在台湾的耐药结核病例中,存在环素耐药性
Sheng-Han Wu1,2, Hsin-Yi Liu1,2, Kuang-Hung Liu1,2
1Tuberculosis Research Center, Centers for Disease Control, Ministry of Health and Welfare, Taipei, Taiwan.
Microbiology spectrum
|June 9, 2025
概括
在耐药结核病 (DR-TB) 中分析了环素耐药性. 阿尔尔基因的突变与耐药性有关,特定突变可能会破坏蛋白质的稳定,导致耐药性.
科学领域:
- 微生物学 微生物学
- 遗传学 是一个遗传学.
- 药理学 药理学是指药理学的学科.
背景情况:
- 环素 (CS) 对于治疗耐药结核病 (DR-TB) 是至关重要的.
- 准确的药物敏感性测试 (DST) 对于有效的DR-TB管理至关重要.
- 世界卫生组织 (WHO) 使用MGIT 960系统为CS提出了临界度 (CC).
研究的目的:
- 为了评估Mycobacterium结核病综合体 (MTBC) 隔离物中的环素 (CS) 耐药性.
- 为了比较 CS 耐药性的表型 DST (pDST) 和基因型 DST (gDST).
- 识别与CS耐药性相关的突变及其对蛋白质稳定性的影响.
主要方法:
- 追溯分析了114个抗利法 (RR) 和抗多药 (MDR) 结核病单体.
- 使用MGIT 960和Sensititre MYCOTB MIC板进行表型DST.
- 通过桑格测序和ALD和ALR基因的全基因组测序进行基因型DST.
主要成果:
- MGIT的CC值为16μg/mL,Sensititre的CC值为8μg/mL,显示与gDST的最佳一致性.
- 确定了五个 (4.4%) CS-MGIT 耐药分离体,所有分离体都有 alr 基因 (M343T,T20M,L113R 和新型 R243S) 的突变.
- 预计ALD和ALR基因的特定突变会破坏蛋白质的稳定,可能导致CS耐药性.
结论:
- 建议的16微克/毫升 (MGIT) 和8微克/毫升 (Sensititre) 的CCs适用于常规的CS敏感性测试.
- 其他基因突变与MTBC中的环素耐药性密切相关.
- 了解特定突变对蛋白质稳定性的影响,可以改善DR-TB治疗策略.
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