一项关于肠道微生物组组成和小肠移植中临床感染的元基因学前性队列研究
Archana Madhav1, Rachel Bousfield1,2, Joana Pereira-Dias1
1Cambridge Institute of Therapeutic Immunology and Infectious Disease, Department of Medicine, University of Cambridge, Cambridge, UK.
Gut microbes
|March 5, 2024
概括
小肠移植接受者经常患有肠道细菌感染. 肠道微生物组分析可以预测这些感染,有助于对移植患者的早期检测和预防策略.
科学领域:
- 胃肠病学 胃肠病学
- 移植医学 移植医学
- 微生物组研究 微生物组研究
背景情况:
- 小肠移植 (SBT) 接受者有高的细菌病发病率 (三分之二),大多数感染发生在移植后3个月内.
- 在SBT患者中的败血症,通常源于肠道细菌在移植物中转移,导致显著的死亡率 (31%).
- 了解肠道微生物组的作用对于预测和预防SBT后感染至关重要.
研究的目的:
- 为了研究体和结肠微生物群的组成是否可以预测SBT接受者的后续临床感染的出现和类型.
- 在小肠移植后的肠源性败血症的背景下,探索病原体转移假说.
主要方法:
- 全元基因组测序 (WMS) 在5名SBT参与者的40个肠道排泄物样本上进行,这些样本是从移植到SBT后3个月内连续收集的.
- 分析了微生物组的组成,并与临床感染情节进行了比较.
- 通过监视内镜收集了乳房和结肠样本.
主要成果:
- 微生物组组成在每位参与者的内皮和结肠样本之间以及各个时间点之间是一致的.
- 五分之四的参与者经历了临床上显著的肠道感染.
- 在3/5的患者中观察到细菌转位,病原体在侵入性感染前1-10天殖民肠道;在捐赠体移植中,较高的α多样性与更好的结果相关;抗菌素耐药性基因增加与更长的住院时间有关.
结论:
- 初步证据支持SBT患者肠道源性败血症的病原体转移假说.
- 体和结肠微生物组分析显示了一致性,表明便甲基因组学可以作为监测工具.
- 监测肠道微生物群可能有助于阻碍移植受体感染特定的肠道病原体.
相关概念视频
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The normal gut flora of the colon plays a critical role in generating essential vitamins such as vitamins K, B5, and B7.
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