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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Hepatitis C virus entry depends on clathrin-mediated endocytosis.

Due to difficulties in cell culture propagation, the mechanisms of hepatitis C virus (HCV) entry are poorly understood. Here, postbinding cellular mechanisms of HCV entry were studied using both retroviral particles pseudotyped with HCV envelope glycoproteins (HCVpp) and the HCV clone JFH-1 propagated in cell culture (HCVcc). HCVpp entry was measured by quantitative real-time PCR after 3 h of contact with target cells, and HCVcc infection was quantified by immunoblot analysis and immunofluorescence detection of HCV proteins expressed in infected cells. The functional role of clathrin-mediated endocytosis in HCV entry was assessed by small interfering RNA-mediated clathrin heavy chain depletion and with chlorpromazine, an inhibitor of clathrin-coated pit formation at the plasma membrane. In both conditions, HCVpp entry and HCVcc infection were inhibited. HCVcc infection was also inhibited by pretreating target cells with bafilomycin A1 or chloroquine, two drugs known to interfere with endosome acidification. These data indicate that HCV enters target cells by clathrin-mediated endocytosis, followed by a fusion step from within an acidic endosomal compartment.[1]


  1. Hepatitis C virus entry depends on clathrin-mediated endocytosis. Blanchard, E., Belouzard, S., Goueslain, L., Wakita, T., Dubuisson, J., Wychowski, C., Rouillé, Y. J. Virol. (2006) [Pubmed]
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