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Journal of Virology, June 2001, p. 5084-5089, Vol. 75, No. 11
Department of Medicine II, University of
Freiburg, Freiburg, Germany
Received 17 November 2000/Accepted 6 March 2001
The Asian tree shrew, Tupaia belangeri, has been
proposed as a novel animal model for studying hepatitis B virus (HBV)
infection. Here, we describe a protocol for efficient and reproducible
infection of primary tupaia hepatocytes with HBV. We report that human
serum interferes with HBV binding to the hepatocytes, thus limiting the
maximum multiplicity of infection. Purification of HBV virions by
gradient sedimentation greatly enhances virus binding and infectivity. Covalently closed circular DNA was clearly detectable by Southern blot
analysis and newly synthesized single-stranded HBV DNA was visible 2 weeks postinoculation. Primary tupaia hepatocytes are also susceptible
to infection with the recently discovered woolly monkey hepatitis B
virus (WMHBV) but not to woodchuck hepatitis virus infection. Compared
to HBV, WMHBV replicated at a higher rate with single-stranded DNA
detectable within the first week postinoculation. Primary tupaia
hepatocytes should represent a useful system for studying early steps
of HBV and WMHBV infection.
0022-538X/01/$04.00+0 DOI: 10.1128/JVI.75.11.5084-5089.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Efficient Infection of Primary Tupaia Hepatocytes
with Purified Human and Woolly Monkey Hepatitis B Virus
*
Corresponding author. Mailing address: Department of
Medicine II, University of Freiburg, Hugstetter Strasse 55, D-79106
Freiburg, Germany. Phone: 49-761-2703401. Fax: 49-761-2703610. E-mail:
weiz{at}ukl.uni-freiburg.de.
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