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Updated: Dec 29, 2025

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eQTLMAPT: Fast and Accurate eQTL Mediation Analysis With Efficient Permutation Testing Approaches.

Tao Wang1, Qidi Peng1, Bo Liu1

  • 1School of Computer Science and Technology, Harbin Institute of Technology, Harbin, China.

Frontiers in Genetics
|January 31, 2020
PubMed
Summary

eQTLMAPT is a new R package for analyzing gene expression regulation. It efficiently identifies mediation effects in genetic data, accelerating discovery of how genetic variations influence gene expression and disease risk.

Keywords:
cis-eQTLgene regulationmediation analysismultiple testing controlpermutation testtrans-eQTL

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Area of Science:

  • Genetics
  • Bioinformatics
  • Computational Biology

Background:

  • Expression quantitative trait locus (eQTL) analyses are crucial for understanding genetic variation's regulatory role.
  • eQTLs aid in interpreting variants identified by genome-wide association studies (GWAS).
  • Trans-eQTL effects can be mediated by local transcripts, termed mediation effects.

Purpose of the Study:

  • To develop a novel computational method for genome-wide eQTL mediation analysis.
  • To enable rapid scanning of candidate associations while controlling for multiple testing.
  • To present eQTLMAPT, an R package for efficient eQTL mediation analysis.

Main Methods:

  • Implementation of efficient permutation procedures for multiple testing correction.
  • Adaptive permutation scheme to accelerate mediation analysis by pruning the permutation process.
  • Generalized Pareto distribution (GPD) modeling of the null distribution for accurate significance estimation.

Main Results:

  • eQTLMAPT accelerates mediation analysis through an adaptive permutation scheme.
  • It accurately estimates mediation effect significance using GPD modeling.
  • The package offers flexible interfaces for combining permutation schemes and confounding adjustments.

Conclusions:

  • eQTLMAPT provides higher resolution in estimating mediation effect significance.
  • It is significantly faster (an order of magnitude) than existing methods with comparable accuracy.
  • The package facilitates comprehensive eQTL mediation analysis using genomic and transcriptomic data.