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Chemical exposure can harm developing human brains. This review explores alternative assays using stem cells to assess neurodevelopmental endpoints and build a DNT testing battery for chemical safety.

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Area of Science:

  • Neuroscience
  • Developmental Toxicology
  • Stem Cell Biology

Background:

  • Human brain development is a complex process vulnerable to chemical disruption, leading to irreversible neurological impairments.
  • Traditional testing methods for chemical neurodevelopmental toxicity (DNT) are limited.
  • Alternative assays are needed to evaluate chemical impacts on the developing nervous system.

Purpose of the Study:

  • To provide a scientific rationale for selecting specific neurodevelopmental endpoints for alternative assays.
  • To outline the assembly of these assays into a DNT testing battery.
  • To support the development of new approaches for assessing chemical risks to neurodevelopment.

Main Methods:

  • Review of scientific literature on neurodevelopmental endpoints and alternative assay development.
  • Focus on assays utilizing human stem and progenitor cells.
  • Conceptualization of a DNT testing battery composed of distinct assay modules.

Main Results:

  • Identification of key neurodevelopmental endpoints critical for evaluating chemical toxicity.
  • Establishment of a framework for assay development using human stem cells.
  • Proposal for a modular DNT testing battery approach.

Conclusions:

  • Alternative assays utilizing human stem cells can effectively assess critical neurodevelopmental endpoints.
  • A combination of these assays forms a robust DNT testing battery.
  • This approach offers a promising alternative for evaluating chemical safety and protecting neurodevelopment.