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https://www.readbyqxmd.com/read/29782369/neuroimaging-in-epilepsy
#1
Meneka Kaur Sidhu, John S Duncan, Josemir W Sander
PURPOSE OF REVIEW: Epilepsy neuroimaging is important for detecting the seizure onset zone, predicting and preventing deficits from surgery and illuminating mechanisms of epileptogenesis. An aspiration is to integrate imaging and genetic biomarkers to enable personalized epilepsy treatments. RECENT FINDINGS: The ability to detect lesions, particularly focal cortical dysplasia and hippocampal sclerosis, is increased using ultra high-field imaging and postprocessing techniques such as automated volumetry, T2 relaxometry, voxel-based morphometry and surface-based techniques...
May 17, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29780332/myoclonic-jerks-and-schizophreniform-syndrome-case-report-and-literature-review
#2
Dominique Endres, Dirk-M Altenmüller, Bernd Feige, Simon J Maier, Kathrin Nickel, Sabine Hellwig, Jördis Rausch, Christiane Ziegler, Katharina Domschke, John P Doerr, Karl Egger, Ludger Tebartz van Elst
Background: Schizophreniform syndromes can be divided into primary idiopathic forms as well as different secondary organic subgroups (e.g., paraepileptic, epileptic, immunological, or degenerative). Secondary epileptic explanatory approaches have often been discussed in the past, due to the high rates of electroencephalography (EEG) alterations in patients with schizophrenia. In particular, temporal lobe epilepsy is known to be associated with schizophreniform symptoms in well-described constellations. In the literature, juvenile myoclonic epilepsy has been linked to emotionally unstable personality traits, depression, anxiety, and executive dysfunction; however, the association with schizophrenia is largely unclear...
2018: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/29778462/altered-mitochondrial-acetylation-profiles-in-a-kainic-acid-model-of-temporal-lobe-epilepsy
#3
Lindsey B Gano, Li-Ping Liang, Kristen Ryan, Cole R Michel, Joe Gomez, Athanassios Vassilopoulos, Nichole Reisdorph, Kristofer S Fritz, Manisha Patel
Impaired bioenergetics and oxidative damage in the mitochondria are implicated in the etiology of temporal lobe epilepsy, and hyperacetylation of mitochondrial proteins has recently emerged as a critical negative regulator of mitochondrial functions. However, the roles of mitochondrial acetylation and activity of the primary mitochondrial deacetylase, SIRT3, have not been explored in acquired epilepsy. We investigated changes in mitochondrial acetylation and SIRT3 activity in the development of chronic epilepsy in the kainic acid rat model of TLE...
May 17, 2018: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/29774448/the-expression-alteration-of-bc1-rna-and-its-interaction-with-eukaryotic-translation-initiation-factor-eif4a-post-status-epilepticus
#4
Xiangchang Zeng, Wenjing Zong, Qing Gao, Siyu Chen, Lulu Chen, Guirong Zeng, Weihua Huang, Zhenyu Li, Chang Zeng, Yuanyuan Xie, Xiaohui Li, Bo Xiao, Dongsheng-Ouyang, Kai Hu
Abnormal dendritic sprouting and synaptic remodelling are important pathological features of temporal lobe epilepsy. BC1 RNA is a translation repressor involved in the regulation of the dendritic protein synthesis and mRNA transport, which is essential for dendritic development and plasticity. The expression alteration of BC1 RNA in the pilocarpine induced epilepsy model remains unknown. It is unclear if the interactions between BC1 RNA and eukaryotic initiation factor 4A (eIF4A) exists in this model. The purpose of this study was to investigate the expression changes of BC1 RNA and its interactions with eIF4A post-status epilepticus (SE)...
May 17, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29774009/signaling-pathways-and-cellular-mechanisms-regulating-mossy-fiber-sprouting-in-the-development-of-epilepsy
#5
REVIEW
Christin M Godale, Steve C Danzer
The sprouting of hippocampal dentate granule cell axons, termed mossy fibers, into the dentate inner molecular layer is one of the most consistent findings in tissue from patients with mesial temporal lobe epilepsy. Decades of research in animal models have revealed that mossy fiber sprouting creates de novo recurrent excitatory connections in the hippocampus, fueling speculation that the pathology may drive temporal lobe epileptogenesis. Conducting definitive experiments to test this hypothesis, however, has been challenging due to the difficulty of dissociating this sprouting from the many other changes occurring during epileptogenesis...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29773221/are-there-distinct-forms-of-accelerated-forgetting-and-if-so-why
#6
Andrew R Mayes, Nicola M Hunkin, Claire Isaac, Nils Muhlert
Whether accelerated long-term forgetting (ALF) and classic organic amnesia, particularly hippocampal-amnesia, differ qualitatively or merely quantitatively is disputed. Qualitative difference accounts postulate that ALF patients show normal recall memory for at least minutes, during which hippocampal-amnesics already show accelerated forgetting and impaired recall but, thereafter, ALF patients show accelerated forgetting and impaired delayed recall. These delayed impairments may be more severe than those shown by hippocampal-amnesics...
April 19, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29772217/altered-activity-and-information-flow-in-the-default-mode-network-of-pilocarpine-induced-epilepsy-rats
#7
Yan Cui, Shuang Yu, Tianjiao Zhang, Yangsong Zhang, Yang Xia, Dezhong Yao, Daqing Guo
Temporal lobe epilepsy (TLE) is considered a brain activity disorder that is likely related to allomnesia and conscious disturbance. In rodents, TLE epileptiform discharges can be triggered by systemic administration of a dose of pilocarpine. However, how these pilocarpine-induced epileptiform discharges generate and propagate through the whole brain has not been well studied. In this study, we sought to assess alterations of activity and information flow in the default mode network (DMN) during TLE epileptiform discharges in pilocarpine-induced TLE rats...
May 14, 2018: Brain Research
https://www.readbyqxmd.com/read/29769251/systematic-review-and-network-meta-analysis-of-resective-surgery-for-mesial-temporal-lobe-epilepsy
#8
Puneet Jain, George Tomlinson, Carter Snead, Beate Sander, Elysa Widjaja
OBJECTIVE: To evaluate the effectiveness of anterior temporal lobectomy (ATL) versus selective amygdalohippocampectomy (SAH) on seizure-free outcome in patients with temporal lobe epilepsy, using both direct and indirect evidence from the literature. METHODS: MEDLINE, Embase and Cochrane databases were searched for original research articles and systematic reviews comparing ATL versus SAH, and ATL or SAH versus medical management (MM). The outcome was seizure freedom at 12 months of follow-up or longer...
May 16, 2018: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29767353/influences-of-temporal-lobe-epilepsy-and-temporal-lobe-resection-on-olfaction
#9
Richard L Doty, Isabelle Tourbier, Jessica K Neff, Jonathan Silas, Bruce Turetsky, Paul Moberg, Taehoon Kim, John Pluta, Jaqueline French, Ashwini D Sharan, Michael J Sperling, Natasha Mirza, Anthony Risser, Gordon Baltuch, John A Detre
Although temporal lobe epilepsy (TLE) and resection (TLR) impact olfactory eloquent brain structures, their influences on olfaction remain enigmatic. We sought to more definitively assess the influences of TLE and TLR on olfaction using three well-validated olfactory tests and measuring  the tests' associations with the volume of numerous temporal lobe brain structures. The University of Pennsylvania Smell Identification Test and an odor detection threshold test were administered to 71 TLE patients and 71 age- and sex-matched controls; 69 TLE patients and controls received an odor discrimination/memory test...
May 16, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29766029/seizure-suppressant-and-neuroprotective-effects-of-encapsulated-bdnf-producing-cells-in-a-rat-model-of-temporal-lobe-epilepsy
#10
Chiara Falcicchia, Giovanna Paolone, Dwaine F Emerich, Francesca Lovisari, William J Bell, Tracie Fradet, Lars U Wahlberg, Michele Simonato
Brain-derived neurotrophic factor (BDNF) may represent a therapeutic for chronic epilepsy, but evaluating its potential is complicated by difficulties in its delivery to the brain. Here, we describe the effects on epileptic seizures of encapsulated cell biodelivery (ECB) devices filled with genetically modified human cells engineered to release BDNF. These devices, implanted into the hippocampus of pilocarpine-treated rats, highly decreased the frequency of spontaneous seizures by more than 80%. These benefits were associated with improved cognitive performance, as epileptic rats treated with BDNF performed significantly better on a novel object recognition test...
June 15, 2018: Molecular Therapy. Methods & Clinical Development
https://www.readbyqxmd.com/read/29756178/hippocampal-deep-brain-stimulation-persistent-seizure-control-after-bilateral-extra-cranial-electrode-fracture
#11
Massimo Piacentino, Giacomo Beggio, Lara Zordan, Paolo Bonanni
Hippocampal deep brain stimulation (DBS) can provide an effective alternative for intractable temporal lobe epilepsy. In this case report, we describe a peculiar outcome after a post-traumatic wire-disconnection of a bilateral hippocampal DBS device. The patient presented a postoperative long-term significant reduction in seizure frequency even with an absent electric stimulation. This case gives the possibility to consider alternatives in epilepsy surgery, based on stimulation interference (lesional or electrical disturbing) in the epileptogenic zone...
May 13, 2018: Neurological Sciences
https://www.readbyqxmd.com/read/29755904/radiation-induced-cavernous-malformation-as-a-late-sequelae-of-stereotactic-radiosurgery-for-epilepsy
#12
Ethan A Winkler, Caleb Rutledge, Mariann Ward, Tarik Tihan, Patricia K Sneed, Nicholas Barbaro, Paul Garcia, Michael McDermott, Edward F Chang
Stereotactic radiosurgery (SRS) is a promising treatment for medically intractable mesial temporal lobe epilepsy. SRS for epilepsy has had an acceptable safety profile with reports of radiation-induced vascular malformations confined to central nervous system pathologies with prominent angiogenesis - namely, primary brain tumors, metastases, and arteriovenous malformations. Theoretical risks for radiation-induced lesions following radiosurgery for epilepsy have yet to be established. Of 13 patients treated in a pilot trial for medial temporal lobe epilepsy, one developed multiple delayed radiation-induced cavernous malformations following radiosurgery...
March 11, 2018: Curēus
https://www.readbyqxmd.com/read/29754261/compound-heterozygous-mutations-in-two-different-domains-of-aldh18a1-do-not-affect-the-amino-acid-levels-in-a-patient-with-hereditary-spastic-paraplegia
#13
Maria Steenhof, Maria Kibæk, Martin J Larsen, Mette Christensen, Allan Meldgaard Lund, Klaus Brusgaard, Jens Michael Hertz
Mutations in ALDH18A1 can cause autosomal recessive and dominant hereditary spastic paraplegia and autosomal recessive and dominant cutis laxa. ALDH18A1 encodes delta-1-pyrroline-5-carboxylate synthetase (P5CS), which consists of two domains, the glutamate 5-kinase (G5K) and the gamma-glutamyl phosphate reductase (GR5P) domain. The location of the mutations in the gene has influence on whether the amino acid levels are affected. Mutations affecting the G5K domain have previously been found to cause reduced plasma levels of proline, citrulline and arginine, whereas such effect is not seen with mutations affecting the GR5P domain...
May 12, 2018: Neurogenetics
https://www.readbyqxmd.com/read/29749462/immunotherapy-by-targeting-of-vgkc-complex-for-seizure-control-and-prevention-of-cognitive-impairment-in-a-mouse-model-of-epilepsy
#14
Zhiliang Fan, Xiaojuan Feng, Zhigang Fan, Xingyuan Zhu, Shaohua Yin
Epilepsy is a type of refractory neurologic disorder mental disease, which is associated with cognitive impairments and memory dysfunction. However, the potential mechanisms of epilepsy are not well understood. Previous evidence has identified the voltage gated potassium channel complex (VGKC) as a target in various cohorts of patients with epilepsy. In the present study, the efficacy of an antibody against VGKC (anti‑VGKC) for the treatment of epilepsy in mice was investigated. A mouse model of lithium‑pilocarpine temporal lobe epilepsy was established and anti‑VGKC treatment was administered for 30 days...
May 9, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29748835/canonical-transient-receptor-potential-channel-3-contributes-to-febrile-seizure-inducing-neuronal-cell-death-and-neuroinflammation
#15
Dan Sun, Hui Ma, Jiehui Ma, Jing Wang, Xiaolong Deng, Chunhui Hu, Xianbo Deng
Febrile seizure (FS) counts as the most common seizures symptom in children undergoing recurrent seizures, posing a high risk to developing subsequent temporal lobe epilepsy. Canonical transient receptor potential channel (TRPC) members are identified as the FS-related genes in hyperthermia prone rats. However, the role of TRPC3 in hyperthermia-induced FS rats remains unclear. In the present study, we investigated whether TRPC3 functionally contributes to the development of FSs. Elevated TRPC3 mRNA and protein levels was detected in hyperthermia-induced FS rats and rat hippocampal neuron cells...
May 10, 2018: Cellular and Molecular Neurobiology
https://www.readbyqxmd.com/read/29745545/-tract-based-spatial-statistics-analysis-on-the-white-matter-of-patients-with-temporal-lobe-epilepsy-and-automatic-recognition
#16
Di Zhao, Shengwen Guo, Congling Wu, Chunren Lai, Lina Cheng, Wensheng Wang
This study aims to determine the salient brain regions with abnormal changes in white matter structures from diffusion tensor imaging (DTI) images of the patients with temporal lobe epilepsy (TLE), and to discriminate the patients with TLE from normal controls (NCs). Firstly, the DTI images from 50 subjects (28 NCs and 22 TLE) were acquired. Secondly, the four measures including the fractional anisotropy (FA), the mean diffusivity (MD), the axial diffusivity (AD) and the radial diffusivity (RD) were calculated...
August 1, 2017: Sheng Wu Yi Xue Gong Cheng Xue za Zhi, Journal of Biomedical Engineering, Shengwu Yixue Gongchengxue Zazhi
https://www.readbyqxmd.com/read/29740014/different-patterns-of-epileptiform-like-activity-are-generated-in-the-sclerotic-hippocampus-from-patients-with-drug-resistant-temporal-lobe-epilepsy
#17
Selvin Z Reyes-Garcia, Carla A Scorza, Noemi S Araújo, Nancy N Ortiz-Villatoro, Anaclara Prada Jardim, Ricardo Centeno, Elza Márcia Targas Yacubian, Jean Faber, Esper A Cavalheiro
Human hippocampal slice preparations from patients with temporal lobe epilepsy (TLE) associated with hippocampal sclerosis (HS) are excellent material for the characterization of epileptiform-like activity. However, it is still unknown if hippocampal regions as cornu Ammonis (CA) 1, CA3 and CA4, generate population epileptiform-like activity. Here, we investigated epileptiform activities of the subiculum, CA1, CA2, CA3, CA4 (induced by elevation of extracellular potassium concentration) and the dentate gyrus (induced with hilar stimulation and elevation of potassium concentration) from sclerotic hippocampi of patients with drug-resistant TLE...
May 8, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29738432/neuroimmunology-research-a-report-from-the-cuban-network-of-neuroimmunology
#18
María de Los Angeles Robinson-Agramonte, Lourdes Lorigados Pedre, Orlando Ramón Serrano-Barrera
Neuroimmunology can be traced back to the XIX century through the descriptions of some of the disease’s models (e.g., multiple sclerosis and Guillain Barret syndrome, amongst others). The diagnostic tools are based in the cerebrospinal fluid (CSF) analysis developed by Quincke or in the development of neuroimmunotherapy with the earlier expression in Pasteur’s vaccine for rabies. Nevertheless, this field, which began to become delineated as an independent research area in the 1940s, has evolved as an innovative and integrative field at the shared edges of neurosciences, immunology, and related clinical and research areas, which are currently becoming a major concern for neuroscience and indeed for all of the scientific community linked to it...
May 8, 2018: Behavioral Sciences
https://www.readbyqxmd.com/read/29737480/notch-signaling-regulates-microglial-activation-and-inflammatory-reactions-in-a-rat-model-of-temporal-lobe-epilepsy
#19
Lei Wu, Yushuang Li, Minhua Yu, Fei Yang, Mengqi Tu, Haibo Xu
The inflammatory response mediated by microglia in the central nervous system is closely related to epilepsy. Notch signaling plays an important role in the microglial activation during hypoxia. This study aimed to investigate whether Notch signaling is involved in microglial activation and subsequent inflammation-related neuronal injury during the process of epileptogenesis in a rat model of temporal lobe epilepsy. By using western blotting, real-time quantitative PCR, immunohistochemistry and immunofluorescence labeling, we found that the expression of Notch signaling increased after status epilepticus and that a γ-secretase inhibitor could significantly inhibit the upregulation of Notch signaling, the activation of microglia, and the release of proinflammatory cytokines...
May 8, 2018: Neurochemical Research
https://www.readbyqxmd.com/read/29737364/control-of-excessive-neural-circuit-excitability-and-prevention-of-epileptic-seizures-by-endocannabinoid-signaling
#20
REVIEW
Yuki Sugaya, Masanobu Kano
Progress in research on endocannabinoid signaling has greatly advanced our understanding of how it controls neural circuit excitability in health and disease. In general, endocannabinoid signaling at excitatory synapses suppresses seizures by inhibiting glutamate release. In contrast, endocannabinoid signaling promotes seizures by inhibiting GABA release at inhibitory synapses. The physiological distribution of endocannabinoid signaling molecules becomes disrupted with the development of epileptic focus in patients with mesial temporal lobe epilepsy and in animal models of experimentally induced epilepsy...
May 8, 2018: Cellular and Molecular Life Sciences: CMLS
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