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Updated: Aug 24, 2026
Human Pluripotent Stem Cell Based Developmental Toxicity Assays for Chemical Safety Screening and Systems Biology Data Generation
Published on: June 17, 2015
Functional Mapping of Neurodevelopmental Disease Pathways to Key Neurodevelopmental Processes Represented in the
Eliska Kuchovska1, Kristina Bartmann1,2, Georgea Raad1
1IUF - Leibniz Research Institute for Environmental Medicine, Düsseldorf, Germany.
Abstract:
The Developmental Neurotoxicity (DNT) in vitro battery (IVB) enables efficient and human-relevant evaluation of chemicals for DNT potential. To expand its biological applicability domain toward human disease, this study maps neurodevelopmental disorder (NDD)-relevant signaling pathways to key neurodevelopmental processes (KNDPs) using primary human fetal neural progenitor cells (NPCs). Using pharmacological intervention, eighteen NDD pathways are assessed for their impact on seven KNDPs, namely NPC proliferation, radial glia migration, neuronal and oligodendrocyte differentiation and migration, and neurite outgrowth. In total, modulation of sixteen pathways is associated with changes in at least one KNDP. Oligodendrocyte differentiation shows the highest sensitivity (13 pathways), followed by radial glia migration (11 pathways) and NPC proliferation (9 pathways), whereas neuronal migration remains unaffected. Perturbation of the RhoA and mitochondrial complex I pathways is associated with the broadest phenotypic responses, influencing five KNDPs each, while STAT3- and TrkB-related modulation falls outside the assay's applicability domain. Pathway-KNDP associations are integrated into an exemplary interactive physiological map of human oligodendrocyte development, linking mechanistic perturbations to human-relevant biology. Defining which NDD pathways can be functionally probed refines the DNT IVB's biological applicability domain, increases confidence in its protective power, and supports mechanistic interpretation of new approach methodology-based DNT assessment.
Insights
This study maps neurodevelopmental disorder pathways to key developmental processes in human cells. It refines the Developmental Neurotoxicity (DNT) in vitro battery (IVB) for better chemical safety assessment.
Area of Science:
- Neuroscience
- Toxicology
- Developmental Biology
Background:
- The Developmental Neurotoxicity (DNT) in vitro battery (IVB) is crucial for evaluating chemical safety.
- Expanding its scope to human diseases requires mapping neurodevelopmental disorder (NDD)-relevant pathways to key neurodevelopmental processes (KNDPs).
Purpose of the Study:
- To map NDD-related signaling pathways to KNDPs using human neural progenitor cells (NPCs).
- To assess the impact of pharmacological interventions on these pathways and processes.
- To refine the biological applicability domain of the DNT IVB.
Main Methods:
- Utilized primary human fetal neural progenitor cells (NPCs).
- Applied pharmacological interventions to modulate eighteen NDD pathways.
- Assessed effects on seven KNDPs: NPC proliferation, radial glia migration, neuronal and oligodendrocyte differentiation and migration, and neurite outgrowth.
Main Results:
- Sixteen pathways significantly modulated at least one KNDP.
- Oligodendrocyte differentiation was most sensitive (13 pathways), followed by radial glia migration (11) and NPC proliferation (9).
- RhoA and mitochondrial complex I pathways showed the broadest effects (5 KNDPs each).
Conclusions:
- Established functional links between NDD pathways and KNDPs in human cells.
- Developed an interactive map of human oligodendrocyte development.
- Enhanced the DNT IVB's mechanistic interpretation and applicability for NDD risk assessment.
