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calmodulin/seizures
Nuoroda įrašoma į mainų sritį
Puslapis 1 nuo 163 rezultatus
Loss of type II calcium/calmodulin-dependent kinase activity correlates with stages of development of electrographic seizures in status epilepticus in rat.
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Understanding the molecular basis of altered neuronal excitability in epilepsy is a major challenge in neuroscience research. The present study suggests an inverse correlation between changes in neuronal excitability in status epilepticus and the activity of type II multifunctional
Decreased expression of the alpha subunit of Ca2+/ calmodulin-dependent protein kinase type II mRNA in the adult rat CNS following recurrent limbic seizures.
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Calcium/calmodulin-dependent protein kinase type II (CamKII) is a ubiquitous brain enzyme implicated in a wide variety of neuronal processes. Understanding CamKII has become increasingly complicated with the recent identification of multiple gene transcripts coding for separate subunits. Previous
A mechanism for the inactivation of Ca2+/calmodulin-dependent protein kinase II during prolonged seizure activity and its consequence after the recovery from seizure activity in rats in vivo.
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Seizure is a form of excessive neuronal excitation and seizure-induced neuronal damage has profound effects on the prognosis of epilepsy. In various seizure models, the inactivation of Ca2+/calmodulin-dependent protein kinase II (CaMKII) occurs during seizure activity preceding neuronal cell death.
Attenuation of the seizure-induced expression of BDNF mRNA in adult rat brain by an inhibitor of calcium/calmodulin-dependent protein kinases.
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We have examined the potential involvement of calcium/calmodulin-dependent protein kinases in the regulation of brain-derived neurotrophic factor mRNA in vivo following kainic acid (kainate)-induced seizure activity by in situ hybridization. KN-62, a specific inhibitor of
Brief seizure activity alters Ca2+/calmodulin dependent protein kinase II dephosphorylation and subcellular distribution in rat brain for several hours.
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The effect of a brief pentylenetetrazol (PTZ) convulsive seizure on rat cerebral cortical Ca2+/calmodulin dependent protein kinase II (CaMKII) was investigated. By immunoblot, it was found that a single PTZ seizure, lasting less than a minute, caused translocation of CaMKII alpha-subunit
Protective effect of calmodulin inhibitors against acute cyanide-induced lethality and convulsions in mice.
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The ED50 value of cyanide as measured by induction of convulsions (tonic seizure) was significantly increased by 80% or 69% when trifluoperazine (TFP) or chlorpromazine (CHP), a specific calmodulin inhibitor was preinjected intracerebroventricularly (i.v.t.) at a dose of 0.09 mumol/body of mice.
[Single audiogenic seizure promotes the increased levels of calcineurin and Ca(2+)-calmodulin-dependent protein kinase II in the rat brain].
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Ca(2+)-calmodulin-dependent protein kinase II (CaMKII) and protein phosphatase 2B (calcineurin) play a critical role in modulation responses of nerve cells to Ca(2+)-signal. Here we asked the question, whether and how these enzymes may become affected by single seizure activity. Male epilepsy-prone
Long-lasting decrease in neuronal Ca2+/calmodulin-dependent protein kinase II activity in a hippocampal neuronal culture model of spontaneous recurrent seizures.
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Ca2+/calmodulin-dependent protein kinase II (CaM Kinase II) activity was evaluated in a well-characterized in vitro model of epileptiform activity. Long-lasting spontaneous recurrent seizure (SRS) activity was induced in hippocampal neuronal cultures by exposure to low Mg2+ media for 3 h. Analysis
Seizure-mediated accumulation of the beta subunit of Ca2+/calmodulin-dependent protein kinase II in nuclei of mouse brain cells.
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We identified a 45-kDa protein by 2D electrophoresis that was enhanced following pentylenetetrazol (PTZ)-mediated seizures. Mass-spectrography of this protein revealed the beta subunit of Ca2+/calmodulin-dependent protein kinase II (CaMKIIbeta), although no evidence for increase in bulk CaMKIIbeta
Increased levels of mRNA for beta- but not alpha-subunit of calmodulin kinase II following kindled seizures.
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We studied levels of mRNA for the alpha- and beta-subunits of calmodulin (CaM) kinase II using the amygdaloid kindling model of epilepsy. There were significant increases in mRNA for the beta-subunit of CaM kinase II in the hippocampus 4-24 h after stage 5-kindled seizures. Moreover, this mRNA was
Anticonvulsant activity of calmodulin antagonist W-7 in convulsions induced by lindane and BayK-8644: effects in c-fos expression.
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The anticonvulsant activity of calmodulin antagonist W-7, was investigated on convulsions induced in mice by the insecticide lindane and by the calcium channel agonist BayK-8644. We also studied the inhibitory effect of W-7 on on c-fos mRNA expression induced by both convulsants. We observed a good
Anticonvulsant activity of delta-HCH, calcium channel blockers and calmodulin antagonists in seizures induced by lindane and other convulsant drugs.
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The anticonvulsant activity of delta-HCH and of a calmodulin antagonist, W-7 were investigated on convulsions induced in mice by lindane (ED100 100 mg/kg), by GABAergic antagonists PTZ (ED100 60 mg/kg) and PTX(ED100 4 mg/kg), by calcium channel agonist BAY-K-8644 (ED100 5 mg/kg), by two agonists of
Involvement of cAMP- and Ca(2+)/calmodulin-dependent neuronal protein phosphorylation in mechanisms underlying genetic predisposition to audiogenic seizures in rats.
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It was shown that increased excitability in neurons underlying epilepsies would be maintained by abnormalities in protein phosphorylation systems. This study was initiated to compare the functioning of Ca(2+)/calmodulin- and cAMP-dependent systems of protein phosphorylation in homogenates of
Prolonged changes in Ca2+/calmodulin-dependent protein kinase II after a brief pentylenetetrazol seizure; potential role in kindling.
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This study evaluated the alteration of CaMKII autophosphorylation and distribution in rat brain following a single, brief pentylenetetrazol (PTZ) seizure and during PTZ kindling. Total CaMKII alpha subunit (alpha-CaMKII) and alpha-CaMKII phosphorylated at Thr(286) were detected by immunoblot. A
[Effect of seizure activity on subunit composition of Ca2+/calmodulin-dependent protein kinase II in hippocampus of Krushinskii-Molodkina rats].
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Using a Western blot method it was been shown that a aontent of beta-CaMKII subunit was decreased on 40 % in hippocampus of Krushinskii-Molodkina rats (rats, genetically prone to audiogenic seizures) in comparison with normal Wistar rats. Additionally, we have investigate the temporal modifications
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