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Chloroform, dichloromethane, and toluene are primarily metabolized in liver by CYP2E1, producing reactive electrophilic metabolites, and may also produce oxidative stress via the uncoupled CYP2E1 catalytic cycle. Additionally, GSTT1 also participates in dichloromethane activation. Despite the oxidative metabolism of these compounds and the production of oxidative adducts, their genotoxicity in the bone marrow micronucleus test is unclear. The objective of this work was to analyze whether the oxidative metabolism induced by the coexposure to these compounds would account for increased micronucleus frequency. We used an approach including the analysis of phase I, phase II, and antioxidant enzymes, oxidative stress biomarkers, and micronuclei in bone marrow (MNPCE) and hepatocytes (MNHEP). Rats were administered different doses of an artificial mixture of CLF\/DCM\/TOL, under two regimes. After one administration MNPCE frequency increased in correlation with induced GSTT1 activity and no oxidative stress occurred. Conversely, after three-day treatments oxidative stress was observed, without genotoxicity. The effects observed indicate that MNPCE by the coexposure to these VOCs could be increased via inducing the activity of metabolism enzymes.<\/jats:p>","DOI":"10.1155\/2014\/425070","type":"journal-article","created":{"date-parts":[[2014,5,19]],"date-time":"2014-05-19T05:15:08Z","timestamp":1400476508000},"page":"1-13","source":"Crossref","is-referenced-by-count":7,"title":["Micronuclei in Bone Marrow and Liver in relation to Hepatic Metabolism and Antioxidant Response due to Coexposure to Chloroform, Dichloromethane, and Toluene in the Rat Model"],"prefix":"10.1155","volume":"2014","author":[{"given":"Javier","family":"Belmont-D\u00edaz","sequence":"first","affiliation":[{"name":"Departamento de Medicina Gen\u00f3mica y Toxicolog\u00eda Ambiental, Instituto de Investigaciones Biom\u00e9dicas, Universidad Nacional Aut\u00f3noma de M\u00e9xico, Apartado Postal 70228, 04510 M\u00e9xico, DF, Mexico"},{"name":"Departamento de Bioqu\u00edmica, Instituto Nacional de Cardiolog\u00eda Ignacio 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