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  • Title: Effect of a single treatment with the alkylating carcinogens dimethynitrosamine, diethylnitrosamine and methyl methanesulphonate, on liver regenerating after partial hepatectomy. I. Test for induction of liver carcinomas.
    Author: Craddock VM.
    Journal: Chem Biol Interact; 1975 May; 10(5):313-21. PubMed ID: 166761.
    Abstract:
    A single injection of dimethylnitrosamine (DMN), 12.0-15.6 mg-kg, given to 100 g female rats 24 h after partial hepatectomy, induced hepatocellular carcinoma. No animals receiving DMN without partial hepatectomy developed liver carcinomas. Previous evidence had suggested that the incidence of tumours was highest when DMN was administered during the wave of DNA replication which follows partial hepatectomy. The present experiments made this suggestive evidence statistically significant. A single treatment with diethylnitrosamine (DEN) induced liver cell cancer when given to intact or to partially hepatectomised rats. No tumors developed when another alkylating carcinogen, methyl methanesulphonate (MMS), was administered after partial hepatectomy. The significance of these results in relation to the mechanism of initiation of carcinogenesis is discussed.
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