title: EMD 281014, a new selective serotonin 5-HT2A receptor antagonist.
abstract: The 5-HT2A receptor ligand 7-[4-[2-(4-fluoro-phenyl)-ethyl]-piperazine-1-carbonyl]-1H-indole-3-carbonitrile HCl (EMD 281014) selectively binds to human (h) and rat 5-HT2A receptors (IC50 values 0.35 and 1 nM, respectively; vs. 1334 nM for h5-HT2C) and inhibited 5-HT-stimulated [35S]guanosine 5'-O-3-thiotriphosphate (GTPgammaS)-accumulation in h5-HT2A transfected Chinese hamster ovary cells (IC50 9.3 nM). EMD 28014 counteracted the N-ethoxycarbonyl-2-ethoxy-1,2-dihydroquinoline (EEDQ)-induced decrease of [3H]ketanserin binding in rat frontal cortex (ID50 0.4 mg/kg p.o.) and R-(-)-1-(2,5-dimethoxy-4-iodophenyl)-aminopropane (DOI)-induced head-twitch behaviour in mice (ID50 0.01 mg/kg s.c., 0.06 mg/kg p.o.), demonstrating unique selectivity and efficacy.
authors.affiliation: Department of CNS Research, Preclinical Research Merck KGaA, 64271 Darmstadt, Germany. Gerd.Bartoszyk@merck.de
authors.forename: Gerd D
authors.initials: GD
authors.lastname: Bartoszyk
authors.forename: Christoph
authors.initials: C
authors.lastname: van Amsterdam
authors.forename: Henning
authors.initials: H
authors.lastname: Böttcher
authors.forename: Christoph A
authors.initials: CA
authors.lastname: Seyfried
mesh_terms: D000818:Animals; D001921:Brain / Q000378:metabolism; D016466:CHO Cells; D006224:Cricetinae; D006801:Humans; D007211:Indoles / Q000008:administration & dosage / Q000494:pharmacology*; D008297:Male; D051379:Mice; D010879:Piperazines / Q000008:administration & dosage / Q000494:pharmacology*; D011619:Psychotropic Drugs / Q000008:administration & dosage / Q000494:pharmacology*; D011869:Radioligand Assay; D058830:Serotonin 5-HT2 Receptor Antagonists
chemical_list: C484815:EMD 281014; D007211:Indoles; D010879:Piperazines; D011619:Psychotropic Drugs; D058830:Serotonin 5-HT2 Receptor Antagonists