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Jamann H, Desu HL, Cui QL, Halaweh A, Tastet O, Klement W, Zandee S, Pernin F, Mamane VH, Ouédraogo O, Daigneault A, Sidibé H, Millette F, Peelen E, Dhaeze T, Hoornaert C, Rébillard RM, Thai K, Grasmuck C, Vande Velde C, Prat A, Arbour N, Stratton JA, Antel J, Larochelle C. ALCAM on human oligodendrocytes mediates CD4 T cell adhesion. Brain 2024; 147:147-162. [PMID: 37640028 PMCID: PMC10766241 DOI: 10.1093/brain/awad286] [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: 03/17/2023] [Revised: 07/25/2023] [Accepted: 08/08/2023] [Indexed: 08/31/2023] Open
Abstract
Multiple sclerosis is a chronic neuroinflammatory disorder characterized by demyelination, oligodendrocyte damage/loss and neuroaxonal injury in the context of immune cell infiltration in the CNS. No neuroprotective therapy is available to promote the survival of oligodendrocytes and protect their myelin processes in immune-mediated demyelinating diseases. Pro-inflammatory CD4 Th17 cells can interact with oligodendrocytes in multiple sclerosis and its animal model, causing injury to myelinating processes and cell death through direct contact. However, the molecular mechanisms underlying the close contact and subsequent detrimental interaction of Th17 cells with oligodendrocytes remain unclear. In this study we used single cell RNA sequencing, flow cytometry and immunofluorescence studies on CNS tissue from multiple sclerosis subjects, its animal model and controls to characterize the expression of cell adhesion molecules by mature oligodendrocytes. We found that a significant proportion of human and murine mature oligodendrocytes express melanoma cell adhesion molecule (MCAM) and activated leukocyte cell adhesion molecule (ALCAM) in multiple sclerosis, in experimental autoimmune encephalomyelitis and in controls, although their regulation differs between human and mouse. We observed that exposure to pro-inflammatory cytokines or to human activated T cells are associated with a marked downregulation of the expression of MCAM but not of ALCAM at the surface of human primary oligodendrocytes. Furthermore, we used in vitro live imaging, immunofluorescence and flow cytometry to determine the contribution of these molecules to Th17-polarized cell adhesion and cytotoxicity towards human oligodendrocytes. Silencing and blocking ALCAM but not MCAM limited prolonged interactions between human primary oligodendrocytes and Th17-polarized cells, resulting in decreased adhesion of Th17-polarized cells to oligodendrocytes and conferring significant protection of oligodendrocytic processes. In conclusion, we showed that human oligodendrocytes express MCAM and ALCAM, which are differently modulated by inflammation and T cell contact. We found that ALCAM is a ligand for Th17-polarized cells, contributing to their capacity to adhere and induce damage to human oligodendrocytes, and therefore could represent a relevant target for neuroprotection in multiple sclerosis.
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Affiliation(s)
- Hélène Jamann
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Haritha L Desu
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
| | - Qiao-Ling Cui
- Neuroimmunology Unit, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montreal, H3A 2B4, Canada
| | - Alexandre Halaweh
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Microbiology, Immunology and Infectiology, Université de Montréal, Montreal, H2X 3E4, Canada
| | - Olivier Tastet
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
| | - Wendy Klement
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
| | - Stephanie Zandee
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Florian Pernin
- Neuroimmunology Unit, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montreal, H3A 2B4, Canada
| | - Victoria H Mamane
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Oumarou Ouédraogo
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Microbiology, Immunology and Infectiology, Université de Montréal, Montreal, H2X 3E4, Canada
| | - Audrey Daigneault
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
| | - Hadjara Sidibé
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Florence Millette
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Evelyn Peelen
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Tessa Dhaeze
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Chloé Hoornaert
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Rose-Marie Rébillard
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Karine Thai
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Camille Grasmuck
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Christine Vande Velde
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Alexandre Prat
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Nathalie Arbour
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
| | - Jo Anne Stratton
- Neuroimmunology Unit, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montreal, H3A 2B4, Canada
| | - Jack Antel
- Neuroimmunology Unit, Montreal Neurological Institute and Department of Neurology and Neurosurgery, McGill University, Montreal, H3A 2B4, Canada
| | - Catherine Larochelle
- Neuroimmunology unit, Centre de Recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montreal, H2X 0A9, Canada
- Department of Neurosciences, Université de Montréal, Montreal, H3T 1J4, Canada
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Wang D, Hu B, Xu G, Wei R, Liu Z, Wu H, Xu L, Huang S, Hou J. L1 cell adhesion molecule may be a protective molecule for atrial fibrillation in patients with valvular heart disease. Heliyon 2023; 9:e16831. [PMID: 37303506 PMCID: PMC10248256 DOI: 10.1016/j.heliyon.2023.e16831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 05/24/2023] [Accepted: 05/30/2023] [Indexed: 06/13/2023] Open
Abstract
Background Atrial fibrillation (AF) is the most prevalent sustained arrhythmia. L1 cell adhesion molecule (L1CAM) served as a crucial regulator of signaling pathways. This research sought to examine the clinical value and functions of soluble L1CAM in the serum of AF patients. Methods In total, 118 patients (valvular heart disease patients [VHD, total: n = 93; AF: n = 47; sinus rhythm (SR): n = 46] and healthy controls [n = 25]) were recruited in this retrospective study. Plasma levels of L1CAM were detected by enzyme-linked immunosorbent assays. The Pearson's correlation approach, as applicable, was used for analyzing the correlations. The L1CAM was shown to independently serve as a risk indicator of AF in VHD after being analyzed by the multivariable logistic regression. To examine the specificity and sensitivity of AF, receiver operating characteristic (ROC) curves and the area under the curve (AUC) were used. A nomogram was developed for the visualisation of the model. We further evaluate the prediction model for AF using calibration plot and decision curve analysis. Results The plasma level of L1CAM was substantially decreased in AF patients as opposed to healthy control and SR patients (healthy control = 46.79 ± 12.55 pg/ml, SR = 32.86 ± 6.11 pg/ml, AF = 22.48 ± 5.39 pg/ml; SR vs. AF, P < 0.001; control vs. AF, P < 0.001). L1CAM was significantly and negatively correlated with LA and NT-proBNP (LA: r = -0.344, P = 0.002; NT-proBNP: r = -0.380, P = 0.001). Analyses using logistic regression showed a substantial correlation between L1CAM and AF in patients with VHD (For L1CAM, Model 1: OR = 0.704, 95%CI = 0.607-0.814, P < 0.001; Model 2: OR = 0.650, 95% CI = 0.529-0.798, P < 0.001; Model 3: OR = 0.650, 95% CI = 0.529-0.798, P < 0.001). ROC analysis showed that inclusion of L1CAM in the model significantly improved the ability of other clinical indicators to predict AF. The predictive model including L1CAM, LA, NT-proBNP and LVDd had excellent discrimination and a nomogram was developed. The model had good the calibration and clinical utility. Conclusion L1CAM was shown to independently serve as a risk indicator for AF in VHD. In AF patients with VHD, the prognostic and predictive effectiveness of models incorporating L1CAM was satisfactory. Collectively, L1CAM may be a protective molecule for atrial fibrillation in patients with valvular heart disease.
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Affiliation(s)
- Dayu Wang
- Department of Cardiology, Guangzhou Panyu Central Hospital, Guangzhou 511400, GD, China
| | - Bo Hu
- Department of Pathology and Municipal Key-Innovative Discipline of Molecular Diagnostics, Jiaxing Hospital of Traditional Chinese Medicine, Zhejiang Chinese Medical University, Jiaxing 314001, ZJ, China
| | - Guangtao Xu
- Forensic and Pathology Laboratory, Department of Pathology, Institute of Forensic Science, Jiaxing University, Jiaxing 314001, ZJ, China
| | - Ruibin Wei
- Department of Cardiology, Guangzhou Panyu Central Hospital, Guangzhou 511400, GD, China
| | - Zhen Liu
- Department of Cardiology, Guangzhou Panyu Central Hospital, Guangzhou 511400, GD, China
| | - Huajun Wu
- Department of Cardiology, Guangzhou Panyu Central Hospital, Guangzhou 511400, GD, China
| | - Long Xu
- Forensic and Pathology Laboratory, Department of Pathology, Institute of Forensic Science, Jiaxing University, Jiaxing 314001, ZJ, China
| | - Suiqing Huang
- Department of Cardiac Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, GD, China
| | - Jian Hou
- Department of Cardiac Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510080, GD, China
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Weng D, He L, Chen X, Lin H, Ji D, Lu S, Ao L, Wang S. Integrated analysis of transcription factor-mRNA-miRNA regulatory network related to immune characteristics in medullary thyroid carcinoma. Front Immunol 2023; 13:1055412. [PMID: 36713370 PMCID: PMC9877459 DOI: 10.3389/fimmu.2022.1055412] [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: 09/27/2022] [Accepted: 12/30/2022] [Indexed: 01/15/2023] Open
Abstract
Background Medullary thyroid carcinoma (MTC), a thyroid C cell-derived malignancy, is poorly differentiated and more aggressive than papillary, follicular and oncocytic types of thyroid cancer. The current therapeutic options are limited, with a third of population suffering resistance. The differential gene expression pattern among thyroid cancer subtypes remains unclear. This study intended to explore the exclusive gene profile of MTC and construct a comprehensive regulatory network via integrated analysis, to uncover the potential key biomarkers. Methods Multiple datasets of thyroid and other neuroendocrine tumors were obtained from GEO and TCGA databases. Differentially expressed genes (DEGs) specific in MTC were identified to construct a transcription factor (TF)-mRNA-miRNA network. The impact of the TF-mRNA-miRNA network on tumor immune characteristics and patient survival was further explored by single-sample GSEA (ssGSEA) and ESTIMATE algorithms, as well as univariate combined with multivariate analyses. RT-qPCR, cell viability and apoptosis assays were performed for in vitro validation. Results We identified 81 genes upregulated and 22 downregulated in MTC but not in other types of thyroid tumor compared to the normal thyroid tissue. According to the L1000CDS2 database, potential targeting drugs were found to reverse the expressions of DEGs, with panobinostat (S1030) validated effective for tumor repression in MTC by in vitro experiments. The 103 DEGs exclusively seen in MTC were involved in signal release, muscle contraction, pathways of neurodegeneration diseases, neurotransmitter activity and related amino acid metabolism, and cAMP pathway. Based on the identified 15 hub genes, a TF-mRNA-miRNA linear network, as well as REST-cored coherent feed-forward loop networks, namely REST-KIF5C-miR-223 and REST-CDK5R2-miR-130a were constructed via online prediction and validation by public datasets and our cohort. Hub-gene, TF and miRNA scores in the TF-mRNA-miRNA network were related to immune score, immune cell infiltration and immunotherapeutic molecules in MTC as well as in neuroendocrine tumor of lung and neuroblastoma. Additionally, a high hub-gene score or a low miRNA score indicated good prognoses of neuroendocrine tumors. Conclusion The present study uncovers underlying molecular mechanisms and potential immunotherapy-related targets for the pathogenesis and drug discovery of MTC.
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Affiliation(s)
- Danfeng Weng
- Department of Pathology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Long He
- Department of Pain, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Xiangna Chen
- Department of Pathology, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Huangfeng Lin
- Department of Orthopedics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China
| | - Daihan Ji
- Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Shuting Lu
- Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China
| | - Lu Ao
- Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China,*Correspondence: Shenglin Wang, ; Lu Ao,
| | - Shenglin Wang
- Department of Orthopedics, The First Affiliated Hospital of Fujian Medical University, Fuzhou, China,Department of Bioinformatics, Fujian Key Laboratory of Medical Bioinformatics, School of Medical Technology and Engineering, Fujian Medical University, Fuzhou, China,*Correspondence: Shenglin Wang, ; Lu Ao,
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Liu H, Ai J, Wang T, Tan G. Adhesion Promotes Allergic Rhinitis CD4 +IL4 + T Cell Differentiation via ICAM1 and E-Selectin. Am J Rhinol Allergy 2022; 36:521-528. [PMID: 35296145 DOI: 10.1177/19458924221086061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Neuroimmune communication plays an important role in allergic inflammation, but the neuroimmune regulation of allergic rhinitis remains unclear. OBJECTIVE The goal of this study was to investigate the role of CD4-positive T lymphocyte (CD4+ T cells) adhesion to D-U87 neuron-like cells in mediating allergic rhinitis CD4+ T cell differentiation. METHODS D-U87 neuron-like cells were derived from the human glioblastoma U87 cell line. CD4+ T cells were isolated from human peripheral blood using a magnetic separation technique. In vitro coculture of D-U87 neuron-like cells and CD4+ T cells was established. The number of adherent CD4+ T cells was counted using a fluorescence microscope. The percentages of CD4+IFNγ+ and CD4+IL4+ T cells and the levels of IFNγ and IL4 cytokines in the supernatant were measured by flow cytometry. RESULTS The results showed that the number of adherent CD4+ T cells in patients with allergic rhinitis was significantly higher than that in healthy controls. In allergic rhinitis, the percentage of CD4+IL4+ T cells was significantly increased in the adherent group compared with that in the nonadherent group. Moreover, blocking ICAM1 and E-selectin decreased the number of adherent CD4+ T cells and the percentage of CD4+IL4+ T cells in allergic rhinitis. CONCLUSION Adhesion contributes to CD4+IL4+ T cell differentiation in the in vitro coculture system of D-U87 neuron-like cells and allergic rhinitis CD4+ T cells, which may provide new insights into therapeutic strategies for allergic rhinitis.
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Affiliation(s)
- Honghui Liu
- Department of Otorhinolaryngology - Head Neck Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Jingang Ai
- Department of Otorhinolaryngology - Head Neck Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Tiansheng Wang
- Department of Otorhinolaryngology - Head Neck Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
| | - Guolin Tan
- Department of Otorhinolaryngology - Head Neck Surgery, Third Xiangya Hospital, Central South University, Changsha, Hunan, P.R. China
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Brummer T, Zipp F, Bittner S. T cell-neuron interaction in inflammatory and progressive multiple sclerosis biology. Curr Opin Neurobiol 2022; 75:102588. [PMID: 35732103 DOI: 10.1016/j.conb.2022.102588] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 05/18/2022] [Accepted: 05/18/2022] [Indexed: 11/03/2022]
Abstract
Multiple sclerosis (MS) is a chronic autoimmune condition of the central nervous system (CNS) characterized by acute inflammatory relapses, chronic neuro-axonal degeneration, and subsequent disability progression. T cells - in interaction with B cells and CNS-resident glial cells - are key initiators and drivers of neurodegeneration in MS. However, it is not entirely clear how encephalitogenic T cells orchestrate the local immune response within the brain and how they overtake disease stage-specific roles in MS pathogenesis. This review highlights recent advances in understanding direct and indirect T cell-neuron interactions in inflammatory and progressive MS. Finally, we discuss new diagnostic tools such as neurofilament light chain (NfL), which is on the cusp of becoming a key factor in clinical and therapeutic decision-making.
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Affiliation(s)
- Tobias Brummer
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn(2)), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Frauke Zipp
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn(2)), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Stefan Bittner
- Department of Neurology, Focus Program Translational Neuroscience (FTN) and Immunotherapy (FZI), Rhine Main Neuroscience Network (rmn(2)), University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany.
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Trobisch T, Zulji A, Stevens NA, Schwarz S, Wischnewski S, Öztürk M, Perales-Patón J, Haeussler M, Saez-Rodriguez J, Velmeshev D, Schirmer L. Cross-regional homeostatic and reactive glial signatures in multiple sclerosis. Acta Neuropathol 2022; 144:987-1003. [PMID: 36112223 PMCID: PMC9547805 DOI: 10.1007/s00401-022-02497-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 09/08/2022] [Accepted: 09/08/2022] [Indexed: 01/26/2023]
Abstract
Multiple sclerosis (MS) is a multifocal and progressive inflammatory disease of the central nervous system (CNS). However, the compartmentalized pathology of the disease affecting various anatomical regions including gray and white matter and lack of appropriate disease models impede understanding of the disease. Utilizing single-nucleus RNA-sequencing and multiplex spatial RNA mapping, we generated an integrated transcriptomic map comprising leukocortical, cerebellar and spinal cord areas in normal and MS tissues that captures regional subtype diversity of various cell types with an emphasis on astrocytes and oligodendrocytes. While we found strong cross-regional diversity among glial subtypes in control tissue, regional signatures become more obscure in MS. This suggests that patterns of transcriptomic changes in MS are shared across regions and converge on specific pathways, especially those regulating cellular stress and immune activation. In addition, we found evidence that a subtype of white matter oligodendrocytes appearing across all three CNS regions adopt pro-remyelinating gene signatures in MS. In summary, our data suggest that cross-regional transcriptomic glial signatures overlap in MS, with different reactive glial cell types capable of either exacerbating or ameliorating pathology.
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Affiliation(s)
- Tim Trobisch
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Amel Zulji
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Nikolas A. Stevens
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany ,Institute for Physiology and Pathophysiology, Heidelberg University, Heidelberg, Germany
| | - Sophia Schwarz
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Sven Wischnewski
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Mikail Öztürk
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Javier Perales-Patón
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University and Heidelberg University Hospital, BioQuant, Heidelberg, Germany
| | | | - Julio Saez-Rodriguez
- Institute for Computational Biomedicine, Faculty of Medicine, Heidelberg University and Heidelberg University Hospital, BioQuant, Heidelberg, Germany
| | - Dmitry Velmeshev
- Department of Neurology, University of California, San Francisco, San Francisco, CA USA ,Eli and Edythe Broad Center of Regeneration Medicine and Stem Cell Research, University of California, San Francisco, San Francisco, CA USA ,Department of Neurobiology, Duke University School of Medicine, Durham, NC USA
| | - Lucas Schirmer
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. .,Mannheim Center for Translational Neuroscience and Institute for Innate Immunoscience, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany. .,Interdisciplinary Center for Neurosciences, Heidelberg University, Heidelberg, Germany.
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Han Y, Wang X, Cheng X, Zhao M, Zhao T, Guo L, Liu D, Wu K, Fan M, Shi M, Zhu L. Close Homolog of L1 Deficiency Exacerbated Intestinal Epithelial Barrier Function in Mouse Model of Dextran Sulfate Sodium-Induced Colitis. Front Physiol 2020; 11:584508. [PMID: 33240104 PMCID: PMC7677258 DOI: 10.3389/fphys.2020.584508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/12/2020] [Indexed: 12/02/2022] Open
Abstract
The cell adhesion molecule CHL1, which belongs to the immunoglobulin superfamily, functions in a variety of physiological and pathological processes, including neural development, tissue injury, and repair. We previously found that the loss of CHL1 exacerbated the dextran sulfate sodium (DSS)-induced colitis in mice. In the present study, we further addressed the role of CHL1 in mouse model of DSS-induced colitis and its’ potential mechanism. Colon tissues were collected from CHL1+/+, CHL1+/−, and CHL1−/− mice after DSS induction to investigate the effects of CHL1 on the development of colitis. The data showed that CHL1 was expressed in intestine tissue, and expression of CHL1 was increased by DSS-induced inflammation. CHL1 deficiency induced more pronounced colitis features, exacerbated inflammation, and damage to colonic tissues in DSS-induced mice. Moreover, colonic tissues of CHL1−/− mice showed a marked increase in neutrophil and macrophage infiltration, be accompanied by more severe damage to intestinal epithelial cells and higher fluorescein isothiocyanate (FITC) leakage. Our results revealed deficiency of CHL1 exacerbated DSS-induced colitis, and this pathogenesis was potentially mediated by disruption of intestinal barrier integrity, indicating that CHL1 may be an attractive therapeutic target for inflammatory bowel diseases (IBDs) in mice.
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Affiliation(s)
- Ying Han
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China.,Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Xiaomeng Wang
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Xiang Cheng
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Ming Zhao
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Tong Zhao
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Liang Guo
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Dan Liu
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Kuiwu Wu
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Ming Fan
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain Disorders, Capital Medical University, Beijing, China.,Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China
| | - Ming Shi
- Jiangsu Center for the Collaboration and Innovation of Cancer Biotherapy, Cancer Institute, Xuzhou Medical University, Xuzhou, China
| | - Lingling Zhu
- Institute of Military Cognition and Brain Sciences, Academy of Military Medical Sciences, Beijing, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
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Gupta M, Kaur G. Withania somnifera (L.) Dunal ameliorates neurodegeneration and cognitive impairments associated with systemic inflammation. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2019; 19:217. [PMID: 31416451 PMCID: PMC6694620 DOI: 10.1186/s12906-019-2635-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 08/08/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND Systemic inflammation driven neuroinflammation is an event which correlates with pathogenesis of several neurodegenerative diseases. Therefore, targeting peripheral and central inflammation simultaneously could be a promising approach for the management of these diseases. Nowadays, herbal medicines are emerging as potent therapeutics against various brain pathologies. Therefore, in this contemporary study, the neuroprotective activity of Ashwagandha (Withania somnifera) was elucidated against the inflammation associated neurodegeneration and cognitive impairments induced by systemic LPS administration using in vivo rat model system. METHODS To achieve this aim, young adult wistar strain male albino rats were randomized into four groups: (i) Control, (ii) LPS alone, (iii) LPS + ASH-WEX, (iv) ASH-WEX alone. Post regimen, the animals were subjected to Rotarod, Narrow Beam Walking and Novel Object Recognition test to analyze their neuromuscular coordination, working memory and learning functions. The rats were then sacrificed to isolate the brain regions and expression of proteins associated with synaptic plasticity and cell survival was studied using Western blotting and Quantitative real time PCR. Further, neuroprotective potential of ASH-WEX and its active fraction (FIV) against inflammatory neurodegeneration was studied and validated using in vitro model system of microglial conditioned medium-treated neuronal cultures and microglial-neuronal co-cultures. RESULTS Orally administered ASH-WEX significantly suppressed the cognitive and motor-coordination impairments in rats. On the molecular basis, ASH-WEX supplementation also regulated the expression of various proteins involved in synaptic plasticity and neuronal cell survival. Since microglial-neuronal crosstalk is crucial for maintaining CNS homeostasis, the current study was further extended to ascertain whether LPS-mediated microglial activation caused damage to neurons via direct cell to cell contact or through secretion of inflammatory mediators. ASH-WEX and FIV pretreatment was found to restore neurite outgrowth and protect neurons from apoptotic cell death caused by LPS-induced neuroinflammation in both activated microglial conditioned medium-treated neuronal cultures as well as microglial-neuronal co-cultures. CONCLUSION This extensive study using in vivo and in vitro model systems provides first ever pre-clinical evidence that ASH-WEX can be used as a promising natural therapeutic remedial for the prevention of neurodegeneration and cognitive impairments associated with peripheral inflammation and neuroinflammation.
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Affiliation(s)
- Muskan Gupta
- Department of Biotechnology, Medical Biotechnology Laboratory, Guru Nanak Dev University, Amritsar, Amritsar, Punjab 143005 India
| | - Gurcharan Kaur
- Department of Biotechnology, Medical Biotechnology Laboratory, Guru Nanak Dev University, Amritsar, Amritsar, Punjab 143005 India
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Krämer TJ, Hack N, Brühl TJ, Menzel L, Hummel R, Griemert EV, Klein M, Thal SC, Bopp T, Schäfer MKE. Depletion of regulatory T cells increases T cell brain infiltration, reactive astrogliosis, and interferon-γ gene expression in acute experimental traumatic brain injury. J Neuroinflammation 2019; 16:163. [PMID: 31383034 PMCID: PMC6683516 DOI: 10.1186/s12974-019-1550-0] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2019] [Accepted: 07/22/2019] [Indexed: 12/20/2022] Open
Abstract
Background Traumatic brain injury (TBI) is a major cause of death and disability. T cells were shown to infiltrate the brain during the first days after injury and to exacerbate tissue damage. The objective of this study was to investigate the hitherto unresolved role of immunosuppressive, regulatory T cells (Tregs) in experimental TBI. Methods “Depletion of regulatory T cell” (DEREG) and wild type (WT) C57Bl/6 mice, treated with diphtheria toxin (DTx) to deplete Tregs or to serve as control, were subjected to the controlled cortical impact (CCI) model of TBI. Neurological and motor deficits were examined until 5 days post-injury (dpi). At the 5 dpi endpoint, (immuno-) histological, protein, and gene expression analyses were carried out to evaluate the consequences of Tregs depletion. Comparison of parametric or non-parametric data between two groups was done using Student’s t test or the Mann-Whitney U test. For multiple comparisons, p values were calculated by one-way or two-way ANOVA followed by specific post hoc tests. Results The overall neurological outcome at 5 dpi was not different between DEREG and WT mice but more severe motor deficits occurred transiently at 1 dpi in DEREG mice. DEREG and WT mice did not differ in the extent of brain damage, blood-brain barrier (BBB) disruption, or neuronal excitotoxicity, as examined by lesion volumetry, immunoglobulin G (IgG) extravasation, or calpain-generated αII-spectrin breakdown products (SBDPs), respectively. In contrast, increased protein levels of glial fibrillary acidic protein (GFAP) and GFAP+ astrocytes in the ipsilesional brain tissue indicated exaggerated reactive astrogliosis in DEREG mice. T cell counts following anti-CD3 immunohistochemistry and gene expression analyses of Cd247 (CD3 subunit zeta) and Cd8a (CD8a) further indicated an increased number of T cells infiltrating the brain injury sites of DEREG mice compared to WT. These changes coincided with increased gene expression of pro-inflammatory interferon-γ (Ifng) in DEREG mice compared to WT in the injured brain. Conclusions The results show that the depletion of Tregs attenuates T cell brain infiltration, reactive astrogliosis, interferon-γ gene expression, and transiently motor deficits in murine acute traumatic brain injury.
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Affiliation(s)
- Tobias J Krämer
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany
| | - Nathalia Hack
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany
| | - Till J Brühl
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany
| | - Lutz Menzel
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany
| | - Regina Hummel
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany
| | - Eva-Verena Griemert
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany
| | - Matthias Klein
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany.,Research Center for Immunotherapy (FZI), Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Serge C Thal
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany
| | - Tobias Bopp
- Institute for Immunology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstrasse 1, 55131, Mainz, Germany.,Research Center for Immunotherapy (FZI), Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Michael K E Schäfer
- Department of Anesthesiology, University Medical Center of the Johannes Gutenberg-University Mainz, Langenbeckstr. 1 (Bld. 505), 55131, Mainz, Germany. .,Research Center for Immunotherapy (FZI), Johannes Gutenberg-University Mainz, Mainz, Germany. .,Focus Program Translational Neurosciences (FTN), Johannes Gutenberg-University Mainz, Mainz, Germany.
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Zhao W, Tan J, Zhu T, Ou J, Li Y, Shen L, Wu H, Han L, Liu Y, Jia X, Bai T, Li H, Ke X, Zhao J, Zou X, Hu Z, Guo H, Xia K. Rare inherited missense variants of POGZ associate with autism risk and disrupt neuronal development. J Genet Genomics 2019; 46:247-257. [PMID: 31196716 DOI: 10.1016/j.jgg.2019.04.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 03/22/2019] [Accepted: 04/02/2019] [Indexed: 11/16/2022]
Abstract
Excess de novo likely gene-disruptive and missense variants within dozens of genes have been identified in autism spectrum disorder (ASD) and other neurodevelopmental disorders. However, many rare inherited missense variants of these high-risk genes have not been thoroughly evaluated. In this study, we analyzed the rare missense variant burden of POGZ in a large cohort of ASD patients from the Autism Clinical and Genetic Resources in China (ACGC) and further dissected the functional effect of disease-associated missense variants on neuronal development. Our results showed a significant burden of rare missense variants in ASD patients compared to the control population (P = 4.6 × 10-5, OR = 3.96), and missense variants in ASD patients showed more severe predicted functional outcomes than those in controls. Furthermore, by leveraging published large-scale sequencing data of neurodevelopmental disorders (NDDs) and sporadic case reports, we identified 8 de novo missense variants of POGZ in NDD patients. Functional analysis revealed that two inherited, but not de novo, missense variants influenced the cellular localization of POGZ and failed to rescue the defects in neurite and dendritic spine development caused by Pogz knockdown in cultured mouse primary cortical neurons. Significantly, L1CAM, an autism candidate risk gene, is differentially expressed in POGZ deficient cell lines. Reduced expression of L1cam was able to partially rescue the neurite length defects caused by Pogz knockdown. Our study showed the important roles of rare inherited missense variants of POGZ in ASD risk and neuronal development and identified the potential downstream targets of POGZ, which are important for further molecular mechanism studies.
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Affiliation(s)
- Wenjing Zhao
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Jieqiong Tan
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Tengfei Zhu
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Jianjun Ou
- Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Ying Li
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Lu Shen
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Huidan Wu
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Lin Han
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Yanling Liu
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Xiangbin Jia
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Ting Bai
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Honghui Li
- Key Laboratory of Developmental Disorders in Children, Liuzhou Maternity and Child Healthcare Hospital, Liuzhou, 545001, China
| | - Xiaoyan Ke
- Child Mental Health Research Center, Nanjing Brain Hospital Affiliated of Nanjing Medical University, Nanjing, 210029, China
| | - Jingping Zhao
- Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, 410011, China
| | - Xiaobing Zou
- Children Development Behavior Center of the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510630, China
| | - Zhengmao Hu
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China
| | - Hui Guo
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China; Mental Health Institute of the Second Xiangya Hospital, Central South University, Changsha, 410011, China.
| | - Kun Xia
- Center of Medical Genetics & Hunan Key Laboratory of Medical Genetics, School of Life Sciences, Central South University, Changsha, 410078, China; School of Life Sciences and Technology, Xinjiang University, Ürümqi, 830046, China; CAS Center for Excellence in Brain Science and Intelligence Technology (CEBSIT), Chinese Academy of Sciences, Shanghai, 200030, China.
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Ionizing radiation reduces ADAM10 expression in brain microvascular endothelial cells undergoing stress-induced senescence. Aging (Albany NY) 2018; 9:1248-1268. [PMID: 28437250 PMCID: PMC5425125 DOI: 10.18632/aging.101225] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 04/10/2017] [Indexed: 12/15/2022]
Abstract
Cellular senescence is associated with aging and is considered a potential contributor to age-associated neurodegenerative disease. Exposure to ionizing radiation increases the risk of developing premature neurovascular degeneration and dementia but also induces premature senescence. As cells of the cerebrovascular endothelium are particularly susceptible to radiation and play an important role in brain homeostasis, we investigated radiation-induced senescence in brain microvascular endothelial cells (EC). Using biotinylation to label surface proteins, streptavidin enrichment and proteomic analysis, we analyzed the surface proteome of stress-induced senescent EC in culture. An array of both recognized and novel senescence-associated proteins were identified. Most notably, we identified and validated the novel radiation-stimulated down-regulation of the protease, a disintegrin and metalloprotease 10 (ADAM10). ADAM10 is an important modulator of amyloid beta protein production, accumulation of which is central to the pathologies of Alzheimer's disease and cerebral amyloid angiopathy. Concurrently, we identified and validated increased surface expression of ADAM10 proteolytic targets with roles in neural proliferation and survival, inflammation and immune activation (L1CAM, NEO1, NEST, TLR2, DDX58). ADAM10 may be a key molecule linking radiation, senescence and endothelial dysfunction with increased risk of premature neurodegenerative diseases normally associated with aging.
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Li R, Sahu S, Schachner M. Phenelzine, a small organic compound mimicking the functions of cell adhesion molecule L1, promotes functional recovery after mouse spinal cord injury. Restor Neurol Neurosci 2018; 36:469-483. [PMID: 29889084 DOI: 10.3233/rnn-170808] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Neural cell adhesion molecule L1 contributes to nervous system development and maintenance by promoting neuronal survival, neuritogenesis, axonal regrowth/sprouting, myelination, and synapse formation and plasticity. L1 also enhances recovery after spinal cord injury and ameliorates neurodegenerative processes in experimental rodent models. Aiming for clinical translation of L1 into therapy we screened for and functionally characterized in vitro the small organic molecule phenelzine, which mimics characteristic L1 functions. OBJECTIVE The present study was designed to evaluate the potential of this compound in vivo in a mouse model of spinal cord injury. METHODS AND RESULTS In mice, intraperitoneal injection of phenelzine immediately after severe thoracic compression, and thereafter once daily for 6 weeks, improved hind limb function, reduced astrogliosis and promoted axonal regrowth/sprouting at 4 and 5 weeks after spinal cord injury compared to vehicle control-treated mice. Phenelzine application upregulated L1 expression in the spinal cord and stimulated the cognate L1-mediated intracellular signaling cascades in the spinal cord tissue. Phenelzine-treated mice showed decreased levels of pro-inflammatory cytokines, such as interleukin-1β, interleukin-6, and tumor necrosis factor-α in the injured spinal cord during the acute phase of inflammation. CONCLUSIONS This study provides new insights into the role of phenelzine in L1-mediated neural functions and modulation of inflammation. The combined results raise hopes that phenelzine may develop into a therapeutic agent for nervous system injuries.
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Affiliation(s)
- Rong Li
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong, China
| | - Sudhanshu Sahu
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong, China
| | - Melitta Schachner
- Center for Neuroscience, Shantou University Medical College, Shantou, Guangdong, China
- Keck Center for Collaborative Neuroscience and Department of Cell Biology and Neuroscience, Rutgers University, Piscataway, NJ, USA
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Pöttker B, Stöber F, Hummel R, Angenstein F, Radyushkin K, Goldschmidt J, Schäfer MKE. Traumatic brain injury causes long-term behavioral changes related to region-specific increases of cerebral blood flow. Brain Struct Funct 2017; 222:4005-4021. [DOI: 10.1007/s00429-017-1452-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 05/27/2017] [Indexed: 12/19/2022]
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