Relationship Between Biomarkers of Oxidized Low-Density Lipoprotein, Statin Therapy, Quantitative Coronary Angiography, and Atheroma Volume: Observations From the REVERSAL (Reversal of Atherosclerosis with Aggressive Lipid Lowering) Study

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• 作者：Seung Hyuk Choi ; Andrew Chae ; Elizabeth Miller ; Michael Messig ; Fady Ntanios ; Anthony N. DeMaria ; Steven E. Nissen ; Joseph L. Witztum ; Sotirios Tsimikas
• 关键词：lipoproteins ; oxidation ; atherosclerosis ; lipoprotein (a) ; oxidized phospholipids
• 刊名：Journal of the American College of Cardiology
• 出版年：2008
• 出版时间：1 July 2008
• 年：2008
• 卷：52
• 期：1
• 页码：24-32
• 全文大小：744 K

文摘

Objectives

This study was designed to test the hypothesis that circulating biomarkers of oxidized low-density lipoprotein (OxLDL) are affected by statin therapy and predict changes in atheroma volume.

Background

Oxidative stress is thought to play an important role in atherogenesis but the relationship between OxLDL, statin therapy, and atheroma volume in humans is not known.

Methods

In a subgroup of 214 patients from the REVERSAL (Reversal of Atherosclerosis with Aggressive Lipid Lowering) trial, oxidized phospholipids (OxPL) and malondialdehyde (MDA) epitopes per apolipoprotein B-100 (apoB), immunoglobin (Ig) G and IgM apoB immune complexes, and OxLDL autoantibodies were measured at baseline and after 18 months of treatment with atorvastatin or pravastatin. Relationships between changes of OxLDL biomarkers and quantitative coronary angiography (QCA), total atheroma volume, and percentage atheroma volume were analyzed.

Results

There were no differences in QCA parameters or atheroma volume in the 2 groups at baseline. Compared with baseline values, OxPL/apoB and MDA/apoB, and lipoprotein (a) levels increased 21 % to 48 % (p < 0.001 for all) in response to atorvastatin and 17 % to 39 % (p < 0.001 for all) in response to pravastatin. In contrast, IgG apoB immune complexes, IgM apoB immune complexes, and IgM OxLDL autoantibodies were significantly reduced by both atorvastatin and pravastatin (p value range 0.003 to <0.001). There were no significant differences between the atorvastatin and pravastatin groups. In the entire cohort, there were no correlations between changes in any OxLDL biomarkers and changes in QCA parameters or atheroma volume.

Conclusions

Statin therapy results in significant increases in OxPL/apoB, MDA/apoB, and lipoprotein (a) levels and decreases in apoB immune complexes and OxLDL autoantibodies. However, these measures did not correlate with changes in QCA parameters or atheroma volume.