title: Serotonin raises the cyclic GMP level in a neuronal cell line via 5-HT3 receptors.
abstract: Serotonin (5-HT) induced a transient rise of the cyclic GMP level in neuroblastoma X glioma hybrid cells, half-maximally at 1 microM 5-HT. 2-Methyl-5-HT displayed an about 5 times lower potency but equal efficacy. alpha-Methyl-5-HT and 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) were completely ineffective at concentrations up to 30 microM. Antagonists specific for 5-HT3 receptors, ICS 205-930, GR 38032 F and MDL 72222, blocked the response to 5-HT at nanomolar concentrations but antagonists directed towards 5-HT1 and 5-HT2 receptors, ketanserin and methysergide, had no effect at concentrations up to 1 microM. Thus, 5-HT3 receptors are responsible for activating guanylate cyclase in the hybrid cells.
authors.affiliation: Physiologisch-chemisches Institut, Universität Tübingen, F.R.G.
authors.forename: G
authors.initials: G
authors.lastname: Reiser
authors.forename: B
authors.initials: B
authors.lastname: Hamprecht
mesh_terms: D017371:8-Hydroxy-2-(di-n-propylamino)tetralin; D000818:Animals; D002460:Cell Line; D000242:Cyclic AMP / Q000378:metabolism*; D006152:Cyclic GMP / Q000378:metabolism; D005910:Glioma / Q000378:metabolism; D051379:Mice; D009447:Neuroblastoma / Q000378:metabolism; D009474:Neurons / Q000187:drug effects / Q000378:metabolism*; D011985:Receptors, Serotonin / Q000378:metabolism*; D012701:Serotonin / Q000031:analogs & derivatives / Q000378:metabolism / Q000494:pharmacology*; D013764:Tetrahydronaphthalenes / Q000494:pharmacology; D014407:Tumor Cells, Cultured / Q000187:drug effects / Q000378:metabolism*
chemical_list: D011985:Receptors, Serotonin; D013764:Tetrahydronaphthalenes; C042390:alpha-methylserotonin; D012701:Serotonin; D017371:8-Hydroxy-2-(di-n-propylamino)tetralin; D000242:Cyclic AMP; D006152:Cyclic GMP