转录抑制剂Capicua是细胞内在干扰素反应的守门人
Senthamizharasi Manivasagam1, Julianna Han2, Athmane Teghanemt3
1Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA.
Cell host & microbe
|March 25, 2025
概括
一个类似于 (ATXN1L) 的Capicua (CIC) -Ataxin-1抑制综合体通过静止静止干扰素 (IFN) 和静止静止干扰素刺激基因 (ISG) 来防止有害的炎症. 病毒感染触发MAPK信号,降低CIC-ATXN1L,使强大的抗病毒防御.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 主体抗病毒防御依赖于干扰素 (IFN) 和IFN刺激基因 (ISG).
- 在没有病毒感染的情况下,异常的IFN产生会导致有害的自身炎症.
- 了解IFN/ISG表达的调节对于控制感染和预防自身免疫性疾病至关重要.
研究的目的:
- 为了确定调节干扰素和IFN刺激的基因表达在病毒感染和恒常状态期间的分子机制.
- 阐明Capicua (CIC) -Ataxin-1像 (ATXN1L) 复合体在控制炎症基因表达中的作用.
- 定义一种新范式,用于对抗病毒反应的宿主调节.
主要方法:
- 染色体免疫沉 (ChIP) 用于识别CIC-ATXN1L.L的DNA结合点.
- 报告员分析评估IFN和ISG促进者的转录调节.
- 西方涂抹和蛋白酶体抑制试验用于研究蛋白质复合物的稳定性.
- 人类和小鼠细胞中的病毒感染模型.
主要成果:
- CIC-ATXN1L复合体与IFN和ISG促进体附近的特定动机结合,抑制它们在恒常状态下的表达.
- 在病毒感染期间激活基激活蛋白激酶 (MAPK) 途径会导致CIC-ATXN1L复合体的快速降解.
- 降解CIC-ATXN1L减轻了抑制,使得IFN和ISG的强大诱导成为可能,这对于抗病毒防御至关重要.
结论:
- CIC-ATXN1L复合体作为炎症基因的关键抑制剂,维持宿主平衡.
- 病毒感染触发信号级联,降低CIC-ATXN1L,促进及时和强大的抗病毒免疫的激活.
- 这项研究揭示了一种进化保守的调节机制,控制宿主对病毒感染的反应.
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