Molecular analysis of hprt mutation in B6C3F1 mice exposed to ozone alone and combined treatment of 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone and/or dibutyl phthalate for 32 and 52 weeks.
- Author:
Min Young KIM
1
;
Hyun Woo KIM
;
Jin Hong PARK
;
Jun Sung KIM
;
Hwa JIN
;
Seo Hyun MOON
;
Kook Jong EU
;
Hyun Sun CHO
;
Gami KANG
;
Yoon Shin KIM
;
Young Chul KIM
;
Hae Yeong KIM
;
Ki Ho LEE
;
Myung Haing CHO
Author Information
1. Laboratory of Toxicology, College of Veterinary Medicine and School of Agricultural Biotechnology, Seoul National University, Seoul 151-742, Korea. mchotox@snu.ac.kr
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
Ozone;
NNK;
DBP;
hprt mutation
- MeSH:
Animals;
Carcinogens/*toxicity;
DNA Mutational Analysis;
Dibutyl Phthalate/*toxicity;
Drug Combinations;
Female;
Hypoxanthine Phosphoribosyltransferase/*genetics;
Male;
Mice;
Mutagenicity Tests;
*Mutation/drug effects;
Nitrosamines/*toxicity;
Ozone/*toxicity;
Reverse Transcriptase Polymerase Chain Reaction;
T-Lymphocytes/drug effects/enzymology
- From:Journal of Veterinary Science
2004;5(4):379-385
- CountryRepublic of Korea
- Language:English
-
Abstract:
Potential toxicological interactions of 4-(N-methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and/or dibuthyl phthalate (DBP) on ozone were investigated after 32- and 52-wk exposures using hprt mutation assay. Male and female B6C3F1 mice exposed to ozone (0.5 ppm), NNK (1.0 mg/kg), DBP (5,000 ppm), and two or three combinations of these toxicants 6 h per day for 32- and 52-wk showed increases in the frequencies of TG rlymphocytes compared to the control groups. Additive interactions were noted from two combination groups compared to the ozone alone in both sexes of 32- and 52-wk studies. The most common specific mutation type in the hprt genes of test materials-treated male and female mice was transversion with very few transition. The results indicate that such dominant transversion may be responsible for toxicity and combined exposure to ozone, NNK, and DBP induces additive genotoxicities compared to ozone alone.
