Epigenetics and Environmental Exposures in Early Neurodevelopment: Implications for Pediatric Neurological Disorders

Area of Science:

• Neuroscience
• Genetics
• Environmental Health

Background:

• Pediatric neurological disorders, including autism spectrum disorder (ASD) and attention-deficit/hyperactivity disorder (ADHD), result from complex genetic and environmental interactions.
• Epigenetic mechanisms, such as DNA methylation and histone modification, are key mediators of how early-life exposures influence brain development.

Purpose of the Study:

• To review recent studies on the link between early environmental exposures and epigenetic alterations in pediatric neurological disorders.
• To synthesize findings from human cohorts and animal models to understand mechanisms disrupting neurodevelopment.

Main Methods:

• Systematic review of 48 recent studies.
• Analysis of human cohort and animal model data.
• Focus on epigenetic mechanisms (DNA methylation, histone modification, non-coding RNAs).

Main Results:

• Prenatal stress, maternal nutrition, endocrine disruptors, and air pollution are linked to epigenetic alterations.
• These alterations disrupt critical neurodevelopmental processes: neurogenesis, synaptic plasticity, and neural differentiation.
• Epigenetic modifications mediate the impact of environmental factors on brain development.

Conclusions:

• Early environmental exposures can induce persistent epigenetic changes affecting neurodevelopment.
• Epigenetic mechanisms provide insights into the etiology of pediatric neurological disorders.
• Potential for early screening and epigenetic interventions in pediatric neurology exists.