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Artículo

Dopamine D1/D5 receptors in the dorsal hippocampus are required for the acquisition and expression of a single trial cocaine-associated memory

Kramar, Cecilia PaulaIcon ; Barbano, María FlaviaIcon ; Medina, Jorge HoracioIcon
Fecha de publicación: 12/2014
Editorial: Elsevier Inc
Revista: Neurobiology of Learning and Memory
ISSN: 1074-7427
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Neurociencias

Resumen

The role of the hippocampus in memory supporting associative learning between contexts and unconditioned stimuli is well documented. Hippocampal dopamine neurotransmission modulates synaptic plasticity and memory processing of fear-motivated and spatial learning tasks. Much less is known about the involvement of the hippocampus and its D1/D5 dopamine receptors in the acquisition, consolidation and expression of memories for drug-associated experiences, more particularly, in the processing of single pairing cocaine conditioned place preference (CPP) training. To determine the temporal dynamics of cocaine CPP memory formation, we trained rats in a one-pairing CPP paradigm and tested them at different time intervals after conditioning. The cocaine-associated memory lasted 24 h but not 72 h. Then, we bilaterally infused the dorsal hippocampus with the GABA A receptor agonist muscimol or the D1/D5 dopamine receptor antagonist SCH 23390 at different stages to evaluate the mechanisms involved in the acquisition, consolidation or expression of cocaine CPP memory. Blockade of D1/D5 dopamine receptors at the moment of training impaired the acquisition of cocaine CPP memories, without having any effect when administered immediately or 12 h after training. The expression of cocaine CPP memory was also affected by the administration of SCH 23390 at the moment of the test. Conversely, muscimol impaired the consolidation of cocaine CPP memory only when administered 12 h post conditioning. These findings suggests that dopaminergic inputs to the dorsal hippocampus are required for the acquisition and expression of one trial cocaine-associated memory while neural activity of this structure is required for the late consolidation of these types of memories.
Palabras clave: Cocaine , Hippocampus , Memory , Dopamine , One Pairing Cpp
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Atribución-NoComercial-SinDerivadas 2.5 Argentina (CC BY-NC-ND 2.5 AR)
Identificadores
URI: http://hdl.handle.net/11336/17388
URL: http://www.sciencedirect.com/science/article/pii/S107474271400183X
DOI: http://dx.doi.org/10.1016/j.nlm.2014.10.004
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Articulos(IBCN)
Articulos de INST.DE BIOLO.CEL.Y NEURCS."PROF.E.DE ROBERTIS"
Citación
Kramar, Cecilia Paula; Barbano, María Flavia; Medina, Jorge Horacio; Dopamine D1/D5 receptors in the dorsal hippocampus are required for the acquisition and expression of a single trial cocaine-associated memory; Elsevier Inc; Neurobiology of Learning and Memory; 116; 12-2014; 172-180
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