PMID: 6987499Feb 1, 1980Paper

Molecular dosimetry of the chemical mutagen ethyl methanesulfonate: quantitative comparison of mutation induction in Escherichia coli, V79 Chinese hamster cells and L5178Y mouse lymphoma cells, and some cytological results in vitro and in vivo

Mutation Research
C S AaronB W Glickman

Abstract

Molecular dosimetry studies were carried out to measure the extent of binding of radio-labeled ethyl groups to the DNA of Escherichia coli, V79 Chinese hamster cells and L5178Y mouse lymphoma cells treated with ethyl methanesulfonate (EMS). The results show that (1) the amount of ethylation of the DNA is similar in these cells when treatment conditions are identical, (2) the relationship between dose to DNA (ethylations per nucleotide) versus exposure (mM applied concentration) is non-linear in the sense that less alkylation of the DNA is observed at the higher exposures than would be predicted on the basis of proportionality between dose to DNA and exposure, and (3) the non-linearity of the genetic response in the bacterial cells is not reflected in a non-linearity of the alkylation of the DNA in those cells. Quantitative comparison of the frequencies of gene mutations in the various systems shows that the mutation frequency per unit of DNA alkylation is heterogeneous among the mammalian cell systems and that the frequencies observed in the bacterial cells fall within the range observed with mammalian cells. Alkylation of the DNA in the bone marrow, testis and liver of Swiss random-bred mice was also measured. The results supp...Continue Reading

Citations

Jan 1, 1985·Environmental Mutagenesis·F H Sobels
Apr 4, 2017·Environmental and Molecular Mutagenesis·T MaischS Karrer
Jan 1, 1984·Environmental Mutagenesis·U GrafP G Kale
Sep 1, 1981·Mutation Research·G R Mohn
Sep 1, 1991·Mutation Research·D B McGregorW J Caspary

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