相关实验视频
内皮功能障碍与人类高正常范围内的胆固醇水平有关
H O Steinberg1, B Bayazeed, G Hook
1Indiana University Medical Center and the Richard L. Roudebush Veterans Affairs Medical Center, Indianapolis 46202-5111, USA.
Circulation
|December 13, 1997
概括
高的正常胆固醇水平会损害血管功能,即使在正常范围内. 这种内皮功能障碍可能会增加心血管疾病的风险.
科学领域:
- 心血管生理学心血管生理学
- 内皮细胞功能 内皮细胞功能
- 脂质代谢 脂质代谢是什么
背景情况:
- 胆固醇在心血管健康中的作用已得到充分证实,但其在正常范围内对血管功能的影响不太清楚.
- 内皮功能障碍是动脉样硬化和大血管疾病的早期标志物.
研究的目的:
- 调查正常范围内的胆固醇水平与内皮依赖血管扩张之间的关联.
- 测试高正常胆固醇与血管功能受损相关的假设.
主要方法:
- 评估腿部血流 (LBF) 对内皮依赖 (甲醇化物) 和内皮独立 (酸) 血管扩张剂的反应.
- 招募了健康的志愿者,他们的总胆固醇水平在正常范围内.
- 在低正常和高正常胆固醇水平的受试者之间比较LBF反应.
主要成果:
- 腿部血流 (LBF) 随着两种血管扩展剂的剂量而增加.
- 在高正常胆固醇患者中,与低正常胆固醇患者相比,内皮依赖的血管扩张显著减弱.
- 在高正常胆固醇组中,最大的内皮依赖血管扩张减少了近50%.
- 在总胆固醇和LDL胆固醇水平与最大内皮依赖血管扩张之间观察到显著的负相关性.
- 两组之间没有发现对内皮独立血管扩展剂的反应有显著差异.
结论:
- 胆固醇水平和内皮依赖血管扩张之间存在反向关系.
- 在正常范围内的胆固醇水平可能与内皮功能障碍有关.
- 这种亚临床内皮功能障碍可能导致与胆固醇升高相关的宏血管疾病风险增加.
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