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Hossain R, Quispe C, Herrera-Bravo J, Beltrán JF, Islam MT, Shaheen S, Cruz-Martins N, Martorell M, Kumar M, Sharifi-Rad J, Ozdemir FA, Setzer WN, Alshehri MM, Calina D, Cho WC. Neurobiological Promises of the Bitter Diterpene Lactone Andrographolide. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2022; 2022:3079577. [PMID: 35154564 PMCID: PMC8825670 DOI: 10.1155/2022/3079577] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 11/21/2021] [Accepted: 01/18/2022] [Indexed: 12/27/2022]
Abstract
Andrographolide (ANDRO), a bitter diterpene lactone found in Andrographis paniculata (Burm.f.) Nees, possesses several biological effects such as antioxidant, anti-inflammatory, and organo-protective effects. Scientific reports suggest that it also has neuroprotective capacity in various test systems. The purpose of this review was to synthesize the neuropharmacological properties of ANDRO and highlight the molecular mechanisms of action that highlight these activities. A careful search was done in PubMed and Google Scholar databases using specific keywords. Findings suggest that ANDRO possess neuroprotective, analgesic, and antifatigue effects. Prominent effects were stated on neuro-inflammation, cerebral ischemia, Alzheimer's and Parkinson's diseases, multiple sclerosis, and brain cancer in mice and rats. Furthermore, ANDRO and its derivatives can enhance memory and learning capacity in experimental animals (rats) without causing any toxicity in the brain. Thus, ANDRO may be one of the most promising plant-based psychopharmacological lead compounds for new drug development.
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Affiliation(s)
- Rajib Hossain
- 1Department of Pharmacy, Life Science Faculty, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalga nj-8100, Bangladesh
| | - Cristina Quispe
- 2Facultad de Ciencias de la Salud, Universidad Arturo Prat, Avda. Arturo Prat 2120, Iquique 1110939, Chile
| | - Jesús Herrera-Bravo
- 3Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad Santo Tomas, Chile
- 4Center of Molecular Biology and Pharmacogenetics, Scientific and Technological Bioresource Nucleus, Universidad de La Frontera, Temuco 4811230, Chile
| | - Jorge F. Beltrán
- 5Department of Chemical Engineering, Faculty of Engineering and Sciences, Universidad de La Frontera, Temuco, Chile
| | - Muhammad Torequl Islam
- 1Department of Pharmacy, Life Science Faculty, Bangabandhu Sheikh Mujibur Rahman Science and Technology University, Gopalga nj-8100, Bangladesh
| | | | - Natália Cruz-Martins
- 7Faculty of Medicine, University of Porto, Alameda Professor Hernâni Monteiro, 4200-319 Porto, Portugal
- 8Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal
- 9Institute of Research and Advanced Training in Health Sciences and Technologies (CESPU), Rua Central de Gandra, 1317, 4585-116 Gandra, PRD, Portugal
- 10TOXRUN-Toxicology Research Unit, University Institute of Health Sciences, CESPU, CRL, 4585-116 Gandra, Portugal
| | - Miquel Martorell
- 11Department of Nutrition and Dietetics, Faculty of Pharmacy, And Centre for Healthy Living, University of Concepción, 4070386 Concepción, Chile
- 12Universidad de Concepción, Unidad de Desarrollo Tecnológico, UDT, Concepción 4070386, Chile
| | - Manoj Kumar
- 13Chemical and Biochemical Processing Division, ICAR-Central Institute for Research on Cotton Technology, 400019, Mumbai, India
| | | | - Fethi Ahmet Ozdemir
- 15Department of Molecular Biology and Genetics, Faculty of Science and Art, Bingol University, Bingol 1200, Turkey
| | - William N. Setzer
- 16Department of Chemistry, University of Alabama in Huntsville, Huntsville, AL 35899, USA
| | - Mohammed M. Alshehri
- 17Pharmaceutical Care Department, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
| | - Daniela Calina
- 18Department of Clinical Pharmacy, University of Medicine and Pharmacy of Craiova, 200349 Craiova, Romania
| | - William C. Cho
- 19Department of Clinical Oncology, Queen Elizabeth Hospital, Kowloon, Hong Kong
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2
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Hoxha M, Spahiu E, Prendi E, Zappacosta B. A Systematic Review on the Role of Arachidonic Acid Pathway in Multiple Sclerosis. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2020; 21:160-187. [PMID: 32842948 DOI: 10.2174/1871527319666200825164123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 06/28/2020] [Accepted: 07/17/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND & OBJECTIVE Multiple sclerosis (MS) is an inflammatory neurodegenerative disease characterized by destruction of oligodendrocytes, immune cell infiltration and demyelination. Inflammation plays a significant role in MS, and the inflammatory mediators such as eicosanoids, leukotrienes, superoxide radicals are involved in pro-inflammatory responses in MS. In this systematic review we tried to define and discuss all the findings of in vivo animal studies and human clinical trials on the potential association between arachidonic acid (AA) pathway and multiple sclerosis. METHODS A systematic literature search across Pubmed, Scopus, Embase and Cochrane database was conducted. This systematic review was performed according to PRISMA guidelines. RESULTS A total of 146 studies were included, of which 34 were conducted in animals, 58 in humans, and 60 studies reported the role of different compounds that target AA mediators or their corresponding enzymes/ receptors, and can have a therapeutic effect in MS. These results suggest that eicosanoids have significant roles in experimental autoimmune encephalomyelitis (EAE) and MS. The data from animal and human studies elucidated that PGI2, PGF2α, PGD2, isoprostanes, PGE2, PLA2, LTs are increased in MS. PLA2 inhibition modulates the progression of the disease. PGE1 analogues can be a useful option in the treatment of MS. CONCLUSIONS All studies reported the beneficial effects of COX and LOX inhibitors in MS. The hybrid compounds, such as COX-2 inhibitors/TP antagonists and 5-LOX inhibitors can be an innovative approach for multiple sclerosis treatment. Future work in MS should shed light in synthesizing new compounds targeting arachidonic acid pathway.
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Affiliation(s)
- Malvina Hoxha
- Department of Chemical-Toxicological and Pharmacological Evaluations of Drugs, Faculty of Pharmacy, Catholic University Our Lady of Good Counsel, Rruga Dritan Hoxha, Tirana. Albania
| | | | - Emanuela Prendi
- Catholic University Our Lady of Good Counsel, Department of Biomedical Sciences, Rruga Dritan Hoxha, Tirana. Albania
| | - Bruno Zappacosta
- Department of Chemical-Toxicological and Pharmacological Evaluations of Drugs, Faculty of Pharmacy, Catholic University Our Lady of Good Counsel, Rruga Dritan Hoxha, Tirana. Albania
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3
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Karlik SJ, Stavraky RT, Hall ED. Comparison of Tirilazad Mesylate (U-74006F) and Methyl Prednisolone Sodium Succinate Treatments in Experimental Allergic Encephalomyelitis in the Guinea Pig. Mult Scler 2018. [DOI: 10.1177/135245859600100408] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The effects of the non-glucocortioid 21-aminosteroid, tirilazad mesylate (U-74006F), on MRI and clinical findings in guinea pigs with experimental allergic encephalomyelitis were compared to treatment with methylprednisolone sodium succinate (MPSS). A dose response experiment for U-74006F was performed 1, 3 and 10 mg/kg/day IP on day 0–12 after immunization. Additionally, the 3 mg/kg/day IP dose was extended to 24 and 35 days. MPSS was given in three different protocols at doses ranging from 0.8 to 3.2 mg/kg/day. Abnormalities in T2-weighted images were assessed as measures of edema and inflammation and gadolinium-DTPA enhanced TI-weighted images were used to determine blood-brain barrier integrity. U-74006F improved the clinical status at doses of 3 and 10 mg/kg. For example, maximum clinical score was halved at 10 mg/kg/day (P < 0.01). The presence of gadolinium-DTPA in the parenchyma was also decreased at 3 and 10 mg/kg/day U-74006F although maximum MRI scores were decreased only in the 10 mg/kg U-74006F group. Clinical disease suppression seen with 3 mg/kg treatment on days 0–12 reverted to control at > 24 days of dosing. MPSS treatment considerably worsened the clinical outcome of EAE Mean clinical scores for vehicle and the highest MPSS dose were 0.94 ± 0.66 versus 2.64 ± 1.49 (P < 0.05). The combination of decreased T2-weighted abnormalities, clinical signs and gadolinium-DTPA permeation in the U-74006F treated animals suggested protection of the blood–brain barrier without the severe glucocorticoid effects associated with steroid therapy.
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Affiliation(s)
- SJ Karlik
- Department of Diagnostic Radiology and Nuclear Medicine, University of Western Ontario, London, Ontario, Canada
- Department of Physiology and University of Western Ontario, London, Ontario, Canada
- Department of Clinical Neurological Sciences, University of Western Ontario, London, Ontario, Canada
| | - RT Stavraky
- Department of Physiology and University of Western Ontario, London, Ontario, Canada
| | - ED Hall
- Department of Central Nervous System Diseases Research, The Upjohn Company, Kalamazoo, Michigan, USA
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4
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5
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Badawi AH, Siahaan TJ. Immune modulating peptides for the treatment and suppression of multiple sclerosis. Clin Immunol 2012; 144:127-38. [PMID: 22722227 DOI: 10.1016/j.clim.2012.05.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 05/25/2012] [Accepted: 05/28/2012] [Indexed: 12/17/2022]
Abstract
Multiple sclerosis (MS) is a neurodegenerative disease in which the immune system recognizes proteins of the myelin sheath as antigenic, thus initiating an inflammatory reaction in the central nervous system. This leads to demyelination of the axons, breakdown of the blood-brain barrier, and lesion formation. Current therapies for the treatment of MS are generally non-specific and weaken the global immune system, thus making the individual susceptible to opportunistic infections. Antigenic peptides and their derivatives are becoming more prevalent for investigation as therapeutic agents for MS because they possess immune-specific characteristics. In addition, other peptides that target vital components of the inflammatory immune response have also been developed. Therefore, the objectives of this review are to (a) summarize the immunological basis for the development of MS, (b) discuss specific and non-specific peptides tested in EAE and in humans, and (c) briefly address some problems and potential solutions with these novel therapies.
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Affiliation(s)
- Ahmed H Badawi
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, KS 66047, USA
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6
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Du C, Xie X. G protein-coupled receptors as therapeutic targets for multiple sclerosis. Cell Res 2012; 22:1108-28. [PMID: 22664908 DOI: 10.1038/cr.2012.87] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
G protein-coupled receptors (GPCRs) mediate most of our physiological responses to hormones, neurotransmitters and environmental stimulants. They are considered as the most successful therapeutic targets for a broad spectrum of diseases. Multiple sclerosis (MS) is an inflammatory disease that is characterized by immune-mediated demyelination and degeneration of the central nervous system (CNS). It is the leading cause of non-traumatic disability in young adults. Great progress has been made over the past few decades in understanding the pathogenesis of MS. Numerous data from animal and clinical studies indicate that many GPCRs are critically involved in various aspects of MS pathogenesis, including antigen presentation, cytokine production, T-cell differentiation, T-cell proliferation, T-cell invasion, etc. In this review, we summarize the recent findings regarding the expression or functional changes of GPCRs in MS patients or animal models, and the influences of GPCRs on disease severity upon genetic or pharmacological manipulations. Hopefully some of these findings will lead to the development of novel therapies for MS in the near future.
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Affiliation(s)
- Changsheng Du
- Laboratory of Receptor-Based BioMedicine, Shanghai Key Laboratory of Signaling and Disease Research, School of Life Sciences and Technology, Tongji University, Shanghai 200092, China
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7
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Histamine and histamine receptors in pathogenesis and treatment of multiple sclerosis. Neuropharmacology 2010; 59:180-9. [PMID: 20493888 DOI: 10.1016/j.neuropharm.2010.05.005] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Revised: 05/09/2010] [Accepted: 05/17/2010] [Indexed: 01/03/2023]
Abstract
Multiple sclerosis (MS) is an autoimmune disease associated with chronic inflammatory demyelination of the central nervous system (CNS). Due to disease complexity and heterogeneity, its pathogenesis remains unknown and despite extensive studies, specific effective treatments have not yet been developed. The factors behind the initiation of the inflammatory reactions in CNS have not been identified until now. MS is considered as a complex disease depending on genetic as well as environmental factors. Experimental autoimmune encephalomyelitis (EAE) is the preferential experimental rodent model for MS. Histamine [2-(4-imidazole) ethylamine] is a ubiquitous inflammatory mediator of diverse physiological processes including neurotransmission, secretion of pituitary hormones, and regulation of the gastrointestinal and circulatory systems which can modulate immune responses. Histamine functions are mediated through four G-protein coupled receptors that are named H1-H4 receptor. Histamine is implicated as an important factor in pathophysiology of MS and EAE. It has been shown that histamine can change the permeability of blood brain barrier, which leads to elevation of infiltrated cells in CNS and neuroinflammation. In contrast, there are evidence that show the protective role of histamine in MS and its animal model, EAE. In this review, we try to clarify the role of histamine in pathogenesis of MS, as well as we evaluate the efficacy of histamine receptors agonists and antagonists in treatment of this disease.
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8
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Polyunsaturated fatty acids in the pathogenesis and treatment of multiple sclerosis. Br J Nutr 2008; 98 Suppl 1:S46-53. [PMID: 17922959 DOI: 10.1017/s0007114507833010] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Epidemiological, biochemical, animal model and clinical trial data described in this overview strongly suggest that polyunsaturated fatty acids, particularly n-6 fatty acids, have a role in the pathogenesis and treatment of multiple sclerosis (MS). Data presented provides further evidence for a disturbance in n-6 fatty acid metabolism in MS. Disturbance of n-6 fatty acid metabolism and dysregulation of cytokines are shown to be linked and a "proof of concept clinical trial" further supports such a hypothesis. In a randomised double-blind, placebo controlled trial of a high dose and low dose selected GLA (18:3n-6)-rich oil and placebo control, the high dose had a marked clinical effect in relapsing-remitting MS, significantly decreasing the relapse rate and the progression of disease. Laboratory findings paralleled clinical changes in the placebo group in that production of mononuclear cell pro-inflammatory cytokines (TNF-alpha, IL-1beta) was increased and anti-inflammatory TGF-beta markedly decreased with loss of membrane n-6 fatty acids linoleic (18:2n-6) and arachidonic acids (20:4n-6). In contrast there were no such changes in the high dose group. The improvement in disability (Expanded Disability Status Scale) in the high dose suggests there maybe a beneficial effect on neuronal lipids and neural function in MS. Thus disturbed n-6 fatty acid metabolism in MS gives rise to loss of membrane long chain n-6 fatty acids and loss of the anti-inflammatory regulatory cytokine TGF-beta, particularly during the relapse phase, as well as loss of these important neural fatty acids for CNS structure and function and consequent long term neurological deficit in MS.
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9
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Abstract
This review summarises the role that reactive oxygen and nitrogen species play in demyelination, such as that occurring in the inflammatory demyelinating disorders multiple sclerosis and Guillain-Barré syndrome. The concentrations of reactive oxygen and nitrogen species (e.g. superoxide, nitric oxide and peroxynitrite) can increase dramatically under conditions such as inflammation, and this can overwhelm the inherent antioxidant defences within lesions. Such oxidative and/or nitrative stress can damage the lipids, proteins and nucleic acids of cells and mitochondria, potentially causing cell death. Oligodendrocytes are more sensitive to oxidative and nitrative stress in vitro than are astrocytes and microglia, seemingly due to a diminished capacity for antioxidant defence, and the presence of raised risk factors, including a high iron content. Oxidative and nitrative stress might therefore result in vivo in selective oligodendrocyte death, and thereby demyelination. The reactive species may also damage the myelin sheath, promoting its attack by macrophages. Damage can occur directly by lipid peroxidation, and indirectly by the activation of proteases and phospholipase A2. Evidence for the existence of oxidative and nitrative stress within inflammatory demyelinating lesions includes the presence of both lipid and protein peroxides, and nitrotyrosine (a marker for peroxynitrite formation). The neurological deficit resulting from experimental autoimmune demyelinating disease has generally been reduced by trial therapies intended to diminish the concentration of reactive oxygen species. However, therapies aimed at diminishing reactive nitrogen species have had a more variable outcome, sometimes exacerbating disease.
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Affiliation(s)
- K J Smith
- Department of Clinical Neurological Sciences, Guy's, King's and St. Thomas' School of Medicine, London.
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10
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Inflammatory and Infectious Disorders. MAGNETIC RESONANCE OF MYELINATION AND MYELIN DISORDERS 2005. [PMCID: PMC7122499 DOI: 10.1007/3-540-27660-2_78] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
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11
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Strazielle N, Khuth ST, Murat A, Chalon A, Giraudon P, Belin MF, Ghersi-Egea JF. Pro-Inflammatory Cytokines Modulate Matrix Metalloproteinase Secretion and Organic Anion Transport at the Blood-Cerebrospinal Fluid Barrier. J Neuropathol Exp Neurol 2003; 62:1254-64. [PMID: 14692701 DOI: 10.1093/jnen/62.12.1254] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Neuroinflammation and neuroinfection trigger cytokine-mediated responses that include an increase in the cerebrospinal fluid (CSF) levels of pro-inflammatory matrix metalloproteinases (MMPs) and organic anions such as leukotrienes and prostaglandins. The choroid plexus (CP) epithelium forming the interface between the blood and the CSF regulates the CSF concentration of bioactive organic anions and is involved in neuro-immune regulation. We demonstrated that both fourth and lateral ventricle CPs are a source of pro- and active MMP-2 and MMP-9 in the brain. Using a cellular model of the blood-CSF barrier, we showed that a pro-inflammatory cytokine treatment leads to an increase in the choroidal MMP secretion at either the apical or the basolateral membrane, depending on the ventricular origin of the choroidal cells. This effect was not concomitant with an alteration in the structural blood-CSF barrier. Neither was the pool of antioxidant sulfhydryls in the choroidal cells challenged. In contrast, the efficiency of the choroidal epithelium to clear the CSF from organic anions was highly reduced. Thus, during inflammation, the CPs could be one source of MMPs found in the CSF facilitate leucocyte migration by secreting MMPs into the choroidal stroma, and promote the inflammatory process by failing in its ability to clear deleterious compounds from the brain.
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12
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Hollifield RD, Harbige LS, Pham-Dinh D, Sharief MK. Evidence for cytokine dysregulation in multiple sclerosis: peripheral blood mononuclear cell production of pro-inflammatory and anti-inflammatory cytokines during relapse and remission. Autoimmunity 2003; 36:133-41. [PMID: 12911279 DOI: 10.1080/0891693031000089427] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
We investigated circulating anti-inflammatory and pro-inflammatory cytokines, and their ex vivo PBMC production in the absence or presence of the neuroantigens myelin basic protein (MBP) and myelin oligodendrocyte glycoprotein (MOG) and T cell mitogen (PHA) in MS patients in relapse and remission, patients with other neurological disorders (OND) and normal healthy controls. MS patients in relapse exhibited significantly increased PBMC production of TNF-alpha spontaneously compared with MS remission and healthy controls and with MBP compared with MS remission. Patients in relapse had significantly increased spontaneous, PHA- and MBP-induced PBMC IL-1beta production compared with remission MS, and was increased compared (PHA only) with OND and healthy controls. In relapse there was also significantly increased PBMC IFN-gamma production (PHA only) compared with remission and a significantly lower production of biologically active TGF-beta1 (PHA only) compared with remission MS and OND. In contrast, MS patients in remission produced significantly less spontaneous and MBP-induced TNF-alpha, spontaneous, PHA- and MBP-induced IL-1beta and PHA-induced IFN-gamma together with increased production of biologically active TGF-beta1. MOG non-specifically increased PBMC TNF-alpha and IL-1beta production in all groups. Pro-inflammatory cytokines in corresponding plasma samples were undetectable whilst the concentration of biologically active TGF-beta1 was the reverse of ex vivo PBMC findings. The increase in biologically active TGF-beta1 production ex vivo in OND patients, despite active disease, compared with the low level in the MS relapse may indicate a regulatory defect in MS. We conclude that the balance between biologically active TGF-beta1 and the pro-inflammatory TNF-alpha, IL-1beta and IFN-gamma is dysregulated during MS relapse-remission and that normal counter-regulatory mechanisms during the relapse phase are defective.
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Affiliation(s)
- Robert D Hollifield
- Biological Sciences Research Centre, School of Chemical and Life Sciences, University of Greenwich at Medway, Chatham Maritime, Kent ME4 4TB, UK
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13
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Emerson MR, Orentas DM, Lynch SG, LeVine SM. Activation of histamine H2 receptors ameliorates experimental allergic encephalomyelitis. Neuroreport 2002; 13:1407-10. [PMID: 12167763 DOI: 10.1097/00001756-200208070-00012] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Experimental allergic encephalomyelitis (EAE), a model of multiple sclerosis, is an autoimmune, demyelinating disease of the CNS. Pro-inflammatory cytokines (e.g. tumour necrosis factor-alpha (TNF-alpha) and interleukin (IL)-12) and reactive oxygen species are implicated in promoting EAE. Since histamine H(2) receptor activation suppresses production of O(2)*-, TNF-alpha, and IL-12 by inflammatory cells, we tested the hypothesis that dimaprit, an H(2) agonist, would reduce the clinical severity and pathology of EAE. Dimaprit treatment significantly reduced clinical signs compared to vehicle in both C57BL/6 and iNOS deficient EAE mice. Furthermore, dimaprit significantly reduced CNS staining for lectin-positive macrophages and decreased extravasated albumin staining, an indicator of blood-brain barrier leakage. These data provide a rationale for exploring H2 receptor activation for therapeutic value in multiple sclerosis.
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MESH Headings
- Animals
- Dimaprit/pharmacology
- Dimaprit/therapeutic use
- Encephalomyelitis, Autoimmune, Experimental/drug therapy
- Encephalomyelitis, Autoimmune, Experimental/enzymology
- Encephalomyelitis, Autoimmune, Experimental/genetics
- Encephalomyelitis, Autoimmune, Experimental/metabolism
- Female
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Nitric Oxide Synthase/deficiency
- Nitric Oxide Synthase/genetics
- Nitric Oxide Synthase Type II
- Receptors, Histamine H2/metabolism
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Affiliation(s)
- Mitchell R Emerson
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, 3901 Rainbow Boulevard, Kansas City, KS 66160, USA
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14
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Stoy NS. Monocyte/macrophage initiation of organ-specific autoimmunity: the ultimate 'bystander' hypothesis? Med Hypotheses 2002; 58:312-26. [PMID: 12027526 DOI: 10.1054/mehy.2001.1547] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
It is postulated that organ-specific autoimmune diseases could be initiated by dysregulated peripherally activated monocytes/macrophages penetrating into target organs nonspecifically. Failure of regulation of pro-inflammatory monocytes/macrophages might then result in autoimmune disease if secondary over-expansion of pre-existing autoantigen-specific T cell populations occurs in genetically predisposed individuals.
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MESH Headings
- Animals
- Antigen Presentation
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/pathology
- Autoimmune Diseases/immunology
- Autoimmune Diseases/pathology
- Autoimmunity/physiology
- Cell Adhesion
- Cell Movement
- Cytokines/physiology
- Dendritic Cells/immunology
- Dendritic Cells/pathology
- Diabetes Mellitus, Type 1/immunology
- Diabetes Mellitus, Type 1/pathology
- Encephalomyelitis, Autoimmune, Experimental/immunology
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Endothelium, Vascular/physiopathology
- Genetic Predisposition to Disease
- Humans
- Infections/complications
- Infections/immunology
- Inflammation/immunology
- Lymphocyte Subsets/immunology
- Macrophage Activation
- Macrophages/pathology
- Mice
- Mice, Inbred NOD
- Models, Animal
- Models, Immunological
- Monocytes/pathology
- Multiple Sclerosis/immunology
- Multiple Sclerosis/pathology
- Organ Specificity
- Rats
- Rats, Mutant Strains
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Affiliation(s)
- N S Stoy
- Royal Hospital for Neuro-disability, West Hill, Putney, London, UK
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15
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Clark WM, Lutsep HL. Potential of anticytokine therapies in central nervous system ischaemia. Expert Opin Biol Ther 2001; 1:227-37. [PMID: 11727532 DOI: 10.1517/14712598.1.2.227] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Central nervous system (CNS) ischaemia is associated with an acute inflammatory response which appears to potentiate CNS injury, especially following reperfusion. This response includes the release of inflammatory mediators called cytokines including IL-1 and TNF-alpha, which triggers the production of additional cytokines including IL-6 and activates leukocytes which infiltrate into the CNS. Increased expression of cytokines has been demonstrated to occur in the first few hours after CNS ischaemia. Preliminary clinical studies suggest that plasma levels of IL-6 are correlated with functional recovery while brain levels of cytokines have been demonstrated to increase following experimental ischaemia. Although there are no current clinical 'anti-cytokine' treatment studies for stroke, experimental studies modulating IL-1 and TNF-alpha have shown neuroprotection.
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Affiliation(s)
- W M Clark
- Oregon Stroke Center, Dept. of Neurology UHS44, Oregon Health Sciences University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97201, USA.
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16
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Israel ZH, Lossos A, Barak V, Soffer D, Siegal T. Multifocal demyelinative leukoencephalopathy associated with 5-fluorouracil and levamisole. Acta Oncol 2001; 39:117-20. [PMID: 10752665 DOI: 10.1080/028418600431085] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- Z H Israel
- Oregon Health Sciences University, Department of Neurological Surgery, Portland, USA
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17
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Knott C, Stern G, Wilkin GP. Inflammatory regulators in Parkinson's disease: iNOS, lipocortin-1, and cyclooxygenases-1 and -2. Mol Cell Neurosci 2000; 16:724-39. [PMID: 11124893 DOI: 10.1006/mcne.2000.0914] [Citation(s) in RCA: 367] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Degeneration of dopaminergic neurons and focal gliosis are pathological hallmarks of Parkinson's disease and although the brain is described as immune-privileged focal immune reactions surround failing nigral neurons. We examined the cellular distribution of pro- and anti-inflammatory molecules in human parkinsonian and neurologically normal substantia nigra and caudate-putamen postmortem. An up-regulation of nitric oxide synthase- and cyclo-oxygenase-1- and -2-containing amoeboid microglia was found in parkinsonian but not control nigra. Astroglia contained low levels of these molecules in both groups. Lipocortin-1-immunoreactive amoeboid microglia were present within the astrocytic envelope of neurons adjacent to or within glial scars in parkinsonian nigra only. Lipocortin-1 is known to have neuroprotective and anti-inflammatory properties. Up-regulation of nitric oxide synthase is generally associated with neurodestruction whereas prostaglandin synthesis may be either neurodestructive or protective. The balance of these molecules is likely to be decisive in determining neuronal survival or demise.
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Affiliation(s)
- C Knott
- Imperial College of Science, Technology and Medicine, Exhibition Road South, Kensington, London, SW7 2AZ, UK. c.knott.ic.ac.uk
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Abstract
It is proposed that, in addition to genetic factors involved in immune attack on myelin, higher concentrations of nerve growth factor in certain tissues during development determine susceptibility to multiple sclerosis. High early nerve growth factor in some vasculature of spontaneously hypertensive rats increases sympathetic innervation and catecholamine production in these vessels. They become more sensitive than controls to noradrenaline after chemical sympathectomy. Continued exposure to high noradrenaline can result in sympathectomy-like effects, heightening sensitivity to constricting neurotransmitters. Vasoresponses of spontaneously hypertensive rats are impaired with submaximal but not maximal hypoxia. Such a situation in multiple sclerosis patients could result in insufficient blood flow by vasoconstriction until it becomes maximal. Glutamate increase by ischemia and hyperemic release of free radicals could injure neurons, prompting an immune response to myelin proteins in susceptible people. Developmental adaptation to situations requiring lower sympathetic activity might help counteract these effects.
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Miller A, Shapiro S, Gershtein R, Kinarty A, Rawashdeh H, Honigman S, Lahat N. Treatment of multiple sclerosis with copolymer-1 (Copaxone): implicating mechanisms of Th1 to Th2/Th3 immune-deviation. J Neuroimmunol 1998; 92:113-21. [PMID: 9916886 DOI: 10.1016/s0165-5728(98)00191-x] [Citation(s) in RCA: 164] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The synthetic polypeptide copolymer-1 (Cop-1; Copaxone; Glatiramer Acetate) has been recently approved as an effective treatment in relapsing multiple sclerosis (MS). A large body of evidence demonstrates that Cop-1 induces active suppression of CNS-inflammatory disease in animal models. However, Cop-1-mediated suppressor mechanisms have not yet been elucidated in humans. A 12-month open study following clinical and immunological parameters of ten relapsing MS patients treated with Cop-1 is presented. Relapse rates and disability scores (EDSS) were evaluated prior to and after 12 months of treatment. The immunological parameters assessed prior to and at 3 months' interval during treatment included serum levels of soluble IL-2 receptor (sIL-2R) and IL-10 as well as leukocyte cytokine mRNA expression of TNF alpha, IL-4 and TGF-beta. Copaxone treatment was found to lead to a significant reduction in the mean annual relapse rate (from 1.4 prior to treatment to 0.6 during treatment) and stabilization of disability in 90% of the patients. The treatment was accompanied by an elevation of serum IL-10 levels, suppression of the pro-inflammatory cytokine TNF alpha mRNA, and an elevation of the anti-inflammatory cytokines TGF-beta and IL-4 mRNAs in PBLs. These results suggest that the beneficial clinical effects of Copaxone in MS patients may be attributed to changes in activation of T cell subsets and a shift from Th1 to Th2/Th3 cytokine profile, probably leading to Cop-1-driven mechanisms of bystander suppression.
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Affiliation(s)
- A Miller
- Neuroimmunology Research Unit and Multiple Sclerosis Center, Lady Davis Carmel Medical Center, Haifa, Israel
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20
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Li Q, Milo R, Panitch H, Bever CT. Effect of propranolol and IFN-beta on the induction of MHC class II expression and cytokine production by IFN-gamma IN THP-1 human monocytic cells. Immunopharmacol Immunotoxicol 1998; 20:39-61. [PMID: 9543699 DOI: 10.3109/08923979809034808] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This study was undertaken to investigate the effects of propranolol, IFN-beta, and the protein kinase modulators on IFN-gamma induction of MHC class II antigen expression and cytokine production in THP-1 human monocytic cells. IFN-gamma induced expression of HLA-DR and DQ molecules and secretion of the monokines IL-1 beta and TNF-alpha in THP-1 cells in a time and dose-dependent manner. The effect of INF-gamma on class II HLA antigens was dose-dependently inhibited by IFN-beta. H-7, phloretin, staurosporine as well as GF 109203X are selective enzyme inhibitors of protein kinase C (PKC), down-regulating IFN-gamma induced MHC class II expression and cytokine production. Stimulators of PKC, like PMA, replaced IFN-gamma in the induction of monokines in THP-1 cells, whereas the addition of HA 1004 or arachidonic acid to the culture had no effect on IFN-gamma mediated changes. Blocking of phospholipase D (PLD)-derived diacylglycerol (DAG) formation by propranolol abrogated IFN-gamma increased HLA class II expression and IL-1 beta secretion, but had little effect on IFN-gamma induced TNF-alpha production. These findings appear to suggest that PLD-derived phosphatidate is not the primary source of DAG production in IFN-gamma-induced TNF-alpha secretion, but may be necessary for IFN-gamma-mediated MHC class II induction and IL-1 beta production in human monocytes, whereas phospholipase A2 may not be required for IFN-gamma activation of PKC in the process.
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Affiliation(s)
- Q Li
- Department of Neurology, Veterans Affairs Medical Center, Baltimore, Maryland 21201, USA
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21
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Wiemann B, Van GY, Danilenko DM, Yan Q, Matheson C, Munyakazi L, Ogenstad S, Starnes CO. Combined treatment of acute EAE in Lewis rats with TNF-binding protein and interleukin-1 receptor antagonist. Exp Neurol 1998; 149:455-63. [PMID: 9500957 DOI: 10.1006/exnr.1997.6723] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Experimental autoimmune encephalomyelitis (EAE) is a term given to describe a collection of animal models representing the human disease multiple sclerosis (MS). Although not fully understood, the involvement of cytokines and the immune system in either EAE or human MS is well established. Past efforts have shown that inhibition of proinflammatory cytokines tumor necrosis factor (TNF-alpha) or interleukin-1 (IL-1) result in amelioration of acute EAE in Lewis rats. The present study examined this model for the effect of concomitant inhibition of both TNF-alpha and IL-1, which resulted in a modest but significant therapeutic effect that was superior to inhibition of either single agent alone with respect to four of the five variables used to follow the progression of disease in this model, i.e., clinical severity, frequency of disease, loss of body weight, and day of onset. These results are in accordance with the idea that combination treatments are likely to prove superior to single agent therapy in the treatment of autoimmune inflammatory disease.
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MESH Headings
- Animals
- Brain/immunology
- Brain/pathology
- Dimerization
- Drug Administration Schedule
- Drug Therapy, Combination
- Encephalomyelitis, Autoimmune, Experimental/pathology
- Encephalomyelitis, Autoimmune, Experimental/physiopathology
- Encephalomyelitis, Autoimmune, Experimental/therapy
- Female
- Humans
- Injections, Intravenous
- Injections, Subcutaneous
- Integrin alpha4beta1
- Integrins/biosynthesis
- Intercellular Adhesion Molecule-1/biosynthesis
- Interleukin 1 Receptor Antagonist Protein
- Interleukin-1/antagonists & inhibitors
- Lymphocyte Function-Associated Antigen-1/biosynthesis
- Polyethylene Glycols
- Rats
- Rats, Inbred Lew
- Receptors, Lymphocyte Homing/biosynthesis
- Receptors, Tumor Necrosis Factor/administration & dosage
- Receptors, Tumor Necrosis Factor/therapeutic use
- Receptors, Very Late Antigen/immunology
- Sialoglycoproteins/administration & dosage
- Sialoglycoproteins/therapeutic use
- Spinal Cord/immunology
- Spinal Cord/pathology
- Tumor Necrosis Factor-alpha/antagonists & inhibitors
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Affiliation(s)
- B Wiemann
- Department of Pharmacology, Amgen, Inc., Thousand Oaks, California 91320-1789, USA
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22
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Li Q, Milo R, Panitch H, Swoveland P, Bever CT. Glatiramer acetate blocks the activation of THP-1 cells by interferon-gamma. Eur J Pharmacol 1998; 342:303-10. [PMID: 9548401 DOI: 10.1016/s0014-2999(97)01509-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Glatiramer acetate (previously known as copolymer 1) is a synthetic copolymer of four amino acids that has been approved for use in the treatment of multiple sclerosis. It has been shown to suppress myelin antigen specific T cell activation by competing with these antigens at the major histocompatibility complex class II binding site and by inducing antigen specific suppressor T cells. In this study we investigated the effects of glatiramer acetate on the human monocytic cell line, THP-1, activated by lipopolysaccharide and interferon-gamma as a model for macrophages. At non-toxic concentrations of glatiramer acetate there were dose dependent reductions in the percentage of cells expressing human leukocyte DR and DQ antigen as well as in mean fluorescence intensity by flow cytometry. Production of tumor necrosis factor-alpha and the lysosomal cysteine proteinase cathepsin B were markedly inhibited, but production of interleukin-1 increased. These results suggest that glatiramer acetate might alter macrophage effector function and suggest that further studies in human monocytes and macrophages are warranted.
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Affiliation(s)
- Q Li
- Department of Neurology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
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23
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Vincent VA, Tilders FJ, Van Dam AM. Production, regulation and role of nitric oxide in glial cells. Mediators Inflamm 1998; 7:239-55. [PMID: 9792334 PMCID: PMC1781853 DOI: 10.1080/09629359890929] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Affiliation(s)
- V A Vincent
- Research Institute Neurosciences Free University, Medical Faculty, Department of Pharmacology, Amsterdam, The Netherlands
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24
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Barkhof F, van Waesberghe JH, Uitdehaag BM, Polman CH. Ibuprofen does not suppress active multiple sclerosis lesions on gadolinium-enhanced MR images. Ann Neurol 1997; 42:982. [PMID: 9403493 DOI: 10.1002/ana.410420622] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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25
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Abstract
The main issues in multiple sclerosis research revolve around four fundamental questions. (1) What initiates the disease-that is, autoimmune T cells, a virus, or a toxin? (2) Is the inflammatory response primary to the development of demyelination, or is it a secondary response to injury? (3) Is the oligodendrocyte, the myelin-producing cell, the primary target? (4) How can myelin repair be promoted? This review focuses on the controversies revolving around these important questions. Although many investigators believe that T-cell receptors on CD4+ cells interact with myelin antigens to initiate an inflammatory cascade that leads to myelin destruction, others maintain that a viral agent may have a direct or indirect role in the pathogenesis of multiple sclerosis. The concept that the immune system contributes to the tissue destruction in multiple sclerosis is generally accepted; however, the debate about cause versus consequence of the pathologic process remains unresolved, as does the identification of the initial event or focus of the damage. Electron microscopic studies have disclosed evidence of remyelination (albeit often incomplete) in lesions of multiple sclerosis. Enhanced understanding of the factors limiting remyelination could help formulate strategies to promote repair. By innovative experimental design and application of available molecular techniques, the answers to these questions may provide insights on how to prevent or treat multiple sclerosis.
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Affiliation(s)
- C F Lucchinetti
- Department of Neurology, Mayo Clinic Rochester, Minnesota 55905, USA
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26
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27
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Clark WM, Lutsep HL. The therapeutic potential of anti-cytokine strategies in central nervous system ischaemia. Expert Opin Investig Drugs 1997; 6:407-15. [PMID: 15989608 DOI: 10.1517/13543784.6.4.407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Central nervous system (CNS) ischaemia is associated with an acute inflammatory response which appears to potentiate CNS injury, especially following reperfusion. This response includes the release of inflammatory mediators, including the cytokines interleukin-1 (IL-1) and TNF-alpha. These trigger the production of additional cytokines, including IL-6, and activate leukocytes which infiltrate the CNS. IL-6 appears to play a central role in modulating this response, exhibiting both pro-inflammatory and anti-inflammatory activities. Preliminary clinical studies suggest that plasma levels of IL-6 are correlated with stroke size and functional recovery. Conversely, brain levels of cytokines have been demonstrated to increase following experimental ischaemia. Although there are at present no clinical ;anti-cytokine' treatment studies, experimental studies modulating cytokines have shown neuroprotection.
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Affiliation(s)
- W M Clark
- Oregon Stroke Center, Department of Neurology, Oregon Health Sciences University, 3181 SW Sam Jackson Park Road, Portland, Oregon 97201, USA
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28
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29
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Rentzos M, Nikolaou C, Rombos A, Voumvourakis K, Segditsa I, Papageorgiou C. Tumour necrosis factor alpha is elevated in serum and cerebrospinal fluid in multiple sclerosis and inflammatory neuropathies. J Neurol 1996; 243:165-70. [PMID: 8750556 DOI: 10.1007/bf02444010] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Tumour necrosis factor alpha (TNFalpha) is a peptide that is derived from T lymphocytes and macrophages and is used as a marker of activated cellular immune responses. TNFalpha was measured in paired sera and cerebrospinal fluid (CSF) from 30 patients with multiple sclerosis (MS) with worsening disability, 54 patients with other neurological diseases, and 20 normal subjects. A sensitive enzyme-linked immunosorbent assay was used to determine the TNFalpha levels. We found significantly elevated serum and CSF levels in 12 (40%) and 6 (20%) MS patients, respectively, compared with healthy controls (P < 0.007 and P < 0.05). Among the 18 patients with neuropathy, we also found high serum and CSF TNFalpha values in 3 (17%) and 5 (28%) patients, respectively (P < 0.04 and P < 0.002). Our study shows that TNFalpha is probably involved in the pathogenetic mechanisms of MS and other inflammatory neurological diseases.
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Affiliation(s)
- M Rentzos
- Department of Neurology, Athens University Medical School, Greece
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30
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Sandberg-Wollheim M, Ciusani E, Salmaggi A, Pociot F. An evaluation of tumor necrosis factor microsatellite alleles in genetic susceptibility to multiple sclerosis. Mult Scler 1995; 1:181-5. [PMID: 9345451 DOI: 10.1177/135245859500100309] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We have analyzed the distribution of tumor necrosis factor (TNF) a and -b microsatellite alleles in HLA-DQ and -DR typed Swedish patients with multiple sclerosis (MS) (n = 122) and ethnically matched control subjects (n = 178). We found significant differences in the frequencies of TNFa and TNFb alleles between patients and controls. TNFaII was significantly associated with MS. This was also the case for the combination of TNFaII with TNFb4. However, TNFaII (alone or in combination with TNFb4) did not show any disease association independent of DQA1*0102/ DQB1*0602/DR2, whereas the previously reported strong association with HLA-DQA1*0102/DQB1*0602/DR2 in Scandinavian populations was confirmed. Therefore the association of TNFaII (and TNFb4) is most likely secondary to the increase of DQA1*0102/DQB1*0602/DR2 in MS patients. The proportion of TNFa6 positive individuals was lower among DR2-negative MS patients than among DR2-negative controls (P = 0.08). Since the presence of the TNFa6 allele correlates with low TNF alpha production in response to lipopolysaccharide, it could be speculated that DR2-negative MS patients have an increased risk of being high TNF alpha producers in response to exogenous stimuli.
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31
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Głabiński A, Mirecka M, Pokoca L. Tumor necrosis factor alpha but not lymphotoxin is overproduced by blood mononuclear cells in multiple sclerosis. Acta Neurol Scand 1995; 91:276-9. [PMID: 7542828 DOI: 10.1111/j.1600-0404.1995.tb07004.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The cytotoxic cytokines tumor necrosis factor alpha (TNF-alpha) and lymphotoxin (LT) possess toxic activity against myelin and/or oligodendrocytes in vitro. Multiple sclerosis (MS) plaques within the central nervous system (CNS) are infiltrated by peripheral blood mononuclear cells (PBMC). In this study the production of TNF-alpha and LT by PBMC in active MS were measured. PBMC were isolated from the blood of MS patients in relapse and also patients with other neurological diseases (OND) and healthy controls (HC). Isolated cells were cultured unstimulated or stimulated with phytohemagglutinin A (PHA), lipopolysaccharide (LPS) and myelin basic protein (MBP)--a hypothetical autoantigen for MS. Cytokine production was assessed using ELISA method. In the MS group, PBMC without stimulation as well as after stimulation with MBP displayed a significantly increased production of TNF-alpha. LT production was similar in MS and control groups. These results suggest that TNF-alpha but not LT is overproduced by PBMC during MS relapse.
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Affiliation(s)
- A Głabiński
- Department of Neurology, Medical University, Lodz, Poland
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32
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Mitrovic B, Ignarro LJ, Vinters HV, Akers MA, Schmid I, Uittenbogaart C, Merrill JE. Nitric oxide induces necrotic but not apoptotic cell death in oligodendrocytes. Neuroscience 1995; 65:531-9. [PMID: 7777166 DOI: 10.1016/0306-4522(94)00491-m] [Citation(s) in RCA: 158] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
We have investigated the mechanism of nitric oxide-induced damage in glial cells. Genomic DNA isolated from astrocytes and microglia, treated for 18 h with varying concentrations of a nitric oxide donor, was analysed by electrophoresis. No DNA damage was evident. Oligodendrocytes, treated with 2 mM nitric oxide for 3-48 h, showed single stranded breaks at 48 h but no laddering of nucleosomic fragments of DNA. When analysed by electron microscopy, ultrastructural changes in oligodendrocytes treated with 1 mM nitric oxide for 24 h showed intact nuclei but alterations in membranes and organelles characteristic of necrosis, including disrupted mitochondria with dissolution of their christae. Astrocytes, a glial cell type that we have previously shown to be much less sensitive to nitric oxide-induced damage, did not show ultrastructural changes. DNA analysis by flow cytometry of glial cells treated with nitric oxide supported the apparent necrotic-type death in oligodendrocytes. Double staining of oligodendrocytes, using Hoechst 33342 and propidium iodide for the simultaneous assessment of both apoptotic and necrotic cells, demonstrated that, while the proportion of dead cells increased with time and increasing concentrations of nitric oxide, the death was due to necrosis and not apoptosis. In this study, we demonstrate that direct exposure to soluble nitric oxide, produced in vitro from a nitric oxide donor chemical, ultimately kills oligodendrocytes by necrosis. Microglia and astrocytes maintain DNA and organelle integrity when exposed to exogenous nitric oxide.
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Affiliation(s)
- B Mitrovic
- Department of Neurology, UCLA School of Medicine 90024, USA
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33
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Clark WM, Lauten JD, Beamer NB, Coull BM. Cytokine and superoxide production in clinical stroke. J Stroke Cerebrovasc Dis 1995; 5:166-71. [DOI: 10.1016/s1052-3057(10)80169-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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34
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Mitrovic B, Ignarro LJ, Montestruque S, Smoll A, Merrill JE. Nitric oxide as a potential pathological mechanism in demyelination: its differential effects on primary glial cells in vitro. Neuroscience 1994; 61:575-85. [PMID: 7969931 DOI: 10.1016/0306-4522(94)90435-9] [Citation(s) in RCA: 202] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Because we believe that macrophage-derived nitric oxide contributes to pathology of demyelinating diseases, we have determined the differential effects of nitric oxide on primary rat glial cells in vitro. Enriched cultures of microglia, astrocytes and oligodendrocytes were treated with S-nitroso,N-acetyl-DL-penicillamine, a nitric oxide-releasing chemical. There was a significantly decreased function of one of the ferrosulfur-containing mitochondrial enzymes after S-nitroso,N-acetyl-DL-penicillamine/nitric oxide treatment in oligodendrocytes and astrocytes compared to microglia, which were much less sensitive to S-nitroso,N-acetyl-DL-penicillamine/nitric oxide at all concentrations. At 0.5 mM S-nitroso,N-acetyl-DL-penicillamine/nitric oxide, astrocytes and oligodendrocytes suffered a 40% loss in succinate dehydrogenase activity, while microglia were unaffected. A control non-ferrosulfur-containing mitochondrial enzyme, isocitrate dehydrogenase, was not affected in any glial cell type. Although the per cent of mitochondrial damage in oligodendrocytes and astrocytes was the same for all concentrations of S-nitroso,N-acetyl-DL-penicillamine/nitric oxide, significant cell death occurred in oligodendrocytes at 1.0 mM; at this concentration there was no significant killing of microglia or astrocytes. Furthermore, at a 0.5 mM concentration of S-nitroso,N-acetyl-DL-penicillamine/nitric oxide, which inhibited mitochondrial respiration but did not kill oligodendrocytes, significant changes in oligodendrocyte morphology (e.g. retraction of processes) occurred. Morphological changes were not seen in microglia and astrocytes at any concentration of S-nitroso,N-acetyl-DL-penicillamine/nitric oxide. In addition, oligodendrocytes were more sensitive to S-nitroso,N-acetyl-DL-penicillamine/nitric oxide-induced single stranded DNA breaks than microglia or astrocytes. The mitochondrial damage was attributable to nitric oxide since N-acetyl-DL-penicillamine had no effect. Oxyhemoglobin, which competitively inhibits toxic effects of nitric oxide, protected these glial cells from mitochondrial damage, single stranded breaks in DNA and cell death in a time- and dose-dependent manner. Once again, oligodendrocytes were less easily rescued from nitric oxide effects by oxyhemoglobin than were astrocytes, suggesting greater vulnerability of the myelin-producing cell to nitric oxide. These findings suggest that there is differential sensitivity of glial cells to nitric oxide. Although oligodendrocytes and astrocytes are equally susceptible to nitric oxide-induced mitochondrial damage, oligodendrocytes are more sensitive to nitric oxide-induced single stranded DNA breaks, morphological changes and cell death. Compared to both oligodendrocytes and astrocytes, microglia, nitric oxide-producing cells, are resistant to nitric oxide-induced damage.
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Affiliation(s)
- B Mitrovic
- Department of Neurology, School of Medicine, University of California at Los Angeles 90024-1769
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35
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Abstract
Although the immunopathology of most autoimmune diseases has been well defined, the mechanisms responsible for the breakdown of self-tolerance and which lead to the development of systemic and organ-specific autoaggression are still unclear. Evidence has accumulated which supports a role for a disregulated production of cytokines by leucocytes and possibly other cells in the pathogenesis of some autoimmune diseases. However, due to the complexity and heterogeneity of cytokine effects in the regulation of the immune response, it is difficult to determine whether abnormalities in the patterns of cytokine production are primary or secondary to the pathological process. Confusion is also caused by the fact that the biological activities of cytokines are multiple and often overlapping, and consequently it is difficult to focus on a unique effect of any one cytokine. Characterization of the potential and actual involvement of cytokines is important not only for a better understanding of the pathogenesis of autoimmune conditions, but particularly because of the implications for the development of immunotherapeutic strategies for the prevention and treatment of the diseases.
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Affiliation(s)
- M G Cavallo
- II Clinica Medica, University of Rome La Sapienza, Rome, Italy
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36
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Feinstein DL, Galea E, Roberts S, Berquist H, Wang H, Reis DJ. Induction of nitric oxide synthase in rat C6 glioma cells. J Neurochem 1994; 62:315-21. [PMID: 7505314 DOI: 10.1046/j.1471-4159.1994.62010315.x] [Citation(s) in RCA: 124] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We have examined the induction of nitric oxide synthase (NOS) activity in the rat astrocyte-derived C6 glioma cell line. In contrast to the previous results with primary astrocyte cultures, incubation of C6 cells with bacterial endotoxin lipopolysaccharide (LPS; 1 microgram/ml for 24 h) did not stimulate NO2 production. However, addition of either tumor necrosis factor-alpha (TNF-alpha) or interferon-gamma (IFN-gamma), cytokines that by themselves had no effect on NOS activity, imparted LPS responsiveness onto these cells in a dose-dependent manner (EC50 values of 39 ng/ml of TNF-alpha and 9.4 U/ml of IFN-gamma), and the effect of TNF-alpha could be further potentiated (twofold) by the presence of interleukin-1 beta. The simultaneous presence of TNF-alpha and IFN-gamma yielded a greater response than either cytokine alone; however, the respective EC50 values were not affected. A cytoplasmic extract from induced C6 cells catalyzed the Ca(2+)-independent conversion of L-arginine to L-citrulline, with an apparent Km of 51.2 microM, and this activity could be blocked by L-arginine analogues in the potency order amino > methyl > nitroarginine. Immunoblot analysis revealed an apparent molecular mass of 125 kDa for the NOS protein induced in C6 cells. These results indicate that the combination of LPS plus cytokines can induce NOS activity in C6 glioma cells with properties similar to those of the enzyme expressed in primary astrocyte cultures.
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Affiliation(s)
- D L Feinstein
- Department of Neurology and Neuroscience, Cornell University Medical College, New York, New York 10021
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37
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Mitrovic B, Martin FC, Charles AC, Ignarro LJ, Anton PA, Shanahan F, Merrill JE. Neurotransmitters and cytokines in CNS pathology. PROGRESS IN BRAIN RESEARCH 1994; 103:319-30. [PMID: 7533912 DOI: 10.1016/s0079-6123(08)61146-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
In summary, we have demonstrated an in vitro model for oligodendrocyte cell death that may be relevant to events in formation of lesions in MS. It involves cell contact to oligodendrocytes with activated, viable microglia (or inflammatory macrophages), surface TNF-alpha, surface adhesion molecules, and production of NO. Precise mechanisms of TNF-alpha and ICAM-1/LFA-1 participation and the nature of the susceptibility of the oligodendrocyte are currently being studied.
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38
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Woodroofe MN, Cuzner ML. Cytokine mRNA expression in inflammatory multiple sclerosis lesions: detection by non-radioactive in situ hybridization. Cytokine 1993; 5:583-8. [PMID: 8186370 DOI: 10.1016/s1043-4666(05)80008-0] [Citation(s) in RCA: 192] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The predominant pathological features in the central nervous system (CNS) in multiple sclerosis (MS) are perivascular inflammation and demyelination. The cells in the inflammatory cuff consist mainly of T lymphocytes and macrophages. Cytokines produced by inflammatory cells within the CNS have the potential to enhance local inflammation and promote phagocytosis of myelin by macrophages, resulting in demyelination. Resident brain cells, microglia and astrocytes, also produce cytokines after stimulation in vitro. We have applied the technique of non-radioactive in situ hybridization to examine which cells in the CNS are producing cytokines in MS. Using digoxigenin-labelled oligonucleotide probes we have detected expression of the cytokines IL-1 alpha, IL-2, IL-4, IL-6, IL-10, IFN-gamma, TGF beta 1 & 2 and TNF-alpha in frozen sections of CNS tissue from MS cases. The intensity and distribution of the staining for mRNA is cytokine specific, IL-6, IFN-gamma and TNF-alpha predominating in the perivascular inflammatory cuffs, the others being more weakly expressed. Expression of all cytokine mRNAs is stronger in perivascular cells rather than in parenchymal cells, suggesting that circulating inflammatory cells which have crossed the blood brain barrier are the major source of cytokines in MS tissue.
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Affiliation(s)
- M N Woodroofe
- Multiple Sclerosis Laboratory, Institute of Neurology, London, UK
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39
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Tsukada N, Miyagi K, Matsuda M, Yanagisawa N. Increased levels of circulating intercellular adhesion molecule-1 in multiple sclerosis and human T-lymphotropic virus type I-associated myelopathy. Ann Neurol 1993; 33:646-9. [PMID: 8098933 DOI: 10.1002/ana.410330614] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We evaluated the presence of soluble intercellular adhesion molecule-1 (sICAM-1) antigen in the sera of patients with multiple sclerosis and human T-lymphotropic virus type I (HTLV-I)-associated myelopathy (HAM) using an enzyme-linked immunosorbent assay. Patients with multiple sclerosis in the active phase had higher sICAM serum levels than did control subjects (p < 0.01). In addition, a significantly increased serum level of sICAM-1 was found in patients with HAM (p < 0.001). Furthermore, we found a positive correlation with HAM sICAM-1 and tumor necrosis factor-alpha levels in the sera of patients with multiple sclerosis in the active phase (r = 0.88, p < 0.01) and in those with HAM (r = 0.86, p < 0.01). These results suggest that serum sICAM-1 may be related to clinical activity in patients with multiple sclerosis and the detection of sICAM-1 could be useful as a marker of inflammatory disease.
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Affiliation(s)
- N Tsukada
- Department of Neurology, Shinshu University, School of Medicine, Matsumoto, Japan
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40
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Abstract
The Guillain-Barré syndrome (GBS) and multiple sclerosis (MS) are thought to result from aberrant immune responses to myelin antigens. Recent evidence to implicate the cytokine tumor necrosis factor-alpha (TNF-alpha) and the intercellular adhesion molecule-1 (ICAM-1) in the pathogenesis of these disorders is reviewed. In GBS, elevated serum concentrations of TNF-alpha are detectable in 20 to 50% of patients. TNF-alpha released from autoreactive T cells, macrophages, or microglia may contribute to inflammatory demyelinative processes by upregulating the expression of recognition molecules on antigen-presenting cells; by cytotoxic damage to endothelium; by stimulating the secretion of inflammatory mediators; by directly injuring the myelin sheath; or by interfering with impulse propagation. Its pathogenic potential in GBS is underscored by findings in experimental autoimmune neuritis. Soluble ICAM-1, originating from T cells, macrophages, endothelium, or glial cells, circulates at increased concentrations in serum and cerebrospinal fluid of patients with active MS. ICAM-1 may be crucially involved in the migration of autoreactive T lymphocytes from blood to brain. Whether ICAM-1 can serve as a marker of acute inflammatory events in MS associated with clinical relapses warrants further investigation. TNF-alpha and ICAM-1 could be targets for antigen nonspecific treatment approaches to the inflammatory demyelinating diseases GBS and MS.
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Affiliation(s)
- H P Hartung
- Clinical Research Group for Multiple Sclerosis, Julius-Maximilians-Universität Würzburg, Germany
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41
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Imamura K, Suzumura A, Hayashi F, Marunouchi T. Cytokine production by peripheral blood monocytes/macrophages in multiple sclerosis patients. Acta Neurol Scand 1993; 87:281-5. [PMID: 8503256 DOI: 10.1111/j.1600-0404.1993.tb05508.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
To determine the function of monocytes/macrophages in the acute phase of multiple sclerosis (MS), we investigated the production of tumor necrosis factor alpha (TNF alpha), interleukin-1 alpha (IL-1 alpha), IL-1 beta and IL-6 by peripheral blood monocytes/macrophages (PBM) in patients with MS, other autoimmune neurological disease (OAND), other neurological disease (OND) and normal controls was assessed using enzyme-linked immunosorbent assay (ELISA). When stimulated with lipopolysaccharide or phorbol ester, PBM obtained during acute phase of MS relapse patients produced significantly higher amounts of all these cytokines than did PBM from patients with chronic stable MS or OAND or OND or from normal controls. The results suggest a possible role of activated monocytes/macrophages in the acute exacerbation of MS.
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Affiliation(s)
- K Imamura
- Department of Neurology, Hekinan Municipal Hospital, Aichi, Japan
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42
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Lane TE, Wu-Hsieh BA, Howard DH. Gamma interferon cooperates with lipopolysaccharide to activate mouse splenic macrophages to an antihistoplasma state. Infect Immun 1993; 61:1468-73. [PMID: 8454351 PMCID: PMC281387 DOI: 10.1128/iai.61.4.1468-1473.1993] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Inhibition of the intracellular growth of Histoplasma capsulatum by murine resident red pulp splenic macrophages was examined. Splenic macrophages, unlike resident peritoneal macrophages, required a prolonged preincubation (18 h) with recombinant murine gamma interferon (rMuIFN-gamma) for activation. To be fully activated, the splenic macrophages required incubation with rMuIFN-gamma in combination with 0.1 microgram of lipopolysaccharide (LPS) per ml. Splenic macrophages stimulated with rMuIFN-gamma, LPS, or rMuIFN-gamma and LPS produced tumor necrosis factor alpha (TNF-alpha), but recombinant murine TNF-alpha (rMuTNF-alpha) did not activate macrophages when used alone or as a second signal with rMuIFN-gamma. Anti-TNF-alpha antibody did not block IFN-gamma-LPS activation of splenic macrophages to any significant extent. One hundred micromolar ferrous sulfate antagonized IFN-gamma-LPS activation of splenic macrophages, indicating that iron was involved in the fungistatic activity of cytokine-stimulated phagocytes. Our results indicate that (i) splenic macrophages differ significantly from peritoneal macrophages in their requirements for activation and (ii) the mechanism by which splenic macrophages exert their antifungal effects involves iron.
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Affiliation(s)
- T E Lane
- Department of Microbiology and Immunology, University of California, Los Angeles School of Medicine 90024
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43
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Louis JC, Magal E, Takayama S, Varon S. CNTF protection of oligodendrocytes against natural and tumor necrosis factor-induced death. Science 1993; 259:689-92. [PMID: 8430320 DOI: 10.1126/science.8430320] [Citation(s) in RCA: 406] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A proportion of developing oligodendrocytes undergo natural cell death by apoptosis, and mature oligodendrocytes die, either by apoptosis or necrosis, in response to injurious signals such as cytotoxic cytokines and complement. Ciliary neurotrophic factor (CNTF), a trophic factor found in astrocytes in the central nervous system (CNS), promoted the survival and maturation of cultured oligodendrocytes. This trophic factor also protected oligodendrocytes from death induced by tumor necrosis factors (apoptosis) but not against complement (necrosis). These results suggest that CNTF functions in the survival of oligodendrocytes during development and may lead to therapeutic approaches for degenerative diseases of the CNS that involve oligodendrocyte destruction.
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Affiliation(s)
- J C Louis
- Department of Biology, University of California, San Diego, La Jolla 92093
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44
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Merrill JE, Martínez-Maza O. Cytokines in AIDS-Associated Nervous and Immune System Dysfunction. METHODS IN NEUROSCIENCES 1993. [DOI: 10.1016/s1043-9471(13)70019-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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45
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Voskuhl RR, Martin R, Bergman C, Dalal M, Ruddle NH, McFarland HF. T helper 1 (Th1) functional phenotype of human myelin basic protein-specific T lymphocytes. Autoimmunity 1993; 15:137-43. [PMID: 7692995 DOI: 10.3109/08916939309043888] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Multiple sclerosis (MS) is widely accepted as an autoimmune disease with myelin basic protein (MBP) a candidate autoantigen. In the current report, human T cell lines specific for an immunodominant region of MBP were shown to have a functional phenotype similar to T helper 1 (Th1) inflammatory cells of the mouse on the basis of their antigen-specific cytotoxic activity and production of interferon-gamma and lymphotoxin/tumor necrosis factor-alpha, but not interleukin-4. In experimental allergic encephalomyelitis (EAE), a proposed animal model for MS, MBP-specific T cell lines which mediate disease are of the Th1 subtype. Thus, MBP-specific T cells in humans exist which are phenotypically similar to MBP-specific encephalitogenic T cells in murine EAE.
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Affiliation(s)
- R R Voskuhl
- Neuroimmunology Branch, National Institutes of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, MD 20892
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46
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Neu I, Mallinger J, Wildfeuer A, Mehlber L. Leukotrienes in the cerebrospinal fluid of multiple sclerosis patients. Acta Neurol Scand 1992; 86:586-7. [PMID: 1336293 DOI: 10.1111/j.1600-0404.1992.tb05491.x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The concentration of the leukotrienes B4 (LTB4) and C4 (LTC4) was measured in the cerebrospinal fluid (CSF) of 38 multiple sclerosis (MS) patients and 51 with other neurological diseases. The LTB4 and LTC4 levels were significantly elevated in MS compared with the controls. The findings suggest that lipoxygenase products might play a pathogenetic role in the early, encephalitogenic phase of MS. The administration of lipoxygenase inhibitors or leukotriene antagonists might well open new perspectives for the treatment of MS.
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Affiliation(s)
- I Neu
- Sindelfingen Municipal Hospital, Germany
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47
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Affiliation(s)
- J Brynskov
- Dept. of Medical Gastroenterology C, Herlev Hospital, University of Copenhagen, Denmark
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48
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Hartung HP, Jung S, Stoll G, Zielasek J, Schmidt B, Archelos JJ, Toyka KV. Inflammatory mediators in demyelinating disorders of the CNS and PNS. J Neuroimmunol 1992; 40:197-210. [PMID: 1331168 DOI: 10.1016/0165-5728(92)90134-7] [Citation(s) in RCA: 175] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Work in both experimental models and human disorders of the central and peripheral nervous system has delineated multiple effector mechanisms that operate to produce inflammatory demyelination. The role of various soluble inflammatory mediators generated and released by both blood-borne and resident cells in this process will be reviewed. Cytokines such as interleukin (IL)-1, interferon (IFN)-gamma, and tumor necrosis factor (TNF)-alpha are pivotal in orchestrating immune and inflammatory cell-cell interactions and represent potentially noxious molecules to the myelin sheath, Schwann cells, and/or oligodendrocytes. Arachidonic acid metabolites, synthesized by and liberated from astrocytes, microglial cells and macrophages, are intimately involved in the inflammatory process by enhancing vascular permeability, providing chemotactic signals and modulating inflammatory cell activities. Reactive oxygen species can damage myelin by lipid peroxidation and may be cytotoxic to myelin-producing cells. They are released from macrophages and microglial cells in response to inflammatory cytokines. Activation of complement yields a number of inflammatory mediators and results in the assembly of the membrane attack complex that inserts into the myelin sheath-creating pores. Activated complement may contribute both to functional disturbance of neural impulse propagation, and to full-blown demyelination. Proteases, abundantly present at inflammatory foci, can degrade myelin. Vasoactive amines may play an important role in breaching of the blood-brain/blood-nerve barrier. The importance of nitric oxide metabolites in inflammatory demyelination merits investigation. A better understanding of the multiple effector mechanisms operating in inflammatory demyelination may help to devise more efficacious antigen non-specific therapy.
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Affiliation(s)
- H P Hartung
- Department of Neurology, Julius-Maximilians-Universität, Würzburg, Germany
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49
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Zoukos Y, Leonard JP, Thomaides T, Thompson AJ, Cuzner ML. beta-Adrenergic receptor density and function of peripheral blood mononuclear cells are increased in multiple sclerosis: a regulatory role for cortisol and interleukin-1. Ann Neurol 1992; 31:657-62. [PMID: 1325138 DOI: 10.1002/ana.410310614] [Citation(s) in RCA: 57] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
An increased density of beta-adrenergic receptors was demonstrated on peripheral blood mononuclear cells (PBMCs) from patients with progressive or relapsing-remitting multiple sclerosis (MS). The same observation was made in patients with chronic active rheumatoid arthritis, but not in those with myasthenia gravis. The affinity of the receptors was within the normal range in all tested groups of patients and there was a positive correlation between density and function as determined by intracellular cyclic AMP production after stimulation with isoproterenol. A putative link between inflammatory process and the functional upregulation of beta-adrenergic receptors on PBMCs was tested by in vitro studies with the soluble mediators interleukin-1 and hydrocortisone. A functional upregulation of beta-adrenergic receptors was observed when PBMCs from normal control subjects were cultured in the presence of either mediator, whereas the already upregulated receptor density on PBMCs from patients with MS remained unchanged. Whether this represents a recovery mechanism to inflammation in MS or a blunting of homeostatic immunoregulatory mechanisms requires further investigation.
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MESH Headings
- Adult
- Aged
- Arthritis, Rheumatoid/blood
- Arthritis, Rheumatoid/immunology
- Arthritis, Rheumatoid/physiopathology
- Autoimmune Diseases/blood
- Autoimmune Diseases/immunology
- Autoimmune Diseases/physiopathology
- Cells, Cultured
- Cyclic AMP/biosynthesis
- Epinephrine/blood
- Humans
- Hydrocortisone/blood
- Hydrocortisone/pharmacology
- Hydrocortisone/physiology
- Interleukin-1/pharmacology
- Isoproterenol/pharmacology
- Leukocytes, Mononuclear/chemistry
- Leukocytes, Mononuclear/drug effects
- Leukocytes, Mononuclear/immunology
- Middle Aged
- Multiple Sclerosis/blood
- Multiple Sclerosis/immunology
- Multiple Sclerosis/physiopathology
- Myasthenia Gravis/blood
- Myasthenia Gravis/immunology
- Myasthenia Gravis/physiopathology
- Norepinephrine/blood
- Receptors, Adrenergic, beta/analysis
- Receptors, Adrenergic, beta/drug effects
- Up-Regulation/drug effects
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Affiliation(s)
- Y Zoukos
- Multiple Sclerosis Society Laboratory, Institute of Neurology, London, United Kingdom
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50
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Selmaj KW. The role of cytokines in inflammatory conditions of the central nervous system. ACTA ACUST UNITED AC 1992. [DOI: 10.1016/1044-5765(92)90005-m] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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