White spot syndrome virus enters crayfish hematopoietic tissue cells via clathrin-mediated endocytosis

被引:50
|
作者
Huang, Jiajun [1 ]
Li, Fang [1 ]
Wu, Junjun [1 ]
Yang, Feng [1 ]
机构
[1] State Ocean Adm, Inst Oceanog 3, South China Sea Bioresource Exploitat & Utilizat, Key Lab Marine Genet Resources, Xiamen 361005, Peoples R China
基金
中国国家自然科学基金;
关键词
White spot syndrome virus; Entry; Clathrin-mediated endocytosis; LIPID RAFTS; COATED PITS; ENTRY; CHOLESTEROL; PATHWAY; DYNAMIN; CAVEOLAE; CHOLERA; WSSV; MACROPINOCYTOSIS;
D O I
10.1016/j.virol.2015.08.034
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
White spot syndrome virus (WSSV) is a major pathogen of aquacultured shrimp. However, the mechanism of its entry remains poorly understood. In this study, by analyzing the internalization of WSSV using crayfish hematopoietic tissue (HPT) cells, we showed that WSSV virions were engulfed by cell membrane invaginations sharing the features of clathrin-coated pits and then internalized into coated cytoplasmic vesicles. Further investigation indicated that WSSV internalization was significantly inhibited by chlorpromazine (CPZ) but not genistein. The internalized virions were colocalized with endogenous clathrin as well as transferrin which undergoes clathrin-dependent uptake. Preventing endosome acidification by ammonium chloride (NH4Cl) or chloroquine (CQ) dramatically reduced WSSV entry as well. Moreover, disturbance of dynamin activity or depletion of membrane cholesterol also blocked WSSV uptake. These data indicate that WSSV enters crayfish HPT cells via clathrin-mediated endocytosis in a pH-dependent manner, and membrane cholesterol as well as dynamin is critical for efficient viral entry. (C) 2015 Elsevier Inc. All rights reserved.
引用
收藏
页码:35 / 43
页数:9
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