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一个核心的人类肠道微生物Mediterraneibacter gnavus产生一种广谱细菌 mediterrocincin
Gabrielle Mingolelli1, Jessia Raherisoanjato1, Duong Trinh1
1Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois Chicago, Chicago, Illinois, USA.
mBio
|July 17, 2025
概括
研究人员发现了mediterrocin,这是一种由肠道微生物Mediterraneibacter gnavus.vus产生的新型细菌素. 这种化合物抑制各种肠道细菌,包括与疾病相关的M. gnavus菌株,为微生物群稳定性和疾病提供了洞察力.
科学领域:
- 微生物学 微生物学
- 人类肠道微生物组研究研究
- 细菌素的发现
背景情况:
- 稳定的肠道微生物群对人类健康至关重要,但调节其结构的因素尚不清楚.
- 地中海菌 (Mediterraneibacter gnavus) (前名Ruminococcus gnavus) 是一种主要的肠道微生物,与各种疾病有关.
- 微生物竞争是影响肠道社区结构和过渡到失生症的关键因素.
研究的目的:
- 发现由M. gnavus.产生的新型抗菌化合物.
- 研究M. gnavus在肠道内的微生物竞争中的作用.
- 确定M. gnavus相互作用背后的分子机制及其与疾病状态的联系.
主要方法:
- 对抗微生物活性临床M. gnavus分离物的查.
- 以生物活性为指导的分化和质谱法用于化合物隔离和鉴定.
- 基因干扰以确认已识别的细菌的生物合成途径.
- 测试mediterrocin对各种细菌菌株的抑制活性,包括M. gnavus分离物和病原体.
主要成果:
- 发现和分离了89个氨基酸细菌素的地中海素,这种细菌素是由M. gnavus生产的.
- 梅特罗辛对多种M. gnavus菌株表现出广泛的抗菌活性,在炎症性肠病患者的隔离物中敏感性更高.
- 地中海素生物合成基因集群在Bacillota.中广泛分布.
- 梅德罗辛还抑制了其他Lachnospiraceae和病原体Morganella morganii.
结论:
- 梅德罗辛是一种新型细菌素,由核心肠道共生物M. gnavus.产生.
- 这种细菌素在肠道微生物群内的细菌间竞争中发挥作用.
- 梅德罗辛对与疾病相关的菌株和病原体的活性表明它可能参与维持肠道健康以及它在失能症中的改变作用.
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