Gene-environment interactions in human health.

Area of Science:

• Genetics and Public Health
• Biostatistics
• Environmental Health

Background:

• Gene-environment interactions (G×E) significantly influence complex human traits and diseases.
• Assessing G×E involves analyzing deviations from predictive models based on genetic or environmental factors alone.
• Current heterogeneity in G×E analytical frameworks limits their public health utility.

Purpose of the Study:

• To review study design considerations for G×E research.
• To discuss analytical frameworks for assessing environment-dependent polygenic liability and identifying specific G×E variants.
• To provide recommendations for improving G×E study conceptualization, methodology, and reporting.

Main Methods:

• Review of existing G×E study designs and analytical frameworks.
• Discussion of methods to assess polygenic liability influenced by environmental factors.
• Exploration of techniques for identifying genetic variants with G×E and characterizing environmental contexts.

Main Results:

• Identified heterogeneity in G×E study applications and reporting as a key challenge.
• Outlined approaches to assess environment-dependent genetic liability and specific G×E.
• Highlighted the need for standardized reporting and methodology in G×E research.

Conclusions:

• Standardized approaches to G×E study design, analysis, and reporting are essential for public health.
• Addressing methodological and reporting pitfalls will enhance the reliability and applicability of G×E findings.
• Future research should focus on robust G×E characterization to better understand complex diseases.