Hyperactivity induced by the dopamine D-2/D-3 receptor agonist quinpirole is attenuated by inhibitors of endocannabinoid degradation in mice

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dc.contributor.authorLuque-Rojas, María Jesús
dc.contributor.authorGaleano, Pablo
dc.contributor.authorSuárez, Juan
dc.contributor.authorAraos, Pedro
dc.contributor.authorSantín Núñez, Luis Javier
dc.contributor.authorRodríguez de Fonseca, Fernando
dc.contributor.authorBlanco Calvo, Eduardo
dc.date.accessioned2015-02-13T15:20:24Z
dc.date.available2015-02-13T15:20:24Z
dc.date.issued2013-04-01
dc.date.updated2015-02-13T15:20:24Z
dc.description.abstractThe present study was designed to investigate the effect of pharmacological inhibition of endocannabinoid degradation on behavioural actions of the dopamine D-2/D-3 receptor agonist quinpirole in male C57Bl/6J mice. In addition, we studied the effects of endocannabinoid degradation inhibition on both cocaine-induced psychomotor activation and behavioural sensitization. We analysed the effects of inhibition of the two main endocannabinoid degradation enzymes : fatty acid amide hydrolase (FAAH), using inhibitor URB597 (1 mg/kg); monoacylglycerol lipase (MAGL), using inhibitor URB602 (10 mg/kg). Administration of quinpirole (1 mg/kg) caused a temporal biphasic response characterized by a first phase of immobility (0-50 min), followed by enhanced locomotion (next 70 min) that was associated with the introduction of stereotyped behaviours (stereotyped jumping and rearing). Pretreatment with both endocannabinoid degradation inhibitors did not affect the hypoactivity actions of quinpirole. However, this pretreatment resulted in a marked decrease in quinpirole-induced locomotion and stereotyped behaviours. Administration of FAAH or MAGL inhibitors did not attenuate the acute effects of cocaine. Furthermore, these inhibitors did not impair the acquisition of cocaine-induced behavioural sensitization or the expression of cocaine-induced conditioned locomotion. Only MAGL inhibition attenuated the expression of an already acquired cocaine-induced behavioural sensitization. These results suggest that pharmacological inhibition of endocannabinoid degradation might exert a negative feedback on D-2/D-3 receptor-mediated hyperactivity. This finding might be relevant for therapeutic approaches for either psychomotor disorders (dyskinesia, corea) or disorganized behaviours associated with dopamine-mediated hyperactivity.
dc.format.mimetypeapplication/pdf
dc.identifier.doihttps://doi.org/10.1017/S1461145712000569
dc.identifier.idgrec020239
dc.identifier.issn1461-1457
dc.identifier.urihttp://hdl.handle.net/10459.1/47965
dc.language.isoeng
dc.publisherOxford University Press
dc.publisherCollegium Internationale Neuro-Psychopharmacologicum (CINP)
dc.relation.isformatofReproducció del document publicat a: https://doi.org/10.1017/S1461145712000569
dc.relation.ispartofInternational Journal of Neuropsychopharmacology, 2013, vol. 16, núm. 3, p. 661-676
dc.rights(c) CINP (Collegium Internationale Neuro-Psychopharmacologicum) , 2013
dc.rightscc-by-nc (c) Collegium Internationale Neuro-Psychopharmacologicum (CINP) , 2013
dc.rightscc-by-nc (c) Oxford University Press, 2013
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.rights.urihttps://creativecommons.org/licenses/by-nc/3.0/
dc.subjectCocaine
dc.subjectDopamine
dc.subjectEndocannabinoid system
dc.subjectQuinpirole
dc.subjectStereotyped behaviour
dc.subject.classificationDopamina
dc.subject.otherDopamine
dc.titleHyperactivity induced by the dopamine D-2/D-3 receptor agonist quinpirole is attenuated by inhibitors of endocannabinoid degradation in mice
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
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