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Exploratory microarray analysis of liver tissues from four mouse genotypes with spontaneous hepatitis-associated transcriptional alterations

ABSTRACT: Gene-expression profiling was performed to explore genotype-associated transcriptional alterations in the setting of spontaneous hepatitis. Total RNA extracted from liver tissues of four mouse genotypes (IKKβF/F, IKKβΔhep, Tg, and Tg-IKKβΔhep) was analyzed using the Affymetrix GeneChip Mouse Genome 430 2.0 Array. This dataset was generated as an exploratory reference microarray dataset and was used to identify candidate transcriptional changes for subsequent validation by independent RT-qPCR analyses.

ORGANISM(S): Mus musculus

PROVIDER: GSE324983 | GEO | 2026/04/01

REPOSITORIES: GEO

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Project description:BACKGROUND: Hepatocellular carcinoma (HCC) is a common complication of chronic viral hepatitis. In support of this notion, we have reported that hepatitis B surface antigen (HBsAg)-specific CD8+ T lymphocytes critically contribute to inducing chronic liver cell injury that exerts high carcinogenic potential in a hepatitis B virus (HBV) Tg mouse model. The dynamics of the molecular signatures responsible for hepatocellular carcinogenesis are not fully understood. The current study was designed to determine the serial changes in gene expression profiles in a model of chronic immune-mediated hepatitis. METHODS: Three-month-old HBV Tg mice were immunologically reconstituted with bone marrow cells and splenocytes from syngeneic nonTg donors. Liver tissues were obtained every three months until 18 months at which time all mice developed multiple liver tumors. Nitrative DNA lesions and hepatocyte turnover were assessed immunohistochemically. Gene expression profiles were generated by extracting total RNA from the tissues and analyzing by microarray. RESULTS: The nitrative DNA lesions and the regenerative proliferation of hepatocytes were increased during the progression of chronic liver disease. In a gene expression profile analysis of liver samples, the chemokine- and T cell receptor (TCR)-mediated pathways were enhanced during chronic hepatitis, and the EGF- and VEGF-mediated pathways were induced in HCC. Among these molecules, the protein levels of STAT3 were greatly enhanced in all hepatocyte nuclei and further elevated in the cytoplasm in HCC tissue samples at 18 months, and the levels of phosphorylated TP53 (p-p53-Ser 6 and -Ser 15) were increased in liver tissues. CONCLUSIONS: HBV-specific immune responses caused unique molecular signatures in the liver tissues of chronic hepatitis and triggered subsequent carcinogenic gene expression profiles in a mouse model. The results suggest a plausible molecular basis responsible for HBV-induced immune pathogenesis of HCC.

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Exploratory microarray analysis of liver tissues from four mouse genotypes with spontaneous hepatitis-associated transcriptional alterations

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