The long range goal of this project is to explore the toxicological importance of aliphatic epoxides in the metabolism of alkene compounds as well as to study the genotoxicity of these epoxides in their role as laboratory and industrial reagents. In support of this goal it is proposed to continue to study structure-mutagenicity relationships for such epoxides and attempt to develop equations for quantitative structure-activity relationships that would describe the mutagenicity of series of related epoxides. Compounds of interest are (a) polycyclic aromatic alkyl epoxides; (b) styrene oxide derivatives (c) diol epoxides and (d) epoxides related to fecapentaene. These compounds will be tested for mutagenicity with the Ames Salmonella and with mouse lymphocyte culture systems. The base-pair changes upon mutation will be followed by the use of the Salmonella strains designed for that purpose. The epoxides will also followed for their rates of detoxication by the Ames tests, mouse lymphocyte cultures and HPLC in the presence of liver-enzyme systems. The use of lymphocyte cultures from mice treated with epoxides will be evaluated to replace the present use bone-marrow genotoxicity as a method of following in vivo epoxide toxicity. Gene-mutation assays in mice will also be conducted as will be in vivo adduct studies using 32P postlabeling. The purpose being to relate in vivo toxicity to in vitro testing for epoxides.

Agency
National Institute of Health (NIH)
Institute
National Institute of Environmental Health Sciences (NIEHS)
Type
Research Project (R01)
Project #
5R01ES003345-12
Application #
3250569
Study Section
Toxicology Subcommittee 2 (TOX)
Project Start
1983-09-28
Project End
1994-03-31
Budget Start
1992-04-01
Budget End
1994-03-31
Support Year
12
Fiscal Year
1992
Total Cost
Indirect Cost
Name
University of Michigan Ann Arbor
Department
Type
Schools of Pharmacy
DUNS #
791277940
City
Ann Arbor
State
MI
Country
United States
Zip Code
48109
Sinsheimer, J E; Chen, R; Das, S K et al. (1993) The genotoxicity of enantiomeric aliphatic epoxides. Mutat Res 298:197-206
Tan, R S; Chu, E H; Sinsheimer, J E (1993) Molecular analysis of hypoxanthine phosphoribosyl transferase mutants induced by glycidyl 1-naphthyl ether in mouse spleen cells in vivo. Environ Mol Mutagen 22:71-7
Einisto, P; Hooberman, B H; Sinsheimer, J E (1993) Base-pair mutations caused by six aliphatic epoxides in Salmonella typhimurium TA100, TA104, TA4001, and TA4006. Environ Mol Mutagen 21:253-7
Hooberman, B H; Chakraborty, P K; Sinsheimer, J E (1993) Quantitative structure-activity relationships for the mutagenicity of propylene oxides with Salmonella. Mutat Res 299:85-93
Das, L; Das, S K; Chu, E H et al. (1993) Chromosomal aberrations in mouse lymphocytes exposed in vivo and in vitro to aliphatic epoxides. Mutat Res 299:19-24
Chen, R; Nguyen, P; You, Z et al. (1993) Enantioselective detoxication of optical isomers of glycidyl ethers. Chirality 5:501-4
Sinsheimer, J E; Hooberman, B H; Das, S K et al. (1992) Genotoxicity of chryseno[4,5-bcd]thiophene and its sulfone derivative. Environ Mol Mutagen 19:259-64
van den Eeckhout, E; Coene, J; Claereboudt, J et al. (1991) Comparison of the isolation of adducts of 2'-deoxycytidine and 2'-deoxyguanosine with phenylglycidyl ether by high-performance liquid chromatography on a reversed-phase column and a polystyrene-divinylbenzene column. J Chromatogr 541:317-31
Sinsheimer, J E; Giri, A K; Hooberman, B H et al. (1991) Mutagenicity in Salmonella and sister chromatid exchange in mice for 1,4-, 1,3-, 2,4-, and 3,4-dimethylphenanthrenes. Environ Mol Mutagen 17:93-7
Giri, A K; Messerly, E A; Chakraborty, P K et al. (1990) DNA strand breaks in liver for four aliphatic epoxides in mice. Mutat Res 242:187-94

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