High-Density Lipoprotein Mediated Cellular Cholesterol Efflux in Acute Coronary Syndromes

被引:52
|
作者
Hafiane, Anouar [1 ]
Jabor, Bashar [1 ]
Ruel, Isabelle [1 ]
Ling, Jennifer [1 ]
Genest, Jacques [1 ]
机构
[1] McGill Univ, Royal Victoria Hosp, Fac Med, Cardiovasc Res Labs,Div Cardiol, Montreal, PQ H3A 1A1, Canada
来源
AMERICAN JOURNAL OF CARDIOLOGY | 2014年 / 113卷 / 02期
基金
加拿大健康研究院;
关键词
SERUM AMYLOID-A; CARDIOVASCULAR-DISEASE; ARTERY-DISEASE; HDL; APOLIPOPROTEIN; INFLAMMATION; MECHANISMS; MYELOPEROXIDASE; CHLORINATION; MACROPHAGES;
D O I
10.1016/j.amjcard.2013.09.006
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Systemic inflammation at the development of an acute coronary syndrome (ACS) might alter the high-density lipoprotein (IBM) components and function. One of the major functions of HDL particles is their ability to remove cellular cholesterol from macrophages. The aim of the present study was to characterize the HDL efflux capacity in patients with ACS. We analyzed the cholesterol efflux in those ACS (within 72 hours of symptoms [ACS1]) and, again, 3 months later (ACS2). As controls, we used normal subjects without coronary artery disease (CAD) and patients with chronic, stable CAD. The 4 groups were matched for age and HDL cholesterol levels. We used a cell-based efflux system in (3)[H]-cholesterol-labeled J774 macrophages to measure cholesterol efflux from apolipoprotein B-depleted plasma. The present study included 20 patients with ACS. Their mean age was 58 +/- 9 years, and the mean HDL cholesterol level was 1.06 +/- 0.22 mmol/L (41 +/- 9 mg/di). The ACS1 group showed a marked increase in high-sensitivity C-reactive protein and serum amyloid A, reflecting systemic inflammation. The HDL cholesterol efflux capacity was reduced in ACS1 subjects and remained reduced 12 weeks later and in those with stable CAD. These results suggest that the acute presence of serum amyloid A does not account for the impairment of HDL-mediated cholesterol efflux capacity in the ACS1 group. Little correlation was found between HDL cholesterol and HDL efflux capacity (r = 0.233; p = 0.049), suggesting that HDL cholesterol is a poor marker of HDL function in inflammatory states and CAD. In conclusion, our data support the concept that atherogenic HDL dysfunction and impaired efflux occur in ACS, independent of changes in plasma HDL cholesterol and apolipoprotein A-I levels. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码:249 / 255
页数:7
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