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- W2128772004 abstract "Molecular accounts of memory consolidation suggest that new learning generates persistent synaptic modifications through activation of an extensive set of neuronal receptors and intracellular signal transduction pathways, accompanied by RNA and protein synthesis. This traditional cellular consolidation theory has been challenged by evidence that reactivation of a previously consolidated memory might render this memory again susceptible to disruption by amnesic treatments, a process generally referred to as reconsolidation. Current evidence indicates that reconsolidation can be disrupted by administration of a variety of pharmacological agents after memory reactivation. Previous studies have indicated that the gastrin-releasing preferring type of bombesin receptor (GRPR) and the N-methyl-D-aspartate glutamate receptor (NMDAR) in the rat hippocampus are involved in consolidation of inhibitory avoidance (IA), a fear-related memory task. We show here that blockade of hippocampal GRPRs or NMDARs after memory reactivation temporarily disrupts memory retention. Post-retrieval intra-hippocampal infusion of the GRPR antagonist RC-3095 or the NMDAR antagonist aminophosphonopentanoic acid (AP5) produced an impairment of IA performance tested 2 days after training in rats. However, this impairment was transient and recovered to levels of control rats in a subsequent test 3 days after training. The drug effects were only present after memory reactivation and not in its absence. These findings provide evidence that GRPR or NMDAR inactivation after retrieval can impair fear memory." @default.
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- W2128772004 date "2008-02-01" @default.
- W2128772004 modified "2023-10-16" @default.
- W2128772004 title "Transient Disruption of Fear-Related Memory by Post-Retrieval Inactivation of Gastrin-Releasing Peptide or N-Methyl-D-Aspartate Receptors in the Hippocampus" @default.
- W2128772004 doi "https://doi.org/10.2174/156720208783565672" @default.
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