cyclooxygenase/seizures

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Evidence for increased activity of mouse brain fatty acid cyclooxygenase following drug-induced convulsions.

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Enzymatic production of prostaglandins (PGs) from exogenous arachidonic acid was studied in brain microsomal fractions prepared from mice following pentylenetetrazol (PTZ)-induced convulsions. Prostaglandin E2 (PGE2) and prostaglandin F2 alpha (PGF2 alpha) measured either by radioimmunoassay or

Cyclooxygenase-2/PGE2 pathway facilitates pentylenetetrazol-induced seizures.

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Cyclooxygenases (COXs) are rate-limiting enzymes in the metabolic pathways in which arachidonic acid is converted to prostaglandins. COX-2 is the isoform induced at injury/inflammation sites and expressed constitutively in a few tissues, such as the central nervous system, and plays a role in

Cyclooxygenase-2 selective inhibitors aggravate kainic acid induced seizure and neuronal cell death in the hippocampus.

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Cyclooxygenase-2 (COX-2) in the brain is expressed constitutively and also increased in pathological conditions such as seizure, cerebral ischemia, and inflammation. This study examined the role of COX-2 in kainic acid-induced seizure and in the following neuronal death by using selective

Enhanced cyclooxygenase-2 expression in olfactory-limbic forebrain following kainate-induced seizures.

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Cyclooxygenase-2 is expressed at low levels in a subset of neurons in CNS and is rapidly induced by a multiplicity of factors including seizure activity. A putative relationship exists between cyclooxygenase-2 induction and glutamatergic neurotransmission. Cyclooxygenase-1 is constitutively

Neuromodulatory role of endogenous interleukin-1β in acute seizures: possible contribution of cyclooxygenase-2.

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The function of endogenous interleukin-1β (IL-1β) signaling in acute seizure activity was examined using transgenic mice harboring targeted deletions in the genes for either IL-1β (Il1b) or its signaling receptor (Il1r1). Acute epileptic seizure activity was modeled using two mechanistically

Assessment of the effects of the cyclooxygenase-2 inhibitor rofecoxib on visuospatial learning and hippocampal cell death following kainate-induced seizures in the rat.

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Kainate-induced seizures result in hippocampal neurodegeneration and spatial learning deficits in rodents. Previous studies show that rofecoxib, a selective cyclooxygenase-2 inhibitor, protects against kainate-induced hippocampal cell death 3 days after seizures. Our aim was to determine whether

Inferior collicular seizure generalization produces site-selective cortical induction of cyclooxygenase 2 (COX-2).

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Given the potential role of mitogen-inducible cyclooxygenase (COX-2) in CNS damage, patterns of COX-2 induction were determined both before and after seizure generalization from the inferior collicular cortex into the forebrain. With midbrain seizures, no change was found in COX-2-like

Maintenance of the Innate Seizure Threshold by Cyclooxygenase-2 is Not Influenced by the Translational Silencer, T-cell Intracellular Antigen-1.

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Activity of neuronal cyclooxygenase-2 (COX-2), a primary source of PG synthesis in the normal brain, is enhanced by excitatory neurotransmission and this is thought to be involved in seizure suppression. Results herein showing that the incidence of pentylenetetrazole (PTZ)-induced convulsions is

Behavioral changes and expression of heat shock protein hsp-70 mRNA, brain-derived neurotrophic factor mRNA, and cyclooxygenase-2 mRNA in rat brain following seizures induced by systemic administration of kainic acid.

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Kainic acid-induced seizures in rats represent an established animal model for human temporal lobe epilepsy. However, it is well-known that behavioral responses to the systemic administration of kainic acid are inconsistent between animals. In this study, we examined the relationship between

Cyclooxygenase-2 expression and effect of celecoxib in flurothyl-induced neonatal seizure.

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Endogenous PGE(2) dynamically regulates membrane excitability, synaptic transmission and plasticity. Neonatal seizures are associated with a number of activity-dependent changes in brain development including altered synaptogenesis and synaptic plasticity as well as reduction in neurogenesis. Thus,

Cyclooxygenase-2 expression in the hippocampus of genetically epilepsy susceptible El mice was increased after seizure.

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It has been suggested that cyclooxygenase (COX)-2 and prostaglandin play a role in epilepsy. We studied the expression of COX-2 in the hippocampus and the effect of oral administration of indomethacin, a COX inhibitor, on seizure activity in genetically seizure-susceptible El mice. COX-2 protein

Cyclooxygenase-1 as a Potential Therapeutic Target for Seizure Suppression: Evidences from Zebrafish Pentylenetetrazole-Seizure Model.

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Cyclooxygenases (COX)-1 and -2 are isoenzymes that catalyze the conversion of arachidonic acid into prostaglandins (PGs). COX-2 and PGs are rapidly increased following seizures and are known to play important roles in the neuroinflammatory process. COX-2 isoform has been predominantly explored as

Cyclooxygenase-2 expression is induced in rat brain after kainate-induced seizures and promotes neuronal death in CA3 hippocampus.

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Cyclooxygenase-2 (COX-2) is the predominant isoform of cyclooxygenase in brain. COX-2 activity produces oxidative stress and results in the production of prostaglandins that have many injurious effects. COX-2 transcription is induced by synaptic activity; therefore, COX-2 activity could contribute

Rofecoxib, a selective cyclooxygenase-2 (COX-2) inhibitor increases pentylenetetrazol seizure threshold in mice: possible involvement of adenosinergic mechanism.

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Multiple lines of investigations have explored the role of cyclooxygenases (COX) in epilepsy and related neuropsychiatric disorders. Cyclooxygenase particularly, COX-2 expression was found to increase in brain during seizure paradigms. The present study was carried out to investigate the effect of

Seizure-induced up-regulation of P-glycoprotein at the blood-brain barrier through glutamate and cyclooxygenase-2 signaling.

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Increased expression of drug efflux transporters at the blood-brain barrier accompanies epileptic seizures and complicates therapy with antiepileptic drugs. This study is concerned with identifying mechanistic links that connect seizure activity to increased P-glycoprotein expression at the

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