Pervasive environmental chemicals impair oligodendrocyte development.

Area of Science:

• Neuroscience
• Toxicology
• Environmental Health

Background:

• Oligodendrocyte development is crucial for neurodevelopment and extends into adulthood.
• Environmental chemical exposure poses potential risks to oligodendrocytes, yet few have been assessed.
• Understanding these risks is vital for public health and neurodevelopmental outcomes.

Purpose of the Study:

• To identify environmental chemicals that disrupt oligodendrocyte development.
• To elucidate the distinct mechanisms by which these chemicals affect oligodendrocyte maturation.
• To assess the in vivo and in vitro impact of identified chemicals on neurodevelopment.

Main Methods:

• High-throughput screening of environmental chemicals in cultured cells.
• Utilizing cell cultures, mouse models, and a human 3D organoid model for prenatal cortical development.
• Analyzing epidemiological data to correlate chemical exposure with neurodevelopmental outcomes.

Main Results:

• Quaternary compounds were found to be cytotoxic to developing oligodendrocytes.
• Organophosphate flame retardants were identified to prematurely arrest oligodendrocyte maturation.
• Both chemical classes impaired oligodendrocyte development in vivo and in human organoid models, with epidemiological links to adverse neurodevelopmental outcomes.

Conclusions:

• Environmental chemicals, specifically quaternary compounds and organophosphate flame retardants, pose significant risks to oligodendrocyte development.
• Distinct mechanisms of toxicity were identified for each chemical class.
• Further investigation into these compounds' impact on human neurodevelopment is warranted.