...
首页> 外文期刊>Journal of vascular research >Different effect of Rho kinase inhibition on calcium signaling in rat isolated large and small arteries
【24h】

Different effect of Rho kinase inhibition on calcium signaling in rat isolated large and small arteries

机译:Rho激酶抑制对大鼠分离的大动脉和小动脉钙信号传导的不同影响

获取原文
获取原文并翻译 | 示例
           

摘要

In addition to its role in the regulation of artery contraction, Rho kinase (ROCK) was reported to be involved in the cytosolic calcium response to vasoconstrictor agonists in rat aorta and superior mesenteric artery (SMA). However, it remains to be determined whether ROCK also contributes to calcium signaling in resistance arteries, which play a major role in blood pressure regulation. The investigation of the effect of ROCK inhibition on the calcium and contractile responses of rat resistance mesenteric artery (RMA), in comparison with aorta and SMA, indicated that the calcium response to noradrenaline was inhibited by the ROCK inhibitor Y-27632 in aorta and SMA but not in RMA. The effect of Y-27632 on the calcium signal was unaffected by cytochalasin-D. ROCK activation in noradrenaline-stimulated arteries was confirmed by the inhibition of myosin light chain phosphorylation by Y-27632. Moreover, noradrenaline-induced calcium signaling was similarly inhibited by nimodipine in aorta, SMA and RMA, but nimodipine sensitivity of the contraction increased from the aorta to the RMA, suggesting that the contraction was controlled by different sources of calcium. In pressurized RMA, Y-27632 and H-1152 depressed pressure-induced calcium responses and abolished myogenic contraction. These results stress the important differences in calcium signaling between conductance and resistance arteries.
机译:据报道,除了其在调节动脉收缩中的作用外,Rho激酶(ROCK)还参与了对大鼠主动脉和肠系膜上动脉(SMA)的血管收缩激动剂的胞质钙反应。但是,ROCK是否也有助于抵抗动脉中的钙信号传递尚有待确定,而抵抗动脉在血压调节中起着重要作用。与主动脉和SMA相比,ROCK抑制作用对大鼠抵抗性肠系膜动脉(RMA)的钙和收缩反应的影响研究表明,ROCK抑制剂Y-27632在主动脉和SMA中抑制了去甲肾上腺素的钙反应但在RMA中则没有。 Y-27632对钙信号的影响不受细胞松弛素D的影响。 Y-27632抑制肌球蛋白轻链磷酸化证实了去甲肾上腺素刺激的动脉中的ROCK活化。此外,去甲肾上腺素诱导的钙信号同样受到尼莫地平在主动脉,SMA和RMA中的抑制,但尼莫地平对收缩的敏感性从主动脉到RMA增加,表明该收缩受不同钙源控制。在加压RMA中,Y-27632和H-1152抑制了压力诱导的钙反应并消除了肌源性收缩。这些结果强调了电导和阻力动脉之间钙信号传导的重要差异。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号