Mapping the evolutionary landscape of Zika virus infection in immunocompromised mice.

Mapping the evolutionary landscape of Zika virus infection in immunocompromised mice.
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DOI:
10.1093/ve/veaa092
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发表时间:
2020-07
期刊:
影响因子:
5.3
通讯作者:
Stapleford KA
Stapleford KA
中科院分区:
医学2区
文献类型:
--
作者:
Johnson KEE;Noval MG;Rangel MV;De Jesus E;Geber A;Schuster S;Cadwell K;Ghedin E;Stapleford KA

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虫媒病毒在自然界中如何进化以及是什么调节了适应过程的基本基础仍不清楚。为了解决这一问题,我们在免疫功能低下的小鼠中建立了寨卡病毒(ZIKV)媒介传播系统,研究了寨卡病毒感染的进化特征。利用这个系统,我们定义了影响ZIKV感染进化景观的因素,并表明传播途径和特定的器官微环境影响病毒多样性和缺陷病毒基因组的产生。此外,我们在小鼠中发现了以前在自然感染中看到的ZIKV突变体的出现,包括目前流行的亚洲和美洲毒株中的变异,以及小鼠感染特有的突变。通过这些研究,我们建立了一个昆虫到小鼠的传播模型来研究寨卡病毒在体内的进化。我们还定义了器官微环境和感染途径如何影响ZIKV进化景观,从而对调节虫媒病毒进化和出现的因素有了更深入的了解。
The fundamental basis of how arboviruses evolve in nature and what regulates the adaptive process remain unclear. To address this problem, we established a Zika virus (ZIKV) vector-borne transmission system in immunocompromised mice to study the evolutionary characteristics of ZIKV infection. Using this system, we defined factors that influence the evolutionary landscape of ZIKV infection and show that transmission route and specific organ microenvironments impact viral diversity and defective viral genome production. In addition, we identified in mice the emergence of ZIKV mutants previously seen in natural infections, including variants present in currently circulating Asian and American strains, as well as mutations unique to the mouse infections. With these studies, we have established an insect-to-mouse transmission model to study ZIKV evolution in vivo. We also defined how organ microenvironments and infection route impact the ZIKV evolutionary landscape, providing a deeper understanding of the factors that regulate arbovirus evolution and emergence.
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