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  • Title: [Mechanism of methylation of DNA bases by symmetrical dimethylhydrazine].
    Author: Likhachev AIa, Petrov AS, P'rvanova LG, Pozharisskiĭ KM.
    Journal: Biull Eksp Biol Med; 1978 Dec; 86(12):679-81. PubMed ID: 728607.
    Abstract:
    The effect of disulfiram on the alkylation of purine bases of the liver and colon DNA in rats exposed to 1,2-dimethyl-hydrazine-3H has been studied. The pretreatment of rats with disulfiram which inhibits the DMH N-oxydation was found to prevent the methylation of guanine with DMH. However, the radioactivity was readily incorporated into normal (non-methylated) purine bases during synthesis. The lack of DNA methylation in animals pretreated with disulfiram indicated carbonium ion rather than methyl radical to alkylate DNA.
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