Characterization of rotavirus cell entry

被引:105
作者
Martín, CSS [1 ]
López, T [1 ]
Arias, CF [1 ]
López, S [1 ]
机构
[1] Univ Nacl Autonoma Mexico, Inst Biotecnol, Dept Genet Desarrollo & Fisiol Mol, Cuernavaca 62210, Morelos, Mexico
关键词
D O I
10.1128/JVI.78.5.2310-2318.2004
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
While recently we have learned much about the viral and cellular proteins involved in the initial attachment of rotaviruses to MA104 cells, the mechanism by which these viruses reach the interior of the cell is poorly understood. For this study, we observed the effects of drugs and of dominant-negative mutants, known to impair clathrin-mediated endocytosis and endocytosis mediated by caveolae, on rotavirus cell infection. Rotaviruses were able to enter cells in the presence of compounds that inhibit clathrin-mediated endocytosis as well as cells overexpressing a dominant-negative form of Eps15, a protein crucial for the assembly of clathrin coats. We also found that rotaviruses infected cells in which caveolar uptake was blocked; treatment with the cholesterol binding agents nystatin and filipin, as well as transfection of cells with dominant-negative caveolin-1 and caveolin-3 mutants, had no effect on rotavirus infection. Interestingly, cells treated with methyl-beta-cyclodextrin, a drug that sequesters cholesterol from membranes, and cells expressing a dominant-negative mutant of the large GTPase dynamin, which is known to function in several membrane scission events, were not infected by rotaviruses, indicating that cholesterol and dynamin play a role in the entry of rotaviruses.
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页码:2310 / 2318
页数:9
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