BMC Gastroenterology: 结肠微生物群在溃疡性结肠炎发病机制中的作用

2019-02-23 不详 MedSci原创

最近有研究发现,肠道微生物群与UC的发病密切相关。目前,关于肠道微生物群的研究主要包括从肠腔收集的样本。然而,管腔菌群只是肠道微生物群的一部分,目前还缺乏对病理条件下粘膜菌群变化的研究。在这项研究中,研究人员调查了UC的发病与不同肠层的菌群变化之间的相关性。

背景
最近有研究发现,肠道微生物群与UC的发病密切相关。目前,关于肠道微生物群的研究主要包括从肠腔收集的样本。然而,管腔菌群只是肠道微生物群的一部分,目前还缺乏对病理条件下粘膜菌群变化的研究。在这项研究中,研究人员调查了UC的发病与不同肠层的菌群变化之间的相关性。

方法
研究人员通过将小鼠暴露于DSS来建立硫酸葡聚糖钠(DSS)诱导的UC模型。在无菌条件下收获管腔内容物,包括内部粘液层和外部粘液层。然后使用16S rRNA V3 + V4扩增子的高通量测序分析样品。使用MetaStat,LefSe,多变量方差分析和空间统计分析和比较结肠微生物群组成和多样性。

结果
在对照组和UC模型组中,来自腔内容物,外部粘液层和内部粘液层的微生物群的多样性显着不同。统计学上不同的OTU属于Lachnospiraceae和Ruminococcaceae科,梭菌属主要定位于外部粘液层。

结论
菌群多样性的变化主要发生在结肠外粘液层。结肠粘液层菌群的变化对于了解IBD肠道菌群的共同特征以及肠道菌群与疾病进展之间关系的理解具有重要意义。

原始出处:
Ling-yan Pei. Et al. Role of colonic microbiota in the pathogenesis of ulcerative colitis. BMC Gastroenterology.2019.

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    2019-03-23 nymo
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    2019-05-14 许安
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