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- W3113751704 endingPage "106301" @default.
- W3113751704 startingPage "106301" @default.
- W3113751704 abstract "Predictions from physiologically based toxicokinetic (PBTK) models can help inform human health risk assessment for potentially toxic chemicals in the environment. Bisphenol S (BPS) is the second most abundant bisphenol detected in humans in the United States, after bisphenol A (BPA). We have recently demonstrated that BPS, much like BPA, can cross the placental barrier and disrupt placental function. Differences in physicochemical properties, toxicokinetics, and exposure outcomes between BPA and other bisphenols prevent direct extrapolation of existing BPA PBTK models to BPS. The current study aimed to develop pregnancy-specific PBTK (p-PBTK) models for BPA and BPS, using a common p-PBTK model structure. Novel paired maternal and fetal pregnancy data sets for total, unconjugated, and conjugated BPA and BPS plasma concentrations from three independent studies in pregnant sheep were used for model calibration. The nine-compartment (maternal blood, liver, kidney, fat, placenta and rest of body, and fetal liver, blood and rest of body) models simulated maternal and fetal experimental data for both BPA and BPS within one standard deviation for the majority of the experimental data points, highlighting the robustness of both models. Simulations were run to examine fetal exposure following daily maternal exposure to BPA or BPS at their tolerable daily intake dose over a two-week period. These predictive simulations show fetal accumulation of both bisphenols over time. Interestingly, the steady-state approximation following this dosing strategy achieved a fetal concentration of unconjugated BPA to levels observed in cord blood from human biomonitoring studies. These models advance our understanding of bisphenolic compound toxicokinetics during pregnancy and may be used as a quantitative comparison tool in future p-PBTK models for related chemicals." @default.
- W3113751704 created "2021-01-05" @default.
- W3113751704 creator A5040130910 @default.
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- W3113751704 date "2021-02-01" @default.
- W3113751704 modified "2023-10-18" @default.
- W3113751704 title "Pregnancy-specific physiologically-based toxicokinetic models for bisphenol A and bisphenol S" @default.
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- W3113751704 doi "https://doi.org/10.1016/j.envint.2020.106301" @default.
- W3113751704 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7856209" @default.
- W3113751704 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/33360411" @default.
- W3113751704 hasPublicationYear "2021" @default.
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