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纤维溶解剂缺陷使宿主易患有导管相关性尿路感染引起的败血症
Jonathan J Molina1,2, Kurt N Kohler2, Christopher Gager2
1Integrated Biomedical Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA.
Nature communications
|March 28, 2024
概括
患有纤维解质缺乏症的患者容易发生严重的导管相关性尿路感染 (CAUTIs) 和败血症. 在CAUTI期间,Enterococcus faecalis利用纤维素形成生物膜.
科学领域:
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 传染性疾病 传染性疾病
- 微生物学 微生物学
- 病原发生和发病.
背景情况:
- 导管相关的尿路感染 (CAUTIs) 是常见的,难以治疗的医院感染.
- CAUTIs可能导致严重的并发症,如血液感染和死亡.
- 病原体利用宿主纤维素在膀中的沉积有助于CAUTI的严重程度.
研究的目的:
- 调查宿主纤维分析能力在CAUTI发展和严重性中的作用.
- 确定CAUTI病原体,如Enterococcus faecalis,利用纤维素的机制.
- 了解严重CAUTI和相关的败血症的风险因素.
主要方法:
- 使用了与导管相关的尿路感染的小鼠模型.
- 在具有遗传或获得的纤维解质缺陷的小鼠中评估CAUTI和败血症严重程度.
- 研究了Enterococcus faecalis分泌蛋白酶SpreE在纤维素积累和生物膜形成中的作用.
主要成果:
- 宿主纤维解质缺乏症会导致严重的CAUTI和各种尿病原体的败血症.
- 导管膀中的纤维素沉积作为病原体生物膜形成的平台.
- Enterococcus faecalis利用SpreE蛋白酶促进纤维素的积累,支持其生长和持久性.
结论:
- 主体纤维溶解能力是决定CAUTI严重程度和败血症风险的关键因素.
- Enterococcus faecalis通过诱导纤维素沉积以形成位来积极操纵宿主环境.
- 向纤维素积累或细菌蛋白酶可能为CAUTI提供新的治疗策略.
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