NADPH-fortified human liver microsomes were examined with regard to ability to detoxicate several chemicals that do not require enzymatic oxidation to elicit a genotoxic response in a Salmonella typhimurium TA1535/pSK1002 system where umu response is used as an indicator of
Dinitropyrenes are mutagenic and carcinogenic environmental pollutants commonly found in diesel exhaust and airborne particulates. In the present study, the ability of rabbit lung to metabolize 1,8-dinitro[4,5,9,10-3H]pyrene by both oxygen-dependent and oxygen-independent pathways has been investigated. Using lung 9000 g
Formation of DNA adducts, following treatment of primary rabbit tracheal epithelial cells (RTEC) with 1,8-dinitropyrene (1,8-DNP) and its partially reduced derivative, 1-nitro-8-nitrosopyrene (1,8-NONO2), was examined using the 32P-post-labelling technique. Treatment of aerobic cells with 1,8-DNP or 1,8-NONO2 produced qualitatively similar
The effects of chronic ethanol feeding of rats on the ability of liver fractions to modulate the bacterial mutagenicity of three dinitropyrene isomers (1,3-, 1,6- and 1,8-DNP), which require bacterial enzymes but not an exogenous enzyme source for activation, were
The carcinogenicities of 1-nitropyrene (1-NP), 4-nitropyrene (4-NP), 1,3-dinitropyrene (1,3-DNP), 1,6-dinitropyrene (1,6-DNP), 1,8-dinitropyrene (1,8-DNP), 3-hydroxy-1-nitropyrene (3-OH-1-NP) and a mixture of 6- and 8-hydroxy-1-nitropyrene (6/8-OH-1-NP) were investigated in newborn female rats. Newborn female CD rats were treated s.c. eight times at weekly
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