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Magnesium prevents seizure-induced reduction in excitatory amino acid receptor (kainate and alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid) binding in pregnant rat brain.

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OBJECTIVE Our purpose was to evaluate the effect of seizures on kainate and alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid receptor binding in maternal rat brain and whether maternal peripheral administration of magnesium sulfate can decrease this effect. METHODS Rats were implanted with a

Propionic acid induces convulsions and protein carbonylation in rats.

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Propionic acid (PA) accumulates in patients with propionic acidemia, an inherited metabolic disorder caused by the deficiency of propionyl-CoA carboxylase activity that is clinically characterized by neurological dysfunction, including seizures. However, it is not known whether PA causes seizures in

A crucial role of the alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid subtype of glutamate receptors in piriform and perirhinal cortex for the initiation and propagation of limbic motor seizures.

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The role of alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptors in the initiation and propagation of limbic motor seizures in rats was examined by the intracerebral and systemic administration of 2,3-dihydroxy-6-nitro-7-sulfamoyl-benzo (f) quinoxaline (NBQX), a selective

Intracerebroventricular injection of propionic acid, an enteric metabolite implicated in autism, induces social abnormalities that do not differ between seizure-prone (FAST) and seizure-resistant (SLOW) rats.

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Autism is a complex neurodevelopmental disorder that is characterized by social abnormalities. Genetic, dietary and gut-related factors are implicated in autism, however the causal properties of these factors and how they may interact are unclear. Propionic acid (PPA) is a product of gut microbiota

Altered excitability and distribution of NMDA receptor subunit proteins in cortical layers of rat pups following multiple perinatal seizures.

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During a critical period of postnatal development the epileptogenic focus is thought to be of cortical origin. We used immunohistochemistry and Western blotting to elucidate potential mechanisms underlying an increased state of susceptibility to seizures in immature animals. Distribution patterns of

[Effect of excitant amino acid antagonists on glutamate receptors in the locust and on convulsions induced by glutamate, aspartate, kynurenine and quinolinic acid in mice].

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All excitatory amino acid antagonists studied: diethyl esters of aspartic (DEEA) and glutamic (DEEG) acids, 2-amino-3-phosphono-propionic acid (APPA) and 2-amino-4-phosphono-butanoic acid (APBA), diminished the amplitude of excitatory postsynaptic potentials (EPP) of the locust (Locusta migratoria

Autoantibodies to neuronal antigens in children with new-onset seizures classified according to the revised ILAE organization of seizures and epilepsies.

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OBJECTIVE Potentially pathogenic autoantibodies are found increasingly in adults with seizure disorders, including focal seizures and those of unknown cause. In this study, we investigated a cohort of children with new-onset seizures to see whether there were autoantibodies and the relationship to

NG-nitro-L-arginine differentially affects glutamate- or kainate-induced seizures.

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The effects of nitric oxide (NO) synthase inhibitor, NG-nitro-L-arginine (NNA) on seizures induced by excitatory amino acids, bicuculline, pentylenetetrazol and pilocarpine were studied in mice. NNA (10 and 40 mg kg-1, i.p.) enhanced the susceptibility to intracerebroventricular (i.c.v.) kainate

Topiramate antagonizes NMDA- and AMPA-induced seizure-like activity in planarians.

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The mechanism of anticonvulsant action of topiramate includes inhibition of glutamate-activated ion channels. The evidence is most convincing for direct inhibitory action at the ionotropic AMPA (alpha-Amino-3-hydroxy-5-methylisoxazole-4-propionic acid) and kainate

Synthesis, physicochemical and anticonvulsant properties of new N-4-arylpiperazin-1-yl amides of (2-aza-1,3-dioxospiro[4.4]non-2-yl)- and [4.5]dec-2-yl)-propionic acid.

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In continuation of the search of new anticonvulsants, a series of N-4-arylpiperazin-1-yl 2-aza-1,3-dioxospiro[4.4]non-2-yl- (5-8) and [4.5]dec-2-yl- (9-15) propionamides, structurally related to the previously described N-4-arylpiperazin-1-yl amides of 2-aza-1,3-dioxospiro[4.5]dec-2-yl-acetic acid,

Quisqualic acid-induced seizures during development: a behavioral and EEG study.

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Quisqualic acid (QA) is an excitatory amino acid analogue that binds to the glutamate ionotropic receptor subclass AMPA (alpha-amino-3 hydroxy-5 methyl-4 isoxazol propionic acid) and metabotropic receptor phospholipase C. To study its epileptogenic properties, we administered QA through an

Suppression of neuronal network excitability and seizure-like events by 2-methyl-4-oxo-3H-quinazoline-3-acetyl piperidine in juvenile rat hippocampus: involvement of a metabotropic glutamate receptor.

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We present data on the antiepileptic potency of 2-methyl-4-oxo-3H-quinazoline-3-acetyl piperidine (Q5) in juvenile (P9-13) rat hippocampal slices and in particular Q5's action mechanism and target. Q5 (200-500 microM), but not alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA)/Kainate

Efficacy of huperzine in preventing soman-induced seizures, neuropathological changes and lethality.

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Huperzine A (HUP) is a potent reversible inhibitor of acetylcholinesterase (AChE) that crosses the blood-brain barrier. Its ability to prevent seizures and subsequent hippocampal neuropathological changes induced by the organophosphate soman was studied in guinea pigs. Results were compared to

Glutamatergic antagonism: effects on lidocaine-induced seizures in the rat.

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We tested the hypothesis that glutamate receptor antagonists increase the dose of lidocaine required to induce seizure activity. Sprague-Dawley rats were anesthetized with halothane in 40% O2/balance N2 and mechanically ventilated. After surgical preparation, halothane was discontinued. Normocapnia,

The insular but not the perirhinal cortex is involved in the expression of fully-kindled amygdaloid seizures in rats.

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We have previously reported an important excitatory role of the perirhinal cortex (PRC) in rat kindling development using an immunohistochemistry technique. In this study, we investigated the roles of the PRC and the insular cortex (INS) located rostral to the PRC, in fully-kindled amygdaloid

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