Abstract
Six-week-old rasH2 mice were injected intraperitoneally with N-diethylnitrosamine (DEN) after partial hepatectomy and administrated 0 or 6,000 ppm troglitazone (TRG) for 10 weeks. Relative liver weight of females increased significantly in the DEN + TRG group compared to the DEN-alone group. The numbers of γ-glutamyltranspeptidase- and proliferating cell nuclear antigen (PCNA)-positive cells tended to increase in both the sexes in the DEN + TRG group; however, these changes were not significantly different from those in the DEN-alone group. Levels of gene expressions for vascular endothelial growth factor (VEGF) and VEGFB (related to angiogenesis), tropomyosin 1 (Tpm1) and transforming growth factor-β (related to ras/MAPK cascade activation), and PCNA (related to cell proliferation) in females were significantly higher in the DEN + TRG than in the untreated control group but not in the DEN-alone group. Only Tpm1 gene had significantly higher expression in the DEN + TRG group than in the DEN-alone group. These results suggest that rasH2 mice are not susceptible to TRG in a two-stage hepatocarcinogenesis model.
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Jin, M., Saekusa, Y., Dewa, Y. et al. Hepatocarcinogenic susceptibility of rasH2 mice to troglitazone in a two-stage hepatocarcinogenesis model. Arch Toxicol 83, 173–181 (2009). https://doi.org/10.1007/s00204-008-0335-5
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DOI: https://doi.org/10.1007/s00204-008-0335-5