LDexpress: an online tool for integrating population-specific linkage disequilibrium patterns with tissue-specific...

Area of Science:

• Genetics
• Genomics
• Bioinformatics

Background:

• Genome-wide association studies (GWAS) identify numerous genetic loci linked to cancer and other diseases.
• Connecting germline variations within these loci to gene expression changes is crucial for nominating candidate genes for disease risk.
• Functional investigation of these candidate genes is essential for understanding disease etiology.

Purpose of the Study:

• To develop LDexpress, an accessible online resource for studying regional germline variation and its impact on gene expression.
• To integrate population-specific linkage disequilibrium data with tissue-specific expression data for comprehensive analysis.
• To provide a flexible and efficient tool for investigating genetic variants and their potential role in disease risk.

Main Methods:

• Developed LDexpress, a publicly available web tool.
• Integrated linkage disequilibrium data from the 1000 Genomes (1000G) project.
• Incorporated tissue-specific expression data from the Genotype-Tissue Expression (GTEx) project.
• Designed for ease of use, flexibility in variant queries, and efficient analysis across multiple tissues.

Main Results:

• LDexpress successfully integrates diverse genetic and expression datasets.
• The tool allows for efficient querying of dozens of variants across multiple tissue types.
• Demonstrated the utility of LDexpress through example genomic queries.
• The resource facilitates the study of regional germline variation impacting gene expression.

Conclusions:

• LDexpress accelerates the understanding of disease etiology by linking germline variation to gene expression.
• The tool aids in nominating candidate genes for disease risk assessment.
• Anticipated to be a valuable resource for genetic and genomic research in disease susceptibility.