naRNA-LL37复合DAMP将无菌NET定义为炎症的自我传播驱动因素
Francesca Bork1, Carsten L Greve1, Christine Youn2
1Institute of Immunology, Department of Innate Immunity, University of Tübingen, Auf der Morgenstelle 15, 72076, Tübingen, Germany.
EMBO reports
|May 23, 2024
概括
与NET相关的RNA (naRNA) 通过刺激进一步的NET形成来放大中性粒细胞激活和皮肤炎症. 这一途径涉及TLR8-NLRP3炎症酶和NOD2信号传递,为牛皮等炎症性疾病提供了潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 皮肤病学 皮肤病学
背景情况:
- 中性细胞外细胞陷 (NETs) 对于对微生物的天生的免疫力至关重要.
- 失调的NET形成与诸如动脉样硬化,关节炎和牛皮等炎症状况有关.
- 连接NET与炎症的确切机制仍然不完全理解.
研究的目的:
- 阐明NET关联RNA (naRNA) 在放大NET形成和驱动炎症中的作用.
- 研究参与naRNA诱导的中性粒细胞和角质细胞激活的信号通路.
- 探索针对炎症性疾病中naRNA传感的治疗潜力.
主要方法:
- 研究了naRNA在原始多态核中性粒细胞 (PMN) 中刺激NET形成的能力.
- 利用基于细胞的测试来检查角质细胞对naRNA的反应,包括基因表达分析.
- 在体内使用RNA感应的基因切除,以评估对皮肤炎症的影响.
- 描述了naRNA-LL37复合体作为一个与损伤相关的分子模式 (DAMP).
主要成果:
- 发现naRNA通过TLR8-NLRP3炎症酶依赖途径刺激了天真PMN中的进一步NET形成.
- 角质细胞通过非典型的NOD2-RIPK信号传递对naRNA作出反应,通过上调与牛皮相关的基因 (例如IL17,IL36) .
- 在体内,naRNA诱导了暂时的皮肤炎症,通过抑制RNA传感而显著减少.
- 在中性粒中预存储的naRNA-LL37 DAMP暂时放大中性粒激活.
结论:
- naRNA作为NET形成和相关炎症的强大放大剂.
- 纳RNA-LL37 DAMP有助于无菌炎症,这可能对像牛皮这样的疾病产生潜在影响.
- 针对naRNA传感是一个有前途的治疗策略,用于管理由失调的NETosis驱动的炎症状况.
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