转录共抑制改变了耐药性的演变,并增强了Mycobacterium 结核病从颗粒瘤的清除
Barbara Bosch1, Vanisha Munsamy-Govender2, Jansy Sarathy3,4
1Laboratory of Molecular Pathogenesis, The Rockefeller University, New York, NY, USA. bbosch@rockefeller.edu.
一种名为AAP-SO2的新药向了导致结核病的细菌Mycobacterium tuberculosis (Mtb) 的转录周期. 这种方法可以对抗利芬素耐药性,并有效清除持久的Mtb种群.
科学领域:
- 微生物学 微生物学
- 药物发现 药物发现 药物发现
- 分子生物学分子生物学
背景情况:
- 结核病 (TB) 仍然是全球主要的死亡原因,由Mycobacterium tuberculosis (Mtb) 引起.
- 药物耐药性和持续的Mtb种群使治疗疗效复杂化.
- 由突变驱动的利芬辛耐药性,通过影响转录,损害了第一线结核病治疗.
研究的目的:
- 研究转录周期作为一种新型抗菌向对抗Mtb.
- 描述AAP-SO2,一种RNA聚合酶抑制剂,其针对Mtb.的活性.
- 评估AAP-SO2在克服利芬素耐药性和治疗持久性Mtb.治疗中的潜力.
主要方法:
- 一种RNA聚合酶抑制剂AAP-SO2的表征,其针对Mtb.的全细胞活性.
- 对AAP-SO2对细菌转录周期 (延长和终止) 的作用机制的分析.
- 评估AAP-SO2对Mtb.里芬素耐药性演变的影响.
- 在模拟非复制性Mtb.模拟的ex vivo子颗粒瘤模型中评估组合疗法 (利番素+AAP-SO2).
主要成果:
- AAP-SO2通过减缓核酸添加周期,破坏延长和终止,有效地抑制Mtb转录.
- 里芬素耐药性突变在转录周期中产生可利用的弱点.
- 用AAP-SO2抑制转录减少了对利芬素耐药性的出现.
- AAP-SO2在对抗常见的抗利芬素的Mtb突变体方面表现出特别高的疗效.
- 结合治疗里法辛和AAP-SO2显示在粒瘤模型中协同杀死非复制的Mtb.
结论:
- 用像AAP-SO2这样的抑制剂向转录周期提供了一种可行的策略,以对抗Mtb.中的利芬辛耐药性.
- 利用转录周期中的功能漏洞可以增强持久性和耐药性Mtb群体的清除.
- 结合疗法有望改善结核病治疗对抗抗拒性感染的治疗结果.
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