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Inactivation of brain cortex muscarinic receptors by 4-diphenylacetoxy-1-(2-chloroethyl) piperidine mustard

par Waelbroeck, Magali ;Renzetti, Anna Rita;Tastenoy, Michèle ;Barlow, Richard;Christophe, Jean
Référence Biochemical pharmacology, 44, 2, page (285-290)
Publication Publié, 1992

Article révisé par les pairs

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Résumé :

We demonstrated in this study that 4-DAMP [4-diphenylacetoxy-1-(2-chloroethyl) piperidine] mustard, which cyclizes to the aziridinium ion, behaved as a non-selective, non-competitive inhibitor of muscarinic receptors in rat brain cortex. It inactivated to the same extent the M1, M2 and M4 muscarinic receptors present in this tissue, as well as receptors accessible or not accessible to quarternary antimuscarinic drugs. Under mild incubation conditions, the muscarinic receptors in a state with super high affinity for agonists (SH receptors) were less affected by preactivated 4-DAMP mustard than the receptors in the states with lower affinity for agonists (H and L receptors).