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Related Experiment Videos

Developmental toxicity testing from animal towards embryonic stem cells.

Cristian Pellizzer1, Susanne Bremer, Thomas Hartung

  • 1European Centre for the Validation of Alternative Methods, Institute for Health and Consumer Protection, Joint Research Centre, Ispra, Italy.

ALTEX
|June 15, 2005
PubMed
Summary

In vitro methods using embryonic stem cells show promise for assessing developmental toxicity, including teratogenicity and growth retardation. Adapting these tests for human cells could improve accuracy and address ethical concerns in chemical safety evaluations.

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Area of Science:

  • Developmental toxicology
  • In vitro toxicology
  • Embryonic stem cell research

Background:

  • Developmental toxicity encompasses adverse effects on organism development from prenatal or postnatal exposures.
  • Key manifestations include embryolethality, malformations, growth retardation, and functional impairment.
  • European regulations mandate toxicological evaluations, emphasizing reproductive toxicity and in vitro methods for high-volume chemicals.

Purpose of the Study:

  • To review the efficacy of existing in vitro systems, particularly those using embryonic stem (ES) cells, for detecting embryotoxicity.
  • To focus on specific developmental effects like teratogenicity and growth retardation.
  • To explore the adaptation of mouse ES cell-based tests to human ES cells and discuss ethical considerations.

Main Methods:

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  • Review of current in vitro systems utilizing embryonic stem (ES) cells.
  • Focus on identifying specific developmental toxicity endpoints such as teratogenicity and growth retardation.
  • Discussion on adapting mouse ES cell assays for human applications and ethical implications.

Main Results:

  • Embryonic stem (ES) cell-based in vitro systems demonstrate potential for identifying key developmental toxicity effects.
  • Adaptation to human ES cells could mitigate inter-species variations in toxicity studies.
  • A comprehensive battery of in vitro tests is necessary for regulatory assessment.

Conclusions:

  • In vitro embryonic stem cell assays are valuable tools for assessing developmental toxicity, specifically teratogenicity and growth retardation.
  • Transitioning to human ES cells offers a path to more relevant and ethically sound toxicity testing.
  • Regulatory acceptance requires a multi-test approach to capture the spectrum of developmental toxicity.