1
|
Caratis F, Opiełka M, Hausmann M, Velasco-Estevez M, Rojek B, de Vallière C, Seuwen K, Rogler G, Karaszewski B, Rutkowska A. The proton-sensing receptors TDAG8 and GPR4 are differentially expressed in human and mouse oligodendrocytes: Exploring their role in neuroinflammation and multiple sclerosis. PLoS One 2024; 19:e0283060. [PMID: 38527054 PMCID: PMC10962805 DOI: 10.1371/journal.pone.0283060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 02/13/2024] [Indexed: 03/27/2024] Open
Abstract
Acidosis is one of the hallmarks of demyelinating central nervous system (CNS) lesions in multiple sclerosis (MS). The response to acidic pH is primarily mediated by a family of G protein-coupled proton-sensing receptors: OGR1, GPR4 and TDAG8. These receptors are inactive at alkaline pH, reaching maximal activation at acidic pH. Genome-wide association studies have identified a locus within the TDAG8 gene associated with several autoimmune diseases, including MS. Accordingly, we here found that expression of TDAG8, as opposed to GPR4 or OGR1, is upregulated in MS plaques. This led us to investigate the expression of TDAG8 in oligodendrocytes using mouse and human in vitro and in vivo models. We observed significant upregulation of TDAG8 in human MO3.13 oligodendrocytes during maturation and in response to acidic conditions. However, its deficiency did not impact normal myelination in the mouse CNS, and its expression remained unaltered under demyelinating conditions in mouse organotypic cerebellar slices. Notably, our data revealed no expression of TDAG8 in primary mouse oligodendrocyte progenitor cells (OPCs), in contrast to its expression in primary human OPCs. Our investigations have revealed substantial species differences in the expression of proton-sensing receptors in oligodendrocytes, highlighting the limitations of the employed experimental models in fully elucidating the role of TDAG8 in myelination and oligodendrocyte biology. Consequently, the study does not furnish robust evidence for the role of TDAG8 in such processes. Nonetheless, our findings tentatively point towards a potential association between TDAG8 and myelination processes in humans, hinting at a potential link between TDAG8 and the pathophysiology of MS and warrants further research.
Collapse
Affiliation(s)
- Fionä Caratis
- Brain Diseases Centre, Medical University of Gdansk, Gdansk, Poland
- Department of Anatomy and Neurobiology, Medical University of Gdansk, Gdansk, Poland
| | - Mikołaj Opiełka
- Brain Diseases Centre, Medical University of Gdansk, Gdansk, Poland
| | - Martin Hausmann
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Maria Velasco-Estevez
- H12O-CNIO Hematological Malignancies Group, Clinical Research Unit, Centro Nacional de Investigaciones Oncologicas (CNIO), Madrid, Spain
| | - Bartłomiej Rojek
- Department of Adult Neurology, Medical University of Gdansk & University Clinical Centre, Gdansk, Poland
| | - Cheryl de Vallière
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Klaus Seuwen
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Gerhard Rogler
- Department of Gastroenterology and Hepatology, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Bartosz Karaszewski
- Brain Diseases Centre, Medical University of Gdansk, Gdansk, Poland
- Department of Adult Neurology, Medical University of Gdansk & University Clinical Centre, Gdansk, Poland
| | - Aleksandra Rutkowska
- Brain Diseases Centre, Medical University of Gdansk, Gdansk, Poland
- Department of Anatomy and Neurobiology, Medical University of Gdansk, Gdansk, Poland
| |
Collapse
|
2
|
Zeng R, Fang M, Shen A, Chai X, Zhao Y, Liu M, Zhu L, Rui W, Feng B, Hong L, Ding C, Song Z, Lu W, Zhang A. Discovery of a Highly Potent Oxysterol Receptor GPR183 Antagonist Bearing the Benzo[ d]thiazole Structural Motif for the Treatment of Inflammatory Bowel Disease (IBD). J Med Chem 2024; 67:3520-3541. [PMID: 38417036 DOI: 10.1021/acs.jmedchem.3c01905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
Accumulating evidence has demonstrated a critical pathological role of oxysterol receptor GPR183 in various inflammatory and autoimmune diseases, including inflammatory bowel disease (IBD). However, the currently reported GPR183 antagonists are very limited and not qualified for in vivo studies due to their inferior druglike properties. Herein, we conducted a structural elaboration focusing on improving its PK and safety profile based on a reference antagonist NIBR189. Of note, compound 33, bearing an aminobenzothiazole motif, exhibited reduced hERG inhibition, improved PK properties, and robust antagonistic activity (IC50 = 0.82 nM) with high selectivity against GPR183. Moreover, compound 33 displayed strong in vitro antimigration and anti-inflammatory activity in monocytes. Oral administration of compound 33 effectively improved the pathological symptoms of DSS-induced experimental colitis. All of these findings demonstrate that compound 33 is a novel and promising GPR183 antagonist suitable for further investigation to treat IBD.
Collapse
Affiliation(s)
- Ruoqing Zeng
- Shanghai Frontiers Science Center for Drug Target Identification and Delivery, School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- National Key Laboratory of Innovative Immunotherapy, Shanghai 200240, China
| | - Meimiao Fang
- Shanghai Key Laboratory of Regulatory Biology and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Ancheng Shen
- Shanghai Frontiers Science Center for Drug Target Identification and Delivery, School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- Lingang Laboratory, Shanghai 200210, China
- National Key Laboratory of Innovative Immunotherapy, Shanghai 200240, China
| | - Xiaolei Chai
- Shanghai Key Laboratory of Regulatory Biology and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Yumiao Zhao
- Shanghai Key Laboratory of Regulatory Biology and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Mingyao Liu
- Shanghai Key Laboratory of Regulatory Biology and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Lingfeng Zhu
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Weiwei Rui
- Department of General Surgery and Department of Pathology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - Bo Feng
- Department of General Surgery and Department of Pathology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200025, China
| | - Liang Hong
- Shanghai Frontiers Science Center for Drug Target Identification and Delivery, School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- National Key Laboratory of Innovative Immunotherapy, Shanghai 200240, China
| | - Chunyong Ding
- Shanghai Frontiers Science Center for Drug Target Identification and Delivery, School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- National Key Laboratory of Innovative Immunotherapy, Shanghai 200240, China
| | - Zilan Song
- Shanghai Frontiers Science Center for Drug Target Identification and Delivery, School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- National Key Laboratory of Innovative Immunotherapy, Shanghai 200240, China
| | - Weiqiang Lu
- Shanghai Key Laboratory of Regulatory Biology and School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Ao Zhang
- Shanghai Frontiers Science Center for Drug Target Identification and Delivery, School of Pharmaceutical Sciences, Shanghai Jiao Tong University, Shanghai 200240, China
- Lingang Laboratory, Shanghai 200210, China
- National Key Laboratory of Innovative Immunotherapy, Shanghai 200240, China
- Chemical Biology Research Center at School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| |
Collapse
|
3
|
Zhang F, Zhang B, Ding H, Li X, Wang X, Zhang X, Liu Q, Feng Q, Han M, Chen L, Qi L, Yang D, Li X, Zhu X, Zhao Q, Qiu J, Zhu Z, Tang H, Shen N, Wang H, Wei B. The Oxysterol Receptor EBI2 Links Innate and Adaptive Immunity to Limit IFN Response and Systemic Lupus Erythematosus. Adv Sci (Weinh) 2023; 10:e2207108. [PMID: 37469011 PMCID: PMC10520634 DOI: 10.1002/advs.202207108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 05/19/2023] [Indexed: 07/21/2023]
Abstract
Systemic lupus erythematosus (SLE) is a complex autoimmune disease with abnormal activation of the immune system. Recent attention is increasing about how aberrant lipid and cholesterol metabolism is linked together with type I interferon (IFN-I) signaling in the regulation of the pathogenesis of SLE. Here, a metabonomic analysis is performed and increased plasma concentrations of oxysterols, especially 7α, 25-dihydroxycholesterol (7α, 25-OHC), are identified in SLE patients. The authors find that 7α, 25-OHC binding to its receptor Epstein-Barr virus-induced gene 2 (EBI2) in macrophages can suppress STAT activation and the production of IFN-β, chemokines, and cytokines. Importantly, monocytes/macrophages from SLE patients and mice show significantly reduced EBI2 expression, which can be triggered by IFN-γ produced in activated T cells. Previous findings suggest that EBI2 enhances immune cell migration. Opposite to this effect, the authors demonstrate that EBI2-deficient macrophages produce higher levels of chemokines and cytokines, which recruits and activates myeloid cells,T and B lymphocytes to exacerbate tetramethylpentadecane-induced SLE. Together, via sensing the oxysterol 7α, 25-OHC, EBI2 in macrophages can modulate innate and adaptive immune responses, which may be used as a potential diagnostic marker and therapeutic target for SLE.
Collapse
Affiliation(s)
- Fang Zhang
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
- Cancer CenterShanghai Tenth People's HospitalSchool of MedicineTongji UniversityShanghai200072China
| | - Baokai Zhang
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Huihua Ding
- Shanghai Institute of RheumatologyRenji HospitalShanghai Jiao Tong University School of Medicine (SJTUSM)Shanghai200127China
| | - Xiangyue Li
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Xilin Wang
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Xiaomin Zhang
- State Key Laboratory of VirologyWuhan Institute of VirologyChinese Academy of SciencesUniversity of Chinese Academy of ScienceWuhan430071China
| | - Qiaojie Liu
- State Key Laboratory of VirologyWuhan Institute of VirologyChinese Academy of SciencesUniversity of Chinese Academy of ScienceWuhan430071China
| | - Qiuyun Feng
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Mingshun Han
- State Key Laboratory of Cell BiologyShanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai200031China
| | - Longlong Chen
- State Key Laboratory of Genetic EngineeringSchool of Life SciencesHuman Phenome InstituteZhangjiang Fudan International Innovation CenterZhongshan HospitalFudan UniversityShanghai200032China
- Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular PhenomicsFudan UniversityShanghai200032China
| | - Linlin Qi
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Dan Yang
- State Key Laboratory of VirologyWuhan Institute of VirologyChinese Academy of SciencesUniversity of Chinese Academy of ScienceWuhan430071China
| | - Xiaojing Li
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Xingguo Zhu
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Qi Zhao
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
| | - Jiaqian Qiu
- Interdisciplinary Research Center on Biology and ChemistryShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032China
| | - Zhengjiang Zhu
- Interdisciplinary Research Center on Biology and ChemistryShanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai200032China
| | - Huiru Tang
- State Key Laboratory of Genetic EngineeringSchool of Life SciencesHuman Phenome InstituteZhangjiang Fudan International Innovation CenterZhongshan HospitalFudan UniversityShanghai200032China
- Metabonomics and Systems Biology Laboratory at Shanghai International Centre for Molecular PhenomicsFudan UniversityShanghai200032China
| | - Nan Shen
- Shanghai Institute of RheumatologyRenji HospitalShanghai Jiao Tong University School of Medicine (SJTUSM)Shanghai200127China
| | - Hongyan Wang
- State Key Laboratory of Cell BiologyShanghai Institute of Biochemistry and Cell BiologyCenter for Excellence in Molecular Cell ScienceChinese Academy of SciencesUniversity of Chinese Academy of SciencesShanghai200031China
- School of Life ScienceHangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou310024China
| | - Bin Wei
- Institute of GeriatricsAffiliated Nantong Hospital of Shanghai University (The Sixth People's Hospital of Nantong)School of MedicineShanghai UniversityNantong226011China
- Immune Cells and Human Diseases Lab, Shanghai Engineering Research Center of Organ RepairSchool of Life SciencesShanghai UniversityShanghai200444China
- Cancer CenterShanghai Tenth People's HospitalSchool of MedicineTongji UniversityShanghai200072China
- State Key Laboratory of VirologyWuhan Institute of VirologyChinese Academy of SciencesUniversity of Chinese Academy of ScienceWuhan430071China
- Department of Laboratory MedicineGene Diagnosis Research CenterFujian Key Laboratory of Laboratory MedicineThe First Affiliated HospitalFujian Medical UniversityFuzhou350000China
| |
Collapse
|
4
|
Sharma K, Dev KK. The Effects of Antipsychotics in Experimental Models of Krabbe Disease. Biomedicines 2023; 11:biomedicines11051313. [PMID: 37238985 DOI: 10.3390/biomedicines11051313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2023] [Revised: 04/13/2023] [Accepted: 04/21/2023] [Indexed: 05/28/2023] Open
Abstract
The role of altered myelin in the onset and development of schizophrenia and changes in myelin due to antipsychotics remains unclear. Antipsychotics are D2 receptor antagonists, yet D2 receptor agonists increase oligodendrocyte progenitor numbers and limit oligodendrocyte injury. Conflicting studies suggest these drugs promote the differentiation of neural progenitors to oligodendrocyte lineage, while others report antipsychotics inhibit the proliferation and differentiation of oligodendrocyte precursors. Here, we utilised in-vitro (human astrocytes), ex-vivo (organotypic slice cultures) and in-vivo (twitcher mouse model) experimental study designs of psychosine-induced demyelination, a toxin that accumulates in Krabbe disease (KD), to investigate direct effects of antipsychotics on glial cell dysfunction and demyelination. Typical and atypical antipsychotics, and selective D2 and 5HT2A receptor antagonists, attenuated psychosine-induced cell viability, toxicity, and morphological aberrations in human astrocyte cultures. Haloperidol and clozapine reduced psychosine-induced demyelination in mouse organotypic cerebellar slices. These drugs also attenuated the effects of psychosine on astrocytes and microglia and restored non-phosphorylated neurofilament levels, indicating neuroprotective effects. In the demyelinating twitcher mouse model of KD, haloperidol improved mobility and significantly increased the survival of these animals. Overall, this study suggests that antipsychotics directly regulate glial cell dysfunction and exert a protective effect on myelin loss. This work also points toward the potential use of these pharmacological agents in KD.
Collapse
Affiliation(s)
- Kapil Sharma
- Drug Development Research Group, Department of Physiology, School of Medicine, Trinity College Dublin, D02 R590 Dublin, Ireland
| | - Kumlesh K Dev
- Drug Development Research Group, Department of Physiology, School of Medicine, Trinity College Dublin, D02 R590 Dublin, Ireland
| |
Collapse
|
5
|
Kjær VMS, Daugvilaite V, Stepniewski TM, Madsen CM, Jørgensen AS, Bhuskute KR, Inoue A, Ulven T, Benned-Jensen T, Hjorth SA, Hjortø GM, Moo EV, Selent J, Rosenkilde MM. Migration mediated by the oxysterol receptor GPR183 depends on arrestin coupling but not receptor internalization. Sci Signal 2023; 16:eabl4283. [PMID: 37014928 DOI: 10.1126/scisignal.abl4283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2023]
Abstract
The chemotactic G protein-coupled receptor GPR183 and its most potent endogenous oxysterol ligand 7α,25-dihydroxycholesterol (7α,25-OHC) are important for immune cell positioning in secondary lymphoid tissues. This receptor-ligand pair is associated with various diseases, in some cases contributing favorably and in other cases adversely, making GPR183 an attractive target for therapeutic intervention. We investigated the mechanisms underlying GPR183 internalization and the role of internalization in the main biological function of the receptor, chemotaxis. We found that the C terminus of the receptor was important for ligand-induced internalization but less so for constitutive (ligand-independent) internalization. β-arrestin potentiated ligand-induced internalization but was not required for ligand-induced or constitutive internalization. Caveolin and dynamin were the main mediators of both constitutive and ligand-induced receptor internalization in a mechanism independent of G protein activation. Clathrin-mediated endocytosis also contributed to constitutive GPR183 internalization in a β-arrestin-independent manner, suggesting the existence of different pools of surface-localized GPR183. Chemotaxis mediated by GPR183 depended on receptor desensitization by β-arrestins but could be uncoupled from internalization, highlighting an important biological role for the recruitment of β-arrestin to GPR183. The role of distinct pathways in internalization and chemotaxis may aid in the development of GPR183-targeting drugs for specific disease contexts.
Collapse
Affiliation(s)
- Viktoria M S Kjær
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Viktorija Daugvilaite
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Tomasz M Stepniewski
- Research Programme on Biomedical Informatics (GRIB), Hospital del Mar Medical Research Institute (IMIM)-Pompeu Fabra University (UPF), Barcelona 08003, Spain
- InterAx Biotech AG, Villigen 5234, Switzerland
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Warsaw 02-089, Poland
| | - Christian M Madsen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Astrid S Jørgensen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Kaustubh R Bhuskute
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Asuka Inoue
- Graduate School of Pharmaceutical Sciences, Tohoku University, Sendai 980-8578, Japan
| | - Trond Ulven
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Tau Benned-Jensen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Siv A Hjorth
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
- Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Gertrud M Hjortø
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Ee Von Moo
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jana Selent
- Research Programme on Biomedical Informatics (GRIB), Hospital del Mar Medical Research Institute (IMIM)-Pompeu Fabra University (UPF), Barcelona 08003, Spain
| | - Mette M Rosenkilde
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| |
Collapse
|
6
|
Sedighi S, Gholizadeh O, Yasamineh S, Akbarzadeh S, Amini P, Favakehi P, Afkhami H, Firouzi-Amandi A, Pahlevan D, Eslami M, Yousefi B, Poortahmasebi V, Dadashpour M. Comprehensive Investigations Relationship Between Viral Infections and Multiple Sclerosis Pathogenesis. Curr Microbiol 2023; 80:15. [PMID: 36459252 PMCID: PMC9716500 DOI: 10.1007/s00284-022-03112-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Accepted: 11/05/2022] [Indexed: 12/04/2022]
Abstract
Multiple sclerosis (MS) is a chronic autoimmune disease that affects the central nervous system (CNS). Compared to other types of self-limiting myelin disorders, MS compartmentalizes and maintains chronic inflammation in the CNS. Even though the exact cause of MS is unclear, it is assumed that genetic and environmental factors play an important role in susceptibility to this disease. The progression of MS is triggered by certain environmental factors, such as viral infections. The most important viruses that affect MS are Epstein-Barr virus (EBV), human herpes virus 6 (HHV-6), human endogenous retrovirus (HERV), cytomegalovirus (CMV), and varicella zoster virus (VZV). These viruses all have latent stages that allow them to escape immune detection and reactivate after exposure to various stimuli. Furthermore, their tropism for CNS and immune system cells explains their possible deleterious function in neuroinflammation. In this study, the effect of viral infections on MS disease focuses on the details of viruses that can change the risk of the disease. Paying attention to the most recent articles on the role of SARS-CoV-2 in MS disease, laboratory indicators show the interaction of the immune system with the virus. Also, strategies to prevent viruses that play a role in triggering MS are discussed, such as EBV, which is one of the most important.
Collapse
Affiliation(s)
- Somayeh Sedighi
- Department of Immunology, Faculty of Medicine, Medical Science of Mashhad, Mashhad, Iran
| | - Omid Gholizadeh
- Department of Bacteriology and Virology, Faculty of Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran
| | - Saman Yasamineh
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran
| | - Sama Akbarzadeh
- Department of Animal Biology, Faculty of Natural Science, University of Tabriz, Tabriz, Iran
| | - Parya Amini
- Research Center for Clinical Virology, Tehran University of Medical Sciences, Tehran, Iran
| | - Parnia Favakehi
- Department of Microbiology, Falavargan Branch, Islamic Azad University, Isfahan, Iran
| | - Hamed Afkhami
- Department of Bacteriology, Faculty of Medicine, Medical Science of Shahed, Tehran, Iran
| | - Akram Firouzi-Amandi
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Daryoush Pahlevan
- Determinants of Health Research Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Majid Eslami
- Department of Bacteriology and Virology, Semnan University of Medical Sciences, Semnan, Iran
| | - Bahman Yousefi
- Cancer Research Center, Semnan University of Medical Sciences, Semnan, Iran
| | - Vahdat Poortahmasebi
- Department of Bacteriology and Virology, Faculty of Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mehdi Dadashpour
- Cancer Research Center, Semnan University of Medical Sciences, Semnan, Iran.
- Department of Medical Biotechnology, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
| |
Collapse
|
7
|
Braden K, Campolo M, Li Y, Chen Z, Doyle TM, Giancotti LA, Esposito E, Zhang J, Cuzzocrea S, Arnatt CK, Salvemini D. Activation of GPR183 by 7 α,25-Dihydroxycholesterol Induces Behavioral Hypersensitivity through Mitogen-Activated Protein Kinase and Nuclear Factor- κB. J Pharmacol Exp Ther 2022; 383:172-181. [PMID: 36116795 PMCID: PMC9553113 DOI: 10.1124/jpet.122.001283] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 08/17/2022] [Indexed: 01/07/2023] Open
Abstract
Emerging evidence implicates the G-protein coupled receptor (GPCR) GPR183 in the development of neuropathic pain. Further investigation of the signaling pathways downstream of GPR183 is needed to support the development of GPR183 antagonists as analgesics. In rodents, intrathecal injection of its ligand, 7α,25-dihydroxycholesterol (7α,25-OHC), causes time-dependent development of mechano-and cold- allodynia (behavioral hypersensitivity). These effects are blocked by the selective small molecule GPR183 antagonist, SAE-14. However, the molecular mechanisms engaged downstream of GPR183 in the spinal cord are not known. Here, we show that 7α,25-OHC-induced behavioral hypersensitivity is Gα i dependent, but not β-arrestin 2-dependent. Non-biased transcriptomic analyses of dorsal-horn spinal cord (DH-SC) tissues harvested at the time of peak hypersensitivity implicate potential contributions of mitogen-activated protein kinase (MAPK) and nuclear factor κB (NF-κB). In support, we found that the development of 7α,25-OHC/GPR183-induced mechano-allodynia was associated with significant activation of MAPKs (extracellular signal-regulated kinase [ERK], p38) and redox-sensitive transcription factors (NF-κB) and increased formation of inflammatory and neuroexcitatory cytokines. SAE-14 blocked these effects and behavioral hypersensitivity. Our findings provide novel mechanistic insight into how GPR183 signaling in the spinal cord produces hypersensitivity through MAPK and NF-κB activation. SIGNIFICANCE STATEMENT: Using a multi-disciplinary approach, we have characterized the molecular mechanisms underpinning 7α,25-OHC/GPR183-induced hypersensitivity in mice. Intrathecal injections of the GPR183 agonist 7α,25-OHC induce behavioral hypersensitivity, and these effects are blocked by the selective GPR183 antagonist SAE-14. We found that 7α,25-OHC-induced allodynia is dependent on MAPK and NF-κB signaling pathways and results in an increase in pro-inflammatory cytokine expression. This study provides a first insight into how GPR183 signaling in the spinal cord is pronociceptive.
Collapse
Affiliation(s)
- Kathryn Braden
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Michela Campolo
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Ying Li
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Zhoumou Chen
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Timothy M Doyle
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Luigino Antonio Giancotti
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Emanuela Esposito
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Jinsong Zhang
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Salvatore Cuzzocrea
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Christopher Kent Arnatt
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| | - Daniela Salvemini
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A., D.S.); Henry and Amelia Nasrallah Center for Neuroscience, Saint Louis University, Saint Louis, Missouri (K.B., Y.L., Z.C., T.M.D., L.A.G., J.Z., C.K.A.,D.S.); Department of Clinical and Experimental Medicine and Pharmacology, University of Messina, Messina, Italy (M.C., E.E., S.C.); and Department of Chemistry, Saint Louis University, Saint Louis, Missouri (C.K.A.)
| |
Collapse
|
8
|
Alonso-Alonso ML, Sampedro-Viana A, Fernández-Rodicio S, Bazarra-Barreiros M, Ouro A, Sobrino T, Campos F, Castillo J, Hervella P, Iglesias-Rey R. Need for a Paradigm Shift in the Treatment of Ischemic Stroke: The Blood-Brain Barrier. Int J Mol Sci 2022; 23:9486. [PMID: 36012745 DOI: 10.3390/ijms23169486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/04/2022] [Accepted: 08/18/2022] [Indexed: 11/17/2022] Open
Abstract
Blood-brain barrier (BBB) integrity is essential to maintaining brain health. Aging-related alterations could lead to chronic progressive leakiness of the BBB, which is directly correlated with cerebrovascular diseases. Indeed, the BBB breakdown during acute ischemic stroke is critical. It remains unclear, however, whether BBB dysfunction is one of the first events that leads to brain disease or a down-stream consequence. This review will focus on the BBB dysfunction associated with cerebrovascular disease. An added difficulty is its association with the deleterious or reparative effect, which depends on the stroke phase. We will first outline the BBB structure and function. Then, we will focus on the spatiotemporal chronic, slow, and progressive BBB alteration related to ischemic stroke. Finally, we will propose a new perspective on preventive therapeutic strategies associated with brain aging based on targeting specific components of the BBB. Understanding BBB age-evolutions will be beneficial for new drug development and the identification of the best performance window times. This could have a direct impact on clinical translation and personalised medicine.
Collapse
|
9
|
Kim JS, Lim H, Seo JY, Kang KR, Yu SK, Kim CS, Kim DK, Kim HJ, Seo YS, Lee GJ, You JS, Oh JS. GPR183 Regulates 7α,25-Dihydroxycholesterol-Induced Oxiapoptophagy in L929 Mouse Fibroblast Cell. Molecules 2022; 27:4798. [PMID: 35956750 PMCID: PMC9369580 DOI: 10.3390/molecules27154798] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 11/16/2022] Open
Abstract
7α,25-dihydroxycholesterol (7α,25-DHC) is an oxysterol synthesized from 25-hydroxycholesterol by cytochrome P450 family 7 subfamily B member 1 (CYP7B1) and is a monooxygenase (oxysterol-7α-hydroxylase) expressed under inflammatory conditions in various cell types. In this study, we verified that 7α,25-DHC-induced oxiapoptophagy is mediated by apoptosis, oxidative stress, and autophagy in L929 mouse fibroblasts. MTT assays and live/dead cell staining revealed that cytotoxicity was increased by 7α,25-DHC in L929 cells. Consequentially, cells with condensed chromatin and altered morphology were enhanced in L929 cells incubated with 7α,25-DHC for 48 h. Furthermore, apoptotic population was increased by 7α,25-DHC exposure through the cascade activation of caspase-9, caspase-3, and poly (ADP-ribose) polymerase in the intrinsic pathway of apoptosis in these cells. 7α,25-DHC upregulated reactive oxygen species (ROS) in L929 cells. Expression of autophagy biomarkers, including beclin-1 and LC3, was significantly increased by 7α,25-DHC treatment in L929 cells. 7α,25-DHC inhibits the phosphorylation of Akt associated with autophagy and increases p53 expression in L929 cells. In addition, inhibition of G-protein-coupled receptor 183 (GPR183), a receptor of 7α,25-DHC, using GPR183 specific antagonist NIBR189 suppressed 7α,25-DHC-induced apoptosis, ROS production, and autophagy in L929 cells. Collectively, GPR183 regulates 7α,25-DHC-induced oxiapoptophagy in L929 cells.
Collapse
Affiliation(s)
- Jae-Sung Kim
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - HyangI Lim
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Jeong-Yeon Seo
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Kyeong-Rok Kang
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Sun-Kyoung Yu
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Chun Sung Kim
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Do Kyung Kim
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Heung-Joong Kim
- Institute of Dental Science, School of Dentistry, Chosun University, Gwangju 61452, Korea; (J.-S.K.); (H.L.); (J.-Y.S.); (K.-R.K.); (S.-K.Y.); (C.S.K.); (D.K.K.); (H.-J.K.)
| | - Yo-Seob Seo
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Chosun University, Gwangju 61452, Korea;
| | - Gyeong-Je Lee
- Department of Prosthodontics, School of Dentistry, Chosun University, Gwangju 61452, Korea;
| | - Jae-Seek You
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju 61452, Korea;
| | - Ji-Su Oh
- Department of Oral and Maxillofacial Surgery, School of Dentistry, Chosun University, Gwangju 61452, Korea;
| |
Collapse
|
10
|
Abstract
Cholesterol is an essential component of plasma membrane and precursor of biological active compounds, including hydroxycholesterols (HCs). HCs regulate cellular homeostasis of cholesterol; they can pass across the membrane and vascular barriers and act distantly as para- and endocrine agents. A small amount of 25-hydroxycholesterol (25-HC) is produced in the endoplasmic reticulum of most cells, where it serves as a potent regulator of the synthesis, intracellular transport, and storage of cholesterol. Production of 25-HC is strongly increased in the macrophages, dendrite cells, and microglia at the inflammatory response. The synthesis of 25-HC can be also upregulated in some neurological disorders, such as Alzheimer’s disease, amyotrophic lateral sclerosis, spastic paraplegia type 5, and X-linked adrenoleukodystrophy. However, it is unclear whether 25-HC aggravates these pathologies or has the protective properties. The molecular targets for 25-HC are transcriptional factors (LX receptors, SREBP2, ROR), G protein-coupled receptor (GPR183), ion channels (NMDA receptors, SLO1), adhesive molecules (α5β1 and ανβ3 integrins), and oxysterol-binding proteins. The diversity of 25-HC-binding proteins points to the ability of HC to affect many physiological and pathological processes. In this review, we focused on the regulation of 25-HC production and its universal role in the control of cellular cholesterol homeostasis, as well as the effects of 25-HC as a signaling molecule mediating the influence of inflammation on the processes in the neuromuscular system and brain. Based on the evidence collected, it can be suggested that 25-HC prevents accumulation of cellular cholesterol and serves as a potent modulator of neuroinflammation, synaptic transmission, and myelinization. An increased production of 25-HC in response to a various type of damage can have a protective role and reduce neuronal loss. At the same time, an excess of 25-HC may exert the neurotoxic effects.
Collapse
Affiliation(s)
- Ulia G Odnoshivkina
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Federal Research Center "Kazan Scientific Center of Russian Academy of Sciences", Kazan, 420111, Russia
- Kazan State Medical University, Kazan, 420012, Russia
| | - Eva A Kuznetsova
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Federal Research Center "Kazan Scientific Center of Russian Academy of Sciences", Kazan, 420111, Russia
| | - Alexey M Petrov
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Federal Research Center "Kazan Scientific Center of Russian Academy of Sciences", Kazan, 420111, Russia.
- Kazan State Medical University, Kazan, 420012, Russia
| |
Collapse
|
11
|
Barington L, Christensen LVV, Pedersen KK, Niss Arfelt K, Roumain M, Jensen KHR, Kjær VMS, Daugvilaite V, Kearney JF, Christensen JP, Hjortø GM, Muccioli GG, Holst PJ, Rosenkilde MM. GPR183 Is Dispensable for B1 Cell Accumulation and Function, but Affects B2 Cell Abundance, in the Omentum and Peritoneal Cavity. Cells 2022; 11:cells11030494. [PMID: 35159303 PMCID: PMC8834096 DOI: 10.3390/cells11030494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/25/2022] [Accepted: 01/27/2022] [Indexed: 02/06/2023] Open
Abstract
B1 cells constitute a specialized subset of B cells, best characterized in mice, which is abundant in body cavities, including the peritoneal cavity. Through natural and antigen-induced antibody production, B1 cells participate in the early defense against bacteria. The G protein-coupled receptor 183 (GPR183), also known as Epstein-Barr virus-induced gene 2 (EBI2), is an oxysterol-activated chemotactic receptor that regulates migration of B cells. We investigated the role of GPR183 in B1 cells in the peritoneal cavity and omentum. B1 cells expressed GPR183 at the mRNA level and migrated towards the GPR183 ligand 7α,25-dihydroxycholesterol (7α,25-OHC). GPR183 knock-out (KO) mice had smaller omenta, but with normal numbers of B1 cells, whereas they had fewer B2 cells in the omentum and peritoneal cavity than wildtype (WT) mice. GPR183 was not responsible for B1 cell accumulation in the omentum in response to i.p. lipopolysaccharide (LPS)-injection, in spite of a massive increase in 7α,25-OHC levels. Lack of GPR183 also did not affect B1a- or B1b cell-specific antibody responses after vaccination. In conclusion, we found that GPR183 is non-essential for the accumulation and function of B1 cells in the omentum and peritoneal cavity, but that it influences the abundance of B2 cells in these compartments.
Collapse
Affiliation(s)
- Line Barington
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Liv von Voss Christensen
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Kristian Kåber Pedersen
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Kristine Niss Arfelt
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Martin Roumain
- Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Louvain Drug Research Institute, Université catholique de Louvain, 1200 Brussels, Belgium; (M.R.); (G.G.M.)
| | - Kristian Høj Reveles Jensen
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Viktoria Madeline Skovgaard Kjær
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Viktorija Daugvilaite
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - John F. Kearney
- Division of Developmental and Clinical Immunology, Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA;
| | - Jan Pravsgaard Christensen
- Infectious Immunology Group, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark;
| | - Gertrud Malene Hjortø
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
| | - Giulio G. Muccioli
- Bioanalysis and Pharmacology of Bioactive Lipids Research Group, Louvain Drug Research Institute, Université catholique de Louvain, 1200 Brussels, Belgium; (M.R.); (G.G.M.)
| | - Peter Johannes Holst
- Experimental Vaccinology Group, Centre for Medical Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark;
- InProTher ApS, 2200 Copenhagen, Denmark
| | - Mette Marie Rosenkilde
- Laboratory for Molecular Pharmacology, Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark; (L.B.); (L.v.V.C.); (K.K.P.); (K.N.A.); (K.H.R.J.); (V.M.S.K.); (V.D.); (G.M.H.)
- Correspondence:
| |
Collapse
|
12
|
Staurenghi E, Giannelli S, Testa G, Sottero B, Leonarduzzi G, Gamba P. Cholesterol Dysmetabolism in Alzheimer's Disease: A Starring Role for Astrocytes? Antioxidants (Basel) 2021; 10:antiox10121890. [PMID: 34943002 PMCID: PMC8750262 DOI: 10.3390/antiox10121890] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 01/19/2023] Open
Abstract
In recent decades, the impairment of cholesterol metabolism in the pathogenesis of Alzheimer’s disease (AD) has been intensively investigated, and it has been recognized to affect amyloid β (Aβ) production and clearance, tau phosphorylation, neuroinflammation and degeneration. In particular, the key role of cholesterol oxidation products, named oxysterols, has emerged. Brain cholesterol metabolism is independent from that of peripheral tissues and it must be preserved in order to guarantee cerebral functions. Among the cells that help maintain brain cholesterol homeostasis, astrocytes play a starring role since they deliver de novo synthesized cholesterol to neurons. In addition, other physiological roles of astrocytes are to modulate synaptic transmission and plasticity and support neurons providing energy. In the AD brain, astrocytes undergo significant morphological and functional changes that contribute to AD onset and development. However, the extent of this contribution and the role played by oxysterols are still unclear. Here we review the current understanding of the physiological role exerted by astrocytes in the brain and their contribution to AD pathogenesis. In particular, we focus on the impact of cholesterol dysmetabolism on astrocyte functions suggesting new potential approaches to develop therapeutic strategies aimed at counteracting AD development.
Collapse
|
13
|
Schroeter CB, Huntemann N, Bock S, Nelke C, Kremer D, Pfeffer K, Meuth SG, Ruck T. Crosstalk of Microorganisms and Immune Responses in Autoimmune Neuroinflammation: A Focus on Regulatory T Cells. Front Immunol 2021; 12:747143. [PMID: 34691057 PMCID: PMC8529161 DOI: 10.3389/fimmu.2021.747143] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/20/2021] [Indexed: 12/22/2022] Open
Abstract
Regulatory T cells (Tregs) are the major determinant of peripheral immune tolerance. Many Treg subsets have been described, however thymus-derived and peripherally induced Tregs remain the most important subpopulations. In multiple sclerosis, a prototypical autoimmune disorder of the central nervous system, Treg dysfunction is a pathogenic hallmark. In contrast, induction of Treg proliferation and enhancement of their function are central immune evasion mechanisms of infectious pathogens. In accordance, Treg expansion is compartmentalized to tissues with high viral replication and prolonged in chronic infections. In friend retrovirus infection, Treg expansion is mainly based on excessive interleukin-2 production by infected effector T cells. Moreover, pathogens seem also to enhance Treg functions as shown in human immunodeficiency virus infection, where Tregs express higher levels of effector molecules such as cytotoxic T-lymphocyte-associated protein 4, CD39 and cAMP and show increased suppressive capacity. Thus, insights into the molecular mechanisms by which intracellular pathogens alter Treg functions might aid to find new therapeutic approaches to target central nervous system autoimmunity. In this review, we summarize the current knowledge of the role of pathogens for Treg function in the context of autoimmune neuroinflammation. We discuss the mechanistic implications for future therapies and provide an outlook for new research directions.
Collapse
Affiliation(s)
- Christina B Schroeter
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Niklas Huntemann
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Stefanie Bock
- Department of Neurology With Institute of Translational Neurology, University of Münster, Münster, Germany
| | - Christopher Nelke
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - David Kremer
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Klaus Pfeffer
- Institute of Medical Microbiology and Hospital Hygiene, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
| | - Sven G Meuth
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Tobias Ruck
- Department of Neurology, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| |
Collapse
|
14
|
Jurga AM, Paleczna M, Kadluczka J, Kuter KZ. Beyond the GFAP-Astrocyte Protein Markers in the Brain. Biomolecules 2021; 11:biom11091361. [PMID: 34572572 PMCID: PMC8468264 DOI: 10.3390/biom11091361] [Citation(s) in RCA: 80] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 12/13/2022] Open
Abstract
The idea of central nervous system as one-man band favoring neurons is long gone. Now we all are aware that neurons and neuroglia are team players and constant communication between those various cell types is essential to maintain functional efficiency and a quick response to danger. Here, we summarize and discuss known and new markers of astroglial multiple functions, their natural heterogeneity, cellular interactions, aging and disease-induced dysfunctions. This review is focused on newly reported facts regarding astrocytes, which are beyond the old stereotypes. We present an up-to-date list of marker proteins used to identify a broad spectrum of astroglial phenotypes related to the various physiological and pathological nervous system conditions. The aim of this review is to help choose markers that are well-tailored for specific needs of further experimental studies, precisely recognizing differential glial phenotypes, or for diagnostic purposes. We hope it will help to categorize the functional and structural diversity of the astroglial population and ease a clear readout of future experimental results.
Collapse
|
15
|
Klejbor I, Shimshek DR, Klimaszewska-Łata J, Velasco-Estevez M, Moryś J, Karaszewski B, Szutowicz A, Rutkowska A. EBI2 is expressed in glial cells in multiple sclerosis lesions, and its knock-out modulates remyelination in the cuprizone model. Eur J Neurosci 2021; 54:5173-5188. [PMID: 34145920 DOI: 10.1111/ejn.15359] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 06/12/2021] [Indexed: 11/25/2022]
Abstract
EBI2 receptor regulates the immune system, and in multiple, sclerosis is upregulated in the central nervous system infiltrating lymphocytes. In newborn EBI2-deficient mice, myelin development is delayed, and its persistent antagonism inhibits remyelination in chemically demyelinated organotypic cerebellar slices. We used the cuprizone model of multiple sclerosis to elucidate the role of central nervous system-expressed EBI2 in de- and remyelination. The wild-type and EBI2 knock-out mice were fed 0.2% cuprizone in chow for 5 weeks and allowed to recover on a normal diet for 2 weeks. The data showed less efficient recovery of myelin, attenuated oligodendrocyte loss, fewer astrocytes and increased total cholesterol levels in the EBI2 knock-out mice after recovery. Moreover, the wild-type mice upregulated EBI2 expression after recovery confirming the involvement of EBI2 signalling during recovery from demyelination in the cuprizone model. The pro-inflammatory cytokine levels were at comparable levels in the wild-type and EBI2 knock-out mice, with only minor differences in TNFα and IL1β levels either at peak or during recovery. The neuroinflammatory signalling molecules, Abl1 kinase and NFКB1 (p105/p50) subunit, were significantly downregulated in the EBI2 knock-out mice at peak of disease. Immunohistochemical investigations of EBI2 receptor distribution in the central nervous system (CNS) cells in multiple sclerosis (MS) brain revealed strong expression of EBI2 in astrocytes and microglia inside the plaques implicating glia-expressed EBI2 in multiple sclerosis pathophysiology. Taken together, these findings demonstrate the involvement of EBI2 signalling in the recovery from demyelination rather than in demyelination and as such warrant further research into the role of EBI2 in remyelination.
Collapse
Affiliation(s)
- Ilona Klejbor
- Department of Anatomy and Physiology, Pomeranian University in Słupsk, Słupsk, Poland
| | - Derya R Shimshek
- Neuroscience, Novartis Institutes for BioMedical Research, Novartis Pharma AG, Basel, Switzerland
| | | | | | - Janusz Moryś
- Department of Anatomy and Neurobiology, Medical University of Gdańsk, Gdańsk, Poland
| | - Bartosz Karaszewski
- Division of Neurology, Department of Adult Neurology, Medical University of Gdańsk, Gdańsk, Poland
| | - Andrzej Szutowicz
- Department of Laboratory Medicine, Medical University of Gdańsk, Gdańsk, Poland
| | - Aleksandra Rutkowska
- Department of Laboratory Medicine, Medical University of Gdańsk, Gdańsk, Poland.,Department of Anatomy and Neurobiology, Medical University of Gdańsk, Gdańsk, Poland
| |
Collapse
|
16
|
Velasco-Estevez M, Koch N, Klejbor I, Laurent S, Dev KK, Szutowicz A, Sailer AW, Rutkowska A. EBI2 Is Temporarily Upregulated in MO3.13 Oligodendrocytes during Maturation and Regulates Remyelination in the Organotypic Cerebellar Slice Model. Int J Mol Sci 2021; 22:ijms22094342. [PMID: 33919387 PMCID: PMC8122433 DOI: 10.3390/ijms22094342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/12/2021] [Accepted: 04/20/2021] [Indexed: 12/11/2022] Open
Abstract
The EBI2 receptor regulates the immune system and is expressed in various immune cells including B and T lymphocytes. It is also expressed in astrocytes in the central nervous system (CNS) where it regulates pro-inflammatory cytokine release, cell migration and protects from chemically induced demyelination. Its signaling and expression are implicated in various diseases including multiple sclerosis, where its expression is increased in infiltrating immune cells in the white matter lesions. Here, for the first time, the EBI2 protein in the CNS cells in the human brain was examined. The function of the receptor in MO3.13 oligodendrocytes, as well as its role in remyelination in organotypic cerebellar slices, were investigated. Human brain sections were co-stained for EBI2 receptor and various markers of CNS-specific cells and the human oligodendrocyte cell line MO3.13 was used to investigate changes in EBI2 expression and cellular migration. Organotypic cerebellar slices prepared from wild-type and cholesterol 25-hydroxylase knock-out mice were used to study remyelination following lysophosphatidylcholine (LPC)-induced demyelination. The data showed that EBI2 receptor is present in OPCs but not in myelinating oligodendrocytes in the human brain and that EBI2 expression is temporarily upregulated in maturing MO3.13 oligodendrocytes. Moreover, we show that migration of MO3.13 cells is directly regulated by EBI2 and that its signaling is necessary for remyelination in cerebellar slices post-LPC-induced demyelination. The work reported here provides new information on the expression and role of EBI2 in oligodendrocytes and myelination and provides new tools for modulation of oligodendrocyte biology and therapeutic approaches for demyelinating diseases.
Collapse
Affiliation(s)
- Maria Velasco-Estevez
- Department of Laboratory Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland; (M.V.-E.); (N.K.); (A.S.)
| | - Nina Koch
- Department of Laboratory Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland; (M.V.-E.); (N.K.); (A.S.)
| | - Ilona Klejbor
- Department of Anatomy and Neurobiology, Medical University of Gdańsk, 80-210 Gdańsk, Poland;
| | - Stephane Laurent
- Chemical Biology and Therapeutics/Disease Area X/Liver, Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4056 Basel, Switzerland; (S.L.); (A.W.S.)
| | - Kumlesh K. Dev
- School of Medicine, Trinity College Dublin, Dublin 2, Ireland;
| | - Andrzej Szutowicz
- Department of Laboratory Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland; (M.V.-E.); (N.K.); (A.S.)
| | - Andreas W. Sailer
- Chemical Biology and Therapeutics/Disease Area X/Liver, Novartis Institutes for BioMedical Research, Novartis Pharma AG, CH-4056 Basel, Switzerland; (S.L.); (A.W.S.)
| | - Aleksandra Rutkowska
- Department of Laboratory Medicine, Medical University of Gdańsk, 80-210 Gdańsk, Poland; (M.V.-E.); (N.K.); (A.S.)
- Department of Anatomy and Neurobiology, Medical University of Gdańsk, 80-210 Gdańsk, Poland;
- Correspondence:
| |
Collapse
|
17
|
Ariza ME. Myalgic Encephalomyelitis/Chronic Fatigue Syndrome: The Human Herpesviruses Are Back! Biomolecules 2021; 11:185. [PMID: 33572802 DOI: 10.3390/biom11020185] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 01/04/2021] [Accepted: 01/23/2021] [Indexed: 12/20/2022] Open
Abstract
Myalgic Encephalomyelitis/Chronic Fatigue Syndrome (ME/CFS) or Systemic Exertion Intolerance Disease (SEID) is a chronic multisystem illness of unconfirmed etiology. There are currently no biomarkers and/or signatures available to assist in the diagnosis of the syndrome and while numerous mechanisms have been hypothesized to explain the pathology of ME/CFS, the triggers and/or drivers remain unknown. Initial studies suggested a potential role of the human herpesviruses especially Epstein-Barr virus (EBV) in the disease process but inconsistent and conflicting data led to the erroneous suggestion that these viruses had no role in the syndrome. New studies using more advanced approaches have now demonstrated that specific proteins encoded by EBV could contribute to the immune and neurological abnormalities exhibited by a subgroup of patients with ME/CFS. Elucidating the role of these herpesvirus proteins in ME/CFS may lead to the identification of specific biomarkers and the development of novel therapeutics.
Collapse
|
18
|
Staurenghi E, Cerrato V, Gamba P, Testa G, Giannelli S, Leoni V, Caccia C, Buffo A, Noble W, Perez-Nievas BG, Leonarduzzi G. Oxysterols present in Alzheimer's disease brain induce synaptotoxicity by activating astrocytes: A major role for lipocalin-2. Redox Biol 2020; 39:101837. [PMID: 33360775 PMCID: PMC7772793 DOI: 10.1016/j.redox.2020.101837] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Revised: 12/14/2020] [Accepted: 12/14/2020] [Indexed: 01/19/2023] Open
Abstract
Among Alzheimer's disease (AD) brain hallmarks, the presence of reactive astrocytes was demonstrated to correlate with neuronal loss and cognitive deficits. Evidence indeed supports the role of reactive astrocytes as mediators of changes in neurons, including synapses. However, the complexity and the outcomes of astrocyte reactivity are far from being completely elucidated. Another key role in AD pathogenesis is played by alterations in brain cholesterol metabolism. Oxysterols (cholesterol oxidation products) are crucial for brain cholesterol homeostasis, and we previously demonstrated that changes in the brain levels of various oxysterols correlate with AD progression. Moreover, oxysterols have been shown to contribute to various pathological mechanisms involved in AD pathogenesis. In order to deepen the role of oxysterols in AD, we investigated whether they could contribute to astrocyte reactivity, and consequently impact on neuronal health. Results showed that oxysterols present in mild or severe AD brains induce a clear morphological change in mouse primary astrocytes, accompanied by the upregulation of some reactive astrocyte markers, including lipocalin-2 (Lcn2). Moreover, astrocyte conditioned media analysis revealed a significant increase in the release of Lcn2, cytokines, and chemokines in response to oxysterols. A significant reduction of postsynaptic density protein 95 (PSD95) and a concurrent increase in cleaved caspase-3 protein levels have been demonstrated in neurons co-cultured with oxysterol-treated astrocytes, pointing out that mediators released by astrocytes have an impact on neurons. Among these mediators, Lcn2 has been demonstrated to play a major role on synapses, affecting neurite morphology and decreasing dendritic spine density. These data demonstrated that oxysterols present in the AD brain promote astrocyte reactivity, determining the release of several mediators that affect neuronal health and synapses. Lcn2 has been shown to exert a key role in mediating the synaptotoxic effect of oxysterol-treated astrocytes.
Collapse
Affiliation(s)
- Erica Staurenghi
- Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy.
| | - Valentina Cerrato
- Department of Neuroscience Rita Levi-Montalcini, University of Turin, Turin, Italy; Neuroscience Institute Cavalieri Ottolenghi, Orbassano, Turin, Italy
| | - Paola Gamba
- Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy
| | - Gabriella Testa
- Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy
| | - Serena Giannelli
- Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy
| | - Valerio Leoni
- Department of Medicine and Surgery, University of Milan-Bicocca, Desio, Monza-Brianza (MB), Italy
| | - Claudio Caccia
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan, Italy
| | - Annalisa Buffo
- Department of Neuroscience Rita Levi-Montalcini, University of Turin, Turin, Italy; Neuroscience Institute Cavalieri Ottolenghi, Orbassano, Turin, Italy
| | - Wendy Noble
- Institute of Psychiatry, Psychology and Neuroscience, Department of Basic and Clinical Neuroscience, King's College London, London, UK
| | - Beatriz Gomez Perez-Nievas
- Institute of Psychiatry, Psychology and Neuroscience, Department of Basic and Clinical Neuroscience, King's College London, London, UK
| | - Gabriella Leonarduzzi
- Department of Clinical and Biological Sciences, University of Turin, Orbassano, Turin, Italy
| |
Collapse
|
19
|
Abstract
The blood-brain barrier (BBB) is a critical regulator of CNS homeostasis. It possesses physical and biochemical characteristics (i.e. tight junction protein complexes, transporters) that are necessary for the BBB to perform this physiological role. Microvascular endothelial cells require support from astrocytes, pericytes, microglia, neurons, and constituents of the extracellular matrix. This intricate relationship implies the existence of a neurovascular unit (NVU). NVU cellular components can be activated in disease and contribute to dynamic remodeling of the BBB. This is especially true of microglia, the resident immune cells of the brain, which polarize into distinct proinflammatory (M1) or anti-inflammatory (M2) phenotypes. Current data indicate that M1 pro-inflammatory microglia contribute to BBB dysfunction and vascular "leak", while M2 anti-inflammatory microglia play a protective role at the BBB. Understanding biological mechanisms involved in microglia activation provides a unique opportunity to develop novel treatment approaches for neurological diseases. In this review, we highlight characteristics of M1 proinflammatory and M2 anti-inflammatory microglia and describe how these distinct phenotypes modulate BBB physiology. Additionally, we outline the role of other NVU cell types in regulating microglial activation and highlight how microglia can be targeted for treatment of disease with a focus on ischemic stroke and Alzheimer's disease.
Collapse
Affiliation(s)
- Patrick T Ronaldson
- Department of Pharmacology, College of Medicine University of Arizona, Tucson, AZ, USA
| | - Thomas P Davis
- Department of Pharmacology, College of Medicine University of Arizona, Tucson, AZ, USA
| |
Collapse
|
20
|
Bartlett S, Gemiarto AT, Ngo MD, Sajiir H, Hailu S, Sinha R, Foo CX, Kleynhans L, Tshivhula H, Webber T, Bielefeldt-Ohmann H, West NP, Hiemstra AM, MacDonald CE, Christensen LVV, Schlesinger LS, Walzl G, Rosenkilde MM, Mandrup-Poulsen T, Ronacher K. GPR183 Regulates Interferons, Autophagy, and Bacterial Growth During Mycobacterium tuberculosis Infection and Is Associated With TB Disease Severity. Front Immunol 2020; 11:601534. [PMID: 33240287 PMCID: PMC7677584 DOI: 10.3389/fimmu.2020.601534] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2020] [Accepted: 10/14/2020] [Indexed: 12/15/2022] Open
Abstract
Oxidized cholesterols have emerged as important signaling molecules of immune function, but little is known about the role of these oxysterols during mycobacterial infections. We found that expression of the oxysterol-receptor GPR183 was reduced in blood from patients with tuberculosis (TB) and type 2 diabetes (T2D) compared to TB patients without T2D and was associated with TB disease severity on chest x-ray. GPR183 activation by 7α,25-dihydroxycholesterol (7α,25-OHC) reduced growth of Mycobacterium tuberculosis (Mtb) and Mycobacterium bovis BCG in primary human monocytes, an effect abrogated by the GPR183 antagonist GSK682753. Growth inhibition was associated with reduced IFN-β and IL-10 expression and enhanced autophagy. Mice lacking GPR183 had significantly increased lung Mtb burden and dysregulated IFNs during early infection. Together, our data demonstrate that GPR183 is an important regulator of intracellular mycobacterial growth and interferons during mycobacterial infection.
Collapse
MESH Headings
- Animals
- Autophagy
- Bacterial Load
- Case-Control Studies
- Diabetes Mellitus, Type 2/immunology
- Diabetes Mellitus, Type 2/metabolism
- Disease Models, Animal
- Female
- Host-Pathogen Interactions
- Humans
- Interferons/metabolism
- Leukocytes, Mononuclear/immunology
- Leukocytes, Mononuclear/metabolism
- Leukocytes, Mononuclear/microbiology
- Lung/immunology
- Lung/metabolism
- Lung/microbiology
- Male
- Mice, Inbred C57BL
- Mice, Knockout
- Mycobacterium bovis/growth & development
- Mycobacterium bovis/immunology
- Mycobacterium bovis/pathogenicity
- Mycobacterium tuberculosis/growth & development
- Mycobacterium tuberculosis/immunology
- Mycobacterium tuberculosis/pathogenicity
- Receptors, G-Protein-Coupled/genetics
- Receptors, G-Protein-Coupled/metabolism
- Severity of Illness Index
- Signal Transduction
- THP-1 Cells
- Tuberculosis, Pulmonary/immunology
- Tuberculosis, Pulmonary/metabolism
- Tuberculosis, Pulmonary/microbiology
Collapse
Affiliation(s)
- Stacey Bartlett
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Adrian Tandhyka Gemiarto
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Minh Dao Ngo
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Haressh Sajiir
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Semira Hailu
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Roma Sinha
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Cheng Xiang Foo
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
| | - Léanie Kleynhans
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Happy Tshivhula
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Tariq Webber
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Helle Bielefeldt-Ohmann
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, QLD, Australia
| | - Nicholas P. West
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, QLD, Australia
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, QLD, Australia
| | - Andriette M. Hiemstra
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | - Candice E. MacDonald
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | | | - Larry S. Schlesinger
- Host-Pathogens Interactions Program, Texas Biomedical Research Institute, San Antonio, TX, United States
| | - Gerhard Walzl
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
| | | | | | - Katharina Ronacher
- Translational Research Institute–Mater Research Institute, The University of Queensland, Brisbane, QLD, Australia
- DSI-NRF Centre of Excellence for Biomedical Tuberculosis Research, South African Medical Research Council Centre for Tuberculosis Research, Division of Molecular Biology and Human Genetics, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
- Australian Infectious Diseases Research Centre, The University of Queensland, Brisbane, QLD, Australia
| |
Collapse
|
21
|
Braden K, Giancotti LA, Chen Z, DeLeon C, Latzo N, Boehn T, D'Cunha N, Thompson BM, Doyle TM, McDonald JG, Walker JK, Kolar GR, Arnatt CK, Salvemini D. GPR183-Oxysterol Axis in Spinal Cord Contributes to Neuropathic Pain. J Pharmacol Exp Ther 2020; 375:367-375. [PMID: 32913007 DOI: 10.1124/jpet.120.000105] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 08/25/2020] [Indexed: 12/31/2022] Open
Abstract
Neuropathic pain is a debilitating public health concern for which novel non-narcotic therapeutic targets are desperately needed. Using unbiased transcriptomic screening of the dorsal horn spinal cord after nerve injury we have identified that Gpr183 (Epstein-Barr virus-induced gene 2) is upregulated after chronic constriction injury (CCI) in rats. GPR183 is a chemotactic receptor known for its role in the maturation of B cells, and the endogenous ligand is the oxysterol 7α,25-dihydroxycholesterol (7α,25-OHC). The role of GPR183 in the central nervous system is not well characterized, and its role in pain is unknown. The profile of commercially available probes for GPR183 limits their use as pharmacological tools to dissect the roles of this receptor in pathophysiological settings. Using in silico modeling, we have screened a library of 5 million compounds to identify several novel small-molecule antagonists of GPR183 with nanomolar potency. These compounds are able to antagonize 7α,25-OHC-induced calcium mobilization in vitro with IC50 values below 50 nM. In vivo intrathecal injections of these antagonists during peak pain after CCI surgery reversed allodynia in male and female mice. Acute intrathecal injection of the GPR183 ligand 7α,25-OHC in naïve mice induced dose-dependent allodynia. Importantly, this effect was blocked using our novel GPR183 antagonists, suggesting spinal GPR183 activation as pronociceptive. These studies are the first to reveal a role for GPR183 in neuropathic pain and identify this receptor as a potential target for therapeutic intervention. SIGNIFICANCE STATEMENT: We have identified several novel GPR183 antagonists with nanomolar potency. Using these antagonists, we have demonstrated that GPR183 signaling in the spinal cord is pronociceptive. These studies are the first to reveal a role for GPR183 in neuropathic pain and identify it as a potential target for therapeutic intervention.
Collapse
Affiliation(s)
- Kathryn Braden
- INRAe, UMR 1280, Physiopathologie des Adaptations Nutritionnelles, CHU Hôtel-Dieu, Nantes, France (F.K.-C., M.T., K.O.) and Physiogenex SAS, Prologue Biotech, Rue Pierre et Marie Curie, Laboratoryège-Innopole, France (F.B., T.S.)
| | - Luigino Antonio Giancotti
- INRAe, UMR 1280, Physiopathologie des Adaptations Nutritionnelles, CHU Hôtel-Dieu, Nantes, France (F.K.-C., M.T., K.O.) and Physiogenex SAS, Prologue Biotech, Rue Pierre et Marie Curie, Laboratoryège-Innopole, France (F.B., T.S.)
| | - Zhoumou Chen
- INRAe, UMR 1280, Physiopathologie des Adaptations Nutritionnelles, CHU Hôtel-Dieu, Nantes, France (F.K.-C., M.T., K.O.) and Physiogenex SAS, Prologue Biotech, Rue Pierre et Marie Curie, Laboratoryège-Innopole, France (F.B., T.S.)
| | - Chelsea DeLeon
- INRAe, UMR 1280, Physiopathologie des Adaptations Nutritionnelles, CHU Hôtel-Dieu, Nantes, France (F.K.-C., M.T., K.O.) and Physiogenex SAS, Prologue Biotech, Rue Pierre et Marie Curie, Laboratoryège-Innopole, France (F.B., T.S.)
| | - Nick Latzo
- INRAe, UMR 1280, Physiopathologie des Adaptations Nutritionnelles, CHU Hôtel-Dieu, Nantes, France (F.K.-C., M.T., K.O.) and Physiogenex SAS, Prologue Biotech, Rue Pierre et Marie Curie, Laboratoryège-Innopole, France (F.B., T.S.)
| | | | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Bar-Or A, Pender MP, Khanna R, Steinman L, Hartung HP, Maniar T, Croze E, Aftab BT, Giovannoni G, Joshi MA. Epstein-Barr Virus in Multiple Sclerosis: Theory and Emerging Immunotherapies. Trends Mol Med 2019; 26:296-310. [PMID: 31862243 PMCID: PMC7106557 DOI: 10.1016/j.molmed.2019.11.003] [Citation(s) in RCA: 151] [Impact Index Per Article: 30.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 10/31/2019] [Accepted: 11/06/2019] [Indexed: 12/12/2022]
Abstract
New treatments for multiple sclerosis (MS) focused on B cells have created an atmosphere of excitement in the MS community. B cells are now known to play a major role in disease, demonstrated by the highly impactful effect of a B cell-depleting antibody on controlling MS. The idea that a virus may play a role in the development of MS has a long history and is supported mostly by studies demonstrating a link between B cell-tropic Epstein–Barr virus (EBV) and disease onset. Efforts to develop antiviral strategies for treating MS are underway. Although gaps remain in our understanding of the etiology of MS, the role, if any, of viruses in propagating pathogenic immune responses deserves attention.
Collapse
Affiliation(s)
- Amit Bar-Or
- Center for Neuroinflammation and Experimental Therapeutics, Department of Neurology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Michael P Pender
- Faculty of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Rajiv Khanna
- Centre for Immunotherapy and Vaccine Development, Queensland Institute of Medical Research (QIMR) Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Lawrence Steinman
- Department of Neurology and Neurological Sciences, Beckman Center for Molecular Medicine, Stanford University Medical Center, Stanford, CA, USA
| | - Hans-Peter Hartung
- Department of Neurology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
| | - Tap Maniar
- Clinical Development, Torque Therapeutics, Boston, MA, USA
| | - Ed Croze
- IRIS-Bay, San Francisco, CA, USA.
| | - Blake T Aftab
- Preclinical Science and Translational Medicine, Atara Biotherapeutics, South San Francisco, CA, USA
| | - Gavin Giovannoni
- Blizard Institute, Queen Mary University London, Barts and the London School of Medicine, London, UK
| | - Manher A Joshi
- Medical Affairs, Atara Biotherapeutics, South San Francisco, CA, USA
| |
Collapse
|
23
|
Wang Y, Ni J, Zhai L, Gao C, Xie L, Zhao L, Yin X. Inhibition of activated astrocyte ameliorates lipopolysaccharide- induced depressive-like behaviors. J Affect Disord 2019; 242:52-9. [PMID: 30172225 DOI: 10.1016/j.jad.2018.08.015] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/05/2018] [Accepted: 08/07/2018] [Indexed: 12/19/2022]
Abstract
BACKGROUND Numerous studies indicate that inflammation plays important roles in the development of depression. Astrocytes are crucial regulators of immune response in the central nervous system, and strongly activated by pro-inflammatory cytokines. We hypothesized that inhibition of activated astrocytes contributed to ameliorate depressive-like symptoms. METHODS This study evaluated the antidepressant-like effect of inhibition of activated astrocytes, by a well-established astrocyte inactivator fluorocitrate (FC), on a lipopolysaccharide (LPS)-induced model of depression. Forced swim test (FST), tail suspension test (TST) and sucrose preference test were used to assess depressive-like behaviors. The expression of fibrillary acidic protein (GFAP), brain-derived neurotrophic factor (BDNF) and neuroinflammation were determined in the hippocampus and cortex. RESULTS The results demonstrated that LPS increased immobility time in the TST and FST, reduced sucrose preference as well. LPS also enhanced the expression of IL-1β, TNF-α, iNOS and GFAP, accompanying with decreased expression of BDNF in the hippocampus and cortex. Inhibition of activated astrocytes by FC significantly prevented LPS- induced alteration in the FST, TST and sucrose preference test. Moreover, in the hippocampus and cortex, inhibition of activated astrocytes by FC significantly attenuated increases of neuroinflammation and GFAP whereas reversed decrease of BDNF in LPS- challenged depression. CONCLUSIONS Taken together, the results suggest that inhibition of activated astrocytes ameliorates LPS-induced depressive-like behavior, providing the first evidence that inhibition of activated astrocytes might represent a novel therapeutic target for depression.
Collapse
|
24
|
Dozio V, Sanchez JC. Profiling the proteomic inflammatory state of human astrocytes using DIA mass spectrometry. J Neuroinflammation 2018; 15:331. [PMID: 30501627 PMCID: PMC6267034 DOI: 10.1186/s12974-018-1371-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 11/18/2018] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Astrocytes are the most abundant cells in the central nervous system and are responsible for a wide range of functions critical to normal neuronal development, synapse formation, blood-brain barrier regulation, and brain homeostasis. They are also actively involved in initiating and perpetuating neuroinflammatory responses. However, information about their proteomic phenotypes under inflammation is currently limited. METHOD Data-independent acquisition mass spectrometry was applied to extensively characterize the profile of more than 4000 proteins in immortalized human fetal astrocytes under distinct inflammatory conditions induced by TNF, IL-1β, and LPS, while multiplex immunoassay-based screening was used to quantify a wide range of cytokines released under these inflammatory conditions. Then, immunocytochemistry and western blotting were used to verify the activation of canonical and non-canonical NF-κB upon exposure to the different stimuli. Finally, an in vitro model of the blood-brain barrier consisting of a co-culture of primary human brain microvascular endothelial cells and primary human astrocytes was used to verify the inflammatory response of astrocytes upon LPS exposure in a more complex in vitro system. RESULTS We reported on a set of 186 proteins whose levels were significantly modulated by TNF, IL-1β, and LPS. These three stimuli induced proteome perturbations, which led to an increased abundance of key inflammatory proteins involved in antigen presentation and non-canonical NF-κB pathways. TNF and IL-1β, but not LPS, also activated the canonical NF-κB pathway, which in turn led to an extensive inflammatory response and dysregulation of cytoskeletal and adhesion proteins. In addition, TNF and LPS, but not IL-1β, increased the abundance of several interferon-stimulated gene products. Finally, TNF and IL-1β similarly upregulated the secretion of several cytokines and chemokines, whereas LPS only induced a moderate increase in IL-8, IFN-γ, and IL-1β secretion. Upregulation of proteins associated with type I IFN and non-canonical NF-κB signaling was also observed in primary astrocytes co-cultured with primary brain microvascular endothelial cells exposed to LPS. CONCLUSIONS The present study provides comprehensive information about the proteomic phenotypes of human astrocytes upon exposure to inflammatory stimuli both in monoculture and in co-culture with human brain microvascular endothelial cells.
Collapse
Affiliation(s)
- Vito Dozio
- Department of Internal Medicine Specialties, Faculty of Medicine, University of Geneva, 1 Rue Michel Servet, 1211, Geneva 4, Switzerland.,Swiss Centre for Applied Human Toxicology, Geneva, Switzerland
| | - Jean-Charles Sanchez
- Department of Internal Medicine Specialties, Faculty of Medicine, University of Geneva, 1 Rue Michel Servet, 1211, Geneva 4, Switzerland. .,Swiss Centre for Applied Human Toxicology, Geneva, Switzerland.
| |
Collapse
|
25
|
Barington L, Wanke F, Niss Arfelt K, Holst PJ, Kurschus FC, Rosenkilde MM. EBI2 in splenic and local immune responses and in autoimmunity. J Leukoc Biol 2018; 104:313-322. [DOI: 10.1002/jlb.2vmr1217-510r] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 03/15/2018] [Accepted: 03/16/2018] [Indexed: 12/13/2022] Open
Affiliation(s)
- L. Barington
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
| | - F. Wanke
- Institute for Molecular Medicine; University Medical Center of the Johannes Gutenberg-University Mainz; Mainz Germany
| | - K. Niss Arfelt
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
| | - P. J. Holst
- Department of Immunology and Microbiology; University of Copenhagen; Copenhagen Denmark
| | - F. C. Kurschus
- Institute for Molecular Medicine; University Medical Center of the Johannes Gutenberg-University Mainz; Mainz Germany
| | - M. M. Rosenkilde
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
| |
Collapse
|
26
|
Abstract
Dihydroxycholesterols such as 7α,25-dihydroxysterols (7α,25-OHC) and 7α,27-OHC are generated from cholesterol by the enzymes CH25H, CYP7B1 and CYP27A1 in steady state but also in the context of inflammation. The G-protein coupled receptor (GPCR) Epstein-Barr virus-induced gene 2 (EBI2), also known as GPR183, senses these oxysterols and induces chemotactic migration of immune cells towards higher concentrations of these ligands. We recently showed that these ligands are upregulated in the CNS in experimental autoimmune encephalomyelitis (EAE), an animal model for multiple sclerosis and that EBI2 enhanced early infiltration of encephalitogenic T cells into the CNS. In this short-review we discuss the role of dihydroxysterol-sensing by immune cells in neuroinflammation.
Collapse
Affiliation(s)
- Florian C Kurschus
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany.
| | - Florian Wanke
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| |
Collapse
|