Sci Transl Med:揭秘维持肠道平衡的关键酶

2017-11-16 Juka 心湖 转化医学网

肠道微生物组的不平衡,即“坏”的微生物多于“好”的被称为生态失调,这是由肠道炎症,抗生素或饮食等环境压力造成的。肠道生态失调可以加重克罗恩病和其他疾病,但这种关系背后的机制并没有被完全解释清楚,在这项研究中研究人员希望为患者提供更健康的细菌平衡。

肠道微生物组的不平衡,即“坏”的微生物多于“好”的被称为生态失调,这是由肠道炎症,抗生素或饮食等环境压力造成的。肠道生态失调可以加重克罗恩病和其他疾病,但这种关系背后的机制并没有被完全解释清楚,在这项研究中研究人员希望为患者提供更健康的细菌平衡。

研究人员在一系列人类和小鼠的研究中发现,一种称为Proteobacteria的“坏”细菌以尿素为食,这种废弃的产物可能最终回到肠道,在产生肠道疾病中起了重要的作用。含有尿素酶的“坏”细菌将尿素转化成氨(氮代谢),然后被细菌重吸收以制造与克罗恩病中的生态失调有关的氨基酸。“好的”细菌可能不会以类似的方式进行代谢。这也暗示着一种潜在的治疗方法,可以尝试将微生物组设计成更健康的平衡状态进而治疗疾病。

消灭肠道微生物中的大部分细菌,然后再引入某种缺乏脲酶的“好”细菌,也许会成为更好地治疗克罗恩病的有效方法。

该研究的资深作者,Gary D. Wu说:这项研究具有很重要的意义,它表明,氮气进入细菌是发展肠道生态失调的重要过程。这也证明使用一种酶可以重新配置肠道微生物群组成。”

原始出处:

Josephine Ni,et al.,A role for bacterial urease in gut dysbiosis and Crohn’s disease.Sci Transl Med.15 Nov 2017:Vol. 9, Issue 416, eaah6888.

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    2018-06-24 bsmagic9140
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    2017-11-16 1ddf0692m34(暂无匿称)

    学习了.涨知识

    0

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    2017-11-16 清风拂面

    谢谢分享.学习了

    0