在酒精复发期间,禁欲和灭绝驱使条纹活动和多巴胺信号的相反变化
Xueyi Xie1, Ruifeng Chen1, Yufei Huang1
1Department of Neuroscience and Experimental Therapeutics, College of Medicine, Texas A&M University Health Science Center, Bryan, TX, 77807, United States.
Neuropharmacology
|August 23, 2025
概括
酒精使用障碍的复发受到大脑变化的影响. 禁欲会增加多巴胺和神经活动, 而灭绝训练会减少它们, 影响复发的脆弱性.
科学领域:
- 神经科学
- 关于成的研究
- 突触可塑性
背景情况:
- 在治疗酒精使用障碍 (AUD) 中,复发是一个重大挑战.
- 饮酒后持续的神经适应会导致复发.
- 酒后经历对影响复发脆弱性的神经回路的差异性影响尚不清楚.
研究的目的:
- 调查被动戒断 (戒断) 与积极灭绝训练如何对与酒精复发相关的神经回路和突触机制产生差异.
- 检查这些经验对背中带状神经元 (DMS) 直接通路中状神经元 (dMSN) 和诱导酒精寻找过程中的多巴胺动态的对立影响.
主要方法:
- 在D1-Cre大鼠体内纤维光度测量,以测量酒精提示恢复期间的多巴胺释放和dMSN活性.
- 特定途径的光遗传性可塑性协议 (LTD和LTP) 用于操纵皮质状突触.
- 在塑性诱导后评估寻找酒精的行为.
主要成果:
- 在恢复期间,戒断增加了多巴胺释放和dMSN活性.
- 灭绝训练减少了多巴胺的释放,并防止了与戒断相关的dMSN活性升高.
- 在戒酒后诱导长期抑郁 (LTD) 减轻了复发,而在戒酒后诱导长期增强 (LTP) 则恢复了酒精寻求.
结论:
- 酒后经历 (戒酒与消灭) 对多巴胺信号传递和dMSN活动具有相反的影响.
- 在多巴胺依赖的皮质地质可塑性双向介导酒精复发.
- 这种可塑性是以往与酒精有关的经验所塑造的,
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