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相关概念视频

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Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...
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Cefoperazone-treated Mouse Model of Clinically-relevant Clostridium difficile Strain R20291
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在Clostridioides difficile中,Enterococcus faecalis调节了阶段变化.

Ashley S Weiss1,2, Jilarie A Santos-Santiago3, Orlaith Keenan1,2

  • 1Division of Protective Immunity, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.

Journal of bacteriology
|December 23, 2025
PubMed
概括
此摘要是机器生成的。

Enterococcus faecalis影响了Clostridioides difficile的阶段变化,改变了其种群异质性. 这种相互作用影响了C. difficile的表型,突出了多微生物环境在病原体适应和持久性方面的作用.

关键词:
殖民地形态学殖民地形态学阶段变化的相位变化.多种微生物的相互作用.表面运动率 表面运动率

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科学领域:

  • 微生物学 微生物学
  • 病原体与宿主相互作用
  • 微生物生态学 微生物生态学

背景情况:

  • 肠道病原体,如Clostridioides difficile使用相位变化进行适应.
  • 肠道微生物群对病原体异质性的影响还没有得到充分研究.
  • 菌 (Enterococcus faecalis) 与C. difficile一起感染肠道.

研究的目的:

  • 为了调查Enterococcus faecalis如何影响Clostridioides difficile的阶段变化.
  • 探索多微生物相互作用对C. difficile种群异质性的影响.

主要方法:

  • 在固体介质上共同培养E. faecalis和C. difficile.
  • 观察C. difficile殖民地形态和细胞特征的变化.
  • 分析CmrRST信号传导系统在表型变化中的作用.

主要成果:

  • E. faecalis显著改变了与CmrRST相变相关的C. difficile表型.
  • 在C. difficile中,E. faecalis促进了切换到"cmr-ON"状态,导致细胞链和粗的殖民地.
  • 这种影响是特定于E. faecalis,其他测试的细菌没有显示类似的影响.

结论:

  • 多微生物环境,特别是E. faecalis的存在,极大地影响了C. difficile种群的异质性.
  • 微生物生态和相互作用在塑造病原体表型变异方面发挥着复杂的作用.
  • 了解这些相互作用可能会揭示C. difficile感染的新治疗点.