Sodium-Dependent Interaction of Benzamides with Dopamine Receptors in Rat and Dog Anterior Pituitary Glands

Abstract
Sulpiride and other benzamides'' [butaclamol, sultopride, clebopride, tiapride, 2-amino-6,7-dihydroxytetralin, dopamine, serotonin, haloperidol, fluphenazine, apomorphine] displacement of [3H]-spiroperidol binding to rat and dog anterior pituitary dopaminergic receptors was selectively Na dependent, while typical neuroleptic activity was not influenced by NaCl. These results evidently indicate the existence in the anterior pituitary of a subpopulation of dopaminergic receptors with which benzamides interact.