Balanced dopamine is critical for pattern completion during associative memory recall.

Balanced dopamine is critical for pattern completion during associative memory recall.
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平衡的多巴胺对于联想记忆回忆期间的模式完成至关重要

DOI:
10.1371/journal.pone.0015401
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发表时间:
2010-10-27
期刊:
影响因子:
3.7
通讯作者:
Tsien JZ
Tsien JZ
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Li F;Wang LP;Shen X;Tsien JZ

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模式完成是记忆过程的一个重要特征,是由部分线索引发的完整记忆的提取能力。然而,关于这一过程的分子和细胞机制知之甚少。为了研究多巴胺在记忆回忆中的作用,我们分析了多巴胺转运蛋白杂合基因敲除小鼠(DAT+/−),发现这些小鼠在完全线索条件下具有正常的学习、巩固和记忆回忆,但在部分线索条件下,它们在模式完成方面表现出特定的缺陷。多巴胺转运蛋白杂合基因敲除小鼠中这种形式的记忆回忆缺陷可以通过低剂量的多巴胺拮抗剂氟哌啶醇逆转,进一步证实无法检索记忆模式是多巴胺失衡的结果。因此,我们的研究结果表明,一个微妙的控制大脑的多巴胺水平是至关重要的模式完成在联想记忆回忆。
Pattern completion, the ability to retrieve complete memories initiated by partial cues, is a critical feature of the memory process. However, little is known regarding the molecular and cellular mechanisms underlying this process. To study the role of dopamine in memory recall, we have analyzed dopamine transporter heterozygous knockout mice (DAT+/−), and found that while these mice possess normal learning, consolidation, and memory recall under full cue conditions, they exhibit specific deficits in pattern completion under partial cue condition. This form of memory recall deficit in the dopamine transporter heterozygous knockout mice can be reversed by a low dose of the dopamine antagonist haloperidol, further confirming that the inability to retrieve memory patterns is a result of dopamine imbalance. Therefore, our results reveal that a delicate control of the brain's dopamine level is critical for pattern completion during associative memory recall.
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