Calcium-permeable AMPA receptor dynamics mediate fear memory erasure.
Calcium-permeable AMPA receptor dynamics mediate fear memory erasure.
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DOI:
10.1126/science.1195298
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发表时间:
2010-11-19
期刊:
影响因子:
--
通讯作者:
Huganir RL
中科院分区:
文献类型:
--
作者:
Clem RL;Huganir RL
Traumatic fear memories can be inhibited by behavioral therapy for humans, or by extinction training in rodent models, but are prone to recur. Under some conditions, however, these treatments generate a permanent effect on behavior, which suggests that emotional memory erasure has occurred. The neural basis for such disparate outcomes is unknown. We found that a central component of extinction-induced erasure is the synaptic removal of calcium-permeable α-amino-3-hydroxyl-5-methyl-4-isoxazole-propionate receptors (AMPARs) in the lateral amygdala. A transient up-regulation of this form of plasticity, which involves phosphorylation of the glutamate receptor 1 subunit of the AMPA receptor, defines a temporal window in which fear memory can be degraded by behavioral experience. These results reveal a molecular mechanism for fear erasure and the relative instability of recent memory.
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