Absolute Quantification of Plasma Apolipoproteins for Cardiovascular Disease Risk Prediction
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Apolipoproteins have important structural and functional roles in several lipoprotein particles. Apolipoproteins regulate lipid metabolism, adipose tissue, and energy production and serve major regulatory roles in both pre- and pro-atherosclerotic mechanisms. They are also involved in protective mechanisms against atherosclerotic plaques. Therefore, accurate quantification of apolipoproteins may serve as a crucial biomarker for cardiovascular diseases. However, most apolipoproteins cannot be detected using standard clinical immunoassays, and multiplexing is not available for some species of apolipoproteins. Herein, we describe a highly robust and quantitative method using liquid chromatography coupled to tandem mass spectrometry to quantify apolipoproteins in plasma. This methodology may add clinical value for profiling cardiovascular risk in vulnerable individuals and enable monitoring of apolipoprotein levels in plasma following intervention strategies.
Key wordsApolipoproteins Cardiovascular disease Metabolism Inflammation Oxidative stress Aging
N.B. is the recipient of the Australian Research Council Discovery Early Career Research Award at the University of New South Wales, Sydney, Australia.
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