在最初的病毒感染地点提供早期宿主保护
Orr-El Weizman1, Nicholas M Adams1, Iona S Schuster2
1Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Cell
|October 24, 2017
概括
通过产生干扰素- (IFN-γ),提供早期的抗病毒免疫力. 肝脏ILC1对于限制原发性感染期间的病毒载荷至关重要,它与树突细胞一起工作.
科学领域:
- 免疫学
- 病毒学
- 细胞生物学
背景情况:
- 对感染的免疫反应涉及组织和循环免疫细胞.
- 组织常驻淋巴细胞在早期抗病毒防御中的确切作用和时间尚不完全理解.
- 在感染部位的初始抗病毒反应的动力学需要进一步阐明.
研究的目的:
- 研究1型内生淋巴细胞 (ILC1) 在早期抗病毒免疫中的作用.
- 澄清ILC1在病毒感染的主要部位对宿主防御的贡献.
- 了解树突细胞与ILC1在启动抗病毒反应中的相互作用.
主要方法:
- 使用小鼠模型研究病毒感染,特别是小鼠细胞大脑病毒 (MCMV).
- 使用基因切除技术来研究Zfp683依赖性肝脏ILC1的功能.
- 分析免疫细胞种群,细胞因子 (IFN-γ,IL-12) 和病毒载量.
主要成果:
- 在病毒感染时,组织内存在的ILC1迅速产生干扰素- (IFN-γ),从而促进早期宿主免疫力.
- 肝脏ILC1的切除导致病毒载量增加,尽管存在功能适应性和先天性免疫细胞.
- 居民XCR1+常规树突细胞 (cDC1) 产生了IL-12,以STAT4依赖的方式促进ILC1IFN-γ的产生,从而限制了早期的病毒负担.
结论:
- 组织内存在的ILC1在初始感染部位的抗病毒免疫监测中起着至关重要的早期作用.
- 局部cDC1衍生细胞因子对于激活ILC1抗病毒功能至关重要.
- ILC1 代表了天生的免疫系统对病毒病原体的第一道防线的关键组成部分.
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