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ADAR1:在宿主病毒相互作用中传感dRNA的中央调节器

Congnuan Liu¹, Younho Choi¹

¹Florida Research and Innovation Center, Cleveland Clinic, Port St. Lucie, FL, United States.

Frontiers in immunology

|February 26, 2026

概括

作用于RNA 1 (ADAR1) 的腺氨酸脱氨酶是RNA编辑和免疫的双重调节者. 病毒利用ADAR1为自己的利益,但它也可以对抗病毒感染,影响宿主-病原体相互作用.

科学领域:

分子生物学分子生物学
免疫学免疫学免疫学
病毒学病毒学

背景情况:

作用于RNA 1 (ADAR1) 的腺氨酸脱氨酶通过双链RNA (dsRNA) 的腺氨酸-氨酸 (A-to-I) 编辑来调节RNA稳定性和先天免疫力.
内部dsRNAs的ADAR1编辑防止RNA传感器的异常激活,例如蛋白激酶R (PKR),视网膜酸诱导基因I (RIG-I) 和黑色素瘤分化相关基因5 (MDA5),保持自我RNA耐受性.

研究的目的:

审查ADAR1在病毒感染中的双重作用,检查病毒如何操纵ADAR1以及ADAR1如何影响宿主抗病毒反应.
突出ADAR1的上下文依赖的功能,既是对免疫激活的保护者,也是病毒利用的因素.

主要方法:

关于ADAR1在病毒感染中的功能研究的文献综述.
分析ADAR1对RNA传感器 (PKR,RIG-I,MDA5) 和干扰素反应的影响.
检查病毒策略来调节ADAR1活动.

主要成果:

病毒经常利用ADAR1的免疫调节功能来抑制PKR,RIG-I和MDA5信号,抑制I型干扰素反应,并促进病毒复制,这表明病毒前作用.
ADAR1还可以通过超编辑病毒基因组,破坏病毒RNA结构和调节宿主抗病毒通路来发挥抗病毒作用.
ADAR1的作用取决于上下文,作为病毒与宿主相互作用的关键调节者.

结论:

在病毒感染中,ADAR1起着复杂的,取决于环境的作用,既起着前病毒因素的作用,又起着抗病毒防御机制的作用.
了解病毒对ADAR1的操纵及其对宿主通路的差异性影响对于开发新的抗病毒疗法至关重要.
对ADAR1与病毒和宿主因子的复杂相互作用的进一步研究将促进对病毒免疫逃避的知识.

关键词:

在A-to-I编辑中.在 ADAR1 中,ADAR1 是在PKR中,PKR是PKR.通过RNA感知途径.主体-病毒相互作用.

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