Archives of Toxicology

, Volume 72, Issue 1, pp 17–25

A quantitative property-property relationship (QPPR) approach to estimate in vitro tissue-blood partition coefficients of organic chemicals in rats and humans

  • Joost DeJongh
  • Henk J. M. Verhaar
  • Joop L. M. Hermens
TOXICOKINETICS

DOI: 10.1007/s002040050463

Cite this article as:
DeJongh, J., Verhaar, H. & Hermens, J. Arch Toxicol (1997) 72: 17. doi:10.1007/s002040050463

Abstract

The present study describes quantitative property-property relationships (QPPRs) for the partitioning of organic chemicals between blood and tissue homogenates from both rats and humans. The n-octanol/water partition coefficient (Kow) is used as a non-biological descriptor. QPPRs for human tissue-blood partition coefficients (PCs) were derived from a dataset of 24 volatile organic compounds in blood, liver, muscle, fat, kidney and brain tissue homogenates. QPPRs were also derived for the PCs of rat tissues, using a dataset of 42 volatile organic compounds in blood, liver, muscle and fat tissue homogenates. These QPPRs were evaluated using a test set of 10 compounds for human tissues and a test set of 14 compounds for rat tissues. For both human and rat test sets, it was generally observed that most estimated PCs were within a range of 50–200% of their experimental values. The present approach is concluded to offer a rapid means for the estimation of tissue-blood PCs of compounds on the basis of Kow values. In addition, indications for a possible role of tissue components other than lipid and water in the tissue-blood partitioning process of compounds were observed from the calibration results of the model.

Key words Partition coefficientsPhysiologically based-pharmacokinetics (PB-PK)DistributionModelling

Copyright information

© Springer-Verlag Berlin Heidelberg 1997

Authors and Affiliations

  • Joost DeJongh
    • 1
  • Henk J. M. Verhaar
    • 1
  • Joop L. M. Hermens
    • 1
  1. 1.Research Institute of Toxicology (RITOX), P.O. Box 80.176, 3508 TD Utrecht, The NetherlandsNL