细菌性便秘:粘真菌降解肠道共生细菌导致便秘
Tomonari Hamaguchi1, Noriaki Gibo1,2,3, Misuzu Ohara1,4
1Division of Neurogenetics, Center for Neurological Diseases and Cancer, Nagoya University Graduate School of Medicine, Nagoya, Japan.
Gut microbes
|February 19, 2026
概括
两种肠道细菌,Akkermansia muciniphila和Bacteroides thetaiotaomicron,通过降解便粘膜合作引起便秘. 准它们的硫酶活性可以治疗这种常见的胃肠道疾病.
科学领域:
- 胃肠病学 胃肠病学
- 微生物学 微生物学
- 微生物组研究 微生物组研究
背景情况:
- 便秘是一种普遍的胃肠道疾病,微生物的贡献不明.
- 特定的肠道共生物,Akkermansia muciniphila和Bacteroides thetaiotaomicron,都与便秘的病原性有关.
研究的目的:
- 阐明A. muciniphila和B. thetaiotaomicron在便秘中的机械作用.
- 研究这些细菌在诱导便秘方面的合作相互作用.
- 为了确定细菌便秘的潜在治疗点.
主要方法:
- 在便秘患者 (帕金森病和慢性异常性便秘) 和健康对照人群中对肠道微生物群的比较分析.
- 用单个或组合细菌菌株殖民的Gnotobiotic小鼠模型.
- 产生一种无氧硫酶成熟酶 (anSME) 缺乏的B. thetaiotaomicron突变的基因.
- 对便粘素组成和基因表达的分析.
主要成果:
- 在便秘患者中发现A. muciniphila和B. thetaiotaomicron的丰富性增加.
- 在 gnotobiotic 小鼠中,与这两种细菌的共同殖民引起便秘,而单一殖民并没有.
- 一种缺乏anSME的B. thetaiotaomicron菌株在共同殖民的小鼠中改善了便秘,这表明了酸硫酸的代谢作用.
- 便粘膜的细菌降解减少了滑,导致便脱水.
结论:
- A. muciniphila和B. thetaiotaomicron通过粘素降解合作诱导便秘.
- 细菌性便秘涉及硫酶和葡萄糖酶活动对结肠粘膜的协同作用.
- 向微生物硫酶活性是对细菌便秘的有希望的治疗策略.
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