神经元中的益生菌感应机制,启动了对病原体防御的肠道线粒体监测
Huimin Liu1, Panpan Chen1, Xubo Yang1
1Southwest United Graduate School, Yunnan Key Laboratory of Cell Metabolism and Diseases, Center for Life Sciences, School of Life Sciences, State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan, Yunnan University, Kunming, China.
Cell reports
|November 27, 2024
概括
研究人员发现了一种新的益生菌大肠杆菌突变,可以增强宿主感染保护. 这通过通过神经元-肠道通信激活线粒体展开蛋白质反应 (UPRmt),改善病原体防御.
科学领域:
- 微生物学和免疫学
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
背景情况:
- 主体的生存取决于微生物对病原体的防御机制.
- 了解细菌与宿主之间的相互作用,特别是在细胞内监控系统中,至关重要但复杂.
- 线粒体展开的蛋白质反应 (UPRmt) 在细胞应激适应中起作用.
研究的目的:
- 开发一种查系统,用于识别增强宿主防御的有益细菌 (益生菌).
- 阐明特定细菌触发宿主保护反应的分子机制.
- 为了发现神经元和肠道之间的新型通信途径,以响应微生物刺激.
主要方法:
- 开发了一种使用大肠杆菌突变体的"益生菌"查系统.
- 利用遗传查来识别参与细菌感知和反应的关键宿主因素.
- 研究的信号通路包括神经,GPCR,Wnt信号和内酶抑制剂.
主要成果:
- 鉴定了一种埃舍里希亚大肠杆菌突变 (ΔymcB),可以保护人免受 Pseudomonas aeruginosa PA14 感染.
- 发现MDSS-1,ASE神经元中的神经元跨膜蛋白,作为DymcB的关键传感器.
- 证明MDSS-1激活触发肠道UPRmt,增强宿主保护和抗感染能力.
结论:
- 发现了一种新的神经元-肠沟通轴,用于微生物传感和宿主防御.
- ASE神经元检测特定的细菌信号 (ΔymcB) 并在肠道中启动保护性线粒体反应.
- 这种机制突出了通过UPRmt调制来适应宿主对微生物挑战的新途径.
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