Serotonin receptor signaling pathway (None)

The **serotonin receptor signaling pathway** encompasses the signal-transducing events triggered by serotonin binding to its receptors, which include a diverse group of 14 identified subtypes, grouped into seven major families (5-HT1–7). All but the 5-HT3 subtype are G protein-coupled receptors; 5-HT3 is a ligand-gated ion channel[1][4][5][6]. These receptors mediate diverse physiological effects ranging from neurotransmission, mood regulation, and sleep to cell proliferation and apoptosis[1][3][6]. The pathway is implicated in numerous diseases, including psychiatric disorders, neurodegeneration, and cancer[1][3]. It is commonly targeted by psychotropic drugs, including SSRIs and antipsychotics, which act by modulating receptor activity or serotonin levels[7][3]. Safety concerns include serotonin syndrome and broad systemic side effects resulting from targeting multiple receptors[3][6]. In summary, "Serotonin receptor signaling pathway" is a functional grouping and not an individual canonical molecular target—individual serotonin receptor subtypes are the direct drug targets, not the pathway itself.

Other names

serotonergic signaling pathway5-HT receptor signaling pathwayserotonin-5HT receptor pathway

Activation/inhibition of GPCR signal transduction; Modulation of ion channel activity (5-HT3 only); Alteration of neurotransmitter release or uptake; Epigenetic enyzmatic modification (serotonylation)