IRE1/XBP1s轴调节ZIKV感染期间常规状细胞的先天免疫反应
Mónica Guzmán-Rodríguez1, Tomás Hernández-Díaz2,3, Paula Lisboa1
1Immunology Program, Laboratory of Immunology and Cellular Stress, Faculty of Medicine, Institute of Biomedical Sciences, Universidad de Chile, Santiago, Chile.
寨卡病毒 (ZIKV) 通过感染激活常规树突细胞 (cDCs),触发I型干扰素和炎症性细胞因子. IRE1/XBP1s通路对于这种对ZIKV.的cDC反应至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 细胞生物学 细胞生物学
背景情况:
- 树突细胞 (DCs) 对抗病毒免疫非常重要,但它们在寨卡病毒 (ZIKV) 感染中的特定作用尚未完全理解.
- 传统的树突细胞 (cDCs) 编排了适应性免疫,但它们对ZIKV的反应机制需要进一步研究.
- 之前的研究主要集中在单细胞衍生的DCs上,留下了关于ZIKV对cDC激活的知识差距.
研究的目的:
- 研究传统树突细胞 (cDCs) 对寨卡病毒 (ZIKV) 感染的反应.
- 阐明ZIKV诱导cDC激活的机制,重点关注细胞因子的产生.
- 确定负责ZIKV识别的特定cDC子集和相关的信号通路.
主要方法:
- 用小鼠cDC培养物来研究ZIKV感染和激活.
- 使用流细胞计分析cDC子集和分子表达 (例如CD86).
- 用基因操纵 (XBP1s的损失) 来评估IRE1/XBP1s通路在cDC功能中的作用.
主要成果:
- 寨卡病毒感染,不仅仅是病毒检测,激活cDCs,诱导I型干扰素 (IFN-I) 和促炎细胞因子.
- 感染ZIKV的cDCs强烈激活了展开蛋白质反应 (UPR) 的IRE1/XBP1s轴.
- 1型cDCs (cDC1s) 被确定为cDCs中的主要ZIKV感应子集.
- 失去XBP1s会损害CD86表达和cDC中的细胞因子产生,但不会增加ZIKV的易感性.
- 组织寄存的cDCs在体内易受ZIKV感染.
结论:
- IRE1/XBP1s通路对于对ZIKV的反应中调节cDC激活至关重要.
- 通过cDCs的病毒识别与通过IRE1/XBP1s途径的功能成熟有关.
- 这项研究强调了cDC抗病毒防御中的未展开的蛋白质反应 (UPR),这表明了flavivirus感染的潜在治疗点.
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