减少了静止血液的流动,并抑制了人体前臂的诱导的血管扩张
Matthew Dawes1, Christine Sieniawska, Trevor Delves
1Department of Clinical Pharmacology and Centre for Cardiovascular Biology and Medicine, King's College, London, UK.
Circulation
|March 20, 2002
概括
内部调整通道 (KIR) 和Na+/K+ ATPase在调节血管度和人类前臂血管中诱导的血管扩张方面发挥着关键作用.
科学领域:
- 身体生理学 身体生理学
- 心血管研究研究心血管研究
- 离子通道功能的功能
背景情况:
- 细胞外 (K+) 在体外超极化并放松血管光滑肌肉.
- 内部调整通道 (KIR) 和Na+/K+ ATPase调解这些K+诱导的血管效应.
- 基尔在人类前臂阻力血管中的作用仍然未被描述.
研究的目的:
- 研究KIR和Na+/K+ ATPase在控制人类前臂血管度中的作用.
- 确定这些通道是否参与K+诱导的血管扩张.
主要方法:
- 在健康的男性受试者身上,前臂血液流量通过囊造影进行测量.
- 药物和电解质,包括化 (BaCl2),瓦和化 (KCl),被输入静脉内.
- 评估了KIR和Na+/K+ ATPase抑制剂的使用和不使用.
主要成果:
- BaCl2输液增加了前臂血管阻力,并抑制了K+诱导的血管扩张.
- 奥阿巴因还降低了血液流动,并增强了BaCl2对K+诱导的血管扩张的抑制作用.
- 由K+诱导的血管扩张被BaCl2显著减弱,并且几乎被BaCl2加ouabain消除.
结论:
- KIR和Na+/K+ ATPase与维持人类前臂阻力血管的基础血管度有关.
- 这些离子运输机制对于K+诱导的血管扩张在这种血管床中至关重要.
- 准KIR和Na+/K+ ATPase可能为心血管疾病提供治疗潜力.
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