PMID: 5910014Apr 1, 1966

Liver carcinogenesis by diethylnitrosamine in the rat

Science
M F RajewskyH Frankenberg

Abstract

Diethylnitrosamine was continuously administered to rats at a dose rate of low toxicity. Ninety-two percent of the animals died with multicentrical hepatocellular carcinomata within a narrow and highly reproducible time interval. Discontinuing the carcinogen during the experiment resulted in a prolonged median time until death, a reduced tumor yield, and a lessened slope of the dose-response curve. Partial hepatectomy after discontinuation of the drug did not change either tumor yield or time of death. The obtained dose-response relationships support the concept that carcinogenic effects of single doses are irreversible and cumulative. Daily, low-dose, total-body x-irradiation had no significant effect on the response of rat liver to the carcinogen.

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Related Concepts

Alkylation
Tumor Promoters
Hepatectomy
Malignant Neoplasm of Liver
Decline, Mortality
Nitrosamines
Effects of Radiation

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