鞭毛干扰生物膜中的等离子体吸收:一个联合实验和建模研究
Henriette Lyng Røder1,2, Eleni Christidi3, Cristina I Amador2
1Department of Food Science, University of Copenhagen, Copenhagen, Denmark.
Applied and environmental microbiology
|December 14, 2023
概括
缺少鞭毛增强了细菌生物膜中的等离子体吸收,促进了水平基因转移 (HGT). 这一发现对于了解抗生素耐药性的传播和制定新的抗生素耐药性策略至关重要.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 通过等离子体进行的水平基因转移 (HGT) 推动了细菌的进化和抗生素耐药性的传播.
- 与浮游生物细胞相比,生物膜中的细菌表现出改变的表型,但生物膜中的HGT机制尚未完全理解.
- 了解生物膜中的等离子体转移对于控制抗生素耐药性至关重要.
研究的目的:
- 研究生物膜适应对*Xanthomonas retroflexus* (XRw) 中等离子体转移的影响.
- 为了确定影响XRw生物膜中等离子体吸收的因素.
- 阐明鞭毛在生物膜中的细菌结合中的作用.
主要方法:
- 野生类型 (WT) 和生物膜适应突变体 (XRw) *X. retroflexus*中的等离子体吸收的比较分析.
- 蛋白质组分析以确定WT和XRw之间的蛋白质表达的差异.
- 在WT和XRw菌株中创建非鞭毛突变 (*fliM*) 的基因操纵.
- 实验验证和基于个体的建模,以测试鞭毛影响的拟议机制.
主要成果:
- 与WT生物膜相比,XRw生物膜对IncP-1ε等离子体pKJK5的吸收显著更高.
- 蛋白质组学揭示了XRw中鞭毛蛋白的水平降低,与增加的等离子体吸收相关.
- 无论是WT和XRw的非鞭毛突变 (*fliM*) 都显示出增强的等离子体吸收,证实了鞭毛的抑制作用.
- 这项研究确定了鞭毛体的硬质障碍作为一种可行的机制,可以减少柱体介导的等离子体转移.
结论:
- 旗在调节细菌生物膜中的等离子体结合中起着重要而复杂的作用.
- 鞭毛体的缺失或活动减少可以增强生物膜中的等离子体吸收和HGT.
- 这些发现为生物膜中HGT动态提供了新的见解,并对控制抗生素耐药性传播产生了影响.
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