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dc.contributor.authorWhitaker, Leslie R.
dc.contributor.authorCarneiro de Oliveira, Paulo E. [UNESP]
dc.contributor.authorMcPherson, Kylie B.
dc.contributor.authorFallon, Rebecca V.
dc.contributor.authorPlaneta, Cleopatra S. [UNESP]
dc.contributor.authorBonci, Antonello
dc.contributor.authorHope, Bruce T.
dc.date.accessioned2018-11-26T16:48:21Z
dc.date.available2018-11-26T16:48:21Z
dc.date.issued2016-08-01
dc.identifierhttp://dx.doi.org/10.1016/j.biopsych.2015.08.006
dc.identifier.citationBiological Psychiatry. New York: Elsevier Science Inc, v. 80, n. 3, p. 246-256, 2016.
dc.identifier.issn0006-3223
dc.identifier.urihttp://hdl.handle.net/11449/161719
dc.description.abstractBACKGROUND: Learned associations between environmental stimuli and rewards play a critical role in addiction. Associative learning requires alterations in sparsely distributed populations of strongly activated neurons, or neuronal ensembles. Until recently, assessment of functional alterations underlying learned behavior was restricted to global neuroadaptations in a particular brain area or cell type, rendering it impossible to identify neuronal ensembles critically involved in learned behavior. METHODS: We used Fos-GFP transgenic mice that contained a transgene with a Fos promoter driving expression of green fluorescent protein (GFP) to detect neurons that were strongly activated during associative learning, in this case, context-independent and context-specific cocaine-induced locomotor sensitization. Whole-cell electrophysiological recordings were used to assess synaptic alterations in specifically activated GFP-positive (GFP+) neurons compared with surrounding nonactivated GFP-negative (GFP-) neurons 90 min after the sensitized locomotor response. RESULTS: After context-independent cocaine sensitization, cocaine-induced locomotion was equally sensitized by repeated cocaine injections in two different sensitization contexts. Correspondingly, silent synapses in these mice were induced in GFP+ neurons, but not GFP- neurons, after sensitization in both of these contexts. After context-specific cocaine sensitization, cocaine-induced locomotion was sensitized exclusively in mice trained and tested in the same context (paired group), but not in mice that were trained in one context and then tested in a different context (unpaired group). Silent synapses increased in GFP+ neurons, but not in GFP- neurons from mice in the paired group, but not from mice in the unpaired group. CONCLUSIONS: Our results indicate that silent synapses are formed only in neuronal ensembles of the nucleus accumbens shell that are related to associative learning.en
dc.description.sponsorshipNational Institutes of Health National Institute on Drug Abuse Intramural Research Program
dc.description.sponsorshipBrazil (PECO)
dc.format.extent246-256
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofBiological Psychiatry
dc.sourceWeb of Science
dc.subjectAddiction
dc.subjectElectrophysiology
dc.subjectGlutamate
dc.subjectMemory
dc.subjectPsychostimulant
dc.subjectTransgenic
dc.titleAssociative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbensen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionNIDA
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationNIDA, Behav Neurosci Branch, NIH, Intramural Res Program, Baltimore, MD USA
dc.description.affiliationUniv Estadual Paulista, Fac Ciencias Farmaceut, Lab Neuropsicofarmacol, PANT, Araraquara, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Fac Ciencias Farmaceut, Lab Neuropsicofarmacol, PANT, Araraquara, SP, Brazil
dc.identifier.doi10.1016/j.biopsych.2015.08.006
dc.identifier.wosWOS:000379689200013
dc.rights.accessRightsAcesso aberto
dc.identifier.fileWOS000379689200013.pdf
dc.relation.ispartofsjr5,490
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