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5 hydroxytryptamine/atrofia
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Página 1 a partir de 180 resultados
Functional regeneration of 5-hydroxytryptamine nerve terminals in the rat spinal cord following 5, 6-dihydroxytryptamine induced degeneration.
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Cytopathologic features indicative of 5-hydroxytryptamine axon degeneration are observed in rat brain after administration of d- and l-methylenedioxyamphetamine.
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Effects of intracerebral injections of 5,6-dihydroxytryptamine on central monoamine neurons: evidence for selective degeneration of central 5-hydroxytryptamine neurons.
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Time dependent effect of GM, ganglioside administration upon [(3)H]5-hydroxytryptamine uptake in partially denervated rat hippocampus.
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The effect of GM(1) administration upon the time course of the postlesion changes of [(3)H]5hydroxytryptamine uptake in the partially denervated rat hippocampus has been studied 6, 21, 42 and 90 days after surgery. At 6 and 21 days after operation the postlesion decrease of [(3)H]5-hydroxytryptamine
Inhibitory effect of lead on 5-hydroxytryptamine induced contractions of isolated ileum of rat.
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The present study examined the effects of lead (Pb) on the 5-hydroxytryptamine (5-HT) contracture and calcium (Ca++) kinetics of ileum of rat. Isolated ileum preparations incubated in excess Ca++ (2.8 mM) or in Ca++ free Tyrode solution showed decrease in sensitivity to 5-HT. The inhibitory action
Identification of multiple binding sites for [3H]5-hydroxytryptamine in the rat CNS.
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Recent studies indicate that there may be multiple subtypes of [3H]5-hydroxytryptamine ([3H]5-HT) binding sites. Mianserin and spiperone inhibited the specific binding of [3H]5-HT (2-3 nM) to rat brain cortical membranes with shallow displacement curves. The displacement data for spiperone were best
Characterization of green fluorescent protein-expressing retinal cone bipolar cells in a 5-hydroxytryptamine receptor 2a transgenic mouse line.
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Retinal bipolar cells relay visual information from photoreceptors to third-order retinal neurons. Bipolar cells, comprising multiple types, play an essential role in segregating visual information into multiple parallel pathways in the retina. The identification of molecular markers that can label
The pyramidal neurons in the medial prefrontal cortex show decreased response to 5-hydroxytryptamine-3 receptor stimulation in a rodent model of Parkinson's disease.
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In the present study, effect of SR 57227A, a selective 5-hydroxytryptamine-3 (5-HT(3)) receptor agonist, on the firing activity of pyramidal neurons in the medial prefrontal cortex (mPFC) was studied in normal rats and rats with 6-hydroxydopamine lesions of the substantia nigra pars compacta by
Chlormethiazole, dizocilpine and haloperidol prevent the degeneration of serotonergic nerve terminals induced by administration of MDMA ('Ecstasy') to rats.
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An investigation has been made into the effect of 3,4-methylenedioxymethamphetamine (MDMA or 'Ecstasy') administration on the concentration of 5-hydroxytryptamine (5-HT), uptake of [3H]5-HT and [3H]paroxetine binding in rat cerebral cortex tissue. Four days after 2 injections of MDMA (20 mg/kg i.p.,
Potentiation of parkinsonian symptoms by depletion of locus coeruleus noradrenaline in 6-hydroxydopamine-induced partial degeneration of substantia nigra in rats.
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Parkinson's disease is characterized not only by a progressive loss of dopaminergic neurons in the substantia nigra but also by a degeneration of locus coeruleus noradrenergic neurons. The present study addresses the question of whether a partial neurodegeneration of dopaminergic neurons using
Accumulation of 5-HT in non-terminal axons after p-chloro-N-methylamphetamine without degeneration of identified 5-HT nerve terminals.
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The effect of a single injection of d,1-p-chloro-N-methylamphetamine (PCMA) on 5-hydroxytryptamine (5-HT)- containing neurons in rat brain was investigated using fluorescence histochemical, electron microscopic and biochemical methods. PCMA caused in a dose-dependent manner (from 4.3 mg/kg), an
Assessment of 5-hydroxytryptamine efflux in rat brain during a mild, moderate and severe serotonin-toxicity syndrome.
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Serotonin (5-hydroxytryptamine; 5-HT)-toxicity syndrome, an iatrogenic brain disorder induced by excessive efflux of 5-HT, has received much attention because of increasing incidents of serotonergic antidepressants. However, the neural mechanism by which extracellular 5-HT is elevated to a toxic
The syndrome of gastric argyrophil carcinoid tumors and nonantral gastric atrophy.
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Records of the 30 cases of gastric carcinoid at the Mayo Clinic showed that the gastric mucosa was normal, hyperplastic, or atrophic (nonantral) in 12, 2, or 16 patients, respectively. In the atrophic group, the tumors were in the gastric body and fundus; small, polypoid, and multicentric; and
Plasma serotonin is a predictor for deterioration of urinary albumin excretion in men with type 2 diabetes mellitus.
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We performed an observational study to investigate if plasma 5-hydroxyindole-3-acetic acid (5-HIAA), a derivative end product of serotonin (5-hydroxytryptamine), concentration could be a predictor for deterioration of urinary albumin excretion. The relationship between baseline plasma 5-HIAA
Behavioral and biochemical effects of L-tryptophan and buspirone in a model of cerebellar atrophy.
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The Lurcher mutant mouse can be considered an adequate model of autosomal dominant spinocerebellar atrophy because of the severe degeneration of its cerebellar cortex and inferior olive. The purpose of this study was to determine whether the motor coordination deficits of Lurcher mutants could be
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