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基于多组学方法的Enterococcus faecium的表征:基因组,转录组和表型分析
Jiayan Huang1, Haoyu Fan1, Yurui Wang1
1College of Animal Science, Xizang Agricultural and Animal Husbandry University, Linzhi 860000, China.
Veterinary sciences
|January 28, 2026
概括
雅克便中含有与人类临床分离物密切相关的Enterococcus faecium菌株,构成公共卫生风险. 这种来自动物的病原体表现出抗微生物耐药性和毒性,在小鼠中引起肠道炎症和损伤.
科学领域:
- 微生物学 微生物学
- 基因组学就是基因组学.
- 免疫学 免疫学 免疫学
背景情况:
- 来自动物的Enterococcus faecium (E. faecium) 是由于抗菌素耐药性 (AMR) 和毒性基因而引起的公共卫生问题.
- 来自青海-西藏高原等独特环境的E. faecium的致病性和交叉宿主传播情况尚不清楚.
研究的目的:
- 为了研究从雅克便中分离出来的E. faecium菌株的遗传构成,致病性和宿主反应.
- 评估与来自独特地理来源的动物衍生的E. faecium相关的公共卫生风险.
主要方法:
- 全基因组测序用于遗传学分析和AMR和病毒性基因的识别.
- 抗微生物敏感性测试.
- 在体内小鼠感染模型用于病原性评估和宿主肠道组织的转录组分析.
主要成果:
- 来自雅克的E. faecium菌株在遗传学上接近人类临床分离物,这表明交叉宿主传播潜力.
- 该菌株具有AMR基因 (例如AAC(6"> -Ii,msrC,eatAv) 和病毒性基因 (例如bopD,Acm,ClpP),对多种抗生素具有耐药性.
- 感染诱导了小鼠肠道的炎症损伤,包括上皮细胞亡,血管拥堵和免疫细胞透.
- 转录组学揭示了一个"识别-响应-损伤"信号轴,涉及Toll-like/NOD-like受体,NF-κB/MAPK通路和化学激素信号.
结论:
- 来自雅克的E. faecium菌株可能具有AMR和毒性因子,构成潜在的公共卫生风险.
- 该研究阐明了从遗传决定因素到宿主反应的致病机制,为目标干预策略提供了信息.
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