开始性大肠杆菌双组件系统Cpx的动态反应有助于C. elegans的发展
Huiyang Xiong1,2, Beilei Hua3, Huanhu Zhu4
1School of Life Science and Technology, ShanghaiTech University, Shanghai, 201210, China. xionghuiyang@saas.sh.cn.
BMC biology
|February 3, 2026
概括
缺乏cpxR基因的大肠杆菌通过激活线粒体展开的蛋白质反应,延迟了Caenorhabditis elegans的发展. 细菌代谢和环境因素动态调节这种宿主微生物相互作用.
科学领域:
- 微生物学 微生物学
- 发展生物学 发展生物学
- 主体与微生物的相互作用
背景情况:
- 凯诺哈比迪斯-埃舍里希亚大肠杆菌模型系统允许对宿主-微生物相互作用进行单基因分析.
- 删除大肠杆菌cpxR,一个对外应激反应的调节者,被发现延迟了C. elegans的发展.
研究的目的:
- 调查大肠杆菌cpxR影响C. elegans发育的机制.
- 探索细菌代谢和环境因素在宿主微生物相互作用中的作用.
主要方法:
- 查大肠杆菌突变菌对C. elegans发育的影响.
- 对宿主线粒体展开蛋白质反应通路激活的分析.
- 在不同的介质中培养大肠杆菌 (LB与M9),以评估代谢影响.
- 研究N-乙半氨酸对C. elegans表型的影响.
主要成果:
- 大肠杆菌 ΔcpxR诱导了C. elegans发育延迟,并通过活性氧物种激活了线粒体展开的蛋白质反应.
- 在LB介质中培养大肠杆菌DcpxR,但不是M9,导致发育延迟,而L-histidine代谢是关键因素.
- 大肠杆菌Cpx系统的动态反应,而不是它的激活,影响了C. elegans的发育.
- N-乙半氨酸治疗将C. elegans表型从发育延迟转变为生存抵抗,表明宿主压力耐受性得到改善.
结论:
- 环境因素调节大肠杆菌在C. elegans中的Cpx反应.
- 这些发现为在不同环境中观察到的格拉姆阴性细菌中Cpx介导的病毒性变量提供了洞察力.
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