Mesopontine median raphe regulates hippocampal ripple oscillation and memory consolidation.

Mesopontine median raphe regulates hippocampal ripple oscillation and memory consolidation.
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中桥中缝调节海马波纹振荡和记忆巩固。

DOI:
10.1038/nn.3998
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发表时间:
2015-05
影响因子:
25
通讯作者:
Ikemoto, Satoshi
Ikemoto, Satoshi
中科院分区:
医学1区
文献类型:
--
作者:
Wang, Dong V.;Yau, Hau-Jie;Broker, Carl J.;Tsou, Jen-Hui;Bonci, Antonello;Ikemoto, Satoshi

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海马体的尖波相关场振荡(~200 Hz),称为“波纹”,被认为对于外显记忆的巩固是重要的。关于涟漪是如何被其他大脑区域调节的,我们知之甚少。在这里,我们表明,中缝区域(MnR)在调节海马涟漪活动和记忆巩固中起着关键作用。我们在体内进行同步记录的MnR和海马,发现当一组MnR神经元活跃,波纹是缺席。一致地,MnR神经元的光遗传学刺激抑制涟漪活性,而这些神经元的抑制增加涟漪活性。重要的是,使用恐惧条件反射程序,我们提供的证据表明,光刺激MnR神经元干扰记忆巩固。我们的研究结果表明MnR在调节涟漪和记忆巩固中的关键作用。
Sharp-wave associated field-oscillations (~200 Hz) of the hippocampus, referred to as “ripples”, are believed to be important for consolidation of explicit memory. Little is known about how ripples are regulated by other brain regions. Here we show that the median raphe region (MnR) plays a key role in regulating hippocampal ripple activity and memory consolidation. We performed in vivo simultaneous recording in the MnR and hippocampus, and found that when a group of MnR neurons were active, ripples were absent. Consistently, optogenetic stimulation of MnR neurons suppressed ripple activity, while inhibition of these neurons increased ripple activity. Importantly, using a fear conditioning procedure, we provided evidence that photostimulation of MnR neurons interfered with memory consolidation. Our results demonstrate a critical role of the MnR in regulating ripples and memory consolidation.
DOI: 10.1016/j.neubiorev.2010.02.001
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