在耐药结核病爆发中发现的rpoABC基因中发现了新的和报告的补偿突变
Derek Conkle-Gutierrez1, Sarah M Ramirez-Busby1, Bria M Gorman1
1Laboratory for Pathogenesis of Clinical Drug Resistance and Persistence, San Diego State University, San Diego, CA, United States.
Frontiers in microbiology
|January 23, 2024
概括
研究人员在Mycobacterium tuberculosis中发现了新的补偿突变,这些突变有助于抵抗Rifampicin的菌株传播. 这些发现有助于检测更适合,更危险的耐药菌株.
科学领域:
- 遗传学 是一个遗传学.
- 微生物学 微生物学
- 进化生物学 进化生物学
背景情况:
- 在 * Mycobacterium 结核病 * 中的利番素 (RIF) 耐药性源于 * rpoB * 突变,通常会产生健康成本.
- 在*rpoABC*基因中的补偿突变可以减轻这一成本,促进RIF耐药性的传播.
- 补偿突变的全谱,特别是罕见的耐药性突变,仍然不完全理解.
研究的目的:
- 为了确定与RIF耐药性相关的*M.结核病*中的新型补偿突变.
- 确定已知和先前报告的补偿突变的流行率.
- 将RIF抗性标记与特定的补偿突变联系起来.
主要方法:
- 在4309个临床 *M.结核病* 隔离物中进行全基因组关联研究.
- 分析全基因组序列,以确定*rpoABC*基因中的突变.
- 统计分析以将RIF抗性突变与补偿性突变相关联.
主要成果:
- 确定了46种具有潜在补偿作用的额外*rpoABC*突变,其中包括11种新标志物.
- 确认了35个先前报告的突变的补偿作用.
- 观察到大多数补偿突变都针对*rpoB*:S450L突变,但一些罕见的耐药性突变可能需要特定的突变组合来补偿.
结论:
- 这项研究扩大了RIF耐药性*M.结核病*中已知补偿突变的范围.
- 发现了新的补偿突变,特别是那些补偿罕见耐药性的突变.
- 识别适应RIF耐药菌株对于预测和控制疫情至关重要.
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