在III型分泌系统表达过程中,Yersinia pseudotuberculosis的生长停止与改变的核糖体蛋白表达和降低的 gentamicin 敏感性有关
Justin Greene1, Katherine L Cotten1, Rhett A Snyder1
1W. Harry Feinstone Department of Molecular Microbiology and Immunology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, United States of America.
PLoS pathogens
|July 7, 2025
概括
耶尔西尼亚的III型分泌系统 (T3SS) 的表达导致生长停止和抗生素耐受性. 抗生素治疗后幸存的细菌表现出较低的核糖体蛋白S10表达,表明明显的生长状态.
科学领域:
- 微生物学 微生物学
- 细菌病原体的产生
- 分子生物学分子生物学
背景情况:
- 耶尔西尼亚III型分泌系统 (T3SS) 的表达与培养中的细菌生长停止有关.
- 了解T3SS和细菌生长状态之间的关系对于破译病原和治疗策略至关重要.
研究的目的:
- 调查T3SS表达是否足以诱导指数级相标记物的损失.
- 在Yersinia pseudotuberculosis感染期间,在体外和体内分析细菌生长状态和标记物表达.
主要方法:
- 使用光转录记者 (rpsJ/S10促销器融合到不稳定的gfp) 来监测核糖体蛋白S10的表达.
- 采用了一种系统性Y. pseudotuberculosis感染的小鼠模型来观察脏中的细菌种群.
- 使用滴滴式微流体来模拟模拟组织环境中的集群细菌生长.
主要成果:
- 在介质中的T3SS诱导导致生长抑制和减少S10表达,但一些细胞保持了两者的高表达.
- 在体内,不同的细菌亚群显示高T3SS/低S10或高T3SS/高S10表达.
- 微流体的集群增长允许高T3SS表达而不影响S10水平.
- T3SS表达增强了抗生素耐受性,幸存的细菌表现出低S10表达.
结论:
- 在Yersinia中,T3SS表达可以诱导生长停止并促进抗生素耐受性.
- 抗生素治疗选择低S10表达的细菌,这表明一种特定的生存机制.
- 细菌生长状态,受T3SS和环境环境 (浮游生物与集群) 的影响,影响抗生素易感性.
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