Expression of oncogenes and tumor suppressor genes in human hepatocellular carcinoma and hepatoblastoma cell lines. |
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Authors: | M Farshid E Tabor |
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Affiliation: | National Cancer Institute, National Institutes of Health, Bethesda, MD 20892. |
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Abstract: | The expression of nine oncogenes (c-myc, N-myc, N-ras, H-ras, k-ras, abl, fos, src, and raf) and two tumor suppressor genes (p53 and RB) were studied by northern blot hybridization in six human hepatocellular carcinoma or hepatoblastoma cell lines (PLC/PRF/5, Hep3B, Hep G2, 2.2.15, HLE, and HLF) and in a human embryonic lung fibroblast cell line (WI-38) to look for differences that might be associated with the presence (PLC/PRF/5, Hep3B, and 2.2.15) or absence (Hep G2, HLE, and HLF) of integrated hepatitis B virus (HBV) DNA. The levels of expression of the oncogenes and tumor suppressor genes were unrelated to the presence or absence of integrated HBV-DNA. Furthermore, the intensity of expression of these oncogenes was no greater in the 2.2.15 cell line (consisting of Hep G2 cells transfected with hepatitis B virus) than in untransfected Hep G2 cells. |
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Keywords: | Hepatitis B virus hepatoblastoma hepatocellular carcinoma oncogene tumor suppressor gene |
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