Gé S. F. Ruigt

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In vitro, (S)-2-(chloro-5-fluoro-indol-1-yl)-1-methylethylamine 1:1 C4H4O4 and (S)-2-(4,4,7-trimethyl-1,4-dihydro-indeno[1, 2-b]pyrrol-1-yl)-1-methylethylamine 1:1 C4H4O4 exhibited high-affinity binding to the serotonin2C (5HT2C) receptors and stimulated turnover of inositol 1,4,5-triphosphate. Affinity to several of the other 5-HT receptor subtypes and to(More)
Action monitoring has been studied extensively by means of measuring the error-related negativity (ERN). The ERN is an event-related potential (ERP) elicited immediately after an erroneous response and is thought to originate in the anterior cingulate cortex (ACC). Although the ACC has a central role in the brain, only a few studies have been performed to(More)
The central cholinergic system is implicated in cognitive functioning. The dysfunction of this system is expressed in many diseases like Alzheimer's disease, dementia of Lewy body, Parkinson's disease and vascular dementia. In recent animal studies, it was found that selective cholinergic modulation affects visuospatial processes even more than memory(More)
Chronic exposure to mild unpredictable stress causes subsensitivity to rewards (anhedonia). These effects are reversible by chronic treatment with antidepressant drugs, and have been proposed as an animal model of depression. In the present study, sleep architecture, particularly the rapid eye movement (REM) component, was mapped in rats following exposure(More)
Ampakines act as positive allosteric modulators of AMPA-type glutamate receptors and facilitate hippocampal long-term potentiation (LTP), a mechanism associated with memory storage and consolidation. The present study investigated the acute effects of farampator, 1-(benzofurazan-5-ylcarbonyl) piperidine, on memory and information processes in healthy(More)
Cytostatic drugs, like cisplatin, vincristine and taxol, when given to cancer patients may cause peripheral neuropathies. We were interested in the potential neuroprotective effects of neurotrophic factors against such neuropathies. To this aim we studied the effects of these cytostatic agents on sensory fibers located in the dorsal root ganglia (DRG) in(More)
The effects of long-term treatment with the antidepressant drugs, desipramine (DMI) and mianserin (MIA) on neurotransmission in the hippocampal slice were studied by examining the actions of serotonin (5-HT), isoprenaline and (+/-)-baclofen on the population spike in the pyramidal cell layer, recorded in area CA1. The decrease in amplitude of the population(More)
Drug-induced improvement of depression may be mediated by changes in sleep physiology. In earlier studies on sleep EEG changes during treatment with antidepressants in depressed patients it could not be excluded that sleep disruptions and changes in the amount and distribution of REM sleep play a role in the changes in the sleep EEG. Therefore knowledge of(More)
A complex dynamic ultradian rhythm underlies the hypothalamic-pituitary-adrenal (HPA) circadian rhythm. We have investigated in normal human male subjects the importance, site of action, and receptor-mediated processes involved in rapid basal corticosteroid feedback and its interaction with corticotrophin releasing hormone (CRH) drive. Pro-opiomelanocortin(More)
Arginine-vasopressin (AVP) is a physiological co-activator of the hypothalamus-pituitary-adrenal (HPA) axis, together with corticotrophin releasing hormone (CRH). A synthetic analogue of AVP, desmopressin (dDAVP), is often used as a pharmacological tool to assess co-activation in health and disease. The relation between dDAVP's neuroendocrine,(More)