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Related Experiment Videos

Activity profiles of developmental toxicity: design considerations and pilot implementation.

R J Kavlock1, J A Greene, G L Kimmel

  • 1US Environmental Protection Agency, Research Triangle Park, North Carolina.

Teratology
|February 1, 1991
PubMed
Summary

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This study compiled quantitative developmental toxicity data for five model compounds across various in vitro and in vivo assays. The findings enable comparison of assay results, identification of data gaps, and evaluation of structure-activity relationships for developmental toxicants.

Area of Science:

  • Toxicology
  • Developmental Biology
  • Pharmacology

Background:

  • Developmental toxicity testing is crucial for risk assessment.
  • Standardized data compilation across diverse assays is lacking.
  • Five model compounds (cyclophosphamide, methotrexate, hydroxyurea, caffeine, ethylenethiourea) are widely used in developmental toxicity studies.

Purpose of the Study:

  • To systematically search and compile quantitative developmental toxicity data for five model compounds.
  • To establish a framework for comparing results from in vitro and in vivo assays.
  • To identify data gaps and evaluate assay concordance in developmental toxicology.

Main Methods:

  • Literature search for quantitative test results from in vitro and in vivo developmental toxicity assays.

Related Experiment Videos

  • Inclusion of nine cellular assays, six whole embryo culture assays, and mammalian Segment II/abbreviated exposure tests.
  • Development of a computerized reference file with critical endpoints, quantitative data (e.g., IC50, HID, LED), and qualitative results.

    • Main Results:

    • Quantitative and qualitative developmental toxicity data were extracted and compiled for the five model compounds.
    • A system for plotting and displaying assay results across multiple test systems was developed.
    • The compiled data facilitates comparison of results, identification of data gaps, and evaluation of assay concordance.

    Conclusions:

    • The developed database and profiles enable comprehensive comparison of developmental toxicity data across diverse assay systems.
    • This resource aids in identifying research gaps and evaluating the reliability of different toxicity assays.
    • The compiled information supports structure-activity relationship analyses for developmental toxicants.