肠道微生物产生的伊米达驱动帕金森病理
Hyunji Park1, Jiwon Cheon2, Hyojung Kim2
1Department of Life Sciences, Pohang University of Science and Technology, Pohang, Republic of Korea.
Nature communications
|September 5, 2025
概括
帕金森病 (PD) 可能由肠道细菌 (如Streptococcus mutans) 引起,这些细菌会产生伊米达 propionate (ImP). 这种微生物代谢物进入大脑, 导致神经退化和PD症状.
科学领域:
- 神经科学
- 微生物学
- 胃肠病学
背景情况:
- 帕金森病 (PD) 涉及多巴胺基神经元损失和α- 协核蛋白聚合.
- 肠道微生物组在患病中的作用正在出现,微生物代谢物作为潜在的调解物.
- 导致PD神经退行症的特定肠道微生物和代谢物仍未确定.
研究的目的:
- 确定与帕金森病相关的特定肠道微生物和代谢物.
- 调查肠道衍生代谢物是否可以诱导大脑的神经退行.
- 阐明微生物代谢物导致PD病理的机制.
主要方法:
- 分析了PD患者的肠道微生物群和血意达 propionate (ImP).
- 殖民的小鼠感染了突变性链球菌或表达UrdA的工程大肠杆菌.
- 给小鼠注射ImP,并评估PD类症状和病理.
- 研究了mTORC1信号在观察到的病理中的作用.
主要成果:
- 在PD患者中发现S. 突变体,UrdA和ImP的升高.
- S. mutans殖民增加了系统和大脑的IMP,在小鼠中诱导了类似PD的症状.
- 单独使用ImP可以复制PD的关键特征,包括神经退行和运动缺陷.
- S. mutans加剧了α- 协核素病理;mTORC1的激活是至关重要的.
结论:
- 确定了S. mutans中的UrdA-ImP轴作为PD的微生物驱动因素.
- 已经证明微生物IMP在PD中直接介导肠-大脑轴病理.
- 已确定ImP是导致帕金森病中多巴胺基神经退行的一个关键代谢物.
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