Journal Article

Susceptibility to coronary artery disease and diabetes is encoded by distinct, tightly linked SNPs in the ANRIL locus on chromosome 9p

Helen M. Broadbent, John F. Peden, Stefan Lorkowski, Anuj Goel, Halit Ongen, Fiona Green, Robert Clarke, Rory Collins, Maria Grazia Franzosi, Gianni Tognoni, Udo Seedorf, Stephan Rust, Per Eriksson, Anders Hamsten, Martin Farrall and Hugh Watkins

in Human Molecular Genetics

Volume 17, issue 6, pages 806-814
Published in print March 2008 | ISSN: 0964-6906
Published online November 2007 | e-ISSN: 1460-2083 | DOI: http://dx.doi.org/10.1093/hmg/ddm352
Susceptibility to coronary artery disease and diabetes is encoded by distinct, tightly linked SNPs in the ANRIL locus on chromosome 9p

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Genome-wide association studies have identified a region on chromosome 9p that is associated with coronary artery disease (CAD). The region is also associated with type 2 diabetes (T2D), a risk factor for CAD, although different SNPs were reported to be associated to each disease in separate studies. We have undertaken a case–control study in 4251 CAD cases and 4443 controls in four European populations using previously reported (‘literature’) and tagging SNPs. We replicated the literature SNPs (P = 8×10−13; OR = 1.29; 95% CI: 1.20–1.38) and showed that the strong consistent association detected by these SNPs is a consequence of a ‘yin-yang’ haplotype pattern spanning 53 kb. There was no evidence of additional CAD susceptibility alleles over the major risk haplotype. CAD patients without myocardial infarction (MI) showed a trend towards stronger association than MI patients. The CAD susceptibility conferred by this locus did not differ by sex, age, smoking, obesity, hypertension or diabetes. A simultaneous test of CAD and diabetes susceptibility with CAD and T2D-associated SNPs indicated that these associations were independent of each other. Moreover, this region was not associated with differences in plasma levels of low-density lipoprotein cholesterol, high-density lipoprotein cholesterol, fibrinogen, albumin, uric acid, bilirubin or homocysteine, although the CAD-high-risk allele was paradoxically associated with lower triglyceride levels. A large antisense non-coding RNA gene (ANRIL) collocates with the high-risk haplotype, is expressed in tissues and cell types that are affected by atherosclerosis and is a prime candidate gene for the chromosome 9p CAD locus.

Journal Article.  5923 words.  Illustrated.

Subjects: Genetics and Genomics

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