Abstract:
OBJECTIVE:Recent studies have suggested that circulating malondialdehyde-modified low-density lipoprotein (MDA-LDL) is a useful marker for the identification of patients with coronary artery disease (CAD). However, the role of MDA-LDL in atherogenic mechanisms has not yet been fully determined. METHOD AND RESULTS:We investigated lipoprotein profiles measured by nuclear magnetic resonance (NMR) spectroscopy and circulating MDA-LDL levels measured by ELISA in 25 male patients with CAD and 15 age-matched male controls. We selected subjects who had a serum LDL cholesterol<160 mg/dL. The MDA-LDL levels were significantly higher in the CAD group than in the control group (P=0.01) even though there was no significant difference in the LDL cholesterol levels between the two groups. NMR analysis demonstrated that the MDA-LDL levels were positively correlated with large and intermediate very low-density lipoprotein triglyceride and LDL particle concentrations, and negatively correlated with LDL diameter and large high-density lipoprotein cholesterol. The MDA-LDL levels were negatively correlated with flow-mediated dilatation of the brachial artery. CONCLUSIONS:The high concentrations of circulating MDA-LDL derived from the atherogenic lipoprotein profiles, which induce the exaggerated production of small dense LDL. The circulating MDA-LDL may impair endothelial function and play an important role in the pathogenesis of atherosclerosis.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Miyazaki T,Shimada K,Sato O,Kotani K,Kume A,Sumiyoshi K,Sato Y,Ohmura H,Watanabe Y,Mokuno H,Daida Hdoi
10.1016/j.atherosclerosis.2004.09.013keywords:
subject
Has Abstractpub_date
2005-03-01 00:00:00pages
139-45issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(04)00502-7journal_volume
179pub_type
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