Toll-like receptor agonist R848 blocks Zika virus replication by inducing the antiviral protein viperin.

Toll-like receptor agonist R848 blocks Zika virus replication by inducing the antiviral protein viperin.
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DOI:
10.1016/j.virol.2018.07.014
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发表时间:
2018-09
期刊:
影响因子:
3.7
通讯作者:
Landau NR
Landau NR
中科院分区:
医学3区
文献类型:
--
作者:
Vanwalscappel B;Tada T;Landau NR

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寨卡病毒(ZIKV)是一种与神经疾病有关的新病原体,目前还没有针对性的治疗方法。为了确定限制ZIKV复制的宿主先天性免疫反应蛋白,我们用Toll样受体(TLR)激动剂处理单核细胞和巨噬细胞。在这些受试者中,TLR7/8激动剂R848(瑞斯奎莫特)是最有效的。RNA-seq分析证实了R848在单核细胞中强烈诱导的几个基因。对其中几种病毒限制ZIKV复制能力的测试发现,毒蛇蛋白是一种干扰素诱导的基因,对几种病毒具有活性。用蛇毒慢病毒表达载体转导小胶质细胞CHME3,使其对ZIKV感染具有抵抗力,阻止病毒RNA和蛋白质的合成。巨噬细胞中毒蛇毒素的CRISPR/Cas9敲除(KO)解除了对感染的阻断,表明毒蛇毒素是一种主要的天然免疫反应蛋白,能够阻止ZIKV的复制。TLR激动剂可用于ZIKV的预防或治疗。
Zika virus (ZIKV) is an emerging pathogen linked to neurological disorders for which there is currently no targeted therapy. To identify host innate immune response proteins that restrict ZIKV replication, we treated monocytes and macrophages with toll-like receptor (TLR) agonists. Of those tested, the TLR7/8 agonist R848 (resiquimod) was the most potent. RNA-seq analysis identified several genes strongly induced by R848 in monocytes. Testing of several of these for their ability to restrict ZIKV replication identified viperin, an interferon-induced gene active against several viruses. Transduction of microglial CHME3 cells with a viperin lentiviral expression vector rendered them resistant to ZIKV infection, preventing the synthesis of viral RNA and protein. CRISPR/Cas9 knock-out (KO) of viperin in macrophages relieved the block to infection, demonstrating that viperin is a major innate immune response protein able to block ZIKV replication. TLR agonists may be useful for the prophylactic or therapeutic treatment for ZIKV.
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