Dopamine D2 Receptor
Mostrando 13-24 de 194 artigos, teses e dissertações.
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13. Effect of Sapindus trifoliatus on hyperalgesic in vivo migraine models
Phytotherapies have offered alternative sources of therapy for migraine and gained much importance in prophylactic treatment. Sapindus trifoliatus is a medium-sized deciduous tree growing wild in south India that belongs to the family Sapindaceae. The pericarp is reported for various medicinal properties. A thick aqueous solution of the pericarp is used for
Brazilian Journal of Medical and Biological Research. Publicado em: 2005-03
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14. Ação de drogas agonistas e antagonistas dos sistemas colinérgico e dopaminégico: estudo comportamental e neuroquímico em corpo estriado de rato. / The action of the agonists and antagonists drugs of cholinergic and dopaminergic systems: behavioral and neurochemical study in striatum of rats
In the study, the interaction between the dopaminergic and cholinergic systems through the study of behavioral (open field and catalepsy) and neurochemical (density of dopaminergic receptor (D1 and D2-like) and muscarinic (M1+M2-like)) effect in striatum rat was evaluated. The following drugs were used: mazindol (indirect dopaminergic agonist), apomorphine (
Publicado em: 2005
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15. Effects of acute, long-term and abrupt withdrawal of long-term haloperidol treatment of the peritone macrophage activity in males and females rats / Efeitos do tratamento agudo e prolongado com haloperidol e da retirada abrupta deste tratamento, sobre a atividade de macrófagos peritoneais de ratos machos e fêmeas
Haloperidol is a receptor D2 antagonist frequently used in the treatment of schizophrenic patients. Haloperidol increased prolactin release from anterior pituitary gland, and prolactin modulates immune system activity. Groups of six male and female rats received acute 2mg/kg haloperidol treatment (E1), long-term (E2) haloperidol treatment (2mg/kg/day for 21
Publicado em: 2004
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16. Effect of intracerebroventricularly injected insulin on urinary sodium excretion by cerebroventricular streptozotocin-treated rats
Recent evidence suggests that insulin may influence many brain functions. It is known that intracerebroventricular (icv) injection of nondiabetogenic doses of streptozotocin (STZ) can damage insulin receptor signal transduction. In the present study, we examined the functional damage to the brain insulin receptors on central mechanisms regulating glomerular
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-09
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17. Effect of one-week ethanol treatment on monoamine levels and dopaminergic receptors in rat striatum
We studied the effects of ethanol on the levels of norepinephrine, dopamine, serotonin (5-HT) and their metabolites as well as on D1- and D2-like receptors in the rat striatum. Ethanol (2 or 4 g/kg, po) was administered daily by gavage to male Wistar rats and on the 7th day, 30 min or 48 h after drug administration, the striatum was dissected for biochemical
Brazilian Journal of Medical and Biological Research. Publicado em: 2003-04
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18. Stimulatory effects of adenosine on prolactin secretion in the pituitary gland of the rat
We investigated the effects of adenosine on prolactin (PRL) secretion from rat anterior pituitaries incubated in vitro. The administration of 5-N-methylcarboxamidoadenosine (MECA), an analog agonist that preferentially activates A2 receptors, induced a dose-dependent (1 nM to 1 µM) increase in the levels of PRL released, an effect abolished by 1,3-dipropyl-
Brazilian Journal of Medical and Biological Research. Publicado em: 2002-07
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19. Dopaminergic modulation of grooming behavior in virgin and pregnant rats
Dopamine receptors are involved in the expression of grooming behavior. The pregnancy-induced increase in self-licking observed in rats is important for mammary gland development and lactation. This study focuses on the role of dopamine receptor subtypes in grooming behavior of virgin and pregnant female rats. General and mammary gland grooming were measured
Brazilian Journal of Medical and Biological Research. Publicado em: 2001-11
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20. Increased baseline occupancy of D2 receptors by dopamine in schizophrenia
The classical dopamine hypothesis of schizophrenia postulates a hyperactivity of dopaminergic transmission at the D2 receptor. We measured in vivo occupancy of striatal D2 receptors by dopamine in 18 untreated patients with schizophrenia and 18 matched controls, by comparing D2 receptor availability before and during pharmacologically induced acute dopamine
The National Academy of Sciences.
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21. Distribution of D2 dopamine receptor mRNA in rat brain.
The distribution of mRNA coding for the D2 dopamine receptor was studied in the rat brain by in situ hybridization. A cDNA probe corresponding to the putative third cytosolic loop and sixth and seventh transmembrane domains of the rat D2 receptor was used to generate an 35S-labeled riboprobe to hybridize to D2 receptor mRNA. D2 mRNA was found both in dopamin
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22. Evidence for a substrate of neuronal plasticity based on pre- and postsynaptic neurotensin-dopamine receptor interactions in the neostriatum.
The major mechanism underlying the neuroleptic action of the tridecapeptide neurotensin (NT) appears to be an interaction with dopamine receptor mechanisms based on biochemical binding and behavioral experiments. In vivo microdialysis was used in conscious rats to investigate the effects of local perfusion with NT on the sensitivity of striatal dopamine D1 a
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23. Cellular responses to psychomotor stimulant and neuroleptic drugs are abnormal in mice lacking the D1 dopamine receptor
Stimulation of dopamine D1 receptors has profound effects on addictive behavior, movement control, and working memory. Many of these functions depend on dopaminergic systems in the striatum and D1–D2 dopamine receptor synergies have been implicated as well. We show here that deletion of the D1 dopamine receptor produces a neural phenotype in which amp
The National Academy of Sciences of the USA.
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24. A paradoxical regulation of the dopamine D3 receptor expression suggests the involvement of an anterograde factor from dopamine neurons.
The effects of interruption of dopaminergic transmission or sustained blockade of dopamine receptors by neuroleptics on the dopamine D3 receptor in the shell of the nucleus accumbens were investigated in rats. In this brain area the D3 receptor is abundant and may mediate antipsychotic drug effects. The D3 receptor density and mRNA abundance were evaluated w