Early nutrition and epigenetic programming: chasing shadows.

Area of Science:

• Epigenetics and developmental biology
• Environmental influences on health

Background:

• Epigenetic modifications are crucial for sustained responses to transient environmental stimuli.
• These modifications can alter gene expression patterns and phenotypes later in life.

Purpose of the Study:

• To review recently discovered mechanisms of epigenetic modifications.
• To re-evaluate prevailing views on the dynamics, positions, and functions of epigenetic marks.

Main Methods:

• Review of recent studies on epigenetic mechanisms.
• Analysis of animal models (mice, rats, sheep, pigs, rabbits) and human studies.
• Incorporation of high-throughput technologies.

Main Results:

• Animal models demonstrate the influence of early nutrition on adult health and disease.
• Studies reveal a self-propagating epigenetic cycle and crosstalk between epigenetic marks.
• Recent research links early nutrition, epigenetic processes, and long-term illness.

Conclusions:

• Significant progress has been made, but understanding the precise mechanisms and timing of environmental stressor impacts on epigenetics is incomplete.
• Identifying key epigenetic marks and their alterations across development, lifespan, and generations remains a challenge.