Related Experiment Video
Updated: Jul 1, 2025

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
Published on: August 15, 2019
Interactive data sharing for multiple questionnaire-based exposome-wide association studies and exposome correlations
Dillon Lloyd1, John S House1, Farida S Akhtari1
1Biostatistics and Computational Biology Branch, National Institute of Environmental Health Sciences, Durham, NC, USA.
Understanding the exposome, or all life exposures, is key to health. PEGS Explorer visualizes exposure correlations, aiding exposome-wide association studies (ExWAS) and disease research.
Area of Science:
- Environmental health
- Computational biology
- Genomics
Background:
- The exposome encompasses all individual exposures throughout life, crucial for understanding co-occurrence and health impacts.
- Exposome-wide association studies (ExWAS) are emerging to link the exposome with diseases, analogous to genome-wide association studies (GWAS).
- Limited tools and data sharing hinder comprehensive exposome research and understanding of exposure-disease relationships.
Purpose of the Study:
- To develop a web application, PEGS Explorer, for exploring correlations among diverse environmental and lifestyle exposures.
- To address the lack of accessible data and results sharing in exposome science.
- To facilitate hypothesis generation and replication of findings in other cohorts.
Main Methods:
- Developed the PEGS Explorer web application using data from the Personalized Environment and Genes Study (PEGS).
- Calculated exposure correlations rigorously, accounting for various data types.
- Integrated previously published ExWAS results and utilized globe visualizations for data exploration.
Main Results:
- PEGS Explorer allows visualization of correlations between various exposures (environmental, diet, lifestyle, etc.) associated with complex diseases.
- The application provides a centralized resource for exploring exposome data and previously published ExWAS findings.
- Facilitates contextualization, hypothesis generation, and replication of exposome-disease association studies.
Conclusions:
- PEGS Explorer enhances accessibility to exposome data and ExWAS results, addressing a critical gap in the field.
- The tool supports researchers in understanding complex exposure relationships and their impact on health.
- Future updates will ensure PEGS Explorer remains a dynamic and valuable resource for exposome science.
Related Concept Videos
Genome-wide Association Studies-GWAS
GWAS does not require the identification of the target gene involved in...
Gene-Environment Interactions
Human Genetics
The complex relationship between genetics and psychology is observable through common biological components such...
Genomics
Behavioral Genetics and Its Designs
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
Background and Environment Affect Phenotype
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...

