A physiologically-based pharmacokinetic model for disposition of 2,3,7,8-TCDD in fathead minnow and medaka
Environmental Toxicology and Chemistry, ISSN: 1552-8618, Vol: 33, Issue: 5, Page: 1064-1071
2014
- 15Citations
- 13Captures
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Metrics Details
- Citations15
- Citation Indexes14
- 14
- CrossRef13
- Policy Citations1
- 1
- Captures13
- Readers13
- 13
Article Description
A physiologically-based pharmacokinetic model was developed for the disposition of 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TCDD) in 2 fish species-fathead minnow and medaka. The model was developed based on the empirical data on disposition of dioxins in fish tissues, as well as existing knowledge on the mechanisms of uptake, distribution, storage, and elimination of dioxins in various species (other than fish). The present study examined the applicability of mechanisms known to occur in other species for fish and concluded that the same mechanisms defined for disposition of 2,3,7,8-TCDD in (mostly) rodents can be applicable for the 2 fish species examined as well. Parameter values for the model were selected and/or calibrated using available databases. Model compartments included the gill, kidney, liver, and other richly-perfused tissues, as well as fat and other slowly-perfused tissues. The model was calibrated using 2 independent datasets for exposure of fathead minnow and medaka to 2,3,7,8-TCDD in water. The initial values of the model parameters were selected from several sources, and calibrated to represent the 2 exposure datasets. With very few exceptions, the estimated parameter values for the 2 species were comparable, and the final predictions were in strong agreement with the observations. The model developed in the present study can therefore be used in the prediction of the body burden of 2,3,7,8-TCDD in fathead minnow and medaka. Uncertainty in the model prediction as a result of variability in input parameters is discussed for the parameters with the highest impacts on the model outcome. © 2013 SETAC.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84899082971&origin=inward; http://dx.doi.org/10.1002/etc.2504; http://www.ncbi.nlm.nih.gov/pubmed/24375498; https://academic.oup.com/etc/article/33/5/1064/7761198; https://dx.doi.org/10.1002/etc.2504; https://setac.onlinelibrary.wiley.com/doi/10.1002/etc.2504
Oxford University Press (OUP)
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