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Serotonin Receptor and Transporter Ligands - Current Status

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The serotonin (5-HT) receptor system has 14 different subtypes classified by pharmacology and function. Many ligands are widely used for therapeutic and diagnostic purposes in some severe human diseases. Most of the ligands that are specific for each 5-HT receptor have distinctive chemical structures with regard to pharmacophore elements including 4-arylpiperazine, benzimidazole, benzamide, chroman, aminopyridazine, tetralin, and polycycles. However, their affinity and selectivity for 5-HT, dopamine and a1 receptors depend on their substituents and linker spacers. 5-HT transporter inhibitors have also been developed as potential antidepressants. In contrast to classical tricyclic compounds, newly developed secondary amine derivatives such as paroxetine and tetralin show high binding affinity and selectivity. Radioisotope-labeled ligands have also been developed, including [carbonyl-11 C]WAY 100635 for 5-HT1A receptor, [ 11 C or 18 F]ketanserine derivatives for 5-HT2 receptor, [ 125 I]DAIZAC for 5-HT3 receptor, and [ 123 I]IDAM for 5-HT transporter, and these are accumulated in brain regions that are rich in the respective receptors. This review summarizes the recent development of 5-HT receptor- and transporter-specific ligands and their pharmacological properties on the basis of their chemical structures.
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Keywords: G-protein ion channel; Indolyloxadiazole; Metoci opramide; Ondansetron; Transporter Ligands; Zacopride; antidepepressants; central nervous system cns; ht receptor ligands; serotonin HT

Document Type: Review Article

Publication date: 2001-07-01

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