Fetal alcohol spectrum disorders: the epigenetic perspective

Area of Science:

• Developmental Biology
• Toxicology
• Epigenetics

Background:

• Ethanol is a known teratogen causing diverse developmental abnormalities.
• Variability in teratogenic effects is linked to timing and dosage during development.
• Key developmental periods include preconception, preimplantation, and gastrulation.

Purpose of the Study:

• To explore the role of epigenetic mechanisms in fetal alcohol spectrum disorders (FASDs).
• To investigate how ethanol interferes with epigenetic processes.
• To propose an expanded model of FASDs including preconceptional effects.

Main Methods:

• Review of animal model studies on ethanol teratogenesis.
• Analysis of ethanol's impact on one-carbon metabolism, DNA methylation, histone modifications, and noncoding RNA.
• Correlation of teratogenesis periods with epigenetic reprogramming peaks.

Main Results:

• Ethanol interferes with critical epigenetic mechanisms like DNA methylation and histone modifications.
• Periods of peak epigenetic reprogramming coincide with sensitive developmental stages for teratogenesis.
• Evidence suggests ethanol's effects extend to the preconception period.

Conclusions:

• Epigenetic mechanisms are crucial in the etiology of FASDs.
• The "fetal alcohol spectrum" should encompass preconceptional effects.
• Further research into the epigenetic basis of FASDs is urgently needed for public health.