Abstract
Background and aims
The clinical course and responsiveness to antiviral treatments differs among hepatitis B virus (HBV) genotypes. However, the cause of these differences is unclear. In the present study, we compared mRNA expression profiles in human hepatocyte chimeric mice infected with HBV genotypes A and C.
Methods
Fifteen chimeric mice were prepared and divided into the following three groups: uninfected control mice, HBV genotype A-infected mice, and HBV genotype C-infected mice. Human hepatocytes were collected from these mouse livers and gene expression analyses were performed using next-generation RNA sequencing.
Results
Although similar pathways were influenced by HBV infection, including inflammation mediated by chemokine and cytokine signaling, p53, and integrin signaling pathways, expression levels of up-regulated genes by HBV genotype A or C infection were quite different. In HBV genotype A-infected hepatocytes, 172 genes, including KRT23 and C10orf54, were significantly more highly expressed than in HBV genotype C-infected cells, whereas 10 genes, including SPX and IER3, were expressed at significantly lower levels. Genes associated with the p53 pathway and the inflammation mediated by chemokine and cytokine signaling pathway were more highly expressed in cells with HBV genotype A infection, whereas genes associated with CCKR signaling map and oxidative stress response were more highly expressed in cells with HBV genotype C infection.
Conclusion
Several differences in gene expression with respect to HBV genotype A and C infection were detected in human hepatocytes. These differences might be associated with genotypic difference in the clinical course or responsiveness to treatment.
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