Bivariate genome-wide association study identifies novel pleiotropic loci for lipids and inflammation
File(s)art%3A10.1186%2Fs12864-016-2712-4.pdf (695.95 KB)
Published version
Author(s)
Type
Journal Article
Abstract
Background: Genome-wide association studies (GWAS) have identified multiple genetic loci for C-reactive protein (CRP) and lipids, of which some overlap. We aimed to identify genetic pleiotropy among CRP and lipids in order to better understand the shared biology of chronic inflammation and lipid metabolism. Results: In a bivariate GWAS, we combined summary statistics of published GWAS on CRP (n = 66,185) and lipids, including LDL-cholesterol, HDL-cholesterol, triglycerides, and total cholesterol (n = 100,184), using an empirical weighted linear-combined test statistic. We sought replication for novel CRP associations in an independent sample of 17,743 genotyped individuals, and performed in silico replication of novel lipid variants in 93,982 individuals. Fifty potentially pleiotropic SNPs were identified among CRP and lipids: 21 for LDL-cholesterol and CRP, 20 for HDL-cholesterol and CRP, 21 for triglycerides, and CRP and 20 for total cholesterol and CRP. We identified and significantly replicated three novel S NPs for CRP in or near CTSB/FDFT1 (rs10435719, P replication : 2.6 × 10 -5 ), STAG1/PCCB (rs7621025, P replication : 1.4 × 10 -3 ) and FTO (rs1558902, P replication : 2.7 × 10 -5 ). Seven pleiotropic lipid loci were replicated in the independent set of MetaboChip samples of the Global Lipids Genetics Consortium. Annotating the effect of replicated CRP SNPs to the expression of nearby genes, we observed an effect of rs10435719 on gene expression of FDFT1, and an effect of rs7621025 on PCCB. Conclusions: Our large scale combined GWAS analysis identified numerous pleiotropic loci for CRP and lipids providing further insight in the genetic interrelation between lipids and inflammation. In addition, we provide evidence for FDFT1, PCCB and FTO to be associated with CRP levels.
Date Issued
2016-06-10
Date Acceptance
2016-05-06
Citation
BMC Medical Genomics, 2016, 17 (1)
ISSN
1755-8794
Publisher
BioMed Central
Journal / Book Title
BMC Medical Genomics
Volume
17
Issue
1
Copyright Statement
© 2016 Ligthart et al. This article is distributed under the terms of the Creative Commons Attribution 4.0
International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and
reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to
the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver
(http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and
reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to
the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver
(http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Subjects
Science & Technology
Life Sciences & Biomedicine
Biotechnology & Applied Microbiology
Genetics & Heredity
C-reactive protein
Inflammation
Lipids
Genome-wide association study
Genetic pleiotropy
BODY-MASS INDEX
REACTIVE PROTEIN-LEVELS
SQUALENE SYNTHASE
RELEVANCE
STATINS
DISEASE
Biomarkers
C-Reactive Protein
Cholesterol, HDL
DNA Replication
Gene Expression
Genetic Association Studies
Genome-Wide Association Study
Lipid Metabolism
Multifactorial Inheritance
Polymorphism, Single Nucleotide
Quantitative Trait Loci
Triglycerides
Inflammation Working Group of the CHARGE Consortium
PMI-WG-XCP
LifeLines Cohort Study
06 Biological Sciences
11 Medical And Health Sciences
08 Information And Computing Sciences
Bioinformatics
Publication Status
Published
Article Number
443