The aim of the present study was to investigate a putative modulation of rat 5-HT system by the muscarinic receptor antagonist atropine using in-vivo electrophysiological and behavioural techniques. In the dorsal raphe nucleus, administration of atropine (1 mg/kg i.v.) prevented the suppressant effect of the selective serotonin reuptake inhibitor paroxetine (0.5 mg/kg i.v.) on the spontaneous f...

Brain-derived neurotrophic factor (BDNF) and its receptors tyrosine kinase B (trkB), and cyclic adenosine monophosphate response element binding protein (CREB) have been suggested as the neurobiological risk factors causing depressive disorder. Serotonin (5-hydroxytryptamine, 5-HT) plays an important role in the pathogenesis of depression. We in-vestigated the effect of treadmill exercise on so...

8-Hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT), a selective 5-hydroxytryptamine 1A (serotonin; 5-HT1A) agonist was used to evaluate the role of somatodendritic and/or postsynaptic 5-HT1A receptors following exposure to restraint stress. Exposure to an episode of 2-h restraint stress decreased 24 h cumulative food intake. Intensity of 8-OH-DPAT-induced 5-HT syndrome monitored next day was sm...

5-HT1A autoreceptor antagonists enhance the effects of antidepressants by preventing a negative feedback of serotonin (5-HT) at somatodendritic level. The maximal elevations of extracellular concentration of 5-HT (5-HT(ext)) induced by the 5-HT uptake inhibitor paroxetine in forebrain were potentiated by the 5-HT1A antagonist WAY-100635 (1 mg/kg s.c.) in a regionally dependent manner (striatum ...

G protein-activated inwardly rectifying potassium (GIRK) channels in 5-HT neurons are assumed to be principal effectors of 5-hydroxytryptamine 1A (5-HT1A) autoreceptors, but their pharmacology, subunit composition and the role in regulation of 5-HT neuron activity have not been fully elucidated. We sought for a pharmacological tool for assessing the functional role of GIRK channels in 5-HT neur...

The novel, potential anxiolytic, S 15535 (4-(benzodioxan-5-yl)1(indan-2-yl)piperazine), is an agonist and antagonist (weak partial agonist) at preand postsynaptic serotonin (5-HT)1A receptors, respectively. Herein, we characterized its influence on dialysate levels of 5-HT, dopamine (DA) and NAD simultaneously determined in single samples of the frontal cortex (FCX) of freely moving rats, and c...

The 5-HT1A/beta-adrenoceptor ligand (+/-)pindolol has been used in clinical trials to enhance the antidepressant effect of selective serotonin (5-HT) reuptake inhibitors (SSRIs). The accelerating effect of (+/-)pindolol is thought to derive from its blockade of the SSRI-induced, 5-HT1A autoreceptor-mediated inhibition of serotonergic cell firing and 5-HT release. However, controversial results ...

Basic and clinical studies suggest that neurokinin 1 (NK1) receptor antagonists have efficacy in the treatment of affective disorders through effects on the dorsal raphe nucleus (DR), a source of forebrain-projecting serotonin (5-HT) neurons that has also been implicated in affective disorders. To investigate the regulation of the DR-5-HT system by NK1 receptors, the effects of substance P (an ...

Kanabidiol, CB1 ve CB2 reseptörlerine düşük bağlanma eğilimine (afiniteye) sahip psikoaktif özellikleri olmayan bir kanabinoiddir. Ayrıca G proteinine bağlı reseptörler, serotonin reseptörleri opioid ile de aktivite göstermektedir. Bu nedenle kanabidiol uzun zamandır anksiyete, depresyon, refrakter epilepsi gibi nöronal hastalıkların, Parkinson, Alzheimer hastalığı, amyotrofik lateral skleroz s...