Long-term inhibition of hepatitis B virus in transgenic mice by double-stranded adeno-associated virus 8-delivered short hairpin RNA.

Abstract:

:RNA interference (RNAi) was reported to block hepatitis B virus (HBV) gene expression and replication in vitro and in vivo. However, it remains a technical challenge for RNAi-based therapy to achieve long-term and complete inhibition effects in chronic HBV infection, which presumably requires more extensive and uniform transduction of the whole infected hepatocytes. To increase the in vivo transfection efficiency in liver, we used a double-stranded adeno-associated virus 8-pseudotyped vector (dsAAV2/8) to deliver shRNA. HBV transgenic mice were used as an animal model to evaluate the inhibition effects of the RNAi-based gene therapy. A single administration of dsAAV2/8 vector, carrying HBV-specific shRNA, effectively suppressed the steady level of HBV protein, mRNA and replicative DNA in liver of HBV transgenic mice, leading to up to 2-3 log(10) decrease in HBV load in the circulation. Significant HBV suppression sustained for at least 120 days after vector administration. The therapeutic effect of shRNA was target sequence dependent and did not involve activation of interferon. These results underscore the potential for developing RNAi-based therapy by dsAAV2/8 vector to treat HBV chronic infection, and possibly other persistent liver infections as well.

journal_name

Gene Ther

journal_title

Gene therapy

authors

Chen CC,Ko TM,Ma HI,Wu HL,Xiao X,Li J,Chang CM,Wu PY,Chen CH,Han JM,Yu CP,Jeng KS,Hu CP,Tao MH

doi

10.1038/sj.gt.3302846

subject

Has Abstract

pub_date

2007-01-01 00:00:00

pages

11-9

issue

1

eissn

0969-7128

issn

1476-5462

pii

3302846

journal_volume

14

pub_type

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