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L-Carnitine Supplementation Increases Trimethylamine-N-Oxide but not Markers of Atherosclerosis in Healthy Aged Women
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L-Carnitine Supplementation Increases Trimethylamine-N-Oxide but not Markers of Atherosclerosis in Healthy Aged Women
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Journal Article
L-Carnitine Supplementation Increases Trimethylamine-N-Oxide but not Markers of Atherosclerosis in Healthy Aged Women
2019
Overview
Background: L-carnitine can be metabolized to trimethylamine N-oxide (TMAO), a molecule that promotes atherogenesis through its interaction with macrophages and lipid metabolism. Objective: The aim of the present study was to assess whether L-carnitine supplementation may promote changes in selected serum biomarkers of atherosclerosis. Methods: Before the start, in the mid-point and after completing the 24-weeks supplementation protocol, fasting blood samples were taken from the antecubital vein. Plasma free L-carnitine and TMAO were determined by the UPLC/MS/MS method. Serum proteins were determined by the enzyme immunoassay method using commercially available kits. Total cholesterol, high-density lipoprotein-cholesterol, low-density lipoprotein-cholesterol, and triglycerides have been determined using standard automatic analyzer. Results: L-carnitine supplementation elevated fasting plasma carnitine in the mid-point of our study and it remained increased until the end of supplementation period. Moreover, it induced tenfold increase in plasma TMAO concentration but did not affect serum C-reactive protein, interleukin-6, tumour necrosis factor-α, L-selectin, P-selectin, vascular cell adhesion molecule-1, intercellular adhesion molecule-1 or lipid profile markers. Conclusion: We demonstrated that although oral L-carnitine supplementation significantly increased plasma TMAO concentration, no lipid profile changes or other markers of adverse cardiovascular events were detected in healthy aged women over the period of 24 weeks.
Publisher
S. Karger AG
Subject
