在Takayasu动脉炎中,ANK2-MAVS信号功能障碍会触发线粒体压力,并增强IL-8介导的炎症反应
Si Chen1, Xiaoyue Sun2, Jing Zhang3
1Department of Clinical Laboratory, Beijing Anzhen Hospital, Capital Medical University, Beijing, China.
Free radical biology & medicine
|November 17, 2025
概括
儿童塔卡亚苏动脉炎 (c-TA) 涉及影响线粒体的罕见ANK2基因变异. 这导致炎症和严重的狭窄,IL-8可能成为关键生物标志物.
科学领域:
- 遗传学和免疫学 遗传学和免疫学
- 血管生物学 血管生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 童年开始的塔卡亚苏动脉炎 (c-TA) 是一种严重的自身免疫性血管炎,遗传原因不明.
- 与成人开始的塔卡亚苏动脉炎 (a-TA) 相比,c-TA患者经常出现更严重的缩.
研究的目的:
- 确定c-TA的遗传驱动因素,并了解将遗传缺陷与严重缩症联系在一起的机制.
- 探索ANK2基因及其下游途径在血管炎症和动脉狭窄中的作用.
主要方法:
- 在25名c-TA患者中进行全外组测序,以确定遗传变异.
- 使用ANK2-倒置模型评估线粒体功能和炎症反应的功能研究.
- 综合的多omics分析 (RNA-seq,蛋白质组学,代谢组学,ATAC-seq) 以阐明分子途径.
- 在131名a-TA患者的独立队列中验证发现.
主要成果:
- 在c-TA患者中发现了两种极为罕见的ANK2基因变异 (p.L251I和p.P1306S),这些患者患有侵袭性动脉狭窄症.
- 缺乏ANK2会破坏线粒体的结构和功能,导致生物能压力.
- ANK2的枯竭激活了线粒体抗病毒信号蛋白 (MAVS) 途径,增加了IL-6和IL-8的分泌.
- 在a-TA患者中,血清IL-8水平升高与缩风险增加和内皮屏障功能障碍相关.
结论:
- ANK2-MAVS-IL-8轴代表了一条关键通路,将线粒体的生物能压力与塔卡亚苏动脉炎中的血管炎症连接起来.
- 在c-TA中,ANK2基因变异有助于严重的缩.
- IL-8是a-TA中严重缩的潜在生物标志物,将儿科遗传因素与成人病理联系起来.
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