深度纵向下呼吸道微生物组分析揭示了危急疾病中基因组解析的功能和进化动态
Minghui Cheng1,2, Yingjie Xu3, Xiao Cui4
1MOE Key Laboratory of Biosystems Homeostasis & Protection, and Zhejiang Provincial Key Laboratory of Cancer Molecular Cell Biology, Life Sciences Institute, Zhejiang University, Hangzhou, Zhejiang, 310030, China.
Nature communications
|September 27, 2024
概括
一种新方法丰富了低生物质的呼吸道样本,使得重症患者下呼吸道 (LRT) 微生物组的深度基因组分析成为可能. 这揭示了重症监护室 (ICU) 中的病原体动态和传播模式.
科学领域:
- 微生物组研究 微生物组研究
- 基因组学就是基因组学.
- 关键护理医学 关键护理医学
背景情况:
- 下呼吸道 (LRT) 微生物群对健康至关重要,特别是在危急病患者中.
- 鉴定LRT微生物群的特征是困难的,因为微生物生物量很低,宿主DNA受到污染.
研究的目的:
- 开发一种方法,对低生物质LRT样本进行深度元基因组分析.
- 描述在重症监护室 (ICU) 患者中LRT微生物群的基因组解析功能,传播和进化格局.
主要方法:
- 基于Chelex100的低生物质微生物丰富方法 (CMEM) 的开发.
- 在三家医院中,CMEM应用于来自157名ICU患者的453个纵向LRT样本.
- 120个高质量的元基因组组装基因组 (MAG) 和相关的等离子体的恢复,无需培养.
主要成果:
- 在肺炎患者中识别不同纵向微生物组动态和医院特定的机会性病原体和抗体.
- 肺炎诊断和ICU停留时间与特定抗生素耐药性基因 (ARG) 的关联.
- 通过基于MAG的分析揭示了菌株特异性抵抗体和病毒体,以及对移动体和等离子体的进化见解.
结论:
- CMEM是一种强大的工具,用于对低生物质样本进行基因组解析分析.
- 该研究提供了重症患者中LRT微生物群的全面景观,包括功能,传播和进化方面.
- 这些发现突出了ICU内频繁的患者间菌株传播的潜力.
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