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Pagina 1 a partire dal 486 risultati
Influence of cannabinoids on electrically evoked dopamine release and cyclic AMP generation in the rat striatum.
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Using the endogenous cannabinoid receptor agonist anandamide, the synthetic agonist CP 55940 [[1alpha,2beta(R)5alpha]-(-)-5-(1,1-dimethylheptyl+ ++)-2-[5-hydroxy-2-(3-hydroxypropyl)cyclohexyl]phenol], and the specific antagonist SR 141716
Psychostimulant Effect of the Synthetic Cannabinoid JWH-018 and AKB48: Behavioral, Neurochemical, and Dopamine Transporter Scan Imaging Studies in Mice.
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JWH-018 and AKB48 are two synthetic cannabinoids (SCBs) belonging to different structural classes and illegally marketed as incense, herbal preparations, or chemical supply for theirs psychoactive cannabis-like effects. Clinical reports from emergency room reported psychomotor agitation as one of
L-DOPA disrupts adenosine A(2A)-cannabinoid CB(1)-dopamine D(2) receptor heteromer cross-talk in the striatum of hemiparkinsonian rats: biochemical and behavioral studies.
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Long-term therapy with L-3,4-dihydroxyphenylalanine (L-DOPA), still the most effective treatment in Parkinson's disease (PD), is associated with severe motor complications such as dyskinesia. Experimental and clinical data have indicated that adenosine A2A receptor antagonists can provide
Blockade of cannabinoid receptors by SR141716 selectively increases Fos expression in rat mesocorticolimbic areas via reduced dopamine D2 function.
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The present study investigated, in rats, whether blockade of cannabinoid CB1 receptors may alter Fos protein expression in a manner comparable to that observed with antipsychotic drugs. Intraperitoneal administration of the selective CB1 receptor antagonist, SR141716, dose-dependently (1.0, 3.0 and
Heteromer formation between cannabinoid type 1 and dopamine type 2 receptors is altered by combination cannabinoid and antipsychotic treatments
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The cannabinoid type 1 (CB1 ) receptor and the dopamine type 2 (D2 ) receptor are co-localized on medium spiny neuron terminals in the globus pallidus where they modulate neural circuits involved in voluntary movement. Physical interactions between the two receptors have been
Levonantradol, a potent cannabinoid-related analgesic, antagonizes haloperidol-induced activation of striatal dopamine synthesis.
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Levonantradol antagonized the compensatory acceleration of striatal dopamine synthesis induced by haloperidol. This effect was stereospecific, since the pharmacologically less active enantiomer, dextronantradol was approximately 30 times less effective. delta 9-Tetrahydrocannabinol at a dose 320
The cannabinoid receptor agonist WIN 55,212-2 reduces D2, but not D1, dopamine receptor-mediated alleviation of akinesia in the reserpine-treated rat model of Parkinson's disease.
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The effects of the synthetic cannabinoid receptor agonist WIN 55,212-2 on dopamine receptor-mediated alleviation of akinesia were evaluated in the reserpine-treated rat model of parkinsonism. The dopamine D2 receptor agonist quinpirole (0.1 mg/kg, ip) caused a significant alleviation of the
Δ 9-Tetrahydrocannabinol Toxicity and Validation of Cannabidiol on Brain Dopamine Levels: An Assessment on Cannabis Duplicity
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Δ9-tetrahydrocannabinol (THC) of cannabis is the main psychoactive component which is a global significant concern to human health. Evaluation on THC reported its drastic effect on the brain dopaminergic (DAergic) system stimulating mesolimbic DA containing neurons thereby increasing the level of
Cannabinoid-dopamine interaction in the pathophysiology and treatment of CNS disorders.
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Endocannabinoids and their receptors, mainly the CB(1) receptor type, function as a retrograde signaling system in many synapses within the CNS, particularly in GABAergic and glutamatergic synapses. They also play a modulatory function on dopamine (DA) transmission, although CB(1) receptors do not
Acute effects of the cannabinoid receptor agonist WIN55212-2 on dopamine release in rat: an in vivo electrochemical study.
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The aim of this study was to investigate the effects of the cannabinoid receptor agonist, WIN55212-2, and the cannabinoid receptor antagonist, SR141716A, on dopamine (DA) release evoked by KC1 (120 mM) microinjected into the striatum. The cannabinoid agonist WIN55212-2 (1 and 5 mg/kg, i.p.)
Pro-psychotic effects of synthetic cannabinoids: interactions with central dopamine, serotonin, and glutamate systems.
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An association between marijuana use and schizophrenia has been noted for decades, and the recent emergence of high-efficacy synthetic cannabinoids (SCBs) as drugs of abuse has lead to a growing number of clinical reports of persistent psychotic effects in users of these substances. The mechanisms
Cannabinoid dependence induces sustained changes in GABA release in the globus pallidus without affecting dopamine release in the dorsal striatum: A dual microdialysis probe study.
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A dual probe microdialysis study was designed to characterize GABA and dopamine (DA) release in the basal ganglia of cannabinoid-dependent Wistar rats. Whereas chronic administration of the cannabinoid receptor agonist WIN55,212 (WIN) resulted in increased basal GABA release, the D2 agonist
The cannabinoid agonists WIN 55,212-2 and CP 55,940 attenuate rotational behavior induced by a dopamine D1 but not a D2 agonist in rats with unilateral lesions of the nigrostriatal pathway.
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The effect of cannabinoid receptor stimulation on rotational behavior induced by a dopamine D1 and a D2 agonist was studied in rats with unilateral 6-hydroxydopamine-induced lesions of the dopaminergic nigrostriatal pathway. The cannabinoid agonists WIN 55,212-2 (2.5 mg/kg) and CP 55,940 (0.1 mg/kg)
Childhood obesity and the role of dopamine D2 receptor and cannabinoid receptor-1 gene polymorphisms.
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OBJECTIVE
The dopaminergic and endocannabinoid systems are involved in regulation of feeding behavior. The aim of the study is to examine the possible relation between polymorphisms of the dopamine D2 receptor (DRD2) and cannabinoid receptor-1 (CNR1) genes and childhood obesity.
METHODS
A hundred
The endogenous cannabinoid, anandamide, inhibits dopamine transporter function by a receptor-independent mechanism.
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The endocannabinoid, anandamide (AEA), modulates the activity of the dopamine transporter (DAT) in heterologous cells and synaptosomal preparations. The cellular mechanisms mediating this effect are unknown. The present studies employed live cell imaging techniques and the fluorescent, high affinity
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