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一个人类泌尿管微组织模型揭示了尿病原体和共生动物之间共同的殖民和生存策略
Carlos Flores1, Jefferson Ling1, Amanda Loh1
1Centre for Urological Biology, Division of Medicine, University College London, WC1E 6BT London, UK.
Science advances
|November 8, 2023
概括
尿路感染涉及各种细菌,包括常见的大肠杆菌,侵入人类泌尿管细胞. 宿主细胞根据细菌的毒性而有不同的反应,驱逐入侵者或启动炎症反应.
科学领域:
- 微生物学 微生物学
- 泌尿器科 泌尿器科 泌尿器科 泌尿器科
- 细胞生物学 细胞生物学
背景情况:
- 尿路感染 (UTI) 在全球范围内很常见.
- 当前的研究经常使用有限的细菌菌株和非人类模型.
- 了解人类尿路中的宿主-病原体相互作用至关重要.
研究的目的:
- 为了研究不同细菌物种在人类泌尿器微组织模型中的相互作用.
- 区分开始性和泌尿病原性细菌行为.
- 为了阐明微组织,细胞和分子层面的宿主反应.
主要方法:
- 使用了一个具有完全分层,差异化和尿液耐受性的人类泌尿管微组织模型.
- 评估了入侵,细胞内细菌社区的形成和宿主细胞的反应.
- 分析了细菌的生活方式,如丝状,链状和生物膜形成.
主要成果:
- 泌尿病原体和开始性大肠杆菌都入侵了泌尿管细胞,这表明入侵是一种共同的生存策略.
- 大肠杆菌粘附FimH对于细胞内细菌社区的形成至关重要,而不是入侵.
- 宿主细胞驱逐了细胞内细菌,并对细胞毒性/侵入性尿病原体与共生菌的反应有所差异,包括屏障破坏和细胞因子诱导.
结论:
- 细菌入侵是一种常见的策略,不仅限于毒性.
- 主体尿细胞采用驱逐和炎症反应等防御机制.
- 这项研究在与人类相关的模型中提供了对物种和菌株特异性尿路感染病原学的见解.
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