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J Natl Cancer Inst. 1978 Sep;61(3):813-7.

Enhancement of DL-ethionine-induced liver carcinogenesis in rats fed a choline-devoid diet.


The effects of a choline-devoid (CD) or a choline-supplemented (CS) diet on the induction of liver tumors in rats by DL-ethionine were investigated. Groups of male outbred Sprague-Dawley rats were fed a plain CD or a plain CS diet, or the same diets containing 0.05% DL-ethionine. Hepatocellular carcinomas developed in 50% of the rats fed the CD+ethionine diet for 14 weeks and in about 80% of the rats fed the same diet for 22-30 weeks. No hepatocellular carcinomas developed in rats fed the CS+ethionine diet, the plain CD diet, or the plain CS diet up to 30 weeks. The findings suggest that a CD diet alters the response of rat liver to DL-ethionine and leads to an early and enhanced induction of hepatocellular carcinoma.

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