Strategy for investigating interactions between measured genes and measured environments

Area of Science:

• Psychiatric Genetics
• Environmental Health
• Neuroscience

Background:

• Gene-environment interaction (GxE) describes how environmental exposures affect health based on an individual's genotype.
• Historically, GxE was considered rare in psychiatry, but emerging empirical evidence now supports its significance.
• Despite growing interest, GxE research faces challenges regarding feasibility and methodology.

Purpose of the Study:

• To promote hypothesis-driven research investigating measured gene-environment interactions (GxE).
• To summarize current evidence of GxE in psychiatric disorders.
• To outline strategic steps for conducting effective GxE studies and highlight their benefits for neuroscience and gene discovery.

Main Methods:

• Review of emerging evidence on GxE in psychiatric disorders.
• Description of a 7-step strategic framework for organizing future GxE research.
• Explanation of the advantages of measured GxE approaches for basic science.

Main Results:

• Empirical findings of measured GxEs are increasingly reported in psychiatric research.
• A strategic framework is proposed to guide future hypothesis-driven GxE studies.
• The measured GxE approach offers significant benefits for advancing basic neuroscience and gene hunting.

Conclusions:

• Integrating environmental factors (nurture) with genetic research is essential for advancing psychiatric genetics.
• Effective GxE research can enhance our understanding of the biological underpinnings of psychiatric disorders.
• Future research should focus on hypothesis-driven GxE studies to unlock new discoveries.