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Virus-Cell Interactions

CD81 Is Required for Hepatitis C Virus Glycoprotein-Mediated Viral Infection

Jie Zhang, Glenn Randall, Adrian Higginbottom, Peter Monk, Charles M. Rice, Jane A. McKeating
Jie Zhang
1Center for the Study of Hepatitis C, Laboratory of Virology and Infectious Diseases, The Rockefeller University, New York, New York 10021
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Glenn Randall
1Center for the Study of Hepatitis C, Laboratory of Virology and Infectious Diseases, The Rockefeller University, New York, New York 10021
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Adrian Higginbottom
2School of Medicine and Biomedical Sciences, University of Sheffield, Sheffield S10 2RX, United Kingdom
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Peter Monk
2School of Medicine and Biomedical Sciences, University of Sheffield, Sheffield S10 2RX, United Kingdom
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Charles M. Rice
1Center for the Study of Hepatitis C, Laboratory of Virology and Infectious Diseases, The Rockefeller University, New York, New York 10021
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Jane A. McKeating
1Center for the Study of Hepatitis C, Laboratory of Virology and Infectious Diseases, The Rockefeller University, New York, New York 10021
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  • For correspondence: mckeatj@rockefeller.edu
DOI: 10.1128/JVI.78.3.1448-1455.2004
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ABSTRACT

CD81 has been described as a putative receptor for hepatitis C virus (HCV); however, its role in HCV cell entry has not been characterized due to the lack of an efficient cell culture system. We have examined the role of CD81 in HCV glycoprotein-dependent entry by using a recently developed retroviral pseudotyping system. Human immunodeficiency virus (HIV) pseudotypes bearing HCV E1E2 glycoproteins show a restricted tropism for human liver cell lines. Although all of the permissive cell lines express CD81, CD81 expression alone is not sufficient to allow viral entry. CD81 is required for HIV-HCV pseudotype infection since (i) a monoclonal antibody specific for CD81 inhibited infection of susceptible target cells and (ii) silencing of CD81 expression in Huh-7.5 hepatoma cells by small interfering RNAs inhibited HIV-HCV pseudotype infection. Furthermore, expression of CD81 in human liver cells that were previously resistant to infection, HepG2 and HH29, conferred permissivity of HCV pseudotype infection. The characterization of chimeric CD9/CD81 molecules confirmed that the large extracellular loop of CD81 is a determinant for viral entry. These data suggest a functional role for CD81 as a coreceptor for HCV glycoprotein-dependent viral cell entry.

  • Copyright © 2004 American Society for Microbiology
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CD81 Is Required for Hepatitis C Virus Glycoprotein-Mediated Viral Infection
Jie Zhang, Glenn Randall, Adrian Higginbottom, Peter Monk, Charles M. Rice, Jane A. McKeating
Journal of Virology Jan 2004, 78 (3) 1448-1455; DOI: 10.1128/JVI.78.3.1448-1455.2004

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CD81 Is Required for Hepatitis C Virus Glycoprotein-Mediated Viral Infection
Jie Zhang, Glenn Randall, Adrian Higginbottom, Peter Monk, Charles M. Rice, Jane A. McKeating
Journal of Virology Jan 2004, 78 (3) 1448-1455; DOI: 10.1128/JVI.78.3.1448-1455.2004
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KEYWORDS

Antigens, CD
hepacivirus
membrane proteins
Receptors, Virus
Viral Envelope Proteins
viral structural proteins

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