Assessment of research models for testing gene-environment interactions

Area of Science:

• Pharmacogenomics
• Genetics
• Toxicology

Background:

• Historically, toxicant, nutrient, and drug effects were studied in populations, limiting analysis of individual response variations.
• Genetic and lifestyle factors influencing individual responses were previously difficult to analyze due to limited data and tools.
• Large-scale genomics projects (e.g., Human Genome Project) are now cataloging human genetic variation.

Purpose of the Study:

• To discuss the challenges and opportunities in designing research studies that account for individual genetic variation.
• To explore the use of in vivo and in vitro model systems for studying genotype-phenotype relationships before human trials.

Main Methods:

• Review of current and developing in vivo and in vitro model test systems.
• Analysis of model systems' advantages and disadvantages concerning individual genetic makeup and xenobiotic responses.

Main Results:

• Genomic projects provide unprecedented data on human genetic variation.
• Advances in DNA sequencing enable individual genome characterization for genotype-response association studies.
• Model systems are crucial for pre-clinical research on individual responses to xenobiotics.

Conclusions:

• Understanding individual genetic variation is key to advancing personalized medicine.
• Developing robust research methodologies and model systems is essential for future pharmacogenomic studies.
• Model systems offer a platform to investigate genotype-specific responses to environmental exposures.