Modulation of a Circulating Uremic Solute via Rational Genetic Manipulation of the Gut Microbiota.

Modulation of a Circulating Uremic Solute via Rational Genetic Manipulation of the Gut Microbiota.
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DOI:
10.1016/j.chom.2016.10.021
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发表时间:
2016-12-14
影响因子:
30.3
通讯作者:
Fischbach MA
Fischbach MA
中科院分区:
医学1区
文献类型:
--
作者:
Devlin AS;Marcobal A;Dodd D;Nayfach S;Plummer N;Meyer T;Pollard KS;Sonnenburg JL;Fischbach MA

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肾脏疾病的患病率正在增长,并且与代谢和心血管疾病有显著的共病性。硫酸吲哚酚(IS)是一种毒素,当肾功能下降时会在血浆中蓄积,并导致慢性肾脏疾病的进展。IS完全来自肠道微生物群。细菌色氨酸酶将色氨酸转化为吲哚,吲哚被宿主吸收和修饰以产生IS。在这里,我们鉴定了肠道共生拟杆菌中广泛分布的色氨酸酶家族,并发现删除该基因可以消除体外吲哚的产生。通过改变拟杆菌属大肠杆菌酶的状态或丰度,我们可以调节异生菌小鼠和常规小鼠肠道群落背景中的IS水平。我们的结果表明,可以通过针对微生物群来控制宿主IS水平,并提出了治疗肾脏疾病的可能策略。
Renal disease is growing in prevalence and has striking co-morbidities with metabolic and cardiovascular disease. Indoxyl sulfate (IS) is a toxin that accumulates in plasma when the kidney function declines and contributes to the progression of chronic kidney disease. IS derives exclusively from the gut microbiota. Bacterial tryptophanases convert tryptophan to indole, which is absorbed and modified by the host to produce IS. Here, we identify a widely distributed family of tryptophanases in the gut commensal Bacteroides and find that deleting this gene eliminates the production of indole in vitro. By altering the status or abundance of the Bacteroides tryptophanase, we can modulate IS levels in gnotobiotic mice and in the background of a conventional murine gut community. Our results demonstrate that it is possible to control host IS levels by targeting the microbiota and suggest a possible strategy for treating renal disease.
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