Loci affecting gamma-glutamyl transferase in adults and adolescents show age × SNP interaction and cardiometabolic disease associations

  • Rita P. Middelberg
  • , Beben Benyamin
  • , Marleen H.M. de Moor
  • , Nicole M. Warrington
  • , Scott Gordon
  • , Anjali K. Henders
  • , Sarah E. Medland
  • , Dale R. Nyholt
  • , Eco J.C. de Geus
  • , Jouke J. Hottenga
  • , Gonneke Willemsen
  • , Lawrence J. Beilin
  • , Trevor A. Mori
  • , Margaret J. Wright
  • , Andrew C. Heath
  • , Pamela A.F. Madden
  • , Dorret I. Boomsma
  • , Craig E. Pennell
  • , Grant W. Montgomery
  • , Nicholas G. Martin
  • John B. Whitfield*
*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Serum gamma-glutamyl transferase (GGT) activity is a marker of liver disease which is also prospectively associated with the risk of all-cause mortality, cardiovascular disease, type 2 diabetes and cancers. We have discovered novel loci affecting GGT in a genome-wide association study (rs1497406 in an intergenic region of chromosome 1, P = 3.9 × 10 -8; rs944002 in C14orf73 on chromosome 14, P = 4.7 × 10 -13; rs340005 in RORA on chromosome 15, P = 2.4 × 10 -8), and a highly significant heterogeneity between adult and adolescent results at the GGT1 locus on chromosome 22 (maximum P HET = 5.6 × 10 -12 at rs6519520). Pathway analysis of significant and suggestive single-nucleotide polymorphism associations showed significant overlap between genes affecting GGT and those affecting common metabolic and inflammatory diseases, and identified the hepatic nuclear factor (HNF) family as controllers of a network of genes affecting GGT. Our results reinforce the disease associations of GGT and demonstrate that control by the GGT1 locus varies with age.

Original languageEnglish
Article numberddr478
Pages (from-to)446-455
Number of pages10
JournalHuman Molecular Genetics
Volume21
Issue number2
DOIs
Publication statusPublished - Jan 2012
Externally publishedYes

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