Toward novel immunocompetent animal models for hepatitis B virus infection

Mailly, Laurent; Zeisel, Mirjam B.; Baumert, Thomas F.

doi:10.1002/hep.29249

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2017

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“…However, HBV replication was not detected and HBV cccDNA formation was suggested to be restricted in mouse cells [17][18][19][20]. To circumvent this issue, different alternatives have been proposed.…”

Section: Main Textmentioning

confidence: 99%

Detection of the hepatitis B virus (HBV) covalently-closed-circular DNA (cccDNA) in mice transduced with a recombinant AAV-HBV vector

et al. 2017

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Hepatitis B Virus (HBV) persists in infected hepatocytes as an episomal covalently-closed-circular DNA mini-chromosome, called cccDNA. As the main nuclear transcription template, HBV cccDNA is a key replication intermediate in the viral life cycle. Little is known about the mechanisms involved in its formation, maintenance and fate under antiviral therapies. This is mainly due to the lack of small immune-competent animal models able to recapitulate the entire HBV replication cycle, including formation of HBV cccDNA. Here we report that HBV cccDNA can be detected by Southern blot analyses in the liver of C57BL6 mice transduced with AAV-HBV. HBV cccDNA persists in the liver of these animals together with the AAV-HBV episome. We also set up a PCR strategy to distinguish the HBV cccDNA from the AAV-HBV episome. These suggest that the AAV-HBV/mouse model might be relevant to test drugs targeting HBV cccDNA regulation and persistence.

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Section: Main Textmentioning

confidence: 99%