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Updated: Feb 7, 2026
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人体血管中酸甘耐受性:证据表明酸甘生物转化受损
P R Sage1, I S de la Lande, I Stafford
1Department of Cardiology, The Queen Elizabeth Hospital, North Western Adelaide Health Service, University of Adelaide, Royal Adelaide Hospital, Adelaide, Australia.
Circulation
|January 11, 2000
概括
冠状动脉疾病患者的酸盐耐受性源于酸甘 (NTG) 生物转化受损. 虽然观察到超氧化物生成的增加,但它对减少NTG响应能力的贡献很小.
科学领域:
- 心血管药理学心血管药理学
- 酸盐生理学 酸盐生理学
- 血管生物学 血管生物学
背景情况:
- 有机酸盐用于心血管疾病,但它们的有效性随着时间的推移而减弱 (酸盐耐受性).
- 建议的酸盐耐受性机制包括从酸盐中减少氧化 (NO) 释放或通过超氧化 (O(2) ((-)) 增加NO分解.
研究的目的:
- 研究冠状动脉疾病患者中耐受酸甘油 (NTG) 的机制.
- 要区分受损的NTG生物转化和增加的O(2)(-) 生产作为耐受性的原因.
主要方法:
- 接受冠状动脉旁路手术的患者被随机分配到接受静脉内NTG或没有酸盐治疗.
- 对NTG,酸和A23187的血管反应在内部乳腺动脉和软静脉段中进行了评估.
- 测量了NTG生物转化为甘二酸盐和O(2)(-) 生成.
主要成果:
- 与对照组相比,在NTG组中,对NTG的血管反应显著减少.
- 对酸和A23187的反应没有受到影响,这表明对酸盐的特定耐受性.
- 在NTG组中发现了较低水平的1,2-甘二酸盐,这表明生物转化受损.
- 在NTG组中观察到增加的O(2)(-) 生产,但操纵O(2)(-) 水平并没有改变NTG的响应能力.
结论:
- 冠状动脉疾病中酸盐耐受性是特定于酸盐的,并且与受损的NTG生物转化有关.
- 增加的超氧化物生成在NTG耐受性中起到最小的作用,因为短期的升高不会影响NTG的响应能力.
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