Particulate matter exposure shapes DNA methylation through the lifespan

Area of Science:

• Environmental Epigenetics
• Molecular Toxicology
• Public Health

Background:

• Airborne particulate matter (PM) exposure is linked to adverse health outcomes.
• DNA methylation is a key epigenetic mechanism influenced by environmental factors.
• PM-induced DNA methylation changes may mediate health effects or adaptation to pollutants.

Purpose of the Study:

• To review recent literature on long- and short-term PM exposure and DNA methylation.
• To focus on how PM affects DNA methylation across different life stages.
• To analyze current evidence on the role of DNA methylation in PM-related health impacts.

Main Methods:

• Literature review of recent studies.
• Analysis of evidence on global and gene-specific DNA methylation.
• Focus on susceptible life stages: pregnancy, childhood, and older age.

Main Results:

• PM exposure significantly modulates DNA methylation patterns.
• These alterations affect crucial biological mechanisms and health.
• Susceptible life stages show marked effects, including pregnancy, childhood, and advanced age.

Conclusions:

• PM exposure impacts DNA methylation, with significant health consequences, especially in vulnerable populations.
• Current evidence is largely from cross-sectional studies; prospective studies are limited.
• Further research is required to explore the reversibility of PM-induced DNA methylation changes.