Dysbiosis-Induced Secondary Bile Acid Deficiency Promotes Intestinal Inflammation.

Dysbiosis-Induced Secondary Bile Acid Deficiency Promotes Intestinal Inflammation.
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DOI:
10.1016/j.chom.2020.01.021
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发表时间:
2020-04-08
影响因子:
30.3
通讯作者:
Habtezion A
Habtezion A
中科院分区:
医学1区
文献类型:
--
作者:
Sinha SR;Haileselassie Y;Nguyen LP;Tropini C;Wang M;Becker LS;Sim D;Jarr K;Spear ET;Singh G;Namkoong H;Bittinger K;Fischbach MA;Sonnenburg JL;Habtezion A

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次级胆汁酸(SBAs)是由初级胆汁酸(PBAs)在一个依赖于少数微生物拥有的生物合成能力的过程中衍生出来的。为了评估BAs在肠道炎症中的作用,我们对结肠切除术治疗的溃疡性结肠炎(UC)患者与对照组(家族性腺瘤性息肉病,FAP)的回肠袋(手术产生的储物库)粪便进行了代谢组学、微生物组学、宏基因组学和转录组学分析。我们发现,相对于FAP, UC袋中的石胆酸和去氧胆酸(通常是最丰富的肠道SBAs)、将PBAs转化为SBAs所需的基因和瘤胃球菌科(已知的少数几种包括sba产生细菌的分类群之一)的水平降低。在三种小鼠结肠炎模型中,补充SBA可减轻肠道炎症。这种抗炎作用部分依赖于胆汁酸受体TGR5。这些数据表明,在炎症易发的UC患者中,生态失调会导致SBA缺乏,从而促进肠道内的促炎状态,这可能通过SBA恢复来治疗。次级胆汁酸(SBAs)是一些最浓缩的细菌来源的肠道代谢物。Sinha等人发现,与fap对照组患者相比,UC眼袋患者的SBAs和瘤胃球菌科(少数产生sba的分类群之一)减少。在结肠炎模型中,SBAs在依赖于TGR5胆汁酸受体的过程中改善疾病。
Secondary bile acids (SBAs) are derived from primary bile acids (PBAs) in a process reliant on biosynthetic capabilities possessed by few microbes. To evaluate the role of BAs in intestinal inflammation, we performed metabolomic, microbiome, metagenomic, and transcriptomic profiling of stool from ileal pouches (surgically created resevoirs) in colectomy-treated patients with ulcerative colitis (UC) versus controls (familial adenomatous polyposis, FAP). We show relative to FAP, UC pouches have reduced levels of lithocholic acid and deoxycholic acid (normally the most abundant gut SBAs), genes required to convert PBAs to SBAs, and Ruminococcaceae (one of few taxa known to include SBA-producing bacteria). In three murine colitis models, SBA supplementation reduces intestinal inflammation. This anti-inflammatory effect is in part dependent on the TGR5 bile acid receptor. These data suggest that dysbiosis induces SBA deficiency in inflammatory-prone UC patients, which promotes a pro-inflammatory state within the intestine that may be treated by SBA restoration. Secondary bile acids (SBAs) are some of the most concentrated bacterially-derived gut metabolites. Sinha et al. find UC pouch patients have reduced SBAs and Ruminococcaceae (one of few SBA-producing taxa) compared to FAP-control patients. In colitis models, SBAs ameliorate disease in a process reliant on the TGR5 bile acid receptor.
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