大脑和肠道的长度和同时变化是由于吗啡自给药导致的
Kaylee Brunetti1, Zicong Zhou1, Samia Shuchi1
1Department of Pharmacology and Neuroscience, University of North Texas Health Science Center, Fort Worth, Texas, USA.
Addiction biology
|June 11, 2025
概括
吸食阿片类药物会改变肠道微生物群和大脑结构. 肠道变化似乎在大脑变化之前发生,特别是在条体和丘脑中,突出显示了阿片类药物使用障碍中的肠-大脑轴.
科学领域:
- 神经科学是一个神经科学.
- 微生物学 微生物学
- 药理学 药理学 是一个学科.
背景情况:
- 阿片类药物激动剂对阿片类药物和多巴胺基系统产生影响.
- 新兴研究表明肠道微生物组与阿片类药物使用障碍有关.
- 肠-大脑轴 (GBA) 促进大脑和肠之间双向通信,但其在阿片类药物使用中的时空动态尚不清楚.
研究的目的:
- 为了研究在动物慢性吗啡自给药期间肠道和大脑的纵向和并发变化.
- 建立肠道微生物组变化和大脑结构变化之间的时间关系.
主要方法:
- 动物自给药吗啡 (0.4毫克/千克/输注) 持续14天.
- 16S rDNA便分析评估了基线,急性 (2天) 和慢性 (14天) 阶段的肠道微生物群组成.
- 7T核磁共振扫描评估了大脑扩散度指数在同一三个时间点.
主要成果:
- 早在急性阶段就观察到肠道微生物群多样性和丰度的显著变化,持续到慢性阶段.
- 核磁共振扫描显示了扩散性指数的变化,在条形体和thalamus有显著的影响.
- 肠道微生物组的改变先于观察到的大脑结构变化.
结论:
- 吗啡自给药诱导肠道微生物群的早期和持久的变化.
- 条形体和丘脑是受慢性阿片类药物暴露影响的关键大脑区域.
- 在阿片类药物使用障碍中,肠道微生物组的变化可能会先于并通过肠-大脑轴影响大脑变化.
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