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Marangon D, Castro e Silva JH, Cerrato V, Boda E, Lecca D. Oligodendrocyte Progenitors in Glial Scar: A Bet on Remyelination. Cells 2024; 13:1024. [PMID: 38920654 PMCID: PMC11202012 DOI: 10.3390/cells13121024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/07/2024] [Accepted: 06/10/2024] [Indexed: 06/27/2024] Open
Abstract
Oligodendrocyte progenitor cells (OPCs) represent a subtype of glia, giving rise to oligodendrocytes, the myelin-forming cells in the central nervous system (CNS). While OPCs are highly proliferative during development, they become relatively quiescent during adulthood, when their fate is strictly influenced by the extracellular context. In traumatic injuries and chronic neurodegenerative conditions, including those of autoimmune origin, oligodendrocytes undergo apoptosis, and demyelination starts. Adult OPCs become immediately activated; they migrate at the lesion site and proliferate to replenish the damaged area, but their efficiency is hampered by the presence of a glial scar-a barrier mainly formed by reactive astrocytes, microglia and the deposition of inhibitory extracellular matrix components. If, on the one hand, a glial scar limits the lesion spreading, it also blocks tissue regeneration. Therapeutic strategies aimed at reducing astrocyte or microglia activation and shifting them toward a neuroprotective phenotype have been proposed, whereas the role of OPCs has been largely overlooked. In this review, we have considered the glial scar from the perspective of OPCs, analysing their behaviour when lesions originate and exploring the potential therapies aimed at sustaining OPCs to efficiently differentiate and promote remyelination.
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Affiliation(s)
- Davide Marangon
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmaceutical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (D.M.); (J.H.C.e.S.)
| | - Juliana Helena Castro e Silva
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmaceutical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (D.M.); (J.H.C.e.S.)
| | - Valentina Cerrato
- Department of Neuroscience Rita Levi-Montalcini, University of Turin, 10126 Turin, Italy; (V.C.); (E.B.)
- Neuroscience Institute Cavalieri Ottolenghi, Regione Gonzole 10, 10043 Orbassano, Turin, Italy
| | - Enrica Boda
- Department of Neuroscience Rita Levi-Montalcini, University of Turin, 10126 Turin, Italy; (V.C.); (E.B.)
- Neuroscience Institute Cavalieri Ottolenghi, Regione Gonzole 10, 10043 Orbassano, Turin, Italy
| | - Davide Lecca
- Laboratory of Molecular and Cellular Pharmacology of Purinergic Transmission, Department of Pharmaceutical Sciences, Università degli Studi di Milano, 20133 Milan, Italy; (D.M.); (J.H.C.e.S.)
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Faraji J, Bettenson D, Yong VW, Metz GAS. Early life stress aggravates disease pathogenesis in mice with experimental autoimmune encephalomyelitis: Support for a two-hit hypothesis of multiple sclerosis etiology. J Neuroimmunol 2023; 385:578240. [PMID: 37951203 DOI: 10.1016/j.jneuroim.2023.578240] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/27/2023] [Accepted: 11/05/2023] [Indexed: 11/13/2023]
Abstract
Vision problems are one of the earliest diagnosed symptoms of multiple sclerosis (MS). The onset and progression of vision loss and the underlying pathogenesis in MS may be influenced by cumulative psychophysiological stress. Here, we used a two-hit model of stress in female mice to determine if early life stress (ELS, the first hit) influences the response to an immunization that induces experimental autoimmune encephalomyelitis (EAE, the second hit) later in life. We hypothesized that ELS caused by animal transportation from a vendor during early postnatal development represents a co-factor which can exacerbate the clinical severity of EAE. Indeed, adult EAE mice with a history of ELS displayed more severe clinical signs and delayed recovery compared to non-stressed EAE mice. ELS also diminished visual acuity measured by optokinetic responses, as well as locomotion and exploratory behaviours in EAE mice. Notably, ELS accelerated vision loss and caused earlier onset of visual impairments in EAE. Exacerbated functional impairments in stressed EAE mice were highly correlated with circulating corticosterone levels. The findings show that the progression of induced EAE in adulthood can be significantly impacted by adverse early life experiences. These observations emphasize the importance of comprehensive behavioural testing, including non-motor functions, to enhance the translational value of preclinical animal models of MS. Moreover, shipment stress of laboratory animals should be considered a necessary variable in preclinical MS research. The consideration of cumulative lifetime stresses provides a new perspective of MS pathogenesis within a personalized medicine framework.
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Affiliation(s)
- Jamshid Faraji
- Canadian Centre for Behavioural Neuroscience, Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada.
| | - Dennis Bettenson
- Canadian Centre for Behavioural Neuroscience, Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada
| | - V Wee Yong
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta T2N 4N1, Canada
| | - Gerlinde A S Metz
- Canadian Centre for Behavioural Neuroscience, Department of Neuroscience, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada; Southern Alberta Genome Sciences Centre, University of Lethbridge, Lethbridge, Alberta T1K 3M4, Canada.
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Liang Y, Kang X, Zhang H, Xu H, Wu X. Knockdown and inhibition of hippocampal GPR17 attenuates lipopolysaccharide-induced cognitive impairment in mice. J Neuroinflammation 2023; 20:271. [PMID: 37990234 PMCID: PMC10662506 DOI: 10.1186/s12974-023-02958-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 11/13/2023] [Indexed: 11/23/2023] Open
Abstract
BACKGROUND Previously we reported that inhibition of GPR17 prevents amyloid β 1-42 (Aβ1-42)-induced cognitive impairment in mice. However, the role of GPR17 on cognition is still largely unknown. METHODS Herein, we used a mouse model of cognitive impairment induced by lipopolysaccharide (LPS) to further investigate the role of GPR17 in cognition and its potential mechanism. The mice were pretreated with GPR17 shRNA lentivirus and cangrelor by microinjection into the dentate gyrus (DG) region of the hippocampus. After 21 days, LPS (0.25 mg/kg, i.p.) was administered for 7 days. Animal behavioral tests as well as pathological and biochemical assays were performed to evaluate the cognitive function in mice. RESULTS LPS exposure resulted in a significant increase in GPR17 expression at both protein and mRNA levels in the hippocampus. Gene reduction and pharmacological blockade of GPR17 improved cognitive impairment in both the Morris water maze and novel object recognition tests. Knockdown and inhibition of GPR17 inhibited Aβ production, decreased the expression of NF-κB p65, increased CREB phosphorylation and elevated BDNF expression, suppressed the accumulation of pro-inflammatory cytokines, inhibited Glial cells (microglia and astrocytes) activation, and increased Bcl-2, PSD-95, and SYN expression, reduced Bax expression as well as decreased caspase-3 activity and TUNEL-positive cells in the hippocampus of LPS-treated mice. Notably, knockdown and inhibition of GPR17 not only provided protective effects against cholinergic dysfunction but also facilitated the regulation of oxidative stress. In addition, cangrelor pretreatment can effectively inhibit the expression of inflammatory cytokines by suppressing NF-κB/CREB/BDNF signaling in BV-2 cells stimulated by LPS. However, activation of hippocampal GPR17 with MDL-29951 induced cognitive impairment in normal mice. CONCLUSIONS These observations indicate that GPR17 may possess a neuroprotective effect against LPS-induced cognition deficits, and neuroinflammation by modulation of NF-κB/CREB/BDNF signaling in mice, indicating that GPR17 may be a promising new target for the prevention and treatment of AD.
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Affiliation(s)
- Yusheng Liang
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, 230032, China
- Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, China
| | - Xu Kang
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, 230032, China
- Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, China
| | - Haiwang Zhang
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, 230032, China
- Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, China
| | - Heng Xu
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, 230032, China
- Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, China
| | - Xian Wu
- Anhui Province Key Laboratory of Major Autoimmune Diseases, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, 230032, China.
- Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Hefei, 230032, China.
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Berger M, Guiraud L, Dumas A, Sagnat D, Payros G, Rolland C, Vergnolle N, Deraison C, Cenac N, Racaud-Sultan C. Prenatal stress induces changes in PAR2- and M3-dependent regulation of colon primitive cells. Am J Physiol Gastrointest Liver Physiol 2022; 323:G609-G626. [PMID: 36283083 PMCID: PMC9722261 DOI: 10.1152/ajpgi.00061.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Prenatal stress is associated with a high risk of developing adult intestinal pathologies, such as irritable bowel syndrome, chronic inflammation, and cancer. Although epithelial stem cells and progenitors have been implicated in intestinal pathophysiology, how prenatal stress could impact their functions is still unknown. We have investigated the proliferative and differentiation capacities of primitive cells using epithelial crypts isolated from colons of adult male and female mice whose mothers have been stressed during late gestation. Our results show that stem cell/progenitor proliferation and differentiation in vitro are negatively impacted by prenatal stress in male progeny. This is promoted by a reinforcement of the negative proliferative/differentiation control by the protease-activated receptor 2 (PAR2) and the muscarinic receptor 3 (M3), two G protein-coupled receptors present in the crypt. Conversely, prenatal stress does not change in vitro proliferation of colon primitive cells in female progeny. Importantly, this maintenance is associated with a functional switch in the M3 negative control of colonoid growth, becoming proliferative after prenatal stress. In addition, the proliferative role of PAR2 specific to females is maintained under prenatal stress, even though PAR2-targeted stress signals Dusp6 and activated GSK3β are increased, reaching the levels of males. An epithelial serine protease could play a critical role in the activation of the survival kinase GSK3β in colonoids from prenatally stressed female progeny. Altogether, our results show that following prenatal stress, colon primitive cells cope with stress through sexually dimorphic mechanisms that could pave the way to dysregulated crypt regeneration and intestinal pathologies.NEW & NOTEWORTHY Primitive cells isolated from mouse colon following prenatal stress and exposed to additional stress conditions such as in vitro culture, present sexually dimorphic mechanisms based on PAR2- and M3-dependent regulation of proliferation and differentiation. Whereas prenatal stress reinforces the physiological negative control exerted by PAR2 and M3 in crypts from males, in females, it induces a switch in M3- and PAR2-dependent regulation leading to a resistant and proliferative phenotype of progenitor.
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Affiliation(s)
- Mathieu Berger
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Laura Guiraud
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Alexia Dumas
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - David Sagnat
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Gaëlle Payros
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Corinne Rolland
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Nathalie Vergnolle
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France,2Department of Physiology and Pharmacology, Cumming School of
Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Céline Deraison
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Nicolas Cenac
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
| | - Claire Racaud-Sultan
- 1Institut de Recherche en Santé Digestive, INSERM U1220, Institut
National de Recherche pour l’Agriculture, l’Alimentation et
l’Environnement, Ecole Nationale Vétérinaire de Toulouse, University of Toulouse, Toulouse, France
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The Distribution of GPR17-Expressing Cells Correlates with White Matter Inflammation Status in Brain Tissues of Multiple Sclerosis Patients. Int J Mol Sci 2021; 22:ijms22094574. [PMID: 33925469 PMCID: PMC8123849 DOI: 10.3390/ijms22094574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 01/26/2023] Open
Abstract
In multiple sclerosis (MS), oligodendrocyte precursor cells (OPCs) are recruited to the site of injury to remyelinate damaged axons; however, in patients this process is often ineffective due to defects in OPC maturation. The membrane receptor GPR17 timely regulates the early stages of OPC differentiation; however, after reaching its highest levels in immature oligodendrocytes, it has to be downregulated to allow terminal maturation. Since, in several animal models of disease GPR17 is upregulated, the aim of this work was to characterize GPR17 alterations in MS patients. We developed immunohistochemistry and immunofluorescence procedures for the detection of GPR17 in human tissues and stained post-mortem MS brain lesions from patients with secondary progressive MS and control subjects. The inflammatory activity in each lesion was evaluated by immunohistochemistry for the myelin protein MOG and the HLA antigen to classify them as active, chronic inactive or chronic active. Hence, we assessed the distribution of GPR17-positive cells in these lesions compared to normal appearing white matter (NAWM) and white matter (WM) of control subjects. Our data have shown a marked increase of GPR17-expressing oligodendroglial cells accumulating at NAWM, in which moderate inflammation was also found. Furthermore, we identified two distinct subpopulations of GPR17-expressing oligodendroglial cells, characterized by either ramified or rounded morphology, that differently populate the WM of healthy controls and MS patients. We concluded that the coordinated presence of GPR17 in OPCs at the lesion sites and inflamed NAWM areas suggests that GPR17 could be exploited to support endogenous remyelination through advanced pharmacological approaches.
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