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在Clostridioides difficile中发现一种广泛的聚胺-低分子量-醇混合途径

Rachelle L Hunt^1,2,3, Joonseok Oh^2,3, Abhishek Jain⁴

¹Department of Microbial Pathogenesis, Yale School of Medicine, New Haven, Connecticut 06510, United States.

ACS infectious diseases

|July 17, 2025

概括

科学家们发现了新型的密闭二醇 (CSHs),它们是由聚氨酸和N-乙半氨酸制成的混合分子. 这些CSH存在于肠道微生物群中,它们的丰富程度与结直肠癌风险相关.

科学领域:

微生物学微生物学
代谢学代谢学代谢学
胃肠病学胃肠病学

背景情况:

克洛斯特里迪奥伊德困难感染导致胃肠道炎症,并增加结直肠癌的风险.
肠道微生物的聚胺代谢对平衡至关重要,但不完全理解.
现有的C. difficile代谢模型缺乏关于精氨酸等重要的多氨酸的细节.

研究的目的:

研究聚氨酸在C. difficile感染和肠道平衡中的作用.
来识别由肠道微生物从聚氨酸中产生的新型代谢物.
探索这些代谢物与结直肠癌的关联.

主要方法:

用同位素标记的多氨酸进行养研究.
分析人类微生物群的多样性收集.
对产生CSH的细菌 (Bacteroides uniformis) 的遗传查.
胃肠道粘膜活检的分析.

主要成果:

发现了克劳斯特里迪醇 (CSHs),来自多氨酸和N-乙半氨酸的混合分子.
在 Firmicutes 和 Bacteroidetes 类中广泛检测到 CSH.
保护的两个基因操作子的识别,负责CSH的生产.
在GI活检中,CSH丰富度与结直肠癌之间存在正相关性.

结论:

人的肠道微生物新陈代谢整合了聚胺和低分子量醇通路.
CSHs是新的,广泛分布的微生物代谢产物.
丰富的CSH与结直肠癌有关,这表明它在疾病发病过程中起着作用.

关键词:

克洛斯特里迪奥伊德斯困难菌细菌天然产品是一种细菌天然产品.肠道微生物的新陈代谢同位素标签的标签低分子量硫醇是一种低分子量硫醇.聚氨酸是多氨基的

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