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Pagina 1 a partire dal 48 risultati
Overexpression of spermidine/spermine N1-acetyltransferase elevates the threshold to pentylenetetrazol-induced seizure activity in transgenic mice.
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Activation of polyamine catabolism in transgenic mice through an overexpression of spermidine/spermine N(1)-acetyltransferase (SSAT) results in a massive overaccumulation of the diamine putrescine in most tissues including brain. Putrescine pool in transgenic animals was strikingly expanded in every
Potent and long-lasting anticonvulsant effects of 1-naphthylacetyl spermine, an analogue of Joro spider toxin, against amygdaloid kindled seizures in rats.
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The anticonvulsant effect of 1-naphthylacetyl spermine (1-NA-Spm), an analogue of Joro spider toxin, against amygdaloid kindled seizures was studied in rats. 1-NA-Spm (10, 20 and 40 micrograms/rat) dose-dependently improved kindled seizures and shortened the afterdischarge duration 30 min after the
Epileptic seizures and oxidative stress in a mouse model over-expressing spermine oxidase.
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Several studies have demonstrated high polyamine levels in brain diseases such as epilepsy. Epilepsy is the fourth most common neurological disorder and affects people of all ages. Excitotoxic stress has been associated with epilepsy and it is considered one of the main causes of neuronal
N-(3-aminopropyl)-cyclohexylamine blocks facilitation by spermidine of N-methyl-DL-aspartate-induced seizure in mice in vivo.
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The facilitating or antagonizing effects of polyamine analogues on N-methyl-DL-aspartate (NMDLA)-induced seizures were investigated using mice. Intracerebroventricular injection of spermidine and spermine, but not putrescine, shortened the latency to appearance of clonic convulsion induced by
N1-dansyl-spermine: a potent polyamine antagonist.
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The potential polyamine antagonist action of N1-dansyl-spermine (a potent NMDA antagonist) was assessed in two in vivo mouse models of polyamine action. Co-administration of N1-dansyl-spermine (2-10 microg, i.c.v.) with spermine (100 microg, i.c.v.) resulted in a dose-dependent antagonism of the
Increases in brain polyamine concentrations in chemical kindling and single convulsion induced by pentylenetetrazol in rats.
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Concentrations of the polyamines, putrescine, spermidine and spermine were investigated in rat brains, in which chemical kindling or single convulsion had been induced by intraperitoneal injection of pentylenetetrazol (PTZ). A single injection of 60 mg/kg of PTZ produced tonic-clonic convulsion and
Effect of one hyperbaric oxygen-induced convulsion on cortical polyamine content in two strains of mice.
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In rat striatum, after one hyperbaric oxygen (HBO)-induced convulsion, polyamine changes are found that could promote N-methyl-D-aspartate (NMDA) activation. In the HBO-sensitive CD1 mouse, unlike in the common C57 strain, there is some support for NMDA activation after the HBO seizure. We measured
[Spermine and spermidine polyamines in the brain and liver of rats under hyperoxic action].
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The effect of hyperbaric oxygenation (6 atmospheres) on the content of polyamines spermine and spermidine in the rat brain and liver was studied. A decrease of the spermidine content in the brain and liver during oxygen convulsions and four hours after decompression was revealed. The spermine
Hydroxycinnamic acid amide derivatives of polyamines reverse spermine-induced CNS excitation.
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The aim of this study was to examine the acute effect of a range of novel hydroxycinnamic acid derivatives of spermine on the development of spermine-induced CNS excitation and convulsions in female Laca mice, and to assess the chronic adverse behavioural effect profile of these compounds over a
Inhibition of DFMO-induced audiogenic seizures by chlordiazepoxide.
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Mice given 1% alpha-difluoromethylornithine (DFMO) in the drinking water for 5 weeks developed a hyperactive behavior characterized by uncontrolled running upon stimulation with noise. The running was followed by seizures and sometimes death. These behaviors are characteristic of audiogenic
Investigation of the involvement of the N-methyl-D-aspartate receptor macrocomplex in the development of spermine-induced CNS excitation in vivo.
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1. The involvement of the N-methyl-D-aspartate (NMDA) receptor macrocomplex in the development of spermine-induced CNS excitation in vivo was investigated. 2. Injection of 100 micrograms of spermine into the left lateral cerebral ventricle of female Laca mice (20-25 g) resulted in the development of
Homostachydrine is a Xenobiotic Substrate of OCTN1/SLC22A4 and Potentially Sensitizes Pentylenetetrazole-Induced Seizures in Mice
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Understanding of the underlying mechanism of epilepsy is desired since some patients fail to control their seizures. The carnitine/organic cation transporter OCTN1/SLC22A4 is expressed in brain neurons and transports food-derived antioxidant ergothioneine (ERGO), L-carnitine, and spermine, all of
Effect of L-type calcium channel antagonists on spermine-induced CNS excitation in vivo.
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The ability of nitrendipine, nisoldipine, verapamil and gabapentin to inhibit the development of CNS excitation induced by spermine was assessed in mice. Injection of an excitotoxic dose of spermine (100 microg, i.c.v.) in mice results in worsening tremor that culminates in the development of a
Whole-exome sequencing identifies a novel mutation in spermine synthase gene (SMS) associated with Snyder-Robinson Syndrome
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Background: Loss of function mutations in the spermine synthase gene (SMS) have been reported to cause a rare X-linked intellectual disability known as Snyder-Robinson Syndrome (SRS). Besides intellectual disability, SRS is also
Snyder-Robinson syndrome: a novel nonsense mutation in spermine synthase and expansion of the phenotype.
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Snyder-Robinson syndrome is a rare form of X-linked intellectual disability caused by mutations in the spermine synthase (SMS) gene, and characterized by intellectual disability, thin habitus with diminished muscle mass, osteoporosis, kyphoscoliosis, facial dysmorphism (asymmetry, full lower lip),
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