The role of mitochondrial stress response in alcohol-mediated neurotoxicity

长期过量饮酒会导致局部结构性脑损伤和认知障碍。慢性 酒精滥用还与各种各样的行动障碍有关。长期饮酒 单独或与酒精性肝性脑病一起，可引起各种类型的震颤、震颤， 小脑功能障碍虽然酒精引起的脑损伤已经被解释为酒精对神经系统的影响， 兴奋性或营养缺乏，我们不完全了解致病机制的分子和 酒精通过细胞水平发挥其毒性并损害神经系统。线虫C. elegans 是一个顺从的模式生物，可用于解剖酒精的病理机制， 神经毒性我们在C. elegans表明，虽然酒精强烈诱导许多保守的细胞， 应激反应，其主要毒性作用集中在线粒体功能上。值得注意的是，我们发现， 永久性线粒体未折叠蛋白反应（UPRmt）避免了运动功能缺陷， 慢性酒精暴露此外，特异性诱导神经元特异性UPRmt 激活足以防止酒精介导的运动损伤。我们假设 在选定的神经群中激活UPRmt的分支可防止酒精性运动障碍。到 为了验证这一假设，我们提出了两个具体目标：目标1将研究永久性UPRmt如何防止 酒精介导的运动障碍;目标2将确定神经元UPRmt导致运动障碍的机制。 对酒精介导的运动障碍的保护。详细分析了酒精介导的 在酒精介导的运动障碍的背景下，UPRmt及其细胞内和细胞间信号传导将 导致有效的可药物化的靶点，其防止或改善酒精性运动损伤。

Chronic, excessive alcohol use causes regional structural brain damage and cognitive disorders. Chronic alcohol misuse is also associated with a wide array of movement impairments. Chronic alcohol consumption alone, or together with alcoholic hepatic encephalopathy, can cause various types of tremor, asterixis, and cerebellar dysfunction. While alcohol-induced brain damage has been explained by alcohol’s effects on neural excitability or nutritional deficiency, we do not fully understand the pathogenic mechanism at the molecular and cellular levels by which alcohol exerts its toxicity and damages the nervous system. The nematode C. elegans is an amenable model organism that can be used for dissecting the pathological mechanism of alcoholic neurotoxicity. Our study in C. elegans shows that while alcohol strongly induces many conserved cellular stress responses, its main toxic effects are centered on mitochondrial function. Remarkably, we find that perpetual mitochondrial unfolded protein response (UPRmt) spares from a motor function deficit caused by chronic alcohol exposure. Moreover, a genetic manipulation that specifically induces neuron-specific UPRmt activation is sufficient to protect against alcohol-mediated movement impairment. We hypothesize that activation of a branch of UPRmt in a select neural population protects against alcoholic movement disorders. To test this hypothesis, we propose two specific aims: aim 1 will investigate how perpetual UPRmt protects against alcohol-mediated movement impairment; and aim 2 will identify the mechanism by which neuronal UPRmt leads to the protection against alcohol-mediated movement impairment. A detailed analysis of alcohol-mediated UPRmt and its intra- and intercellular signaling in the context of alcohol-mediated movement impairment will lead to effective druggable targets that protect against, or ameliorate, alcoholic movement impairment.