通过NKCC1/TRPV4/NCX轴,Cl诱导依赖内皮的中肠动脉血管松
Cheng Lu1, Luyun Zhang2, Xiongying Chen2
1Department of Pharmacology, School of Pharmacy, Qingdao University Medical College, #1 Ningde Road, Qingdao 266073, China; Department of Gastroenterology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China.
Life sciences
|July 14, 2023
概括
离子 (Cl-) 通过激活内皮依赖高极化 (EDH) 来诱导介质动脉中的血管松. 这一过程涉及到Na+-K+-2Cl-共载体1 (NKCC1),TRPV4和Na+-Ca2+交换器 (NCX).
科学领域:
- 身体生理学 身体生理学
- 血管生物学 血管生物学
- 交通运输 交通运输 交通运输
背景情况:
- 吸收的化 (NaCl) 会增加肠道的血液流动.
- 离子 (Cl-) 在调解中枢动脉放松中的直接作用尚不清楚.
- 内皮依赖高极化 (EDH) 是调节血管度的关键机制.
研究的目的:
- 调查Cl-是否直接诱导介质动脉中的血管松.
- 测试Cl-通过EDH调解血管松的假设.
- 为了阐明参与Cl诱导的血管松的特定分子途径.
主要方法:
- 电线肌图被用来评估NaCl诱导的小鼠中腔动脉中的血管松.
- 在人类血管内皮细胞中进行了 (Cl-), (Ca2+) 和 (K+) 的成像.
- 使用药物剂和淘汰赛小鼠 (TRPV4 KO) 来剖析信号通路.
主要成果:
- 诱导的度依赖性血管松,主要通过EDH.
- 这种血管松在TRPV4淘汰赛小鼠中被减弱,并被NKCC1,TRPV4,SKCa/IKCa通道和肌内皮间隙结的阻断剂抑制.
- Cl-改变了细胞内离子度,减少了K+和增加了内皮细胞中的Cl-,并通过TRPV4和NCX诱导了Ca2+信号传递.
结论:
- 通过纯粹的EDH机制,Cl-直接诱导介质动脉中的血管松.
- 内皮NKCC1/TRPV4/NCX轴对于Cl-诱导的血管松至关重要.
- 这项研究为通过EDH调节血管度的Cl-的作用提供了新的见解.
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