不同的应激反应决定了Listeria monocytogenes的物种内毒性异质性和宿主适应性
Lukas Hafner1, Enzo Gadin1, Lei Huang1
1Biology of Infection Unit, Institut Pasteur, Université Paris Cité, Inserm U1117, Paris, France.
Nature microbiology
|November 23, 2024
概括
在Listeria monocytogenes中,微生物毒性异质是由个体的应激反应驱动的,而不仅仅是毒性基因. 这种应激反应由SigB调节,并受到多种基因变异的影响,影响宿主适应.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 病变的发生和发病.
背景情况:
- 微生物病原发生依赖于毒性基因,但相同的基因含量可能导致不同的病原潜力.
- 这表明,除了基因含量之外,还有其他因素影响微生物毒性.
研究的目的:
- 在模型病原体Listeria monocytogenes中研究毒性异质的决定因素.
- 了解应激反应在微生物毒性和宿主适应中的作用.
主要方法:
- 许多Listeria monocytogenes分离物的比较基因组学和转录基因组学.
- 时间缩短显微镜,体外进化实验和体内研究.
- 分析压力反应调节器SigB及其路径.
主要成果:
- 单个应激反应力Listeria monocytogenes分离直接与它们的体内毒性水平相关.
- 由SigB调节器介导的差应激反应,解释了病毒性异质.
- SigB通路调整是多基因的,受多种罕见基因变异的影响.
结论:
- 应激反应能力,而不是辅助毒性基因含量,是种内毒性异质性的首要决定因素.
- 在Listeria monocytogenes中,宿主适应性体现在其应激反应程度上.
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