Abstract
The 5-HT(3) receptor (5-HT(3)R) occupies a special place among the serotonin receptor subtypes because it has been shown to be a ligand-gated ion channel, which is involved in a number of physiological functions and important pathologies. 5-HT(3)R antagonists have shown an outstanding efficacy in the control of the emesis induced by anticancer chemotherapy and few adverse side-effects, so as to revolutionize the treatment of nausea in cancer patients. This review covers the authors' work performed during the past decade in the development of 5-HT(3)R ligands belonging to the class of arylpiperazine derivatives related to quipazine (quipazine-like arylpiperazines, QLAs) and represents the extension of the review previously published in Current Topics in Medicinal Chemistry in 2002. The discussion is focused mainly on the most significant structure-affinity relationships emerged in the progress of the work and shows how the original ideas have evolved in the recent years.
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