Journal
ATHEROSCLEROSIS
Volume 263, Issue -, Pages 301-308Publisher
ELSEVIER IRELAND LTD
DOI: 10.1016/j.atherosclerosis.2017.06.925
Keywords
Myocardial infarction; Plasmalogen; Biomarker; Peripheral artery disease
Funding
- Queensland Government
- James Cook University
- National Health and Medical Research Council (NHMRC) [1020955, 1022752, 1000967, 1029754]
- Victorian State Government Operational Infrastructure support scheme
- NHMRC Australia [1117061]
- NHMRC [1042095, 1059454]
- National Health and Medical Research Council of Australia [1059454, 1117061] Funding Source: NHMRC
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Background and aims: Despite current best care, patients with peripheral artery disease (PAD) remain at high risk of myocardial infarction, and biomarkers to more accurately assess cardiovascular risk are needed. This study assessed the relationship between the serum lipidome and incident myocardial infarction in a cohort of PAD patients. Methods: 265 PAD patients were followed up for a median of 23 months, during which 18 people suffered a myocardial infarction. Fasting serum concentrations of 332 lipid species were measured via mass spectrometry and their association with incident myocardial infarction was assessed via Cox regression. Secondary analyses investigated prognostic potential of specific lipid species. Results: Total serum concentrations of alkyl-phosphatidylcholine and alkenylphospatidylcholine (plasmalogen) lipids were inversely associated with incident myocardial infarction after adjusting for multiple testing (hazards ratio (95% confidence intervals): 0.43 (0.24-0.74); p = 0.032; and 0.28 (0.14-0.56), p = 0.010, respectively). Specifically, 10 alkenylphosphatidylcholine species and 6 alkyl-phosphatidylcholine species were negatively associated with incident myocardial infarction after adjusting for traditional risk factors and correcting for multiple testing (hazards ratios ranging from 0.07 to 0.51, p < 0.05). Incorporation of serum phosphatidylcholine plasmalogen species PC(P-40: 6) concentration within analyses designed to determine subsequent myocardial infarction incidence led to an improvement in predictive accuracy compared to traditional risk factors alone. Conclusions: Serum concentrations of phosphatidylcholine plasmalogens and alkyl-phosphatidylcholines were negatively associated with incident myocardial infarction and have potential to act as novel prognostic markers in at-risk populations. (C) 2017 Elsevier B.V. All rights reserved.
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