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Updated: Aug 17, 2026

Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
[RNA interference inhibits replication and expression of hepatitis B virus in mice]
Ying Wu1, Ai-long Huang, Ni Tang
1Institute for Viral Hepatitis, Chongqing University of Medical Sciences, Chongqing 400010, China.
Objective:
To develop a mouse model of acute hepatitis B virus infection and to observe the RNA interference-mediated inhibition of HBV replication and expression in the mouse model.
Methods:
Thirty Balb/c mice were randomly divided into 5 equal groups: group A to be injected with pHBV1.3, naked plasmid containing 1.3 time HBV ayw type whole genome eukaryotic expression vector, via the caudal vein as infection group; group B to be injected with pHBV1.3 and pSI-C, plasmid expressing HBV-C specific short hairpin RNA, as interference group; group C to be injected with pHBV1.3 and pSI-C mut, a mutant RNAi vector, as mutant interference group; group D to be injected with pHBV1.3 and pGFP, siRNA transcription vector targeting green fluorescence protein (GFP); and group E to be injected with PBS as blank controls. Six days after blood was collected and the mice were killed and their livers were taken out. ELISA was used to measure the concentration of HBsAg in the serum. Immunohistochemistry and RT-PCR were used to detect the expression of HBcAg and HBV C mRNA in the liver.
Results:
Three days after injection the HBsAg expression in the sera of the infection group was strongly positive. Six days after injection expression of HBsAg was negative in the interference group and blank control group, and was positive in the infection group, mutant interference group, and irrelevant group, however, with significantly lower OD values in the latter 2 groups compared with in the infection group (both P < 0.05). Six days after injection immunohistochemistry showed that HBcAg expression in liver was positive in the infection group, weakly positive in the mutant interference group and irrelevant interference group, and was negative in the blank control group and interference group. RT-PCR showed clear expression of HBV C mRNA in the infection group, mutant interference group, and irrelevant interference.
Conclusion:
RNAi technique specifically and effectively inhibits the replication and expression of HBV. siRNA has significant potential to become a new type antiviral drug. The establishment of an animal model of acute HBV infection in mice by hydrodynamic injection of naked plasmid has solved, to a certain degree, the problem of lack of appropriate animal model of HBV infection.
Insights
RNA interference effectively inhibits hepatitis B virus (HBV) replication in a novel mouse model. This study establishes a valuable tool for HBV research and demonstrates the potential of RNAi as an antiviral therapy.
Area of Science:
- Hepatology
- Virology
- Molecular Biology
Context:
- Hepatitis B virus (HBV) infection remains a significant global health concern.
- The lack of suitable animal models has hindered research into HBV pathogenesis and treatment.
- RNA interference (RNAi) presents a promising therapeutic strategy for viral infections.
Purpose:
- To establish a mouse model for acute hepatitis B virus (HBV) infection.
- To evaluate the efficacy of RNA interference (RNAi) in inhibiting HBV replication and gene expression within this model.
Summary:
- A mouse model of acute HBV infection was developed using hydrodynamic injection of a HBV plasmid.
- RNA interference, specifically using short hairpin RNA targeting HBV, significantly reduced viral markers (HBsAg, HBcAg, and HBV C mRNA).
- Control groups, including a mutant RNAi vector and an irrelevant siRNA, showed less effective inhibition compared to specific RNAi.
Impact:
- Successfully established a functional mouse model for acute HBV infection, addressing a critical research gap.
- Demonstrated the specific and effective inhibitory potential of RNAi against HBV replication and expression.
- Highlights the potential of siRNA as a novel antiviral therapeutic agent for hepatitis B.
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