戈尔吉陷的自身炎症患者CDC42表现出细胞内交通缺陷,导致STING过度激活和ER压力
Alberto Iannuzzo1, Selket Delafontaine2,3, Rana El Masri1,4
1Université Paris Cité, CNRS, Inserm, Institut Cochin, F-75014, Paris, France.
Nature communications
|November 16, 2024
概括
疾病预防控制中心42的突变通过将蛋白质困在戈尔吉器官中引起自身炎症性疾病. 这导致STING通路过度激活和I型干扰素反应,解释了患者的严重症状.
科学领域:
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
- 免疫学 免疫学 免疫学
背景情况:
- 自身炎症性疾病往往源于天生的免疫基因的突变.
- 四种CDC42变体与新生儿发病的细胞衰减,自身炎症和皮疹 (NOCARH综合征) 有关,但机制尚不清楚.
研究的目的:
- 为了阐明自发炎症综合征中CDC42变体的致病机制.
- 调查Golgi-trapped CDC42变种在STING通路激活中的作用.
主要方法:
- 分析了CDC42变种的细胞局部化和运输效应 (p.R186C,p.*192 C*24,p.Y64C,p.C188Y).
- 评估STING通路的激活,I型干扰素的反应和内质网膜应激.
- 将细胞发现与患者关于循环干扰素α (IFNα) 水平的数据相关联.
主要成果:
- 戈尔吉捕获的CDC42变体 (p.R186C,p.*192 C*24) 阻断细胞运输,并增加了戈尔吉的STING积累.
- 这些Golgi-trapped变种独特地过度激活了STING通路,I型干扰素反应,并诱导了内质网膜应激.
- 患有Golgi-trapped CDC42突变的患者在疾病发作期间显示血清IFNα升高.
结论:
- 戈尔吉陷的CDC42变种破坏细胞运输,导致STING通路过度激活.
- 这种机制解释了与这些变体相关的严重自身炎症综合征的发病原因.
- 针对STING激活可能为受影响的患者提供治疗策略.
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