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Expression and Replication of Hepatitis B Virus Genome in Transgenic Mice

Kimi Araki, Jun-Ichi Miyazaki, Okio Hino, Naohiro Tomita, Osamu Chisaka, Kenichi Matsubara and Ken-Ichi Yamamura
Proceedings of the National Academy of Sciences of the United States of America
Vol. 86, No. 1 (Jan. 1, 1989), pp. 207-211
Stable URL: http://www.jstor.org/stable/33087
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Expression and Replication of Hepatitis B Virus Genome in Transgenic Mice
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Abstract

We produced transgenic mice by microinjecting a partial tandem duplication of the complete hepatitis B virus (HBV) genome into fertilized eggs of C57BL/6 mice. One of eight transgenic mice was a high producer for HBV surface antigen (HBsAg) and HBV e antigen (HBeAg) in the serum. The HBV genomes were transmitted to the next generation and these F1 mice also produced HBsAg and HBeAg. mRNAs of 3.5, 2.1, and 0.8 kilobases were detected in the livers and the kidneys of these mice. In addition, a 0.8-kilobase RNA was detected in the testis. Single-stranded and partially double-stranded HBV DNAs were shown to be produced in the cytoplasm of the liver and kidneys. These HBV DNAs were associated with the core particles, indistinguishable from nucleocapsid produced in an infected human liver. Viral genome DNA was detected in the serum. These results demonstrate that the HBV genome integrated into the mouse chromosome acted as a template for viral gene expression, allowing viral replication. Thus, these transgenic mice should be useful for detailed studies of the replication and expression of HBV and for pathological studies of hepatitis, including the development of hepatocellular carcinoma.

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