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Post traumatic epilepsy

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https://www.readbyqxmd.com/read/28522734/voluntary-control-of-epileptiform-spike-wave-discharges-in-awake-rats
#1
Jeremy A Taylor, Krista M Rodgers, Florencia M Bercum, Carmen J Booth, F Edward Dudek, Daniel S Barth
Genetically inherited absence epilepsy in humans is typically characterized by brief (seconds) spontaneous seizures, which involve spike-wave discharges (SWDs) in the EEG and interruption of consciousness and ongoing behavior. Genetic (inbred) models of this disorder in rats have been used to examine mechanisms, comorbidities and anti-absence drugs. SWDs have also been proposed as models of complex partial seizures (CPSs) following traumatic brain injury (post-traumatic epilepsy; PTE). However, the ictal characteristics of these rat models, including SWDs and associated immobility, are also prevalent in healthy outbred laboratory rats...
May 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28412608/dsm-5-criteria-for-ptsd-in-parents-of-pediatric-patients-with-epilepsy-what-are-the-changes-with-respect-to-dsm-iv-tr
#2
Claudia Carmassi, Martina Corsi, Camilla Gesi, Carlo Antonio Bertelloni, Francesco Faggioni, Enrico Calderani, Gabriele Massimetti, Giuseppe Saggese, Alice Bonuccelli, Alessandro Orsini, Liliana Dell'Osso
Increasing literature suggests the need to explore for post-traumatic stress disorder (PTSD) and post-traumatic stress symptoms in parents and caregivers of children with acute and chronic illnesses but scant data are available on epilepsy. The aim of the present study was to estimate full and partial PTSD rates among parents of children with epilepsy comparing DSM-5 and DSM-IV-TR criteria. Further, the aim of the present study was to examine possible gender differences between mothers and fathers. Results showed 9...
May 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28406046/depdc5-as-a-potential-therapeutic-target-for-epilepsy
#3
Kenneth A Myers, Ingrid E Scheffer
Dishevelled, Egl-10 and Pleckstrin (DEP) domain-containing protein 5 (DEPDC5) is a protein subunit of the GTPase-activating proteins towards Rags 1 (GATOR1) complex. GATOR1 is a recently identified modulator of mechanistic target of rapamycin (mTOR) activity. mTOR is a key regulator of cell proliferation and metabolism; disruption of the mTOR pathway is implicated in focal epilepsy, both acquired and genetic. Tuberous sclerosis is the prototypic mTOR genetic syndrome with epilepsy, however GATOR1 gene mutations have recently been shown to cause lesional and non-lesional focal epilepsy...
April 13, 2017: Expert Opinion on Therapeutic Targets
https://www.readbyqxmd.com/read/28351681/regional-mechanical-properties-of-human-brain-tissue-for-computational-models-of-traumatic-brain-injury
#4
John D Finan, Sowmya N Sundaresh, Benjamin S Elkin, Guy M McKhann, Barclay Morrison
To determine viscoelastic shear moduli, stress relaxation indentation tests were performed on samples of human brain tissue resected in the course of epilepsy surgery. Through the use of a 500µm diameter indenter, regional mechanical properties were measured in cortical grey and white matter and subregions of the hippocampus. All regions were highly viscoelastic. Cortical grey matter was significantly more compliant than the white matter or hippocampus which were similar in modulus. Although shear modulus was not correlated with the age of the donor, cortex from male donors was significantly stiffer than from female donors...
March 25, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28330876/electrocorticographic-dynamics-as-a-novel-biomarker-in-five-models-of-epileptogenesis
#5
Dan Z Milikovsky, Itai Weissberg, Lyna Solomon-Kamintsky, Kristina Lippmann, Osnat Schefenbauer, Federica Frigerio, Massimo Rizzi, Liron Sheintuch, Daniel Zelig, Jonathan Ofer, Annamaria Vezzani, Alon Friedman
Post injury epilepsy (PIE) is a devastating sequela of various brain insults. While recent studies offer novel insights into the mechanisms underlying epileptogenesis and discover potential preventive treatments, the lack of PIE biomarkers hinders the clinical implementation of such treatments. Here we explored the biomarker potential of different electrographic features in five models of PIE. Electrocorticographic or intrahippocampal recordings of epileptogenesis (from the insult to the first spontaneous seizure) from two laboratories were analyzed in 3 mouse and 2 rat PIE models...
March 22, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28316319/epileptic-spasms-in-paediatric-post-traumatic-epilepsy-at-a-tertiary-referral-centre
#6
Jun T Park, Harry T Chugani
To recognize epileptic spasms (ES) as a seizure type after traumatic brain injury (TBI), accidental or non-accidental, in infants and children. In the process, we aim to gain some insight into the mechanisms of epileptogenesis in ES. A retrospective electronic chart review was performed at the Children's Hospital of Michigan from 2002 to 2012. Electronic charts of 321 patients were reviewed for evidence of post-traumatic epilepsy. Various clinical variables were collected including age at TBI, mechanism of trauma, severity of brain injury, electroencephalography/neuroimaging data, and seizure semiology...
March 17, 2017: Epileptic Disorders: International Epilepsy Journal with Videotape
https://www.readbyqxmd.com/read/28306623/risk-of-epilepsy-in-individuals-with-posttraumatic-stress-disorder-a-nationwide-longitudinal-study
#7
Yu-Hsiung Chen, Han-Ting Wei, Ya-Mei Bai, Ju-Wei Hsu, Kai-Lin Huang, Tung-Ping Su, Cheng-Ta Li, Wei-Chen Lin, Yi-Hui Wu, Tai-Long Pan, Tzeng-Ji Chen, Shih-Jen Tsai, Mu-Hong Chen
OBJECTIVE: Several cross-sectional studies reported a relationship between post-traumatic stress disorder (PTSD) and epilepsy. However, the temporal association between PTSD and epilepsy has rarely been investigated. We hypothesized that the risk of developing epilepsy later in life would be higher in patients with PTSD than in those without PTSD. METHODS: Using the Taiwan National Health Insurance Research Database, 6425 individuals with PTSD and 24,980 age-/sex-matched controls were enrolled between 2002 and 2009 in our study, and followed up to the end of 2011...
March 17, 2017: Psychosomatic Medicine
https://www.readbyqxmd.com/read/28225808/epileptogenesis-in-organotypic-hippocampal-cultures-has-limited-dependence-on-culture-medium-composition
#8
Jing Liu, Yero Saponjian, Mark M Mahoney, Kevin J Staley, Yevgeny Berdichevsky
Rodent organotypic hippocampal cultures spontaneously develop epileptiform activity after approximately 2 weeks in vitro and are increasingly used as a model of chronic post-traumatic epilepsy. However, organotypic cultures are maintained in an artificial environment (culture medium), which contains electrolytes, glucose, amino acids and other components that are not present at the same concentrations in cerebrospinal fluid (CSF). Therefore, it is possible that epileptogenesis in organotypic cultures is driven by these components...
2017: PloS One
https://www.readbyqxmd.com/read/28167446/various-modifications-of-the-intrahippocampal-kainate-model-of-mesial-temporal-lobe-epilepsy-in-rats-fail-to-resolve-the-marked-rat-to-mouse-differences-in-type-and-frequency-of-spontaneous-seizures-in-this-model
#9
Rebecca Klee, Claudia Brandt, Kathrin Töllner, Wolfgang Löscher
Temporal lobe epilepsy (TLE) is the most common type of acquired epilepsy in adults. TLE can develop after diverse brain insults, including traumatic brain injury, infections, stroke, or prolonged status epilepticus (SE). Post-SE rodent models of TLE are widely used to understand mechanisms of epileptogenesis and develop treatments for epilepsy prevention. In this respect, the intrahippocampal kainate model of TLE in mice is of interest, because highly frequent spontaneous electrographic seizures develop in the kainate focus, allowing evaluation of both anti-seizure and anti-epileptogenic effects of novel drugs with only short EEG recording periods, which is not possible in any other model of TLE, including the intrahippocampal kainate model in rats...
February 3, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28086980/inflammation-in-epileptogenesis-after-traumatic-brain-injury
#10
REVIEW
Kyria M Webster, Mujun Sun, Peter Crack, Terence J O'Brien, Sandy R Shultz, Bridgette D Semple
BACKGROUND: Epilepsy is a common and debilitating consequence of traumatic brain injury (TBI). Seizures contribute to progressive neurodegeneration and poor functional and psychosocial outcomes for TBI survivors, and epilepsy after TBI is often resistant to existing anti-epileptic drugs. The development of post-traumatic epilepsy (PTE) occurs in a complex neurobiological environment characterized by ongoing TBI-induced secondary injury processes. Neuroinflammation is an important secondary injury process, though how it contributes to epileptogenesis, and the development of chronic, spontaneous seizure activity, remains poorly understood...
January 13, 2017: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/28041798/early-seizures-predict-the-development-of-epilepsy-in-children-and-adolescents-with-stroke
#11
Ina Breitweg, Celina von Stülpnagel, Tom Pieper, Karen Lidzba, Hans Holthausen, Martin Staudt, Gerhard Kluger
PURPOSE: To identify risk factors for the development of epilepsy after pediatric stroke. METHODS: Retrospective analysis of hospital charts of 93 children and adolescents with post-neonatal non-traumatic stroke and a minimum follow-up of two years. Seizures during the first 48 h after onset of stroke symptoms were defined as "early seizures"; when two or more seizures occurred after this period, the patient was classified as "epileptic". RESULTS: Early seizures, young age at stroke and MRI evidence of cortical involvement were observed more frequently in the children who developed epilepsy...
May 2017: European Journal of Paediatric Neurology: EJPN
https://www.readbyqxmd.com/read/27909008/trajectory-of-parvalbumin-cell-impairment-and-loss-of-cortical-inhibition-in-traumatic-brain-injury
#12
Tsung-Hsun Hsieh, Henry Hing Cheong Lee, Mustafa Qadir Hameed, Alvaro Pascual-Leone, Takao K Hensch, Alexander Rotenberg
Many neuropsychiatric symptoms that follow traumatic brain injury (TBI), including mood disorders, sleep disturbance, chronic pain, and posttraumatic epilepsy (PTE) are attributable to compromised cortical inhibition. However, the temporal trajectory of cortical inhibition loss and its underlying mechanisms are not known. Using paired-pulse transcranial magnetic stimulation (ppTMS) and immunohistochemistry, we tracked functional and cellular changes of cortical inhibitory network elements after fluid-percussion injury (FPI) in rats...
November 30, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27810514/endogenous-cannabinoid-system-alterations-and-their-role-in-epileptogenesis-after-brain-injury-in-rat
#13
Xiu Wang, Yao Wang, Chao Zhang, Chang Liu, Hai-Feng Yang, Wen-Han Hu, Jian-Guo Zhang, Kai Zhang
Post-traumatic epilepsy (PTE) is one of the most common complications resulting from brain injury, however, antiepileptic drugs usually fail to prevent it. Several lines of evidence have demonstrated that the endogenous cannabinoid system (ECS) plays a pivotal role during epileptogenesis in several animal models. A recent study has shown that a cannabinoid type 1 (CB1) receptor antagonist could suppress long-term neuron hyperexcitability after brain injury, but the underlying mechanisms remain largely unknown...
December 2016: Epilepsy Research
https://www.readbyqxmd.com/read/27789118/adverse-structural-and-functional-effects-of-marijuana-on-the-brain-evidence-reviewed
#14
REVIEW
David E Mandelbaum, Suzanne M de la Monte
The growing use and legalization of cannabis are leading to increased exposures across all age groups, including in adolescence. The touting of its medicinal values stems from anecdotal reports related to treatment of a broad range of illnesses including epilepsy, multiple sclerosis, muscle spasms, arthritis, obesity, cancer, Alzheimer disease, Parkinson disease, post-traumatic stress, inflammatory bowel disease, and anxiety. However, anecdotal data and the high level of interest in this treatment must not obscure objective assessments of any potential and realized short- and long-term adverse effects of cannabis, particularly with respect to age of onset and chronicity of exposure...
January 2017: Pediatric Neurology
https://www.readbyqxmd.com/read/27707084/generalized-seizures-after-experimental-traumatic-brain-injury-occur-at-the-transition-from-slow-wave-to-rapid-eye-movement-sleep
#15
Pedro Andrade, Jari Nissinen, Asla Pitkanen
Sleep disturbances commonly occur after traumatic brain injury and may predispose patients to epileptic seizures. We hypothesized that unprovoked seizure occurrence after traumatic brain injury depends on the sleep-wake cycle, and that the electrographic characteristics of a given sleep stage provide biomarkers for post-traumatic epilepsy. We show in a rat lateral fluid-percussion model that 92% of spontaneous generalized seizures occur during the transition from stage III to rapid-eye-movement sleep. Moreover, a reduction in spindle duration and dominant frequency during the transition stage present as specific and sensitive non-invasive biomarkers for experimentally induced post-traumatic epilepsy with generalized electrographic seizures...
October 5, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/27672534/post-traumatic-drug-resistant-epilepsy-and-review-of-seizure-control-outcomes-from-blinded-randomized-controlled-trials-of-brain-stimulation-treatments-for-drug-resistant-epilepsy
#16
REVIEW
Michael Larkin, R Michael Meyer, Nicholas S Szuflita, Meryl A Severson, Zachary T Levine
BACKGROUND: Many post-traumatic epilepsy (PTE) patients become resistant to medications. Nervous stimulation as a treatment for drug-resistant epilepsy (DRE) is an active area of clinical investigation. OBJECTIVE: To summarize methods, reported seizure control outcome measures, and adverse events from blinded, randomized control trials (RCTs) for selected invasive brain stimulation (IBS) and non-invasive brain stimulation (NIBS) treatment options in patients with DRE...
August 22, 2016: Curēus
https://www.readbyqxmd.com/read/27566950/focal-drug-resistant-epilepsy-progress-in-care-and-barriers-a-morroccan-perspective
#17
Zouhayr Souirti, Ahmed Sghir, Rachid Belfkih, Ouafae Messouak
INTRODUCTION: The aim of this study is to determine the clinical, paraclinical, therapeutic and outcome aspects of drug resistant patients with epilepsy in our region and consequently to discuss methods that may improve the management of these patients. PATIENTS AND METHODS: This paper presents a retrospective study of 25 adult patients that were followed for focal drug resistant epilepsy in epileptology unit of the University Hospital of Fez, Morocco. RESULTS: This study recorded 25 patients including 48% of males and 52% of females...
December 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27561791/neuroprotective-levels-of-igf-1-exacerbate-epileptogenesis-after-brain-injury
#18
Yu Song, Corrin Pimentel, Katherine Walters, Lauren Boller, Shabnam Ghiasvand, Jing Liu, Kevin J Staley, Yevgeny Berdichevsky
Exogenous Insulin-Like Growth Factor-1 (IGF-1) is neuroprotective in animal models of brain injury, and has been considered as a potential therapeutic. Akt-mTOR and MAPK are downstream targets of IGF-1 signaling that are activated after brain injury. However, both brain injury and mTOR are linked to epilepsy, raising the possibility that IGF-1 may be epileptogenic. Here, we considered the role of IGF-1 in development of epilepsy after brain injury, using the organotypic hippocampal culture model of post-traumatic epileptogenesis...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27530814/analysis-of-post-traumatic-brain-injury-gene-expression-signature-reveals-tubulins-nfe2l2-nfkb-cd44-and-s100a4-as-treatment-targets
#19
Anssi Lipponen, Jussi Paananen, Noora Puhakka, Asla Pitkänen
We aimed to define the chronically altered gene expression signature of traumatic brain injury (TBI-sig) to discover novel treatments to reverse pathologic gene expression or reinforce the expression of recovery-related genes. Genome-wide RNA-sequencing was performed at 3 months post-TBI induced by lateral fluid-percussion injury in rats. We found 4964 regulated genes in the perilesional cortex and 1966 in the thalamus (FDR < 0.05). TBI-sig was used for a LINCS analysis which identified 11 compounds that showed a strong connectivity with the TBI-sig in neuronal cell lines...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27497924/hyperphosphorylated-tau-in-patients-with-refractory-epilepsy-correlates-with-cognitive-decline-a-study-of-temporal-lobe-resections
#20
Xin You Tai, Matthias Koepp, John S Duncan, Nick Fox, Pamela Thompson, Sallie Baxendale, Joan Y W Liu, Cheryl Reeves, Zuzanna Michalak, Maria Thom
SEE BERNASCONI DOI101093/AWW202 FOR A SCIENTIFIC COMMENTARY ON THIS ARTICLE: Temporal lobe epilepsy, the most prevalent form of chronic focal epilepsy, is associated with a high prevalence of cognitive impairment but the responsible underlying pathological mechanisms are unknown. Tau, the microtubule-associated protein, is a hallmark of several neurodegenerative diseases including Alzheimer's disease and chronic traumatic encephalopathy. We hypothesized that hyperphosphorylated tau pathology is associated with cognitive decline in temporal lobe epilepsy and explored this through clinico-pathological study...
September 2016: Brain: a Journal of Neurology
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