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- W2034005051 abstract "In a drug discrimination paradigm, the 5-HT2A/2C receptor antagonists, ritanserin, ICI 169,369 (2-(2-dimethylaminoethylthio-3-phenylquinoline hydrochloride) and mianserin, and the preferential 5-HT2A receptor antagonist, ketanserin, antagonised the discriminative stimulus effects of the 5-HT2A/2C receptor agonist, DOI ((2,5-dimethoxy-4-iodohenyl)-2-aminopropan) (0.63 mg/kg i.p.). Effective dose50 (ED50) values were: 0.32, 0.39, 0.15 and 0.03 mg/kg s.c., respectively. While the novel, selective 5-HT2C receptor antagonist, SB 200,646 (N-(1-methyl-5-iodolyl)-N′-(3-pyridyl) urea hydrochloride) was inactive (10 mg/kg s.c. and 20 mg/kg p.o.), the highly selective 5-HT2A receptor antagonist, MDL 100,907 (R-(+)-α-(2,3-dimethoxyphenyl)-1-[2-(4- fluorophenylethyl]-4-piperidine-methanol) very potently (ED50 = 0.0006) abolished the action of DOI. MDL 100,907 may display antipsychotic properties and the ‘atypical’ antipsychotics, clozapine, risperidone and sertindole, each of which possesses marked affinity at 5-HT2A receptors, abolished the discriminative stimulus effects of DOI (ED50 values of 0.07, 0.03 and 0.33 mg/kg, respectively). In contrast, haloperidol (0.16) was ineffective. These data demonstrate that 5-HT2A receptors mediate the discriminative stimulus effects of DOI and support the hypothesis that an antagonistic action at 5-HT2A receptors contributes to the in vivo actions of ‘atypical’ antipsychotics." @default.
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- W2034005051 title "Blockade of the discriminative stimulus effects of DOI by MDL 100,907 and the ‘atypical’ antipsychotics, clozapine and risperidone" @default.
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- W2034005051 doi "https://doi.org/10.1016/0014-2999(94)90643-2" @default.
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