picrotoxin/crise epiléptica

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Pro-convulsant effect of cefazolin sodium against pentylenetetrazol- or picrotoxin-induced convulsions in mice.

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Cefazolin injection (3000 mg/kg, i.v.) in mice showed several behavioral excitations such as wild running, jumping, rolling, and finally undergoing severe convulsions followed by death. It's lower doses (500-2000 mg/kg, i.v.) were unable to produce any convulsions or behavioral excitations in mice.

Diazepam, pentobarbital and D-etomidate produced increases in bicuculline seizure threshold; selective antagonism by RO15-1788, picrotoxin and (+/-)-DMBB.

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The seizure threshold for different seizure components was measured after slow intravenous infusion of bicuculline in the rat. Clear differences were seen in the seizure threshold for tremor (TRE) and clonic-forepaw (CLOF) as compared to clonic-hindpaw (CLOH) and tonic-forepaw (TONF). Seizure

Selective group II glutamate metabotropic receptor agonist LY354740 attenuates pentetrazole- and picrotoxin-induced seizures.

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There are several data indicating the involvement of metabotropic glutamate receptors (mGluR) in seizures and epileptogenesis. In the present experiments, the selective group II mGluR agonist (+)-2-aminobicyclo-[3.1.0]hexane-2,6-dicarboxylic acid (LY 354740) at doses from 4 to 16 mg/kg) administered

Role of cAMP-dependent protein kinase on acute picrotoxin-induced seizures.

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cAMP-dependent protein kinase (PKA) is a major modulator of synaptic transmission likely to be involved in molecular and cellular events leading to epileptogenesis, but little is known about how it affects the onset of acute epileptic seizures. In this study, we determined PKA enzymatic activity in

The effect of simvastatin on picrotoxin-induced seizure in mice.

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OBJECTIVE To study the effect of simvastatin on picrotoxin-induce seizures in mice in order to understand the impact of gabaergic system on neuronal cell death. METHODS The study was held between July and September 2011, at the Karadeniz Technical University in Trabzon, Turkey. Balb/c mice weighting

Developmental characteristics of picrotoxin-induced convulsions in rats with genetic absence epilepsy.

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Adult rats with genetic absence epilepsy (GAERS) were shown to be hyperresponsive to convulsions induced by picrotoxin compared to nonepileptic controls (NERs). In contrast, young GAERS aged 22-26 days were less responsive than NERs to picrotoxin-induced convulsions. Around 30 days of age, when

Picrotoxin-induced behavioral tolerance and altered susceptibility to seizures: effects of naloxone.

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The role of opiate mechanisms in the development of tolerance and altered susceptibility to seizures after repeated injections of picrotoxin was investigated. Independent groups of rats were pretreated with naloxone (0.3, 1.0, 3.0, and 10.0 mg/kg) or the saline vehicle and then tested for seizures

Bidirectional effects of benzodiazepine receptor ligands against picrotoxin- and pentylenetetrazol-induced seizures.

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The dose response curves of picrotoxin-induced seizures and pentylenetetrazol-induced seizures were shifted to the right by the benzodiazepine (BZ) receptor agonist lorazepam, and to the left by the inverse agonists, DMCM, ZK 90886, FG 7142 and CGS 8216. The BZ receptor antagonists ZK 93426 and Ro

[ATPase activity in neurons and neuroglia during convulsions induced by picrotoxin].

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Na+,K(+)-ATPase activity was studied in neurones and neuroglia under conditions of convulsions caused by picrotoxin administration. Picrotoxin is a stimulant which causes convulsions by suppression of presynaptic inhibition. Na+,K(+)-ATPase activity in neuroglia was increased in convulsion, bat was

Gender difference in susceptibility to picrotoxin-induced seizures is seizure- and stimulation-dependent.

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In a dose-response study, the pattern of sex-associated susceptibility to picrotoxin-induced myoclonic, focal, akinetic, and generalized tonic-clonic (GTC) seizures was investigated in rats to determine whether the reported heightened susceptibility of females to seizures was a general phenomenon in

Sex difference in susceptibility to picrotoxin-induced seizures in rats following octreotide.

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It was previously reported that females with proestrous are more susceptible to picrotoxin-induced epileptic seizures than males, provided that the estrous cycle is taken into consideration (Tan & Tan, 2001). The sex difference in susceptibility to picrotoxin-induced seizures was reconsidered in the

Ethosuximide suppresses seizures and lethality induced by picrotoxin in developing rats.

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The action of ethosuximide (125 or 250 mg/kg, IP) against picrotoxin-induced seizures (3-6 mg/kg, IP) was assessed in rats 12, 18, 25, and 90 days old. In 18-day-old and older controls, picrotoxin regularly elicited clonic seizures; tonic-clonic seizures were induced in all age categories with high

Delayed impairment of response extinction after single seizures induced by picrotoxin.

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Male Wistar rats were trained with a food rewarded task and treated with single convulsive dose of picrotoxin. Behavioural test for response extinction by non-reinforcement procedure, which was considered as inhibitory learning, was performed 1, 2, 5, or 7 days after the treatment. The results

Pentobarbitone induces Fos in astrocytes: increased expression following picrotoxin and seizures.

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Fos immunoreactivity was observed in astrocytes identified by immunoreactivity to glial fibrillary acidic protein, 1.5 h following intravenous pentobarbitone anesthesia (20-30 mg/kg). Fos-positive astrocytes were seen only in the hilus of the hippocampus. Pentobarbitone administered after picrotoxin

GSM radiation triggers seizures and increases cerebral c-Fos positivity in rats pretreated with subconvulsive doses of picrotoxin.

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This study investigated the effects of mobile-phone-type radiation on the cerebral activity of seizure-prone animals. When rats transformed into an experimental model of seizure-proneness by acute subconvulsive doses of picrotoxin were exposed to 2 h GSM-modulated 900 MHz radiation at an intensity

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