等离子体通过插入序列介导的基因失活促进抗微生物耐药性
Jorge Sastre-Dominguez1,2, Paloma Rodera-Fernandez1,2, Javier DelaFuente1
1Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Cientificas (CSIC), Madrid, Spain.
Nature microbiology
|March 14, 2026
概括
携带插入序列 (IS) 的等离子体通过不激活基因在细菌中加速抗微生物耐药性 (AMR). 这项研究揭示了等离子体不仅通过传播抗药性基因来促进AMR,而且还通过IS介导的基因破坏来促进AMR.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 等离子体是细菌群体中抗菌素耐药性 (AMR) 基因传播的关键驱动因素.
- 插入序列 (IS) 是可在基因组和等离子体内转移的移动遗传元素.
- 质粒上的IS元素可能通过基因破坏对AMR进化作出贡献.
研究的目的:
- 通过IS介导的基因失活来研究等离子体在促进AMR中的作用.
- 为了确定等离子体编码的IS元素是否会增加抗生素耐药性获得的速度.
- 探索IS介导的基因失活在AMR进化中的流行率和机制.
主要方法:
- 结合实验,生物信息和计算方法.
- 使用的等离子体pOXA-48编码IS1元素在Klebsiella pneumoniae.
- 选的基因组数据库用于塑体编码的IS元素和基因失活事件.
- 开发了一个计算模型来模拟细菌群体中的AMR获取.
主要成果:
- 等离子体POXA-48通过IS1介导的基因破坏显著增加了Klebsiella pneumoniae中多种抗生素耐药性的获得率.
- 基因组数据库查证实IS介导的基因失活是AMR演变中的广泛机制.
- 结合性等离子体被证明可以在复杂的细菌群体内促进这种AMR获取途径.
结论:
- 结合性等离子体通过耐药性基因传播和IS介导的基因失活来促进AMR的演变.
- 由塑体编码的IS元素引起的IS介导的基因破坏是获得AMR的重要,以前被低估的机制.
- 了解这些机制对于打击在临床环境中抗菌素耐药性的传播至关重要.
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