TY - JOUR
T1 - Taste novelty induces intracellular redistribution of NR2A and NR2B subunits of NMDA receptor in the insular cortex
AU - Núñez-Jaramillo, Luis
AU - Jimenez, Beatriz
AU - Ramirez-Munguía, Nadia
AU - Delint-Ramírez, Ilse
AU - Luna-Illades, Claudio
AU - Tapia, Ricardo
AU - Bermúdez-Rattoni, Federico
PY - 2008/6/18
Y1 - 2008/6/18
N2 - Taste recognition memory is a process by which animals associate a taste previously experienced with its gastric consequences. Novel taste presentation induces in the insular cortex biochemical modifications that decrease after the taste becomes familiar. Here we show that, in this cortex, consumption of a novel taste produces an increase of the NR2A and NR2B subunits of the NMDA receptor in the detergent resistant membrane (DRM) fraction. This increase did not occur in the adjacent parietal cortex, was not due to a change in the total amount of protein, and is related with the novelty of the stimulus since it was reduced after the taste became familiar. Furthermore, NR2A and NR2B subunits increase in the DRM was blocked by the injection of a muscarinic acetylcholine receptor antagonist. These results suggest that modulation of NMDA receptors in the insular cortex through the increase of its NR2A and NR2B subunits in the DRM is involved in the taste memory formation via a cholinergic process.
AB - Taste recognition memory is a process by which animals associate a taste previously experienced with its gastric consequences. Novel taste presentation induces in the insular cortex biochemical modifications that decrease after the taste becomes familiar. Here we show that, in this cortex, consumption of a novel taste produces an increase of the NR2A and NR2B subunits of the NMDA receptor in the detergent resistant membrane (DRM) fraction. This increase did not occur in the adjacent parietal cortex, was not due to a change in the total amount of protein, and is related with the novelty of the stimulus since it was reduced after the taste became familiar. Furthermore, NR2A and NR2B subunits increase in the DRM was blocked by the injection of a muscarinic acetylcholine receptor antagonist. These results suggest that modulation of NMDA receptors in the insular cortex through the increase of its NR2A and NR2B subunits in the DRM is involved in the taste memory formation via a cholinergic process.
KW - Detergent resistant membranes
KW - Learning
KW - Taste recognition memory
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U2 - 10.1016/j.brainres.2008.03.032
DO - 10.1016/j.brainres.2008.03.032
M3 - Article
C2 - 18468585
AN - SCOPUS:44649157033
SN - 0006-8993
VL - 1215
SP - 116
EP - 122
JO - Brain Research
JF - Brain Research
ER -