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氨酸通过释放血管固定的髓氧化酶来增加内皮氧化的生物可用性
Stephan Baldus1, Volker Rudolph, Mika Roiss
1Department of Cardiology, University Hospital Hamburg-Eppendorf, Hamburg, Germany. baldus@uke.uni-hamburg.de
Circulation
|April 12, 2006
概括
氨酸的使用可从血管中调动骨髓氧化酶 (MPO),改善冠状动脉疾病 (CAD) 患者的血管功能和氧化 (NO) 生物可用性. 这表明MPO在血管炎症中的作用.
科学领域:
- 心血管医学 心血管医学
- 炎症生物学 炎症生物学
- 药理学 药理学是指药理学的学科.
背景情况:
- 中性粒细胞和单细胞是血管炎症疾病的关键参与者.
- 白细胞衍生的髓氧化酶 (MPO) 通过氧化氧化物 (NO) 来损害血管运动功能.
- 对血管壁的MPO结合对于内皮功能障碍至关重要.
研究的目的:
- 为了研究氨酸是否能从人类血管区调动MPO.
- 为了确定肝素是否会增加血管NO的生物可用性和功能.
- 通过MPO调动来探索肝素的抗炎作用.
主要方法:
- 在109名患者的血MPO水平评估使用ELISA在肝素给药前后.
- 通过流媒体扩张和乙胆诱导的前臂血流来测量内皮NO的生物可用性.
- 分析了氨酸对血管组织中MPO负担的ex vivo影响.
主要成果:
- 患有冠状动脉疾病 (CAD) 的患者在肝素注射后血MPO的增加更高.
- 氨酸治疗显著改善了内皮NO生物可用性和功能.
- 氨酸诱导的MPO释放与改善的内皮功能相关 (r=0.69,P<0.01).
- 活体肝素治疗减少了对血管部件的MPO负担.
结论:
- 通过肝素调动与血管相关的MPO可能会产生抗炎作用.
- 氨酸增强了血管NO的生物可用性,可能通过MPO释放.
- 这些发现支持MPO在人类血管NO信号损害中的因果作用.
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