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https://www.readbyqxmd.com/read/28597112/serial-magnetic-resonance-study-in-super-refractory-status-epilepticus-progressive-involvement-of-striatum-and-pallidus-is-a-possible-predictive-marker-of-negative-outcome
#1
Alessandra Ferrari, Paolo Renzetti, Carlo Serrati, Roberto Fancellu
Super refractory status epilepticus (SRSE) is a life-threatening condition in which seizures do not respond to third-line anticonvulsant drug therapy. SRSE is associated with high mortality. How often SRSE occurs, what are the risk factors leading to this condition, and what is the effect on clinical outcome of failure to control seizures are poorly defined. Several studies have evaluated magnetic resonance imaging (MRI) findings in status epilepticus (SE), confirming that SE may directly cause selective neuronal necrosis due to excitotoxic mechanisms, as described in clinical case reports and experimental models...
June 8, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28526576/carvacrol-promotes-neuroprotection-in-the-mouse-hemiparkinsonian-model
#2
L M Dati, H Ulrich, C C Real, Z P Feng, H S Sun, L R Britto
Carvacrol is a monoterpene that has been linked to neuroprotection in several animal models of neurodegeneration, including ischemia, epilepsy and traumatic neuronal injury. In this study, we investigated the effects of carvacrol (i.p.) upon the neurodegeneration induced by 6-hydroxy-dopamine unilateral intrastriatal injections in mice. We have also used the cylinder test to assess the behavioral effects of carvacrol in that model of Parkinson's disease, and immunoblots to evaluate the levels of caspase-3 and TRPM7, one of major targets of carvacrol...
May 17, 2017: Neuroscience
https://www.readbyqxmd.com/read/28495374/metyrapone-prevents-brain-damage-induced-by-status-epilepticus-in-the-rat-lithium-pilocarpine-model
#3
Luis García-García, Ahmed A Shiha, Rubén Fernández de la Rosa, Mercedes Delgado, Ágata Silván, Pablo Bascuñana, Jens P Bankstahl, Francisca Gomez, Miguel A Pozo
The status epilepticus (SE) induced by lithium-pilocarpine is a well characterized rodent model of the human temporal lobe epilepsy (TLE) which is accompanied by severe brain damage. Stress and glucocorticoids markedly contribute to exacerbate neuronal damage induced by seizures but the underlying mechanisms are poorly understood. Herein we sought to investigate whether a single administration of metyrapone (150 mg/kg, i.p.), an 11β-hydroxylase inhibitor, enzyme involved in the peripheral and central synthesis of corticosteroids, had neuroprotective properties in this model...
May 8, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/28378878/network-evolution-in-mesial-temporal-lobe-epilepsy-revealed-by-diffusion-tensor-imaging
#4
Helen Wang, Yuegao Huang, Daniel Coman, Reshma Munbodh, Roni Dhaher, Hitten P Zaveri, Fahmeed Hyder, Tore Eid
OBJECTIVE: The objective of the present study is to identify novel, time-indexed imaging biomarkers of epileptogenesis in mesial temporal lobe epilepsy (MTLE). METHODS: We used high-resolution brain diffusion tensor imaging (DTI) of the translationally relevant methionine sulfoximine (MSO) brain infusion model of MTLE. MSO inhibits astroglial glutamine synthetase, which is deficient in the epileptogenic hippocampal formation of patients with MTLE. MSO-infused (epileptogenic) rats were compared with phosphate-buffered saline (PBS)-infused (nonepileptogenic) rats at early (3-4 days) and late (6-9 weeks) time points during epileptogenesis...
May 2017: Epilepsia
https://www.readbyqxmd.com/read/28343216/susceptibility-weighted-imaging-identifies-iron-oxide-labeled-human-neural-stem-cells-automated-computational-detection
#5
Mohsen Baghchechi, Amy Plaia, Mary Hamer, Nirmalya Ghosh, Stephen Ashwal, Andre Obenaus
Neonatal hypoxic-ischemic brain injury (HII) can lead to devastating neurological outcomes such as cerebral palsy, epilepsy, and mental retardation. Human neural stem cell (hNSC) therapy provides new hope for the treatment of neonatal HII. These multipotent cells can aid in HII recovery by activating multiple reparative mechanisms including secretion of neurotrophic factors that enhance brain repair and plasticity. For clinical use of implanted hNSCs, methods are required to identify, quantify, track, and visualize migration and replication in an automated and reproducible fashion...
2016: Developmental Neuroscience
https://www.readbyqxmd.com/read/28246328/synaptic-vesicle-glycoprotein-2c-sv2c-modulates-dopamine-release-and-is-disrupted-in-parkinson-disease
#6
Amy R Dunn, Kristen A Stout, Minagi Ozawa, Kelly M Lohr, Carlie A Hoffman, Alison I Bernstein, Yingjie Li, Minzheng Wang, Carmelo Sgobio, Namratha Sastry, Huaibin Cai, W Michael Caudle, Gary W Miller
Members of the synaptic vesicle glycoprotein 2 (SV2) family of proteins are involved in synaptic function throughout the brain. The ubiquitously expressed SV2A has been widely implicated in epilepsy, although SV2C with its restricted basal ganglia distribution is poorly characterized. SV2C is emerging as a potentially relevant protein in Parkinson disease (PD), because it is a genetic modifier of sensitivity to l-DOPA and of nicotine neuroprotection in PD. Here we identify SV2C as a mediator of dopamine homeostasis and report that disrupted expression of SV2C within the basal ganglia is a pathological feature of PD...
March 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28128443/potential-therapeutic-applications-of-adenosine-a2a-receptor-ligands-and-opportunities-for-a2a-receptor-imaging
#7
REVIEW
Aren van Waarde, Rudi A J O Dierckx, Xiaoyun Zhou, Shivashankar Khanapur, Hideo Tsukada, Kiichi Ishiwata, Gert Luurtsema, Erik F J de Vries, Philip H Elsinga
Adenosine A2A receptors (A2A Rs) are highly expressed in the human striatum, and at lower densities in the cerebral cortex, the hippocampus, and cells of the immune system. Antagonists of these receptors are potentially useful for the treatment of motor fluctuations, epilepsy, postischemic brain damage, or cognitive impairment, and for the control of an immune checkpoint during immunotherapy of cancer. A2A R agonists may suppress transplant rejection and graft-versus-host disease; be used to treat inflammatory disorders such as asthma, inflammatory bowel disease, and rheumatoid arthritis; be locally applied to promote wound healing and be employed in a strategy for transient opening of the blood-brain barrier (BBB) so that therapeutic drugs and monoclonal antibodies can enter the brain...
January 27, 2017: Medicinal Research Reviews
https://www.readbyqxmd.com/read/27979877/neural-progenitor-cells-in-cerebral-cortex-of-epilepsy-patients-do-not-originate-from-astrocytes-expressing-glast
#8
Meng Chen, Till B Puschmann, Ulrika Wilhelmsson, Charlotte Örndal, Marcela Pekna, Kristina Malmgren, Bertil Rydenhag, Milos Pekny
Adult neurogenesis in human brain is known to occur in the hippocampus, the subventricular zone, and the striatum. Neural progenitor cells (NPCs) were reported in the cortex of epilepsy patients; however, their identity is not known. Since astrocytes were proposed as the source of neural progenitors in both healthy and diseased brain, we tested the hypothesis that NPCs in the epileptic cortex originate from reactive, alternatively, de-differentiated astrocytes that express glutamate aspartate transporter (GLAST)...
December 14, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27875747/new-model-of-pharmacoresistant-seizures-induced-by-3-mercaptopropionic-acid-in-mice
#9
Andrea Enrique, Sofía Goicoechea, Rocío Castaño, Facundo Taborda, Luisa Rocha, Sandra Orozco, Elena Girardi, Luis Bruno Blanch
About 30% of the patients with epilepsy do not respond to clinically established anticonvulsants, despite having effective concentrations of the antiepileptic drug in plasma. Therefore, new preclinical models of epilepsy are needed to identify more efficacious treatments. We describe here a new drug-resistant seizure model in mice to be used at the early stages of pre-clinical trials. This model consists in inducing daily generalized seizures for 23 consecutive days by administration of 3-mercaptopropionic acid (MP)...
October 27, 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27871881/targeting-brain-and-peripheral-plasticity-of-the-lipidome-in-acute-kainic-acid-induced-epileptic-seizures-in-mice-via-quantitative-mass-spectrometry
#10
Raissa Lerner, Julia Post, Sebastian Loch, Beat Lutz, Laura Bindila
Epilepsy is a highly common chronic neurological disorder, manifested in many different types, affecting ~1% of the worldwide human population. The molecular mechanisms of epileptogenesis have not yet been clarified, and pharmacoresistance exhibited by 30-40% of epilepsy patients remains a major obstacle in medical care. Growing evidence indicates a role of lipid signalling pathways in epileptogenesis, thus lipid signals emerge as potential biomarkers for the onset and evolving course of the epileptic disorder, as well as potential therapeutic agents and targets...
February 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27452210/prospects-of-modeling-poststroke-epileptogenesis
#11
REVIEW
Doodipala Samba Reddy, Aamir Bhimani, Ramkumar Kuruba, Min Jung Park, Farida Sohrabji
This Review describes the current status of poststroke epilepsy (PSE) with an emphasis on poststroke epileptogenesis modeling for testing new therapeutic agents. Stroke is a leading cause of epilepsy in an aging population. Late-onset "epileptic" seizures have been reported in up to 30% cases after stroke. Nevertheless, the overall prevalence of PSE is 2-4%. Rodent models of stroke have contributed to our understanding of the relationship between seizures and the underlying ischemic damage to neurons. To understand whether acutely generated stroke events lead to a chronic phenotype more closely resembling PSE with recurrent seizures, a limited variety of approaches emerged in early 2000s...
April 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/26871960/proton-magnetic-resonance-spectroscopy-in-juvenile-myoclonic-epilepsy-a-systematic-review-and-meta-analysis
#12
REVIEW
Lin Zhang, Hua Li, Peiwei Hong, Xiaoyi Zou
PURPOSE: We sought to systematically review and perform a meta-analysis of the magnetic resonance spectroscopy (MRS) findings regarding juvenile myoclonic epilepsy (JME). METHODS: We searched for studies in the PubMed, Web of Science, and Embase electronic databases. Two authors collected articles and extracted data independently. A meta-analysis was performed for diverse metabolites in different brain areas. The mean difference (MD) and 95% confidence interval (CI) were used to compare continuous variables...
March 2016: Epilepsy Research
https://www.readbyqxmd.com/read/26537783/abnormal-brain-areas-common-to-the-focal-epilepsies-multivariate-pattern-analysis-of-fmri
#13
Mangor Pedersen, Evan K Curwood, David N Vaughan, Amir H Omidvarnia, Graeme D Jackson
Individuals with focal epilepsy have heterogeneous sites of seizure origin. However, there may be brain regions that are common to most cases of intractable focal epilepsy. In this study, we aim to identify these using multivariate analysis of task-free functional MRI. Fourteen subjects with extratemporal focal epilepsy and 14 healthy controls were included in the study. Task-free functional MRI data were used to calculate voxel-wise regional connectivity with regional homogeneity (ReHo) and weighted degree centrality (DCw), in addition to regional activity using fraction of amplitude of low-frequency fluctuations (fALFF)...
April 2016: Brain Connectivity
https://www.readbyqxmd.com/read/26370917/fmri-brain-response-during-sentence-reading-comprehension-in-children-with-benign-epilepsy-with-centro-temporal-spikes
#14
D Malfait, A Tucholka, S Mendizabal, J Tremblay, C Poulin, M Oskoui, M Srour, L Carmant, P Major, S Lippé
INTRODUCTION: Children with benign epilepsy with centro-temporal spikes (BECTS) often have language problems. Abnormal epileptic activity is found in central and temporal brain regions, which are involved in reading and semantic and syntactic comprehension. Using functional magnetic resonance imaging (fMRI), we examined reading networks in BECTS children with a new sentence reading comprehension task involving semantic and syntactic processing. METHOD: Fifteen children with BECTS (age=11y 1m ± 16 m; 12 boys) and 18 healthy controls (age=11 y 8m ± 20 m; 11 boys) performed an fMRI reading comprehension task in which they read a pair of syntactically complex sentences and decided whether the target sentence (the second sentence in the pair) was true or false with respect to the first sentence...
November 2015: Epilepsy Research
https://www.readbyqxmd.com/read/26333833/brain-regions-with-abnormal-network-properties-in-severe-epilepsy-of-lennox-gastaut-phenotype-multivariate-analysis-of-task-free-fmri
#15
Mangor Pedersen, Evan K Curwood, John S Archer, David F Abbott, Graeme D Jackson
OBJECTIVE: Lennox-Gastaut syndrome, and the similar but less tightly defined Lennox-Gastaut phenotype, describe patients with severe epilepsy, generalized epileptic discharges, and variable intellectual disability. Our previous functional neuroimaging studies suggest that abnormal diffuse association network activity underlies the epileptic discharges of this clinical phenotype. Herein we use a data-driven multivariate approach to determine the spatial changes in local and global networks of patients with severe epilepsy of the Lennox-Gastaut phenotype...
November 2015: Epilepsia
https://www.readbyqxmd.com/read/26220386/decreased-expression-of-hippocampal-na%C3%A2-%C2%BA-ca%C3%A2-%C3%A2-%C2%BA-exchanger-isoform-1-by-pentylenetetrazole-kindling-in-mice
#16
Takuya Kawanai, Atsuki Taruta, Aya Inoue, Ryo Watanabe, Yukio Ago, Hitoshi Hashimoto, Shigeru Hasebe, Yasuhiro Ooi, Kazuhiro Takuma, Toshio Matsuda
Previous studies have shown that inhibitors of the Na(+)/Ca(2+) exchanger (NCX) attenuate seizure activity in drug-induced epilepsy models, but the role of NCX in epilepsy is not fully understood. The present study examined the effects of pentylenetetrazole (PTZ)-induced kindling on the mRNA expression of NCX isoforms (NCX1, NCX2 and NCX3) in mouse brain. Chronic administration of PTZ at 40mg/kg resulted in kindling seizure development. It caused decreases in the mRNA levels of NCX1 and NCX2, but not NCX3, in the hippocampus...
September 2015: Epilepsy Research
https://www.readbyqxmd.com/read/26206493/modulation-of-schizophrenia-related-genes-in-the-forebrain-of-adolescent-and-adult-rats-exposed-to-maternal-immune-activation
#17
Ann M Hemmerle, Rebecca Ahlbrand, Stefanie L Bronson, Kerstin H Lundgren, Neil M Richtand, Kim B Seroogy
Maternal immune activation (MIA) is an environmental risk factor for schizophrenia, and may contribute to other developmental disorders including autism and epilepsy. Activation of pro-inflammatory cytokine systems by injection of the synthetic double-stranded RNA polyriboinosinic-polyribocytidilic acid (Poly I:C) mediates important neurochemical and behavioral corollaries of MIA, which have relevance to deficits observed in schizophrenia. We examined the consequences of MIA on forebrain expression of neuregulin-1 (NRG-1), brain-derived neurotrophic factor (BDNF) and their receptors, ErbB4 and trkB, respectively, genes associated with schizophrenia...
October 2015: Schizophrenia Research
https://www.readbyqxmd.com/read/26126612/altered-structural-and-functional-feature-of-striato-cortical-circuit-in-benign-epilepsy-with-centrotemporal-spikes
#18
Cheng Luo, Yaodan Zhang, Weifang Cao, Yue Huang, Fei Yang, Jianjun Wang, Shipeng Tu, Xiaoming Wang, Dezhong Yao
Benign epilepsy with centrotemporal spikes (BECT) is the most common form of childhood idiopathic focal epilepsy syndrome. We investigated quantitative evidence regarding brain morphology and functional connectivity features to provide insight into the neuroanatomical foundation of this disorder, using high resolution T1-weighted magnetic resonance imaging (MRI) and resting state functional MRI in 21 patients with BECT and in 20 healthy children. The functional connectivity analysis, seeded at the regions with altered gray-matter (GM) volume in voxel-based morphometry (VBM) analysis, was further performed...
September 2015: International Journal of Neural Systems
https://www.readbyqxmd.com/read/25982559/reduced-severity-of-ischemic-stroke-and-improvement-of-mitochondrial-function-after-dietary-treatment-with-the-anaplerotic-substance-triheptanoin
#19
T M Schwarzkopf, K Koch, J Klein
Triheptanoin, an oily substance, consists of glycerol bound to three molecules of heptanoic acid, a C7 odd-chain fatty acid. A triheptanoin-rich diet has anaplerotic effects because heptanoate metabolism yields succinate which delivers substrates to the Krebs cycle. While previous studies on the effects of triheptanoin focused on metabolic disorders and epilepsy, we investigated triheptanoin's effect on ischemic stroke. Mice were fed a triheptanoin-enriched diet for 14days; controls received soybean oil. Only mice fed triheptanoin had measurable quantities of odd-numbered fatty acids in the plasma and brain...
August 6, 2015: Neuroscience
https://www.readbyqxmd.com/read/25975143/-age-related-changes-in-behavior-in-monoamines-and-their-metabolites-content-and-in-density-of-d1-and-d2-dopamine-receptors-in-the-brain-structures-of-wag-rij-rats-with-depression-like-pathology
#20
K Yu Sarkisova, M A Kulikov, V S Kudrin, I S Midzyanovskaya, L M Birioukova
Behavior in the light-dark choice, open field, sucrose consumption/preference and forced swimming tests, monoamines and their metabolites content in 5 brain structures (prefrontal cortex, nucleus accumbens, striatum, hypothalamus, hippocampus), and density of D1- and D2-like dopamine receptors in the prefrontal cortex, nucleus accumbens and ventral tegmental area were studied in WAG/Rij rats at age of 36 days, 3 and 6 months. It has been found that with age, as far as spike-wave discharges aggravate, behavioral symptoms of depression (enhanced immobility in the forced swimming test, reduced sucrose consumption/preference) as well as a hypo-function of the mesolimbic dopaminergic brain system increase in WAG/Rij rats...
November 2014: Zhurnal Vyssheĭ Nervnoĭ Deiatelnosti Imeni I P Pavlova
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