Pergolide binds tightly to dopamine D2 short receptors and induces receptor sequestration

Journal of Neural Transmission
P BarbierG U Corsini

Abstract

Pergolide is an ergotamine derivative with potent D1 and D2 receptor activity. In this study we showed that pergolide binds tightly to dopamine D2 short receptors, as indicated by the long period of occupancy of the receptors after washing. Furthermore, pergolide induces receptor internalization to a larger extent than dopamine, seeing that no recycling of the receptors to the plasma membrane was observed for either agonist. The dissociation of pergolide from dopamine receptors occurs during the endocytotic process, leaving the receptors accessible to [3H]methylspiperone. Pergolide is a lipophilic compound that can reach and compete with [3H]methylspiperone for binding to sequestered receptors. If internalized receptors are still a target for drug action, pergolide could be a suitable compound of therapeutic interest in cases where receptor sequestration could prevent dopamine efficacy, as in levodopa therapy.

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Citations

Apr 21, 2006·International Journal of Impotence Research·M R Safarinejad
Dec 20, 2015·Journal of Neurochemistry·Nathalie SchmiegClotilde Mannoury la Cour
Mar 21, 2000·Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism·M Laruelle
May 6, 2004·Seminars in Cell & Developmental Biology·Graeme MilliganJuan J Carrillo
Sep 6, 2000·The Journal of Head Trauma Rehabilitation·R D ZafonteN Cullen
Apr 14, 2016·Biochemical Society Transactions·Roberto MaggioMarco Scarselli

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