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 whether neurosteroids attenuate or exaggerate epileptiform activity in the immature brain, we investigated the effect of the neurosteroid allopregnanolone on epileptiform activity in an in-toto hippocampus preparation of early postnatal mice (postnatal days 4-7) using field potential recordings. These in-vitro experiments revealed that 0.5 μmol/L allopregnanolone had no effect on ictal-like epileptiform activity, but increased the occurrence of interictal epileptiform events. The allopregnanolone-induced enhancement of interictal epileptiform activity could be blocked by a selective inhibition of synaptic GABAA receptors. In contrast, allopregnanolone had no effect on interictal epileptiform activity upon enhanced extrasynaptic GABAergic activity. Patch-clamp experiments demonstrated that allopregnanolone prolonged the decay of GABAergic postsynaptic currents, but had no effect on tonic GABAergic currents. We conclude from these results that allopregnanolone can enhance excitability in the immature hippocampus viaprolonged synaptic GABAergic currents. This potential effect of neurosteroids on brain excitability should be considered if they are applied as anticonvulsants to premature or early postnatal babies.
journal_name
Epilepsy Resjournal_title
Epilepsy researchauthors
Sharopov S,Winkler P,Uehara R,Lombardi A,Halbhuber L,Okabe A,Luhmann HJ,Kilb Wdoi
10.1016/j.eplepsyres.2019.106196subject
Has Abstractpub_date
2019-11-01 00:00:00pages
106196eissn
0920-1211issn
1872-6844pii
S0920-1211(19)30291-8journal_volume
157pub_type
杂志文章abstract：OBJECTIVE:The purpose of this study was to investigate regional homogeneity (ReHo) in children with new-onset drug-naïve Benign Epilepsy with Centrotemporal Spikes (BECTS), chronic BECTS and healthy controls (HC) using the Regional Homogeneity (ReHo) method applied to resting state fMRI data. METHODS:Resting state fMR...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2015.06.017
更新日期：2015-10-01 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：PURPOSE:To characterize gabapentin pharmacokinetics in infants and children using a population approach and to identify important demographic and/or physiologic determinants of gabapentin disposition. METHODS:Gabapentin was administered in single doses of 10 mg/kg (N=48 healthy subjects, age 1 month-12 years) or in mu...
journal_title：Epilepsy research
pub_type： 临床试验,杂志文章
doi：10.1016/s0920-1211(01)00311-4
更新日期：2001-12-01 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：:Previous experiments suggest the primary route of valproic acid (VPA) removal from the rabbit central nervous system (CNS) is by probenecid-sensitive transporters at the blood-brain barrier but not at the choroid plexus. The purpose of this study was to determine if other transport mechanisms at the choroid plexus pla...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(94)00075-8
更新日期：1995-03-01 00:00:00
abstract：:Epilepsy is a common neurological disease and encompasses a variety of disorders with paroxysms. Although there is a genetic component in the pathogenesis of epilepsy, the molecular mechanisms of this syndrome remains poorly understood. Linkage analysis and positional cloning have not been sufficient tools for determi...
journal_title：Epilepsy research
pub_type： 杂志文章,评审
doi：10.1016/s0920-1211(00)00141-8
更新日期：2000-10-01 00:00:00
abstract：:Previous investigations in seizure-prone mice have suggested that an abnormally elevated production of the astrocyte-derived neuroexcitant, quinolinic acid (QUIN), plays a role in seizure susceptibility. In order to evaluate further the role of QUIN metabolism in genetic murine seizure models, the activities of its bi...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(94)90039-6
更新日期：1994-07-01 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：:A single-dose study of the beta-carboline, ZK 95962, on photosensitive generalized paroxysmal activity in the EEG was conducted in 6 patients with primary generalized epilepsy. Four of the patients were newly diagnosed and did not receive any antiepileptic drug or other medication during the study. Two were receiving ...
journal_title：Epilepsy research
pub_type： 临床试验,杂志文章,随机对照试验
doi：10.1016/0920-1211(90)90032-q
更新日期：1990-03-01 00:00:00
abstract：OBJECTIVE:To validate the Chinese version of the Generalized Anxiety Disorder-7 (GAD-7) in Chinese people with epilepsy (PWE). METHODS:A consecutive cohort of PWE from the West China Hospital was recruited. Each patient received a psychiatric evaluation comprising the Mini International Neuropsychiatric Interview (MIN...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2015.11.019
更新日期：2016-02-01 00:00:00
abstract：:Temporal lobe epilepsy (TLE) has been modeled in mice using pilocarpine induction, with variable results depending on specific strains. To allow efficient xenotransplantation for the purpose of optimizing potential cell-based therapy of human TLE, we have determined the optimal dosing strategy to produce spontaneous r...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2014.10.016
更新日期：2015-01-01 00:00:00
abstract：:Interpreting electrocorticography (ECoG) in the context of neuroimaging requires that multimodal information be integrated accurately. However, the implantation of ECoG electrodes can shift the brain impacting the spatial interpretation of electrode locations in the context of pre-implant imaging. We characterized the...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2020.106410
更新日期：2020-11-01 00:00:00
abstract：:Brain slices from adult rats that included ventral hippocampus and adjacent parahippocampal areas were studied at various sites for the appearance of epileptiform discharges as extracellular potassium ([K+]o) was systematically varied over the range of 3 mM to 10 mM. The development of evoked epileptiform discharges (...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(93)90043-7
更新日期：1993-03-01 00:00:00
abstract：OBJECTIVES:This study aimed to test the hypothesis that high-dose prednisolone (4 mg/kg/day) may be more efficacious than usual-dose (2 mg/kg/day) prednisolone for spasm resolution at 14-days in children with infantile spasms. METHODS:This was a randomized, open-label-trial conducted at a tertiary-level-hospital from ...
journal_title：Epilepsy research
pub_type： 杂志文章,随机对照试验
doi：10.1016/j.eplepsyres.2014.06.019
更新日期：2014-10-01 00:00:00
abstract：:The novel anticonvulsant, remacemide HCl [(+/-)-2-amino-N-(1-methyl-1,2-diphenylethyl)acetamide monohydrochloride; FPL12924AA], and a desglycinated metabolite [(+/-)-1-methyl-1,2-diphenylethylamine monohydrochloride; FPL 12495AA] reversibly limited sustained high-frequency repetitive firing (SRF) of sodium-dependent a...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(95)00053-4
更新日期：1996-02-01 00:00:00
abstract：:The development of epilepsy and a progressive increase in susceptibility to seizures may involve changes in inhibitory and excitatory systems from the beginning of the process. The present study was focused to analyze the opioid peptide changes induced by a chemical sub-convulsant stimulation. Experiments were carried...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/s0920-1211(99)00056-x
更新日期：1999-11-01 00:00:00
abstract：PURPOSE:Hippocampal sclerosis (HS) is the most common pathology in mesial temporal lobe epilepsy (MTLE). There are a few reports concerning prognosis in patients with MTLE-HS treated medically. The study was carried out to determine the clinical risk factors affecting prognosis. METHODS:We enrolled 287 patients with M...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.03.001
更新日期：2009-08-01 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：:To investigate involvement of extrafocal regions in mesial temporal lobe epilepsy (MTLE), we retrospectively explored abnormalities in distribution of iomazenil (IMZ) activity by identifying interhemispheric asymmetry on IMZ-SPECT images of patients with MTLE. Fourteen MTLE patients in whom a good surgical outcome was...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2012.07.001
更新日期：2013-02-01 00:00:00
abstract：OBJECTIVE:To assess the correlation between time of day and sleep-wake state prior to seizure onset for seizures recorded in an inpatient epilepsy monitoring unit. METHODS:We prospectively enrolled a consecutive series of patients undergoing inpatient epilepsy monitoring. For each epileptic seizure recorded, continuou...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2020.106524
更新日期：2021-01-01 00:00:00
abstract：PURPOSE:Recent analyses provided evidence that human adult cerebrospinal fluid (CSF) in addition to soluble proteins also contains membrane particles that moreover carry the somatic stem cell marker CD133. The significance of CD133 as a potential marker of cellular proliferation, including neurogenesis, remains unresol...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2011.10.029
更新日期：2012-03-01 00:00:00
abstract：:Nonconvulsive status epilepticus (NCSE) is difficult to diagnose but is an important cause of cognitive impairment. Electroencephalogram (EEG) monitoring is required for diagnosis and treatment. Little is known regarding the stability of subclinical epileptiform discharges (SEDs) preceding NCSE nor what strategies may...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/s0920-1211(02)00107-9
更新日期：2002-09-01 00:00:00
abstract：:The compound 5-(4-chlorophenyl)-2,4-dihydro-4-ethyl-3H-1,2,4-triazol-3-one (MDL 27,192) was evaluated in a variety of rodent models to assess its anticonvulsant profile and its potential neuroprotective activity. MDL 27,192 demonstrated anticonvulsant activity in a wide range of epilepsy models that are genetically-ba...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/s0920-1211(96)01020-0
更新日期：1997-04-01 00:00:00
abstract：:The mechanisms of paradoxical aggravation of epileptic seizures induced by selected antiepileptic drugs (AEDs) remain unclear. The present study addressed this issue by determining the seizure-threshold doses of carbamazepine (CBZ) and phenytoin (PHT), as well the dose-dependent effects of CBZ, PHT, and carbonic anhyd...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2009.01.015
更新日期：2009-04-01 00:00:00
abstract：:Much remains to be learned about mechanisms underlying entry into, and temporal progression of, status epilepticus (SE). This report describes a non-pharmacologic model of generalized convulsive SE in rat. Pulsed trains of suprathreshold electric current, were administered bilaterally to either of four rostral forebra...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(94)90084-1
更新日期：1994-09-01 00:00:00
abstract：:Huperzine A (HupA) is a naturally occurring compound found in the firmoss Huperzia serrata. While HupA is a potent acetylcholinesterase inhibitor, its full pharmacologic profile is incompletely described. Since previous works suggested a capacity for HupA to prophylax against seizures, we tested the HupA antiepileptic...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2015.08.012
更新日期：2015-11-01 00:00:00
abstract：BACKGROUND:EEG monitoring is important for the early detection of seizures during the course of critical illness. However, the logistics of real time EEG interpretation is challenging for the neurophysiology and critical care medicine teams. This study evaluated factors affecting the utility of digital trend analysis (...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/j.eplepsyres.2010.10.018
更新日期：2011-01-01 00:00:00
abstract：:The potential clinical efficacy of tiagabine for control of status epilepticus was evaluated in an experimental model. Tiagabine was administered to cobalt-lesioned rats in which status epilepticus was induced by injection of homocysteine thiolactone. Tiagabine was effective in controlling status epilepticus in this m...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(94)90067-1
更新日期：1994-12-01 00:00:00
abstract：:Special issues are related to AED testing in several populations. Pharmacokinetics, pharmacodynamics and underlying neurochemistry and developing systems require specific testing in appropriate infants with refractory seizures. EEG monitoring is an essential part of seizure definition and recognition, making it a nece...
journal_title：Epilepsy research
pub_type： 杂志文章,评审
doi：10.1016/j.eplepsyres.2005.09.017
更新日期：2006-01-01 00:00:00
abstract：:A battery of psychometric tests was administered to 110 patients with epilepsy and to 24 non-epileptic controls. Eighty-four patients had been established on treatment with a single anticonvulsant drug (35 carbamazepine (CBZ), 30 sodium valproate (VPA), 19 phenytoin (PHT)) at unaltered dosage for the previous 3 months...
journal_title：Epilepsy research
pub_type： 杂志文章
doi：10.1016/0920-1211(90)90018-q
更新日期：1990-12-01 00:00:00
