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Correspondence to:
Fredrik Karpe, at the Oxford Lipid Metabolism Group, Radcliffe Infirmary, Oxford OX2 6HE, UK., fredrik.karpe{at}oxlip.ox.ac.uk (E-mail)
Remnants of triglyceride-rich lipoproteins (TRL) have been implicated in the early development of atherosclerosis. We tested this hypothesis by quantifying the plasma concentration of remnant-like particle cholesterol (RLP-C) in a cohort of healthy 50-year-old men in whom the common carotid artery intima-media thickness (CCA-IMT) was assessed by B-mode ultrasound as a surrogate marker for atherosclerosis. The subjects were given a fat-rich meal to study the generation of RLP-C during postprandial lipemia. Fasting plasma RLP-C and other major fasting plasma lipids and lipoproteins were determined twice, and the mean RLP-C concentration was strongly correlated with CCA-IMT (r = 0.32, P = 0.002). In addition, low density lipoprotein (LDL) cholesterol (r = 0.25, P = 0.01) and plasma triglycerides (r = 0.20, P = 0.05) were significantly related to CCA-IMT. Multivariate analyses showed a triglyceride-independent contribution of RLP-C to CCA-IMT. After fat intake, the median plasma RLP-C concentration was doubled after 3 h. The increase was strongly related to the postprandial generation of TRL apolipoprotein (apo)B-48, and large (Sf 60;400) TRL apoB-100. The association with CCA-IMT was somewhat stronger for the 3-h RLP-C level than for the fasting RLP-C concentration [r = 0.27, P < 0.01 (3 h) compared with r = 0.22, P < 0.05 (0 h)].
We conclude that the plasma concentration of RLP-C is related to CCA-IMT, independent of plasma triglycerides and LDL cholesterol, in a healthy middle-aged male population. Karpe, F., S. Boquist, R. Tang, G. M. Bond, U. de Faire, and A. Hamsten. Remnant lipoproteins are related to intima-media thickness of the carotid artery independently of LDL cholesterol and plasma triglycerides. J. Lipid Res. 2001. 42: 17;21.
Supplementary key words:
triglyceride-rich lipoproteins, vascular wall, alimentary lipemia, chylomicrons, very low density lipoproteins
Copyright © 2001 by Lipid Research, Inc.
Original Article
Remnant lipoproteins are related to intima-media thickness of the carotid artery independently of LDL cholesterol and plasma triglycerides
Fredrik Karpea,b,
Susanna Boquista,
Rong Tangc,
Gene M. Bondc,
Ulf de Faired, and
Anders Hamstena
a King Gustaf V Research Institute, Department of Medicine, 17176 Karolinska Institutet, Stockholm, Sweden
b Oxford Lipid Metabolism Group, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX2 6HE, UK
c Division of Ultrasound Research, Wake Forest University School of Medicine, Winston-Salem, NC
d Division of Cardiovascular Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
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