Medial prefrontal cortex dopamine controls the persistent storage of aversive memories.

Medial prefrontal cortex dopamine controls the persistent storage of aversive memories.
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DOI:
10.3389/fnbeh.2014.00408
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发表时间:
2014
影响因子:
3
通讯作者:
Medina JH
Medina JH
中科院分区:
医学3区
文献类型:
--
作者:
Gonzalez MC;Kramar CP;Tomaiuolo M;Katche C;Weisstaub N;Cammarota M;Medina JH

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内侧前额叶皮层(mPFC)对于初始记忆处理和表达至关重要,但其在持久记忆存储中的作用却很少被研究。使用海马依赖性抑制性回避学习任务和海马独立的条件性味觉厌恶范式以及特定的多巴胺受体激动剂和拮抗剂,我们发现长期厌恶记忆的持久性而不是形成需要在训练后立即激活 mPFC 中的多巴胺 D1/D5 受体,并且根据任务,在 6 到 12 小时后激活。我们的结果表明,除了众所周知的检索和早期巩固的参与之外,mPFC 还调节长期厌恶记忆的持久性,无论厌恶记忆痕迹的形成是否需要海马体的参与。
Medial prefrontal cortex (mPFC) is essential for initial memory processing and expression but its involvement in persistent memory storage has seldom been studied. Using the hippocampus dependent inhibitory avoidance learning task and the hippocampus-independent conditioned taste aversion paradigm together with specific dopamine receptor agonists and antagonists we found that persistence but not formation of long-term aversive memories requires dopamine D1/D5 receptors activation in mPFC immediately after training and, depending on the task, between 6 and 12 h later. Our results indicate that besides its well-known participation in retrieval and early consolidation, mPFC also modulates the endurance of long-lasting aversive memories regardless of whether formation of the aversive mnemonic trace requires the participation of the hippocampus.
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