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J Am Coll Cardiol. 2011 Dec 13;58(25):2675-82. doi: 10.1016/j.jacc.2011.08.054.

Genetic susceptibility to coronary heart disease in type 2 diabetes: 3 independent studies.

Author information

  • 1Department of Nutrition, Harvard School of Public Health, Boston, Massachusetts, USA. nhlqi@channing.harvard.edu

Abstract

OBJECTIVES:

The aim of this study was to evaluate whether coronary heart disease (CHD)-susceptibility loci identified by genome-wide association studies of the general population also contribute to CHD in type 2 diabetes.

BACKGROUND:

No study has examined the effects of these genetic variants on CHD in diabetic patients.

METHODS:

We genotyped 15 genetic markers of 12 loci in 3 studies of diabetic patients: the prospective Nurses' Health Study (309 CHD cases, and 544 control subjects) and Health Professional Follow-up Study (345 CHD cases, and 451 control subjects) and the cross-sectional Joslin Heart Study (422 CHD cases, and 435 control subjects).

RESULTS:

Five single-nucleotide polymorphisms, rs4977574 (CDKN2A/2B), rs12526453 (PHACTR1), rs646776 (CELSR2-PSRC1-SORT1), rs2259816 (HNF1A), and rs11206510 (PCSK9) showed directionally consistent associations with CHD in the 3 studies, with combined odds ratios (ORs) ranging from 1.17 to 1.25 (p = 0.03 to 0.0002). None of the other single-nucleotide polymorphisms reached significance in individual or combined analyses. A genetic risk score (GRS) was created by combining the risk alleles of the 5 significantly associated loci. The OR of CHD/GRS unit was 1.19 (95% confidence interval: 1.13 to 1.26; p < 0.0001). Individuals with GRS ≥8 (19% of diabetic subjects) had almost a 2-fold increase in CHD risk (OR: 1.94, 95% confidence interval: 1.60 to 2.35) as compared with individuals with GRS ≤5 (30% of diabetic subjects). Prediction of CHD was significantly improved (p < 0.001) when the GRS was added to a model including clinical predictors in the combined samples.

CONCLUSIONS:

Our results illustrate the consistency and differences in the determinants of genetic susceptibility to CHD in diabetic patients and the general populations.

Copyright © 2011 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.

PMID:
22152955
[PubMed - indexed for MEDLINE]
PMCID:
PMC3240896
Free PMC Article

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