Journal
VIRAL IMMUNOLOGY
Volume 23, Issue 5, Pages 467-476Publisher
MARY ANN LIEBERT, INC
DOI: 10.1089/vim.2010.0042
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Funding
- Ministry of Education, Culture, Sports, Science and Technology, Japan [15790338, 21590829, 21590828, 21390225]
- Ministry of Health, Labour and Welfare of Japan
- Ministry of Education, Culture, Sports, Science and Technology, of the Japanese Government
- Chiba University
- Grants-in-Aid for Scientific Research [15790338, 21590828, 21390225] Funding Source: KAKEN
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Disease activities of hepatitis B are affected by the status of hepatitis B e antigen (HBeAg). The function of the hepatitis B virus (HBV) precore or HBeAg is unknown. We assumed that HBeAg blocks aberrant immune responses, although HBeAg is not required for viral assembly, infection, or replication. We examined the interaction of HBeAg and the immune system, including cytokine production. The inflammatory cytokine TNF, IL-6, IL-8, IL-12A, IFN-alpha 1, and IFN-beta mRNA were downregulated in HBeAg-positive HepG2, which stably expresses HBeAg, compared to HBeAg-negative HepG2 cells. The results of real-time RT-PCR-based cytokine-related gene arrays showed the downregulation of cytokine and IFN production. We also observed inhibition of the activation of NF-kappa B-and IFN-beta-promoter in HBeAg-positive HepG2, as well as inhibition of IFN and IL-6 production in HBeAg-positive HepG2 cell culture fluids. HBeAg might modify disease progression by inhibiting inflammatory cytokine and IFN gene expression, while simultaneously suppressing NF-kappa B-signaling- and IFNb-beta promoter activation.
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