在Clostridioides difficile中Fidaxomicin耐药性:一个系统的审查和使用RNA聚合酶结合点的预测建模
ThanhPhuong M Le1, Taryn A Eubank1, Ann M McKelvey2
1Department of Pharmacy Practice and Translational Research, University of Houston College of Pharmacy, Houston, Texas, USA.
Antimicrobial agents and chemotherapy
|November 6, 2024
概括
在Clostridioides difficile中,菲达克索米辛耐药性与RNA聚合酶的突变有关. 这些遗传变化,特别是在β子单元中,会影响药物结合,并可能预测新出现的耐药性.
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:
- 菲达克索米辛 (Fidaxomicin,FDX) 是一种关键的抗生素,用于治疗*Clostridioides difficile*感染.
- 已经注意到减少FDX疗效的突变,但它们的分子基础尚不清楚.
- 了解FDX耐药机制对于有效治疗至关重要.
研究的目的:
- 系统地审查*C. difficile*分离体中的FDX耐药性.
- 调查与增加的FDX MIC相关的突变是否会影响RNA聚合酶 (RNAP) 结合.
- 为了将基因变化与FDX耐药性发展相关联.
主要方法:
- 在PubMed (1991-2023) 的系统文献搜索中,寻找*C. difficile*突变和FDX MIC.
- 根据纳入/排除标准,分析了7项选定的研究.
- 使用施罗丁格Maestro和PDB数据 (7L7B) 的FDX-RNAP相互作用的分子可视化.
主要成果:
- 在RNAPβ子单元中的V1143突变是最常见的 (~50%).
- 大多数突变发生在RNAP的β'亚单元中.
- 大约三分之一的突变直接影响了RNAP上的FDX结合部位;其他突变在附近.
结论:
- 在*C. difficile*菌株中FDX MIC升高与已知的RNAP结合部位残留相关.
- 基因组分析有可能识别和预测新出现的FDX耐药性.
- 对突变与药物相互作用的进一步研究是有必要的.
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