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Mutagenicity of aryl propylene and butylene oxides with salmonella
L B Rosman1, V Gaddamidi, J E Sinsheimer
1College of Pharmacy, University of Michigan, Ann Arbor 48109-1065.
Abstract:
10 aryl propylene oxides and 6 aryl butylene oxides were synthesized. Dose-mutagenicity relationships were studied for these compounds and for 1,2-epoxybutane, using both the preincubation and plate incorporation Ames tests with Salmonella typhimurium strains TA100 and TA1535. Structure-mutagenicity relationships were further examined by concurrent testing at single doses with the plate incorporation assay in strain TA100. In both series of compounds, mutagenicity showed very correlation to chemical reactivity, molar volume and partition values. However, all compounds were mutagenic in at least one system with the propylene oxides being more mutagenic than the corresponding butylene oxide derivatives. The naphthyl derivatives in each series were the most mutagenic.
Insights
Researchers synthesized aryl propylene and butylene oxides to study their mutagenicity. Propylene oxides were generally more mutagenic than butylene oxides, with naphthyl derivatives showing the highest mutagenic activity in Ames tests.
Area of Science:
- Chemical Synthesis
- Toxicology
- Genetics
Background:
- Epoxides are a class of chemical compounds with known mutagenic potential.
- Understanding structure-activity relationships is crucial for predicting and mitigating chemical toxicity.
Purpose of the Study:
- To synthesize novel aryl propylene and butylene oxides.
- To investigate the dose-mutagenicity and structure-mutagenicity relationships of these synthesized epoxides.
- To compare the mutagenic potential of propylene oxides versus butylene oxides.
Main Methods:
- Synthesis of 10 aryl propylene oxides and 6 aryl butylene oxides.
- Utilized the Ames test with Salmonella typhimurium strains TA100 and TA1535.
- Employed both preincubation and plate incorporation assays.
- Examined structure-mutagenicity relationships using single-dose plate incorporation assays.
Main Results:
- All synthesized compounds exhibited mutagenicity in at least one test system.
- Propylene oxide derivatives were found to be more mutagenic than their corresponding butylene oxide analogs.
- Mutagenicity showed limited correlation with chemical reactivity, molar volume, and partition values.
- Naphthyl derivatives within each series demonstrated the highest mutagenic activity.
Conclusions:
- Aryl propylene and butylene oxides are mutagenic, with varying potencies.
- Structural features, particularly the naphthyl group, significantly influence mutagenic activity.
- The study provides valuable insights into epoxide mutagenicity for risk assessment.