产生抗生素的细菌会影响微生物群的弹性和殖民抵抗力
Cody G Cole1, Zhenrun J Zhang1, Shravan R Dommaraju2
1Duchossois Family Institute, University of Chicago, 900 E 57th St, Chicago, IL 60637, USA; Committee on Microbiology, Biological Sciences Division, University of Chicago, 920 E 58th St, Chicago, IL 60637, USA.
Cell host & microbe
|December 2, 2025
概括
某些肠道细菌会产生兰西生物,以保护它们的领土. 然而,这些化合物破坏了微生物群,在使用抗生素后降低了对像Clostridioides difficile这样的感染的抵抗力.
科学领域:
- 微生物组研究的研究.
- 对细菌素的研究.
- 肠道微生物生态学
背景情况:
- 结合性细菌产生细菌素,就像兰西生物,以争夺肠道中的利基.
- 抗生素对病原体具有抗微生物活性,这表明抗生素耐药性感染的治疗潜力.
- 产生兰氏微生物的细菌对整体肠道微生物组合和功能的具体影响尚不清楚.
研究的目的:
- 为了研究肠道微生物群中产生兰地生物的细菌物种的数量和影响.
- 确定生产兰氏菌的细菌对抗生素治疗后微生物群弹性和易受感染的影响.
主要方法:
- 对编码兰氏基因的细菌物种与住院患者中缺乏这些基因的细菌物种进行比较分析.
- 在小鼠模型中使用Blautia pseudococcoides SCSK (BpSCSK).
- 在抗生素治疗后评估肠道再殖民,便微生物群衍生代谢物和对特定病原体 (Klebsiella pneumoniae,Clostridioides difficile) 的殖民抵抗力.
主要成果:
- 患有兰氏基因的细菌物种在住院患者中比缺乏兰氏的菌株更为丰富.
- 在小鼠中给予BpSCSK后,在抗生素诱导的抗生素失调后,预防了同类物种的重新定居.
- BpSCSK显著降低了便微生物群衍生代谢物,并导致对Klebsiella pneumoniae和Clostridioides difficile的殖民抵抗持续丧失.
结论:
- 产生抗菌素的细菌可能会对微生物群的弹性产生负面影响.
- 在暴露于抗生素后,抗生素介导的抗生素损害了肠道对机会性病原体的防御能力.
- 了解生产兰氏菌的细菌对于管理微生物群的健康和感染易感性至关重要.
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