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设计的α-sheet会破坏尿病原菌大肠杆菌生物膜,使细菌对抗生素和免疫细胞敏感
Alissa Bleem1, Tatum Prosswimmer2, Ruying Chen1,3
1Department of Bioengineering, University of Washington, Seattle, WA, 98195, USA.
Scientific reports
|June 7, 2023
概括
这项研究揭示了针对α-sheet结构的合成可以抑制尿病原性大肠杆菌生物膜中的curli amyloid纤维的形成,为抗击感染提供了一种新的非抗生素方法.
科学领域:
- 微生物学 微生物学
- 生物化学 生物化学
- 传染性疾病 传染性疾病
背景情况:
- 泌尿病原性大肠杆菌 (UPEC) 是美国医院感染的主要原因.
- 由UPEC造成的生物膜形成使抗生素治疗复杂化,并增加医疗保健成本.
- 库里粉样纤维是UPEC生物膜的关键结构组成部分,但它们的组装机制尚未完全理解.
研究的目的:
- 为了研究alpha-sheet二次结构在curli粉样纤维的体内组合中的作用.
- 开发和测试合成α片作为一种非抗生素策略,以抑制卷曲形成和对抗UPEC感染.
主要方法:
- 在聚合过程中,CsgA主要的curli成分的生物物理特征.
- 在体外聚合试验中使用合成α片.
- 在UPEC生物膜中抑制曲线纤维的形成.
- 对生物膜分散和细菌对抗生素敏感性的评估.
- 细胞细胞对细菌清除的评估.
主要成果:
- 在可溶性,前纤维细胞CsgA物种中确认了α-sheet结构的存在.
- 合成的α片抑制了CsgA在体外的聚合和生物膜中的状纤维的形成.
- 的应用增强了生物膜居民细菌的抗生素敏感性.
- 观察到生物膜的分散,从而改善了细胞的细胞吸收.
结论:
- 在UPEC中,alpha-sheet结构对于curli-amyloid纤维的组装至关重要.
- 合成的α片是一种有前途的非抗生素治疗策略.
- 这种方法可以减少生物膜的形成,增加抗生素的疗效,并增强细菌清除.
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