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Baseline metabolomic profiles predict cardiovascular events in patients at risk for coronary artery disease
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Baseline metabolomic profiles predict cardiovascular events in patients at risk for coronary artery disease
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Journal Article
Baseline metabolomic profiles predict cardiovascular events in patients at risk for coronary artery disease
2012
Overview
Cardiovascular risk models remain incomplete. Small-molecule metabolites may reflect underlying disease and, as such, serve as novel biomarkers of cardiovascular risk.
We studied 2,023 consecutive patients undergoing cardiac catheterization. Mass spectrometry profiling of 69 metabolites and lipid assessments were performed in fasting plasma. Principal component analysis reduced metabolites to a smaller number of uncorrelated factors. Independent relationships between factors and time-to-clinical events were assessed using Cox modeling. Clinical and metabolomic models were compared using log-likelihood and reclassification analyses.
At median follow-up of 3.1 years, there were 232 deaths and 294 death/myocardial infarction (MI) events. Five of 13 metabolite factors were independently associated with mortality: factor 1 (medium-chain acylcarnitines: hazard ratio [HR] 1.12 [95% CI, 1.04-1.21], P = .005), factor 2 (short-chain dicarboxylacylcarnitines: HR 1.17 [1.05-1.31], P = .005), factor 3 (long-chain dicarboxylacylcarnitines: HR 1.14 [1.05-1.25], P = .002); factor 6 (branched-chain amino acids: HR 0.86 [0.75-0.99], P = .03), and factor 12 (fatty acids: HR 1.19 [1.06-1.35], P = .004). Three factors independently predicted death/MI: factor 2 (HR 1.11 [1.01-1.23], P = .04), factor 3 (HR 1.13 [1.04-1.22], P = .005), and factor 12 (HR 1.18 [1.05-1.32], P = .004). For mortality, 27% of intermediate-risk patients were correctly reclassified (net reclassification improvement 8.8%, integrated discrimination index 0.017); for death/MI model, 11% were correctly reclassified (net reclassification improvement 3.9%, integrated discrimination index 0.012).
Metabolic profiles predict cardiovascular events independently of standard predictors.
Publisher
Elsevier Inc,Mosby,Elsevier Limited
Subject
/ Atherosclerosis (general aspects, experimental research)
/ Biological and medical sciences
/ Cardiac Catheterization - methods
/ Cardiac Catheterization - statistics & numerical data
/ Cardiovascular Diseases - diagnosis
/ Cardiovascular Diseases - epidemiology
/ Cardiovascular Diseases - metabolism
/ Coronary Artery Disease - diagnosis
/ Coronary Artery Disease - epidemiology
/ Coronary Artery Disease - metabolism
/ Female
/ Heart
/ Humans
/ Male
