PMID: 3057364Dec 1, 1988Paper

Mechanisms of inhibition of N-nitroso compounds-induced mutagenicity

Mutation Research
T Gichner, J Velemínský


In this review we describe the mechanisms of the inhibitory effects of various chemical agents towards the mutagenicity of N-nitroso compounds, including direct-acting mutagens such as N-nitroso derivatives of alkylureas, alkylnitroguanidines and alkylurethanes, and promutagenic nitrosamines. Possible mechanisms by which the inhibitors may exert their effects outside and inside the target cells include chemical and enzymatic deactivation of the mutagen, inhibition of metabolic activation of nitrosamines, scavenging mutagenic products, inhibition of cellular uptake, induction of detoxifying mechanisms, protecting nucleophilic centers in DNA and modulating DNA repair.


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