A CRISPR Activation Screen Identifies a Pan-avian Influenza Virus Inhibitory Host Factor.

A CRISPR Activation Screen Identifies a Pan-avian Influenza Virus Inhibitory Host Factor.
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CRISPR激活屏幕鉴定了泛avian流感病毒抑制性宿主因子。

DOI:
10.1016/j.celrep.2017.07.060
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发表时间:
2017-08-15
期刊:
影响因子:
8.8
通讯作者:
Heaton NS
Heaton NS
中科院分区:
生物学1区
文献类型:
--
作者:
Heaton BE;Kennedy EM;Dumm RE;Harding AT;Sacco MT;Sachs D;Heaton NS

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甲型流感病毒(IAV)是一种对人类健康构成重大风险的病原体。因此,制定预防流感疾病的战略至关重要。已经进行了许多功能丧失筛选以鉴定病毒感染所需的宿主蛋白。然而,还没有系统的筛选来鉴定当过度表达时足以预防感染的宿主因子。在这项研究中,我们利用CRISPR/dCas 9激活技术进行全基因组过表达筛选,以鉴定IAV限制因子。来自我们筛选的主要命中物B4 GALNT 2显示出对流感病毒的抑制活性,具有α 2,3连接的唾液酸受体偏好。事实上,B4 GALNT 2过表达阻止了每一种测试的禽流感病毒株的感染,包括H5、H9和H7亚型,这些亚型以前曾在人类中引起疾病。因此,我们利用CRISPR/dCas 9激活技术来鉴定可以完全消除禽流感病毒感染的因子。
Influenza A virus (IAV) is a pathogen that poses significant risks to human health. It is therefore critical to develop strategies to prevent influenza disease. Many loss-of-function screens have been performed to identify the host proteins required for viral infection. However, there has been no systematic screen to identify the host factors that when over-expressed are sufficient to prevent infection. In this study, we utilized CRISPR/dCas9 activation technology to perform a genome-wide overexpression screen to identify IAV restriction factors. The major hit from our screen, B4GALNT2, showed inhibitory activity against influenza viruses with an α2,3 linked sialic acid receptor preference. In fact, B4GALNT2 overexpression prevented the infection of every avian influenza virus strain tested, including the H5, H9, and H7 subtypes, which have previously caused disease in humans. Thus, we have utilized CRISPR/dCas9 activation technology to identify a factor that can completely abolish infection by avian influenza viruses.
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