title: Localization of a new benzamide derivative, tropapride and of 1-sulpiride, in the pituitary gland of the rat.
abstract: Localization of tropapride and 1-sulpiride in the pituitary gland of the rat has been studied. A comparison of the ratio of total radioactivity in pituitary/total radioactivity in blood after i.p. administration shows that 1-sulpiride has a greater and more persistent localization in the pituitary than tropapride. Tropapride is present in this gland at 0.16 microM concentration 1 hour after an oral dose of 0.4 mg/kg, which is the ED50 value in a test related to neuroleptic activity: the antagonism of apomorphine-induced stereotypies. 1-Sulpiride, administered orally at doses near the ED50 value in the same test, gives after 1 hour pituitary concentrations at least thousand times greater.
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001058:Apomorphine / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007274:Injections, Intraperitoneal; D008297:Male; D009662:Nortropanes / Q000378:metabolism* / Q000494:pharmacology; D010902:Pituitary Gland / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D013239:Stereotyped Behavior / Q000187:drug effects; D013469:Sulpiride / Q000378:metabolism* / Q000494:pharmacology
chemical_list: D009662:Nortropanes; C039413:tropapride; D013469:Sulpiride; D001058:Apomorphine