Summary
The type I interferon and IFNAR play an important role in hepatitis B virus (HBV) infection and anti-HBV therapy. However, its mechanism of action is still poorly understood. To gain more insights into the role of type I interferon and type I interferon receptor (IFNAR) in HBV infection, we established an HBV persistent replication IFNAR knockout (IFNAR−/−) mouse model and preliminarily applied this model. At first, the progeny of IFNAR−/− mouse was reproduced. Then hydrodynamic injection with pAAV/HBV1.2 plasmid was conducted to establish the persistent HBV replication IFNAR−/− mouse model. At last, we applied this model to evaluate the effect of nucleoside analogues entecavir (ETV) on HBV replication. It was found that there was no difference in the serum HBsAg and HBeAg levels and HBcAg expression in the liver tissue between the ETV treated groups and normal saline (NS) treated group, but the serum HBV DNA levels were significantly suppressed 10, 25, 40 and 55 days after the ETV treatment [P=0.035, P=0.00, P=0.149 and P=0.084, IFNAR knockout (KO) control group vs. C57BL/6 ETV groups, respectively; P=0.081, P=0.001, P=0.243 and P=0.147, IFNAR KO control group vs. IFNAR KO ETV groups, respectively]. Interestingly, there was no difference in serum HBV DNA levels between the ETV treated IFNAR−/− and C57BL/6 mice. This result suggests that HBV suppression during ETV treatments doesn’t depend on type I interferon and IFNAR. Collectively, persistent HBV replication IFNAR−/− mouse model that we established is a useful and convenient tool to detect the function of the type I interferon and IFNAR in HBV infection and anti-HBV treatments.
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This project was supported by grants from the National Natural Science Foundation of China (No. 81001313), China Postdoctoral Science Foundation (No. 2009046094), National Science and Technology Major Projects (No. 2008ZX10002-011), National Key Basic Research Program of China (Nos. 2007CB512804 and 2009CB522506) and International Science and Technology Cooperation Program (No. 2011DFA31030)
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Chen, Mf., Lin, Y., Xia, Yc. et al. Establishment and application of hepatitis B virus persistent replication model in IFNAR−/− mouse. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 33, 392–397 (2013). https://doi.org/10.1007/s11596-013-1130-y
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DOI: https://doi.org/10.1007/s11596-013-1130-y