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Effects of AP-V and bicuculline on somatostatin-positive neurons in hypothalamus of rats subjected to acute hypobaric hypoxia.

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OBJECTIVE To investigate the effects of 2-amino-5-phosphonovalerate-pharmacology (AP-V) and bicuculline on somatostatin (SST)-positive neurons in hypothalamus of rats subjected to acute hypobaric hypoxia. METHODS SST-immunoreactivity (IR) and somatostatin mRNA (SS mRNA)-positive neurons were

Effect of postnatal anoxia on seizure susceptibility in rats: bicuculline-induced seizures and pretreatment with iproniazid.

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The effects of anoxia at 10 days of age on seizures induced by bicuculline (BIC), a specific antagonist of gamma-aminobutyric acid (GABA), and BIC-induced seizures after pretreatment with iproniazid (IPR), a monoamine oxidase inhibitor, were investigated in male adult rats. The rats with postnatal

[Effects of interleukin-10 on the epileptiform activity development in the hippocampus induced by brief hypoxia, bicuculline and electrical kindling].

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The comparative effects of antiinflammatory cytokine interleukin-10 on the epileptiform activity development in CA1 hippocampal neurons were studied in different functional models of epileptogenesis that are not accompanied the visible morphological disturbances in the brain cells: --in vitro

Effect of hypoxia on bicuculline seizures of rat: NMR spectroscopy and bioluminescence imaging.

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Previous studies suggested that hypoxia reduces the severity of brain injury after epileptic seizures. To test this hypothesis, the effect of hypoxic arrest of epileptic seizures on brain metabolism was investigated in rats by combining in vivo NMR spectroscopy with imaging techniques for the

Effect of hypoxia/ischemia on bicuculline-induced seizures in immature rats: behavioral and electrocortical phenomena.

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The relation between hypoxia/ischemia and subsequent alterations in seizure susceptibility in developing brain remains unclear. We assessed the behavioral and electrocorticographic (ECoG) effects of hypoxic/ischemic brain damage on bicuculline (BIC)-induced seizures in 7-day postnatal rats, and

The effects of interleukin-10 on the development of epileptiform activity in the hippocampus induced by transient hypoxia, bicuculline, and electrical kindling.

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The comparative effects of the anti-inflammatory cytokine interleukin-10 on the development of epileptiform activity were studied in hippocampal field CA1 neurons in different models of epileptogenesis not accompanied by visible morphological lesions in brain cells: 1) a model of hypoxic kindling in

Changes in brain adenosine during bicuculline-induced seizures in rats. Effects of hypoxia and altered systemic blood pressure.

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We analyzed brain tissue in 139 rats for adenosine and its metabolites, inosine and hypoxanthine, during the initial 120 seconds of seizures induced by bicuculline. We also measured ATP, ADP, AMP, phosphocreatine (PCr), and lactate. We divided the rats into four groups by adjustment of their

Influence of isoflurane concentration and hypoxia on functional magnetic resonance imaging for the detection of bicuculline-induced neuronal activation.

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Our present study shows that transient changes in relative cerebral blood volume (rCBV) induced by stimulation with bicuculline under six different conditions of anesthesia can be detected with high spatial resolution functional magnetic resonance imaging (fMRI). Bicuculline was administered at a

Adenosine in rat cerebral cortex during hypoxia and bicuculline-induced seizures.

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The epileptogenic effect of seizures induced by hypoxia: the role of NMDA and AMPA/KA antagonists.

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Hypoxia of the brain may alter further seizure susceptibility in a different way. In this study, we tried to answer the question how episode of convulsion induced by hypoxia (HS) changes further seizure susceptibility, and how N-methyl-D-aspartic acid (NMDA) and AMPA/KA receptor antagonists

Influence of systemic factors on experimental epileptic brain injury. Structural changes accompanying bicuculline-induced seizures in rats following manipulations of tissue oxygenation or alpha-tocopherol levels.

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A previous study from the laboratory showed that status epilepticus induced by bicuculline administration to ventilated rats produced astrocytic swelling and nerve cell changes ("type 1 and 2 injury") particularly in layers 3 and 5 of the neocortex (Söderfeldt et al. 1981). The type 1 injured

[Effect of opiate receptor agonists and antagonists on the resistance of animals to hypoxic hypoxia].

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The effects of morphine, a series of synthetic enkephalin analogs and antagonists of narcotic analgesics on the animals' survival rate under hypoxic hypoxia were studied in experiments on mice, rabbits, and cats. It was shown that the agonists of mu-opiate receptors, morphine, FK 33-824

Hypoxia-induced hypothermia mediated by GABA in the rostral parapyramidal area of the medulla oblongata.

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Hypoxia evokes a regulated decrease in the body core temperature (Tc) in a variety of animals. The neuronal mechanisms of this response include, at least in part, glutamatergic activation in the lateral preoptic area (LPO) of the hypothalamus. As the sympathetic premotor neurons in the medulla

Adenosine and cyclic AMP in cerebral cortex of rats in hypoxia, status epilepticus and hypercapnia.

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The influence of hypercapnia, hypoxia and status epilepticus on cerebral cortex concentrations of adenosine, adenine nucleotides and cyclic AMP was studied on lightly anaesthetized (70% N2O) and artificially ventilated rats. Neither hypercapnia (arterial PCO2 about 80 and about 300 mmHg) nor hypoxia

Comparison of changes evoked by GABA (gamma-aminobutyric acid) and anoxia in [K+]o, [Cl-]o, and [Na+]o in stratum pyramidale and stratum radiatum of the guinea pig hippocampus.

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Ion-selective microelectrode recordings were made to assess a possible contribution of extracellular gamma-aminobutyric acid (GABA) accumulation to early responses evoked in the brain by anoxia and ischemia. Changes evoked by GABA or N2 in [K+]o, [Cl-]o, [Na+]o, and [TMA+]o were recorded in the cell

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