Human-Induced Pluripotent Stem Cell-Derived Neural Organoids as a Novel In Vitro Platform for Developmental...

Area of Science:

• Neuroscience
• Toxicology
• Stem Cell Biology

Background:

• There is a growing need for in vitro toxicity testing models that replace traditional in vivo studies.
• Existing in vitro models lack the controlled cell-cell interactions and sensitivity required for accurate chemical toxicity prediction.
• Human induced pluripotent stem cell (iPSC)-derived neural organoids present a promising platform for modeling human brain development.

Purpose of the Study:

• To develop and validate a novel in vitro tool using iPSC-derived neural organoids for studying and predicting chemical-induced human toxicity.
• To assess the utility of this organoid model in evaluating the effects of specific chemicals, such as pesticides, on neural development and cell viability.

Main Methods:

• Generation of neural organoids from various human iPSC lines.
• Characterization of organoid neurodevelopmental features and reproducibility.
• Exposure of organoids to varying concentrations of pesticides (rotenone and chlorpyrifos).
• Assessment of cellular responses, including apoptosis and morphological changes.

Main Results:

• The iPSC-derived neural organoid model demonstrated key neurodevelopmental features and high reproducibility.
• Basic fibroblast growth factor was identified as crucial for embryoid body formation and neural network development.
• Exposure to low rotenone concentrations induced greater apoptosis than high concentrations.
• Chlorpyrifos exposure at low doses led to observable morphological changes in neural progenitor cells.

Conclusions:

• The developed neural organoid system effectively mimics human brain and nerve developmental processes.
• This model serves as a valuable tool for evaluating drug efficacy, safety, and toxicity, particularly for low-dose chemical exposures.
• The findings support the use of iPSC-derived neural organoids as a viable alternative to in vivo toxicity testing.