DC-SIGN as an attachment factor mediates Japanese encephalitis virus infection of human dendritic cells via interaction with a single high-mannose residue of viral E glycoprotein.

DC-SIGN as an attachment factor mediates Japanese encephalitis virus infection of human dendritic cells via interaction with a single high-mannose residue of viral E glycoprotein.
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DC-SIGN作为附着因子通过与病毒E糖蛋白的单个高甘露糖残基相互作用介导日本脑炎病毒对人树突状细胞的感染

DOI:
10.1016/j.virol.2015.11.006
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发表时间:
2016-01
期刊:
影响因子:
3.7
通讯作者:
Hu Qinxue
Hu Qinxue
中科院分区:
医学3区
文献类型:
--
作者:
Wang Ping;Hu Kai;Luo Sukun;Zhang Mudan;Deng Xu;Li Chang;Jin Wei;Hu Bodan;He Siyi;Li Mei;Du Tao;Xiao Gengfu;Zhang Bo;Liu Yalan;Hu Qinxue

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皮肤树突状细胞(DC)被认为是第一个防御外来病毒的细胞,可能在日本脑炎病毒(JEV)早期感染中发挥作用。在目前的研究中,在证明了JEV在DC中的生产性感染之后,我们揭示了JEV包膜糖蛋白(E糖蛋白)和DC-SIGN之间的相互作用对于这种感染是重要的,如抗体中和和siRNA敲低实验所证明的。此外,在E糖蛋白的N154高甘露糖N-连接的聚糖被证明是至关重要的JEV结合DC-SIGN和随后的内化,而DC-SIGN内化基序的突变不影响JEV的摄取和内化。这些数据共同表明,DC-SIGN功能作为一个附着因子,而不是进入受体的JEV。我们的研究结果强调了DC-SIGN在JEV早期感染中的潜在意义,为进一步了解JEV如何利用DC-SIGN获得树突状细胞提供了基础。
The skin-resident dendritic cells (DCs) are thought to be the first defender to encounter incoming viruses and likely play a role in Japanese encephalitis virus (JEV) early infection. In the current study, following the demonstration of JEV productive infection in DCs, we revealed that the interaction between JEV envelope glycoprotein (E glycoprotein) and DC-SIGN was important for such infection as evidenced by antibody neutralization and siRNA knockdown experiments. Moreover, the high-mannoseN-linked glycan at N154 of E glycoprotein was shown to be crucial for JEV binding to DC-SIGN and subsequent internalization, while mutation of DC-SIGN internalization motif did not affect JEV uptake and internalization. These data together suggest that DC-SIGN functions as an attachment factor rather than an entry receptor for JEV. Our findings highlight the potential significance of DC-SIGN in JEV early infection, providing a basis for further understanding how JEV exploits DC-SIGN to gain access to dendritic cells.
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