Skeletal muscle enhancer interactions identify genes controlling whole-body metabolism

Nat Commun. 2020 Jun 1;11(1):2695. doi: 10.1038/s41467-020-16537-6.

Abstract

Obesity and type 2 diabetes (T2D) are metabolic disorders influenced by lifestyle and genetic factors that are characterized by insulin resistance in skeletal muscle, a prominent site of glucose disposal. Numerous genetic variants have been associated with obesity and T2D, of which the majority are located in non-coding DNA regions. This suggests that most variants mediate their effect by altering the activity of gene-regulatory elements, including enhancers. Here, we map skeletal muscle genomic enhancer elements that are dynamically regulated after exposure to the free fatty acid palmitate or the inflammatory cytokine TNFα. By overlapping enhancer positions with the location of disease-associated genetic variants, and resolving long-range chromatin interactions between enhancers and gene promoters, we identify target genes involved in metabolic dysfunction in skeletal muscle. The majority of these genes also associate with altered whole-body metabolic phenotypes in the murine BXD genetic reference population. Thus, our combined genomic investigations identified genes that are involved in skeletal muscle metabolism.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Cell Line
  • Chromatin / genetics
  • Chromatin / metabolism
  • Diabetes Mellitus, Type 2 / genetics*
  • Diabetes Mellitus, Type 2 / metabolism*
  • Diabetes Mellitus, Type 2 / pathology
  • Enhancer Elements, Genetic*
  • Female
  • Gene Expression Profiling
  • Genome-Wide Association Study
  • Humans
  • Insulin Resistance / genetics*
  • Male
  • Mice
  • Muscle Fibers, Skeletal / drug effects
  • Muscle Fibers, Skeletal / metabolism
  • Muscle, Skeletal / metabolism*
  • Obesity / genetics*
  • Obesity / metabolism*
  • Obesity / pathology
  • Palmitic Acid / pharmacology
  • Peptide Initiation Factors / genetics
  • Polymorphism, Single Nucleotide
  • Promoter Regions, Genetic
  • Tumor Necrosis Factor-alpha / pharmacology

Substances

  • Chromatin
  • Itgb4bp protein, mouse
  • Peptide Initiation Factors
  • Tumor Necrosis Factor-alpha
  • Palmitic Acid