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Journal of Virology, May 2004, p. 5233-5243, Vol. 78, No. 10
0022-538X/04/$08.00+0     DOI: 10.1128/JVI.78.10.5233-5243.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Analysis of Host Range Phenotypes of Primate Hepadnaviruses by In Vitro Infections of Hepatitis D Virus Pseudotypes

Azeneth Barrera,1,2 Bernadette Guerra,1 Helen Lee,1 and Robert E. Lanford1,2*

Department of Virology and Immunology, Southwest National Primate Research Center, Southwest Foundation for Biomedical Research, San Antonio, Texas 78227,1 Department of Microbiology, The University of Texas Health Science Center at San Antonio, San Antonio, Texas 782292

Received 2 December 2003/ Accepted 21 January 2004

Hepatitis B virus (HBV) and woolly monkey hepatitis B virus (WMHBV) have natural host ranges that are limited to closely related species. The barrier for infection of primates seems to be at the adsorption and/or entry steps of the viral replication cycle, since a human hepatoma cell line is permissive for HBV and WMHBV replication following transfection of cloned DNA. We hypothesized that the HBV and WMHBV envelope proteins contain the principal viral determinants of host range. As previously shown by using the hepatitis D virus (HDV) system, recombinant HBV-HDV particles were infectious in chimpanzee as well as human hepatocytes. We extended the HDV system to include HDV particles pseudotyped with the WMHBV envelope. In agreement with the natural host ranges of HBV and WMHBV, in vitro infections demonstrated that HBV-HDV and WM-HDV particles preferentially infected human and spider monkey cells, respectively. Previous studies have implicated the pre-S1 region of the large (L) envelope protein in receptor binding and host range; therefore, recombinant HDV particles were pseudotyped with the hepadnaviral envelopes containing chimeric L proteins with the first 40 amino acids from the pre-S1 domain exchanged between HBV and WMHBV. Surprisingly, addition of the human amino terminus to the WMHBV L protein increased infectivity on spider monkey hepatocytes but did not increase infectivity for human hepatocytes. Based upon these data, we discuss the possibility that the L protein may be comprised of two domains that affect infectivity and that sequences downstream of residue 40 may influence host range and receptor binding or entry.


* Corresponding author. Mailing address: Department of Virology and Immunology, Southwest National Primate Research Center, Southwest Foundation for Biomedical Research, 7620 NW Loop 410, San Antonio, TX 78227. Phone: (210) 258-9445. Fax: (210) 670-3329. E-mail: rlanford{at}sfbr.org.


Journal of Virology, May 2004, p. 5233-5243, Vol. 78, No. 10
0022-538X/04/$08.00+0     DOI: 10.1128/JVI.78.10.5233-5243.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.




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