Epigenetic mechanisms in developmental neurotoxicity

Area of Science:

• Environmental epigenetics
• Neurodevelopmental science
• Toxicology

Background:

• The epigenome, encompassing chromatin and noncoding RNAs, interacts with environmental factors.
• Epigenetic events modulate gene expression in response to environmental changes.
• Adverse prenatal exposures can disrupt normal neurodevelopment through epigenetic mechanisms.

Purpose of the Study:

• To review the neurodevelopmental implications of adverse prenatal exposures.
• To emphasize the mechanistic and functional aspects of environmental impacts on the epigenome.
• To explore the potential of epigenetic modifications as biomarkers.

Main Methods:

• Review of existing literature on environmental epigenetics and neurodevelopment.
• Focus on neurotoxic insults such as methylmercury, lead, arsenic, cadmium, and excess glucocorticoids.
• Analysis of mechanistic and functional consequences of these exposures.

Main Results:

• Neurotoxic insults negatively affect epigenetics, impairing nervous system development.
• Specific environmental toxins (methylmercury, lead, arsenic, cadmium, glucocorticoids) are linked to adverse neurodevelopmental outcomes.
• Individual susceptibility to epigenetic changes varies.

Conclusions:

• Adverse prenatal environments can lead to lasting epigenetic changes impacting neurodevelopment.
• Further research is needed to validate epigenetic modifications as biomarkers for early diagnosis.
• Epigenetic biomarkers could aid in predicting and monitoring treatment responses for neurodevelopmental disorders.