病原性Bacteroides fragilis菌株可以从肠道居民的共生物中出现
Renee E Oles1,2, Marvic Carrillo Terrazas1, Luke R Loomis1
1Department of Pathology, University of California, San Diego, La Jolla, CA.
bioRxiv : the preprint server for biology
|July 1, 2024
概括
肠道细菌Bacteroides fragilis是一种常见的肠道细菌,可以既有益又有害. 基因组分析显示,基因交换和辅助基因组适应性推动了B. fragilis.病原性特征的出现.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 肠道微生物组研究研究
背景情况:
- 细菌菌 (Bacteroides fragilis) 是一个关键的人类肠道共存物,对恒温至关重要.
- B. fragilis可以从共生状态过渡到致病状态.
研究的目的:
- 调查B. fragilis双重开始性和致病性质的遗传基础.
- 确定B. fragilis.内病原菌株出现的基因组基础.
主要方法:
- 对813个B. fragilis菌株 (共生和致病性) 的比较基因组分析.
- 遗传学分析以确定不同的遗传群体.
- 微生物全基因组关联研究 (mGWAS) 以确定与毒性相关的基因.
主要成果:
- 致病性B. fragilis菌株来自不同的基因谱系.
- 快速的基因交换和辅助基因组可塑性有助于致病性.
- 确定了16个由特定基因组特征的基因组.
- 发现了44个与肠外生存和致病性相关的基因.
结论:
- 基因组多样性和水平基因转移促进了B. fragilis.病原性特征的出现.
- 了解B. fragilis的基因组进化为我们提供了关于微生物病原学的见解.
- 辅助基因组在适应共生细菌适应致病性生活方式方面发挥着关键作用.
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