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抗病毒宿主防御在内源性反元素的背景下的演变

George Kassiotis^1,2, Jonathan P Stoye^1,2

¹The Francis Crick Institute, London, UK.

Science (New York, N.Y.)

|August 7, 2025

概括

哺乳动物宿主使用生殖线防御病毒,但必须区分它们和内源逆转移元素 (RTEs). RTE可以复杂化抗病毒反应,但也提供进化优势.

科学领域:

免疫学
遗传学
病毒学

背景情况:

哺乳动物宿主具有细菌系编码的防御系统来检测和限制病毒感染.
这些防御机制必须区分外部病毒和内生逆转移元素 (RTEs),这些元素被整合到宿主基因组中.
由于病毒和RTE序列的相似性,可以发生免疫交叉反应.

研究的目的:

探索宿主抗病毒防御系统在内源性逆转录病毒和RTEs的挑战和潜在益处.
了解宿主免疫系统如何应对外部病毒和内部遗传寄生虫的威胁.
研究RTEs对宿主抗病毒免疫力的进化影响.

主要方法:

对先天免疫,模式识别受体和限制因素的现有文献的审查.
在哺乳动物宿主中分析RTEs的进化史和基因组集成.
比较基因组学和免疫学研究,以评估病毒和RTE识别之间的交叉反应性.

主要成果:

主体的抗病毒机制是微调的,以区分外来病毒和RTEs等自身组件.
尽管有复杂的区别,但病毒和RTEs之间的免疫交叉反应可能会危及有效的抗病毒反应.
虽然RTEs具有挑战性,但它们可以被宿主用于抗病毒防御和基因进化.

结论:

对于宿主抗病毒免疫来说,RTEs的进化整合是一个复杂的挑战.
宿主免疫系统必须平衡对外部病原体的防御和对内生遗传元素的耐受性.
RTE有可能被选择为新型抗病毒策略的来源,并为免疫基因进化做出贡献.

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