Epigenetic mechanisms in nanomaterial-induced toxicity

Area of Science:

• Environmental Health Sciences
• Toxicology
• Molecular Biology

Background:

• Nanomaterial (NM) applications are expanding across medicine, industry, and consumer products, leading to increased human exposure.
• While NM cytotoxicity and genotoxicity are documented, their epigenetic effects remain largely unexplored.
• Epigenetic mechanisms, including DNA methylation, histone modification, and miRNA expression, are critical in cellular function and disease.

Purpose of the Study:

• To comprehensively review the epigenetic mechanisms underlying engineered NM-induced toxicity.
• To compare NM-induced epigenetic changes with those caused by smaller particles.
• To identify knowledge gaps and suggest future research directions in NM epigenetic toxicology.

Main Methods:

• Literature review of in vitro and in vivo studies on NM toxicity and epigenetics.
• Analysis of studies investigating DNA methylation, histone modification, and miRNA expression changes upon NM exposure.
• Comparative analysis of epigenetic effects across different particle sizes.

Main Results:

• Engineered nanomaterials can induce epigenetic alterations, contributing to their toxicological profile.
• Evidence suggests similarities in epigenetic responses between nanomaterials and smaller particles.
• Significant gaps exist in understanding the specific epigenetic pathways affected by various NMs.

Conclusions:

• Epigenetic mechanisms are a key, yet underappreciated, factor in nanomaterial toxicity.
• Further research is essential to elucidate NM-induced epigenetic changes and their health implications.
• Standardized methodologies are needed to advance the field of NM epigenetic toxicology.