of LPS attenuated the proliferation of OPCs during 24-48 h. On the other hand, consecutive administration of LPS did not suppress proliferation of OPCs. The treatment of LPS did not affect differentiation of OPCs into mature oligodendrocytes. Treatment of a microglia inhibitor minocycline significantly attenuated basal proliferation of OPCs under normal condition. In conclusion, the present study indicates that continuous oligodendrogenesis occurs and a single administration of LPS transiently attenuates proliferation of OPCs without changing differentiation in the fornix of the adult mouse brains.
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Affiliation(s)
- Shohei Fukushima
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Kazunori Nishikawa
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Eriko Furube
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiori Muneoka
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Katsuhiko Ono
- Department of Biology, Kyoto Prefectural University of Medicine, Shimogamohangicho, Sakyo-ku, Kyoto 606-0823, Japan
| | - Hirohide Takebayashi
- Division of Neurobiology and Anatomy, Graduate School of Medical and Dental Sciences, Niigata University, Niigata, Japan
| | - Seiji Miyata
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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15
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Praet J, Guglielmetti C, Berneman Z, Van der Linden A, Ponsaerts P. Cellular and molecular neuropathology of the cuprizone mouse model: clinical relevance for multiple sclerosis. Neurosci Biobehav Rev 2015; 47:485-505. [PMID: 25445182 DOI: 10.1016/j.neubiorev.2014.10.004] [Citation(s) in RCA: 275] [Impact Index Per Article: 30.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 09/18/2014] [Accepted: 10/01/2014] [Indexed: 01/30/2023]
Abstract
The cuprizone mouse model allows the investigation of the complex molecular mechanisms behind nonautoimmune-mediated demyelination and spontaneous remyelination. While it is generally accepted that oligodendrocytes are specifically vulnerable to cuprizone intoxication due to their high metabolic demands, a comprehensive overview of the etiology of cuprizone-induced pathology is still missing to date. In this review we extensively describe the physico-chemical mode of action of cuprizone and discuss the molecular and enzymatic mechanisms by which cuprizone induces metabolic stress, oligodendrocyte apoptosis, myelin degeneration and eventually axonal and neuronal pathology. In addition, we describe the dual effector function of the immune system which tightly controls demyelination by effective induction of oligodendrocyte apoptosis, but in contrast also paves the way for fast and efficient remyelination by the secretion of neurotrophic factors and the clearance of cellular and myelinic debris. Finally, we discuss the many clinical symptoms that can be observed following cuprizone treatment, and how these strengthened the cuprizone model as a useful tool to study human multiple sclerosis, schizophrenia and epilepsy.
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16
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Anatomical Distribution of Cuprizone-Induced Lesions in C57BL6 Mice. J Mol Neurosci 2015; 57:166-75. [DOI: 10.1007/s12031-015-0595-5] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 06/02/2015] [Indexed: 12/19/2022]
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17
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Fukushima S, Furube E, Itoh M, Nakashima T, Miyata S. Robust increase of microglia proliferation in the fornix of hippocampal axonal pathway after a single LPS stimulation. J Neuroimmunol 2015. [PMID: 26198916 DOI: 10.1016/j.jneuroim.2015.05.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Microglia are resident immunocompetent cells having important roles in innate immunity in the brains. In the present study, we found that a single lipopolysaccharide (LPS) administration significantly increased microglial proliferation in the fornix and dentate gyrus (DG) but not the cerebral cortex and corpus callosum of adult mice. LPS-induced microglial proliferation was especially robust at the white matter of the fornix. The density of microglia increased in the fornix and DG for roughly one week and returned to basal levels at least 20days after a single LPS administration. Consecutive LPS administration did not induce such dramatic increase of microglial proliferation in the fornix. The inhibition of vascular endothelial growth factor signaling by AZD2171 largely suppressed LPS-induced increase of microglial proliferation in the fornix. In conclusion, the present study indicates that the hippocampal neuronal system has a higher proliferative microglial capability against LPS-induced inflammatory administration compared with other brain regions.
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Affiliation(s)
- Shohei Fukushima
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Eriko Furube
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Masanobu Itoh
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Toshihiro Nakashima
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Seiji Miyata
- Department of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
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18
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Dimou L, Götz M. Glial cells as progenitors and stem cells: new roles in the healthy and diseased brain. Physiol Rev 2014; 94:709-37. [PMID: 24987003 DOI: 10.1152/physrev.00036.2013] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The diverse functions of glial cells prompt the question to which extent specific subtypes may be devoted to a specific function. We discuss this by reviewing one of the most recently discovered roles of glial cells, their function as neural stem cells (NSCs) and progenitor cells. First we give an overview of glial stem and progenitor cells during development; these are the radial glial cells that act as NSCs and other glial progenitors, highlighting the distinction between the lineage of cells in vivo and their potential when exposed to a different environment, e.g., in vitro. We then proceed to the adult stage and discuss the glial cells that continue to act as NSCs across vertebrates and others that are more lineage-restricted, such as the adult NG2-glia, the most frequent progenitor type in the adult mammalian brain, that remain within the oligodendrocyte lineage. Upon certain injury conditions, a distinct subset of quiescent astrocytes reactivates proliferation and a larger potential, clearly demonstrating the concept of heterogeneity with distinct subtypes of, e.g., astrocytes or NG2-glia performing rather different roles after brain injury. These new insights not only highlight the importance of glial cells for brain repair but also their great potential in various aspects of regeneration.
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Affiliation(s)
- Leda Dimou
- Physiological Genomics, Institute of Physiology, Ludwig-Maximilians University, Munich, Germany; Institute for Stem Cell Research, HelmholtzZentrum, Neuherberg, Germany; and Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
| | - Magdalena Götz
- Physiological Genomics, Institute of Physiology, Ludwig-Maximilians University, Munich, Germany; Institute for Stem Cell Research, HelmholtzZentrum, Neuherberg, Germany; and Munich Cluster for Systems Neurology (SyNergy), Munich, Germany
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19
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Bénardais K, Gudi V, Gai L, Neßler J, Singh V, Prajeeth CK, Skripuletz T, Stangel M. Long-term impact of neonatal inflammation on demyelination and remyelination in the central nervous system. Glia 2014; 62:1659-70. [PMID: 24909143 DOI: 10.1002/glia.22706] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2014] [Revised: 05/21/2014] [Accepted: 05/23/2014] [Indexed: 12/12/2022]
Abstract
Perinatal inflammation causes immediate changes of the blood-brain barrier (BBB) and thus may have different consequences in adult life including an impact on neurological diseases such as demyelinating disorders. In order to determine if such a perinatal insult affects the course of demyelination in adulthood as "second hit," we simulated perinatal bacterial inflammation by systemic administration of lipopolysaccharide (LPS) to either pregnant mice or newborn animals. Demyelination was later induced in adult animals by cuprizone [bis(cyclohexylidenehydrazide)], which causes oligodendrocyte death with subsequent demyelination accompanied by strong microgliosis and astrogliosis. A single LPS injection at embryonic day 13.5 did not have an impact on demyelination in adulthood. In contrast, serial postnatal LPS injections (P0-P8) caused an early delay of myelin removal in the corpus callosum, which was paralleled by reduced numbers of activated microglia. During remyelination, postnatal LPS treatment enhanced early remyelination with a concomitant increase of mature oligodendrocytes. Furthermore, the postnatal LPS challenge impacts the phenotype of microglia since an elevated mRNA expression of microglia related genes such as TREM 2, CD11b, TNF-α, TGF-β1, HGF, FGF-2, and IGF-1 was found in these preconditioned mice during early demyelination. These data demonstrate that postnatal inflammation has long-lasting effects on microglia functions and modifies the course of demyelination and remyelination in adulthood.
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Affiliation(s)
- Karelle Bénardais
- Department of Neurology, Hannover Medical School, Hannover, Germany; Center for Systems Neuroscience, Hannover, Germany
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20
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Plemel JR, Keough MB, Duncan GJ, Sparling JS, Yong VW, Stys PK, Tetzlaff W. Remyelination after spinal cord injury: Is it a target for repair? Prog Neurobiol 2014; 117:54-72. [DOI: 10.1016/j.pneurobio.2014.02.006] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Revised: 02/15/2014] [Accepted: 02/20/2014] [Indexed: 12/12/2022]
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21
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Gudi V, Gingele S, Skripuletz T, Stangel M. Glial response during cuprizone-induced de- and remyelination in the CNS: lessons learned. Front Cell Neurosci 2014; 8:73. [PMID: 24659953 PMCID: PMC3952085 DOI: 10.3389/fncel.2014.00073] [Citation(s) in RCA: 248] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 02/19/2014] [Indexed: 12/21/2022] Open
Abstract
Although astrogliosis and microglia activation are characteristic features of multiple sclerosis (MS) and other central nervous system (CNS) lesions the exact functions of these events are not fully understood. Animal models help to understand the complex interplay between the different cell types of the CNS and uncover general mechanisms of damage and repair of myelin sheaths. The so called cuprizone model is a toxic model of demyelination in the CNS white and gray matter, which lacks an autoimmune component. Cuprizone induces apoptosis of mature oligodendrocytes that leads to a robust demyelination and profound activation of both astrocytes and microglia with regional heterogeneity between different white and gray matter regions. Although not suitable to study autoimmune mediated demyelination, this model is extremely helpful to elucidate basic cellular and molecular mechanisms during de- and particularly remyelination independently of interactions with peripheral immune cells. Phagocytosis and removal of damaged myelin seems to be one of the major roles of microglia in this model and it is well known that removal of myelin debris is a prerequisite of successful remyelination. Furthermore, microglia provide several signals that support remyelination. The role of astrocytes during de- and remyelination is not well defined. Both supportive and destructive functions have been suggested. Using the cuprizone model we could demonstrate that there is an important crosstalk between astrocytes and microglia. In this review we focus on the role of glial reactions and interaction in the cuprizone model. Advantages and limitations of as well as its potential therapeutic relevance for the human disease MS are critically discussed in comparison to other animal models.
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Affiliation(s)
- Viktoria Gudi
- Department of Neurology, Hannover Medical SchoolHannover, Germany
| | - Stefan Gingele
- Department of Neurology, Hannover Medical SchoolHannover, Germany
| | | | - Martin Stangel
- Department of Neurology, Hannover Medical SchoolHannover, Germany
- Center for Systems NeuroscienceHannover, Germany
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22
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O’Driscoll CM, Kaufmann WE, Bressler JP. MeCP2 deficiency enhances glutamate release through NF-κB signaling in myeloid derived cells. J Neuroimmunol 2013; 265:61-7. [DOI: 10.1016/j.jneuroim.2013.09.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Revised: 08/12/2013] [Accepted: 09/05/2013] [Indexed: 01/18/2023]
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23
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Nessler J, Bénardais K, Gudi V, Hoffmann A, Salinas Tejedor L, Janßen S, Prajeeth CK, Baumgärtner W, Kavelaars A, Heijnen CJ, van Velthoven C, Hansmann F, Skripuletz T, Stangel M. Effects of murine and human bone marrow-derived mesenchymal stem cells on cuprizone induced demyelination. PLoS One 2013; 8:e69795. [PMID: 23922802 PMCID: PMC3724887 DOI: 10.1371/journal.pone.0069795] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Accepted: 06/17/2013] [Indexed: 11/24/2022] Open
Abstract
For the treatment of patients with multiple sclerosis there are no regenerative approaches to enhance remyelination. Mesenchymal stem cells (MSC) have been proposed to exert such regenerative functions. Intravenous administration of human MSC reduced the clinical severity of experimental autoimmune encephalomyelitis (EAE), an animal model mimicking some aspects of multiple sclerosis. However, it is not clear if this effect was achieved by systemic immunomodulation or if there is an active neuroregeneration in the central nervous system (CNS). In order to investigate remyelination and regeneration in the CNS we analysed the effects of intravenously and intranasally applied murine and human bone marrow-derived MSC on cuprizone induced demyelination, a toxic animal model which allows analysis of remyelination without the influence of the peripheral immune system. In contrast to EAE no effects of MSC on de- and remyelination and glial cell reactions were found. In addition, neither murine nor human MSC entered the lesions in the CNS in this toxic model. In conclusion, MSC are not directed into CNS lesions in the cuprizone model where the blood-brain-barrier is intact and thus cannot provide support for regenerative processes.
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Affiliation(s)
- Jasmin Nessler
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Karelle Bénardais
- Department of Neurology, Hannover Medical School, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
| | - Viktoria Gudi
- Department of Neurology, Hannover Medical School, Hannover, Germany
| | - Andrea Hoffmann
- Department of Trauma Surgery, Hannover Medical School, Hannover, Germany
| | - Laura Salinas Tejedor
- Department of Neurology, Hannover Medical School, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
| | - Stefanie Janßen
- Department of Neurology, Hannover Medical School, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
| | | | - Wolfgang Baumgärtner
- Center for Systems Neuroscience, Hannover, Germany
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Annemieke Kavelaars
- Department of Symptom Research, University of Texas, M.D. Anderson Cancer Center, Houston, Texas, United States of America
- Laboratory for Neuroimmunology and Developmental Origins of Disease, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Cobi J. Heijnen
- Department of Symptom Research, University of Texas, M.D. Anderson Cancer Center, Houston, Texas, United States of America
- Laboratory for Neuroimmunology and Developmental Origins of Disease, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Cindy van Velthoven
- Laboratory for Neuroimmunology and Developmental Origins of Disease, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Florian Hansmann
- Department of Pathology, University of Veterinary Medicine Hannover, Hannover, Germany
| | | | - Martin Stangel
- Department of Neurology, Hannover Medical School, Hannover, Germany
- Center for Systems Neuroscience, Hannover, Germany
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24
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Murta V, Ferrari CC. Influence of Peripheral inflammation on the progression of multiple sclerosis: Evidence from the clinic and experimental animal models. Mol Cell Neurosci 2013; 53:6-13. [DOI: 10.1016/j.mcn.2012.06.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Revised: 06/14/2012] [Accepted: 06/26/2012] [Indexed: 12/21/2022] Open
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25
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Skripuletz T, Hackstette D, Bauer K, Gudi V, Pul R, Voss E, Berger K, Kipp M, Baumgärtner W, Stangel M. Astrocytes regulate myelin clearance through recruitment of microglia during cuprizone-induced demyelination. ACTA ACUST UNITED AC 2012; 136:147-67. [PMID: 23266461 DOI: 10.1093/brain/aws262] [Citation(s) in RCA: 265] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Recent evidence suggests that astrocytes play an important role in regulating de- and remyelination in multiple sclerosis. The role of astrocytes is controversial, and both beneficial as well as detrimental effects are being discussed. We performed loss-of-function studies based on astrocyte depletion in a cuprizone-induced rodent model of demyelination. This led to strong astrogliosis accompanied by microgliosis and demyelination in C57BL/6 wild-type mice. Ablation of astrocytes in glial fibrillary acidic protein-thymidine kinase transgenic mice was associated with a failure of damaged myelin removal and a consecutive delay in remyelination. Despite oligodendrocyte death, myelin was still present, but ultrastructual investigations showed that the myelin structure was loosened and this damaged myelin did not protect axons. These alterations were associated with a decrease in microglial activation. Thus, our results show that astrocyte loss does not prevent myelin damage, but clearance of damaged myelin through recruitment of microglia is impaired. Further studies suggest that this process is regulated by the chemokine CXCL10. As a consequence of the delayed removal of myelin debris, remyelination and oligodendrocyte precursor cell proliferation were impaired. Experiments omitting the influence of myelin debris demonstrated an additional beneficial effect of astrocytes on oligodendrocyte regeneration during remyelination. In conclusion, these data demonstrate for the first time in vivo that astrocytes provide the signal environment that forms the basis for the recruitment of microglia to clear myelin debris, a process required for subsequent repair mechanisms. This is of great importance to understanding regenerative processes in demyelinating diseases such as multiple sclerosis.
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Affiliation(s)
- Thomas Skripuletz
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str-1, 30625 Hannover, Germany
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