降低脂质降低了子瘤中的氧化应激和内皮细胞激活
Masanori Aikawa1, Seigo Sugiyama, Christopher C Hill
1Leducq Center for Cardiovascular Research, Department of Medicine, University of California, San Diego, La Jolla, Calif, USA. maikawa@rics.bwh.harvard.edu
Circulation
|September 11, 2002
概括
降低脂质可以减少氧化应激和内皮细胞激活,减少血管炎症. 这改善了内皮功能和斑块稳定性,可能降低急性冠状动脉事件.
科学领域:
- 心血管科学 心血管科学
- 分子生物学分子生物学
- 病理生理学 病理生理学
背景情况:
- 降脂疗法可以通过减少血管炎症来减轻急性冠状动脉事件.
- 氧化应激促进内皮功能障碍,其特征是增加VCAM-1和MCP-1表达和减少氧化 (NO),导致单细胞招募.
- 这项研究研究了降脂对氧化应激和内皮细胞 (EC) 功能在动脉样硬化模型中的影响.
研究的目的:
- 为了测试脂质降低降低氧化应激的假设.
- 为了确定降低脂质是否会改善与炎症细胞积累相关的EC功能.
主要方法:
- 子被食一种动脉动脉瘤诱导的动脉动脉瘤饮食,其次是降脂饮食.
- 评估了动态氧物种 (ROS) 的产生,氧化LDL (oxLDL) 的积累,VCAM-1,MCP-1和在动脉样硬化大动脉中内皮NO合成酶 (eNOS) 的表达.
- 评估了EC超结构后的脂质降低.
主要成果:
- 患有高胆固醇血症的子表现出高ROS产量,oxLDL积累和ECs中的VCAM-1过度表达.
- 降低脂质显著降低了ROS,oxLDL和炎症标志物 (VCAM-1,MCP-1).
- 内皮NO合成酶 (eNOS) 的表达增加,并且ECs在降低脂质后显示出改善的超结构.
结论:
- 降低脂质有效降低氧化应激和EC活化 in vivo.
- 这些机制可能有助于降低脂质的临床益处,包括改善内皮功能和斑块稳定.
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