Title
The use of in vitro toxicity data and physiologically based kinetic modeling to predict dose-response curves for in vivo developmental toxicity of glycol ethers in rat and man
Author
Louisse, J.
de Jong, E.
van de Sandt, J.J.M.
Blaauboer, B.J.
Woutersen, R.A.
Piersma, A.H.
Rietjens, I.M.C.M.
Verwei, M.
TNO Kwaliteit van Leven
Publication year
2010
Abstract
At present, regulatory assessment of systemic toxicity is almost solely carried out using animal models. The European Commission's REACH legislation stimulates the use of animal-free approaches to obtain information on the toxicity of chemicals. In vitro toxicity tests provide in vitro concentration-response curves for specific target cells, whereas in vivo dose-response curves are regularly used for human risk assessment. The present study shows an approach to predict in vivo dose-response curves for developmental toxicity by combining in vitro toxicity data and in silico kinetic modeling. A physiologically based kinetic (PBK) model was developed, describing the kinetics of four glycol ethers and their embryotoxic alkoxyacetic acid metabolites in rat and man. In vitro toxicity data of these metabolites derived in the embryonic stem cell test were used as input in the PBK model to extrapolate in vitro concentration-response curves to predicted in vivo dose-response curves for developmental toxicity of the parent glycol ethers in rat and man. The predicted dose-response curves for rat were found to be in concordance with the embryotoxic dose levels measured in reported in vivo rat studies. Therefore, predicted dose-response curves for rat could be used to set a point of departure for deriving safe exposure limits in human risk assessment. Combining the in vitro toxicity data with a human PBK model allows the prediction of dose-response curves for human developmental toxicity. This approach could therefore provide a means to reduce the need for animal testing in human risk assessment practices. © The Author 2010. All rights reserved.
Subject
Nutrition
Biomedical Research
Benchmark dose
Developmental toxicity
Embryonic stem cell test
Glycol ethers
Physiologically based kinetic modeling
To reference this document use:
http://resolver.tudelft.nl/uuid:4e87486d-c4be-4825-89c8-27a96fa780f4
TNO identifier
425478
ISSN
1096-6080
Source
Toxicological Sciences, 118 (2), 470-484
Article number
No.: kfq270
Document type
article