The serotonin (5-hydroxytryptamine, 5-HT) receptors have been divided into 7 subfamilies by convention, 6 of which include 13 different genes for G-protein-coupled receptors. Those subfamilies have been characterized by overlapping pharmacological properties, amino acid sequences, gene organization, and second messenger coupling pathways. Post-genomic modifications, such as alternative mRNA splicing or mRNA editing, creates at least 20 more G-protein-coupled 5-HT receptors, such that there are at least 30 distinct 5-HT receptors that signal through G-proteins. This review will focus on what is known about the signaling linkages of the G-protein-linked 5-HT receptors, and will highlight some fascinating new insights into 5-HT receptor signaling.
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http://dx.doi.org/10.1016/s0163-7258(01)00169-3 | DOI Listing |
Drug Metab Pharmacokinet
November 2024
Clinical Research, Drug Development Division, Sumitomo Pharma Co., Ltd., 33-94, Enoki-cho, Suita, Osaka, 564-0053, Japan. Electronic address:
The second-generation antipsychotic blonanserin is a highly selective, full antagonist of dopamine D and D and serotonin 5-HT receptors. It is currently prescribed for patients with schizophrenia in Japan. We aimed to develop a population pharmacokinetic model of oral blonanserin, including data from 12 to 77 years old patients, to assess the covariates that influence blonanserin pharmacokinetics and evaluate appropriate dosage regimens in adolescents versus adults.
View Article and Find Full Text PDFBackground: Psychotic symptoms may manifest in Alzheimer's disease (AD), especially in advanced disease stages and in patients with higher polygenic risk scores for schizophrenia (SCZ-PRS). Such genetic risk seems also to influence grey matter volume (GMV) alterations in patients with psychosis. Since multiple neurotransmitter systems, namely dopamine (DA) and serotonin (5-HT), have been implicated in psychosis, the aim of this study was to investigate whether a SCZ-PRS may explain variance in the association between GMV and the cerebral distribution of DA and 5-HT.
View Article and Find Full Text PDFBackground: Tau protein tangles have been recently shown to accumulate in multiple brainstem nuclei in pre-cortical Alzheimer's disease (AD) stages. The impact of neurotransmission alterations on brain atrophy and their genetic correlates in AD remain unexplored. Therefore, the aims of this study were: 1) to investigate associations between grey matter (GM) loss across the AD continuum and the distribution of multiple neurotransmitter receptors/transporters; 2) to investigate the impact of polygenic risk scores for AD (PRSs) on such associations.
View Article and Find Full Text PDFBackground: A decline in memory is a hallmark of Alzheimer's disease (AD). Experiments in rodents and post-mortem studies in humans with AD suggest that serotonin (5-HT) plays a role in memory, but the molecular and neural mechanisms mediating its effects are unknown.
Method: 100,000 individuals in UK Biobank were studied for the role of serotonin 2C receptor (5-HTR) in the regulation of memory.
Alzheimers Dement
December 2024
Faculty of Medicine, Arish University, Arish, North Sinai, Egypt.
Background: Lingual taste cells (LTCs) are taste buds' sensory cells that modulate gustation. This study's aim is to assess whether it can be successfully implanted in hippocampus, modulating learning and memory deficits observed in Alzheimer's Dementia (AD).
Methods: Retrospective trials on rodents i.
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