氨基甲基转移酶SMYD2通过促进IRF3脱酸化来抑制抗病毒先天免疫力
Jiacheng Wu1, Ye Hu2, Jiaying Song1
1Department of Immunology, Center for Immunotherapy, Institute of Basic Medical Sciences, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, 100005, China.
Cell death & disease
|September 6, 2023
概括
氨基甲基转移酶SMYD2通过抑制IRF3酸化来抑制抗病毒反应,减少I型干扰素的产生. 缺少SMYD2可增强对病毒感染的抵抗力,突出其在天生的免疫力中的作用.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 病毒学 病毒学
背景情况:
- I型干扰素 (IFN-I) 对抗病毒先天免疫非常重要.
- 化IRF3是启动IFN-I生产的一个关键步骤.
- IFN-I生产的失调与免疫系统疾病有关.
研究的目的:
- 研究氨基甲基转移酶SMYD2在抗病毒先天免疫反应中的作用.
- 阐明SMYD2影响IFN-I生产的机制.
- 确定SMYD2作为病毒感染和免疫疾病的潜在治疗点.
主要方法:
- 在病毒感染期间研究了巨细胞中的SMYD2表达和功能.
- 利用Smyd2缺乏的小鼠来评估体内抗病毒反应.
- 进行共免疫沉试验,研究SMYD2,IRF3和PP1α之间的蛋白质与蛋白质相互作用.
- 评估IRF3酸化水平使用西式涂抹.
主要成果:
- 在对病毒感染的反应中,SMYD2表达抑制IFN-I和促炎细胞因子的产生.
- 由于IFN-I和细胞因子的产生增加,Smyd2缺乏的小鼠对病毒感染的抵抗力增加.
- SMYD2通过其SET插入 (SETi) 域与IRF3域 (DBD和IAD) 相互作用.
- SMYD2将酸酶PP1α招募到IRF3,导致IRF3酸化的减少,独立于其甲基转移酶活性.
结论:
- 通过抑制IRF3酸化,SMYD2作为抗病毒先天免疫反应的负调节剂.
- SMYD2与IRF3的相互作用和PP1α的招募为调节IFN-I生产提供了一个新的机制.
- 准SMYD2可能为治疗病毒感染和相关免疫疾病提供新的策略.
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