The ACCORD trial tested whether 1) intensive glucose ontrol reduces cardiovascular disease (CVD) events more than standard glucose control, 2) intensive blood pressure control reduces CVD events more than standard blood pressure control, 3) treatment of dyslipidemia with simvastatin plus fenofibrate reduce CVD events more than treatment with simvastatin alone in people with type 2 diabetes mellitus (ACCORD Lipid). In ACCORD Lipid, although simvastatin plus fenofibrate did not significantly reduce CVD events compared to simvastatin alone, pre- specified analyses demonstrated heterogeneity in response to fenofibrate by gender, race, and baseline lipid values with men, whites, and those with significant dyslipidemia appearing to have fewer CVD events. To better understand this heterogeneity, we propose to identify non-lipid biomarkers predictive of fenofibrate response. These include apoB, apoCIII, apoAI, apoAII, lipoprotein size and particle number, VLDL composition, including lipidomic profiling of VLDL TG fatty acids, fibrinogen, CRP, and homocysteine. Specifically we will 1) determine the ability of these biomarkers to predict the occurrence of CVD in a sub-cohort of ACCORD Lipid participants 2) assess the ability of fenofibrate to favorably modify these biomarkers and 3) determine the ability of these biomarkers to predict favorable responses to fenofibrate in the subgroups that demonstrated heterogeneity. We will focus our study on a case-cohort of 1800 individuals from the entire study cohort. However, as noted, we will also conduct analyses on three subgroups in which there appeared to be heterogeneity regarding the effects of fenofibrate treatment on CVD: men vs. women, Whites vs non-whites, and dyslipidemics vs non-dyslipidemics.

Public Health Relevance

This goal of the proposed study is to identify plasma biomarkers hat will be useful in predicting which patients will respond beneficially to the combination of a statin (such as simvastatin used in this study) and a fibrate (such as fenofibrate used in this study). This is particularly important because in ACCORD Lipid, although the overall effect of adding fenofibrate to simvastatin was a modest and non-significant reduction in cardiovascular events, a subgroup of subjects with the highest triglyceride and lowest HDL cholesterol levels may have benefited. On the other hand, women and non-whites did not appear to do as well as men and whites. Our results should help us understand these different results.

Agency
National Institute of Health (NIH)
Institute
National Heart, Lung, and Blood Institute (NHLBI)
Type
Research Project (R01)
Project #
5R01HL110418-02
Application #
8451278
Study Section
Special Emphasis Panel (ZRG1-CVRS-C (50))
Program Officer
Kirby, Ruth
Project Start
2012-04-01
Project End
2015-03-31
Budget Start
2013-04-01
Budget End
2014-03-31
Support Year
2
Fiscal Year
2013
Total Cost
$741,083
Indirect Cost
$277,906
Name
Columbia University (N.Y.)
Department
Internal Medicine/Medicine
Type
Schools of Medicine
DUNS #
621889815
City
New York
State
NY
Country
United States
Zip Code
10032
Ginsberg, Henry N; Reyes-Soffer, Gissette (2013) Niacin: a long history, but a questionable future. Curr Opin Lipidol 24:475-9