Prosapip1-Dependent Synaptic Adaptations in the Nucleus Accumbens Drive Alcohol Intake, Seeking, and Reward.

Prosapip1-Dependent Synaptic Adaptations in the Nucleus Accumbens Drive Alcohol Intake, Seeking, and Reward.
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DOI:
10.1016/j.neuron.2017.08.037
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发表时间:
2017-09-27
期刊:
影响因子:
16.2
通讯作者:
Ron D
Ron D
中科院分区:
医学1区
文献类型:
--
作者:
Laguesse S;Morisot N;Shin JH;Liu F;Adrover MF;Sakhai SA;Lopez MF;Phamluong K;Griffin WC 3rd;Becker HC;Bender KJ;Alvarez VA;Ron D

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雷帕霉素复合体的哺乳动物靶点1(MTORC1)是局部树突翻译的转导因子,参与学习和记忆过程以及饮酒行为的机制。使用一种无偏见的RNA-SEQ方法,我们发现ProSabip1是mTORC1的一个新的下游靶点,其翻译和随之而来的突触蛋白在过度饮酒的小鼠伏隔核(NAC)中表达增加。我们证明了酒精依赖的ProSapip1水平的增加促进了肌动蛋白细丝的形成,导致了NAC中棘神经元(MSN)树突棘形态的改变。我们进一步证明,在NAC壳MSN中,缺乏AMPA受体的GluA2在酒精依赖的突触定位中需要Prosanip1。最后,我们提供了涉及酒精自我给药和奖励机制的数据。综上所述,这些数据表明,NAC中的ProSabip1是结构和突触变化的分子转导,这些变化驱动和/或维持过度饮酒。Laguesse等人。在伏隔核中,ProSabip1是mTORC1的一个新的下游靶点,它促进了肌动蛋白的重组以及形态和突触的改变,这些改变反过来又驱动了饮酒和寻找行为。
The mammalian target of rapamycin complex 1 (mTORC1), a transducer of local dendritic translation, participates in learning and memory processes as well as in mechanisms underlying alcohol-drinking behaviors. Using an unbiased RNA-seq approach, we identified Prosapip1 as a novel downstream target of mTORC1 whose translation and consequent synaptic protein expression are increased in the nucleus accumbens (NAc) of mice excessively consuming alcohol. We demonstrate that alcohol-dependent increases in Prosapip1 levels promote the formation of actin filaments, leading to changes in dendritic spine morphology of NAc medium spiny neurons (MSNs). We further demonstrate that Prosapip1 is required for alcohol-dependent synaptic localization of GluA2 lacking AMPA receptors in NAc shell MSNs. Finally, we present data implicating Prosapip1 in mechanisms underlying alcohol self-administration and reward. Together, these data suggest that Prosapip1 in the NAc is a molecular transducer of structural and synaptic alterations that drive and/or maintain excessive alcohol use. Laguesse et al. identified Prosapip1 as a novel downstream target of mTORC1 in the nucleus accumbens that promotes actin reorganization as well as morphological and synaptic alterations that in turn drive alcohol drinking and seeking behaviors.
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