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Tembusu virus enters BHK-21 cells through a cholesterol-dependent and clathrin-mediated endocytosis pathway

文献类型： 外文期刊

作者： Zhang, Lijiao 1 ; Zhao, Dongmin 1 ; Han, Kaikai 1 ; Huang, Xinmei 1 ; Liu, Yuzhuo 1 ; Liu, Qingtao 1 ; Yang, Jing 1 ; Li, 1 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Vet Med, Key Lab Vet Biol Engn & Technol, Minist Agr, Nanjing, Peoples R China

2.North China Univ Sci & Technol, Lab Anim Ctr, Tangshan, Peoples R China

关键词： Tembusu virus; BHK-21 cells; Virus entry; Cholesterol dependent; Clathrin mediated

期刊名称：MICROBIAL PATHOGENESIS （ 影响因子：3.738； 五年影响因子：3.663 ）

ISSN： 0882-4010

年卷期： 2020 年 147 卷

页码：

收录情况： SCI

摘要： Tembusu virus (TMUV) is a newly emerging flavivirus and has caused significant economic loss to the poultry industry in China. To date, the entry of TMUV into host cells remains poorly understood. Here, the mechanism of TMUV entry into BHK-21 cells was investigated. The depletion of cellular cholesterol by methyl-beta-cyclodextrin led to a significant decline in the titers and RNA levels of the infectious TMUV. This reduction was restored by supplementation of exogenous cholesterol. Membrane cholesterol depletion mainly blocked viral internalization but not attachment. However, viral infection was unaffected by genistein treatment or caveolin-1 silencing by small interfering RNA. In addition, clathrin-mediated endocytosis might be utilized in TMUV entry given that the viral infection was inhibited by knockdown of clathrin heavy chain and treatment of chlorpromazine (CPZ). Moreover, the number of internalized virus particles decreased under CPZ treatment. Dynasore inhibited TMUV entry suggesting a role for dynamin. Our results reveal that TMUV entry into BHK-21 cells is dependent on cholesterol, clathrin and dynamin but not caveolae.

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