通过增加高密度脂蛋白在与孤立的低高密度脂蛋白的人群中恢复内皮功能
Radjesh J Bisoendial1, G Kees Hovingh, Johannes H M Levels
1Department of Vascular Medicine, Academic Medical Center, Meibergdreef 9, 1105 AZ Amsterdam, Netherlands.
Circulation
|May 29, 2003
概括
由于ATP结合盒 (ABCA) - 1突变导致家族性低脂蛋白血症导致低HDL,导致内皮功能障碍. 输注阿波利波蛋白AI/酸丁胆 (apoA-I/PC) 的磁盘迅速恢复了血管功能,突出显示了HDL.
科学领域:
- 心血管生物学 心血管生物学
- 脂质代谢 脂质代谢是什么
- 血管生理学 血管生理学
背景情况:
- 家庭性低脂蛋白血症 (低HDL) 是由ATP结合盒 (ABCA) -1基因中的功能丧失突变引起的.
- 这为研究孤立的低高密度脂蛋白 (HDL) 胆固醇提供了一个模型.
研究的目的:
- 评估孤立的低HDL对内皮功能的影响.
- 评估HDL急性增加对血管的影响.
主要方法:
- 在9名ABCA1异构体和9名对照体中,使用静脉封闭囊法测量了血管功能.
- 评估了对血管扩张剂 (血清素) 和氧化合成酶抑制 (L-NMMA) 的前臂血流反应.
- 在静脉注射阿波利波蛋白A-I/氨酸胆 (apoA-I/PC) 盘后,对反应进行了重新评估.
主要成果:
- 与对照人群相比,ABCA1异构体的HDL水平显著降低,前臂血流对血和L-NMMA的反应变得.
- 输注apoA-I/PC盘在ABCA1异构细胞中使HDL水平正常化.
- 输液后,对血清素和L-NMMA的血管运动反应在ABCA1异构体中完全恢复.
结论:
- 在ABCA1异构体中隔离的低HDL与内皮功能障碍和受损的氧化生物活性有关.
- 单次输注的apoA-I/PC迅速和完全恢复了内皮功能.
- 高脂对动脉壁产生直接的有益影响,超出其在逆胆固醇运输中的作用.
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