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缺血性预约会降低后缺血性心肌瘤坏死因子-α的产生. 预先条件化的潜在最终效应机制
D R Meldrum1, C A Dinarello, B D Shames
1Department of Surgery, University of Colorado Health Sciences Center, Denver 80262, USA.
Circulation
|December 16, 1998
概括
缺血性预约和腺降低心肌瘤瘤坏死因子-α (TNF-α) 的产生,改善缺血性再输血损伤后的心脏功能. 这表明降低TNF-alpha是预条件保护作用的关键机制.
科学领域:
- 心血管研究研究心血管研究
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
背景情况:
- 瘤缩因子-α (TNF-α) 在各种心脏疾病中促进心肌功能障碍和细胞死亡.
- 心脏细胞和透的白细胞产生TNF-α.
- 氨酸减少TNF-alpha的产生,并保护心脏,但其在预条件诱导的TNF-alpha减少中的作用尚不清楚.
研究的目的:
- 调查缺血预调是否会降低缺血后心肌TNF-alpha的产生.
- 为了确定降低TNF-alpha是否是预调的心脏保护作用的机制.
主要方法:
- 孤立的老鼠心经历了全球性缺血-再输血 (I/R),有或没有缺血预调或腺预处理.
- 用ELISA测量心脏TNF-α水平.
- 用兰根多夫方法评估心肌功能.
- 在一些实验中,使用TNF结合蛋白来隔离TNF-alpha.
主要成果:
- 缺血 - 重灌 (I / R) 增加心脏TNF-alpha和心脏功能受损.
- 缺血预调和腺素显著降低了心肌TNF-alpha水平.
- 前置条件和腺都改善了血后的功能恢复.
- 用一种结合蛋白阻断TNF-alpha也可以增强功能恢复.
结论:
- 缺血预调可以减少心肌缺血后的TNF-alpha产生.
- 降低的TNF-alpha是调解心肌功能障碍前置条件的保护作用的关键机制.
- 这项研究提供了第一个证据,证明预条件对心脏病后心脏病的TNF-alpha的影响.
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