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在Phlebotomus papatasi沙细胞中对alphanodavirus复制的RNA干扰反应

Akira J T Alexander¹, Rhys H Parry², Maxime Ratinier³

¹MRC-University of Glasgow Centre for Virus Research, Glasgow, UK.

Insect molecular biology

|June 7, 2024

概括

美国诺达病毒 (ANV) 在沙细胞中的复制是由外源性小干扰RNA (exo-siRNA) 途径控制的,而不是PIWI相互作用RNA (piRNA) 途径. 这一发现突显了物种间抗病毒RNAi机制的差异.

科学领域:

病毒学病毒学
分子生物学分子生物学
基因组学就是基因组学.

背景情况:

美国诺达病毒 (ANV) 是一种感染各种生物的病毒类型.
RNA干扰 (RNAi) 路径,包括小干扰RNA (siRNA) 和PIWI相互作用RNA (piRNA) 路径,在抗病毒防御中起着至关重要的作用.
蚊子和多索菲拉物种表现出明显的PIWI通路活动来阻止病毒复制.

研究的目的:

在Phlebotomus papatasi衍生细胞系 (PP9ad) 中识别和表征美国诺达病毒 (ANV) 菌株.
为了研究参与PP9ad细胞中ANV复制的小RNA通路.
分析中的piRNA和siRNA路径的多样性和谱系,以及它们在抗病毒防御中的潜在作用.

主要方法:

小RNA测序和分析.
对Phlebotomus papatasi (Ppap_2.1) 的基因组组装和分析.
小RNAs的基因组测绘.

主要成果:

在PP9ad细胞中的ANV复制主要由外源小干扰RNA (exo-siRNA) 途径准.
与PIWI相互作用的RNA (piRNA) 途径在这些细胞中对ANV复制的参与很小.
对更新的P. papatasi基因组 (Ppap_2.1) 的分析显示,在沙中没有PIWI蛋白扩张,尽管siRNA和piRNA通路都是转录活跃的.

结论:

外型siRNA通路是PP9ad细胞中抗抗病毒复制的主要抗病毒机制.
沙中的piRNA途径可能不会对病毒复制产生反应,这与其他一些物种不同.
这些发现有助于理解基于RNAi的抗病毒免疫的演变和特异性.

关键词:

飞利博托莫斯 (Phlebotomus papatasi) 是一个在地动物.它们是RNAiRNAi.诺达病毒 (Nodavirus) 是一种病毒如果RNApiRNARNA 这是一个vpiRNARNA.所有的人都是VisiRNARNA.

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