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Kinetic and Related Determinants of Plasma Triglyceride Concentration in Abdominal Obesity Multicenter Tracer Kinetic Study

Journal article
Authors Jan Borén
G. F. Watts
Martin Adiels
S. Soderlund
D. C. Chan
A. Hakkarainen
N. Lundbom
N. Matikainen
J. Kahri
B. Verges
P. H. R. Barrett
M. R. Taskinen
Published in Arteriosclerosis Thrombosis and Vascular Biology
Volume 35
Issue 10
Pages 2218-2224
ISSN 1079-5642
Publication year 2015
Published at Institute of Medicine, Department of Molecular and Clinical Medicine
Pages 2218-2224
Language en
Keywords apolipoproteins B, cardiovascular disease, kinetics, multicompartmental modeling, obesity, apolipoprotein-c-iii, low-density-lipoprotein, very-low-density, of-function mutations, rich lipoproteins, cardiovascular-disease, lipase, activity, hepatic lipase, fat-content, metabolism, Hematology, Cardiovascular System & Cardiology
Subject categories Cardiac and Cardiovascular Systems, Cardiovascular medicine


Objectives Patients with obesity and diabetes mellitus have increased risk of cardiovascular disease. A major cause is an atherogenic dyslipidemia related primarily to elevated plasma concentrations of triglyceride-rich lipoproteins. The aim of this study was to clarify determinants of plasma triglyceride concentration. We focused on factors that predict the kinetics of very-low density lipoprotein 1 (VLDL1) triglycerides. Approach and Results A multicenter study using dual stable isotopes (deuterated leucine and glycerol) and multicompartmental modeling was performed to elucidate the kinetics of triglycerides and apoB in VLDL1 in 46 subjects with abdominal obesity and additional cardiometabolic risk factors. Results showed that plasma triglyceride concentrations were dependent on both the secretion rate (r=0.44, P<0.01; r=0.45, P<0.01) and fractional catabolism (r=0.49, P<0.001; r=0.55, P<0.001) of VLDL1-triglycerides and VLDL1-apoB. Liver fat mass was independently and directly associated with secretion rates of VLDL1-triglycerides (r=0.56, P<0.001) and VLDL1-apoB (r=0.53, P<0.001). Plasma apoC-III concentration was independently and inversely associated with the fractional catabolisms of VLDL1-triglycerides (r=0.48, P<0.001) and VLDL1-apoB (r=0.51, P<0.001). Conclusions Plasma triglyceride concentrations in abdominal obesity are determined by the kinetics of VLDL1 subspecies, catabolism being mainly dependent on apoC-III concentration and secretion on liver fat content. Reduction in liver fat and targeting apoC-III may be an effective approach for correcting triglyceride metabolism atherogenic dyslipidemia in obesity.

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