基础医学与临床 ›› 2011, Vol. 31 ›› Issue (9): 1055-1056.

• 研究短文 • 上一篇    下一篇

高血压大鼠主动脉平滑肌BK通道的表达改变

韩莲花1,杨向军1,蒋文平2,林佳1,郑冬冬1   

  1. 1. 苏州大学附属第一医院
    2.
  • 收稿日期:2010-09-13 修回日期:2010-11-18 出版日期:2011-09-05 发布日期:2011-09-05
  • 通讯作者: 韩莲花 E-mail:shuibing120@163.com

Expression changes of large conductance Ca2+-activated K+ channel on rats aortas during hypertension

  • Received:2010-09-13 Revised:2010-11-18 Online:2011-09-05 Published:2011-09-05

摘要: 目的 研究在自发性高血压大鼠(Spontaneous hypertensive rats,SHR)和正常对照组大鼠(wistar-kyoto,WKY)主动脉平滑肌上大电导钙激活钾通道(BK)的功能改变及其机制。方法 用实时定量PCR反应和免疫印迹对SHR和WKY大鼠的主动脉组织的BK通道组成亚基α和β1表达量的检测。结果 SHR大鼠α和β1亚基的mRNA的表达量明显高于WKY大鼠(n=6,p<0.05),SHR大鼠的α亚基的蛋白表达量与WKY没有显著性差异(n=6,p>0.05),β1亚基的蛋白表达量SHR大鼠却明显高于WKY大鼠(n=6,p<0.05)。结论 SHR大鼠BK通道在mRNA水平和蛋白水平的表达都比WKY增强,可能是在高血压状况下机体负反馈抑制血管张力的一种调节机制。

关键词: 高血压 , 主动脉平滑肌 , 大电导钙激活钾通道 , α亚基 , β1亚基

Abstract: Objective to study the expression changes and mechanism of large conductance Ca2+-activated K+ channel on aortas between SHR and WKY. Methods the expression of BKα subunit andβ1 subunit on aortas between SHR and WKY by means of real-time quantitative PCR and western blotting.Results In mRNA study,expression ofαandβ1 subunit are higher in SHR than WKY(n=6,p<0.05).In protein expression,αsubunit has no significant difference between SHR and WKY(n=6,p>0.05),butβ1subunit in SHR is more than WKY, and there was significant difference(n=6,p<0.05).Conclusions the expression of BKα subunit andβ1 subunit mRNA and protein in SHR are higher than that in WKY which may be a Negative feedback mechanism to Vascular tone during hypertension.

Key words: hypertension, aortas smooth muscle, large conductance Ca2+-activated K+ channel, α subunit, β1 subunit

中图分类号: