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A Meta-Analysis of Genome-Wide Association Studies of Growth Differentiation Factor-15 Concentration in Blood
Univ New South Wales, Sch Psychiat, Ctr Hlth Brain Ageing, Sydney, NSW, Australia.
Univ New South Wales, Sch Psychiat, Ctr Hlth Brain Ageing, Sydney, NSW, Australia.
Massachusetts Gen Hosp, Cardiovasc Res Ctr, Boston, MA 02114 USA;Massachusetts Gen Hosp, Dept Med, Div Cardiol, Boston, MA 02114 USA.
Univ Oxford, Wellcome Trust Ctr Human Genet, Oxford, England.
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2018 (English)In: Frontiers in Genetics, ISSN 1664-8021, E-ISSN 1664-8021, Vol. 9, article id 97Article in journal (Refereed) Published
Abstract [en]

Blood levels of growth differentiation factor-15 (GDF-15), also known as macrophage inhibitory cytokine-1 (MIC-1), have been associated with various pathological processes and diseases, including cardiovascular disease and cancer. Prior studies suggest genetic factors play a role in regulating blood MIC-1/GDF-15 concentration. In the current study, we conducted the largest genome-wide association study (GWAS) to date using a sample of similar to 5,400 community-based Caucasian participants, to determine the genetic variants associated with MIC-1/GDF-15 blood concentration. Conditional and joint (COJO), gene-based association, and gene-set enrichment analyses were also carried out to identify novel loci, genes, and pathways. Consistent with prior results, a locus on chromosome 19, which includes nine single nucleotide polymorphisms (SNPs) (top SNP, rs888663, p = 1.690 x 10(-35)), was significantly associated with blood MIC-1/GDF-15 concentration, and explained 21.47% of its variance. COJO analysis showed evidence for two independent signals within this locus. Gene-based analysis confirmed the chromosome 19 locus association and in addition, a putative locus on chromosome 1. Gene-set enrichment analyses showed that the "COPI-mediated anterograde transport" gene-set was associated with MIC-1/GDF15 blood concentration with marginal significance after FDR correction (p = 0.067). In conclusion, a locus on chromosome 19 was associated with MIC-1/GDF-15 blood concentration with genome-wide significance, with evidence for a new locus (chromosome 1). Future studies using independent cohorts are needed to confirm the observed associations especially for the chromosomes 1 locus, and to further investigate and identify the causal SNPs that contribute to MIC-1/GDF-15 levels.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2018. Vol. 9, article id 97
Keywords [en]
genome-wide association study, growth differentiation factor-15, macrophage inhibitory cytokine-1, community-based individuals, chromosome 19
National Category
Medical Genetics
Identifiers
URN: urn:nbn:se:uu:diva-354354DOI: 10.3389/fgene.2018.00097ISI: 000428198300001OAI: oai:DiVA.org:uu-354354DiVA, id: diva2:1237398
Funder
Knut and Alice Wallenberg FoundationEU, European Research CouncilSwedish Research Council, 2012-1397Swedish Research Council, 2012-1727Swedish Research Council, 2012-2215Swedish Research Council, 80576801Swedish Research Council, 70374401Swedish Foundation for Strategic Research Australian Research Council, DP0774213Australian Research Council, DP0773584Australian Research Council, LP0669645Available from: 2018-08-08 Created: 2018-08-08 Last updated: 2018-08-08Bibliographically approved

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