Novel Loci, Including Those Related to Crohn Disease, Psoriasis, and Inflammation, Identified in a Genome-Wide Association Study of Fibrinogen in 17 686 Women
Open Access
- 1 April 2009
- journal article
- research article
- Published by Ovid Technologies (Wolters Kluwer Health) in Circulation: Cardiovascular Genetics
- Vol. 2 (2), 134-141
- https://doi.org/10.1161/CIRCGENETICS.108.825273
Abstract
Background— Fibrinogen is a multifunctional circulating glycoprotein involved in wound healing, thrombosis, platelet aggregation, and inflammation, and elevated levels predict vascular disease. Despite evidence of crucial biological function and moderate heritability, comprehensive analysis of the influence of genetic variation on fibrinogen is not available. Methods and Results— To address this issue, we undertook a genome-wide association study evaluating the potential relationships between 337 343 single-nucleotide polymorphisms (SNPs) and plasma fibrinogen levels among 17 686 apparently healthy women participating in the Women’s Genome Health Study. As C-reactive protein is also an inflammatory marker known to predict cardiovascular diseases, we compared the determinants of fibrinogen levels with those of C-reactive protein. Four novel loci were identified, in addition to the fibrinogen gene cluster, which were associated with fibrinogen levels at genome-wide levels of significance (range of probability values from 8.82�10 −09 to 8.04�10 −39 ). Two of the loci are related to common chronic inflammatory diseases: the first, at locus 5q31.1 ( SLC22A5 , SLC22A4 , IRF1 ), lies immediately adjacent to a locus linked to Crohn disease ( P value for lead SNP, 1.24�10 −12 ) and the second, at locus 17q25.1 ( CD300LF , SLC9A3R1 , NAT9 ), has been associated with psoriasis ( P value for lead SNP, 7.72�10 −11 ). A third locus at 1q21.3 ( IL6R ) lies within the interleukin 6 receptor gene, a critical component of the inflammatory cascade ( P value for lead SNP, 1.80�10 −11 ). A novel locus at 2q34 ( CPSI ) participates in the urea cycle ( P =8.82�10 −09 ). The majority of implicated SNPs showed little evidence of dual association with C-reactive protein levels. Conclusions— A genome-wide survey of the human genome identifies novel loci related to common chronic inflammatory diseases as genetic determinants of fibrinogen levels, in addition to loci that relate to the inflammatory cascade, the urea cycle, and the fibrinogen gene cluster.Keywords
This publication has 35 references indexed in Scilit:
- Association of Novel Genetic Loci With Circulating Fibrinogen LevelsCirculation: Cardiovascular Genetics, 2009
- Loci Related to Metabolic-Syndrome Pathways Including LEPR,HNF1A, IL6R, and GCKR Associate with Plasma C-Reactive Protein: The Women's Genome Health StudyAmerican Journal of Human Genetics, 2008
- PLINK: A Tool Set for Whole-Genome Association and Population-Based Linkage AnalysesAmerican Journal of Human Genetics, 2007
- Genome-wide association study of 14,000 cases of seven common diseases and 3,000 shared controlsNature, 2007
- Admixture Mapping of an Allele Affecting Interleukin 6 Soluble Receptor and Interleukin 6 LevelsAmerican Journal of Human Genetics, 2007
- Principal components analysis corrects for stratification in genome-wide association studiesNature Genetics, 2006
- Haploview: analysis and visualization of LD and haplotype mapsBioinformatics, 2004
- Relationship Between Carbamoyl-Phosphate Synthetase Genotype and Systemic Vascular FunctionHypertension, 2004
- Novel immunoglobulin superfamily gene cluster, mapping to a region of human chromosome 17q25, linked to psoriasis susceptibilityHuman Genetics, 2003
- Acute-Phase Proteins and Other Systemic Responses to InflammationThe New England Journal of Medicine, 1999