Dopamine is required for learning and forgetting in Drosophila.

Dopamine is required for learning and forgetting in Drosophila.
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DOI:
10.1016/j.neuron.2012.04.007
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发表时间:
2012-05-10
期刊:
影响因子:
16.2
通讯作者:
Davis RL
Davis RL
中科院分区:
医学1区
文献类型:
--
作者:
Berry JA;Cervantes-Sandoval I;Nicholas EP;Davis RL

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人类的心理学研究和模式生物的行为学研究表明,遗忘是一种常见的生物调节过程,但对遗忘的分子、细胞和电路机制知之甚少。在这里,我们表明,一个小的多巴胺神经元(DAN)的嗅觉学习后的双向调制调节惩罚(厌恶)和奖励(食欲)的记忆的遗忘率。这些DAN中的两个,MP1和MV1,在学习之前和之后的活着和清醒的苍蝇中表现出蘑菇体神经元的同步持续活动,如功能性细胞成像所揭示的。此外,虽然蘑菇体表达的dDA 1多巴胺受体是必不可少的记忆的收购,我们表明,多巴胺受体DAMB,也高度表达在蘑菇体神经元,是需要遗忘。我们提出多巴胺的双重作用:通过dDA 1信号传导获得记忆,并通过蘑菇体神经元中的DAMB信号传导进行遗忘。
Psychological studies in humans and behavioral studies of model organisms suggest that forgetting is a common and biologically regulated process, but the molecular, cellular, and circuit mechanisms underlying forgetting are poorly understood. Here we show that the bidirectional modulation of a small subset of dopamine neurons (DANs) after olfactory learning regulates the rate of forgetting of both punishing (aversive) and rewarding (appetitive) memories. Two of these DANs, MP1 and MV1, exhibit synchronized ongoing activity in the mushroom body neuropil in alive and awake flies before and after learning, as revealed by functional cellular imaging. Furthermore, while the mushroom-body-expressed dDA1 dopamine receptor is essential for the acquisition of memory, we show that the dopamine receptor DAMB, also highly expressed in mushroom body neurons, is required for forgetting. We propose a dual role for dopamine: memory acquisition through dDA1 signaling and forgetting through DAMB signaling in the mushroom body neurons.
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