慢性贫血与全身内皮功能障碍有关
Ramesh Chennupati1, Isabella Solga1, Patricia Wischmann1
1Division of Cardiology, Pulmonology and Vascular Medicine, Medical Faculty, Heinrich-Heine University, Düsseldorf, Germany.
Frontiers in cardiovascular medicine
|May 26, 2023
概括
由于氧化应激增加,慢性贫血会导致内皮功能障碍. 补充N-乙囊 (NAC) 或抑制髓氧化酶 (MPO) 可以扭转这种功能障碍.
科学领域:
- 心血管生物学 心血管生物学
- 血液学 血液学 血液学
- 血管医学 血管医学
背景情况:
- 贫血与心脏病的不良结果有关.
- 内皮功能障碍 (ED),是氧化 (NO) 中介放松的减少,在慢性贫血 (CA) 中了解得很少.
- 这项研究调查了CA是否会通过增加氧化应激引起ED.
研究的目的:
- 为了确定慢性贫血 (CA) 是否与内皮功能障碍 (ED) 有关.
- 研究氧化应激和炎症在CA引起的ED中的作用.
- 探索在CA中对ED的潜在治疗干预措施.
主要方法:
- 慢性贫血 (CA) 诱导在小鼠通过血液抽取.
- 流媒扩张 (FMD) 和大动脉环测试评估了血管功能.
- 分析了炎症标志物,氧化应激标志物 (MPO,4-HNE) 和NO合成酶表达.
- 干预措施包括阿尔金酶抑制,N-乙囊 (NAC) 补充和MPO抑制.
主要成果:
- 贫血持续时间与口病减少和大动脉环中NO依赖放松减少相关.
- 来自贫血患者的红细胞损害了血管放松.
- 在大动脉内皮中,CA增加了血VCAM-1,ICAM-1,iNOS表达和MPO/4-HNE.
- 在贫血小鼠中,NAC或MPO抑制改善了血管放松.
结论:
- 慢性贫血导致通过炎症,iNOS活性和ROS产生渐进的内皮功能障碍.
- 像NAC和MPO抑制剂这样的ROS清理剂显示出治疗贫血相关ED的潜力.
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