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Related Experiment Videos

Multilayered dermal subcompartments for modeling chemical absorption

R L Bookout1, C R McDaniel, D W Quinn

  • 1Air Force Institute of Technology, Wright-Patterson AFB, OH 45433, USA.

SAR and QSAR in Environmental Research
|January 1, 1996
PubMed
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New physiologically-based pharmacokinetic (PBPK) skin models predict chemical blood concentrations from dermal exposure. These models enhance early exposure predictions and identify key factors influencing chemical penetration through the skin.

Area of Science:

  • Pharmacology
  • Toxicology
  • Environmental Science

Background:

  • Dermal penetration of chemicals and drugs is critical for toxicologists and pharmacologists.
  • Environmental professionals and drug developers utilize predictive mathematical models to understand skin penetration.
  • Physiologically-based pharmacokinetic (PBPK) models offer predictive capabilities when based on measurable parameters.

Purpose of the Study:

  • To develop and validate two novel PBPK skin models.
  • To predict blood concentrations of dibromomethane in rats following dermal vapor exposure.
  • To improve the accuracy of predictions, especially during the initial phase of exposure.

Main Methods:

  • Development of two new physiologically-based pharmacokinetic (PBPK) skin models.

Related Experiment Videos

  • Application of models to predict blood concentrations of dibromomethane in rats after skin-only vapor exposure.
  • Conducting sensitivity analysis to identify influential model parameters.

    • Main Results:

    • The new PBPK models improved predictions of blood concentrations, particularly at the beginning of exposure.
    • Sensitivity analysis indicated that permeability constants and partition coefficients most significantly impact predictions.
    • The models provide a basis for understanding and predicting chemical and drug concentrations within the skin.

    Conclusions:

    • The developed PBPK skin models enhance the prediction of chemical uptake via dermal exposure.
    • These models can aid in extrapolating chemical or drug penetration across species, doses, and durations.
    • Further validation can lead to improved risk assessments and drug development strategies for dermal exposure.