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https://www.readbyqxmd.com/read/28927011/assessing-autophagy-in-sciatic-nerves-of-a-rat-model-that-develops-inflammatory-autoimmune-peripheral-neuropathies
#1
REVIEW
Susana Brun, Nicolas Schall, Hélène Jeltsch-David, Jérôme de Sèze, Sylviane Muller
The rat sciatic nerve has attracted widespread attention as an excellent model system for studying autophagy alterations in peripheral neuropathies. In our laboratory, we have developed an original rat model, which we used currently in routine novel drug screening and to evaluate treatment strategies for chronic inflammatory demyelinating polyneuropathy (CIDP) and other closely related diseases. Lewis rats injected with the S-palmitoylated P0(180-199) peptide develop a chronic, sometimes relapsing-remitting type of disease...
September 18, 2017: Cells
https://www.readbyqxmd.com/read/28926781/a-leukomyeloencephalopathy-of-unknown-origin-in-an-azawakh-dog
#2
Maria Teresa Mandara, Alice Reginato, Federica Balducci, Marco Bernardini
A diffuse bilaterally symmetrical leukomyeloencephalopathy was observed in a 6-year-old male Azawakh dog showing a slowly progressive ataxia of six months duration associated with sensory disorders. Severe bilaterally symmetrical demyelination and vacuolisation were confined to the dorsal columns along the entire spinal cord with a minor axonal degeneration. The main changes of myelin sheaths consisted in splitting and intramyelin vacuolization. Naked axons were scattered in a network of astrocytic processes and collagen fibres...
September 5, 2017: Research in Veterinary Science
https://www.readbyqxmd.com/read/28926646/vascular-hypoperfusion-in-acute-optic-neuritis-is-a-potentially-new-neurovascular-model-for-demyelinating-diseases
#3
Ta-Ching Chen, Chao-Yuan Yeh, Chao-Wen Lin, Chung-May Yang, Chang-Hao Yang, I-Hung Lin, Pao-Yang Chen, Jung-Yu Cheng, Fung-Rong Hu
PURPOSE: Optic neuritis is highly correlated with multiple sclerosis and is a major cause of acute visual loss and long-term neuronal degeneration. Primary cerebral hypoperfusion has been reported in brain demyelinating diseases. This study investigated whether peripapillary perfusion is changed in patients with acute optic neuritis (AON). METHODS: This three-year cohort study was conducted from September 1 2012, to August 31, 2015. Two hundred and forty-one patients with non-glaucomatous acute optic neuropathy were screened, and 42 non-highly myopic patients who had suffered their first episode of unilaterally idiopathic AON were studied...
2017: PloS One
https://www.readbyqxmd.com/read/28926419/peduncular-hallucinosis-and-autonomic-dysfunction-in-anti-aquaporin-4-antibody-syndrome
#4
Renee Berry, Peter K Panegyres
Neuromyelitis optica is a rare, severe inflammatory demyelinating disease of the central nervous system, previously described as affecting only the optic nerve and spinal cord. Since the discovery of a highly specific autoantibody, anti-aquaporin-4, lesions are now recognized outside these regions. We report a man with severe, debilitating symptoms resulting from a symptomatic lesion within the diencephalon, manifesting with abnormal circadian rhythms, autonomic dysfunction, behavioral disturbance, and complex visual hallucinations...
September 2017: Cognitive and Behavioral Neurology: Official Journal of the Society for Behavioral and Cognitive Neurology
https://www.readbyqxmd.com/read/28926131/region-specific-impairment-of-the-cervical-spinal-cord-sc-in-amyotrophic-lateral-sclerosis-a-preliminary-study-using-sc-templates-and-quantitative-mri-diffusion-tensor-imaging-inhomogeneous-magnetization-transfer
#5
Henitsoa Rasoanandrianina, Aude-Marie Grapperon, Manuel Taso, Olivier M Girard, Guillaume Duhamel, Maxime Guye, Jean-Philippe Ranjeva, Shahram Attarian, Annie Verschueren, Virginie Callot
In this preliminary study, our objective was to investigate the potential of high-resolution anatomical imaging, diffusion tensor imaging (DTI) and conventional/inhomogeneous magnetization transfer imaging [magnetization transfer (MT)/inhomogeneous magnetization transfer (ihMT)] at 3 T, analyzed with template-extracted regions of interest, to measure the atrophy and structural changes of white (WM) and gray (GM) matter spinal cord (SC) occurring in patients with amyotrophic lateral sclerosis (ALS). Ten patients with ALS and 20 age-matched healthy controls were recruited...
September 19, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/28925069/myelin-plasticity-neural-activity-and-traumatic-neural-injury
#6
REVIEW
Bethany R Kondiles, Philip J Horner
The possibility that adult organisms exhibit myelin plasticity has recently become a topic of great interest. Many researchers are exploring the role of myelin growth and adaptation in daily functions such as memory and motor learning. Here we consider evidence for three different potential categories of myelin plasticity: the myelination of previously bare axons, remodeling of existing sheaths, and the removal of a sheath with replacement by a new internode. We also review evidence that points to the importance of neural activity as a mechanism by which oligodendrocyte precursor cells (OPCs) are cued to differentiate into myelinating oligodendrocytes, which may potentially be an important component of myelin plasticity...
September 19, 2017: Developmental Neurobiology
https://www.readbyqxmd.com/read/28925029/loss-of-gas6-and-axl-signaling-results-in-extensive-axonal-damage-motor-deficits-prolonged-neuroinflammation-and-less-remyelination-following-cuprizone-exposure
#7
Alex K Ray, Juwen C DuBois, Ross C Gruber, Hillary M Guzik, Maria E Gulinello, Geoffrey Perumal, Cedric Raine, Lauren Kozakiewicz, Julie Williamson, Bridget Shafit-Zagardo
The TAM (Tyro3, Axl, and MerTK) family of receptor tyrosine kinases (RTKs) and their ligands, Gas6 and ProS1, are important for innate immune responses and central nervous system (CNS) homeostasis. While only Gas6 directly activates Axl, ProS1 activation of Tyro3/MerTK can indirectly activate Axl through receptor heterodimerization. Therefore, we generated Gas6(-/-) Axl(-/-) double knockout (DKO) mice to specifically examine the contribution of this signaling axis while retaining ProS1 signaling through Tyro3 and MerTK...
September 19, 2017: Glia
https://www.readbyqxmd.com/read/28923597/targeting-demyelination-via-%C3%AE-secretases-promoting-sapp%C3%AE-release-to-enhance-remyelination-in-central-nervous-system
#8
Gemma Llufriu-Dabén, Alex Carrete, Elena Chierto, Jo Mailleux, Emeline Camand, Anne Simon, Tim Vanmierlo, Christiane Rose, Bernadette Allinquant, Jerome J A Hendriks, Charbel Massaad, Delphine Meffre, Mehrnaz Jafarian-Tehrani
Remyelination is an endogenous regenerative process of myelin repair in the central nervous system (CNS) with limited efficacy in demyelinating disorders. As strategies enhancing endogenous remyelination become a therapeutic challenge, we have focused our study on α-secretase-induced sAPPα release, a soluble endogenous protein with neuroprotective and neurotrophic properties. However, the role of sAPPα in remyelination is not known. Therefore, we investigated the remyelination potential of α-secretase-induced sAPPα release following CNS demyelination in mice...
September 15, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28923306/the-flavonoid-baicalein-attenuates-cuprizone-induced-demyelination-via-suppression-of-neuroinflammation
#9
Miho Hashimoto, Shinji Yamamoto, Kensuke Iwasa, Kota Yamashina, Masaki Ishikawa, Kei Maruyama, Francesca Bosetti, Keisuke Yoshikawa
Multiple sclerosis (MS) is a chronic demyelinating disease of the central nervous system characterized by recurrent and progressive demyelination/remyelination cycles, neuroinflammation, oligodendrocyte loss, and axonal pathology. Baicalein isolated from the roots of Scutellaria baicalensis has been shown to exert anti-inflammatory and anti-oxidant effects. The cuprizone model is an established mouse model of MS and causes demyelination and motor dysfunction to induce neuroinflammation such as glial activation and pro-inflammatory cytokine production...
September 15, 2017: Brain Research Bulletin
https://www.readbyqxmd.com/read/28921694/protease-activated-receptor-2-controls-myelin-development-resiliency-and-repair
#10
Hyesook Yoon, Maja Radulovic, Grant Walters, Alex R Paulsen, Kristen Drucker, Phillip Starski, Jianmin Wu, David P Fairlie, Isobel A Scarisbrick
Oligodendrocytes are essential regulators of axonal energy homeostasis and electrical conduction and emerging target cells for restoration of neurological function. Here we investigate the role of protease activated receptor 2 (PAR2), a unique protease activated G protein-coupled receptor, in myelin development and repair using the spinal cord as a model. Results demonstrate that genetic deletion of PAR2 accelerates myelin production, including higher proteolipid protein (PLP) levels in the spinal cord at birth and higher levels of myelin basic protein and thickened myelin sheaths in adulthood...
September 18, 2017: Glia
https://www.readbyqxmd.com/read/28919586/combination-of-myelin-basic-protein-gene-polymorphisms-with-hla-drb1-1501-in-iranian-patients-with-multiple-sclerosis
#11
Parham Nejati, Marzieh Attar, Maryam Rahimian, Davood Fathi, Majid Shahbazi
BACKGROUND: Multiple sclerosis (MS), as a multifactorial autoimmune disease with complex genetic basis, causes demyelination in the central nervous system via cytokine responses to myelin antigens. Myelin basic protein (MBP) is the main protein component of the myelin sheath. HLA-DRB (human leukocyte antigen-DR beta) alleles, particularly HLA-DRB1*1501, may be of significance in the pathogenesis of MS. OBJECTIVE: To examine the association of HLA-DRB1*1501 alleles and MBP VNTR (variable number tandem repeat) polymorphism with the MS susceptibility in Iranian population...
September 2017: Iranian Journal of Immunology: IJI
https://www.readbyqxmd.com/read/28919485/the-pathogenesis-of-staphylococcus-aureus-in-autoimmune-diseases
#12
REVIEW
Mir Naser Seyyed Mousavi, Bahareh Mehramuz, Javid Sadeghi, Naser Alizadeh, Mahin Ahangar Oskouee, Hossein Samadi Kafil
Autoimmune disease are defined as the attacks on host tissue by the immune system. Several factors, e.g. genetic and environmental triggers (in particular, viruses, bacteria, and other infectious pathogens) play a role in the development of autoimmune diseases. Bacterial infections are related to several autoimmune diseases, e.g. chronic inflammations and demyelination. Nowadays, an estimated 20-30% of the general human population carry Staphylococcus aureus (S. aureus). This organism can asymptomatically colonize healthy individuals...
September 14, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28919108/the-renin-angiotensin-system-regulates-neurodegeneration-in-a-mouse-model-of-optic-neuritis
#13
Xiaoli Guo, Kazuhiko Namekata, Atsuko Kimura, Chikako Harada, Takayuki Harada
The major role of the renin-angiotensin system (RAS), including that of angiotensin II (Ang II), the principal effector molecule, in the cardiovascular system is well known. Increasing evidence suggests that the RAS also plays a role in the development of autoimmune diseases. Optic neuritis (ie, inflammation of the optic nerve, with retinal ganglion cell [RGC] loss) is strongly associated with multiple sclerosis (MS). Herein, we investigated the effects of candesartan, an Ang II receptor antagonist, on optic neuritis in experimental autoimmune encephalomyelitis (EAE), an animal model of MS...
September 14, 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28919008/immunoadsorption-in-neurological-disorders
#14
REVIEW
Satoru Oji, Kyoichi Nomura
In recent years, immunoadsorption has been increasingly recognized as an alternative to therapeutic plasma exchange and used for the treatment of neurological disorders such as Guillain-Barré syndrome, chronic inflammatory demyelinating polyneuropathy, myasthenia gravis, neuromyelitis optica spectrum disorders, and multiple sclerosis, as well as autoimmune encephalitis. Unlike therapeutic plasma exchange, which requires fluid replacement with a blood solution such as fresh frozen plasma or albumin, immunoadsorption is a blood purification technique that enables the selective removal of humoral factors from separated plasma through a high-affinity adsorbent with tryptophan or phenylalanine...
August 26, 2017: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28919002/x-linked-adrenoleukodystrophy-in-a-chimpanzee-due-to-an-abcd1-mutation-reported-in-multiple-unrelated-humans
#15
Julian Curiel, Steven Jeffrey Steinberg, Sarah Bright, Ann Snowden, Ann B Moser, Florian Eichler, Holly A Dubbs, Joseph G Hacia, John J Ely, Jocelyn Bezner, Alisa Gean, Adeline Vanderver
BACKGROUND: X-linked adrenoleukodystrophy (X-ALD) is a genetic disorder leading to the accumulation of very long chain fatty acids (VLCFA) due to a mutation in the ABCD1 gene. ABCD1 mutations lead to a variety of phenotypes, including cerebral X-ALD and adrenomyeloneuropathy (AMN) in affected males and 80% of carrier females. There is no definite genotype-phenotype correlation with intrafamilial variability. Cerebral X-ALD typically presents in childhood, but can also present in juveniles and adults...
September 1, 2017: Molecular Genetics and Metabolism
https://www.readbyqxmd.com/read/28916318/matrix-metalloproteinases-2-and-9-in-campylobacter-jejuni-induced-paralytic-neuropathy-resembling-guillain-barr%C3%A3-syndrome-in-chickens
#16
Kishan Kumar Nyati, Kashi Nath Prasad, Vinita Agrawal, Nuzhat Husain
Inflammation in Guillain-Barré syndrome (GBS) is manifested by changes in matrix metalloproteinase (MMP) and pro-inflammatory cytokine expression. We investigated the expression of MMP-2, -9 and TNF-α and correlated it with pathological changes in sciatic nerve tissue from Campylobacter jejuni-induced chicken model for GBS. Campylobacter jejuni and placebo were fed to chickens and assessed for disease symptoms. Sciatic nerves were examined by histopathology and immunohistochemistry. Expressions of MMPs and TNF-α, were determined by real-time PCR, and activities of MMPs by zymography...
September 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28915963/hepcidin-and-metallothioneins-as-molecular-base-for-sex-dependent-differences-in-clinical-course-of-experimental-autoimmune-encephalomyelitis-in-chronic-iron-overload
#17
Božena Ćurko-Cofek, Tanja Grubić Kezele, Vesna Barac-Latas
Multiple sclerosis is a chronic demyelinating disease of the central nervous system characterised by inflammatory and degenerative changes. It is considered that disease arises from the influence of environmental factors on genetically susceptible individuals. Recent researches, using magnetic resonance imaging, connected iron deposits in different brain regions with demyelinating process in multiple sclerosis patients. Although iron is an essential trace element important for many biological functions it could be harmful because iron excess can induce the production of reactive oxygen species, development of oxidative stress and lipid peroxidation which leads to demyelination...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28914883/cidp-and-other-inflammatory-neuropathies-in-diabetes-diagnosis-and-management
#18
REVIEW
Yusuf A Rajabally, Mark Stettner, Bernd C Kieseier, Hans-Peter Hartung, Rayaz A Malik
Distal symmetric polyneuropathy (DSPN) is the most common neuropathy to occur in diabetes mellitus. However, patients with diabetes can also develop inflammatory neuropathies, the most common and most treatable of which is chronic inflammatory demyelinating polyradiculoneuropathy (CIDP). Whether diabetes is a risk factor for CIDP remains under debate. Early studies suggested that patients with diabetes were at increased risk of CIDP, but epidemiological studies failed to confirm the association, and subsequent data have re-opened the debate...
September 15, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28914199/clinical-applications-of-intravenous-immunoglobulins-in-child-neurology
#19
Maria Gogou, Efimia Papadopoulou-Alataki, Martha Spilioti, Sofia Alataki, Athanasios Evangeliou
BACKGROUND: While there are guidelines for the use of intravenous immunoglobulins in children with Guillain-Barre syndrome and myasthenia gravis based on high-level evidence studies, data is fewer for the majority of neurologic disorders in this age group. Neuronal antibodies are detected in children with seizures of autoimmune etiology. Intravenous immunoglobulins with their broad immunomodulatory mechanism of action could be ideally effective in different forms of immune-dysregulated intractable epilepsies such as autoimmune epilepsy and autoimmune Rasmussen encephalitis...
September 15, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28913765/treatment-of-theiler-s-virus-induced-demyelinating-disease-with-teriflunomide
#20
Francesca Gilli, Libin Li, Darlene B Royce, Krista D DiSano, Andrew R Pachner
Teriflunomide is an oral therapy approved for the treatment of relapsing remitting multiple sclerosis (MS), showing both anti-inflammatory and antiviral properties. Currently, it is uncertain whether one or both of these properties may explain teriflunomide's beneficial effect in MS. Thus, to learn more about its mechanisms of action, we evaluated the effect of teriflunomide in the Theiler's encephalomyelitis virus-induced demyelinating disease (TMEV-IDD) model, which is both a viral infection and an excellent model of the progressive disability of MS...
September 14, 2017: Journal of Neurovirology
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