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. 1974 Nov;30(5):429–439. doi: 10.1038/bjc.1974.217

Morphological and Biochemical Effects of 1,2-Dimethylhydrazine and 1-Methylhydrazine in Rats and Mice

A Hawks, R M Hicks, J W Holsman, P N Magee
PMCID: PMC2009305  PMID: 4469195

Abstract

Single toxic doses of 1,2-dimethylhydrazine induced mild centrilobular necrosis of the liver in rats and mice. Ultrastructural studies showed hepatic nuclear changes including nucleolar microsegregation and changes in the endoplasmic reticulum and mitochondria. 1-Methylhydrazine caused little morphological change in the liver. Tumours of the colon and kidney and also massive cystic hyperplasia of the liver were found in some of the rats and tumours of the anal margin and kidney in some of the mice, following single doses of 1,2-dimethylhydrazine. Incorporation of amino acids into rat liver proteins was inhibited by 1,2-dimethylhydrazine, which also caused disaggregation of hepatic polysomes. No effects on hepatic protein synthesis by 1,1-dimethylhydrazine or 1-methylhydrazine were observed. Similarities between the effects of 1,2-dimethylhydrazine, cycasin and dimethylnitrosamine are discussed.

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