Challenges in nutrition-related DNA methylation studies

Area of Science:

• Nutritional Epigenetics
• Molecular Biology
• Genetics

Background:

• Nutritional epigenetics explores gene-nutrient interactions and transgenerational epigenetic inheritance.
• Dietary components can induce epimutations, altering gene expression.
• Advancements in genome-wide DNA methylation detection offer insights into nutritional impacts on epigenetics.

Purpose of the Study:

• To review and discuss the practical and theoretical challenges in nutritional epigenetics, focusing on DNA methylation.
• To highlight issues in study design, sample quality, detection methods, data processing, and analysis.
• To address complexities in interpreting epigenetic changes and assigning functional significance.

Main Methods:

• Systematic review of challenges in nutritional epigenetics research.
• Discussion of bias generators in study design and execution.
• Analysis of data processing, statistical, and bioinformatic considerations for DNA methylation studies.

Main Results:

• Identified challenges across all stages of nutritional epigenetics research, from design to interpretation.
• Highlighted issues such as epigenetic heterogeneity, genomic variability, and measurement bias.
• Emphasized the need to revisit epigenetic paradigms due to study complexities.

Conclusions:

• Resolving challenges in nutritional epigenetics is crucial for advancing the field.
• Addressing methodological and interpretational issues will enhance understanding of gene-nutrient interactions.
• It is anticipated that these challenges will be largely overcome in the coming decade.