New urinary adenine adducts, 3-(2-hydroxy-1-phenylethyl)adenine (N3alphaA), 3-(2-hydroxy-2-phenylethyl)adenine (N3betaA), were found in the urine of mice exposed to styrene vapour. These styrene 7,8-oxide derived adenine adducts as well as previously identified guanine adducts, 7-(2-hydroxy-1-phenylethyl)guanine (N7alphaG) and 7-(2-hydroxy-2-phenylethyl)guanine (N7betaG) were quantified by HPLC-ESI-MS(2) and the excretion profile during and after a repeated exposure to 600mg/m(3) or 1200mg/m(3) of styrene for 10 consecutive days (6h/day) was determined. The excretion was dose dependent. Total N3 adenine adducts (N3alphaA+N3betaA) excreted amounted to nearly 0.8x10(-5)% of the absorbed dose while urinary N7 guanine adducts (N7alphaG+N7betaG) amounted to nearly 1.4x10(-5)% of the dose. No accumulation of the adducts was observed. Due to rapid depurination from the DNA, the excretion of both N3 adenine and N7 guanine adducts ceased shortly after finishing the exposure. Both N3 adenine and N7 guanine adducts may be used as non-invasive biomarkers of effective dose reflecting only a short time exposure to styrene.
- MeSH
- adenin analogy a deriváty moč MeSH
- adukty DNA analýza moč MeSH
- aplikace inhalační MeSH
- financování organizované MeSH
- guanin analogy a deriváty moč MeSH
- myši MeSH
- styren aplikace a dávkování metabolismus MeSH
- vysokoúčinná kapalinová chromatografie MeSH
- zvířata MeSH
- Check Tag
- mužské pohlaví MeSH
- myši MeSH
- zvířata MeSH
- MeSH
- chromozomální aberace MeSH
- inhalační expozice MeSH
- lidé MeSH
- myši MeSH
- potraviny MeSH
- styren aplikace a dávkování metabolismus škodlivé účinky MeSH
- testy genotoxicity MeSH
- vystavení vlivu životního prostředí MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- myši MeSH
- zvířata MeSH
- Publikační typ
- přehledy MeSH
- srovnávací studie MeSH
