Exposure of hippocampal slices to magnesium-free medium produces epileptiform activity and simultaneously decreases calcium and calmodulin-dependent protein kinase II activity.

Abstract:

:The effect of magnesium-free medium on electrical and CaM kinase II activity in the rat hippocampal slice was examined. Experimental slices were incubated in 2 mM Mg, then exposed to magnesium-free medium for 1 h. Control slices were concurrently run in 2 mM Mg. Slices were then frozen and CaM kinase II activity was measured in homogenates. Exposure of hippocampal slices to magnesium-free medium resulted in spontaneous epileptiform activity and a concurrent 38 +/- 5.47% decrease in CaM kinase II activity (range 38.8-75.4% of control; n = 7, P less than 0.001, paired Student's t test). The decrease in CaM kinase II activity was not reversible by treatment with protein phosphatases 1 and 2A (58.8 +/- 4.77% of control activity; range 28.6-69.7, P less than 0.01, paired Student's t-test), indicating that the decrease in CaM kinase II activity cannot be accounted for exclusively by autophosphorylation. The results demonstrate that magnesium-free medium treatment can induce spontaneous epileptiform activity and simultaneous changes in CaM kinase II activity.

journal_name

Epilepsy Res

journal_title

Epilepsy research

authors

Churn SB,Anderson WW,DeLorenzo RJ

doi

10.1016/0920-1211(91)90054-j

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

211-7

issue

3

eissn

0920-1211

issn

1872-6844

pii

0920-1211(91)90054-J

journal_volume

9

pub_type

杂志文章
  • Correlation between cerebral perfusion and hyperventilation enhanced focal spiking activity.

    abstract::Single photon emission computed tomography (SPECT) has frequently been used to investigate cerebral brain perfusion (CBP) occurring ictally and inter-ictally in epileptic patients. Several studies have addressed the multimodal analysis of the modifications occurring in cerebral areas involved in seizure activity, by c...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/s0920-1211(00)00111-x

    authors: Marrosu F,Puligheddu M,Giagheddu M,Cossu G,Piga M

    更新日期:2000-06-01 00:00:00

  • No major role of common SV2A variation for predisposition or levetiracetam response in epilepsy.

    abstract::Levetiracetam (LEV), a newer antiepileptic drug (AED) useful for several epilepsy syndromes, binds to SV2A. Identifying genetic variants that influence response to LEV may allow more tailored use of LEV. Obvious candidate genes are SV2A, SV2B and SV2C, which encode the only known binding site, synaptic vesicle protein...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2008.09.003

    authors: Lynch JM,Tate SK,Kinirons P,Weale ME,Cavalleri GL,Depondt C,Murphy K,O'Rourke D,Doherty CP,Shianna KV,Wood NW,Sander JW,Delanty N,Goldstein DB,Sisodiya SM

    更新日期:2009-01-01 00:00:00

  • Optimization of pilocarpine-mediated seizure induction in immunodeficient NodScid mice.

    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

    authors: Leung A,Ahn S,Savvidis G,Kim Y,Iskandar D,Luna MJ,Kim KS,Cunningham M,Chung S

    更新日期:2015-01-01 00:00:00

  • An in vitro study of focal epileptogenesis in combined hippocampal-parahippocampal slices.

    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

    authors: Bear J,Lothman EW

    更新日期:1993-03-01 00:00:00

  • Cardiac changes in epileptic baboons with high-frequency microburst VNS therapy: A pilot study.

    abstract::The epileptic baboon provides a natural model of idiopathic generalized epilepsy and sudden unexpected death in epilepsy (SUDEP). We sought to evaluate autonomic differences, including heart rate (HR), heart rate variability (HRV) and corrected QT-duration (QTc) between two epileptic (EB1, EB2) and one control (CB) ba...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2019.106156

    authors: de la Garza MA,Poldiak D,Shade R,Salinas FS,Papanastassiou AM,Szabó CÁ

    更新日期:2019-09-01 00:00:00

  • A compound score for estimating the influence of inattention and somnolence during the intracarotid amobarbital test.

    abstract::Alterations in the level of consciousness may render the interpretation of the memory test results from the intracarotid amobarbital procedure difficult. The present study was designed to investigate the impact of inattention and somnolence on memory performance during the Amytal test. Nineteen consecutive patients un...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/0920-1211(92)90079-9

    authors: Malmgren K,Bilting M,Hagberg I,Hedström A,Silfvenius H,Starmark JE

    更新日期:1992-09-01 00:00:00

  • Meta-analysis of perinatal factors associated with epilepsy in tropical countries.

    abstract::Most people with epilepsy live in tropical countries. Perinatal factors seem to play a significant role in the occurrence of epilepsy. Available data provide different and sometimes contradictory conclusions on the role and the burden of these factors. The aim of our study was to evaluate the effect of these perinatal...

    journal_title:Epilepsy research

    pub_type: 杂志文章,meta分析,评审

    doi:10.1016/j.eplepsyres.2018.07.004

    authors: Dassi Tchoupa Revegue MH,Marin B,Ibinga E,Boumediene F,Preux PM,Ngoungou EB

    更新日期:2018-10-01 00:00:00

  • Use of cooking oils in a 2:1 ratio classical ketogenic diet for intractable pediatric epilepsy: Long-term effectiveness and tolerability.

    abstract:BACKGROUND:In many parts of eastern Asia, rice is a dietary staple and therefore the ketogenic diet (KD) can be difficult to administer. The aim of this study was to assess the long-term effectiveness and tolerability of the classical KD using a 2:1 ratio of fat to protein plus net carbohydrates, which is lower than th...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2018.09.002

    authors: Lee HF,Chi CS,Liao JH

    更新日期:2018-11-01 00:00:00

  • Nociceptive threshold in patients with epilepsy.

    abstract::Clinical practitioners have often observed in the course of their daily work that the pain thresholds of epileptic patients seem to differ from those of healthy subjects. These patients can suffer from quite severe traumatic lesions without apparently experiencing any pain. Since they are usually under treatment for e...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/0920-1211(92)90092-8

    authors: Guieu R,Mesdjian E,Roger J,Dano P,Pouget J,Serratrice G

    更新日期:1992-06-01 00:00:00

  • Preclinical characterization of MDL 27,192 as a potential broad spectrum anticonvulsant agent with neuroprotective properties.

    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

    authors: Kehne JH,Kane JM,Chaney SF,Hurst G,McCloskey TC,Petty MA,Senyah Y,Wolf HH,Zobrist R,White HS

    更新日期:1997-04-01 00:00:00

  • Electroclinical features of absence seizures in sleep.

    abstract:PURPOSE:To analyze electroclinical features of absence seizures during sleep. PRINCIPAL RESULTS:30 children with genetic generalized epilepsy had 52 paroxysms of GSW >2s during sleep. 18/52 (35%) demonstrated a clinical sign. Ictal GSW lasted an average of 6.5s. CONCLUSION:Motor manifestations are seen during GSW>2s ...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2010.12.009

    authors: Sadleir LG,Farrell K,Smith S,Connolly MB,Scheffer IE

    更新日期:2011-02-01 00:00:00

  • Levetiracetam effect on behavioral and electrophysiological parameters in rat model of global brain ischemia.

    abstract::Post-stroke paroxysmal activity is a neurophysiological indicator of epileptogenesis and increase of seizure susceptibility, so treatments with neuroprotective activity and anti-paroxysmal activity can be more beneficial during post-ischemic period. The goal of this study was evaluation of levetiracetam (100 mg/kg, 7 ...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2020.106466

    authors: Litvinova SA,Kutepova IS,Voronina TA,Petrunina АА

    更新日期:2020-11-01 00:00:00

  • Targeted gene panel and genotype-phenotype correlation in children with developmental and epileptic encephalopathy.

    abstract:OBJECTIVE:We performed targeted gene-panel sequencing for children with developmental and epileptic encephalopathy (DEE) and evaluated the clinical implications of genotype-phenotype correlations. METHODS:We assessed 278 children with DEE using a customized gene panel that included 172 genes, and extensively reviewed ...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2018.02.003

    authors: Ko A,Youn SE,Kim SH,Lee JS,Kim S,Choi JR,Kim HD,Lee ST,Kang HC

    更新日期:2018-03-01 00:00:00

  • Cannabis for refractory epilepsy in children: A review focusing on CDKL5 Deficiency Disorder.

    abstract::Severe paediatric epilepsies such as CDKL5 Deficiency Disorder (CDD) are extremely debilitating, largely due to the early-onset and refractory nature of the seizures. Existing treatment options are often ineffective and associated with a host of adverse effects, causing those that are affected to seek alternative trea...

    journal_title:Epilepsy research

    pub_type: 杂志文章,评审

    doi:10.1016/j.eplepsyres.2019.02.001

    authors: Dale T,Downs J,Olson H,Bergin AM,Smith S,Leonard H

    更新日期:2019-03-01 00:00:00

  • Association of the severity of cortical damage with the occurrence of spontaneous seizures and hyperexcitability in an animal model of posttraumatic epilepsy.

    abstract::Posttraumatic epilepsy is a common consequence of traumatic brain injury in humans. Major predictors for the development of posttraumatic epilepsy include the severity of injury and occurrence of cortical contusions. The effect of the size or location of the cortical lesion on the risk of epileptogenesis, however, is ...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2010.03.007

    authors: Kharatishvili I,Pitkänen A

    更新日期:2010-06-01 00:00:00

  • Seizure anticipation by patients with focal and generalized epilepsy: a multicentre assessment of premonitory symptoms.

    abstract:PURPOSE:To assess subjective seizure anticipation in patients with focal and generalized epilepsy. METHODS:Five hundred consecutively recruited out-patients (251 male, 249 female, mean age 38.1 year) from three German tertiary epilepsy referral centres filled out questionnaires regarding subjective anticipation of sei...

    journal_title:Epilepsy research

    pub_type: 杂志文章,多中心研究

    doi:10.1016/j.eplepsyres.2006.02.001

    authors: Schulze-Bonhage A,Kurth C,Carius A,Steinhoff BJ,Mayer T

    更新日期:2006-07-01 00:00:00

  • Bilateral preictal signature of phase-amplitude coupling in canine epilepsy.

    abstract::Seizure forecasting would improve the quality of life of patients with refractory epilepsy. Although early findings were optimistic, no single feature has been found capable of individually characterizing brain dynamics during transition to seizure. Cross-frequency phase amplitude coupling has been recently proposed a...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2017.11.009

    authors: Gagliano L,Bou Assi E,Nguyen DK,Rihana S,Sawan M

    更新日期:2018-01-01 00:00:00

  • Age-dependent modulation of hippocampal excitability by KCNQ-channels.

    abstract::Recently, mutations of KCNQ2 or KCNQ3, members of the KCNQ-related K(+)-channel (KCNQ-channel) family, were identified as cause of benign familial neonatal convulsions (BFNC). However, the exact pathogenic mechanisms of age-dependent development and spontaneous remission of BFNC remain to be elucidated. To clarify the...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/s0920-1211(02)00249-8

    authors: Okada M,Zhu G,Hirose S,Ito KI,Murakami T,Wakui M,Kaneko S

    更新日期:2003-02-01 00:00:00

  • The uncommon causes of status epilepticus: a systematic review.

    abstract::This paper reports the first systematic review of uncommon causes of status epilepticus reported in the literature between 1990 and 2008. Uncommon causes are defined as those not listed in the main epidemiological studies of status epilepticus. 181 causes were identified. These were easily categorised into 5 specific ...

    journal_title:Epilepsy research

    pub_type: 杂志文章,评审

    doi:10.1016/j.eplepsyres.2010.07.015

    authors: Tan RY,Neligan A,Shorvon SD

    更新日期:2010-10-01 00:00:00

  • Serotonin depletion effects on the pilocarpine model of epilepsy.

    abstract::The monoamine content in cerebral structures has been related to neuronal excitability and several approaches have been used to study this phenomenon during seizure vulnerability. In the present work, we have described the effects of serotonin (5-HT) depletion after the administration of 5,7-dihydroxytryptamine (5,7-D...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2008.08.010

    authors: Trindade-Filho EM,de Castro-Neto EF,de A Carvalho R,Lima E,Scorza FA,Amado D,Naffah-Mazzacoratti Mda G,Cavalheiro EA

    更新日期:2008-12-01 00:00:00

  • Age-dependent anticonvulsant action of antagonists of group I glutamate metabotropic receptors in rats.

    abstract:SUMMARY:Metabotropic glutamate receptors (mGluR) may represent a perspective target for anticonvulsant therapy but spectrum of their anticonvulsant effects is not sufficiently known. Our study was aimed at comparison of anticonvulsant actions of antagonists of mGluR1 and mGluR5 subtypes in immature rats. Seven-, 12-, 1...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2008.11.004

    authors: Mares P

    更新日期:2009-02-01 00:00:00

  • Resting motor threshold in idiopathic generalized epilepsies: a systematic review with meta-analysis.

    abstract::Resting motor threshold (rMT) assessed by means of Transcranial Magnetic Stimulation (TMS) is thought to reflect trans-synaptic excitability of cortico-spinal neurons. TMS studies reporting rMT in idiopathic generalized epilepsies (IGEs) yielded discrepant results, so that it is difficult to draw a definitive conclusi...

    journal_title:Epilepsy research

    pub_type: 杂志文章,meta分析,评审

    doi:10.1016/j.eplepsyres.2012.03.020

    authors: Brigo F,Storti M,Benedetti MD,Rossini F,Nardone R,Tezzon F,Fiaschi A,Bongiovanni LG,Manganotti P

    更新日期:2012-08-01 00:00:00

  • Juvenile myoclonic epilepsy: A system disorder of the brain.

    abstract::The prevailing understanding of generalized epilepsy is shaped by the traditional definition that "the responsible neuronal discharge takes place, if not throughout the entire grey matter, then at least in the greater part of it and simultaneously on both sides". This view is no longer tenable since concurrent finding...

    journal_title:Epilepsy research

    pub_type: 杂志文章,评审

    doi:10.1016/j.eplepsyres.2015.04.008

    authors: Wolf P,Yacubian EM,Avanzini G,Sander T,Schmitz B,Wandschneider B,Koepp M

    更新日期:2015-08-01 00:00:00

  • Antiepileptic drugs trials: neonates and infants.

    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

    authors: Pellock J

    更新日期:2006-01-01 00:00:00

  • Prognosis of patients with mesial temporal lobe epilepsy due to hippocampal sclerosis.

    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

    authors: Varoglu AO,Saygi S,Acemoglu H,Ciger A

    更新日期:2009-08-01 00:00:00

  • Whole-brain MEG connectivity-based analyses reveals critical hubs in childhood absence epilepsy.

    abstract::Absence seizures are thought to be linked to abnormal interplays between regions of a thalamocortical network. However, the complexity of this widespread network makes characterizing the functional interactions among various brain regions challenging. Using whole-brain functional connectivity and network analysis of m...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2018.06.001

    authors: Youssofzadeh V,Agler W,Tenney JR,Kadis DS

    更新日期:2018-09-01 00:00:00

  • Effect of valproic acid treatment on penile structure in prepubertal rats.

    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

    authors: Kutlu O,Cansu A,Karagüzel E,Gürgen SG,Koç O,Gür M,Ozgür GK

    更新日期:2012-05-01 00:00:00

  • Activation of group 2 metabotropic glutamate receptors reduces behavioral and electrographic correlates of pilocarpine induced status epilepticus.

    abstract::Novel treatments for epilepsy are necessary because many epilepsy patients are resistant to medication. Metabotropic glutamate receptors (mGluRs), specifically mGluR 2 and 3, may serve as antiepileptic drug targets because of their role in controlling synaptic release. In this study, we administered a Group 2 mGluR ag...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2013.10.009

    authors: Caulder EH,Riegle MA,Godwin DW

    更新日期:2014-02-01 00:00:00

  • Use of dietary and herbal supplements in adult patients with epilepsy.

    abstract:PURPOSE:To study the extent and characteristics of dietary and herbal supplements use in a large cohort of adult patients with epilepsy. METHODS:This prospective study included 490 patients receiving care at a university epilepsy clinic. A number of variables, including demographics, characteristics of epilepsy and it...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2019.106168

    authors: Bosak M,Mołek P,Słowik A

    更新日期:2019-10-01 00:00:00

  • Newly-diagnosed pediatric epilepsy is associated with elevated autoantibodies to glutamic acid decarboxylase but not cardiolipin.

    abstract::Glutamic acid decarboxylase autoantibodies (GADA) and anti-cardiolipin autoantibodies (ACA) have been detected in adult subjects with epilepsy, though the functional implications of these findings are a matter of debate. This study aimed to determine the prevalence of GADA and ACA and to investigate their clinical sig...

    journal_title:Epilepsy research

    pub_type: 杂志文章

    doi:10.1016/j.eplepsyres.2013.02.009

    authors: Veri K,Uibo O,Talvik T,Talvik I,Metsküla K,Napa A,Vaher U,Õiglane-Šlik E,Rein R,Kolk A,Traat A,Uibo R

    更新日期:2013-07-01 00:00:00