Genome Wide Meta-analysis Highlights the Role of Genetic Variation in RARRES2 in the Regulation of Circulating Serum Chemerin.

Research output: Contribution to journalArticle

Abstract

Chemerin is an adipokine proposed to link obesity and chronic inflammation of adipose tissue. Genetic factors determining chemerin release from adipose tissue are yet unknown. We conducted a meta-analysis of genome-wide association studies (GWAS) for serum chemerin in three independent cohorts from Europe: Sorbs and KORA from Germany and PPP-Botnia from Finland (total N = 2,791). In addition, we measured mRNA expression of genes within the associated loci in peripheral mononuclear cells by micro-arrays, and within adipose tissue by quantitative RT-PCR and performed mRNA expression quantitative trait and expression-chemerin association studies to functionally substantiate our loci. Heritability estimate of circulating chemerin levels was 16.2% in the Sorbs cohort. Thirty single nucleotide polymorphisms (SNPs) at chromosome 7 within the retinoic acid receptor responder 2 (RARRES2)/Leucine Rich Repeat Containing (LRRC61) locus reached genome-wide significance (p<5.0×10-8) in the meta-analysis (the strongest evidence for association at rs7806429 with p = 7.8×10-14, beta = -0.067, explained variance 2.0%). All other SNPs within the cluster were in linkage disequilibrium with rs7806429 (minimum r2 = 0.43 in the Sorbs cohort). The results of the subgroup analyses of males and females were consistent with the results found in the total cohort. No significant SNP-sex interaction was observed. rs7806429 was associated with mRNA expression of RARRES2 in visceral adipose tissue in women (p<0.05 after adjusting for age and body mass index). In conclusion, the present meta-GWAS combined with mRNA expression studies highlights the role of genetic variation in the RARRES2 locus in the regulation of circulating chemerin concentrations.

Details

Authors
  • Anke Tönjes
  • Markus Scholz
  • Jana Breitfeld
  • Carola Marzi
  • Harald Grallert
  • Arnd Gross
  • Claes Ladenvall
  • Dorit Schleinitz
  • Kerstin Krause
  • Holger Kirsten
  • Jennifer Kriebel
  • Barbara Thorand
  • Wolfgang Rathmann
  • Inga Prokopenko
  • Bo Isomaa
  • Frank Beutner
  • Jürgen Kratzsch
  • Joachim Thiery
  • Mathias Fasshauer
  • Nora Klöting
  • Christian Gieger
  • Matthias Blüher
  • Michael Stumvoll
  • Peter Kovacs
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Endocrinology and Diabetes
Original languageEnglish
Article numbere1004854
JournalPLoS Genetics
Volume10
Issue number12
Publication statusPublished - 2014
Publication categoryResearch
Peer-reviewedYes

Total downloads

No data available