DOI: 10.1101/495226Dec 13, 2018Paper

Multi-tissue analysis reveals short tandem repeats as ubiquitous regulators of gene expression and complex traits

BioRxiv : the Preprint Server for Biology
Stephanie Feupe FotsingMelissa Gymrek

Abstract

Short tandem repeats (STRs) have been implicated in a variety of complex traits in humans. However, genome-wide studies of the effects of STRs on gene expression thus far have had limited power to detect associations and provide insights into putative mechanisms. Here, we leverage whole genome sequencing and expression data for 17 tissues from the Genotype-Tissue Expression Project (GTEx) to identify STRs for which repeat number is associated with expression of nearby genes (eSTRs). Our analysis reveals more than 28,000 eSTRs. We employ fine-mapping to quantify the probability that each eSTR is causal and characterize a group of the top 1,400 fine-mapped eSTRs. We identify hundreds of eSTRs linked with published GWAS signals and implicate specific eSTRs in complex traits including height and schizophrenia, inflammatory bowel disease, and intelligence. Overall, our results support the hypothesis that eSTRs contribute to a range of human phenotypes and will serve as a valuable resource for future studies of complex traits.

Related Concepts

Projections and Predictions
Gene Expression
Genes
Inflammatory Bowel Diseases
Intelligence
Schizophrenia
Tandem Repeat Sequences
Estring
Analysis
Protein Expression

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