Acanthamoeba castellanii作为揭示Campylobacter jejuni宿主-病原体动态的一个模型
Fauzy Nasher1, Burhan Lehri1, Richard A Stabler1
1Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, United Kingdom.
Frontiers in cellular and infection microbiology
|July 3, 2025
概括
坎比洛巴克特 (Campylobacter jejuni) 在环境中通过与Acanthamoeba相互作用而存活,Acanthamoeba改变宿主细胞代谢,并通过CjeN引发细菌DNA损伤. 这种互动为病原体生存策略提供了洞察力.
科学领域:
- 微生物学 微生物学
- 环境科学 环境科学
- 宿主-病原体相互作用
背景情况:
- 尽管Campylobacter jejuni具有微气友性质,但其在环境中的持久性尚不清楚.
- 假设与像Acanthamoeba这样的环境虫的相互作用有助于C. jejuni的生存和宿主-病原体的原始化.
- 阿米巴在微生物生态系统中至关重要,影响各种细菌物种的种群,包括病原体.
研究的目的:
- 研究Campylobacter jejuni和Acanthamoeba之间相互作用的分子机制.
- 为了分析Acanthamoeba castellanii在感染C. jejuni.后的转录组反应.
- 确定参与宿主细胞操纵和生存的细菌因素.
主要方法:
- 对感染Campylobacter jejuni 11168H.的Acanthamoeba castellanii的整个转录组分析.
- 高分辨率显微镜可视化细菌与宿主细胞的关联.
- 一种新型细菌内核酶 (CjeN) 的表征及其对宿主DNA的影响.
主要成果:
- C. jejuni感染引发了A. castellanii基因表达的显著变化,包括DNA修复和蛋白质合成途径的上调.
- 在A. castellanii下调的基因与离子运输和透应激有关.
- 鉴定出一种新的C. jejuni内核酶 (CjeN),诱导宿主DNA损伤,观察到细菌与宿主线粒体之间的关联,以及改变宿主代谢有利于乳酸盐的产生.
结论:
- 阿坎萨莫巴的Campylobacter jejuni感染会触发特定的宿主细胞反应,并涉及诸如CjeN.这样的细菌因素.
- 这种相互作用会导致宿主DNA受损,改变宿主细胞代谢 (Warburg-like),以及C. jejuni.可能利用宿主衍生乳酸.
- 这项研究揭示了一个意想不到的宿主-病原体相互作用模型,为了解C. jejuni环境持久性和病原体产生提供了新的途径.
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