系统性硬化症皮肤纤维细胞外基因组触发1型干扰素反应在质细胞通过一个TBK/JAK/STAT信号轴
Jessica Bryon1, Christopher W Wasson1, Katja Koeppen2
1University of Leeds, Leeds, United Kingdom.
Arthritis & rheumatology (Hoboken, N.J.)
|October 17, 2024
概括
系统性硬化症 (SSc) 纤维细胞外体激活皮肤角质细胞中的I型干扰素 (IFN) 反应. 这种由外体介导的交叉交互,有助于在SSc皮肤中观察到的IFN特征,突出显示了潜在的治疗点.
科学领域:
- 免疫学 免疫学 免疫学
- 皮肤病学 皮肤病学
- 细胞生物学 细胞生物学
背景情况:
- I型干扰素 (IFN) 反应与系统性硬化症 (SSc) 中的疾病活性相关.
- 在SSc中组织特异IFN激活的来源尚不清楚.
- 从SSc纤维细胞衍生的外体可以在体外激活巨细胞.
研究的目的:
- 为了确定SSc皮肤活检中的I型IFN签名的来源.
- 研究SSc皮肤纤维细胞外体在I型IFN激活中的作用.
主要方法:
- 来自健康个体和SSc患者的皮肤活检被用于隔离皮肤纤维细胞和角质细胞.
- 外体被从纤维细胞超水体中分离出来,并应用于角质细胞.
- 通过RNA测序分析了角质细胞基因表达;关键信号通路 (TBK,JAK) 被抑制.
主要成果:
- 在SSc皮肤活检中,表皮层的I型IFN反应最高.
- 与健康对照人群相比,SSc纤维细胞的外体细胞显著上调了角质细胞中的IFN签名基因.
- 抑制TANK结合激酶 (TBK) 或Janus激酶 (JAK) 途径抑制了这种外体诱导的IFN特征.
结论:
- 在SSc角质细胞中I型IFN激活取决于皮肤纤维细胞相互作用,特别是通过外体.
- SSc纤维细胞外基因组通过在TBK上游激活模式识别受体来促进皮肤I型IFN激活.
- 这项研究阐明了一种新的细胞间通信机制,驱动SSc的病原性.
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