作者: J.P. Teixeira , J. Gaspar , J. Roma-Torres , S. Silva , C. Costa
DOI: 10.1016/J.TOX.2007.04.019
关键词: Glutathione 、 Epoxide 、 Monooxygenase 、 Biochemistry 、 Valine 、 Epoxide hydrolase 、 Styrene 、 Styrene oxide 、 Cytochrome P450 、 Chemistry
摘要: Abstract Styrene is one of the most important organic chemicals used worldwide. In humans, styrene metabolism involves oxidation by cytochrome P450 monooxygenases (CYPs) to styrene-7,8-oxide, an epoxide thought be responsible for genotoxic effects exposure, and detoxification means hydrolase (mEH) glutathione S -transferases (GSTs). The objective this study was investigate if genetic polymorphisms metabolic enzymes modulate level urinary metabolites oxide adducts with N-terminal valine human globin (SO-Hb) in 75 workers occupationally exposed 77 unexposed controls. mean air concentration breathing zone (30.4 ppm) higher than threshold limit value 20 ppm recommended American Conference Governmental Industrial Hygienists (ACGIH), biological exposure index adopted ACGIH prior next shift (MA + PGA = 400 mg/g creatinine) exceeded, indicating that group recommended. A highly significant correlation observed between MA + PGA urine ( r = 0.85, P