Genetic Drivers of Epigenetic and Transcriptional Variation in Human Immune Cells

Cell. 2016 Nov 17;167(5):1398-1414.e24. doi: 10.1016/j.cell.2016.10.026.

Abstract

Characterizing the multifaceted contribution of genetic and epigenetic factors to disease phenotypes is a major challenge in human genetics and medicine. We carried out high-resolution genetic, epigenetic, and transcriptomic profiling in three major human immune cell types (CD14+ monocytes, CD16+ neutrophils, and naive CD4+ T cells) from up to 197 individuals. We assess, quantitatively, the relative contribution of cis-genetic and epigenetic factors to transcription and evaluate their impact as potential sources of confounding in epigenome-wide association studies. Further, we characterize highly coordinated genetic effects on gene expression, methylation, and histone variation through quantitative trait locus (QTL) mapping and allele-specific (AS) analyses. Finally, we demonstrate colocalization of molecular trait QTLs at 345 unique immune disease loci. This expansive, high-resolution atlas of multi-omics changes yields insights into cell-type-specific correlation between diverse genomic inputs, more generalizable correlations between these inputs, and defines molecular events that may underpin complex disease risk.

Keywords: DNA methylation; EWAS; QTL; allele specific; histone modification; immune; monocyte; neutrophil; t-cell; transription.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Alternative Splicing
  • Epigenomics*
  • Female
  • Genetic Predisposition to Disease
  • Hematopoietic Stem Cells / metabolism
  • Histone Code
  • Humans
  • Immune System Diseases / genetics*
  • Male
  • Middle Aged
  • Monocytes / metabolism*
  • Neutrophils / metabolism*
  • Quantitative Trait Loci
  • T-Lymphocytes / metabolism*
  • Transcription, Genetic*
  • Young Adult