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  • Title: Role of clathrin-mediated endocytosis during vesicular stomatitis virus entry into host cells.
    Author: Sun X, Yau VK, Briggs BJ, Whittaker GR.
    Journal: Virology; 2005 Jul 20; 338(1):53-60. PubMed ID: 15936793.
    Abstract:
    Vesicular stomatitis virus (VSV) is well established to enter cells by pH-dependent endocytosis, but mechanistic aspects of its internalization have remained unclear. Here, we examined the functional role of clathrin in VSV entry by expression of a dominant-negative mutant of Eps15 (GFP-Eps15Delta95/295), a protein essential for clathrin-mediated endocytosis. Whereas expression of GFP alone had no effect on VSV infection, expression of GFP-Eps15Delta95/295 severely limited infection. As independent ways to examine clathrin function, we also examined cells that had been treated with chlorpromazine and utilized small interfering RNA (siRNA) techniques. Inhibition of clathrin-mediated endocytosis by chlorpromazine treatment, as well as clathrin knock-down using siRNA duplexes directed against the clathrin heavy chain, also prevented VSV infection. In combination with previous morphological approaches, these experiments establish clathrin as an essential component needed for endocytosis of VSV.
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