1
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Zapata-Acevedo JF, Mantilla-Galindo A, Vargas-Sánchez K, González-Reyes RE. Blood-brain barrier biomarkers. Adv Clin Chem 2024; 121:1-88. [PMID: 38797540 DOI: 10.1016/bs.acc.2024.04.004] [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] [Indexed: 05/29/2024]
Abstract
The blood-brain barrier (BBB) is a dynamic interface that regulates the exchange of molecules and cells between the brain parenchyma and the peripheral blood. The BBB is mainly composed of endothelial cells, astrocytes and pericytes. The integrity of this structure is essential for maintaining brain and spinal cord homeostasis and protection from injury or disease. However, in various neurological disorders, such as traumatic brain injury, Alzheimer's disease, and multiple sclerosis, the BBB can become compromised thus allowing passage of molecules and cells in and out of the central nervous system parenchyma. These agents, however, can serve as biomarkers of BBB permeability and neuronal damage, and provide valuable information for diagnosis, prognosis and treatment. Herein, we provide an overview of the BBB and changes due to aging, and summarize current knowledge on biomarkers of BBB disruption and neurodegeneration, including permeability, cellular, molecular and imaging biomarkers. We also discuss the challenges and opportunities for developing a biomarker toolkit that can reliably assess the BBB in physiologic and pathophysiologic states.
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Affiliation(s)
- Juan F Zapata-Acevedo
- Grupo de Investigación en Neurociencias, Centro de Neurociencia Neurovitae-UR, Instituto de Medicina Traslacional, Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
| | - Alejandra Mantilla-Galindo
- Grupo de Investigación en Neurociencias, Centro de Neurociencia Neurovitae-UR, Instituto de Medicina Traslacional, Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
| | - Karina Vargas-Sánchez
- Laboratorio de Neurofisiología Celular, Grupo de Neurociencia Traslacional, Facultad de Medicina, Universidad de los Andes, Bogotá, Colombia
| | - Rodrigo E González-Reyes
- Grupo de Investigación en Neurociencias, Centro de Neurociencia Neurovitae-UR, Instituto de Medicina Traslacional, Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia.
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2
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Junior MSO, Reiche L, Daniele E, Kortebi I, Faiz M, Küry P. Star power: harnessing the reactive astrocyte response to promote remyelination in multiple sclerosis. Neural Regen Res 2024; 19:578-582. [PMID: 37721287 PMCID: PMC10581572 DOI: 10.4103/1673-5374.380879] [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: 01/27/2023] [Revised: 05/05/2023] [Accepted: 05/23/2023] [Indexed: 09/19/2023] Open
Abstract
Astrocytes are indispensable for central nervous system development and homeostasis. In response to injury and disease, astrocytes are integral to the immunological- and the, albeit limited, repair response. In this review, we will examine some of the functions reactive astrocytes play in the context of multiple sclerosis and related animal models. We will consider the heterogeneity or plasticity of astrocytes and the mechanisms by which they promote or mitigate demyelination. Finally, we will discuss a set of biomedical strategies that can stimulate astrocytes in their promyelinating response.
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Affiliation(s)
- Markley Silva Oliveira Junior
- Department of Neurology, Neuroregeneration laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Laura Reiche
- Department of Neurology, Neuroregeneration laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
| | - Emerson Daniele
- Institute of Medical Science, University of Toronto, Toronto, Canada
- Division of Anatomy, Department of Surgery, University of Toronto, Toronto, Canada
| | - Ines Kortebi
- Institute of Medical Science, University of Toronto, Toronto, Canada
- Division of Anatomy, Department of Surgery, University of Toronto, Toronto, Canada
| | - Maryam Faiz
- Institute of Medical Science, University of Toronto, Toronto, Canada
- Division of Anatomy, Department of Surgery, University of Toronto, Toronto, Canada
| | - Patrick Küry
- Department of Neurology, Neuroregeneration laboratory, Medical Faculty, Heinrich-Heine-University, Düsseldorf, Germany
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3
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Mohapatra P, Chandrasekaran N. Wnt/β-catenin targeting in liver carcinoma through nanotechnology-based drug repurposing: A review. Biomed Pharmacother 2022; 155:113713. [PMID: 36126453 DOI: 10.1016/j.biopha.2022.113713] [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: 08/11/2022] [Revised: 09/08/2022] [Accepted: 09/15/2022] [Indexed: 11/16/2022] Open
Abstract
Liver cancer is the fifth most widespread in the world, with a high fatality rate and poor prognosis.However,surgicalresction,thermal/radiofrequencyablation,chemo/radioembolization and pathway targeting to the cancer cells are all possible options for treating Liver Carcinoma. Unfortunately, once the tumour has developed and spread, diagnosis often occurs too late. The targeted therapy has demonstrated notable, albeit modest, efficacy in some patients with advanced HCC. This demonstrates the necessity of creating additional focused treatments and, in pursuit of this end, the need to find ever-more pathways as prospective targets. Despite the critical need, there are currently no Wnt signalling directed therapy on the research field, only a few methods have progressed beyond the early stage of clinical studies. In the present study, we report that repurposing of drug previously licensed for other diseases is one possible strategy inhibit malignant cell proliferation and renewal by removing individuals protein expression in the Wnt/β-catenin pathway. Particularly β-catenin complex is present in Liver cancer, where tumour necrosis factor is indispensable for the complex formation and β-catenin interactions are disrupted upon drug in nano-carrier through nanotechnology. This study findings not only highlight that repurposing drug could improve liver cancer treatment outcomes but also focused to character traits and functions of the Wnt signalling cascade's molecular targets and how they could be used to get anti-tumour results method to targeting Wnt/β-catenin in liver carcinoma.
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4
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Santos-Lima B, Pietronigro EC, Terrabuio E, Zenaro E, Constantin G. The role of neutrophils in the dysfunction of central nervous system barriers. Front Aging Neurosci 2022; 14:965169. [PMID: 36034148 PMCID: PMC9404376 DOI: 10.3389/fnagi.2022.965169] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 07/21/2022] [Indexed: 12/04/2022] Open
Abstract
Leukocyte migration into the central nervous system (CNS) represents a central process in the development of neurological diseases with a detrimental inflammatory component. Infiltrating neutrophils have been detected inside the brain of patients with several neuroinflammatory disorders, including stroke, multiple sclerosis and Alzheimer’s disease. During inflammatory responses, these highly reactive innate immune cells can rapidly extravasate and release a plethora of pro-inflammatory and cytotoxic factors, potentially inducing significant collateral tissue damage. Indeed, several studies have shown that neutrophils promote blood-brain barrier damage and increased vascular permeability during neuroinflammatory diseases. Recent studies have shown that neutrophils migrate into the meninges and choroid plexus, suggesting these cells can also damage the blood-cerebrospinal fluid barrier (BCSFB). In this review, we discuss the emerging role of neutrophils in the dysfunction of brain barriers across different neuroinflammatory conditions and describe the molecular basis and cellular interplays involved in neutrophil-mediated injury of the CNS borders.
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5
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Monaghan KL, Aesoph D, Ammer AG, Zheng W, Rahimpour S, Farris BY, Spinner CA, Li P, Lin JX, Yu ZX, Lazarevic V, Hu G, Leonard WJ, Wan ECK. Tetramerization of STAT5 promotes autoimmune-mediated neuroinflammation. Proc Natl Acad Sci U S A 2021; 118:e2116256118. [PMID: 34934004 PMCID: PMC8719886 DOI: 10.1073/pnas.2116256118] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/02/2021] [Indexed: 12/14/2022] Open
Abstract
Signal tranducer and activator of transcription 5 (STAT5) plays a critical role in mediating cellular responses following cytokine stimulation. STAT proteins critically signal via the formation of dimers, but additionally, STAT tetramers serve key biological roles, and we previously reported their importance in T and natural killer (NK) cell biology. However, the role of STAT5 tetramerization in autoimmune-mediated neuroinflammation has not been investigated. Using the STAT5 tetramer-deficient Stat5a-Stat5b N-domain double knockin (DKI) mouse strain, we report here that STAT5 tetramers promote the pathogenesis of experimental autoimmune encephalomyelitis (EAE). The mild EAE phenotype observed in DKI mice correlates with the impaired extravasation of pathogenic T-helper 17 (Th17) cells and interactions between Th17 cells and monocyte-derived cells (MDCs) in the meninges. We further demonstrate that granulocyte-macrophage colony-stimulating factor (GM-CSF)-mediated STAT5 tetramerization regulates the production of CCL17 by MDCs. Importantly, CCL17 can partially restore the pathogenicity of DKI Th17 cells, and this is dependent on the activity of the integrin VLA-4. Thus, our study reveals a GM-CSF-STAT5 tetramer-CCL17 pathway in MDCs that promotes autoimmune neuroinflammation.
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Affiliation(s)
- Kelly L Monaghan
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Drake Aesoph
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506
| | - Amanda G Ammer
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Microscope Imaging Facility, West Virginia University, Morgantown, WV 26506
| | - Wen Zheng
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Shokofeh Rahimpour
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Breanne Y Farris
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
| | - Camille A Spinner
- Experimental Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Peng Li
- Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892
| | - Jian-Xin Lin
- Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892
| | - Zu-Xi Yu
- Pathology Core, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892
| | - Vanja Lazarevic
- Experimental Immunology Branch, National Cancer Institute, NIH, Bethesda, MD 20892
| | - Gangqing Hu
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506
- Bioinformatics Core, West Virginia University, Morgantown, WV 26506
| | - Warren J Leonard
- Laboratory of Molecular Immunology, National Heart, Lung, and Blood Institute, NIH, Bethesda, MD 20892;
| | - Edwin C K Wan
- Department of Microbiology, Immunology, and Cell Biology, West Virginia University, Morgantown, WV 26506;
- Department of Neuroscience, West Virginia University, Morgantown, WV 26506
- Rockefeller Neuroscience Institute, West Virginia University, Morgantown, WV 26506
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6
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Taherkhani A, Orangi A, Moradkhani S, Khamverdi Z. Molecular Docking Analysis of Flavonoid Compounds with Matrix Metalloproteinase- 8 for the Identification of Potential Effective Inhibitors. LETT DRUG DES DISCOV 2021. [DOI: 10.2174/1570180817999200831094703] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Background:
Matrix metalloproteinase-8 (MMP-8) participates in the degradation of different
types of collagens in the extracellular matrix and basement membrane. Up-regulation of the
MMP-8 has been demonstrated in many disorders including cancer development, tooth caries, periodontal/
peri-implant soft and hard tissue degeneration, and acute/chronic inflammation. Therefore,
MMP-8 has become an encouraging target for therapeutic procedures for scientists. We carried out a
molecular docking approach to study the binding affinity of 29 flavonoids, as drug candidates, with
the MMP-8. Pharmacokinetic and toxicological properties of the compounds were also studied.
Moreover, it was attempted to identify the most important amino acids participating in ligand binding
based on the degree of each of the amino acids in the ligand-amino acid interaction network for
MMP-8.
Methods:
Three-dimensional structure of the protein was gained from the RCSB database (PDB ID: 4QKZ).
AutoDock version 4.0 and Cytoscape 3.7.2 were used for molecular docking and network analysis,
respectively. Notably, the inhibitor of the protein in the crystalline structure of the 4QKZ was considered
as a control test. Pharmacokinetic and toxicological features of compounds were predicted
using bioinformatics web tools. Post-docking analyses were performed using BIOVIA Discovery
Studio Visualizer version 19.1.0.18287.
Results and Discussions:
According to results, 24 of the studied compounds were considered to be
top potential inhibitors for MMP-8 based on their salient estimated free energy of binding and inhibition
constant as compared with the control test: Apigenin-7-glucoside, nicotiflorin, luteolin,
glabridin, taxifolin, apigenin, licochalcone A, quercetin, isorhamnetin, myricetin, herbacetin,
kaemferol, epicatechin, chrysin, amentoflavone, rutin, orientin, epiafzelechin, quercetin-3-
rhamnoside, formononetin, isoliquiritigenin, vitexin, catechine, and isoquercitrin. Moreover, His-
197 was found to be the most important amino acid involved in the ligand binding for the enzyme.
Conclusion:
The results of the current study could be used in the prevention and therapeutic procedures
of a number of disorders such as cancer progression and invasion, oral diseases, and
acute/chronic inflammation. Although, in vitro and in vivo tests are inevitable in the future.
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Affiliation(s)
- Amir Taherkhani
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Athena Orangi
- Dental Research Center, Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Shirin Moradkhani
- Department of Pharmacognosy, School of Pharmacy, Medicinal Plants and Natural Product Research Center, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Zahra Khamverdi
- Dental Research Center, Department of Restorative Dentistry, Dental School, Hamadan University of Medical Sciences, Hamadan, Iran
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7
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Gona K, Toczek J, Ye Y, Sanzida N, Golbazi A, Boodagh P, Salarian M, Jung JJ, Rajendran S, Kukreja G, Wu TL, Devel L, Sadeghi MM. Hydroxamate-Based Selective Macrophage Elastase (MMP-12) Inhibitors and Radiotracers for Molecular Imaging. J Med Chem 2020; 63:15037-15049. [PMID: 33206510 DOI: 10.1021/acs.jmedchem.0c01514] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Macrophage elastase [matrix metalloproteinase (MMP)-12] is the most upregulated MMP in abdominal aortic aneurysm (AAA) and, hence, MMP-12-targeted imaging may predict AAA progression and rupture risk. Here, we report the design, synthesis, and evaluation of three novel hydroxamate-based selective MMP-12 inhibitors (CGA, CGA-1, and AGA) and the methodology to obtain MMP-12 selectivity from hydroxamate-based panMMP inhibitors. Also, we report two 99mTc-radiotracers, 99mTc-AGA-1 and 99mTc-AGA-2, derived from AGA. 99mTc-AGA-2 displayed faster blood clearance in mice and better radiochemical stability compared to 99mTc-AGA-1. Based on this, 99mTc-AGA-2 was chosen as the lead tracer and tested in murine AAA. 99mTc-AGA-2 uptake detected by autoradiography was significantly higher in AAA compared to normal aortic regions. Specific binding of the tracer to MMP-12 was demonstrated through ex vivo competition. Accordingly, this study introduces a novel family of selective MMP-12 inhibitors and tracers, paving the way for further development of these agents as therapeutic and imaging agents.
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Affiliation(s)
- Kiran Gona
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Jakub Toczek
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Yunpeng Ye
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Nowshin Sanzida
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Arvene Golbazi
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Parnaz Boodagh
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Mani Salarian
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Jae-Joon Jung
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Saranya Rajendran
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Gunjan Kukreja
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
| | - Terence L Wu
- Yale West Campus Analytical Core, Yale University, West Haven, Connecticut 06516, United States
| | - Laurent Devel
- CEA, INRAE, Medicaments et Technologies pour la Sante (MTS), SIMoS, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - Mehran M Sadeghi
- Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine and Yale Cardiovascular Research Center, Yale University School of Medicine, New Haven, Connecticut 06511, United States.,Veterans Affairs Connecticut Healthcare System, West Haven, Connecticut 06516, United States
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8
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Oncostatin M-induced astrocytic tissue inhibitor of metalloproteinases-1 drives remyelination. Proc Natl Acad Sci U S A 2020; 117:5028-5038. [PMID: 32071226 DOI: 10.1073/pnas.1912910117] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The brain's endogenous capacity to restore damaged myelin deteriorates during the course of demyelinating disorders. Currently, no treatment options are available to establish remyelination. Chronic demyelination leads to damaged axons and irreversible destruction of the central nervous system (CNS). We identified two promising therapeutic candidates which enhance remyelination: oncostatin M (OSM), a member of the interleukin-6 family, and downstream mediator tissue inhibitor of metalloproteinases-1 (TIMP-1). While remyelination was completely abrogated in OSMRβ knockout (KO) mice, OSM overexpression in the chronically demyelinated CNS established remyelination. Astrocytic TIMP-1 was demonstrated to play a pivotal role in OSM-mediated remyelination. Astrocyte-derived TIMP-1 drove differentiation of oligodendrocyte precursor cells into mature oligodendrocytes in vitro. In vivo, TIMP-1 deficiency completely abolished spontaneous remyelination, phenocopying OSMRβ KO mice. Finally, TIMP-1 was expressed by human astrocytes in demyelinated multiple sclerosis lesions, confirming the human value of our findings. Taken together, OSM and its downstream mediator TIMP-1 have the therapeutic potential to boost remyelination in demyelinating disorders.
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9
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Ysrayl BB, Balasubramaniam M, Albert I, Villalta F, Pandhare J, Dash C. A Novel Role of Prolidase in Cocaine-Mediated Breach in the Barrier of Brain Microvascular Endothelial Cells. Sci Rep 2019; 9:2567. [PMID: 30796241 PMCID: PMC6385491 DOI: 10.1038/s41598-018-37495-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 11/26/2018] [Indexed: 02/06/2023] Open
Abstract
Cocaine use is associated with breach in the blood brain barrier (BBB) and increased HIV-1 neuro-invasion. We show that the cellular enzyme "Prolidase" plays a key role in cocaine-induced disruption of the BBB. We established a barrier model to mimic the BBB by culturing human brain microvascular endothelial cells (HBMECs) in transwell inserts. In this model, cocaine treatment enhanced permeability of FITC-dextran suggesting a breach in the barrier. Interestingly, cocaine treatment increased the activity of matrix metallo-proteinases that initiate degradation of the BBB-associated collagen. Cocaine exposure also induced prolidase expression and activity in HBMECs. Prolidase catalyzes the final and rate-limiting step of collagen degradation during BBB remodeling. Knock-down of prolidase abrogated cocaine-mediated increased permeability suggesting a direct role of prolidase in BBB breach. To decipher the mechanism by which cocaine regulates prolidase, we probed the inducible nitric oxide synthase (iNOS) mediated phosphorylation of prolidase since mRNA levels of the protein were not altered upon cocaine treatment. We observed increased iNOS expression concurrent with increased prolidase phosphorylation in cocaine treated cells. Subsequently, inhibition of iNOS decreased prolidase phosphorylation and reduced cocaine-mediated permeability. Finally, cocaine treatment increased transmigration of monocytic cells through the HBMEC barrier. Knock-down of prolidase reduced cocaine-mediated monocyte transmigration, establishing a key role of prolidase in cocaine-induced breach in endothelial cell barrier.
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Affiliation(s)
- Binah Baht Ysrayl
- Center for AIDS Health Disparities Research, Meharry Medical College, Nashville, Tennessee, USA
- Center for Molecular and Behavioral Neurosciences, Meharry Medical College, Nashville, Tennessee, USA
- School of Graduate Studies and Research, Meharry Medical College, Nashville, Tennessee, USA
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, Nashville, Tennessee, USA
| | - Muthukumar Balasubramaniam
- Center for AIDS Health Disparities Research, Meharry Medical College, Nashville, Tennessee, USA
- Center for Molecular and Behavioral Neurosciences, Meharry Medical College, Nashville, Tennessee, USA
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, Nashville, Tennessee, USA
| | - Ife Albert
- Center for AIDS Health Disparities Research, Meharry Medical College, Nashville, Tennessee, USA
| | - Fernando Villalta
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, Nashville, Tennessee, USA
| | - Jui Pandhare
- Center for AIDS Health Disparities Research, Meharry Medical College, Nashville, Tennessee, USA.
- Center for Molecular and Behavioral Neurosciences, Meharry Medical College, Nashville, Tennessee, USA.
- School of Graduate Studies and Research, Meharry Medical College, Nashville, Tennessee, USA.
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, Nashville, Tennessee, USA.
| | - Chandravanu Dash
- Center for AIDS Health Disparities Research, Meharry Medical College, Nashville, Tennessee, USA.
- Center for Molecular and Behavioral Neurosciences, Meharry Medical College, Nashville, Tennessee, USA.
- School of Graduate Studies and Research, Meharry Medical College, Nashville, Tennessee, USA.
- Department of Microbiology, Immunology, and Physiology, Meharry Medical College, Nashville, Tennessee, USA.
- Department of Biochemistry, Cancer Biology, Neuroscience and Pharmacology, Meharry Medical College, Nashville, Tennessee, USA.
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10
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Zhang J, Wan Q, Yu X, Cheng G, Ni Y, Li Z. Low-dose nicotine reduces the homing ability of murine BMSCs during fracture healing. Am J Transl Res 2018; 10:2796-2809. [PMID: 30323867 PMCID: PMC6176232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 08/07/2018] [Indexed: 06/08/2023]
Abstract
Wound and fracture healing are affected by exposure to nicotine and other compounds in cigarettes. This study examined the effects of exposure to low-dose nicotine at sub-toxic concentrations on the proliferation, differentiation and migration of bone marrow stem cells (BMSCs) in vitro and their homing to fracture site in C57BL/6 mice. BMSCs were investigated in cells treated with or without nicotine (1 μM to 1 mM). Different concentrations of nicotine exhibited varied effects on BMSCs growth regulation and bone differentiation. CCK8 test significantly increased at a high nicotine concentration of 1 mM while calcium nodule staining with Alizarin red decreased at the same concentration. In vitro scratch test, Transwell tests and in vivo BMSCs homing tests showed negative effects on BMSCs migration at 10 μM to 1 mM nicotine test. Real-time PCR analysis revealed the down-regulation of SDF-1, CXCR4 and CXCR7, which were members of the potent chemotactic signaling system. Western blot analysis indicated the down-regulated expression levels of periostin expressed by nicotine-treated osteoblasts (1 μM to 100 μM). Micro CT results showed that nicotine delayed the fracture healing in mice. Our data suggest that exposure to low-dose nicotine concentrations may affect bone formation by inhibiting the migration and homing of BMSCs, which may be an important risk factor for bone healing delay in smoking patients.
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Affiliation(s)
- Jing Zhang
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology and Department of Oral and Maxillofacial Trauma and Plastic Surgery, Wuhan University Stomatological Hospital, Wuhan University Wuhan 430079, Hubei, China
| | - Qilong Wan
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology and Department of Oral and Maxillofacial Trauma and Plastic Surgery, Wuhan University Stomatological Hospital, Wuhan University Wuhan 430079, Hubei, China
| | - Xin Yu
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology and Department of Oral and Maxillofacial Trauma and Plastic Surgery, Wuhan University Stomatological Hospital, Wuhan University Wuhan 430079, Hubei, China
| | - Gu Cheng
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology and Department of Oral and Maxillofacial Trauma and Plastic Surgery, Wuhan University Stomatological Hospital, Wuhan University Wuhan 430079, Hubei, China
| | - Yifeng Ni
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology and Department of Oral and Maxillofacial Trauma and Plastic Surgery, Wuhan University Stomatological Hospital, Wuhan University Wuhan 430079, Hubei, China
| | - Zubing Li
- State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine, Ministry of Education, School and Hospital of Stomatology and Department of Oral and Maxillofacial Trauma and Plastic Surgery, Wuhan University Stomatological Hospital, Wuhan University Wuhan 430079, Hubei, China
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11
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Piro JR, Suidan GL, Quan J, Pi Y, O'Neill SM, Ilardi M, Pozdnyakov N, Lanz TA, Xi H, Bell RD, Samad TA. Inhibition of 2-AG hydrolysis differentially regulates blood brain barrier permeability after injury. J Neuroinflammation 2018; 15:142. [PMID: 29759062 PMCID: PMC5952841 DOI: 10.1186/s12974-018-1166-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Accepted: 04/18/2018] [Indexed: 12/16/2022] Open
Abstract
Background Acute neurological insults caused by infection, systemic inflammation, ischemia, or traumatic injury are often associated with breakdown of the blood-brain barrier (BBB) followed by infiltration of peripheral immune cells, cytotoxic proteins, and water. BBB breakdown and extravasation of these peripheral components into the brain parenchyma result in inflammation, oxidative stress, edema, excitotoxicity, and neurodegeneration. These downstream consequences of BBB dysfunction can drive pathophysiological processes and play a substantial role in the morbidity and mortality of acute and chronic neurological insults, and contribute to long-term sequelae. Preserving or rescuing BBB integrity and homeostasis therefore represents a translational research area of high therapeutic potential. Methods Induction of general and localized BBB disruption in mice was carried out using systemic administration of LPS and focal photothrombotic ischemic insult, respectively, in the presence and absence of the monoacylglycerol lipase (MAGL) inhibitor, CPD-4645. The effects of CPD-4645 treatment were assessed by gene expression analysis performed on neurovascular-enriched brain fractions, cytokine and inflammatory mediator measurement, and functional assessment of BBB permeability. The mechanism of action of CPD-4645 was studied pharmacologically using inverse agonists/antagonists of the cannabinoid receptors CB1 and CB2. Results Here, we demonstrate that the neurovasculature exhibits a unique transcriptional signature following inflammatory insults, and pharmacological inhibition of MAGL using a newly characterized inhibitor rescues the transcriptional profile of brain vasculature and restores its functional homeostasis. This pronounced effect of MAGL inhibition on blood-brain barrier permeability is evident following both systemic inflammatory and localized ischemic insults. Mechanistically, the protective effects of the MAGL inhibitor are partially mediated by cannabinoid receptor signaling in the ischemic brain insult. Conclusions Our results support considering MAGL inhibitors as potential therapeutics for BBB dysfunction and cerebral edema associated with inflammatory brain insults. Electronic supplementary material The online version of this article (10.1186/s12974-018-1166-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Justin R Piro
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA. .,Present Address: Abbvie Inc., 200 Sidney St., Cambridge, MA, 02139, USA.
| | - Georgette L Suidan
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA.,Present Address: Biogen, 225 Binney St., Cambridge, MA, 02142, USA
| | - Jie Quan
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA
| | - YeQing Pi
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA.,Present Address: Biogen, 225 Binney St., Cambridge, MA, 02142, USA
| | - Sharon M O'Neill
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA.,Present Address: Biogen, 225 Binney St., Cambridge, MA, 02142, USA
| | - Marissa Ilardi
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA.,Present Address: NYU School of Medicine, 550 1st Ave., New York, NY, 10016, USA
| | | | - Thomas A Lanz
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA.,Present Address: Biogen, 225 Binney St., Cambridge, MA, 02142, USA
| | - Hualin Xi
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA.,Present Address: Abbvie Inc., 200 Sidney St., Cambridge, MA, 02139, USA
| | - Robert D Bell
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA
| | - Tarek A Samad
- Pfizer Worldwide Research & Development, Cambridge, MA, 02139, USA. .,Present Address: Sanofi R&D, 49 New York Ave., Framingham, MA, 01701, USA.
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Ou Q, Hu Y, Yao S, Wang Y, Lin X. Effect of matrix metalloproteinase 8 inhibitor on resin–dentin bonds. Dent Mater 2018; 34:756-763. [DOI: 10.1016/j.dental.2018.01.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 01/26/2018] [Accepted: 01/31/2018] [Indexed: 02/08/2023]
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13
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Singh SK, Prasad KN, Singh AK, Gupta KK, Singh A, Tripathi M, Gupta RK. Adhesion molecules, chemokines and matrix metallo-proteinases response after albendazole and albendazole plus steroid therapy in swine neurocysticercosis. Exp Parasitol 2017; 182:1-8. [DOI: 10.1016/j.exppara.2017.08.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 06/23/2017] [Accepted: 08/13/2017] [Indexed: 01/15/2023]
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Kumar H, Jo MJ, Choi H, Muttigi MS, Shon S, Kim BJ, Lee SH, Han IB. Matrix Metalloproteinase-8 Inhibition Prevents Disruption of Blood–Spinal Cord Barrier and Attenuates Inflammation in Rat Model of Spinal Cord Injury. Mol Neurobiol 2017; 55:2577-2590. [DOI: 10.1007/s12035-017-0509-3] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 04/04/2017] [Indexed: 02/02/2023]
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Fiorentino M, Sapone A, Senger S, Camhi SS, Kadzielski SM, Buie TM, Kelly DL, Cascella N, Fasano A. Blood-brain barrier and intestinal epithelial barrier alterations in autism spectrum disorders. Mol Autism 2016; 7:49. [PMID: 27957319 PMCID: PMC5129651 DOI: 10.1186/s13229-016-0110-z] [Citation(s) in RCA: 264] [Impact Index Per Article: 33.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Accepted: 11/12/2016] [Indexed: 12/11/2022] Open
Abstract
Background Autism spectrum disorders (ASD) are complex conditions whose pathogenesis may be attributed to gene–environment interactions. There are no definitive mechanisms explaining how environmental triggers can lead to ASD although the involvement of inflammation and immunity has been suggested. Inappropriate antigen trafficking through an impaired intestinal barrier, followed by passage of these antigens or immune-activated complexes through a permissive blood–brain barrier (BBB), can be part of the chain of events leading to these disorders. Our goal was to investigate whether an altered BBB and gut permeability is part of the pathophysiology of ASD. Methods Postmortem cerebral cortex and cerebellum tissues from ASD, schizophrenia (SCZ), and healthy subjects (HC) and duodenal biopsies from ASD and HC were analyzed for gene and protein expression profiles. Tight junctions and other key molecules associated with the neurovascular unit integrity and function and neuroinflammation were investigated. Results Claudin (CLDN)-5 and -12 were increased in the ASD cortex and cerebellum. CLDN-3, tricellulin, and MMP-9 were higher in the ASD cortex. IL-8, tPA, and IBA-1 were downregulated in SCZ cortex; IL-1b was increased in the SCZ cerebellum. Differences between SCZ and ASD were observed for most of the genes analyzed in both brain areas. CLDN-5 protein was increased in ASD cortex and cerebellum, while CLDN-12 appeared reduced in both ASD and SCZ cortexes. In the intestine, 75% of the ASD samples analyzed had reduced expression of barrier-forming TJ components (CLDN-1, OCLN, TRIC), whereas 66% had increased pore-forming CLDNs (CLDN-2, -10, -15) compared to controls. Conclusions In the ASD brain, there is an altered expression of genes associated with BBB integrity coupled with increased neuroinflammation and possibly impaired gut barrier integrity. While these findings seem to be specific for ASD, the possibility of more distinct SCZ subgroups should be explored with additional studies.
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Affiliation(s)
- Maria Fiorentino
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Boston, MA USA ; Department of Pediatrics, Harvard Medical School, Boston, MA USA
| | - Anna Sapone
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Boston, MA USA ; Department of Medicine, Celiac Center, Division of Gastroenterology, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA USA
| | - Stefania Senger
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Boston, MA USA ; Department of Pediatrics, Harvard Medical School, Boston, MA USA
| | - Stephanie S Camhi
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Boston, MA USA ; Center for Celiac Research and Division of Pediatric Gastroenterology and Nutrition, Massachusetts General Hospital for Children, Boston, MA USA
| | | | - Timothy M Buie
- Department of Pediatrics, Harvard Medical School, Boston, MA USA
| | - Deanna L Kelly
- Maryland Psychiatric Research Center, University of Maryland School of Medicine, Baltimore, MD USA
| | - Nicola Cascella
- Neuropsychiatry Program, Sheppard Pratt Health System, Baltimore, MD USA
| | - Alessio Fasano
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Boston, MA USA ; Center for Celiac Research and Division of Pediatric Gastroenterology and Nutrition, Massachusetts General Hospital for Children, Boston, MA USA ; Department of Pediatrics, Harvard Medical School, Boston, MA USA
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Rempe RG, Hartz AMS, Bauer B. Matrix metalloproteinases in the brain and blood-brain barrier: Versatile breakers and makers. J Cereb Blood Flow Metab 2016; 36:1481-507. [PMID: 27323783 PMCID: PMC5012524 DOI: 10.1177/0271678x16655551] [Citation(s) in RCA: 403] [Impact Index Per Article: 50.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Accepted: 05/26/2016] [Indexed: 02/01/2023]
Abstract
Matrix metalloproteinases are versatile endopeptidases with many different functions in the body in health and disease. In the brain, matrix metalloproteinases are critical for tissue formation, neuronal network remodeling, and blood-brain barrier integrity. Many reviews have been published on matrix metalloproteinases before, most of which focus on the two best studied matrix metalloproteinases, the gelatinases MMP-2 and MMP-9, and their role in one or two diseases. In this review, we provide a broad overview of the role various matrix metalloproteinases play in brain disorders. We summarize and review current knowledge and understanding of matrix metalloproteinases in the brain and at the blood-brain barrier in neuroinflammation, multiple sclerosis, cerebral aneurysms, stroke, epilepsy, Alzheimer's disease, Parkinson's disease, and brain cancer. We discuss the detrimental effects matrix metalloproteinases can have in these conditions, contributing to blood-brain barrier leakage, neuroinflammation, neurotoxicity, demyelination, tumor angiogenesis, and cancer metastasis. We also discuss the beneficial role matrix metalloproteinases can play in neuroprotection and anti-inflammation. Finally, we address matrix metalloproteinases as potential therapeutic targets. Together, in this comprehensive review, we summarize current understanding and knowledge of matrix metalloproteinases in the brain and at the blood-brain barrier in brain disorders.
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Affiliation(s)
- Ralf G Rempe
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA
| | - Anika M S Hartz
- Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY, USA Department of Pharmacology and Nutritional Sciences, College of Medicine, University of Kentucky, Lexington, KY, USA
| | - Björn Bauer
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY, USA
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Matrix Metalloproteinases in Non-Neoplastic Disorders. Int J Mol Sci 2016; 17:ijms17071178. [PMID: 27455234 PMCID: PMC4964549 DOI: 10.3390/ijms17071178] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 06/16/2016] [Accepted: 07/04/2016] [Indexed: 12/23/2022] Open
Abstract
The matrix metalloproteinases (MMPs) are zinc-dependent endopeptidases belonging to the metzincin superfamily. There are at least 23 members of MMPs ever reported in human, and they and their substrates are widely expressed in many tissues. Recent growing evidence has established that MMP not only can degrade a variety of components of extracellular matrix, but also can cleave and activate various non-matrix proteins, including cytokines, chemokines and growth factors, contributing to both physiological and pathological processes. In normal conditions, MMP expression and activity are tightly regulated via interactions between their activators and inhibitors. Imbalance among these factors, however, results in dysregulated MMP activity, which causes tissue destruction and functional alteration or local inflammation, leading to the development of diverse diseases, such as cardiovascular disease, arthritis, neurodegenerative disease, as well as cancer. This article focuses on the accumulated evidence supporting a wide range of roles of MMPs in various non-neoplastic diseases and provides an outlook on the therapeutic potential of inhibiting MMP action.
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Domingues HS, Portugal CC, Socodato R, Relvas JB. Oligodendrocyte, Astrocyte, and Microglia Crosstalk in Myelin Development, Damage, and Repair. Front Cell Dev Biol 2016; 4:71. [PMID: 27551677 PMCID: PMC4923166 DOI: 10.3389/fcell.2016.00071] [Citation(s) in RCA: 196] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 06/15/2016] [Indexed: 01/01/2023] Open
Abstract
Oligodendrocytes are the myelinating glia of the central nervous system. Myelination of axons allows rapid saltatory conduction of nerve impulses and contributes to axonal integrity. Devastating neurological deficits caused by demyelinating diseases, such as multiple sclerosis, illustrate well the importance of the process. In this review, we focus on the positive and negative interactions between oligodendrocytes, astrocytes, and microglia during developmental myelination and remyelination. Even though many lines of evidence support a crucial role for glia crosstalk during these processes, the nature of such interactions is often neglected when designing therapeutics for repair of demyelinated lesions. Understanding the cellular and molecular mechanisms underlying glial cell communication and how they influence oligodendrocyte differentiation and myelination is fundamental to uncover novel therapeutic strategies for myelin repair.
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Affiliation(s)
- Helena S Domingues
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
| | - Camila C Portugal
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
| | - Renato Socodato
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
| | - João B Relvas
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
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Onuoha SC, Ferrari M, Sblattero D, Pitzalis C. Rational design of antirheumatic prodrugs specific for sites of inflammation. Arthritis Rheumatol 2016; 67:2661-72. [PMID: 26097196 PMCID: PMC4832285 DOI: 10.1002/art.39232] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 06/04/2015] [Indexed: 12/16/2022]
Abstract
Objective Biologic drugs, such as the anti–tumor necrosis factor (anti‐TNF) antibody adalimumab, have represented a breakthrough in the treatment of rheumatoid arthritis. Yet, concerns remain over their lack of efficacy in a sizable proportion of patients and their potential for systemic side effects such as infection. Improved biologic prodrugs specifically targeted to the site of inflammation have the potential to alleviate current concerns surrounding biologic anticytokine therapies. The purpose of this study was to design, construct, and evaluate in vitro and ex vivo the targeting and antiinflammatory capacity of activatable bispecific antibodies. Methods Activatable dual variable domain (aDVD) antibodies were designed and constructed to target intercellular adhesion molecule 1 (ICAM‐1), which is up‐regulated at sites of inflammation, and anti‐TNF antibodies (adalimumab and infliximab). These bispecific molecules included an external arm that targets ICAM‐1 and an internal arm that comprises the therapeutic domain of an anti‐TNF antibody. Both arms were linked to matrix metalloproteinase (MMP)–cleavable linkers. The constructs were tested for their ability to bind and neutralize both in vitro and ex vivo targets. Results Intact aDVD constructs demonstrated significantly reduced binding and anti‐TNF activity in the prodrug formulation as compared to the parent antibodies. Human synovial fluid and physiologic concentrations of MMP enzyme were capable of cleaving the external domain of the antibody, revealing a fully active molecule. Activated antibodies retained the same binding and anti‐TNF inhibitory capacities as the parent molecules. Conclusion The design of a biologic prodrug with enhanced specificity for sites of inflammation (synovium) and reduced specificity for off‐target TNF is described. This construct has the potential to form a platform technology that is capable of enhancing the therapeutic index of drugs for the treatment of RA and other inflammatory diseases.
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Affiliation(s)
- Shimobi C Onuoha
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, and Queen Mary University of London, London, UK
| | - Mathieu Ferrari
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, and Queen Mary University of London, London, UK
| | | | - Costantino Pitzalis
- William Harvey Research Institute, Barts and The London School of Medicine and Dentistry, and Queen Mary University of London, London, UK
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Domingues HS, Portugal CC, Socodato R, Relvas JB. Oligodendrocyte, Astrocyte, and Microglia Crosstalk in Myelin Development, Damage, and Repair. Front Cell Dev Biol 2016. [PMID: 27551677 DOI: 10.3389/fcell.2016.00071.ecollection2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2023] Open
Abstract
Oligodendrocytes are the myelinating glia of the central nervous system. Myelination of axons allows rapid saltatory conduction of nerve impulses and contributes to axonal integrity. Devastating neurological deficits caused by demyelinating diseases, such as multiple sclerosis, illustrate well the importance of the process. In this review, we focus on the positive and negative interactions between oligodendrocytes, astrocytes, and microglia during developmental myelination and remyelination. Even though many lines of evidence support a crucial role for glia crosstalk during these processes, the nature of such interactions is often neglected when designing therapeutics for repair of demyelinated lesions. Understanding the cellular and molecular mechanisms underlying glial cell communication and how they influence oligodendrocyte differentiation and myelination is fundamental to uncover novel therapeutic strategies for myelin repair.
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Affiliation(s)
- Helena S Domingues
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
| | - Camila C Portugal
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
| | - Renato Socodato
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
| | - João B Relvas
- Glial Cell Biology Group, Instituto de Biologia Molecular e Celular, Universidade do PortoPorto, Portugal; Glial Cell Biology Group, Instituto de Investigação e Inovação em Saúde (I3S), Universidade do PortoPorto, Portugal
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Seo JE, Hasan M, Han JS, Kang MJ, Jung BH, Kwok SK, Kim HY, Kwon OS. Experimental autoimmune encephalomyelitis and age-related correlations of NADPH oxidase, MMP-9, and cell adhesion molecules: The increased disease severity and blood–brain barrier permeability in middle-aged mice. J Neuroimmunol 2015; 287:43-53. [DOI: 10.1016/j.jneuroim.2015.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Accepted: 08/04/2015] [Indexed: 12/18/2022]
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Expression of adhesion molecules, chemokines and matrix metallo- proteinases (MMPs) in viable and degenerating stage of Taenia solium metacestode in swine neurocysticercosis. Vet Parasitol 2015; 214:59-66. [PMID: 26412140 DOI: 10.1016/j.vetpar.2015.09.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/27/2015] [Accepted: 09/12/2015] [Indexed: 01/13/2023]
Abstract
Neurocysticercosis (NCC) is a parasitic infection of central nervous system (CNS). Expression of adhesion molecules, chemokines and matrix metalloproteinases (MMPs) were investigated on brain tissues surrounding viable (n=15) and degenerating cysticerci (n=15) of Taenia solium in swine by real-time RT-PCR and ELISA. Gelatin gel zymography was performed for MMPs activity. ICAM-1 (intercellular adhesion molecule-1), E-selectin, MIP-1α (macrophage inflammatory protein-1α), Eotaxin-1 and RANTES (regulated on activation, normal T cell expressed and secreted) were associated with degenerating cysticerci (cysts). However, VCAM-1 (vascular cell adhesion molecule-1), MCP-1 (monocyte chemotactic protein-1), MMP-2 and MMP-9 were associated with both viable and degenerating cysts. In conclusion, viable and degenerating cysticerci have different immune molecule profiles and role of these molecules in disease pathogenesis needs to be investigated.
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23
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Activity, but not mRNA expression of gelatinases correlates with susceptibility to experimental autoimmune encephalomyelitis. Neuroscience 2015; 292:1-12. [DOI: 10.1016/j.neuroscience.2015.02.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/07/2015] [Accepted: 02/10/2015] [Indexed: 01/17/2023]
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Gallo V, Deneen B. Glial development: the crossroads of regeneration and repair in the CNS. Neuron 2014; 83:283-308. [PMID: 25033178 DOI: 10.1016/j.neuron.2014.06.010] [Citation(s) in RCA: 150] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/11/2014] [Indexed: 02/07/2023]
Abstract
Given the complexities of the mammalian CNS, its regeneration is viewed as the holy grail of regenerative medicine. Extraordinary efforts have been made to understand developmental neurogenesis, with the hopes of clinically applying this knowledge. CNS regeneration also involves glia, which comprises at least 50% of the cellular constituency of the brain and is involved in all forms of injury and disease response, recovery, and regeneration. Recent developmental studies have given us unprecedented insight into the processes that regulate the generation of CNS glia. Because restorative processes often parallel those found in development, we will peer through the lens of developmental gliogenesis to gain a clearer understanding of the processes that underlie glial regeneration under pathological conditions. Specifically, this review will focus on key signaling pathways that regulate astrocyte and oligodendrocyte development and describe how these mechanisms are reutilized in these populations during regeneration and repair after CNS injury.
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Affiliation(s)
- Vittorio Gallo
- Center for Neuroscience Research, Children's National Medical Center, Washington, DC 20010, USA.
| | - Benjamin Deneen
- Department of Neuroscience and Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX 77030, USA.
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Minagar A. Multiple Sclerosis: An Overview of Clinical Features, Pathophysiology, Neuroimaging, and Treatment Options. ACTA ACUST UNITED AC 2014. [DOI: 10.4199/c00116ed1v01y201408isp055] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Nissinen L, Kähäri VM. Matrix metalloproteinases in inflammation. Biochim Biophys Acta Gen Subj 2014; 1840:2571-80. [PMID: 24631662 DOI: 10.1016/j.bbagen.2014.03.007] [Citation(s) in RCA: 289] [Impact Index Per Article: 28.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 03/03/2014] [Accepted: 03/05/2014] [Indexed: 11/26/2022]
Abstract
BACKGROUND Matrix metalloproteinases (MMPs) are a family of ubiquitously expressed zinc-dependent endopeptidases with broad substrate specificity and strictly regulated tissue specific expression. They are expressed in physiological situations and pathological conditions involving inflammation. MMPs regulate several functions related to inflammation including bioavailability and activity of inflammatory cytokines and chemokines. There is also evidence that MMPs regulate inflammation in tumor microenvironment, which plays an important role in cancer progression. SCOPE OF REVIEW Here, we discuss the current view on the role of MMPs in the regulation of inflammation. MAJOR CONCLUSIONS MMPs modulate inflammation by regulating bioavailability and activity of cytokines, chemokines, and growth factors, as well as integrity of physical tissue barriers. MMPs are also involved in immune evasion of tumor cells and in regulation of inflammation in tumor microenvironment. GENERAL SIGNIFICANCE There is increasing evidence for non-matrix substrates of MMPs that are related to regulation of inflammatory processes. New methods have been employed for identification of the substrates of MMPs in inflammatory processes in vivo. Detailed information on the substrates of MMPs may offer more specific and effective ways of inhibiting MMP function by blocking the cleavage site in substrate or by inhibition of the bioactivity of the substrate. It is expected, that more precise information on the MMP-substrate interaction may offer novel strategies for therapeutic intervention in inflammatory diseases and cancer without blocking beneficial actions of MMPs. This article is part of a Special Issue entitled Matrix-mediated cell behaviour and properties.
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Affiliation(s)
- Liisa Nissinen
- Department of Dermatology, University of Turku and Turku University Hospital, FI-20521, Turku, Finland
| | - Veli-Matti Kähäri
- Department of Dermatology, University of Turku and Turku University Hospital, FI-20521, Turku, Finland.
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Baranger K, Rivera S, Liechti FD, Grandgirard D, Bigas J, Seco J, Tarrago T, Leib SL, Khrestchatisky M. Endogenous and synthetic MMP inhibitors in CNS physiopathology. PROGRESS IN BRAIN RESEARCH 2014; 214:313-51. [DOI: 10.1016/b978-0-444-63486-3.00014-1] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Javaid MA, Abdallah MN, Ahmed AS, Sheikh Z. Matrix metalloproteinases and their pathological upregulation in multiple sclerosis: an overview. Acta Neurol Belg 2013; 113:381-90. [PMID: 24002649 DOI: 10.1007/s13760-013-0239-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Accepted: 07/24/2013] [Indexed: 01/17/2023]
Abstract
Matrix metalloproteinases (MMPs) are a family of extracellular proteases associated with extracellular matrix remodeling. They are involved in many physiological and reparative processes. MMPs can break down all extracellular constituents; therefore, their expression is very tightly regulated and their abnormal activity or over production has been linked to many diseases including multiple sclerosis (MS) which is a leading cause of non-traumatic disability in young adults in North America. Recently many studies, both in animals and humans, have been conducted to better elucidate the underlying causes, mechanisms and pathophysiology of MS. In this review, we discuss the potential role of pathological upregulation of MMPs in MS and future challenges which if properly addressed might help in development of potential cure for this disease.
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Affiliation(s)
- Mohammad A Javaid
- Division of Biomedical Sciences, Faculty of Dentistry, McGill University, 3640 University Street, Montreal, QC, H3A 0C7, Canada,
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Roberts DJ, Jenne CN, Léger C, Kramer AH, Gallagher CN, Todd S, Parney IF, Doig CJ, Yong VW, Kubes P, Zygun DA. A prospective evaluation of the temporal matrix metalloproteinase response after severe traumatic brain injury in humans. J Neurotrauma 2013; 30:1717-26. [PMID: 23725031 DOI: 10.1089/neu.2012.2841] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract Accumulating pre-clinical data suggests that matrix metalloproteinase (MMP) expression plays a critical role in the pathophysiology of secondary brain injury. We conducted a prospective multimodal monitoring study in order to characterize the temporal MMP response after severe traumatic brain injury (TBI) in eight critically ill humans and its relationship with outcomes. High-cutoff, cerebral microdialysis (n=8); external ventricular drainage (n=3); and arterial and jugular venous bulb catheters were used to collect microdialysate, cerebrospinal fluid, and arterial and jugular bulb blood over 6 days. Levels of MMP-8 and -9 were initially high in microdialysate and then gradually declined over time. After these MMPs decreased, a spike in the microdialysate levels of MMP-2 and -3 occurred, followed by a gradual rise in the microdialysate concentration of MMP-7. Use of generalized estimating equations suggested that MMP-8 concentration in microdialysate was associated with mortality (p=0.019) and neurological outcome at hospital discharge (p=0.013). Moreover, the mean microdialysate concentration of MMP-8 was 2.4-fold higher among those who died after severe TBI than in those who survived. Mean microdialysate levels of MMP-8 also rose with increasing intracranial pressure (ICP), whereas those of MMP-7 decreased with increasing cerebral perfusion pressure (CPP). Significant changes in the mean microdialysate concentrations of MMP-1, -2, -3, and -9 and MMP-1, -2, -3, -7, and -9 also occurred with increases in microdialysate glucose and the lactate/pyruvate ratio, respectively. These results imply that monitoring of MMPs following severe TBI in humans is feasible, and that their expression may be associated with clinical outcomes, ICP, CPP, and cerebral metabolism.
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Affiliation(s)
- Derek J Roberts
- 1 Department of Surgery, University of Calgary and the Foothills Medical Center , Calgary, Alberta, Canada
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Lu J, Kurejova M, Wirotanseng LN, Linker RA, Kuner R, Tappe-Theodor A. Pain in experimental autoimmune encephalitis: a comparative study between different mouse models. J Neuroinflammation 2012; 9:233. [PMID: 23039175 PMCID: PMC3582444 DOI: 10.1186/1742-2094-9-233] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Accepted: 09/18/2012] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Pain can be one of the most severe symptoms associated with multiple sclerosis (MS) and develops with varying levels and time courses. MS-related pain is difficult to treat, since very little is known about the mechanisms underlying its development. Animal models of experimental autoimmune encephalomyelitis (EAE) mimic many aspects of MS and are well-suited to study underlying pathophysiological mechanisms. Yet, to date very little is known about the sensory abnormalities in different EAE models. We therefore aimed to thoroughly characterize pain behavior of the hindpaw in SJL and C57BL/6 mice immunized with PLP139-151 peptide or MOG35-55 peptide respectively. Moreover, we studied the activity of pain-related molecules and plasticity-related genes in the spinal cord and investigated functional changes in the peripheral nerves using electrophysiology. METHODS We analyzed thermal and mechanical sensitivity of the hindpaw in both EAE models during the whole disease course. Qualitative and quantitative immunohistochemical analysis of pain-related molecules and plasticity-related genes was performed on spinal cord sections at different timepoints during the disease course. Moreover, we investigated functional changes in the peripheral nerves using electrophysiology. RESULTS Mice in both EAE models developed thermal hyperalgesia during the chronic phase of the disease. However, whereas SJL mice developed marked mechanical allodynia over the chronic phase of the disease, C57BL/6 mice developed only minor mechanical allodynia over the onset and peak phase of the disease. Interestingly, the magnitude of glial changes in the spinal cord was stronger in SJL mice than in C57BL/6 mice and their time course matched the temporal profile of mechanical hypersensitivity. CONCLUSIONS Diverse EAE models bearing genetic, clinical and histopathological heterogeneity, show different profiles of sensory and pathological changes and thereby enable studying the mechanistic basis and the diversity of changes in pain perception that are associated with distinct types of MS.
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Affiliation(s)
- Jianning Lu
- Pharmacology Institut, University of Heidelberg, Im Neuenheimer Feld 366, Heidelberg, D-69120, Germany
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Kim YH, Kwon HJ, Kim DS. Matrix metalloproteinase 9 (MMP-9)-dependent processing of βig-h3 protein regulates cell migration, invasion, and adhesion. J Biol Chem 2012; 287:38957-69. [PMID: 23019342 DOI: 10.1074/jbc.m112.357863] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Cell migration is critically involved in inflammation, cancer, and development. In this study, transforming growth factor-β-induced protein (βig-h3) was identified as a substrate of matrix metalloproteinase-9 (MMP-9) by site-directed mutagenesis. βig-h3 has two cleavage sites with the consensus sequence Pro-Xaa-Xaa-Hy-(Ser/Thr) (Hy is a hydrophobic amino acid) (PGSFT beginning at amino acid 135 and PPMGT beginning at amino acid 501). Using recombinant human βig-h3 and MMP-9, βig-h3 from βig-h3-transfected HEK293F cells, and MMP-9 from MMP-9-transfected HEK293F cells, human macrophages, and neutrophils, we found that MMP-9 proteolytically cleaves βig-h3. Cleavage leads to the loss of its adhesive property and its release from extracellular matrix proteins, collagen IV, and fibronectin. Spheroids formed by increased cell-cell interactions were observed in βig-h3-transfected HEK293F cells but not in vehicle-transfected HEK293F cells. In human glioma U87MG cells, MMP-9 constitutive overexpression resulted in endogenous βig-h3 cleavage. βig-h3 cleavage by MMP-9 led to increased cell invasion, and βig-h3 knockdown also resulted in increased cell invasion. The βig-h3 fragment cleaved by MMP-9 could bind to the surface of macrophages, and it may play a role as a peptide chemoattractant by inducing macrophage migration via focal adhesion kinase/Src-mediated signal activation. Thus, intact βig-h3 is responsible for cell migration inhibition, cell-cell contact, and cell-extracellular matrix interaction. Experimental evidence indicates that MMP-9-cleaved βig-h3 plays a role in MMP-9-mediated tumor cell and macrophage migration.
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Affiliation(s)
- Yeon Hyang Kim
- Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University, Seoul 120-749, Korea.
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Zhang Z, Zhang ZY, Wu Y, Schluesener HJ. Valproic acid ameliorates inflammation in experimental autoimmune encephalomyelitis rats. Neuroscience 2012; 221:140-50. [PMID: 22800566 DOI: 10.1016/j.neuroscience.2012.07.013] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2012] [Revised: 06/28/2012] [Accepted: 07/06/2012] [Indexed: 11/19/2022]
Abstract
Valproic acid (VPA) is a short-chain branched fatty acid with anti-inflammatory, neuro-protective and axon remodeling effects. Here we have studied effects of VPA in gpMBP(68-84)-induced experimental autoimmune encephalomyelitis (EAE). Both preventive (from Day 0 to Day 18) and therapeutic (from Day 7 to Day 18 or from Day 9 to Day 19) VPA (500 mg/kg, intra-gastric) administration to EAE rats once daily greatly reduced the severity and duration of EAE, and suppressed mRNA levels of interferon-γ (IFN-γ), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and IL-17, matrix metalloproteinase 9 (MMP9), inducible nitric oxide synthase (iNOS) and transcription factor T-bet, but increased levels of IL-4 mRNA in EAE spinal cords. Furthermore, preventive VPA treatment greatly attenuated accumulation of macrophages and lymphocytes in EAE spinal cords. VPA treatment altered the cytokine milieu of lymph nodes, modulating the Th profile from Th1 and Th17 to a profile of Th2 and regulatory T cells. In addition, in vitro study showed that VPA inhibited non-specific lymphocyte proliferation in a dose-dependent manner. In summary, our data demonstrated that VPA could suppress systemic and local inflammation to improve outcome of EAE, suggesting that VPA might be a candidate for treatment of multiple sclerosis.
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MESH Headings
- Animals
- Anti-Inflammatory Agents/therapeutic use
- CD11b Antigen/metabolism
- CD3 Complex/metabolism
- Cell Proliferation/drug effects
- Cytokines/genetics
- Cytokines/metabolism
- Disease Models, Animal
- Ectodysplasins/metabolism
- Encephalomyelitis, Autoimmune, Experimental/chemically induced
- Encephalomyelitis, Autoimmune, Experimental/complications
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Gene Expression Regulation/drug effects
- Inflammation/drug therapy
- Lymphocyte Activation/drug effects
- Macrophages/drug effects
- Macrophages/metabolism
- Male
- Matrix Metalloproteinase 9/genetics
- Matrix Metalloproteinase 9/metabolism
- Nitric Oxide Synthase Type II/genetics
- Nitric Oxide Synthase Type II/metabolism
- RNA, Messenger/metabolism
- Rats
- Rats, Inbred Lew
- Spinal Cord/metabolism
- Spinal Cord/pathology
- T-Box Domain Proteins/genetics
- T-Box Domain Proteins/metabolism
- T-Lymphocytes, Helper-Inducer/drug effects
- T-Lymphocytes, Helper-Inducer/metabolism
- Time Factors
- Valproic Acid/therapeutic use
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Affiliation(s)
- Z Zhang
- Institute of Immunology, Third Military Medical University of PLA, Gaotanyan Main Street 30, Chongqing 400038, People's Republic of China.
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Shukla V, Kumar Shakya A, Dhole TN, Misra UK. Upregulated expression of matrix metalloproteinases and tissue inhibitors of matrix metalloproteinases in BALB/c mouse brain challenged with Japanese encephalitis virus. Neuroimmunomodulation 2012; 19:241-54. [PMID: 22441541 DOI: 10.1159/000335182] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Accepted: 11/16/2011] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND Uncontrolled immune responses in the nervous system are potentially damaging following Japanese encephalitis virus (JEV) infection. Matrix metalloproteinases (MMPs) and their tissue inhibitors (TIMPs) act together to control the proteolysis of extracellular matrix. Disbalances in the MMP/TIMP system during virally induced neurodegenerative processes and inflammations are responsive to changes in the progression of diseases. METHODS The expression of MMP-2, MMP-7, MMP-9, TIMP-1, and TIMP-3 in JEV-infected mouse brain was analyzed by RT-PCR for semiquantitation and ELISA for estimation of protein along with brain histopathology at different days postinoculation (dpi). Gelatin gel zymography was performed for MMP-2 and MMP-9 activities. RESULTS In the virus-infected group, expression of MMP-2, MMP-7, MMP-9, TIMP-1, and TIMP-3 was found to be increased from 1 dpi to 6 dpi as compared to controls by both RT-PCR and ELISA. The expressions of MMPs and TIMPs at mRNA and protein levels were in concordance with each other. Post hoc multiple comparison analysis between days revealed that, in the virus-infected groups, significant increases (p < 0.05) in MMP and TIMP levels were observed between various dpi at both mRNA and protein levels. Only the MMP-7 protein level at 6 dpi was not significant compared to 5 dpi (p = 0.99). CONCLUSION Overexpression of MMPs and TIMPs is associated with disease severity in the central nervous system (CNS) during JEV infection. Our results showed that JEV infection can alter the expression of MMPs and TIMPs in the CNS. Thus, assessing these important immune mediators in CNS infection appears to play an important role in the development of symptoms and may help to understand the JEV-induced neurological disorders. More studies are required on this important enzymatic system to study their role in immune mediated pathogenesis.
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Affiliation(s)
- Vibha Shukla
- Department of Microbiology, Sanjay Gandhi Postgraduate Institute of Medical Sciences, Lucknow, India
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Molecular cloning and characterization of a matrix metalloproteinase, from Caenorhabditis elegans: employed to identify homologous protein from Angiostrongylus cantonensis. Parasitol Res 2011; 110:2001-12. [DOI: 10.1007/s00436-011-2729-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2011] [Accepted: 11/18/2011] [Indexed: 10/14/2022]
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Human matrix metalloproteinases: an ubiquitarian class of enzymes involved in several pathological processes. Mol Aspects Med 2011; 33:119-208. [PMID: 22100792 DOI: 10.1016/j.mam.2011.10.015] [Citation(s) in RCA: 164] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 10/29/2011] [Indexed: 02/07/2023]
Abstract
Human matrix metalloproteinases (MMPs) belong to the M10 family of the MA clan of endopeptidases. They are ubiquitarian enzymes, structurally characterized by an active site where a Zn(2+) atom, coordinated by three histidines, plays the catalytic role, assisted by a glutamic acid as a general base. Various MMPs display different domain composition, which is very important for macromolecular substrates recognition. Substrate specificity is very different among MMPs, being often associated to their cellular compartmentalization and/or cellular type where they are expressed. An extensive review of the different MMPs structural and functional features is integrated with their pathological role in several types of diseases, spanning from cancer to cardiovascular diseases and to neurodegeneration. It emerges a very complex and crucial role played by these enzymes in many physiological and pathological processes.
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An alternate perspective on the roles of TIMPs and MMPs in pathology. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 180:12-6. [PMID: 22033229 DOI: 10.1016/j.ajpath.2011.09.008] [Citation(s) in RCA: 146] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 06/28/2011] [Revised: 08/26/2011] [Accepted: 09/19/2011] [Indexed: 01/06/2023]
Abstract
Tissue inhibitors of metalloproteinases (TIMPs) are pleiotropic extracellular proteins. TIMPs are recognized as endogenous regulators of matrix metalloproteinases (MMPs), a large family of extracellular enzymes with proteolytic activities that participate in cellular homeostasis, adaptation, and tissue remodeling. In addition to their roles as endogenous potent MMP inhibitors, accumulating evidence indicates important physiological roles for TIMPs that are independent of their ability to block MMP activities. For instance, MMP-independent actions of TIMP-1 in the central nervous system have been implicated in synaptic plasticity, neuroprotection, oncogenesis, and oligodendrocyte differentiation. Expression of TIMP-1 is dramatically increased in response to a variety of injurious and inflammatory insults. In the context of disease pathogenesis, MMP and TIMP expression are interpreted with respect to the proteolytic consequences of increased MMP/TIMP ratios. Here, we provide an alternative perspective on the homeostatic balance of TIMP and MMP proteins, whereby consideration is given to the possible role of MMPs as cognate inhibitors of the signaling functions of TIMPs. Thus, MMPs may regulate the receptor-mediated actions of TIMPs, inasmuch as TIMPs are themselves inhibitors of MMP-mediated proteolytic activities. This broader view reflects our emerging understanding that TIMP signaling and MMP inhibition represent two important functions of TIMPs that have the potential to affect tissue pathology.
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Astrocytic tissue inhibitor of metalloproteinase-1 (TIMP-1) promotes oligodendrocyte differentiation and enhances CNS myelination. J Neurosci 2011; 31:6247-54. [PMID: 21508247 DOI: 10.1523/jneurosci.5474-10.2011] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Tissue inhibitor of metalloproteinase-1 (TIMP-1) is an extracellular protein and endogenous regulator of matrix metalloproteinases (MMPs) secreted by astrocytes in response to CNS myelin injury. We have previously reported that adult TIMP-1 knock-out (KO) mice exhibit poor myelin repair following demyelinating injury. This observation led us to hypothesize a role for TIMP-1 in oligodendrogenesis and CNS myelination. Herein, we demonstrate that compact myelin formation is significantly delayed in TIMP-1 KO mice, a situation that coincided with dramatically reduced numbers of white matter astrocytes in the developing CNS. Analysis of differentiation in CNS progenitor cells (neurosphere) cultures from TIMP-1 KO mice revealed a specific deficit of NG2(+) oligodendrocyte progenitor cells. Application of recombinant murine TIMP-1 (rmTIMP-1) to TIMP-1 KO neurosphere cultures evoked a dose-dependent increase in NG2(+) cell numbers, while treatment with GM6001, a potent broad-spectrum MMP inhibitor did not. Similarly, administration of rmTIMP-1 to A2B5(+) immunopanned oligodendrocyte progenitors significantly increased the number of differentiated O1(+) oligodendrocytes, while antisera to TIMP-1 reduced oligodendrocyte numbers. We also determined that A2B5(+) oligodendrocyte progenitors grown in conditioned media derived from TIMP-1 KO primary glial cultures resulted in reduced differentiation of mature O1(+) oligodendrocytes. Finally, we report that addition of rmTIMP-1 to primary glial cultures resulted in a dose-dependent proliferative response of astrocytes. Together, these findings describe a previously uncharacterized role for TIMP-1 in the regulation of oligodendrocytes and astrocytes during development and provide a novel function for TIMP-1 on myelination in the developing CNS.
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Larochelle C, Alvarez JI, Prat A. How do immune cells overcome the blood-brain barrier in multiple sclerosis? FEBS Lett 2011; 585:3770-80. [PMID: 21550344 DOI: 10.1016/j.febslet.2011.04.066] [Citation(s) in RCA: 260] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 04/26/2011] [Accepted: 04/27/2011] [Indexed: 11/17/2022]
Abstract
The presence of the blood-brain barrier (BBB) restricts the movement of soluble mediators and leukocytes from the periphery to the central nervous system (CNS). Leukocyte entry into the CNS is nonetheless an early event in multiple sclerosis (MS), an inflammatory disorder of the CNS. Whether BBB dysfunction precedes immune cell infiltration or is the consequence of perivascular leukocyte accumulation remains enigmatic, but leukocyte migration modifies BBB permeability. Immune cells of MS subjects express inflammatory cytokines, reactive oxygen species (ROS) and enzymes that can facilitate their migration to the CNS by influencing BBB function, either directly or indirectly. In this review, we describe how immune cells from the peripheral blood overcome the BBB and promote CNS inflammation in MS through BBB disruption.
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Affiliation(s)
- Catherine Larochelle
- Neuroimmunology Research Laboratory, Center of Excellence in Neuromics, CRCHUM, Notre-Dame Hospital, Faculty of Medicine, Université de Montréal, Montréal, Québec, Canada
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Initiation and progression of axonopathy in experimental autoimmune encephalomyelitis. J Neurosci 2010; 29:14965-79. [PMID: 19940192 DOI: 10.1523/jneurosci.3794-09.2009] [Citation(s) in RCA: 112] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Axonal loss is the principal cause of chronic disability in multiple sclerosis and experimental autoimmune encephalomyelitis (EAE). In C57BL/6 mice with EAE induced by immunization with myelin oligodendrocyte glycoprotein peptide 35-55, the first evidences of axonal damage in spinal cord were in acute subpial and perivascular foci of infiltrating neutrophils and lymphocytes and included intra-axonal accumulations of the endovesicular Toll-like receptor TLR8, and the inflammasome protein NAcht leucine-rich repeat protein 1 (NALP1). Later in the course of this illness, focal inflammatory infiltrates disappeared from the spinal cord, but there was persistent activation of spinal cord innate immunity and progressive, bilaterally symmetric loss of small-diameter corticospinal tract axons. These results support the hypothesis that both contact-dependent and paracrine interactions of systemic inflammatory cells with axons and an innate immune-mediated neurodegenerative process contribute to axonal loss in this multiple sclerosis model.
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The blood-brain and the blood-cerebrospinal fluid barriers: function and dysfunction. Semin Immunopathol 2009; 31:497-511. [PMID: 19779720 DOI: 10.1007/s00281-009-0177-0] [Citation(s) in RCA: 489] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 08/13/2009] [Indexed: 10/20/2022]
Abstract
The central nervous system (CNS) is tightly sealed from the changeable milieu of blood by the blood-brain barrier (BBB) and the blood-cerebrospinal fluid (CSF) barrier (BCSFB). While the BBB is considered to be localized at the level of the endothelial cells within CNS microvessels, the BCSFB is established by choroid plexus epithelial cells. The BBB inhibits the free paracellular diffusion of water-soluble molecules by an elaborate network of complex tight junctions (TJs) that interconnects the endothelial cells. Combined with the absence of fenestrae and an extremely low pinocytotic activity, which inhibit transcellular passage of molecules across the barrier, these morphological peculiarities establish the physical permeability barrier of the BBB. In addition, a functional BBB is manifested by a number of permanently active transport mechanisms, specifically expressed by brain capillary endothelial cells that ensure the transport of nutrients into the CNS and exclusion of blood-borne molecules that could be detrimental to the milieu required for neural transmission. Finally, while the endothelial cells constitute the physical and metabolic barrier per se, interactions with adjacent cellular and acellular layers are prerequisites for barrier function. The fully differentiated BBB consists of a complex system comprising the highly specialized endothelial cells and their underlying basement membrane in which a large number of pericytes are embedded, perivascular antigen-presenting cells, and an ensheathment of astrocytic endfeet and associated parenchymal basement membrane. Endothelial cell morphology, biochemistry, and function thus make these brain microvascular endothelial cells unique and distinguishable from all other endothelial cells in the body. Similar to the endothelial barrier, the morphological correlate of the BCSFB is found at the level of unique apical tight junctions between the choroid plexus epithelial cells inhibiting paracellular diffusion of water-soluble molecules across this barrier. Besides its barrier function, choroid plexus epithelial cells have a secretory function and produce the CSF. The barrier and secretory function of the choroid plexus epithelial cells are maintained by the expression of numerous transport systems allowing the directed transport of ions and nutrients into the CSF and the removal of toxic agents out of the CSF. In the event of CNS pathology, barrier characteristics of the blood-CNS barriers are altered, leading to edema formation and recruitment of inflammatory cells into the CNS. In this review we will describe current knowledge on the cellular and molecular basis of the functional and dysfunctional blood-CNS barriers with focus on CNS autoimmune inflammation.
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Role of the extracellular matrix in lymphocyte migration. Cell Tissue Res 2009; 339:47-57. [PMID: 19697064 DOI: 10.1007/s00441-009-0853-3] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2009] [Accepted: 07/27/2009] [Indexed: 12/21/2022]
Abstract
The extracellular matrix (ECM) exists in various biochemical and structural forms that can act either as a barrier to migrating leukocytes, in the case of basement membranes, or provide a physical scaffold supporting or guiding migration (interstitial matrix). This review focuses on basement membranes and our current knowledge of the way that leukocytes transmigrate this protein barrier, with emphasis on T lymphocytes. Recent data suggest that the classical concept of cell-matrix adhesion requires revision with respect to leukocyte-ECM interactions. Whereas specific receptors may be required for leukocyte recognition of ECM molecules or three-dimensional structural domains, the role of adhesion in migration as perceived from the traditional studies of adherent cell-ECM interactions is less clear. Further, the indirect effects of ECM such as the binding and presentation of cytokines or chemotactic factors may more profoundly influence the directed migration of normally non-adherent leukocytes than the migration of adherent cells such as epithelial cells or fibroblasts. Proteases (in particular matrix metalloproteinases) released at sites of inflammation can selectively process ECM, cell surface molecules or soluble factors, which may result in the release of bioactive fragments that can function as chemoattractants for different leukocyte subsets or may modulate the activity/function of resident mesenchymal and immune cells. Current findings suggest that different leukocyte types employ different mechanisms to migrate across or through the ECM; this might be determined by the composition and organization of the ECM itself.
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Keating P, O'Sullivan D, Tierney JB, Kenwright D, Miromoeini S, Mawasse L, Brombacher F, La Flamme AC. Protection from EAE by IL-4Ralpha(-/-) macrophages depends upon T regulatory cell involvement. Immunol Cell Biol 2009; 87:534-45. [PMID: 19488061 DOI: 10.1038/icb.2009.37] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The administration of Th2 cytokines or immune deviation to a Th2 phenotypic response has been shown to protect against the autoimmune pathology of experimental autoimmune encephalomyelitis (EAE). To better understand the function of Th2 cytokines in the induction stage of EAE in the absence of an overt Th2 response, we immunized IL-4 receptor alpha-deficient (IL-4Ralpha(-/-)) mice, which are unable to respond to either IL-4 or IL-13. Contrary to expectations, mice lacking IL-4Ralpha had a lower incidence of EAE and a delayed onset compared to WT BALB/c mice; however, this delay did not correlate to an alteration in the Th1/Th17 cytokine balance. Instead, IL-4Ralpha-responsive macrophages were essential promoters of disease as macrophage-specific IL-4Ralpha-deficient (LysM(cre)IL-4Ralpha(-/lox)) mice were protected from EAE. The protection afforded by IL-4Ralpha-deficiency was not due to IL-10-, IFN-gamma-, NO- or IDO-mediated suppression of T-cell responses but was dependent upon the presence of regulatory T cells (Tregs). This investigation highlights the importance of macrophages and Tregs in regulating central nervous system inflammation and demonstrates that macrophages activated in the absence of Th2 cytokines can promote disease suppression by Tregs.
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Affiliation(s)
- Paula Keating
- School of Biological Sciences, Victoria University of Wellington, Wellington, New Zealand
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Immunohistochemical analysis of MMP-9, MMP-2 and TIMP-1, TIMP-2 expression in the central nervous system following infection with viral and bacterial meningitis. Folia Histochem Cytobiol 2009; 46:437-42. [PMID: 19141395 DOI: 10.2478/v10042-008-0058-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Matrix metalloproteinases (MMPs) are capable of degrading components of the basal lamina of cerebral vessels, thereby disrupting the blood-brain barrier and inducing leukocyte recruitment. This study provides comprehensive information regarding the cell specificity of matrix metalloproteinases (MMP-2, MMP-9) and their binding tissue inhibitors (TIMP-1, TIMP-2) in the central nervous system during viral and bacterial meningitis. Specifically, we evaluated the immunoreactivity of MMPs and TIMPs in various cell types in brain parenchyma and meninges obtained from autopsy tissues. We found that a higher proportion of endothelial cells were positive for MMP-9 during meningitis when compared to controls. In addition, the immunoreactivity of MMP-9 decreased and the immunoreactivity of TIMP-1 increased in astrocytes upon infection. Furthermore, the results of this study revealed that mononuclear cells were highly immunoreactive for TIMP-1, TIMP-2 and MMP-9 during viral meningitis and that the expression of TIMPs in polymorphonuclear cells was even higher during bacterial meningitis. Taken together the results of this study indicated that the central nervous system resident cells and inflammatory infiltrates contribute to MMPs activity and that the expression patterns vary between cell types and in response to viral and bacterial meningitis.
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Folgueras AR, Fueyo A, García-Suárez O, Cox J, Astudillo A, Tortorella P, Campestre C, Gutiérrez-Fernández A, Fanjul-Fernández M, Pennington CJ, Edwards DR, Overall CM, López-Otín C. Collagenase-2 Deficiency or Inhibition Impairs Experimental Autoimmune Encephalomyelitis in Mice. J Biol Chem 2008; 283:9465-74. [DOI: 10.1074/jbc.m709522200] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Alvarez JI, Teale JM. Multiple expression of matrix metalloproteinases in murine neurocysticercosis: Implications for leukocyte migration through multiple central nervous system barriers. Brain Res 2008; 1214:145-58. [PMID: 18466882 DOI: 10.1016/j.brainres.2008.03.036] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2008] [Revised: 03/08/2008] [Accepted: 03/10/2008] [Indexed: 11/28/2022]
Abstract
During the course of murine neurocysticercosis (NCC), disruption of the unique protective barriers in the central nervous system (CNS) is evidenced by extravasation of leukocytes. This process varies according to the anatomical sites and diverse vascular beds analyzed. To examine mechanisms involved in the observed differences, the expression and activity of eight matrix metalloproteinases (MMPs) were analyzed in a murine model of NCC. The mRNA expression of the MMPs studied was upregulated as a result of infection, and active MMPs were mainly detected in leukocytes migrating into the brain. Polarized expression and gelatinolytic activity of several MMPs were identified in immune cells extravasating pial vessels as early as 1 day post infection. In contrast, leukocytes expressing active MMPs and extravasating parenchymal vessels were not observed until 5 weeks post infection. In ventricular areas, most of the MMP activity was detected in leukocytes traversing the ependyma from leptomeningeal infiltrates. In addition, immune cells continued to express active MMPs after exiting vessels suggesting that enzymatic activity of MMPs is not just required for diapedesis. These results correlate with our previous studies showing differential kinetics in the disruption of the CNS barriers upon infection and help document the important role of MMPs during leukocyte infiltration and inflammation.
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Affiliation(s)
- Jorge I Alvarez
- Department of Microbiology and Immunology, University of Texas Health Science Center at San Antonio, San Antonio, TX 78229, USA
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The multiple sclerosis degradome: enzymatic cascades in development and progression of central nervous system inflammatory disease. Curr Top Microbiol Immunol 2008; 318:133-75. [PMID: 18219817 DOI: 10.1007/978-3-540-73677-6_6] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
An array of studies implicate different classes of protease and their endogenous inhibitors in multiple sclerosis (MS) pathogenesis based on expression patterns in MS lesions, sera, and/or cerebrospinal fluid (CSF). Growing evidence exists regarding their mechanistic roles in inflammatory and neurodegenerative aspects of this disease. Proteolytic events participate in demyelination, axon injury, apoptosis, and development of the inflammatory response including immune cell activation and extravasation, cytokine and chemokine activation/inactivation, complement activation, and epitope spreading. The potential significance of proteolytic activity to MS therefore relates not only to their potential use as important biomarkers of disease activity, but additionally as prospective therapeutic targets. Experimental data indicate that understanding the net physiological consequence of altered protease levels in MS development and progression necessitates understanding protease activity in the context of substrates, endogenous inhibitors, and proteolytic cascade interactions, which together make up the MS degradome. This review will focus on evidence regarding the potential physiologic role of those protease families already identified as markers of disease activity in MS; that is, the metallo-, serine, and cysteine proteases.
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Milward E, Kim KJ, Szklarczyk A, Nguyen T, Melli G, Nayak M, Deshpande D, Fitzsimmons C, Hoke A, Kerr D, Griffin JW, Calabresi PA, Conant K. Cleavage of myelin associated glycoprotein by matrix metalloproteinases. J Neuroimmunol 2007; 193:140-8. [PMID: 18063113 DOI: 10.1016/j.jneuroim.2007.11.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2007] [Revised: 09/12/2007] [Accepted: 11/02/2007] [Indexed: 01/03/2023]
Abstract
Derivative myelin associated glycoprotein (dMAG) results from proteolysis of transmembrane MAG and can inhibit axonal growth. We have tested the ability of certain matrix metalloproteinases (MMPs) elevated with inflammatory and demyelinating diseases to cleave MAG. We show MMP-2, MMP-7 and MMP-9, but not MMP-1, cleave recombinant human MAG. Cleavage by MMP-7 occurs at Leu 509, just distal to the transmembrane domain and, to a lesser extent, at Met 234. We also show that MMP-7 cleaves MAG expressed on the external surface of CHO cells, releasing fragments that accumulate in the medium over periods of up to 48 h or more and that are able to inhibit outgrowth by dorsal root ganglion (DRG) neurons. We conclude that MMPs may have the potential both to disrupt MAG dependent axon-glia communication and to generate bioactive fragments that can inhibit neurite growth.
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Affiliation(s)
- Elizabeth Milward
- School of Biomedical Sciences, The University of Newcastle and the Hunter Medical Research Institute, Callaghan, New South Wales 2308, Australia
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Yong VW, Zabad RK, Agrawal S, Goncalves Dasilva A, Metz LM. Elevation of matrix metalloproteinases (MMPs) in multiple sclerosis and impact of immunomodulators. J Neurol Sci 2007; 259:79-84. [PMID: 17382965 DOI: 10.1016/j.jns.2006.11.021] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2006] [Accepted: 11/01/2006] [Indexed: 12/21/2022]
Abstract
The matrix metalloproteinases (MMPs) are implicated in the pathology of multiple sclerosis (MS). This review summarizes the consequences of upregulation of MMP members in MS as well as in an animal model of the disease, experimental autoimmune encephalomyelitis (EAE). The pathogenic roles of MMPs are considered, especially in the transmigration of leukocytes into the CNS. We review the evidence that interferon-beta, an immunomodulator that is commonly used in MS, affects MMP expression in the disease. The potential of minocycline as a therapy in MS, based on its activity as an MMP inhibitor, is discussed. Besides affecting MMPs, minocycline may have other actions that help account for its possible utility in MS.
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Affiliation(s)
- V Wee Yong
- Hotchkiss Brain Institute and Department of Clinical Neurosciences, University of Calgary, Calgary, Alberta, Canada.
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Crocker SJ, Whitmire JK, Frausto RF, Chertboonmuang P, Soloway PD, Whitton JL, Campbell IL. Persistent macrophage/microglial activation and myelin disruption after experimental autoimmune encephalomyelitis in tissue inhibitor of metalloproteinase-1-deficient mice. THE AMERICAN JOURNAL OF PATHOLOGY 2007; 169:2104-16. [PMID: 17148673 PMCID: PMC1762490 DOI: 10.2353/ajpath.2006.060626] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Increased leukocyte trafficking into the parenchyma during inflammatory responses in the central nervous system (CNS) is facilitated by the extracellular proteolytic activities of matrix metalloproteinases that are regulated, in part, by the endogenous tissue inhibitors of metalloproteinases (TIMPs). In experimental autoimmune encephalomyelitis (EAE), TIMP-1 gene expression is induced in astrocytes surrounding inflammatory lesions in the CNS. The physiological importance of this temporal and spatial relationship is not clear. Herein, we have addressed the functional role of TIMP-1 in a myelin oligodendrocyte glycoprotein (MOG35-55)-induced model of EAE using TIMP-1-deficient (TIMP-1-/-) C57BL/6 mice. Although CD4+ T-cell immune responses to myelin in wild-type (WT) and TIMP-1-/- mice were similar, analysis of CNS tissues from TIMP-1-/- mice after EAE revealed more severe myelin pathology than that of WT mice. This disruption of myelin was associated with both increased lymphocyte infiltration and microglial/macrophage accumulation in the brain parenchyma. These findings suggest that induction of TIMP-1 by astrocytes during EAE in WT mice represents an inherent cytoprotective response that mitigates CNS myelin injury through the regulation of both immune cell infiltration and microglial activation.
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Affiliation(s)
- Stephen J Crocker
- The Molecular and Integrative Neurosciences Department, The Scripps Research Institute, SP30-2110, 10550 North Torrey Pines Rd., La Jolla, CA 92037, USA.
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Agrawal SM, Yong VW. Immunopathogenesis of multiple sclerosis. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2007; 79:99-126. [PMID: 17531839 DOI: 10.1016/s0074-7742(07)79005-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Multiple sclerosis (MS) is considered an immune-mediated disorder in which immune cells cross the blood-brain barrier to enter the central nervous system (CNS) wherein they augment the neuropathology of the disease. This chapter discusses the role of various immune cell types that contribute to the development and progression of MS. Specifically, the role of T cells, antigen-presenting cells, and components of the innate immune system such as macrophages, B cells, and the complement system are discussed. The involvement of CNS-specific cells such as microglia, astrocytes, and neurons in MS are discussed and the immunosuppressive role of regulatory T cells is considered. We introduce the involvement of chemokines and matrix metalloproteinases which helps recruit immune cells into the CNS in MS. Although the causes of MS are unknown, various factors such as genetic influences, environmental effects, and involvement of infectious agents as potential contributors to MS immune dysfunctions are also considered. With this background, we discuss the mechanisms of the immunomodulators that are used to treat MS.
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Affiliation(s)
- Smriti M Agrawal
- Department of Clinical Neuroscience, University of Calgary Calgary, Alberta T2N 4N1, Canada
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