Abstract：
:Activation of group I metabotropic glutamate receptors (mGluRs) produces a long-lasting change in hippocampal excitability that persists in the absence of an agonist. Exposure to the group I mGluR agonist dihydroxyphenylglycine (DHPG) results in the induction of spontaneously occurring epileptiform activity in the CA3 region of rat hippocampal slices that includes both brief interictal discharges and longer synchronous activity that resembles seizure or ictal activity (>2s duration oscillating at a frequency greater than 2 Hz). We evaluated activity-dependent mechanisms for the induction and maintenance of epileptiform activity. Both the induction and maintenance of epileptiform activity was blocked by inhibiting action potential generation with tetrodotoxin or substitution of sodium with choline or by blocking AMPA/KA ionotropic glutamate receptors. The ictal epileptiform activity induced by DHPG was composed of synchronous synaptic activity. Antagonists of group I mGluRs, either mGluR1 or mGluR5, suppressed the induction of ictal activity but had minimal effects on the maintenance of epileptiform activity. Group I mGluRs activate phospholipase C and inhibition of phospholipase C suppressed the induction but not the maintenance of epileptiform activity. Taken together, these results point to a use dependent change in CA3 neuronal network function produced by group I mGluR activation. Furthermore, activation of both mGluR1 and 5 is required to induce ictal discharges. The induction of epileptiform activity by DHPG is an in vitro model of epileptogenesis, and the development of epileptiform activity in this model depends on neuronal activity and synaptic transmission.
journal_name
Epilepsy Resjournal_title
Epilepsy researchauthors
Karr L,Rutecki PAdoi
10.1016/j.eplepsyres.2008.04.005subject
Has Abstractpub_date
2008-09-01 00:00:00pages
14-23issue
1eissn
0920-1211issn
1872-6844pii
S0920-1211(08)00093-4journal_volume
81pub_type
杂志文章abstract：BACKGROUND:GRIN-related developmental-epileptic encephalopathies are associated with a spectrum of neurodevelopmental disorders, including intellectual disability, epilepsy including continuous spike-and-wave during sleep syndrome (CSWS), or epilepsy-aphasia spectrum phenotypes such as in Landau-Kleffner syndrome. Effi...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2020.106325
更新日期：2020-07-01 00:00:00
abstract：:The rat lateral fluid-percussion injury (FPI) model has been used extensively to study post-traumatic epilepsy (PTE). Epidemiological studies have reported that the risk of PTE is higher after more severe injury. Adult, male Wistar rats subjected to different atmospheric pressures of injury during FPI showed great var...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2018.09.005
更新日期：2018-11-01 00:00:00
abstract：:In the immature brain the neurotransmitter γ-amino butyric acid (GABA) mediates a membrane depolarization and can contribute to both, inhibition and excitation. Therefore the consequences of a positive modulation of GABA(A) receptors by neurosteroids on epileptiform activity are hard to predict. In order to analyze wh...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2019.106196
更新日期：2019-11-01 00:00:00
abstract：BACKGROUND:Little is known, so far, about the cerebral structural abnormalities in drug-naïve patients with childhood absence epilepsy (CAE). We aimed to investigate regional grey matter (GM) volume differences using voxel-based morphometry (VBM) in patients and closely matched healthy control subjects. METHODS:Twenty...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2016.05.003
更新日期：2016-08-01 00:00:00
abstract：:Periventricular nodular heterotopia (PVNH) is a neuronal migrational disorder often associated with pharmacoresistant epilepsy (PRE). Resective surgery for PVNH is limited by its deep location, and the overlying eloquent cortex or white matter. Stereotactic MR guided laser interstitial thermal therapy (MRgLITT) has re...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2014.01.009
更新日期：2014-03-01 00:00:00
abstract：:Treating a patient with antiepileptic drugs (AEDs) may give rise to unexpected life-threatening adverse events. Despite extensive experimental and clinical testing to ensure safety, most AEDs on the market have been associated with cases of severe cutaneous reactions, serious hematological disorders, or hepatic failur...
journal_title：Epilepsy research
pub_type： 杂志文章,评审
doi：10.1016/s0920-1211(01)00306-0
更新日期：2001-11-01 00:00:00
abstract：SUMMARY:Autosomal dominant nocturnal frontal lobe epilepsy (ADNFLE) is known to be partly caused by mutations in the transmembrane domain (TM) 1-3 of the genes of the neuronal nicotinic acetylcholine receptor (nAChR) alpha4-subunit (CHRNA4), beta2-subunit (CHRNB2) and alpha2-subunit (CHRNA2). The more common cases of s...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2008.10.009
更新日期：2009-02-01 00:00:00
abstract：OBJECTIVE:The NTRK2 gene encodes a member of the neurotrophic tyrosine kinase receptor family known as TrkB. It is a membrane-associated receptor with signaling and cellular differentiation properties that has been involved in neuropsychiatric disorders, including epilepsy. We report here the frequencies of NTRK2 allel...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2017.08.010
更新日期：2017-11-01 00:00:00
abstract：:Seizures induced by the convulsant methionine sulfoximine (MSO) resemble human "grand mal" epilepsy, and brain glutamine synthetase is inhibited. We recently selected two inbred lines of mice: sensitive to MSO (MSO-Fast) and resistant (MSO-Slow). In the present study, the selection pressure was increased and consangui...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2011.08.012
更新日期：2012-01-01 00:00:00
abstract：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 ind...
journal_title：Epilepsy research
pub_type： 杂志文章,meta分析,评审
doi：10.1016/j.eplepsyres.2016.01.004
更新日期：2016-03-01 00:00:00
abstract：BACKGROUND:People with epilepsy may experience an altered pattern of mortality due to cancer. We determined cancer mortality in two distinct populations with epilepsy: (i) an institutionalised cohort with severe epilepsy (SEC) and (ii) another cohort with presumed milder epilepsy (MEC). METHODS:Mortality data from 197...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2008.11.001
更新日期：2009-02-01 00:00:00
abstract：AIM:Vitamin D (Vit D) has been considered as a neurosteroid and has a pivotal role in neuroprotection including epilepsy. Vit D regulator acts via a Vit D receptor (VDR). WAG/Rij rats have a genetically epileptic model of absence epilepsy with comorbidity of depression. The aim of the present study was to investigate t...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2019.106208
更新日期：2019-11-01 00:00:00
abstract：:Biochemical studies have indicated that norepinephrine is present in lower levels in certain brain regions of genetically epilepsy-prone rats (GEPR-9s) as compared to non-epileptic Sprague-Dawley (SD) rats. In this study, the immunocytochemical localization of dopamine beta-hydroxylase (DBH), the synthesizing enzyme f...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(89)90001-6
更新日期：1989-11-01 00:00:00
abstract：:Comorbid conditions may affect the quality of life in persons with epilepsy (PWE) more than seizures. Using legally mandated healthcare encounter data, somatic, psychiatric, and neurodevelopmental comorbidities in a large population-based cohort of PWE, were compared to persons with migraine (PWM), a similar neurologi...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2013.12.002
更新日期：2014-02-01 00:00:00
abstract：:Dogs were treated with clorazepate, which is known to be completely metabolized to desmethyldiazepam. 2 mg/kg t.i.d. were given orally for 5-6 weeks, a dose regimen providing plasma concentrations of desmethyldiazepam in the range known to be therapeutic in man. The rate of development of tolerance to the anticonvulsa...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(89)90042-9
更新日期：1989-03-01 00:00:00
abstract：PURPOSE:The aim of this study was to evaluate volumetric proton magnetic resonance spectroscopic imaging (MRSI) for localization of epileptogenic foci in neocortical epilepsy. METHODS:Twenty-five subjects reporting seizures considered to be of neocortical origin were recruited to take part in a 3-T MR study that inclu...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.10.009
更新日期：2010-02-01 00:00:00
abstract：:This investigation of cognitive functioning in patients with symptomatic localization-related (partial) epilepsy prior to administration of antiepileptic medication is part of a nationwide prospective, double-blind study of drug efficacy and longitudinal changes in cognition associated with seizure disorders. Recently...
journal_title：Epilepsy research
pub_type： 临床试验,杂志文章,多中心研究
doi：10.1016/s0920-1211(97)00091-0
更新日期：1998-03-01 00:00:00
abstract：:Surgical treatment of mesial temporal lobe epilepsy (mTLE) patients involves the removal either of the left or the right hippocampus. Since the mesial temporal lobe is responsible for emotion recognition abilities, we aimed to assess facial emotion recognition (FER) in two homogeneous patient cohorts that differed onl...
journal_title：Epilepsy research
pub_type： 杂志文章,多中心研究
doi：10.1016/j.eplepsyres.2015.01.002
更新日期：2015-03-01 00:00:00
abstract：:In the brain, injury-induced gliosis and axonal sprouting have been regarded as age-dependent repairing processes with, unfortunately, epileptogenic effects. The present study examines whether brains injured at different developmental stages become more or less susceptible to experimentally-induced status epilepticus....
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/s0920-1211(03)00029-9
更新日期：2003-03-01 00:00:00
abstract：:A partially purified extract from American ginseng has been shown to have anticonvulsant activity. To identify the active components in this extract, the activities of the individual ginsenosides (Rb(1), Rb(3) and Rd), mixtures of the purified ginsenosides and a newly prepared Rb fraction were determined. One hour aft...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2006.05.010
更新日期：2006-08-01 00:00:00
abstract：:Felbamate (FBM; 2-phenyl-1,3-propanediol dicarbamate) is an approved antiepileptic drug shown to be effective in a variety of seizure disorders refractory to other treatments. However, its use has been restricted because of association with occurrence of rare cases of aplastic anemia and hepatic failure. Since it was ...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/s0920-1211(01)00320-5
更新日期：2002-01-01 00:00:00
abstract：:Multiple subpial transection (MST) is an effective surgical therapy for patients with intractable seizures whose epileptogenic lesions lie in the cortex and are unresectable. Morrell developed this procedure and reported clinical results obtained using it. However, only the disappearance of epileptiform discharges aft...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(95)00003-s
更新日期：1995-05-01 00:00:00
abstract：:We studied the electrocorticogram (ECoG) before and immediately after transcortical selective amygdalo-hippocampectomy, prospectively in 13 consecutive patients and retrospectively in three others. ECoG was performed with surface and two depth electrodes inserted through T2 aimed at the amygdala and anterior hippocamp...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(93)90080-q
更新日期：1993-12-01 00:00:00
abstract：INTRODUCTION:The aim of this study was to determine the histological effects of valproic acid (VPA) on the penis in prepubertal rats. METHODS:Twelve male Wistar rats (21-24 days old) were divided equally into 2 experimental groups, and given tap water (control group) or 300mg/kg/day VPA via gavage for 30 days. After t...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2011.12.010
更新日期：2012-05-01 00:00:00
abstract：PURPOSE:We performed a retrospective study to investigate seizure, EEG, social and cognitive outcome in adult LGS subjects. METHODS:We retrospectively evaluated 27 LGS patients aged 40-59 years. We assessed in particular the evolution of different seizure types and EEG findings, as well as cognitive and social outcome...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2010.01.012
更新日期：2010-05-01 00:00:00
abstract：BACKGROUND:Due to pharmacoresistant seizures and the underutilization of surgical treatments, a large number of temporal lobe epilepsy (TLE) patients experience seizures for years or decades. The goal of this study was to generate a predictive model of duration of disease with the least number of parameters possible in...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2014.12.006
更新日期：2015-02-01 00:00:00
abstract：PURPOSE:The present study aims to determine the initialization and propagation of typical absence seizures using magnetoencephalography (MEG). METHOD:Fourteen drug-naïve children with childhood absence epilepsy (CAE) were studied using a 275-Channel MEG system. The spectral signatures of epileptic activity were assess...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2014.01.006
更新日期：2014-03-01 00:00:00
abstract：:The purpose of this investigation was to inquire into the multietiological determinants of psychopathology and social competence in children with epilepsy. The relationship between behavioral functioning as assessed by the Child Behavior Checklist and a variety of biological, psychosocial, medication and demographic r...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(88)90010-1
更新日期：1988-01-01 00:00:00
abstract：OBJECTIVES:to determine how the duration of SE, the EEG findings during/after SE, the depth of coma at presentation and age impact on the prognosis of convulsive status epilepticus indepedent of aetiology and to analyse the outcome of status epilepticus with respect to mortality and morbidity (the latter measured in te...
journal_title：Epilepsy research
pub_type： 杂志文章,评审
doi：10.1016/j.eplepsyres.2010.09.003
更新日期：2011-01-01 00:00:00
abstract：:To study the risk of developing unprovoked seizures among patients with multiple sclerosis (MS) and systemic lupus erythematosus (SLE), we used 1885 new onset seizure cases, 15,080 controls and defined exposure as a hospital discharge diagnosis of MS or SLE. The odds ratio with 95% confidence interval was 3.7 (CI 1.2-...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2012.04.005
更新日期：2012-09-01 00:00:00
