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  • Title: Activation of a ribosomal protein S6 kinase during the 4-dimethylaminoazobenzene-induced rat hepatocarcinogenesis.
    Author: Comolli R, Alberti P, Frigerio M.
    Journal: Cancer Lett; 1988 Aug 30; 41(3):281-5. PubMed ID: 3136911.
    Abstract:
    During the induction of 4-dimethylaminoazobenzene (DAB) hepatocarcinogenesis there was a progressive increase in the activity of a kinase which specifically phosphorylated S6 ribosomal protein in vitro. Liver tumour tissue (hepatocellular carcinoma and cholangioma) showed maximal activation of this kinase and elevated levels of S6 phosphorylation. Control rats fed with the same diet containing no dye showed a gradual decline of this activity, with low or lacking phosphorylation at the end of the experimental regimen, suggesting close correlation between tumor cell growth and phosphorylation of this ribosomal protein, under these conditions.
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