消退并不是阻止恐惧记忆在基底外侧杏仁核中进行重新巩固的充分条件。

Extinction is not a sufficient condition to prevent fear memories from undergoing reconsolidation in the basolateral amygdala.

作者信息

Duvarci Sevil, Mamou Cyrinne Ben, Nader Karim

机构信息

W.M. Keck Foundation Laboratory of Neurobiology, Center for Neural Science, New York University, NY, USA.

出版信息

Eur J Neurosci. 2006 Jul;24(1):249-60. doi: 10.1111/j.1460-9568.2006.04907.x.

Abstract

Consolidated memories when reactivated may return to a state that requires protein synthesis in order to be restabilized (reconsolidation). It has been shown in a variety of systems that if reactivation induces significant extinction then extinction is the protein synthesis dependent memory state, rather than reconsolidation. Thus, extinction consolidation may prevent the memory from undergoing reconsolidation. We investigated whether such an interaction also exists between extinction and reconsolidation of fear memories within the amygdala, by using a within subjects experimental design. We found that inhibition of protein synthesis in the basolateral amygdala (BLA) impaired reconsolidation for both the briefly reactivated and extinguished fear memories suggesting that extinction is not a sufficient condition to prevent induction of reconsolidation in the amygdala. These findings demonstrate that extinction consolidation does not always interact with reconsolidation. Therefore, under these conditions, extinction is not a boundary condition on reconsolidation of fear memories in the basolateral amygdala.

摘要

重新激活时,整合的记忆可能会回到一种需要蛋白质合成才能重新稳定(重新巩固)的状态。在各种系统中已经表明,如果重新激活引发显著的消退,那么消退就是依赖蛋白质合成的记忆状态,而非重新巩固。因此,消退巩固可能会阻止记忆进行重新巩固。我们通过采用被试内实验设计,研究了杏仁核内恐惧记忆的消退与重新巩固之间是否也存在这种相互作用。我们发现,抑制基底外侧杏仁核(BLA)中的蛋白质合成会损害短暂重新激活和消退的恐惧记忆的重新巩固,这表明消退并非阻止杏仁核中重新巩固诱导的充分条件。这些发现表明,消退巩固并不总是与重新巩固相互作用。因此,在这些条件下,消退并非基底外侧杏仁核中恐惧记忆重新巩固的边界条件。

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