三醇的催化转移本质上增强了Mycobacterium结核病菌的表型异质性和多药性耐药性
Jae Jin Lee1, Daniel H Swanson2, Sun-Kyung Lee3
1Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
Nature communications
|July 11, 2025
概括
结核菌持续存在,对抗药性至关重要,与三糖代谢有关. 针对这种代谢转变可以减少结核病的耐药性和多药性耐药性.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 细菌中耐药性 (DR) 往往来自耐药性持久性细菌,它们在没有遗传突变的情况下在抗生素治疗中存活.
- 在Mycobacterium tuberculosis (Mtb) 耐药性中持续形成的作用和潜在的机制,特别是三糖代谢,仍然不完全理解.
- 最近的研究表明,在细菌持续形成和药物耐药性的发展中,三糖代谢发生变化.
研究的目的:
- 调查三糖代谢,特别是催化转移在Mycobacterium结核病中形成持久性和发展耐药性的作用.
- 确定是否针对三醇的催化转移可以减轻Mtb的耐药性和多药性耐药性 (MDR).
- 通过三糖代谢探索里法辛耐药性和对其他抗生素的交叉耐药性之间的联系.
主要方法:
- 具有和没有三糖催化转移活性的Mtb突变的比较分析.
- 在抗生素压力下持续形成率的评估.
- 药物耐药性和多药耐药性表型在Mtb菌株中的评估.
- 研究特定的Mtb菌株,包括HN878 W-北京菌株,对三糖的催化转移活性进行调查.
- 测试三醇催化转移的遗传和药理失活的影响.
主要成果:
- 缺乏三醇催化转移活性的突变体由于持续形成的减少,显著减少了耐药突变体.
- 醇的催化转移通过促进代谢异质性和增加药物耐受性来提高抗生素治疗期间的Mtb生存率,从而促进药物耐药性的发展.
- 耐利芬辛的Mtb菌株对其他抗生素呈现交叉耐药性,与较高的三醇催化转移活性相关,解释了多药耐药性的出现.
- HN878 W-北京菌株显示了高的三糖催化转移,表明MDR发展的风险更高.
- 基因或药理抑制三糖催化转移有效地减少了持久性形成和MDR的发展.
结论:
- 三醇的催化转移是Mtb持续形成和随后发展的耐药性和多药性耐药性的关键因素.
- 这种代谢途径代表了对抗结核病耐药性的潜在治疗标.
- 准三糖代谢可以提供一种新的策略,以克服Mtb感染中的抗生素耐药性.
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