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White matter lesions on brain

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https://www.readbyqxmd.com/read/28345282/neuroplasticity-of-language-in-left-hemisphere-stroke-evidence-linking-subsecond-electrophysiology-and-structural-connections
#1
Vitória Piai, Lars Meyer, Nina F Dronkers, Robert T Knight
The understanding of neuroplasticity following stroke is predominantly based on neuroimaging measures that cannot address the subsecond neurodynamics of impaired language processing. We combined behavioral and electrophysiological measures and structural-connectivity estimates to characterize neuroplasticity underlying successful compensation of language abilities after left-hemispheric stroke. We recorded the electroencephalogram from patients with stroke lesions to the left temporal lobe and from matched controls during context-driven word retrieval...
March 27, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28344072/osteopontin-metallothionen-i-ii-interactions-in-experimental-autoimmunune-encephalomyelitis
#2
Hrvoje Jakovac, Tanja Grubić Kezele, Sandra Šućurović, Biserka Mulac-Jeričević, Biserka Radošević-Stašić
Osteopontin (OPN), an extracellular matrix (ECM) glyco-phosphoprotein, plays an important role in autoimmune-mediated demyelinating diseases, including multiple sclerosis and experimental autoimmune encephalomyelitis (EAE). As an integrin and CD44 binding protein it participates in bidirectional communication between the ECM and target cells and affects transduction pathways that maintain neuronal and immune cells homeostasis. Its biological activity is also heavily influenced by microenvironment, which stimulates the cleavage of OPN and changes its functions...
March 23, 2017: Neuroscience
https://www.readbyqxmd.com/read/28339164/are-schizophrenia-autistic-and-obsessive-spectrum-disorders-dissociable-on-the-basis-of-neuroimaging-morphological-findings-a-voxel-based-meta-analysis
#3
Franco Cauda, Tommaso Costa, Andrea Nani, Luciano Fava, Sara Palermo, Francesca Bianco, Sergio Duca, Karina Tatu, Roberto Keller
Schizophrenia spectrum disorder (SCZD), autism spectrum disorder (ASD), and obsessive-compulsive spectrum disorder (OCSD) are considered as three separate psychiatric conditions with, supposedly, different brain alterations patterns. From a neuroimaging perspective, this meta-analytic study aimed to address whether this nosographical differentiation is actually supported by different brain patterns of gray matter (GM) or white matter (WM) morphological alterations. We explored two possibilities: (a) to find out whether GM alterations are specific for SCZD, ASD, and OCSD; and (b) to associate the identified brain alteration patterns with cognitive dysfunctions by means of an analysis of lesion decoding...
March 24, 2017: Autism Research: Official Journal of the International Society for Autism Research
https://www.readbyqxmd.com/read/28334875/white-matter-changes-in-paediatric-multiple-sclerosis-and-monophasic-demyelinating-disorders
#4
Giulia Longoni, Robert A Brown, Parya MomayyezSiahkal, Colm Elliott, Sridar Narayanan, Amit Bar-Or, Ruth Ann Marrie, E Ann Yeh, Massimo Filippi, Brenda Banwell, Douglas L Arnold
Most children who experience an acquired demyelinating syndrome of the central nervous system will have a monophasic disease course, with no further clinical or radiological symptoms. A subset will be diagnosed with multiple sclerosis, a life-long disorder. Using linear mixed effects models we examined longitudinal diffusion properties of normal-appearing white matter in 505 serial scans of 132 paediatric participants with acquired demyelinating syndromes followed for a median of 4.4 years, many from first clinical presentation, and 106 scans of 80 healthy paediatric participants...
March 14, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28334869/emerging-concepts-in-sporadic-cerebral-amyloid-angiopathy
#5
Andreas Charidimou, Gregoire Boulouis, M Edip Gurol, Cenk Ayata, Brian J Bacskai, Matthew P Frosch, Anand Viswanathan, Steven M Greenberg
Sporadic cerebral amyloid angiopathy is a common, well-defined small vessel disease and a largely untreatable cause of intracerebral haemorrhage and contributor to age-related cognitive decline. The term 'cerebral amyloid angiopathy' now encompasses not only a specific cerebrovascular pathological finding, but also different clinical syndromes (both acute and progressive), brain parenchymal lesions seen on neuroimaging and a set of diagnostic criteria-the Boston criteria, which have resulted in increasingly detected disease during life...
March 13, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28322870/painless-bilateral-visual-loss-in-a-33-year-old-woman-with-severe-arterial-hypotension
#6
Olaia Subirà, Silvia Muñoz, Juan José Sánchez, Paloma Puyalto, Andrew G Lee
A 32-year-old woman experienced dizziness and headache for 5 months. She also complained of painless, progressive bilateral visual loss for several weeks. Prior to developing the initial symptoms, she had an uncomplicated pregnancy except for dizziness and systemic hypotension during the first term. Fundus examination disclosed prominent retinal arteries, as well diffuse microaneurysms, widespread intraretinal hemorrhages, and hyperemic optic discs. Brain magnetic resonance imaging revealed multiple supratentorial white matter lesions suggestive of ischemic strokes...
March 16, 2017: Survey of Ophthalmology
https://www.readbyqxmd.com/read/28319253/heat-shock-protein-expression-in-cerebral-x-linked-adrenoleukodystrophy-reveals-astrocyte-stress-prior-to-myelin-loss
#7
Anna Lena Görtz, Laura A N Peferoen, Wouter H Gerritsen, Johannes M van Noort, Marianna Bugiani, Sandra Amor
AIMS: X-linked adrenoleukodystrophy (X-ALD) is a genetic white matter disorder in which demyelination occurs due to accumulation of very long chain fatty acids. Inflammation in the brain white matter is a hallmark of the pathology of cerebral X-ALD, but the underlying pathogenic mechanisms are still largely unknown. In other inflammatory demyelinating disorders such as multiple sclerosis, the expression of heat shock proteins (HSPs) in combination with interferon-γ (IFN-γ) has been suggested to play a prominent role in the initiation of demyelination and inflammation...
March 20, 2017: Neuropathology and Applied Neurobiology
https://www.readbyqxmd.com/read/28316994/multiple-factors-involved-in-the-pathogenesis-of-white-matter-lesions
#8
REVIEW
Jing Lin, Dilong Wang, Linfang Lan, Yuhua Fan
White matter lesions (WMLs), also known as leukoaraiosis (LA) or white matter hyperintensities (WMHs), are characterized mainly by hyperintensities on T2-weighted or fluid-attenuated inversion recovery (FLAIR) images. With the aging of the population and the development of imaging technology, the morbidity and diagnostic rates of WMLs are increasing annually. WMLs are not a benign process. They clinically manifest as cognitive decline and the subsequent development of dementia. Although WMLs are important, their pathogenesis is still unclear...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28302760/-11-c-pbr28-or-18-f-pbr111-detect-white-matter-inflammatory-heterogeneity-in-multiple-sclerosis
#9
Gourab Datta, Alessandro Colasanti, Nicola Kalk, David R Owen, Gregory Scott, Eugenii Ilan A Rabiner, Roger Gunn, Anne Lingford-Hughes, Omar Malik, Olga Ciccarelli, Richard Nicholas, Lei Nie, Marco Battaglini, Nicola De Stefano, Paul Matthews
Objective: To assess microglial activation in lesions and in normal appearing white matter of multiple sclerosis (MS) patients using positron emission tomography (PET). Methods: 34 MS patients (7 with secondary progressive MS (SPMS), 27 with relapsing remitting MS (RRMS)) and 30 healthy volunteers, genetically stratified for translocator protein (TSPO), binding status underwent PET scanning with TSPO radioligands ((11)C-PBR28 or (18)F-PBR111). Regional TSPO availability was measured as a distribution volume ratio (DVR) relative to the caudate (a pseudo-reference region)...
March 16, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28302146/relationship-of-acute-axonal-damage-wallerian-degeneration-and-clinical-disability-in-multiple-sclerosis
#10
Shailender Singh, Tobias Dallenga, Anne Winkler, Shanu Roemer, Brigitte Maruschak, Heike Siebert, Wolfgang Brück, Christine Stadelmann
BACKGROUND: Axonal damage and loss substantially contribute to the incremental accumulation of clinical disability in progressive multiple sclerosis. Here, we assessed the amount of Wallerian degeneration in brain tissue of multiple sclerosis patients in relation to demyelinating lesion activity and asked whether a transient blockade of Wallerian degeneration decreases axonal loss and clinical disability in a mouse model of inflammatory demyelination. METHODS: Wallerian degeneration and acute axonal damage were determined immunohistochemically in the periplaque white matter of multiple sclerosis patients with early actively demyelinating lesions, chronic active lesions, and inactive lesions...
March 17, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28302008/mitochondria-targeted-antioxidants-as-a-prospective-therapeutic-strategy-for-multiple-sclerosis
#11
Elena K Fetisova, Boris V Chernyak, Galina A Korshunova, Maria S Muntyan, Vladimir P Skulachev
BACKGROUND: Multiple sclerosis (MS) is one of the most widespread chronic neurological diseases that manifests itself by progressive demyelination in the central nervous system. The study of MS pathogenesis begins with the onset of the relapsing-remitting phase of the disease, which becomes apparent due to microglia activation, neuroinflammation and demyelination/remyelination in the white matter. The following progressive phase is accompanied by severe neurological symptoms when demyelination and neurodegeneration are spread to both gray and white matter...
March 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28290939/susceptibility-weighted-imaging-and-white-matter-abnormality-findings-in-service-members-with-persistent-cognitive-symptoms-following-mild-traumatic-brain-injury
#12
David F Tate, Maria Gusman, Jonathan Kini, Matthew Reid, Carmen S Velez, Ann Marie Drennon, Douglas B Cooper, Jan E Kennedy, Amy O Bowles, Erin D Bigler, Jeffrey D Lewis, John Ritter, Gerald E York
Mild traumatic brain injury (mTBI) is a major health concern among active duty service members and Veterans returning from combat operations, and it can result in variable clinical and cognitive outcomes. Identifying biomarkers that can improve diagnosis and prognostication has been at the forefront of recent research efforts. The purpose of this study was to compare the sensitivity and specificity of abnormalities identified using more traditional magnetic resonance imaging (MRI) sequences such as fluid attenuation inversion recovery (FLAIR) to more advanced MRI sequences such as susceptibility weighted imaging (SWI) among a cohort of active duty service members experiencing persistent cognitive symptoms after mTBI...
March 2017: Military Medicine
https://www.readbyqxmd.com/read/28285092/visceral-to-subcutaneous-fat-ratio-is-independently-related-to-small-and-large-cerebrovascular-lesions-even-in-healthy-subjects
#13
Satoshi Higuchi, Yusuke Kabeya, Kiyoe Kato
BACKGROUND AND AIMS: The severity of obesity is evaluated by visceral-to-subcutaneous fat ratio (VS ratio), which may be useful for predicting atherosclerosis. However, it is unclear how VS ratio affects different types of cerebrovascular lesions. This study was conducted to evaluate the clinical impact of visceral fat accumulation on the cerebrovascular lesions. METHODS: This cross-sectional study included 980 apparently healthy Japanese adults who underwent a health check-up program focused toward atherosclerosis, between 2011 and 2014...
March 2, 2017: Atherosclerosis
https://www.readbyqxmd.com/read/28284341/mog-antibody-associated-demyelinating-disease-of-the-cns-a-clinical-and-pathological-study-in-chinese-han-patients
#14
Lei Zhou, Yongheng Huang, Haiqing Li, Jie Fan, Jingzi Zhangbao, Hai Yu, Yuxin Li, Jiahong Lu, Chongbo Zhao, Chuanzhen Lu, Min Wang, Chao Quan
We aim to evaluate the clinical relevance of MOG-ab in a cohort of Chinese Han adults with CNS inflammatory demyelinating diseases (IDDs). MOG-ab and AQP4-ab were examined through a fixed cell based indirect immune-fluorescence assay in 86 patients with CNS-IDDs. MOG-ab was positive in 12 patients, while AQP4-ab was positive in 31 patients; none double positives. Optic neuritis (ON) was the most frequent symptom at onset (75.0%) or during the whole disease course (83.3%) of MOG-ab associated IDDs (MOG-IDDs); 79...
April 15, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/28282668/plasticity-during-early-brain-development-is-determined-by-ontogenetic-potential
#15
Ingeborg Krägeloh-Mann, Karen Lidzba, Marina A Pavlova, Marko Wilke, Martin Staudt
Two competing hypotheses address neuroplasticity during early brain development: the "Kennard principle" describes the compensatory capacities of the immature developing CNS as superior to those of the adult brain, whereas the "Hebb principle" argues that the young brain is especially sensitive to insults. We provide evidence that these principles are not mutually exclusive. Following early brain lesions that are unilateral, the brain can refer to homotopic areas of the healthy hemisphere. This potential for reorganization is unique to the young brain but available only when, during ontogenesis of brain development, these areas have been used for the functions addressed...
April 2017: Neuropediatrics
https://www.readbyqxmd.com/read/28280460/androstenediol-reduces-demyelination-induced-axonopathy-in-the-rat-corpus-callosum-impact-on-microglial-polarization
#16
Samah Kalakh, Abdeslam Mouihate
Aims: We have previously shown that the neurosteroid androstenediol (ADIOL) promotes remyelination following gliotoxin-induced demyelination. However, the impact of this ADIOL on axonal recovery is not yet known. In the present study, we investigated the impact of ADIOL on axonal integrity following a focal demyelination in the corpus callosum. Methods: A 2 μl solution of either ethidium bromide (EB; 0.04%) or pyrogen-free saline were stereotaxically injected into the corpus callosum of Sprague Dawley rats...
2017: Frontiers in Cellular Neuroscience
https://www.readbyqxmd.com/read/28273764/extensive-white-matter-lesions-after-2%C3%A2-years-of-fingolimod-progressive-multifocal-leukoencephalopathy-or-ms-relapse
#17
Marine Boudot de la Motte, Céline Louapre, Anne Bertrand, Pauline Reach, Catherine Lubetzki, Caroline Papeix, Elisabeth Maillart
BACKGROUND: Fingolimod is a widely used treatment for highly active relapsing-remitting multiple sclerosis. OBJECTIVES: To describe the case of a 27-year-old patient treated for more than 2 years by Fingolimod, who presented hemiplegia and speech disturbances associated with extensive white matter lesions on brain magnetic resonance imaging (MRI). METHODS: Case study. RESULTS: Although initial presentation questioned the possibility of progressive multifocal leukoencephalopathy, final diagnosis was multiple sclerosis (MS) relapse...
April 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28262185/cognitive-sequelae-of-methanol-poisoning-involve-executive-dysfunction-and-memory-impairment-in-cross-sectional-and-long-term-perspective
#18
O Bezdicek, J Michalec, M Vaneckova, J Klempir, I Liskova, Z Seidl, B Janikova, M Miovsky, J Hubacek, P Diblik, P Kuthan, A Pilin, I Kurcova, Z Fenclova, V Petrik, T Navratil, D Pelclova, S Zakharov, E Ruzicka
Methanol poisoning leads to lesions in the basal ganglia and subcortical white matter, as well as to demyelination and atrophy of the optic nerve. However, information regarding cognitive deficits in a large methanol sample is lacking. The principal aim of the present study was to identify the cognitive sequelae of methanol poisoning and their morphological correlates. A sample of 50 patients (METH; age 48 ± 13 years), 3-8 months after methanol poisoning, and 57 control subjects (CS; age 49 ± 13 years) were administered a neuropsychological battery...
March 2017: Alcohol
https://www.readbyqxmd.com/read/28259055/hypothalamic-tumors-impact-gray-and-white-matter-volumes-in-fronto-limbic-brain-areas
#19
Jale Özyurt, Hermann L Müller, Monika Warmuth-Metz, Christiane M Thiel
Patients with hypothalamic involvement of a sellar/parasellar tumor often suffer from cognitive and social-emotional deficits that a lesion in the hypothalamus cannot fully explain. It is conceivable that these deficits are partly due to distal changes in hypothalamic networks, evolving secondary to a focal lesion. Focusing on childhood-onset craniopharyngioma patients, we aimed at investigating the impact of hypothalamic lesions on gray and white matter areas densely connected to the hypothalamus, and to relate structural changes to neuropsychological deficits frequently observed in patients...
February 3, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28249729/both-hemorrhagic-and-non-hemorrhagic-traumatic-mri-lesions-are-associated-with-the-microstructural-damage-of-the-normal-appearing-white-matter
#20
Arnold Toth, Balint Kornyei, Noemi Kovacs, Tamas Rostas, Andras Buki, Tamas Doczi, Peter Bogner, Attila Schwarcz
Traumatic microbleeds (TMBs) and non-hemorrhagic lesions (NHLs) on MRI are regarded as surrogate markers of diffuse axonal injury. However, the actual relation between lesional and diffuse pathology remained unclear, since lesions were related to clinical parameters, largely influenced by extracranial factors. The aim of this study is to directly compare TMBs, NHLs and their regional features with the co-existing diffuse injury of the normal appearing white matter (NAWM) as measured by diffusion tensor imaging (DTI)...
February 27, 2017: Behavioural Brain Research
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