Abstract
Aims/hypothesis: Both obesity and genetics contribute to cardiovascular disease (CVD). We examined whether a genetic risk score (GRS) prospectively predicted cardiovascular morbidity and mortality among overweight/obese individuals with type 2 diabetes and whether behavioural weight loss could diminish this association. Methods: Look AHEAD (Action for Health in Diabetes) is a randomised controlled trial to determine the effects of intensive lifestyle intervention (ILI), including weight loss and physical activity, relative to diabetes support and education, on cardiovascular outcomes among overweight/obese individuals with type 2 diabetes. Of the participants, 4,016 provided consent for genetic analyses and had DNA samples passing quality control procedures. These secondary data analyses focused on whether a GRS derived from 153 single nucleotide polymorphisms (SNPs) associated with coronary artery disease in the most recent genome-wide association study predicted cardiovascular morbidity and mortality over a median of 9.6 years of follow-up, and whether ILI would diminish this association. Results: The GRS significantly predicted the primary composite endpoint of death from cardiovascular causes, nonfatal myocardial infarction, nonfatal stroke, or hospitalisation for angina in the full sample (HR, 95% CI per 1 SD increase in GRS: 1.19 [1.10, 1.28]) and among individuals with no known history of CVD at baseline (HR 1.18 [95% CI 1.07, 1.30]). In no case did ILI significantly alter this association. Conclusions/interpretation: A GRS comprised of SNPs significantly predicts cardiovascular morbidity and mortality over 9.6 years of follow-up in Look AHEAD. Lifestyle intervention did not alter the genetic association. Clinical Trial Registration: NCT00017953; NCT01270763.
Original language | English (US) |
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Pages (from-to) | 1803-1813 |
Number of pages | 11 |
Journal | Diabetologia |
Volume | 58 |
Issue number | 8 |
DOIs | |
State | Published - Aug 23 2015 |
Bibliographical note
Publisher Copyright:© 2015, Springer-Verlag Berlin Heidelberg.
Keywords
- Cardiovascular disease
- Genetics
- Lifestyle intervention
- Myocardial infarction
- Obesity
- Stroke
- Type 2 diabetes
- Weight loss