I型干扰素通过调节致病性T助手17细胞中的microRNA-21-FOXO1轴来限制中枢神经系统的自身免疫力
Johnna Francis Varghese1, Mai Fujiwara1, Amrendra K Ajay2
1Ann Romney Center for Neurologic Diseases, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA.
Science translational medicine
|September 10, 2025
概括
干扰素-β (IFN-β) 通过减少微RNA-21 (miR-21) 和致病性TH17细胞来治疗多发性硬化症. 抑制miR-21可能有利于对IFN-β治疗无反应者.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 干扰素-β (IFN-β) 是多发性硬化症 (MS) 的一线治疗方法.
- 在MS中IFN-β的治疗作用背后的精确细胞和分子机制仍然不完全理解.
- 了解这些机制对于优化治疗策略和识别不响应患者至关重要.
研究的目的:
- 阐明IFN-β在实验性自身免疫脑膜炎 (EAE) 中发挥治疗作用的分子机制,MS的小鼠模型.
- 研究微RNA-21 (miR-21) 和致病性TH17 (pTH17) 细胞在IFN-β的疗效中的作用.
- 探索针对miR-21作为治疗策略的潜力,特别是针对IFN-β非响应者.
主要方法:
- 利用EAE小鼠模型研究MS病原和IFN-β治疗效果.
- 进行了体外实验,包括miR-21的遗传淘汰,以评估其对pTH17细胞分化的影响.
- 在小鼠模型和人类患者样本中分析了细胞因子概况和细胞种群 (对IFN-β的响应者与非响应者).
主要成果:
- 在EAE模型中,IFN-β治疗与miR-21和pTH17细胞减少有关.
- 通过对转录因子Foxo1.1进行上调,对miR-21的遗传删除抑制了pTH17的分化.
- 通过调节髓质细胞的细胞因子分泌,IFN-β间接降低了T细胞中的miR-21诱导.
- 与反应者相比,对IFN-β无反应者表现出较高的miR-21诱导细胞因子和miR-21/pTH17细胞因子水平.
- 直接抑制miR-21有效地降低了pTH17在非响应T细胞中的分化.
结论:
- 包括IFN-β在内的I型干扰素信号,通过抑制miR-21依赖的pTH17细胞发育来限制中枢神经系统的自身免疫力.
- miR-21在促进pTH17分化和驱动自身免疫性方面发挥着至关重要的作用.
- 向miR-21提供了一个潜在的治疗途径,特别是对于那些不响应IFN-β治疗的MS患者.
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