Mutation induction in Escherichia coli incubated in the reaction mixture of NADPH-dependent lipid peroxidation of rat-liver microsomes
Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, ISSN: 0027-5107, Vol: 149, Issue: 3, Page: 321-326
1985
- 13Citations
- 3Captures
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Article Description
Experiments were carried out to examine mutation induction in E. coli cells incubated in the reaction mixture of NADPH-dependent lipid peroxidation of microsomes isolated from rat liver. The results obtained were as follows: (1) Lipid peroxidation of microsomes occurred extensively on incubation with NADPH and Fe 2+. In the E. coli WP2 uvrA (pKM101) system, the mutation frequency to streptomycin resistance increased markedly when the cells were incuated in the reaction mixture of microsomal lipid peroxidation. The induced mutation frequencies were dependent on the extent of the lipid peroxidation. (2) It was also found that the mutations were induced at the same rate as in the case (1) when the cells added to the microsomal suspensions after the reactions due to short-lived free radicals had terminated.(3) The cytotoxicity of the lipid peroxidation products was larger in the DNA repair-defective mutant, E. coli SR18 ( uvrArecA ) than the wild-type strain, SR749. From these results it is concluded that some DNA-damaging and mutagenic substances are indeed produced in the degradation process of peroxidized polyunsaturated fatty acids in liver microsomal lipids.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/0027510785901472; http://dx.doi.org/10.1016/0027-5107(85)90147-2; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0022003945&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/3887142; https://linkinghub.elsevier.com/retrieve/pii/0027510785901472; http://dx.doi.org/10.1016/0027-5107%2885%2990147-2; https://dx.doi.org/10.1016/0027-5107%2885%2990147-2
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