Artículo
Surface expression of NMDA receptor changes during memory consolidation in the crab Neohelice granulata
Fecha de publicación:
08/2016
Editorial:
Cold Spring Harbor Laboratory Press
Revista:
Learning & Memory (Cold Spring Harbor, N.Y.)
ISSN:
1072-0502
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The aim of the present study was to analyze the surface expression of the NMDA-like receptors during the consolidation of contextual learning in the crab Neohelice granulata. Memory storage is based on alterations in the strength of synaptic connections between neurons. The glutamatergic synapses undergo various forms of N-methyl-D aspartate receptor (NMDAR)-dependent changes in strength, a process that affects the abundance of other receptors at the synapse and underlies some forms of learning and memory. Here we propose a direct regulation of the NMDAR. Changes in NMDAR's functionality might be induced by the modification of the subunit's expression or cellular trafficking. This trafficking does not only include NMDAR's movement between synaptic and extra-synaptic localizations but also the cycling between intracellular compartments and the plasma membrane, a process called surface expression. Consolidation of contextual learning affects the surface expression of the receptor without affecting its general expression. The surface expression of the GluN1 subunit of the NMDAR is down-regulated immediately after training, up-regulated 3 h after training and returns to nave and control levels 24 h after training. The changes in NMDAR surface expression observed in the central brain are not seen in the thoracic ganglion. A similar increment in surface expression of GluN1 in the central brain is observed 3 h after administration of the competitive GABAA receptor antagonist, bicuculline. These consolidation changes are part of a plasticity event that first, during the down-regulation, stabilizes the trace and later, at 3-h post-training, changes the threshold for synapse activation.
Palabras clave:
Nmdar
,
Crabs
,
Learning And Memory
,
Consolidation
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Licencia
Identificadores
Colecciones
Articulos(IFIBYNE)
Articulos de INST.DE FISIOL., BIOL.MOLECULAR Y NEUROCIENCIAS
Articulos de INST.DE FISIOL., BIOL.MOLECULAR Y NEUROCIENCIAS
Citación
Hepp, Yanil; Salles, Angeles; Carbo, Martin; Pedreira, Maria Eugenia; Freudenthal, Ramiro A. M.; Surface expression of NMDA receptor changes during memory consolidation in the crab Neohelice granulata; Cold Spring Harbor Laboratory Press; Learning & Memory (Cold Spring Harbor, N.Y.); 23; 8; 8-2016; 427-434
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