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piperidine/hypoxia
Ο σύνδεσμος αποθηκεύεται στο πρόχειρο
Σελίδα 1 από 23 Αποτελέσματα
Protective effects of some creatine derivatives in brain tissue anoxia.
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Σύνδεση εγγραφή
Some derivatives more lipophylic than creatine, thus theoretically being capable to better cross the blood-brain barrier, were studied for their protective effect in mouse hippocampal slices. We found that N-amidino-piperidine is harmful to brain tissue, and that phosphocreatine is ineffective.
Photosensitized damage to supercoiled plasmid DNA induced by 334-nm radiation in the presence of 2-thiouracil consists of alkali- and piperidine-labile sites as well as frank strand breaks.
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A covalently closed, supercoiled plasmid was irradiated with 334-nm ultraviolet radiation in the presence of the naturally occurring photosensitizer 2-thiouracil (s2Ura). After irradiation, some DNA samples were treated to reveal labile sites. Agarose gel electrophoresis was then used to resolve the
Characteristics of the NMDA receptor modulating hypoxia/hypoglycaemia-induced rat striatal dopamine release in vitro.
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We investigated the functional characteristics of the NMDA receptor that modulates hypoxia/hypoglycaemia-induced striatal dopamine release. Dopamine release was detected by fast cyclic voltammetry in rat neostriatal slices. Four variables were measured: T(on) -- time from initiation of
In vivo hypoxia-induced neuronal damage in dentate gyrus of rat hippocampus: changes in NMDA receptors and the effect of MK-801.
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Hypoxia is a major cause of ischaemia-induced neuronal damage. In the present study, we examined the effects of in vivo hypoxia on N-methyl-D-aspartate receptors (NMDAR) in the rat hippocampus. This model of in vivo hypoxia involved placing rats in a hypoxic chamber containing 5% O2 and 95% N2 for
PET imaging of tumor hypoxia using 18F-labeled pimonidazole.
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BACKGROUND
Tumor hypoxia contributes to loco-regional failure, and for optimal treatment planning, knowledge about tumor hypoxia in individual patients is required. Nitroimidazole-based tracers, which are retained in hypoxic cells, allow PET-based assessment of tumor hypoxia, but current tracers are
A novel piperidine identified by stem cell-based screening attenuates pulmonary arterial hypertension by regulating BMP2 and PTGS2 levels.
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Genetic defects in bone morphogenetic protein type II receptor (BMPRII) signalling and inflammation contribute to the pathogenesis of pulmonary arterial hypertension (PAH). The receptor is activated by bone morphogenetic protein (BMP) ligands, which also enhance BMPR2 transcription. A small-molecule
A specific inhibitor of calcium/calmodulin-dependent protein kinase-II provides neuroprotection against NMDA- and hypoxia/hypoglycemia-induced cell death.
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Calcium/calmodulin-dependent protein kinase-II (CamK-II) is a major neuronal protein which plays a significant role in the cellular process of long-term potentiation (LTP), and vesicular release of neurotransmitters. Here, we show that KN-62, 1-[N,O-bis(5-isoquinolinesulfonyl)-N-methyl-L-tyrosyl]-4-
Superoxide dismutase mimetic modulates hyperoxic augmentation of the diaphragmatic response to poikilocapnic hypoxia in non-vagotomized rats.
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A period of oxygen breathing enhances the subsequent respiratory responses to episodic hypoxia. Since hyperoxia increases a formation of reactive oxygen species (ROS) in lungs, in the present study we asked a question of whether superoxide anion produced during O(2) breathing would participate in
Adrenomedullin can protect against pulmonary vascular remodeling induced by hypoxia.
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BACKGROUND
Chronic hypoxia is one of the major causes of pulmonary vascular remodeling associated with stimulating reactive oxygen species (ROS) production. Recent studies have indicated that hypoxia upregulates expression of adrenomedullin (AM), which is not only a potent vasodilator but also an
Design and Synthesis of Vandetanib Derivatives Containing Nitroimidazole Groups as Tyrosine Kinase Inhibitors in Normoxia and Hypoxia.
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Sixteen novel epidermal growth factor receptor (EGFR)/vascular endothelial growth factor (VEGF)-2 inhibitors (nitroimidazole-substituted 4-anilinoquinazoline derivatives (16a-p)) were designed and prepared via the introduction of a nitroimidazole group in the piperidine side chain and modification
Sigma receptor ligand 4-phenyl-1-(4-phenylbutyl)-piperidine modulates neuronal nitric oxide synthase/postsynaptic density-95 coupling mechanisms and protects against neonatal ischemic degeneration of striatal neurons.
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In adult stroke models, 4-phenyl-1-(4-phenylbutyl) piperidine (PPBP), a sigma receptor agonist, attenuates activity of neuronal nitric oxide synthase (nNOS), blunts ischemia-induced nitric oxide production, and provides neuroprotection. Here, we tested the hypothesis that PPBP attenuates neuronal
Effects of hypoxia-ischemia and MK-801 treatment on the binding of a phencyclidine analogue in the developing rat brain.
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The phencyclidine analogue [3H](1-[2-thienyl]cyclohexyl)piperidine (3H-TCP) binds to the ion channel associated with the N-methyl-D-aspartate receptor channel complex. In vitro autoradiography indicates that the distribution of 3H-TCP binding in brain closely parallels that of [3H]glutamate binding
The use of cyclic nitroxide radicals as HNO scavengers.
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Reduction of cyclic stable nitroxides (RNO) by HNO to the respective hydroxylamines (RNO-H) has been demonstrated using EPR spectrometry. HNO shows low reactivity toward piperidine, pyrrolidine and nitronyl nitroxides with rate constants below 1.4 × 10(5)M(-1)s(-1) at pH 7.0, despite the high
Functional interactions between 5-hydroxytryptamine receptors and the serotonin transporter in pulmonary arteries.
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Pulmonary arterial 5-hydroxytryptamine (serotonin) (5-HT) transporter (SERT)-, 5-HT receptor expression, and 5-HT-induced vasoconstriction can be increased in pulmonary hypertension. These variables were studied in normoxic and hypoxic Fawn-Hooded (FH) and Sprague-Dawley (SD) rats. Furthermore, we
Inhibition of the ATP-sensitive potassium channel in the guinea pig substantia nigra by BMS 181100 is not mediated by a sigma-binding site.
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Quantitative autoradiography of brain tissue has revealed a high density of binding sites for the K-ATP channel antagonists, the sulphonylureas, and for sigma-ligands in the substantia nigra (SN). In view of the high density of the two binding sites in the SN the possibility has been investigated
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