Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens

Detalhes bibliográficos
Autor(a) principal: Whitaker, Leslie R.
Data de Publicação: 2016
Outros Autores: Carneiro de Oliveira, Paulo E. [UNESP], McPherson, Kylie B., Fallon, Rebecca V., Planeta, Cleopatra S. [UNESP], Bonci, Antonello, Hope, Bruce T.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.biopsych.2015.08.006
http://hdl.handle.net/11449/161719
Resumo: BACKGROUND: 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.
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spelling Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus AccumbensAddictionElectrophysiologyGlutamateMemoryPsychostimulantTransgenicBACKGROUND: 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.National Institutes of Health National Institute on Drug Abuse Intramural Research ProgramBrazil (PECO)NIDA, Behav Neurosci Branch, NIH, Intramural Res Program, Baltimore, MD USAUniv Estadual Paulista, Fac Ciencias Farmaceut, Lab Neuropsicofarmacol, PANT, Araraquara, SP, BrazilUniv Estadual Paulista, Fac Ciencias Farmaceut, Lab Neuropsicofarmacol, PANT, Araraquara, SP, BrazilElsevier B.V.NIDAUniversidade Estadual Paulista (Unesp)Whitaker, Leslie R.Carneiro de Oliveira, Paulo E. [UNESP]McPherson, Kylie B.Fallon, Rebecca V.Planeta, Cleopatra S. [UNESP]Bonci, AntonelloHope, Bruce T.2018-11-26T16:48:21Z2018-11-26T16:48:21Z2016-08-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article246-256application/pdfhttp://dx.doi.org/10.1016/j.biopsych.2015.08.006Biological Psychiatry. New York: Elsevier Science Inc, v. 80, n. 3, p. 246-256, 2016.0006-3223http://hdl.handle.net/11449/16171910.1016/j.biopsych.2015.08.006WOS:000379689200013WOS000379689200013.pdf25147625452809420000-0002-1378-6327Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengBiological Psychiatry5,490info:eu-repo/semantics/openAccess2024-06-24T14:51:40Zoai:repositorio.unesp.br:11449/161719Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:20:51.505185Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
title Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
spellingShingle Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
Whitaker, Leslie R.
Addiction
Electrophysiology
Glutamate
Memory
Psychostimulant
Transgenic
title_short Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
title_full Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
title_fullStr Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
title_full_unstemmed Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
title_sort Associative Learning Drives the Formation of Silent Synapses in Neuronal Ensembles of the Nucleus Accumbens
author Whitaker, Leslie R.
author_facet Whitaker, Leslie R.
Carneiro de Oliveira, Paulo E. [UNESP]
McPherson, Kylie B.
Fallon, Rebecca V.
Planeta, Cleopatra S. [UNESP]
Bonci, Antonello
Hope, Bruce T.
author_role author
author2 Carneiro de Oliveira, Paulo E. [UNESP]
McPherson, Kylie B.
Fallon, Rebecca V.
Planeta, Cleopatra S. [UNESP]
Bonci, Antonello
Hope, Bruce T.
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv NIDA
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Whitaker, Leslie R.
Carneiro de Oliveira, Paulo E. [UNESP]
McPherson, Kylie B.
Fallon, Rebecca V.
Planeta, Cleopatra S. [UNESP]
Bonci, Antonello
Hope, Bruce T.
dc.subject.por.fl_str_mv Addiction
Electrophysiology
Glutamate
Memory
Psychostimulant
Transgenic
topic Addiction
Electrophysiology
Glutamate
Memory
Psychostimulant
Transgenic
description BACKGROUND: 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.
publishDate 2016
dc.date.none.fl_str_mv 2016-08-01
2018-11-26T16:48:21Z
2018-11-26T16:48:21Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.biopsych.2015.08.006
Biological Psychiatry. New York: Elsevier Science Inc, v. 80, n. 3, p. 246-256, 2016.
0006-3223
http://hdl.handle.net/11449/161719
10.1016/j.biopsych.2015.08.006
WOS:000379689200013
WOS000379689200013.pdf
2514762545280942
0000-0002-1378-6327
url http://dx.doi.org/10.1016/j.biopsych.2015.08.006
http://hdl.handle.net/11449/161719
identifier_str_mv Biological Psychiatry. New York: Elsevier Science Inc, v. 80, n. 3, p. 246-256, 2016.
0006-3223
10.1016/j.biopsych.2015.08.006
WOS:000379689200013
WOS000379689200013.pdf
2514762545280942
0000-0002-1378-6327
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Biological Psychiatry
5,490
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 246-256
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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