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Gao Y, Slomnicki LP, Kilanczyk E, Forston MD, Pietrzak M, Rouchka EC, Howard RM, Whittemore SR, Hetman M. Reduced Expression of Oligodendrocyte Linage-Enriched Transcripts During the Endoplasmic Reticulum Stress/Integrated Stress Response. ASN Neuro 2024; 16:2371162. [PMID: 39024571 DOI: 10.1080/17590914.2024.2371162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 04/12/2024] [Indexed: 07/20/2024] Open
Abstract
Endoplasmic reticulum (ER) stress in oligodendrocyte (OL) linage cells contributes to several CNS pathologies including traumatic spinal cord injury (SCI) and multiple sclerosis. Therefore, primary rat OL precursor cell (OPC) transcriptomes were analyzed using RNASeq after treatments with two ER stress-inducing drugs, thapsigargin (TG) or tunicamycin (TM). Gene ontology term (GO) enrichment showed that both drugs upregulated mRNAs associated with the general stress response. The GOs related to ER stress were only enriched for TM-upregulated mRNAs, suggesting greater ER stress selectivity of TM. Both TG and TM downregulated cell cycle/cell proliferation-associated transcripts, indicating the anti-proliferative effects of ER stress. Interestingly, many OL lineage-enriched mRNAs were downregulated, including those for transcription factors that drive OL identity such as Olig2. Moreover, ER stress-associated decreases of OL-specific gene expression were found in mature OLs from mouse models of white matter pathologies including contusive SCI, toxin-induced demyelination, and Alzheimer's disease-like neurodegeneration. Taken together, the disrupted transcriptomic fingerprint of OL lineage cells may facilitate myelin degeneration and/or dysfunction when pathological ER stress persists in OL lineage cells.
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Affiliation(s)
- Yonglin Gao
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Lukasz P Slomnicki
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Ewa Kilanczyk
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Michael D Forston
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Maciej Pietrzak
- Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio, USA
| | - Eric C Rouchka
- Kentucky Biomedical Research Infrastructure Network Bioinformatics Core, University of Louisville, Louisville, Kentucky, USA
| | - Russell M Howard
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Scott R Whittemore
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Anatomical Sciences & Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Pharmacology & Toxicology, University of Louisville School of Medicine, Louisville, Kentucky, USA
| | - Michal Hetman
- Kentucky Spinal Cord Injury Research Center, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Departments of Neurological Surgery, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Anatomical Sciences & Neurobiology, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Pharmacology & Toxicology, University of Louisville School of Medicine, Louisville, Kentucky, USA
- Biochemistry and Molecular Genetics, University of Louisville School of Medicine, Louisville, Kentucky, USA
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Alam MZ, Bagabir HA, Zaher MAF, Alqurashi TMA, Alghamdi BS, Kazi M, Ashraf GM, Alshahrany GA, Alzahrani NA, Bakhalgi RM, Juweiriya, Al-Thepyani M, AboTaleb HA, Aldhahri RS, El-Aziz GSA, Al-Abbasi FA, Eibani LK, Alzahrani FJ, Khan MSA. Black Seed Oil-Based Curcumin Nanoformulations Ameliorated Cuprizone-Induced Demyelination in the Mouse Hippocampus. Mol Neurobiol 2024:10.1007/s12035-024-04310-5. [PMID: 38890237 DOI: 10.1007/s12035-024-04310-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Accepted: 06/14/2024] [Indexed: 06/20/2024]
Abstract
Multiple sclerosis (MS) is a neurodegenerative disease characterized by the demyelination of nerves, axonal damage, and neuroinflammation. Cognition impairment, pain, and loss of mobility are some of the usual complications of MS. It has been postulated that the overproduction of proinflammatory cytokines and reactive oxygen species (ROS) are the main factors that contribute to MS pathology. Among various animal models, the cuprizone model is the most widely used model for investigating MS-related pathology. We assessed the effects of cuprizone along with the protective effects of some black seed oil-based nanoformulations of curcumin with and without piperine, in mice hippocampus in terms of the changes in antioxidant enzymes, transcription factors, and cytokines during demyelination and remyelination processes. The results of behavioral studies point toward impairment in working memory following the feeding of cuprizone for 5 weeks. However, in treatment groups, mice seemed to prevent the toxic effects of cuprizone. Nanoformulations used in this study were found to be highly effective in lowering the amount of ROS as indicated by the levels of antioxidant enzymes like catalase, superoxide dismutase, glutathione, and glutathione peroxidase. Moreover, nanoformulations CCF and CCPF were observed resisting the toxic effects of cuprizone. We observed greater expression of NFκB-p65 in the CPZ group than in the control group. CCF nanoformulation had a better inhibitory effect on NFκB-p65 than other formulations. Histological examination of the hippocampus was also conducted. Nanoformulations used here were found effective in reversing MS-related pathophysiology and hence have the potential to be applied as adjuvant therapy for MS treatment.
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Affiliation(s)
- Mohammad Zubair Alam
- Neuroscience and Geroscience Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Hala Abubaker Bagabir
- Department of Physiology, Faculty of Medicine, King Abdulaziz University, Rabigh Campus, Jeddah, Saudi Arabia
| | | | - Thamer M A Alqurashi
- Department of Pharmacology, Faculty of Medicine, Rabigh Campus, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Badrah S Alghamdi
- Neuroscience and Geroscience Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Physiology, Neuroscience Unit, Faculty of Medicine, King Abdulaziz University, 22252, Jeddah, Saudi Arabia
| | - Mohsin Kazi
- Department of Pharmaceutics, College of Pharmacy, King Saud University, P.O. BOX-2457, 11451, Riyadh, Saudi Arabia
| | - Ghulam Md Ashraf
- Neuroscience and Geroscience Research Unit, King Fahd Medical Research Center, King Abdulaziz University, Jeddah, Saudi Arabia.
- Department of Medical Laboratory Technology, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia.
| | - Gadah Ali Alshahrany
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Noor Ahmed Alzahrani
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Rafal Mohammed Bakhalgi
- Department of Microbiology, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Juweiriya
- Department of Chemistry, Aligarh Muslim University, Aligarh, UP, India
| | - Mona Al-Thepyani
- Department of Chemistry, College of Sciences & Arts, King Abdulaziz University, Rabigh Campus, Jeddah, Saudi Arabia
| | | | - Rahaf Saeed Aldhahri
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Department of Biological Sciences, Faculty of Sciences, University of Jeddah, Jeddah, Saudi Arabia
| | - Gamal Said Abd El-Aziz
- Department of Clinical Anatomy, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Fahad A Al-Abbasi
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Loay Khaled Eibani
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Faisal Jaman Alzahrani
- Department of Biochemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Mohd Sajjad Ahmad Khan
- Department of Basic Sciences, Deanship of Preparatory Year and Supporting Studies, Imam Abdulrahman Bin Faisal University, Dammam, Saudi Arabia
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3
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Garton T, Gadani SP, Gill AJ, Calabresi PA. Neurodegeneration and demyelination in multiple sclerosis. Neuron 2024:S0896-6273(24)00372-6. [PMID: 38889714 DOI: 10.1016/j.neuron.2024.05.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 06/20/2024]
Abstract
Progressive multiple sclerosis (PMS) is an immune-initiated neurodegenerative condition that lacks effective therapies. Although peripheral immune infiltration is a hallmark of relapsing-remitting MS (RRMS), PMS is associated with chronic, tissue-restricted inflammation and disease-associated reactive glial states. The effector functions of disease-associated microglia, astrocytes, and oligodendrocyte lineage cells are beginning to be defined, and recent studies have made significant progress in uncovering their pathologic implications. In this review, we discuss the immune-glia interactions that underlie demyelination, failed remyelination, and neurodegeneration with a focus on PMS. We highlight the common and divergent immune mechanisms by which glial cells acquire disease-associated phenotypes. Finally, we discuss recent advances that have revealed promising novel therapeutic targets for the treatment of PMS and other neurodegenerative diseases.
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Affiliation(s)
- Thomas Garton
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Sachin P Gadani
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Alexander J Gill
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Peter A Calabresi
- Division of Neuroimmunology, Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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4
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Anilkumar S, Wright-Jin E. NF-κB as an Inducible Regulator of Inflammation in the Central Nervous System. Cells 2024; 13:485. [PMID: 38534329 DOI: 10.3390/cells13060485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/01/2024] [Accepted: 03/09/2024] [Indexed: 03/28/2024] Open
Abstract
The NF-κB (nuclear factor K-light-chain-enhancer of activated B cells) transcription factor family is critical for modulating the immune proinflammatory response throughout the body. During the resting state, inactive NF-κB is sequestered by IκB in the cytoplasm. The proteasomal degradation of IκB activates NF-κB, mediating its translocation into the nucleus to act as a nuclear transcription factor in the upregulation of proinflammatory genes. Stimuli that initiate NF-κB activation are diverse but are canonically attributed to proinflammatory cytokines and chemokines. Downstream effects of NF-κB are cell type-specific and, in the majority of cases, result in the activation of pro-inflammatory cascades. Acting as the primary immune responders of the central nervous system, microglia exhibit upregulation of NF-κB upon activation in response to pathological conditions. Under such circumstances, microglial crosstalk with other cell types in the central nervous system can induce cell death, further exacerbating the disease pathology. In this review, we will emphasize the role of NF-κB in triggering neuroinflammation mediated by microglia.
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Affiliation(s)
- Sudha Anilkumar
- Neonatal Brain Injury Laboratory, Division of Biomedical Research, Nemours Children's Health, Wilmington, DE 19803, USA
| | - Elizabeth Wright-Jin
- Neonatal Brain Injury Laboratory, Division of Biomedical Research, Nemours Children's Health, Wilmington, DE 19803, USA
- Division of Neurology, Department of Pediatrics, Nemours Children's Health, Wilmington, DE 19803, USA
- Department of Psychological and Brain Sciences, University of Delaware, Newark, DE 19716, USA
- Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA 19107, USA
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5
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Yang Y, He Z, Wu S. Ursolic acid alleviates paclitaxel-induced peripheral neuropathy through PPARγ activation. Toxicol Appl Pharmacol 2024; 484:116883. [PMID: 38437959 DOI: 10.1016/j.taap.2024.116883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2023] [Revised: 02/10/2024] [Accepted: 03/01/2024] [Indexed: 03/06/2024]
Abstract
BACKGROUND Chemotherapy-induced peripheral neuropathy (CIPN) reduces the overall quality of life and leads to interruption of chemotherapy. Ursolic acid, a triterpenoid naturally which presents in fruit peels and in many herbs and spices, can function as a peroxisome proliferator-activated receptor γ (PPARγ) agonist, and has been widely used as an herbal medicine with a wide spectrum of pharmacological activities, including anti-cancer, anti-inflammatory and neuroprotective effect. METHODS We used a phenotypic drug screening approach to identify ursolic acid as a potential neuroprotective drug in vitro and in vivo and carried out additional biochemical experiments to identify its mechanism of action. RESULTS Our study demonstrated that ursolic acid reduced neurotoxicity and cell apoptosis induced by pacilitaxel, resulting in an improvement of CIPN. Moreover, we explored the potential mechanisms of ursolic acid on CIPN. As a result, ursolic acid inhibited CHOP (C/EBP Homologous Protein) expression, indicating the endoplasmic reticulum (ER) stress suppression, and regulating CHOP related apoptosis regulator (the Bcl2 family) to reverse pacilitaxel induced apoptosis. Moreover, we showed that the therapeutic effect of ursolic acid on the pacilitaxel-induced peripheral neuropathy is PPARγ dependent. CONCLUSIONS Taken together, the present study suggests ursolic acid has potential as a new PPARγ agonist targeting ER stress-related apoptotic pathways to ameliorate pacilitaxel-induced peripheral neuropathic pain and nerve injury, providing new clinical therapeutic method for CIPN.
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Affiliation(s)
- Yulian Yang
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, Shaanxi 710072, China
| | - Zhongzheng He
- Department of Neurosurgery, Mini-invasive Neurosurgery and Translational Medical Center, Xi'an Central Hospital, Xi'an Jiaotong University, Shaanxi 710003, China
| | - Shuangchan Wu
- Xi'an Key Laboratory of Stem Cell and Regenerative Medicine, Institute of Medical Research, Northwestern Polytechnical University, Shaanxi 710072, China; Research & Development Institute of Northwestern Polytechnical University, Shenzhen, Guangdong 518057, China.
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6
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Lei Z, Lin W. Mechanisms Governing Oligodendrocyte Viability in Multiple Sclerosis and Its Animal Models. Cells 2024; 13:116. [PMID: 38247808 PMCID: PMC10814231 DOI: 10.3390/cells13020116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/23/2024] Open
Abstract
Multiple sclerosis (MS) is a chronic autoimmune inflammatory demyelinating disease of the central nervous system (CNS), which is triggered by an autoimmune assault targeting oligodendrocytes and myelin. Recent research indicates that the demise of oligodendrocytes due to an autoimmune attack contributes significantly to the pathogenesis of MS and its animal model experimental autoimmune encephalomyelitis (EAE). A key challenge in MS research lies in comprehending the mechanisms governing oligodendrocyte viability and devising therapeutic approaches to enhance oligodendrocyte survival. Here, we provide an overview of recent findings that highlight the contributions of oligodendrocyte death to the development of MS and EAE and summarize the current literature on the mechanisms governing oligodendrocyte viability in these diseases.
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Affiliation(s)
- Zhixin Lei
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China;
| | - Wensheng Lin
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
- Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
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7
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Talukdar G, Orr HT, Lei Z. The PERK pathway: beneficial or detrimental for neurodegenerative diseases and tumor growth and cancer. Hum Mol Genet 2023; 32:2545-2557. [PMID: 37384418 PMCID: PMC10407711 DOI: 10.1093/hmg/ddad103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 06/04/2023] [Accepted: 06/05/2023] [Indexed: 07/01/2023] Open
Abstract
Protein kinase R (PKR)-like endoplasmic reticulum (ER) kinase (PERK) is one of the three major sensors in the unfolded protein response (UPR). The UPR is involved in the modulation of protein synthesis as an adaptive response. Prolonged PERK activity correlates with the development of diseases and the attenuation of disease severity. Thus, the current debate focuses on the role of the PERK signaling pathway either in accelerating or preventing diseases such as neurodegenerative diseases, myelin disorders, and tumor growth and cancer. In this review, we examine the current findings on the PERK signaling pathway and whether it is beneficial or detrimental for the above-mentioned disorders.
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Affiliation(s)
- Gourango Talukdar
- Institute for Translational Neuroscience and Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
| | - Harry T Orr
- Institute for Translational Neuroscience and Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
| | - Zhixin Lei
- Institute for Translational Neuroscience and Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Neuroscience, University of Minnesota, Minneapolis, MN 55455, USA
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8
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Feng L, Chao J, Ye P, Luong Q, Sun G, Liu W, Cui Q, Flores S, Jackson N, Shayento ANH, Sun G, Liu Z, Hu W, Shi Y. Developing Hypoimmunogenic Human iPSC-Derived Oligodendrocyte Progenitor Cells as an Off-The-Shelf Cell Therapy for Myelin Disorders. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2206910. [PMID: 37271923 PMCID: PMC10427412 DOI: 10.1002/advs.202206910] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 04/27/2023] [Indexed: 06/06/2023]
Abstract
Demyelinating disorders are among the most common and debilitating diseases in neurology. Canavan disease (CD) is a lethal demyelinating disease caused by mutation of the aspartoacylase (ASPA) gene, which leads to the accumulation of its substrate N-acetyl-l-aspartate (NAA), and consequently demyelination and vacuolation in the brain. In this study, hypoimmunogenic human induced pluripotent stem cell (iPSC)-derived oligodendrocyte progenitor cells (OPC) are developed from a healthy donor as an "off-the-shelf" cell therapy. Hypoimmunogenic iPSCs are generated through CRISPR/Cas9 editing of the human leukocyte antigen (HLA) molecules in healthy donor-derived iPSCs and differentiated into OPCs. The OPCs are engrafted into the brains of CD (nur7) mice and exhibit widespread distribution in the brain. The engrafted OPCs mature into oligodendrocytes that express the endogenous wildtype ASPA gene. Consequently, the transplanted mice exhibit elevated human ASPA expression and enzymatic activity and reduced NAA level in the brain. The transplanted OPCs are able to rescue major pathological features of CD, including defective myelination, extensive vacuolation, and motor function deficits. Moreover, the hypoimmunogenic OPCs exhibit low immunogenicity both in vitro and in vivo. The hypoimmunogenic OPCs can be used as "off-the-shelf" universal donor cells to treat various CD patients and many other demyelinating disorders, especially autoimmune demyelinating diseases, such as multiple sclerosis.
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Affiliation(s)
- Lizhao Feng
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Jianfei Chao
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Peng Ye
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Qui Luong
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Guoqiang Sun
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Wei Liu
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Qi Cui
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Sergio Flores
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Natasha Jackson
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Afm Nazmul Hoque Shayento
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Guihua Sun
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Zhenqing Liu
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Weidong Hu
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
- Department of Immunology and TheranosticsBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
| | - Yanhong Shi
- Department of Neurodegenerative DiseasesBeckman Research Institute of City of Hope1500 E. Duarte Rd.DuarteCA91010USA
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Wu S, Lin W. Endoplasmic reticulum associated degradation is essential for maintaining the viability or function of mature myelinating cells in adults. Glia 2023; 71:1360-1376. [PMID: 36708285 PMCID: PMC10023378 DOI: 10.1002/glia.24346] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 01/11/2023] [Accepted: 01/13/2023] [Indexed: 01/29/2023]
Abstract
Endoplasmic reticulum associated degradation (ERAD) is responsible for recognition and degradation of unfolded or misfolded proteins in the ER. Sel1L is essential for the ERAD activity of Sel1L-Hrd1 complex, the best-known ERAD machinery. Using a continuous Sel1L knockout mouse model (CNP/Cre; Sel1LloxP/loxP mice), our previous studies showed that Sel1L knockout in myelinating cells, oligodendrocytes in the central nervous system (CNS) and Schwann cells in the peripheral nervous system (PNS), leads to adult-onset myelin abnormalities in the CNS and PNS. Because Sel1L is deleted in myelinating cells of CNP/Cre; Sel1LloxP/loxP mice starting at very early stage of differentiation, it is impossible to rule out the possibility that the adult-onset myelin abnormalities in these mice results from developmental myelination defects caused by Sel1L knockout in myelinating cells during development. Thus, using an inducible Sel1L knockout mouse model (PLP/CreERT ; Sel1LloxP/loxP mice) that has normal, intact myelin and myelinating cells in the adult CNS and PNS prior to tamoxifen treatment, we sought to determine if Sel1L knockout in mature myelinating cells of adult mice leads to myelin abnormalities in the CNS and PNS. We showed that Sel1L knockout in mature myelinating cells caused ERAD impairment, ER stress and UPR activation. Interesting, Sel1L knockout in mature oligodendrocytes impaired their myelinating function by suppressing myelin protein translation, and resulted in progressive myelin thinning in the adult CNS. Conversely, Sel1L knockout in mature Schwann cells led to Schwann cell apoptosis and demyelination in the adult PNS. These findings demonstrate the essential roles of ERAD in mature myelinating cells in the adult CNS and PNS under physiological conditions.
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Affiliation(s)
- Shuangchan Wu
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, United States, 55455
- Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, United States, 55455
| | - Wensheng Lin
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, United States, 55455
- Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, United States, 55455
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10
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Schlett JS, Mettang M, Skaf A, Schweizer P, Errerd A, Mulugeta EA, Hein TM, Tsesmelis K, Tsesmelis M, Büttner UFG, Wendt H, Abaei A, Rasche V, Prex V, Nespoli E, Alami NO, Tews D, Walther P, Yilmazer-Hanke D, Oswald F, Dimou L, Wirth T, Baumann B. NF-κB is a critical mediator of post-mitotic senescence in oligodendrocytes and subsequent white matter loss. Mol Neurodegener 2023; 18:24. [PMID: 37069623 PMCID: PMC10108549 DOI: 10.1186/s13024-023-00616-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 03/25/2023] [Indexed: 04/19/2023] Open
Abstract
BACKGROUND Inflammaging represents an accepted concept where the immune system shifts to a low-grade chronic pro-inflammatory state without overt infection upon aging. In the CNS, inflammaging is mainly driven by glia cells and associated with neurodegenerative processes. White matter degeneration (WMD), a well-known process in the aging brain, manifests in myelin loss finally resulting in motor, sensory and cognitive impairments. Oligodendrocytes (OL) are responsible for homeostasis and maintenance of the myelin sheaths, which is a complex and highly energy demanding process sensitizing these cells to metabolic, oxidative and other forms of stress. Yet, the immediate impact of chronic inflammatory stress like inflammaging on OL homeostasis, myelin maintenance and WMD remains open. METHODS To functionally analyze the role of IKK/NF-κB signaling in the regulation of myelin homeostasis and maintenance in the adult CNS, we established a conditional mouse model allowing NF-κB activation in mature myelinating oligodendrocytes. IKK2-CAPLP-CreERT2 mice were characterized by biochemical, immunohistochemical, ultrastructural and behavioral analyses. Transcriptome data from isolated, primary OLs and microglia cells were explored by in silico pathway analysis and validated by complementary molecular approaches. RESULTS Chronic NF-κB activation in mature OLs leads to aggravated neuroinflammatory conditions phenocopying brain inflammaging. As a consequence, IKK2-CAPLP-CreERT2 mice showed specific neurological deficits and impaired motoric learning. Upon aging, persistent NF-κB signaling promotes WMD in these mice as ultrastructural analysis revealed myelination deficits in the corpus callosum accompanied by impaired myelin protein expression. RNA-Seq analysis of primary oligodendrocytes and microglia cells uncovers gene expression signatures associated with activated stress responses and increased post mitotic cellular senescence (PoMiCS) which was confirmed by elevated senescence-associated β-galactosidase activity and SASP gene expression profile. We identified an elevated integrated stress response (ISR) characterized by phosphorylation of eIF2α as a relevant molecular mechanism which is able to affect translation of myelin proteins. CONCLUSIONS Our findings demonstrate an essential role of IKK/NF-κB signaling in mature, post-mitotic OLs in regulating stress-induced senescence in these cells. Moreover, our study identifies PoMICS as an important driving force of age-dependent WMD as well as of traumatic brain injury induced myelin defects.
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Affiliation(s)
- Judith Stefanie Schlett
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Melanie Mettang
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Aladdin Skaf
- Molecular and Translational Neuroscience, Department of Neurology, University Medical Center Ulm, 89081, Ulm, Germany
| | - Pavel Schweizer
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Alina Errerd
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | | | - Tabea Melissa Hein
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Konstantinos Tsesmelis
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Miltiadis Tsesmelis
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Ulrike F G Büttner
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Heinrich Wendt
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Alireza Abaei
- Core Facility Small Animal Imaging (CF-SANI), Ulm University, 89081, Ulm, Germany
| | - Volker Rasche
- Core Facility Small Animal Imaging (CF-SANI), Ulm University, 89081, Ulm, Germany
| | - Vivien Prex
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Ester Nespoli
- Molecular and Translational Neuroscience, Department of Neurology, University Medical Center Ulm, 89081, Ulm, Germany
| | - Najwa Ouali Alami
- Institute of Clinical Neuroanatomy, Ulm University, Helmholtzstraße 8/1, 89081, Ulm, Germany
| | - Daniel Tews
- Core Facility Extracellular Flux Analyzer, Ulm University Medical Center, 89081, Ulm, Germany
| | - Paul Walther
- Central Facility for Electron Microscopy, Ulm University, 89081, Ulm, Germany
| | - Deniz Yilmazer-Hanke
- Institute of Clinical Neuroanatomy, Ulm University, Helmholtzstraße 8/1, 89081, Ulm, Germany
| | - Franz Oswald
- Department of Internal Medicine I, Center for Internal Medicine, University Medical Center Ulm, 89081, Ulm, Germany
| | - Leda Dimou
- Molecular and Translational Neuroscience, Department of Neurology, University Medical Center Ulm, 89081, Ulm, Germany
| | - Thomas Wirth
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany
| | - Bernd Baumann
- Institute of Physiological Chemistry, Ulm University, Albert- Einstein-Allee 11, 89081, Ulm, Germany.
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11
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Cao YY, Zhang Y, Gerile W, Guo Y, Wu LN, Wu LL, Song K, Lu WH, Yu JB. PLK1 protects intestinal barrier function during sepsis by targeting mitochondrial dynamics through TANK-NF-κB signalling. Mol Med 2022; 28:163. [PMID: 36581806 PMCID: PMC9801534 DOI: 10.1186/s10020-022-00597-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 12/22/2022] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Intestinal barrier integrity in the pathogenesis of sepsis is critical. Despite an abundance of evidence, the molecular mechanism of the intestinal barrier in sepsis pathology remains unclear. Here, we report a protective role of polo-like kinase 1 (PLK1) in intestinal barrier integrity during sepsis. METHODS Mice with PLK1 overexpression (CAG-PLK1 mice) or PLK1 inhibition (BI2536-treated mice) underwent caecal ligation and puncture (CLP) to establish a sepsis model. The intestinal barrier function, apoptosis in the intestinal epithelium, mitochondrial function and NF-κB signalling activity were evaluated. To suppress the activation of NF-κB signalling, the NF-κB inhibitor PDTC, was administered. The Caco-2 cell line was chosen to establish an intestinal epithelial injury model in vitro. RESULTS Sepsis destroyed intestinal barrier function, induced excessive apoptosis in the intestinal epithelium, and disrupted the balance of mitochondrial dynamics in wild-type mice. PLK1 overexpression alleviated sepsis-induced damage to the intestinal epithelium by inhibiting the activation of NF-κB signalling. PLK1 colocalized and interacted with TANK in Caco-2 cells. Transfecting Caco-2 cells with TANK-SiRNA suppressed NF-κB signalling and ameliorated mitochondrial dysfunction, apoptosis and the high permeability of cells induced by lipopolysaccharide (LPS). Furthermore, TANK overexpression impaired the protective effect of PLK1 on LPS-induced injuries in Caco-2 cells. CONCLUSION Our findings reveal that the PLK1/TANK/NF-κB axis plays a crucial role in sepsis-induced intestinal barrier dysfunction by regulating mitochondrial dynamics and apoptosis in the intestinal epithelium and might be a potential therapeutic target in the clinic.
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Affiliation(s)
- Ying-Ya Cao
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China ,grid.452929.10000 0004 8513 0241Department of Critical Care Medicine, The First Affiliated Hospital of Wannan Medical College, Wuhu, 241001 Anhui China
| | - Yuan Zhang
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
| | - Wuyun Gerile
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
| | - Yan Guo
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
| | - Li-Na Wu
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
| | - Li-Li Wu
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
| | - Kai Song
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
| | - Wei-Hua Lu
- grid.452929.10000 0004 8513 0241Department of Critical Care Medicine, The First Affiliated Hospital of Wannan Medical College, Wuhu, 241001 Anhui China
| | - Jian-Bo Yu
- Department of Anaesthesiology and Critical Care Medicine, Tianjin Nankai Hospital, Tianjin Medical University, Tianjin, 300100 China
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12
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Leo H, Kipp M. Remyelination in Multiple Sclerosis: Findings in the Cuprizone Model. Int J Mol Sci 2022; 23:ijms232416093. [PMID: 36555733 PMCID: PMC9783537 DOI: 10.3390/ijms232416093] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/14/2022] [Accepted: 12/15/2022] [Indexed: 12/23/2022] Open
Abstract
Remyelination therapies, which are currently under development, have a great potential to delay, prevent or even reverse disability in multiple sclerosis patients. Several models are available to study the effectiveness of novel compounds in vivo, among which is the cuprizone model. This model is characterized by toxin-induced demyelination, followed by endogenous remyelination after cessation of the intoxication. Due to its high reproducibility and ease of use, this model enjoys high popularity among various research and industrial groups. In this review article, we will summarize recent findings using this model and discuss the potential of some of the identified compounds to promote remyelination in multiple sclerosis patients.
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Affiliation(s)
| | - Markus Kipp
- Correspondence: ; Tel.: +49-(0)-381-494-8400
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13
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Rouillard ME, Hu J, Sutter PA, Kim HW, Huang JK, Crocker SJ. The Cellular Senescence Factor Extracellular HMGB1 Directly Inhibits Oligodendrocyte Progenitor Cell Differentiation and Impairs CNS Remyelination. Front Cell Neurosci 2022; 16:833186. [PMID: 35573828 PMCID: PMC9095917 DOI: 10.3389/fncel.2022.833186] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 03/23/2022] [Indexed: 12/27/2022] Open
Abstract
HMGB1 is a highly conserved, ubiquitous protein in eukaryotic cells. HMGB1 is normally localized to the nucleus, where it acts as a chromatin associated non-histone binding protein. In contrast, extracellular HMGB1 is an alarmin released by stressed cells to act as a danger associated molecular pattern (DAMP). We have recently determined that progenitor cells from multiple sclerosis patients exhibit a cellular senescent phenotype and release extracellular HMGB1 which directly impaired the maturation of oligodendrocyte progenitor cells (OPCs) to myelinating oligodendrocytes (OLs). Herein, we report that administration of recombinant HMGB1 into the spinal cord at the time of lysolecithin administration resulted in arrest of OPC differentiation in vivo, and a profound impairment of remyelination. To define the receptor by which extracellular HMGB1 mediates its inhibitory influence on OPCs to impair OL differentiation, we tested selective inhibitors against the four primary receptors known to mediate the effects of HMGB1, the toll-like receptors (TLRs)-2, -4, -9 or the receptor for advanced glycation end-products (RAGE). We found that inhibition of neither TLR9 nor RAGE increased OL differentiation in the presence of HMGB1, while inhibition of TLR4 resulted in partial restoration of OL differentiation and inhibiting TLR2 fully restored differentiation of OLs in the presence of HMGB1. Analysis of transcriptomic data (RNAseq) from OPCs identified an overrepresentation of NFκB regulated genes in OPCs when in the presence of HMGB1. We found that application of HMGB1 to OPCs in culture resulted in a rapid and concentration dependent shift in NFκB nuclear translocation which was also attenuated with coincident TLR2 inhibition. These data provide new information on how extracellular HMGB1 directly affects the differentiation potential of OPCs. Recent and past evidence for elevated HMGB1 released from senescent progenitor cells within demyelinated lesions in the MS brain suggests that a greater understanding of how this molecule acts on OPCs may unfetter the endogenous remyelination potential in MS.
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Affiliation(s)
- Megan E. Rouillard
- Department of Neuroscience, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Jingwen Hu
- Department of Biology and Center for Cell Reprogramming, Georgetown University, Washington, DC, United States
| | - Pearl A. Sutter
- Department of Neuroscience, University of Connecticut School of Medicine, Farmington, CT, United States
| | - Hee Won Kim
- Department of Biology and Center for Cell Reprogramming, Georgetown University, Washington, DC, United States
| | - Jeffrey K. Huang
- Department of Biology and Center for Cell Reprogramming, Georgetown University, Washington, DC, United States
| | - Stephen J. Crocker
- Department of Neuroscience, University of Connecticut School of Medicine, Farmington, CT, United States
- *Correspondence: Stephen J. Crocker
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14
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Garcia-Martin G, Alcover-Sanchez B, Wandosell F, Cubelos B. Pathways Involved in Remyelination after Cerebral Ischemia. Curr Neuropharmacol 2022; 20:751-765. [PMID: 34151767 PMCID: PMC9878953 DOI: 10.2174/1570159x19666210610093658] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 05/05/2021] [Accepted: 05/12/2021] [Indexed: 11/22/2022] Open
Abstract
Brain ischemia, also known as ischemic stroke, occurs when there is a lack of blood supply into the brain. When an ischemic insult appears, both neurons and glial cells can react in several ways that will determine the severity and prognosis. This high heterogeneity of responses has been a major obstacle in developing effective treatments or preventive methods for stroke. Although white matter pathophysiology has not been deeply assessed in stroke, its remodelling can greatly influence the clinical outcome and the disability degree. Oligodendrocytes, the unique cell type implied in CNS myelination, are sensible to ischemic damage. Loss of myelin sheaths can compromise axon survival, so new Oligodendrocyte Precursor Cells are required to restore brain function. Stroke can, therefore, enhance oligodendrogenesis to regenerate those new oligodendrocytes that will ensheath the damaged axons. Given that myelination is a highly complex process that requires coordination of multiple pathways such as Sonic Hedgehog, RTKs or Wnt/β-catenin, we will analyse new research highlighting their importance after brain ischemia. In addition, oligodendrocytes are not isolated cells inside the brain, but rather form part of a dynamic environment of interactions between neurons and glial cells. For this reason, we will put some context into how microglia and astrocytes react against stroke and influence oligodendrogenesis to highlight the relevance of remyelination in the ischemic brain. This will help to guide future studies to develop treatments focused on potentiating the ability of the brain to repair the damage.
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Affiliation(s)
- Gonzalo Garcia-Martin
- Departamento de Biología Molecular and Centro Biología Molecular “Severo Ochoa”, Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Berta Alcover-Sanchez
- Departamento de Biología Molecular and Centro Biología Molecular “Severo Ochoa”, Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Francisco Wandosell
- Departamento de Biología Molecular and Centro Biología Molecular “Severo Ochoa”, Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain
| | - Beatriz Cubelos
- Departamento de Biología Molecular and Centro Biología Molecular “Severo Ochoa”, Universidad Autónoma de Madrid-Consejo Superior de Investigaciones Científicas, 28049 Madrid, Spain,Address correspondence to this author at the Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Nicolás Cabrera 1, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Tel: 34-91-1964561; Fax: 34-91-1964420; E-mail:
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15
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Guerriero C, Puliatti G, Di Marino T, Tata AM. Effects Mediated by Dimethyl Fumarate on In Vitro Oligodendrocytes: Implications in Multiple Sclerosis. Int J Mol Sci 2022; 23:ijms23073615. [PMID: 35408975 PMCID: PMC8998768 DOI: 10.3390/ijms23073615] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 03/15/2022] [Accepted: 03/23/2022] [Indexed: 02/04/2023] Open
Abstract
Background: Dimethyl fumarate (DMF) is a drug currently in use in oral therapy for the treatment of relapsing-remitting multiple sclerosis (RRMS) due to its immunomodulatory and neuroprotective effects. The mechanisms by which DMF exerts its therapeutic effects in MS and in particular its influence on the oligodendrocytes (OLs) survival or differentiation have not yet been fully understood. Methods: Characterization of Oli neu cells was performed by immunocytochemistry and RT-PCR. The effect of DMF on cell proliferation and morphology was assessed by MTT assay, trypan blue staining, RT-PCR and Western blot analysis. The antioxidant and anti-inflammatory properties of DMF were analysed by ROS detection through DCFDA staining and lipid content analysis by Oil Red O staining and TLC. Results: DMF has been observed to induce a slowdown of cell proliferation, favoring the oligodendrocyte lineage cells (OLCs) differentiation. DMF has an antioxidant effect and is able to modify the lipid content even after the LPS-mediated inflammatory stimulus in Oli neu cells. Conclusions: The results obtained confirm that DMF has anti-inflammatory and antioxidant effects also on Oli neu cells. Interestingly, it appears to promote the OLCs differentiation towards mature and potentially myelinating cells.
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Affiliation(s)
- Claudia Guerriero
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (C.G.); (G.P.); (T.D.M.)
| | - Giulia Puliatti
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (C.G.); (G.P.); (T.D.M.)
| | - Tamara Di Marino
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (C.G.); (G.P.); (T.D.M.)
| | - Ada Maria Tata
- Department of Biology and Biotechnologies Charles Darwin, Sapienza University of Rome, 00185 Rome, Italy; (C.G.); (G.P.); (T.D.M.)
- Research Centre of Neurobiology Daniel Bovet, 00185 Rome, Italy
- Correspondence:
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16
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Roberti A, Chaffey LE, Greaves DR. NF-κB Signaling and Inflammation-Drug Repurposing to Treat Inflammatory Disorders? BIOLOGY 2022; 11:biology11030372. [PMID: 35336746 PMCID: PMC8945680 DOI: 10.3390/biology11030372] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/12/2022] [Accepted: 02/15/2022] [Indexed: 12/15/2022]
Abstract
Simple Summary Since its first description 35 years ago, the transcription factor NF-κB (nuclear factor κ-light-chain-enhancer of activated B cells) has been shown to be a key mediator of immune cell responses to inflammatory mediators, oxidative stress and genotoxic injury. Dysregulated NF-κB signalling drives inflammation in inflammatory disorders such as multiple sclerosis, rheumatoid arthritis or inflammatory bowel disease. Thus, re-establishing the appropriate regulation of NF-κB activity seems like a promising approach to treat inflammatory diseases. Current anti-inflammatory drugs have many, often serious, side effects. Thus, there is an unmet clinical need for safe and effective anti-inflammatory medicines that both decrease inflammatory mediator production and enhance endogenous anti-inflammatory and prorepair pathways. So far, traditional de novo drug discovery has fallen short of satisfying this need. Drug repurposing is a cost- and time-effective alternative to de novo drug development for the identification of novel applications and has already resulted in the identification of effective anti-inflammatories in the ongoing COVID-19 pandemic. In this paper we critically review NF-κB as a potential target for the development of anti-inflammatory drugs with an emphasis on drug repurposing as a strategy to identify new approaches to treat inflammatory diseases. Abstract NF-κB is a central mediator of inflammation, response to DNA damage and oxidative stress. As a result of its central role in so many important cellular processes, NF-κB dysregulation has been implicated in the pathology of important human diseases. NF-κB activation causes inappropriate inflammatory responses in diseases including rheumatoid arthritis (RA) and multiple sclerosis (MS). Thus, modulation of NF-κB signaling is being widely investigated as an approach to treat chronic inflammatory diseases, autoimmunity and cancer. The emergence of COVID-19 in late 2019, the subsequent pandemic and the huge clinical burden of patients with life-threatening SARS-CoV-2 pneumonia led to a massive scramble to repurpose existing medicines to treat lung inflammation in a wide range of healthcare systems. These efforts continue and have proven to be controversial. Drug repurposing strategies are a promising alternative to de novo drug development, as they minimize drug development timelines and reduce the risk of failure due to unexpected side effects. Different experimental approaches have been applied to identify existing medicines which inhibit NF-κB that could be repurposed as anti-inflammatory drugs.
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17
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Wang Y, Pleasure D, Deng W, Guo F. Therapeutic Potentials of Poly (ADP-Ribose) Polymerase 1 (PARP1) Inhibition in Multiple Sclerosis and Animal Models: Concept Revisiting. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2102853. [PMID: 34935305 PMCID: PMC8844485 DOI: 10.1002/advs.202102853] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2021] [Revised: 10/12/2021] [Indexed: 05/05/2023]
Abstract
Poly (ADP-ribose) polymerase 1 (PARP1) plays a fundamental role in DNA repair and gene expression. Excessive PARP1 hyperactivation, however, has been associated with cell death. PARP1 and/or its activity are dysregulated in the immune and central nervous system of multiple sclerosis (MS) patients and animal models. Pharmacological PARP1 inhibition is shown to be protective against immune activation and disease severity in MS animal models while genetic PARP1 deficiency studies reported discrepant results. The inconsistency suggests that the function of PARP1 and PARP1-mediated PARylation may be complex and context-dependent. The article reviews PARP1 functions, discusses experimental findings and possible interpretations of PARP1 in inflammation, neuronal/axonal degeneration, and oligodendrogliopathy, three major pathological components cooperatively determining MS disease course and neurological progression, and points out future research directions. Cell type specific PARP1 manipulations are necessary for revisiting the role of PARP1 in the three pathological components prior to moving PARP1 inhibition into clinical trials for MS therapy.
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Affiliation(s)
- Yan Wang
- Department of NeurologySchool of MedicineUniversity of CaliforniaDavisCA95817USA
- Institute for Pediatric Regenerative MedicineUC Davis School of Medicine/Shriners Hospitals for ChildrenSacramentoCAUSA
| | - David Pleasure
- Department of NeurologySchool of MedicineUniversity of CaliforniaDavisCA95817USA
- Institute for Pediatric Regenerative MedicineUC Davis School of Medicine/Shriners Hospitals for ChildrenSacramentoCAUSA
| | - Wenbin Deng
- School of Pharmaceutical Sciences (Shenzhen)Sun Yat‐sen UniversityGuangzhou510006China
| | - Fuzheng Guo
- Department of NeurologySchool of MedicineUniversity of CaliforniaDavisCA95817USA
- Institute for Pediatric Regenerative MedicineUC Davis School of Medicine/Shriners Hospitals for ChildrenSacramentoCAUSA
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18
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Rupnik M, Baker D, Selwood DL. Oligodendrocytes, BK channels and the preservation of myelin. F1000Res 2021; 10:781. [PMID: 34909188 PMCID: PMC8596180 DOI: 10.12688/f1000research.53422.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/02/2021] [Indexed: 11/20/2022] Open
Abstract
Oligodendrocytes wrap multiple lamellae of their membrane, myelin, around axons of the central nervous system (CNS), to improve impulse conduction. Myelin synthesis is specialised and dynamic, responsive to local neuronal excitation. Subtle pathological insults are sufficient to cause significant neuronal metabolic impairment, so myelin preservation is necessary to safeguard neural networks. Multiple sclerosis (MS) is the most prevalent demyelinating disease of the CNS. In MS, inflammatory attacks against myelin, proposed to be autoimmune, cause myelin decay and oligodendrocyte loss, leaving neurons vulnerable. Current therapies target the prominent neuroinflammation but are mostly ineffective in protecting from neurodegeneration and the progressive neurological disability. People with MS have substantially higher levels of extracellular glutamate, the main excitatory neurotransmitter. This impairs cellular homeostasis to cause excitotoxic stress. Large conductance Ca2 +-activated K + channels (BK channels) could preserve myelin or allow its recovery by protecting cells from the resulting excessive excitability. This review evaluates the role of excitotoxic stress, myelination and BK channels in MS pathology, and explores the hypothesis that BK channel activation could be a therapeutic strategy to protect oligodendrocytes from excitotoxic stress in MS. This could reduce progression of neurological disability if used in parallel to immunomodulatory therapies.
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Affiliation(s)
- Maddalena Rupnik
- Wolfson Insitute for Biomedical Research, University College London, London, WC1E 6BT, UK
| | - David Baker
- Centre for Neuroscience and Trauma, Blizard Institute, Queen Mary University of London, London, WC1E 6BT, UK
| | - David L. Selwood
- Wolfson Insitute for Biomedical Research, University College London, London, WC1E 6BT, UK
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19
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Mockenhaupt K, Gonsiewski A, Kordula T. RelB and Neuroinflammation. Cells 2021; 10:1609. [PMID: 34198987 PMCID: PMC8307460 DOI: 10.3390/cells10071609] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 06/23/2021] [Accepted: 06/23/2021] [Indexed: 12/12/2022] Open
Abstract
Neuroinflammation within the central nervous system involves multiple cell types that coordinate their responses by secreting and responding to a plethora of inflammatory mediators. These factors activate multiple signaling cascades to orchestrate initial inflammatory response and subsequent resolution. Activation of NF-κB pathways in several cell types is critical during neuroinflammation. In contrast to the well-studied role of p65 NF-κB during neuroinflammation, the mechanisms of RelB activation in specific cell types and its roles during neuroinflammatory response are less understood. In this review, we summarize the mechanisms of RelB activation in specific cell types of the CNS and the specialized effects this transcription factor exerts during neuroinflammation.
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Affiliation(s)
| | | | - Tomasz Kordula
- Department of Biochemistry and Molecular Biology, School of Medicine and the Massey Cancer Center, Virginia Commonwealth University, Richmond, VI 23298, USA; (K.M.); (A.G.)
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20
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Behrangi N, Lorenz P, Kipp M. Oligodendrocyte Lineage Marker Expression in eGFP-GFAP Transgenic Mice. J Mol Neurosci 2020; 71:2237-2248. [PMID: 33346907 PMCID: PMC8585802 DOI: 10.1007/s12031-020-01771-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 12/02/2020] [Indexed: 12/21/2022]
Abstract
Oligodendrocytes, the myelinating cells of the central nervous system, orchestrate several key cellular functions in the brain and spinal cord, including axon insulation, energy transfer to neurons, and, eventually, modulation of immune responses. There is growing interest for obtaining reliable markers that can specifically label oligodendroglia and their progeny. In many studies, anti-CC1 antibodies, presumably recognizing the protein adenomatous polyposis coli (APC), are used to label mature, myelinating oligodendrocytes. However, it has been discussed whether anti-CC1 antibodies could recognize as well, under pathological conditions, other cell populations, particularly astrocytes. In this study, we used transgenic mice in which astrocytes are labeled by the enhanced green fluorescent protein (eGFP) under the control of the human glial fibrillary acidic protein (GFAP) promoter. By detailed co-localization studies we were able to demonstrate that a significant proportion of eGFP-expressing cells co-express markers of the oligodendrocyte lineage, such as the transcription factor Oligodendrocyte Transcription Factor 2 (OLIG2); the NG2 proteoglycan, also known as chrondroitin sulfate proteoglycan 4 (CSPG4); or APC. The current finding that the GFAP promoter drives transgene expression in cells of the oligodendrocyte lineage should be considered when interpreting results from co-localization studies.
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Affiliation(s)
- Newshan Behrangi
- Institute of Anatomy, Rostock University Medical Center, 18057, Rostock, Germany.,Department of Anatomy II, Ludwig-Maximilians-University of Munich, 80336, Munich, Germany
| | - Peter Lorenz
- Institute of Immunology, Rostock University Medical Center, 18057, Rostock, Germany
| | - Markus Kipp
- Institute of Anatomy, Rostock University Medical Center, 18057, Rostock, Germany. .,Center for Transdisciplinary Neurosciences Rostock (CTNR), Rostock University Medical Center, Gelsheimer Strasse 20, 18147, Rostock, Germany.
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21
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Jeon YM, Kwon Y, Jo M, Lee S, Kim S, Kim HJ. The Role of Glial Mitochondria in α-Synuclein Toxicity. Front Cell Dev Biol 2020; 8:548283. [PMID: 33262983 PMCID: PMC7686475 DOI: 10.3389/fcell.2020.548283] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 10/20/2020] [Indexed: 12/18/2022] Open
Abstract
The abnormal accumulation of alpha-synuclein (α-syn) aggregates in neurons and glial cells is widely known to be associated with many neurodegenerative diseases, including Parkinson’s disease (PD), Dementia with Lewy bodies (DLB), and Multiple system atrophy (MSA). Mitochondrial dysfunction in neurons and glia is known as a key feature of α-syn toxicity. Studies aimed at understanding α-syn-induced toxicity and its role in neurodegenerative diseases have primarily focused on neurons. However, a growing body of evidence demonstrates that glial cells such as microglia and astrocytes have been implicated in the initial pathogenesis and the progression of α-Synucleinopathy. Glial cells are important for supporting neuronal survival, synaptic functions, and local immunity. Furthermore, recent studies highlight the role of mitochondrial metabolism in the normal function of glial cells. In this work, we review the complex relationship between glial mitochondria and α-syn-mediated neurodegeneration, which may provide novel insights into the roles of glial cells in α-syn-associated neurodegenerative diseases.
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Affiliation(s)
- Yu-Mi Jeon
- Dementia Research Group, Korea Brain Research Institute, Daegu, South Korea
| | - Younghwi Kwon
- Dementia Research Group, Korea Brain Research Institute, Daegu, South Korea.,Department of Brain and Cognitive Sciences, DGIST, Daegu, South Korea
| | - Myungjin Jo
- Dementia Research Group, Korea Brain Research Institute, Daegu, South Korea
| | - Shinrye Lee
- Dementia Research Group, Korea Brain Research Institute, Daegu, South Korea
| | - Seyeon Kim
- Dementia Research Group, Korea Brain Research Institute, Daegu, South Korea.,Department of Brain and Cognitive Sciences, DGIST, Daegu, South Korea
| | - Hyung-Jun Kim
- Dementia Research Group, Korea Brain Research Institute, Daegu, South Korea
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22
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The Integrated UPR and ERAD in Oligodendrocytes Maintain Myelin Thickness in Adults by Regulating Myelin Protein Translation. J Neurosci 2020; 40:8214-8232. [PMID: 32958569 DOI: 10.1523/jneurosci.0604-20.2020] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 08/09/2020] [Accepted: 09/10/2020] [Indexed: 12/12/2022] Open
Abstract
Myelin proteins, which are produced in the endoplasmic reticulum (ER), are essential and necessary for maintaining myelin structure. The integrated unfold protein response (UPR) and ER-associated degradation (ERAD) are the primary ER quality control mechanism. The adaptor protein Sel1L (Suppressor/Enhancer of Lin-12-like) controls the stability of the E3 ubiquitin ligase Hrd1 (hydroxymethylglutaryl reductase degradation protein 1), and is necessary for the ERAD activity of the Sel1L-Hrd1 complex. Herein, we showed that Sel1L deficiency specifically in oligodendrocytes caused ERAD impairment, the UPR activation, and attenuation of myelin protein biosynthesis; and resulted in late-onset, progressive myelin thinning in the CNS of adult mice (both male and female). The pancreatic ER kinase (PERK) branch of the UPR functions as the master regulator of protein translation in ER-stressed cells. Importantly, PERK inactivation reversed attenuation of myelin protein biosynthesis in oligodendrocytes and restored myelin thickness in the CNS of oligodendrocyte-specific Sel1L-deficient mice (both male and female). Conversely, blockage of proteolipid protein production exacerbated myelin thinning in the CNS of oligodendrocyte-specific Sel1L-deficient mice (both male and female). These findings suggest that impaired ERAD in oligodendrocytes reduces myelin thickness in the adult CNS through suppression of myelin protein translation by activating PERK.SIGNIFICANCE STATEMENT Myelin is an enormous extended plasma membrane of oligodendrocytes that wraps and insulates axons. Myelin structure, including thickness, was thought to be extraordinarily stable in adults. Myelin proteins, which are produced in the endoplasmic reticulum (ER), are essential and necessary for maintaining myelin structure. The integrated unfolded protein response (UPR) and ER-associated degradation (ERAD) are the primary mechanism that maintains ER protein homeostasis. Herein, we explored the role of the integrated UPR and ERAD in oligodendrocytes in regulating myelin protein production and maintaining myelin structure using mouse models. The results presented in this study imply that the integrated UPR and ERAD in oligodendrocytes maintain myelin thickness in adults by regulating myelin protein production.
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Wu S, Stone S, Yue Y, Lin W. Endoplasmic reticulum associated degradation is required for maintaining endoplasmic reticulum homeostasis and viability of mature Schwann cells in adults. Glia 2020; 69:489-506. [PMID: 32935902 DOI: 10.1002/glia.23910] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 08/26/2020] [Accepted: 08/30/2020] [Indexed: 01/11/2023]
Abstract
The integrated unfolded protein response (UPR) and endoplasmic reticulum associated degradation (ERAD) is the principle mechanisms that maintain endoplasmic reticulum (ER) homeostasis. Schwann cells (SCs) must produce an enormous amount of myelin proteins via the ER to assemble and maintain myelin structure; however, it is unclear how SCs maintain ER homeostasis. It is known that Suppressor/Enhancer of Lin-12-like (Sel1L) is necessary for the ERAD activity of the Sel1L- hydroxymethylglutaryl reductase degradation protein 1(Hrd1) complex. Herein, we showed that Sel1L deficiency in SCs impaired the ERAD activity of the Sel1L-Hrd1 complex and led to ER stress and activation of the UPR. Interestingly, Sel1L deficiency had no effect on actively myelinating SCs during development, but led to later-onset mature SC apoptosis and demyelination in the adult PNS. Moreover, inactivation of the pancreatic ER kinase (PERK) branch of the UPR did not influence the viability and function of actively myelinating SCs, but resulted in exacerbation of ER stress and apoptosis of mature SCs in SC-specific Sel1L deficient mice. These findings suggest that the integrated UPR and ERAD is dispensable to actively myelinating SCs during development, but is necessary for maintaining ER homeostasis and the viability and function of mature SCs in adults.
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Affiliation(s)
- Shuangchan Wu
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Sarrabeth Stone
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yuan Yue
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Wensheng Lin
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
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Functional variations of NFKB1 and NFKB1A in inflammatory disorders and their implication for therapeutic approaches. ASIAN BIOMED 2020. [DOI: 10.1515/abm-2020-0008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Abstract
Nuclear factor κ-light-chain-enhancer of activated B cells (NF-κB) is a sophisticated transcription factor that is particularly important in the inflammatory response, but it regulates more than 400 individual and dependent genes for parts of the apoptotic, angiogenic, and proliferative, differentiative, and cell adhesion pathways. NF-κB function is directly inhibited by the binding of inhibitor of κB (IκB), and the imbalance between NF-κB and IκB has been linked to the development and progression of cancer and a variety of inflammatory disorders. These observations might broaden the horizon of current knowledge, particularly on the pathogenesis of inflammatory diseases considering the roles of NF-κB and IκB. In this context, we focus this narrative review on a comparative discussion of our findings with other literature regarding variations of NFKB1 and NFKB1A and their association with susceptibility to widespread inflammatory disorders (such as atherosclerosis, morbid obesity, Behçet syndrome, Graves disease, Hashimoto disease) and common cancers (such as gliomas).
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NF-κB Activation Accounts for the Cytoprotective Effects of PERK Activation on Oligodendrocytes during EAE. J Neurosci 2020; 40:6444-6456. [PMID: 32661025 DOI: 10.1523/jneurosci.1156-20.2020] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Revised: 06/22/2020] [Accepted: 06/30/2020] [Indexed: 01/09/2023] Open
Abstract
Previous studies demonstrate that activation of pancreatic ER kinase (PERK) protects oligodendrocytes against inflammation in the experimental autoimmune encephalomyelitis (EAE) model of multiple sclerosis (MS). Interestingly, data indicate that the cytoprotective effects of PERK activation on oligodendrocytes during EAE are not mediated by activating transcription factor 4 (ATF4) but are accompanied by activation of nuclear factor κB (NF-κB). NF-κB plays a critical role in MS and EAE; however, the effects of NF-κB activation on oligodendrocytes in these diseases remain elusive. Herein, we generated a mouse model that allow for activation of NF-κB specifically in oligodendrocytes and found that enhanced NF-κB activation in oligodendrocytes had a minimal effect on their viability and function under normal conditions (both male and female mice). Interestingly, we found that enhanced NF-κB activation in oligodendrocytes attenuated EAE disease severity and ameliorated EAE-induced oligodendrocyte loss, demyelination, and axon degeneration, without affecting inflammation (female mice). Moreover, we showed that the detrimental effects of PERK inactivation in oligodendrocytes in EAE were accompanied by impaired NF-κB activation in oligodendrocytes, and were completely rescued by enhanced NF-κB activation in oligodendrocytes (female mice). These findings suggest that NF-κB activation accounts for the cytoprotective effects of PERK activation on oligodendrocytes in MS and EAE.SIGNIFICANCE STATEMENT Nuclear factor κB (NF-κB) is activated in oligodendrocytes in multiple sclerosis (MS) and its animal model experimental autoimmune encephalomyelitis (EAE); however, the role of NF-κB activation in oligodendrocytes in MS and EAE remains elusive. Herein, we generated a mouse model that allows for activation of NF-κB selectively in oligodendrocytes and demonstrated that NF-κB activation prevented oligodendrocyte death and myelin damage in the EAE model. We further demonstrated that NF-κB activation contributed to the protective effects of pancreatic ER kinase (PERK) activation on oligodendrocytes in the EAE model. As such, this work will facilitate the development of new treatments that enhance oligodendrocyte survival in MS patients by targeting the PERK-NF-κB pathway.
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Varas R, Ortiz FC. Neuroinflammation in Demyelinating Diseases: Oxidative Stress as a Modulator of Glial Cross-Talk. Curr Pharm Des 2020; 25:4755-4762. [PMID: 31840603 DOI: 10.2174/1381612825666191216125725] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Accepted: 12/12/2019] [Indexed: 02/05/2023]
Abstract
Myelin is a specialized membrane allowing for saltatory conduction of action potentials in neurons, an essential process to achieve the normal communication across the nervous system. Accordingly, in diseases characterized by the loss of myelin and myelin forming cells -oligodendrocytes in the CNS-, patients show severe neurological disabilities. After a demyelinated insult, microglia, astrocytes and oligodendrocyte precursor cells invade the lesioned area initiating a spontaneous process of myelin repair (i.e. remyelination). A preserved hallmark of this neuroinflammatory scenario is a local increase of oxidative stress, where several cytokines and chemokines are released by glial and other cells. This generates an environment that determines cell interaction resulting in oligodendrocyte maturity and the ability to synthesize new myelin. Herein we review the main features of the regulatory aspect of these molecules based on recent findings and propose new putative signal molecules involved in the remyelination process, focused in the etiology of Multiple Sclerosis, one of the main demyelinating diseases causing disabilities in the population.
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Affiliation(s)
- Rodrigo Varas
- Mechanisms of Myelin Formation and Repair Laboratory, Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago, Chile
| | - Fernando C Ortiz
- Mechanisms of Myelin Formation and Repair Laboratory, Instituto de Ciencias Biomédicas, Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago, Chile
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Zhou Y, Cui C, Ma X, Luo W, Zheng SG, Qiu W. Nuclear Factor κB (NF-κB)-Mediated Inflammation in Multiple Sclerosis. Front Immunol 2020; 11:391. [PMID: 32265906 PMCID: PMC7105607 DOI: 10.3389/fimmu.2020.00391] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Accepted: 02/19/2020] [Indexed: 12/18/2022] Open
Abstract
The nuclear factor κB (NF-κB) signaling cascade has been implicating in a broad range of biological processes, including inflammation, cell proliferation, differentiation, and apoptosis. The past three decades have witnessed a great progress in understanding the impact of aberrant NF-κB regulation on human autoimmune and inflammatory disorders. In this review, we discuss how aberrant NF-κB activation contributes to multiple sclerosis, a typical inflammatory demyelinating disease of the central nervous system, and its involvement in developing potential therapeutic targets.
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Affiliation(s)
- Yifan Zhou
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Chunping Cui
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Xiaoyu Ma
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wenjing Luo
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Song Guo Zheng
- Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, United States
| | - Wei Qiu
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Stone S, Wu S, Nave KA, Lin W. The UPR preserves mature oligodendrocyte viability and function in adults by regulating autophagy of PLP. JCI Insight 2020; 5:132364. [PMID: 32053121 DOI: 10.1172/jci.insight.132364] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 02/06/2020] [Indexed: 01/03/2023] Open
Abstract
Maintaining cellular proteostasis is essential for oligodendrocyte viability and function; however, its underlying mechanisms remain unexplored. Unfolded protein response (UPR), which comprises 3 parallel branches, inositol requiring enzyme 1 (IRE1), pancreatic ER kinase (PERK), and activating transcription factor 6α (ATF6α), is a major mechanism that maintains cellular proteostasis by facilitating protein folding, attenuating protein translation, and enhancing autophagy and ER-associated degradation. Here we report that impaired UPR in oligodendrocytes via deletion of PERK and ATF6α did not affect developmental myelination but caused late-onset mature oligodendrocyte dysfunction and death in young adult mice. The detrimental effects of the impaired UPR on mature oligodendrocytes were accompanied by autophagy impairment and intracellular proteolipid protein (PLP) accumulation and were rescued by PLP deletion. Data indicate that PLP was degraded by autophagy and that intracellular PLP accumulation was cytotoxic to oligodendrocytes. Thus, these findings imply that the UPR is required for maintaining cellular proteostasis and the viability and function of mature oligodendrocytes in adults by regulating autophagy of PLP.
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Affiliation(s)
- Sarrabeth Stone
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Shuangchan Wu
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Klaus-Armin Nave
- Department of Neurogenetics, Max Planck Institute of Experimental Medicine, Göttingen, Germany
| | - Wensheng Lin
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
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Neuroinflammation in CNS diseases: Molecular mechanisms and the therapeutic potential of plant derived bioactive molecules. PHARMANUTRITION 2020. [DOI: 10.1016/j.phanu.2020.100176] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Abstract
Activation of the unfolded protein response in response to endoplasmic reticulum stress preserves cell viability and function under stressful conditions. Nevertheless, persistent, unresolvable activation of the unfolded protein response can trigger apoptosis to eliminate stressed cells. Recent studies show that the unfolded protein response plays an important role in the pathogenesis of various disorders of myelin, including multiples sclerosis, Charcot-Marie-Tooth disease, Pelizaeus-Merzbacher disease, vanishing white matter disease, spinal cord injury, tuberous sclerosis complex, and hypoxia-induced perinatal white matter injury. In this review we summarize the current literature on the unfolded protein response and the evidence for its role in the pathogenesis of myelin disorders.
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Affiliation(s)
- Wensheng Lin
- Department of Neuroscience; Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, USA
| | - Sarrabeth Stone
- Department of Neuroscience; Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, USA
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Gupta AS, Biswas DD, Brown LSN, Mockenhaupt K, Marone M, Hoskins A, Siebenlist U, Kordula T. A detrimental role of RelB in mature oligodendrocytes during experimental acute encephalomyelitis. J Neuroinflammation 2019; 16:161. [PMID: 31362762 PMCID: PMC6664766 DOI: 10.1186/s12974-019-1548-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Accepted: 07/17/2019] [Indexed: 12/31/2022] Open
Abstract
Background Multiple sclerosis (MS) is an autoimmune demyelinating disease of the central nervous system (CNS). It is firmly established that overactivation of the p65 (RelA) nuclear factor kappa B (NF-κB) transcription factor upregulates expression of inflammatory mediators in both immune and non-immune resident CNS cells and promotes inflammation during MS. In contrast to p65, NF-κB family member RelB regulates immune cell development and can limit inflammation. Although RelB expression is induced during inflammation in the CNS, its role in MS remains unknown. Methods To examine the role of RelB in non-immune CNS cells, we generated mice with RelB specifically deleted in astrocytes (RelBΔAST), oligodendrocytes (RelBΔOLIGO), or neural progenitor-derived cells (RelBΔNP). We used experimental autoimmune encephalomyelitis (EAE), an accepted mouse model of MS, to assess the effect of RelB deletion on disease outcomes and performed analysis on the histological, cellular, and molecular level. Results Despite being a negative regulator of inflammation, conditional knockout of RelB in non-immune resident CNS cells surprisingly decreased the severity of EAE. This protective effect was recapitulated by conditional deletion of RelB in oligodendrocytes but not astrocytes. Deletion of RelB in oligodendrocytes reduced disease severity, promoted survival of mature oligodendrocytes, and correlated with increased activation of p65 NF-κB. Conclusions These findings suggest that RelB fine tunes inflammation and cell death/survival during EAE. Importantly, our data points out the detrimental role RelB plays in controlling survival of mature oligodendrocytes, which could be explored as a viable option to treat MS in the future. Electronic supplementary material The online version of this article (10.1186/s12974-019-1548-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Angela S Gupta
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA
| | - Debolina D Biswas
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA
| | - La Shardai N Brown
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA
| | - Karli Mockenhaupt
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA
| | - Michael Marone
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA
| | - Andrew Hoskins
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA
| | - Ulrich Siebenlist
- Laboratory of Molecular Immunology, National Institutes of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, 20892, USA
| | - Tomasz Kordula
- Department of Biochemistry and Molecular Biology, Virginia Commonwealth University, School of Medicine and the Massey Cancer Center, Richmond, VA, 23298, USA.
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Protective Role of NF-κB in Inflammatory Demyelination. J Neurosci 2019; 38:2416-2417. [PMID: 30995609 DOI: 10.1523/jneurosci.3286-17.2018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 01/23/2018] [Accepted: 01/26/2018] [Indexed: 01/21/2023] Open
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Guo S, Liu C, Yu J, Chai Z, Wang Q, Mi X, Song G, Li Y, Yang P, Feng L, Xiao B, Ma C. Nasal delivery of Fasudil-modified immune cells exhibits therapeutic potential in experimental autoimmune encephalomyelitis. CNS Neurosci Ther 2019; 25:783-795. [PMID: 30779332 PMCID: PMC6515703 DOI: 10.1111/cns.13111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 01/21/2019] [Accepted: 01/27/2019] [Indexed: 12/12/2022] Open
Abstract
AIM Multiple sclerosis (MS) is a relapsing-remitting inflammatory demyelinating disease that requires long-term treatment. Although Rho kinase inhibitor Fasudil shows good therapeutic effect in experimental autoimmune encephalomyelitis (EAE), an animal model of MS, certain side effects may limit its clinical use. This study aimed at observing the therapeutic potential of Fasudil-modified encephalitogenic mononuclear cells (MNCs) via nasal delivery in EAE and exploring possible mechanisms of action. METHODS Experimental autoimmune encephalomyelitis was induced with myelin oligodendrocyte glycoprotein 35-55 in C57BL/6 mice, and encephalitogenic MNCs were treated with Fasudil in vitro. Mice received 3 × 106 cells/10 μL per nasal cavity on day 3 and 11 postimmunization, respectively. RESULTS Fasudil-modified MNCs reduced clinical severity of EAE, improved demyelination, and decreased inflammatory cells in spinal cords. Immunohistochemical results indicated that CD4+ T cells and CD68+ macrophages were barely detected in Fasudil-MNCs group. Fasudil-modified MNCs decreased CD4+ IFN-γ+ and CD4+ IL-17+ T cells, increased CD4+ IL-10+ T cells, restrained M1 markers CD16/32, CCR7, IL-12, CD8a, enhanced M2 markers CD206, CD200, CD14 in spleen. Fasudil-modified MNCs inhibited the activation of inflammatory signaling p-NF-kB/P38, accompanied by the decrease of COX-2 and the increase of Arg-1 in spinal cord, as well as the reduction of IL-17, TNF-α, IL-6 and the elevation of IL-10 in cultured supernatant of splenocytes. Fasudil-modified MNCs enhanced the levels of neurotrophic factors BDNF and NT-3 in spinal cord. CONCLUSION Our results indicate that intranasal delivery of Fasudil-modified MNCs have therapeutic potential in EAE, providing a safe and effective cell therapeutic strategy to MS and/or other related disorders.
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MESH Headings
- 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine/analogs & derivatives
- 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine/pharmacology
- Administration, Intranasal
- Animals
- Cell- and Tissue-Based Therapy/methods
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Encephalomyelitis, Autoimmune, Experimental/therapy
- Female
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/transplantation
- Mice, Inbred C57BL
- Myelin-Oligodendrocyte Glycoprotein
- Peptide Fragments
- Protein Kinase Inhibitors/pharmacology
- Spinal Cord/metabolism
- Spinal Cord/pathology
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Affiliation(s)
- Shang‐De Guo
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Chun‐Yun Liu
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Jing‐Wen Yu
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Zhi Chai
- Research Center of NeurobiologyShanxi University of Traditional Chinese MedicineTaiyuanChina
| | - Qing Wang
- Research Center of NeurobiologyShanxi University of Traditional Chinese MedicineTaiyuanChina
| | - Xi‐Ting Mi
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Guo‐Bin Song
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Yan‐Hua Li
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Peng‐Wei Yang
- Research Center of NeurobiologyShanxi University of Traditional Chinese MedicineTaiyuanChina
| | - Ling Feng
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
| | - Bao‐Guo Xiao
- Institute of NeurologyHuashan HospitalInstitutes of Brain Science and State Key Laboratory of Medical NeurobiologyFudan UniversityShanghaiChina
| | - Cun‐Gen Ma
- Department of Neurology, Institute of Brain Science, Medical SchoolShanxi Datong UniversityDatongChina
- Shanxi Key Laboratory of Inflammatory Neurodegenerative Diseases, Institute of Brain ScienceShanxi Datong UniversityDatongChina
- Research Center of NeurobiologyShanxi University of Traditional Chinese MedicineTaiyuanChina
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Zhu J, Zhao Y, Gao Y, Li C, Zhou L, Qi W, Zhang Y, Ye L. Effects of Different Components of PM 2.5 on the Expression Levels of NF-κB Family Gene mRNA and Inflammatory Molecules in Human Macrophage. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E1408. [PMID: 31010106 PMCID: PMC6518365 DOI: 10.3390/ijerph16081408] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 04/14/2019] [Accepted: 04/15/2019] [Indexed: 12/18/2022]
Abstract
Background: Studies have found that exposure to fine particulate matter with sizes below 2.5 µm (PM2.5) might cause inflammation response via the NF-κB pathway. To date, only a few studies have focused on the toxicity of different components of PM2.5. We aimed to explore the effects of PM2.5 with different components on the expression levels of NF-κB family gene mRNA and inflammatory molecules in human macrophages. Methods: Human monocytic cell line THP-1-derived macrophages were exposed to water-soluble (W-PM2.5), fat-soluble (F-PM2.5), and insoluble (I-PM2.5) PM2.5. The cell survival rate was measured by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The levels of inflammatory molecules were determined by enzyme-linked immunosorbent assay (ELISA), and the relative mRNA levels of the NF-κB family gene were determined by real time PCR. Results: PM2.5 could decrease the cell viability. After exposure to W-PM2.5, the levels of interleukins (IL)-1β and IL-12 p70 significantly increased. After exposure to F-PM2.5, the levels of IL-12 p70 significantly increased. The levels of IL-12 p70 and TNF-α after exposure to I-PM2.5 were significantly higher than that in W- and F-PM2.5 treatment groups. The levels of IL-8, C reactive protein (CRP), and cyclooxygenase (COX)-2 increased only after exposure to I-PM2.5. F-PM2.5 increased the mRNA levels of NF-κB genes, especially NF-κB1 and RelA. Conclusions: PM2.5 can decrease the cell survival rate and up-regulate the expression of NF-κB family gene mRNA and inflammatory molecules. The main toxic components of PM2.5 related to inflammatory response in macrophages were the I-PM2.5.
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Affiliation(s)
- Jian Zhu
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
| | - Yaming Zhao
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
| | - Yizhen Gao
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
| | - Chunyan Li
- Clinical Teaching and Research Laboratory, Medical School, Xilingol Vocational College, Inner Mongolia 026000, China.
| | - Liting Zhou
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
| | - Wen Qi
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
| | - Yuezhu Zhang
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
| | - Lin Ye
- Department of Occupational and Environmental Health, School of Public Health, Jilin University, Changchun 130000, China.
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Yue Y, Stanojlovic M, Lin Y, Karsenty G, Lin W. Oligodendrocyte-specific ATF4 inactivation does not influence the development of EAE. J Neuroinflammation 2019; 16:23. [PMID: 30709400 PMCID: PMC6357515 DOI: 10.1186/s12974-019-1415-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 01/24/2019] [Indexed: 01/13/2023] Open
Abstract
Background Multiple sclerosis (MS) and its animal model, experimental autoimmune encephalomyelitis (EAE), are inflammatory demyelinating and neurodegenerative diseases of the CNS. Although recent studies suggest the neuroprotective effects of oligodendrocytes in neurodegenerative diseases, it remains unknown whether oligodendrocyte death induced by inflammatory attacks contributes to neurodegeneration in MS and EAE. Upon endoplasmic reticulum (ER) stress, activation of pancreatic ER kinase (PERK) promotes cell survival through induction of activating transcription factor 4 (ATF4) by phosphorylating eukaryotic translation initiation factor 2α (eIF2α). We have generated a mouse model that allows for temporally controlled activation of PERK specifically in oligodendrocytes. Our previous study has demonstrated that PERK activation specifically in oligodendrocytes attenuates EAE disease severity and ameliorates EAE-induced oligodendrocyte apoptosis, demyelination, and axon degeneration, without altering inflammation. Methods We determined whether oligodendrocyte-specific PERK activation reduced neuron loss in the CNS of EAE mice using the mouse model that allows for temporally controlled activation of PERK specifically in oligodendrocytes. We further generated a mouse model that allows for inactivation of ATF4 specifically in oligodendrocytes, and determined the effects of ATF4 inactivation in oligodendrocytes on mice undergoing EAE. Results We showed that protection of oligodendrocytes resulting from PERK activation led to attenuation of neuron loss in the CNS gray matter of EAE mice. Surprisingly, we found that ATF4 inactivation specifically in oligodendrocytes did not alter EAE disease severity and had no effect on oligodendrocyte loss, demyelination, axon degeneration, neuron loss, and inflammation in EAE mice. Conclusions These findings suggest the neuroprotective effects of PERK activation in oligodendrocytes in EAE, and rule out the involvement of ATF4 in oligodendrocytes in the development of EAE. These results imply that the protective effects of PERK activation in oligodendrocytes in MS and EAE are not mediated by ATF4.
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Affiliation(s)
- Yuan Yue
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Milos Stanojlovic
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Yifeng Lin
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.,Key Laboratory of Birth Defects, Children's Hospital of Fudan University, Shanghai, 201102, China
| | - Gerard Karsenty
- Department of Genetics and Development, Columbia University Medical Center, New York, NY, 10032, USA
| | - Wensheng Lin
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA. .,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, 55455, USA.
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Stone S, Yue Y, Stanojlovic M, Wu S, Karsenty G, Lin W. Neuron-specific PERK inactivation exacerbates neurodegeneration during experimental autoimmune encephalomyelitis. JCI Insight 2019; 4:124232. [PMID: 30674717 DOI: 10.1172/jci.insight.124232] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 12/05/2018] [Indexed: 12/14/2022] Open
Abstract
Multiple sclerosis (MS) and its animal model, experimental autoimmune encephalomyelitis (EAE), are chronic inflammatory demyelinating and neurodegenerative diseases of the CNS. Although neurodegeneration is the major contributor to chronic disability in MS, mechanisms governing the viability of axons and neurons in MS and EAE remain elusive. Data indicate that activation of pancreatic endoplasmic reticulum kinase (PERK) influences, positively or negatively, neuron and axon viability in various neurodegenerative diseases through induction of ATF4. In this study, we demonstrate that the PERK pathway was activated in neurons during EAE. We found that neuron-specific PERK inactivation impaired EAE resolution and exacerbated EAE-induced axon degeneration, neuron loss, and demyelination. Surprisingly, neuron-specific ATF4 inactivation did not alter EAE disease course or EAE-induced axon degeneration, neuron loss, and demyelination. These results suggest that PERK activation in neurons protects axons and neurons against inflammation in MS and EAE through ATF4-independent mechanisms.
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Affiliation(s)
- Sarrabeth Stone
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Yuan Yue
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Milos Stanojlovic
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Shuangchan Wu
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
| | - Gerard Karsenty
- Department of Genetics and Development, Columbia University College of Physicians and Surgeons, New York, New York, USA
| | - Wensheng Lin
- Department of Neuroscience and.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota, USA
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Guo W, Imai S, Yang JL, Zou S, Li H, Xu H, Moudgil KD, Dubner R, Wei F, Ren K. NF-KappaB Pathway Is Involved in Bone Marrow Stromal Cell-Produced Pain Relief. Front Integr Neurosci 2018; 12:49. [PMID: 30459569 PMCID: PMC6232783 DOI: 10.3389/fnint.2018.00049] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Accepted: 09/26/2018] [Indexed: 12/11/2022] Open
Abstract
Bone marrow stromal cells (BMSCs) produce long-lasting attenuation of pain hypersensitivity. This effect involves BMSC's ability to interact with the immune system and activation of the endogenous opioid receptors in the pain modulatory circuitry. The nuclear factor kappa B (NF-κB) protein complex is a key transcription factor that regulates gene expression involved in immunity. We tested the hypothesis that the NF-κB signaling plays a role in BMSC-induced pain relief. We focused on the rostral ventromedial medulla (RVM), a key structure in the descending pain modulatory pathway, that has been shown to play an important role in BMSC-produced antihyperalgesia. In Sprague-Dawley rats with a ligation injury of the masseter muscle tendon (TL), BMSCs (1.5 M/rat) from donor rats were infused i.v. at 1 week post-TL. P65 exhibited predominant neuronal localization in the RVM with scattered distribution in glial cells. At 1 week, but not 8 weeks after BMSC infusion, western blot and immunostaining showed that p65 of NF-κB was significantly increased in the RVM. Given that chemokine signaling is critical to BMSCs' pain-relieving effect, we further evaluated a role of chemokine signaling in p65 upregulation. Prior to infusion of BMSCs, we transduced BMSCs with Ccl4 shRNA, incubated BMSCs with RS 102895, a CCR2b antagonist, or maraviroc, a CCR5 antagonist. The antagonism of chemokines significantly reduced BMSC-induced upregulation of p65, suggesting that upregulation of p65 was related to BMSCs' pain-relieving effect. We then tested the effect of a selective NF-κB activation inhibitor, BAY 11-7082. The mechanical hyperalgesia of the rat was assessed with the von Frey method. In the pre-treatment experiment, BAY 11-7082 (2.5 and 25 pmol) was injected into the RVM at 2 h prior to BMSC infusion. Pretreatment with BAY 11-7082 attenuated BMSCs' antihyperalgesia, but post-treatment at 5 weeks post-BMSC was not effective. On the contrary, in TL rats receiving BAY 11-7082 without BMSCs, TL-induced hyperalgesia was attenuated, consistent with dual roles of NF-κB in pain hypersensitivity and BMSC-produced pain relief. These results indicate that the NF-κB signaling pathway in the descending circuitry is involved in initiation of BMSC-produced behavioral antihyperalgesia.
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Affiliation(s)
- Wei Guo
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States
| | - Satoshi Imai
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States.,Department of Clinical Pharmacology & Therapeutics, Kyoto University Hospital, Kyoto, Japan
| | - Jia-Le Yang
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States
| | - Shiping Zou
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States
| | - Huijuan Li
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States.,Department of Neurology, The 3rd Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Huakun Xu
- Department of Advanced Oral Sciences and Therapeutics, University of Maryland School of Dentistry, Baltimore, MD, United States
| | - Kamal D Moudgil
- Department of Microbiology & Immunology, University of Maryland, Baltimore, MD, United States
| | - Ronald Dubner
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States
| | - Feng Wei
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States
| | - Ke Ren
- Department of Neural and Pain Sciences, School of Dentistry & Program in Neuroscience, University of Maryland, Baltimore, MD, United States
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Stone S, Wu S, Jamison S, Durose W, Pallais JP, Lin W. Activating transcription factor 6α deficiency exacerbates oligodendrocyte death and myelin damage in immune-mediated demyelinating diseases. Glia 2018; 66:1331-1345. [PMID: 29436030 DOI: 10.1002/glia.23307] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 01/16/2018] [Accepted: 01/29/2018] [Indexed: 01/06/2023]
Abstract
Endoplasmic reticulum (ER) stress and the unfolded protein response (UPR) play a critical role in immune-mediated demyelinating diseases, including multiple sclerosis (MS) and its animal model experimental autoimmune encephalomyelitis (EAE), by regulating the viability of oligodendrocytes. Our previous studies show that activation of the PERK branch of the UPR protects myelinating oligodendrocytes against ER stress in young, developing mice that express IFN-γ, a key pro-inflammatory cytokine in MS and EAE, in the CNS. Several studies also demonstrate that PERK activation preserves oligodendrocyte viability and function, protecting mice against EAE. While evidence suggests activation of the ATF6α branch of the UPR in oligodendrocytes under normal and disease conditions, the effects of ATF6α activation on oligodendrocytes in immune-mediated demyelinating diseases remain unknown. Herein, we showed that ATF6α deficiency had no effect on oligodendrocytes under normal conditions. Interestingly, we showed that ATF6α deficiency exacerbated ER stressed-induced myelinating oligodendrocyte death and subsequent myelin loss in the developing CNS of IFN-γ-expressing mice. Moreover, we found that ATF6α deficiency increased EAE severity and aggravated EAE-induced oligodendrocyte loss and demyelination, without affecting inflammation. Thus, these data suggest the protective effects of ATF6α activation on oligodendrocytes in immune-mediated demyelinating diseases.
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Affiliation(s)
- Sarrabeth Stone
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota
| | - Shuangchan Wu
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota
| | - Stephanie Jamison
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota
| | - Wilaiwan Durose
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota
| | - Jean Pierre Pallais
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota
| | - Wensheng Lin
- Department of Neuroscience, University of Minnesota, Minneapolis, Minnesota.,Institute for Translational Neuroscience, University of Minnesota, Minneapolis, Minnesota
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Yue Y, Stone S, Lin W. Role of nuclear factor κB in multiple sclerosis and experimental autoimmune encephalomyelitis. Neural Regen Res 2018; 13:1507-1515. [PMID: 30127103 PMCID: PMC6126134 DOI: 10.4103/1673-5374.237109] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
The transcription factor nuclear factor κB (NF-κB) plays major roles in inflammatory diseases through regulation of inflammation and cell viability. Multiple sclerosis (MS) is a chronic inflammatory demyelinating and neurodegenerative disease of the central nervous system (CNS). It has been shown that NF-κB is activated in multiple cell types in the CNS of MS patients, including T cells, microglia/macrophages, astrocytes, oligodendrocytes, and neurons. Interestingly, data from animal model studies, particularly studies of experimental autoimmune encephalomyelitis, have suggested that NF-κB activation in these individual cell types has distinct effects on the development of MS. In this review, we will cover the current literature on NF-κB and the evidence for its role in the development of MS and its animal model experimental autoimmune encephalomyelitis.
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Affiliation(s)
- Yuan Yue
- Department of Neuroscience; Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, USA
| | - Sarrabeth Stone
- Department of Neuroscience; Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, USA
| | - Wensheng Lin
- Department of Neuroscience; Institute for Translational Neuroscience, University of Minnesota, Minneapolis, MN, USA
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