Cholesterol Acyltransferase Gene Mutations Have Accelerated Atherogenesis as Assessed by Carotid 3.0-T Magnetic Resonance Imaging: Carriers of Lecithin

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• 作者：Raphaë ; l  ; Duivenvoorden MD^?/sup> ; Adriaan G.  ; Holleboom MD^?/sup> ; Bas  ; van den Bogaard MD^?/sup> ; Aart J.  ; Nederveen PhD^&dagger ; ; Eric  ; de Groot MD ; PhD^?/sup> ; Barbara A.  ; Hutten PhD^&Dagger ; ; Alinda W.  ; Schimmel BSc^?/sup> ; G. Kees  ; Hovingh MD ; PhD^?/sup> ; John J.P.  ; Kastelein MD ; PhD^?/sup> ; Jan Albert  ; Kuivenhoven PhD^?/sup> ; Erik S.G.  ; Stroes MD ; PhD^?/sup> ;   ; ^{e.s.stroes@amc.uva.nl}
• 关键词：atherosclerosis ; genetics ; high-density lipoprotein ; lecithin ; cholesterol acyltransferase ; magnetic resonance imaging
• 刊名：Journal of the American College of Cardiology
• 出版年：2011
• 出版时间：6 December 2011
• 年：2011
• 卷：58
• 期：24
• 页码：2481-2487
• 全文大小：306 K

文摘

Objectives

The aim of this study was to investigate the role of reduced lecithin: cholesterol acyltransferase (LCAT) function on atherogenesis using 3.0-T carotid magnetic resonance imaging (MRI) and B-mode ultrasound.

Background

The role of low high-density lipoprotein cholesterol as a causal factor in atherogenesis has recently been questioned. LCAT plays a key role in high-density lipoprotein cholesterol metabolism.

Methods

Carotid 3.0-T MRI and B-mode ultrasound measurements were performed in 40 carriers of LCAT gene mutations and 40 controls, matched for age. Patients with cardiovascular disease were excluded.

Results

Carriers had 31 % lower LCAT activity levels and 38 % decreased high-density lipoprotein cholesterol levels (both p < 0.001 vs. controls). Carriers presented with a 10 % higher normalized wall index (0.34 ¡À 0.07 vs. 0.31 ¡À 0.04, p = 0.002), a 22 % higher mean wall area (17.3 ¡À 8.5 mm² vs. 14.2 ¡À 4.1 mm², p = 0.01), and a 22 % higher total wall volume (1,039 ¡À 508 mm³ vs. 851 ¡À 247 mm³, p = 0.01 vs. controls) as measured by MRI. The prevalence (20 vs. 5, p = 0.002) and the total volume (102 mm³ vs. 3 mm³) of atherosclerotic plaque components on MRI relating to lipid-rich tissue or calcification were also higher in carriers than in controls. All differences retained significance after adjustment for age, sex, blood pressure, low-density lipoprotein cholesterol, body mass index, smoking, and family history of cardiovascular disease. Common carotid intima-media thickness measured with ultrasound was increased in carriers by 12.5 % (0.72 ¡À 0.33 mm vs. 0.64 ¡À 0.15 mm, p = 0.14).

Conclusions

Carriers of LCAT gene mutations exhibit increased carotid atherosclerosis, indicating an increased risk of cardiovascular disease. The present findings imply that increasing LCAT activity may be an attractive target in cardiovascular prevention strategies.