线性ubiquitination可以预防炎症,并调节免疫信号
Björn Gerlach1, Stefanie M Cordier, Anna C Schmukle
1Tumour Immunology Unit, Department of Medicine, Imperial College London, W12 0NN London, UK.
Nature
|April 2, 2011
概括
SHARPIN被认为是免疫信号中的关键蛋白质. 它通过调节线性ubiquitination in vivo来预防TNF诱导的细胞死亡和炎症.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 细胞信号传输 细胞信号传输
背景情况:
- 瘤坏死因子 (TNF) 受体超级家族成员对免疫力和炎症至关重要.
- 通过HOIL-1和HOIP组装的线性泛素链与TNF信号传递有关,但它们在体内相关性尚不清楚.
研究的目的:
- 识别涉及TNF信号传递的线性泛素链组合复合物的组成部分.
- 为了研究SHARPIN在免疫调节和炎症中的体内作用.
主要方法:
- 质谱分析TNF信号复合体.
- 对夏宾基因 (Sharpin(cpdm/cpdm)) 的遗传突变分析.
- 评估基因诱导和细胞死亡对TNF,CD40连接体和IL-1β的反应.
主要成果:
- SHARPIN被确定为线性ubiquitin链组装复合物的第三个组成部分,被招募到CD40和TNF受体信号传递中.
- 发现RIP1和NEMO在TNF信号复合体中是线性无处不在的.
- 沙宾突变 (cpdm/cpdm) 导致慢性皮肤炎,淋巴细胞器官发生障碍,基因诱导减弱,以及对TNF诱导死亡的敏感性.
- 在CPDM小鼠中,Tnf基因缺陷可以预防皮肤病变.
结论:
- SHARPIN能够在TNF受体信号复合体中实现线性无化,抑制TNF诱导的细胞死亡并预防炎症.
- 线性ubiquitination在预防炎症和调节免疫信号方面发挥着重要的体内作用.
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