在饮酒雄性小鼠伏隔核中,矛盾的mTORC1依赖性微小RNA介导的细胞核翻译抑制减弱糖酵解。

Paradoxical mTORC1-Dependent microRNA-mediated Translation Repression in the Nucleus Accumbens of Male Mice Consuming Alcohol Attenuates Glycolysis.

作者信息

Ehinger Yann, Laguesse Sophie, Phamluong Khanhky, Salvi Alexandra, Sei Yoshitaka J, Hoisington Zachary W, Soneja Drishti, Gunasekaran Sowmya, Nakamura Ken, Ron Dorit

机构信息

Department of Neurology, University of California, San Francisco, San Francisco, California, USA.

S.L GIGA-Neurosciences, University of Liege, Liege, Belgium.

出版信息

Nat Commun. 2025 Jul 14;16(1):6116. doi: 10.1038/s41467-025-60337-9.

Abstract

mTORC1 promotes protein translation, learning and memory, and neuroadaptations that underlie alcohol use disorder (AUD). The mechanisms underlying alcohol-mediated mTORC1-dependent neuroadaptations that drive AUD are not well understood. We report that activation of mTORC1 in the nucleus accumbens (NAc) D1 neurons of male mice consuming alcohol results in paradoxical mTORC1-dependent repression of translation of transcripts, including Aldolase A, an essential enzyme in glycolysis. We further show that mTORC1-dependent Aldolase A translation repression in D1 neurons is mediated through upregulation of miR-34a-5p expression. Alcohol-mediated mTORC1 repression of Aldolase A translation in D1 neurons inhibits glycolysis in the NAc. Finally, we report that overexpression of miR-34a-5p in D1 NAc neurons increases, whereas systemic administration of L-lactate, the final product of glycolysis, attenuates excessive alcohol intake. Our data suggest that alcohol promotes paradoxical actions of mTORC1 on translation and glycolysis which in turn drive excessive alcohol use.

摘要

mTORC1促进蛋白质翻译、学习与记忆以及构成酒精使用障碍(AUD)基础的神经适应性变化。酒精介导的驱动AUD的mTORC1依赖性神经适应性变化的潜在机制尚未完全明确。我们报告称,在摄入酒精的雄性小鼠伏隔核(NAc)D1神经元中,mTORC1的激活导致包括醛缩酶A(糖酵解中的一种关键酶)在内的转录本翻译出现矛盾的mTORC1依赖性抑制。我们进一步表明,D1神经元中mTORC1依赖性醛缩酶A翻译抑制是通过上调miR-34a-5p表达介导的。酒精介导的D1神经元中mTORC1对醛缩酶A翻译的抑制作用会抑制NAc中的糖酵解。最后,我们报告称,D1 NAc神经元中miR-34a-5p的过表达会增加酒精摄入量,而糖酵解的终产物L-乳酸的全身给药则会减轻过量饮酒。我们的数据表明,酒精促进了mTORC1在翻译和糖酵解方面的矛盾作用,进而导致过量饮酒。

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