炎症酶激活差异是不同结核菌感染结果的基础
bioRxiv : the preprint server for biology
|October 1, 2025
概括
渐进性结核病 (TB) 涉及增加的酸结合蛋白-1 (GBP1) 和缺氧诱导因子1α (HIF-1α),导致NLRP3炎症酶激活. 这一途径决定了结核病的进展与延迟.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 细胞生物学 细胞生物学
背景情况:
- 结核菌菌 (Mtb) 感染的临床结果各不相同,从潜伏性结核病 (TB) 到活跃性结核病 (TB) 不等.
- 驱动这些不同结核病结果的特定细胞机制尚不清楚.
研究的目的:
- 调查细胞通路,包括酸结合蛋白-1 (GBP1),缺氧诱导因子1α (HIF-1α) 和NLRP3炎症酶激活,从而区分渐进和非渐进的Mtb感染.
- 阐明这些途径在确定Mtb感染的临床结果中的作用.
主要方法:
- 子肺部,主要子和人类巨细胞以及由THP-1细胞衍生的巨细胞感染有毒 (HN878) 和不那么有毒 (CDC1551) Mtb菌株.
- 对GBP1,HIF-1α和NLRP3炎症酶激活通路的分析.
- 评估线粒体应激,亡和亡.
- 验证使用巨细胞与击倒HIF-1α或GBP1表达.
主要成果:
- 渐进的Mtb感染 (HN878) 与上调的GBP1,HIF-1α和NLRP3炎症酶激活相关.
- 通过HIF-1α和GBP1调解的NLRP3炎症酶激活,导致进发性感染期间线粒体应激增加,亡和亡.
- 在非进展的Mtb感染期间,这些通路的活性较低 (CDC1551).
- 击败HIF-1α或GBP1证实了它们在影响Mtb感染结果中的作用.
结论:
- 介于HIF-1α和GBP1的NLRP3炎症酶通路的差异激活是Mtb感染结果的关键决定因素.
- 这一途径影响了从潜伏性结核病向活跃性结核病的过渡.
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