Minireview: Epigenomic Plasticity and Vulnerability to EDC Exposures

Area of Science:

• Developmental Biology
• Epigenetics
• Environmental Health

Background:

• The epigenome is dynamically remodeled during development, creating a sensitive window for environmental influences.
• Environmental exposures, particularly endocrine-disrupting compounds (EDCs), can disrupt normal epigenetic processes.
• Such disruptions can lead to long-term health consequences, a phenomenon known as developmental reprogramming.

Purpose of the Study:

• To explore how endocrine-disrupting compounds (EDCs) impact the epigenome during development.
• To elucidate the mechanisms by which EDCs cause developmental reprogramming.
• To understand the long-term implications of EDC-induced epigenetic alterations on disease susceptibility.

Main Methods:

• Review of existing literature on EDC exposure and epigenetic modifications.
• Analysis of studies investigating DNA methylation and histone modifications in response to EDCs.
• Examination of identified molecular mechanisms underlying EDC-induced epigenomic reprogramming.

Main Results:

• EDCs can alter DNA methylation and histone modifications during critical developmental periods.
• Mechanisms include changes in methyl donor availability, imprinting, dioxygenase activity, noncoding RNA expression, and signaling pathways.
• These epigenetic changes can persist throughout life and across generations, influencing gene expression.

Conclusions:

• Developmental reprogramming of the epigenome by EDCs increases susceptibility to diseases later in life.
• Epigenomic plasticity is vulnerable to environmental disruption during development.
• Understanding these mechanisms provides insights into environmental disease etiology.