Trent, S, Barnes, P, Hall, J and Thomas, KL (2017) AMPA receptors control fear extinction through an Arc-dependent mechanism. Learning & Memory, 24 (8). 375 - 380. ISSN 1549-5485

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Activity-regulated cytoskeleton-associated protein (Arc) supports fear memory through synaptic plasticity events requiring actin cytoskeleton rearrangements. We have previously shown that reducing hippocampal Arc levels through antisense knockdown leads to the premature extinction of contextual fear. Here we show that the AMPA receptor antagonist CNQX elevates hippocampal Arc levels during extinction and blocks extinction that can be rescued by reducing Arc. Increasing Arc levels with CNQX also overcomes the actin-destabilizing properties of cytochalasin D and promotes extinction. Therefore, extinction is dependent on AMPA-mediated reductions of Arc via a mechanism consistent with a role for Arc in stabilizing the actin cytoskeleton to constrain extinction.

Item Type: Article
Additional Information: This article is distributed exclusively by Cold Spring Harbor Laboratory Press for the first 12 months after the full-issue publication date (see After 12 months, it is available under a Creative Commons License (Attribution-NonCommercial 4.0 International), as described at
Uncontrolled Keywords: AMPA receptors, Arc-dependent mechanism
Subjects: Q Science > Q Science (General)
R Medicine > R Medicine (General)
Divisions: Faculty of Natural Sciences > School of Life Sciences
Depositing User: Symplectic
Date Deposited: 26 Feb 2020 14:52
Last Modified: 04 Nov 2020 15:16

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