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- W2151769059 abstract "A physiologically based biokinetic (PBBK) model for the alkenylbenzene safrole in humans was developed based on in vitro- and in silico-derived kinetic parameters. With the model obtained, the time- and dose-dependent formation of the proximate and ultimate carcinogenic metabolites, 1΄-hydroxysafrole and 1΄-sulfooxysafrole in human liver were estimated and compared with previously predicted levels of these metabolites in rat liver. In addition, Monte Carlo simulations were performed to predict interindividual variation in the formation of these metabolites in the overall population. For the evaluation of the model performance, a comparison was made between the predicted total amount of urinary metabolites of safrole and the reported total levels of metabolites in the urine of humans exposed to safrole, which adequately matched. The model results revealed no dose-dependent shifts in safrole metabolism and no relative increase in bioactivation at dose levels up to 100mg/kg body weight/day. Species differences were mainly observed in the detoxification pathways of 1΄-hydroxysafrole, with the formation of 1΄-oxosafrole being a main detoxification pathway of 1΄-hydroxysafrole in humans but a minor pathway in rats, and glucuronidation of 1΄-hydroxysafrole being less important in humans than in rats. The formation of 1΄-sulfooxysafrole was predicted to vary 4- to 17-fold in the population (fold difference between the 95th and median, and 95th and 5th percentile, respectively), with the median being three to five times higher in human than in rat liver. Comparison of the PBBK results for safrole with those previously obtained for the related alkenylbenzenes estragole and methyleugenol revealed that differences in 1΄-sulfooxy metabolite formation are limited, being only twofold to fivefold." @default.
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- W2151769059 date "2012-05-14" @default.
- W2151769059 modified "2023-10-10" @default.
- W2151769059 title "Physiologically Based Biokinetic (PBBK) Modeling of Safrole Bioactivation and Detoxification in Humans as Compared With Rats" @default.
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- W2151769059 doi "https://doi.org/10.1093/toxsci/kfs174" @default.
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