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  • Title: [Urethane inhibition of DNA synthesis in the hepatocytes of the regenerating liver in mice].
    Author: Faktor VM.
    Journal: Tsitologiia; 1985 Oct; 27(10):1145-9. PubMed ID: 4071660.
    Abstract:
    Hepatocarcinogen urethane (ethyl carbamate) inhibits DNA synthesis in the regenerating mice liver when administered at the peak of stimulated proliferation--46 hours after partial hepatectomy. The inhibition is temporary and reversible. The maximum inhibition of 3H-thymidine incorporation in the cells is observed 12 hours after urethane administration, and the effect is removed following 20 hours after administration. Another effect of urethane consists in the lengthening of the period of DNA synthesis by 1.38 times, as estimated by the Quastler-Sherman method, though it does not affect the length of G2-period or mitosis. Possible mechanisms of the effect of urethane on the initiation of DNA synthesis and on the rate of DNA replication are discussed.
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