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Prosapip1-Dependent Synaptic Adaptations in the Nucleus Accumbens Drive Alcohol Intake, Seeking, and Reward.
Neuron ( IF 14.7 ) Pub Date : 2017-09-08 , DOI: 10.1016/j.neuron.2017.08.037
Sophie Laguesse 1 , Nadege Morisot 1 , Jung Hoon Shin 2 , Feng Liu 1 , Martin F Adrover 2 , Samuel A Sakhai 1 , Marcelo F Lopez 3 , Khanhky Phamluong 1 , William C Griffin 3 , Howard C Becker 4 , Kevin J Bender 1 , Veronica A Alvarez 2 , Dorit Ron 1
Affiliation  

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.

中文翻译:


伏核中 Prosapip1 依赖性突触适应驱动酒精摄入、寻求和奖励。



哺乳动物靶标雷帕霉素复合物 1 (mTORC1) 是局部树突翻译的转导器,参与学习和记忆过程以及饮酒行为的机制。使用无偏见的RNA-seq方法,我们将Prosapip1确定为mTORC1的新下游靶标,其翻译和随后的突触蛋白表达在过度饮酒的小鼠的伏隔核(NAc)中增加。我们证明,酒精依赖性 Prosapip1 水平的增加促进肌动蛋白丝的形成,导致 NAc 中型多棘神经元 (MSN) 的树突棘形态发生变化。我们进一步证明,NAc 壳 MSN 中缺乏 AMPA 受体的 GluA2 的酒精依赖性突触定位需要 Prosapip1。最后,我们提供了表明 Prosapip1 在酒精自我管理和奖励机制中的数据。总之,这些数据表明 NAc 中的 Prosapip1 是结构和突触改变的分子转导器,可驱动和/或维持过度饮酒。
更新日期:2017-09-20
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