结核菌 (Mycobacterium tuberculosis) 在巨细胞中操纵LINC02528,以调节抗结核的代谢免疫力
Yuzhong Xu1,2,3, Kehong Zhang1,2, Sinan Li2
1Department of Clinical Laboratory, Shenzhen Baoan Hospital/The Second Affiliated Hospital of Shenzhen University, Shenzhen University Medical School, Shenzhen, China.
PLoS pathogens
|December 23, 2025
概括
结核病 (TB) 细菌通过操纵控制线粒体功能和新陈代谢的长非编码RNA (LINC02528) 来逃避免疫反应. 向LINC02528可能通过激活氧化应激和炎症来恢复宿主对结核病的防御.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 微生物学 微生物学
背景情况:
- 宿主免疫反应极大地决定了结核病 (TB) 感染的结果.
- 氧化应激对宿主抗击Mycobacterium tuberculosis (Mtb) 的防御至关重要,但Mtb逃避这种防御的机制尚不清楚.
- 了解Mtb如何操纵宿主氧化还原稳定是开发新的结核病治疗方法的关键.
研究的目的:
- 确定参与对Mtb感染免疫反应的新型宿主因素.
- 阐明一个新发现的长非编码RNA,LINC02528,在Mtb病原和宿主防御中的作用.
- 研究LINC02528影响宿主细胞代谢和免疫力的分子机制.
主要方法:
- 结核病患者外周血液单核细胞 (PBMC) 中LINC02528的识别和上调分析.
- 在巨细胞中通过CRISPR-Cas9中介敲除LINC02528,以评估其功能作用.
- 同定位分析和淘汰实验,以确定LINC02528与TOMM22.22的相互作用.
- 测量线粒体活性氧物种 (mtROS) 生产和细胞外酸化率 (ECAR),以评估代谢变化.
主要成果:
- 在结核病患者的PBMC中,LINC02528被上调,并转移到感染Mtb巨细胞的细胞质中.
- 在巨细胞中LINC02528淘汰会降低Mtb存活率并增加IL-1β表达,这种效应被IL-1受体对抗剂阻断.
- LINC02528直接与TOMM22结合,其缺乏会增加糖解和mtROS的产生.
- TOMM22的淘汰模仿了LINC02528的删除效应,表明了功能上的相互依赖.
结论:
- Mtb利用LINC02528来劫持lncRNA-线粒体轴,改变免疫逃避的氧化还原代谢检查点.
- 针对LINC02528可以通过重新激活mtROS-IL-1β介导的抗菌防御来破坏Mtb的免疫逃避策略.
- 这项研究揭示了LINC02528作为结核病治疗的潜在治疗点.
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