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Oxidative stress in multiple sclerosis

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https://www.readbyqxmd.com/read/28086920/absence-of-system-xc-on-immune-cells-invading-the-central-nervous-system-alleviates-experimental-autoimmune-encephalitis
#1
Ellen Merckx, Giulia Albertini, Magdalena Paterka, Cathy Jensen, Philipp Albrecht, Michael Dietrich, Joeri Van Liefferinge, Eduard Bentea, Lise Verbruggen, Thomas Demuyser, Lauren Deneyer, Jan Lewerenz, Geert van Loo, Jacques De Keyser, Hideyo Sato, Pamela Maher, Axel Methner, Ann Massie
BACKGROUND: Multiple sclerosis (MS) is an autoimmune demyelinating disease that affects the central nervous system (CNS), leading to neurodegeneration and chronic disability. Accumulating evidence points to a key role for neuroinflammation, oxidative stress, and excitotoxicity in this degenerative process. System xc(-) or the cystine/glutamate antiporter could tie these pathological mechanisms together: its activity is enhanced by reactive oxygen species and inflammatory stimuli, and its enhancement might lead to the release of toxic amounts of glutamate, thereby triggering excitotoxicity and neurodegeneration...
January 13, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28049398/infectious-agents-and-neurodegenerative-diseases-exploring-the-links
#2
Mohammad Zubair Alam, Qamre Alam, Mohammad Amjad Kamal, Asif Ahmad Jiman-Fatani, Esam I Azhar, Mohammad Azhar Khan, Absarul Haque
Recent studies have shown that bacterial and viral infections are risk factors for various neurodegenerative diseases such as Amyotrophic lateral sclerosis (ALS), Multiple Sclerosis (MS), Alzheimer's disease (AD), and Lyme disease (LD). However, it is still controversial how the infections play a role in neurological diseases progression. Infections in central nervous system may lead multiple damages in infected and neighboring cells. The infection leads to the activation of inflammatory processes and host immune responses, which acts as defense mechanism and also causes damage to the host neuronal functions and viability...
January 3, 2017: Current Topics in Medicinal Chemistry
https://www.readbyqxmd.com/read/28042737/thyroid-hormone-level-is-associated-with-the-frequency-and-severity-of-guillain-barr%C3%A3-syndrome
#3
Yuanyuan Huang, Zhaojian Ying, Zhibo Chen, Weiwei Xiang, Zhongqian Su, Weiwei Quan, Yiyun Weng, Xu Zhang
OBJECTIVE: Guillain-Barré syndrome (GBS) is a neurodegenerative and inflammatory demyelination disorder, and oxidative stress is concerned with the pathogenesis of the disease. Also we found that thyroid hormone level is correlated to the oxidative and antioxidant status in previous studies. Our study was aimed to find the possible relationship between the frequency and severity of GBS and thyroid hormone levels. MATERIALS AND METHODS: We measured serum levels of thyroid stimulating hormone (TSH), free thyroxine (FT4) and free triiodothyronine (FT3) in 238 individuals, including 90 GBS, 44 multiple sclerosis (MS) and 104 healthy controls...
January 2, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28011382/multiple-sclerosis-therapeutic-applications-of-advancing-drug-delivery-systems
#4
REVIEW
Sanam Dolati, Zohreh Babaloo, Farhad Jadidi-Niaragh, Hormoz Ayromlou, Sanam Sadreddini, Mehdi Yousefi
Multiple sclerosis (MS) is an inflammatory autoimmune disease of the central nervous system, which is accompanying with demyelination, neurodegeneration and sensibility to oxidative stress. In MS, auto-reactive lymphocytes cross the blood-brain barrier (BBB) and reside in the perivenous demyelinating lesions which create various distinct inflammatory demyelinated plaques situated predominantly in the white matter. The current MS-related therapeutic approaches can be classified into disease-modifying therapies (DMTs) and symptomatic therapy...
December 20, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27993870/possible-implication-of-gstp1-and-nqo1-polymorphisms-on-natalizumab-response-in-multiple-sclerosis
#5
Athanasia Alexoudi, Sophia Zachaki, Chrysa Stavropoulou, Stavroula Gavrili, Chara Spiliopoulou, Stavroula Papadodima, Clementine E Karageorgiou, Constantina Sambani
Oxidative stress plays a pivotal role in the pathogenesis of multiple sclerosis (MS). Inactivating polymorphism of genes encoding detoxification enzymes, such as NQO1 and GSTP1 could influence susceptibility to MS. The monoclonal antibody natalizumab is an effective treatment in MS. Natalizumab's efficacy in MS patients with regard to NQO1 and GSTP1 genetic polymorphisms is investigated. 130 patients with definite MS according to the Mc Donald's criteria treated monthly with natalizumab were included in the study...
December 2016: Annals of Clinical and Laboratory Science
https://www.readbyqxmd.com/read/27965646/synthesis-of-sphingolipids-impacts-survival-of-porphyromonas-gingivalis-and-the-presentation-of-surface-polysaccharides
#6
Zachary D Moye, Kornelija Valiuskyte, Floyd E Dewhirst, Frank C Nichols, Mary E Davey
Bacteria alter the biophysical properties of their membrane lipids in response to environmental cues, such as shifts in pH or temperature. In essence, lipid composition determines membrane structure, which in turn influences many basic functions, such as transport, secretion, and signaling. Like other members of the phylum Bacteroidetes, the oral anaerobe Porphyromonas gingivalis possesses the ability to synthesize a variety of novel membrane lipids, including species of dihydroceramides that are distinct, yet similar in structure to sphingolipids produced by the human host...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27917122/glucagon-like-peptide-1-analog-liraglutide-delays-onset-of-experimental-autoimmune-encephalitis-in-lewis-rats
#7
Brian DellaValle, Gitte S Brix, Birgitte Brock, Michael Gejl, Anne M Landau, Arne Møller, Jørgen Rungby, Agnete Larsen
Introduction: Recent findings indicate that metabolic disturbances are involved in multiple sclerosis (MS) pathology and influence the susceptibility to treatment, directing attention toward anti-diabetic drugs such as metformin and pioglitazone. Liraglutide, a drug of the glucagon-like peptide-1 (GLP-1) family, is also anti-diabetic and weight-reducing and is, moreover, directly neuroprotective and anti-inflammatory in a broad spectrum of experimental models of brain disease. In this study we investigate the potential for this FDA-approved drug, liraglutide, as a treatment for MS by utilizing the experimental model, experimental autoimmune encephalitis (EAE)...
2016: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/27904492/hydroxycitric-acid-ameliorates-inflammation-and-oxidative-stress-in-mouse-models-of-multiple-sclerosis
#8
Mahdi Goudarzvand, Sanaz Afraei, Somaye Yaslianifard, Saleh Ghiasy, Ghazal Sadri, Mustafa Kalvandi, Tina Alinia, Ali Mohebbi, Reza Yazdani, Shahin Khadem Azarian, Abbas Mirshafiey, Gholamreza Azizi
Hydroxycitric acid (HCA) is derived primarily from the Garcinia plant and is widely used for its anti-inflammatory effects. Multiple sclerosis can cause an inflammatory demyelination and axonal damage. In this study, to validate the hypothesis that HCA exhibits therapeutic effects on multiple sclerosis, we established female C57BL/6 mouse models of multiple sclerosis, i.e., experimental autoimmune encephalomyelitis, using Complete Freund's Adjuvant (CFA) emulsion containing myelin oligodendrocyte glycoprotein (35-55)...
October 2016: Neural Regeneration Research
https://www.readbyqxmd.com/read/27872279/role-of-the-receptor-mas-in-macrophage-mediated-inflammation-in-vivo
#9
Anna Hammer, Guang Yang, Juliane Friedrich, Agnes Kovacs, De-Hyung Lee, Katharina Grave, Stefanie Jörg, Natalia Alenina, Janina Grosch, Jürgen Winkler, Ralf Gold, Michael Bader, Arndt Manzel, Lars C Rump, Dominik N Müller, Ralf A Linker, Johannes Stegbauer
Recently, an alternative renin-angiotensin system pathway has been described, which involves binding of angiotensin-(1-7) to its receptor Mas. The Mas axis may counterbalance angiotensin-II-mediated proinflammatory effects, likely by affecting macrophage function. Here we investigate the role of Mas in murine models of autoimmune neuroinflammation and atherosclerosis, which both involve macrophage-driven pathomechanisms. Mas signaling affected macrophage polarization, migration, and macrophage-mediated T-cell activation...
December 6, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27829982/new-insights-into-the-role-of-oxidative-stress-mechanisms-in-the-pathophysiology-and-treatment-of-multiple-sclerosis
#10
REVIEW
Bożena Adamczyk, Monika Adamczyk-Sowa
Multiple sclerosis (MS) is a multifactorial disease of the central nervous system (CNS) characterized by an inflammatory process and demyelination. The etiology of the disease is still not fully understood. Therefore, finding new etiological factors is of such crucial importance. It is suspected that the development of MS may be affected by oxidative stress (OS). In the acute phase OS initiates inflammatory processes and in the chronic phase it sustains neurodegeneration. Redox processes in MS are associated with mitochondrial dysfunction, dysregulation of axonal bioenergetics, iron accumulation in the brain, impaired oxidant/antioxidant balance, and OS memory...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27812760/sex-difference-in-oxidative-stress-parameters-in-spinal-cord-of-rats-with-experimental-autoimmune-encephalomyelitis-relation-to-neurological-deficit
#11
Mirjana Dimitrijević, Jelena Kotur-Stevuljević, Zorica Stojić-Vukanić, Ivana Vujnović, Ivan Pilipović, Mirjana Nacka-Aleksić, Gordana Leposavić
The study examined (a) whether there is sex difference in spinal cord and plasma oxidative stress profiles in Dark Agouti rats immunised for experimental autoimmune encephalomyelitis (EAE), the principal experimental model of multiple sclerosis, and (b) whether there is correlation between the oxidative stress in spinal cord and neurological deficit. Regardless of rat sex, with the disease development xanthine oxidase (XO) activity and inducible nitric oxide synthase (iNOS) mRNA expression increased in spinal cord, whereas glutathione levels decreased...
November 3, 2016: Neurochemical Research
https://www.readbyqxmd.com/read/27809706/oxidative-stress-and-mitochondrial-dysfunction-linked-neurodegenerative-disorders
#12
Md Torequl Islam
Reactive species play an important role in physiological functions. Overproduction of reactive species, notably reactive oxygen (ROS) and nitrogen (RNS) species along with the failure of balance by the body's antioxidant enzyme systems results in destruction of cellular structures, lipids, proteins, and genetic materials such as DNA and RNA. Moreover, the effects of reactive species on mitochondria and their metabolic processes eventually cause a rise in ROS/RNS levels, leading to oxidation of mitochondrial proteins, lipids, and DNA...
January 2017: Neurological Research
https://www.readbyqxmd.com/read/27804858/heat-shock-proteins-old-and-novel-roles-in-neurodegenerative-diseases-in-the-central-nervous-system
#13
Sandra Amor, Marianna Bugiani, Johannes M van Noort
Heat shock proteins (HSPs) are families of molecular chaperones that play important homeostatic functions in the central nervous system (CNS) by preventing protein misfolding, promoting degradation of improperly folded proteins, and protecting against apoptosis and inflammatory damage especially during hyperthermia, hypoxia, or oxidative stress. Under stress conditions, HSPs are upregulated to protect cells from damage that accumulates during ageing as well as pathological conditions. An important, yet frequently overlooked function of some HSPs is their ability to function as extracellular messengers (also termed chaperokines) that modulate immune responses within the CNS...
October 31, 2016: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/27785417/metabolic-response-to-glatiramer-acetate-therapy-in-multiple-sclerosis-patients
#14
Lidia De Riccardis, Alessandra Ferramosca, Antonio Danieli, Giorgio Trianni, Vincenzo Zara, Francesca De Robertis, Michele Maffia
Glatiramer acetate (GA; Copaxone) is a random copolymer of glutamic acid, lysine, alanine, and tyrosine used for the treatment of patients with multiple sclerosis (MS). Its mechanism of action has not been already fully elucidated, but it seems that GA has an immune-modulatory effect and neuro-protective properties. Lymphocyte mitochondrial dysfunction underlines the onset of several autoimmune disorders. In MS first diagnosis patients, CD4(+), the main T cell subset involved in the pathogenesis of MS, undergo a metabolic reprogramming that consist in the up-regulation of glycolysis and in the down-regulation of oxidative phosphorylation...
December 2016: BBA Clinical
https://www.readbyqxmd.com/read/27733178/fumarate-modulates-the-immune-inflammatory-response-and-rescues-nerve-cells-and-neurological-function-after-stroke-in-rats
#15
Ruihe Lin, Jingli Cai, Eric W Kostuk, Robert Rosenwasser, Lorraine Iacovitti
BACKGROUND: Dimethyl fumarate (DMF), working via its metabolite monomethylfumarate (MMF), acts as a potent antioxidant and immunomodulator in animal models of neurologic disease and in patients with multiple sclerosis. These properties and their translational potential led us to investigate whether DMF/MMF could also protect at-risk and/or dying neurons in models of ischemic stroke in vitro and in vivo. Although the antioxidant effects have been partially addressed, the benefits of DMF immunomodulation after ischemic stroke still need to be explored...
October 13, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27725581/recent-advances-in-elucidating-keap1-nrf2-functions-in-hematopoietic-immune-cells-and-leukemic-cells
#16
Shohei Murakami, Hozumi Motohashi
The KEAP1-NRF2 system is an inducible molecular mechanism enhancing transcriptions of several cytoprotective genes in response to xenobiotics and oxidative stress. Recently, the KEAP1-NRF2 system has been suggested to directly regulate a portion of the genes related to cell proliferation and differentiation. In hematopoietic cells, NRF2 activation plays a role in maintenance and cell fate determination of hematopoietic stem cells, as well as in maturation processes and homeostasis of megakaryocytes and erythrocytes...
2016: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/27725112/gene-expression-profiling-of-the-astrocyte-transcriptome-in-multiple-sclerosis-normal-appearing-white-matter-reveals-a-neuroprotective-role
#17
Rachel Waller, M Nicola Woodroofe, Stephen B Wharton, Paul G Ince, Simona Francese, Paul R Heath, Alex Cudzich-Madry, Ruth H Thomas, Natalie Rounding, Basil Sharrack, Julie E Simpson
Multiple sclerosis (MS) is a chronic, inflammatory, demyelinating disease of the central nervous system (CNS). White matter lesions in MS are surrounded by areas of non-demyelinated normal appearing white matter (NAWM) with complex pathology, including blood brain barrier dysfunction, axonal damage and glial activation. Astrocytes, the most abundant cell type within the CNS, may respond and/or contribute to lesion pathogenesis. We aimed to characterise the transcriptomic profile of astrocytes in NAWM to determine whether specific glial changes exist in the NAWM which contribute to lesion development or prevent disease progression...
October 15, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/27718209/lipopolysaccharide-binding-protein-and-oxidative-stress-in-a-multiple-sclerosis-model
#18
Begoña M Escribano, Francisco J Medina-Fernández, Macarena Aguilar-Luque, Eduardo Agüera, Montserrat Feijoo, Fe I Garcia-Maceira, Rafael Lillo, Patricia Vieyra-Reyes, Ana I Giraldo, Evelio Luque, René Drucker-Colín, Isaac Túnez
Recent findings in experimental autoimmune encephalomyelitis (EAE) suggest that altering certain bacterial populations present in the gut may lead to a proinflammatory condition, that could result in the development of multiple sclerosis (MS). Also, Reactive Oxygen Species seem to be involved in the course of MS. In this study, it has been aimed to relate all these variables starting from an analysis of the lipopolysaccharide (LPS) and LPS-binding protein (LBP) with the determination of parameters related to oxidative stress in the blood, brain and spinal cord...
October 7, 2016: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/27683897/age-related-changes-in-axonal-and-mitochondrial-ultrastructure-and-function-in-white-matter
#19
Katharine E Stahon, Chinthasagar Bastian, Shelby Griffith, Grahame J Kidd, Sylvain Brunet, Selva Baltan
UNLABELLED: The impact of aging on CNS white matter (WM) is of general interest because the global effects of aging on myelinated nerve fibers are more complex and profound than those in cortical gray matter. It is important to distinguish between axonal changes created by normal aging and those caused by neurodegenerative diseases, including multiple sclerosis, stroke, glaucoma, Alzheimer's disease, and traumatic brain injury. Using three-dimensional electron microscopy, we show that in mouse optic nerve, which is a pure and fully myelinated WM tract, aging axons are larger, have thicker myelin, and are characterized by longer and thicker mitochondria, which are associated with altered levels of mitochondrial shaping proteins...
September 28, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27669638/clinical-and-metabolic-response-to-probiotic-supplementation-in%C3%A2-patients-with-multiple-sclerosis-a-randomized-double-blind-placebo-controlled-trial
#20
Ebrahim Kouchaki, Omid Reza Tamtaji, Mahmoud Salami, Fereshteh Bahmani, Reza Daneshvar Kakhaki, Elmira Akbari, Maryam Tajabadi-Ebrahimi, Parvaneh Jafari, Zatollah Asemi
BACKGROUND & AIMS: This trial was performed to evaluate the effects of probiotic intake on disability, mental health and metabolic condition in subjects with multiple sclerosis (MS). METHODS: This randomized double-blind placebo-controlled clinical trial was conducted among 60 MS patients. Participants were randomly allocated into two groups to receive either a probiotic capsule (n = 30) or placebo containing starch (n = 30) for 12 weeks. Expanded disability status scale (EDSS) scoring and parameters of mental health were recorded at the baseline and 12 weeks after the intervention...
September 16, 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
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