川芎嗪对大鼠心肌细胞膜钙通道的影响及其作用机制  被引量:8

The Effect and Mechanism of Ligustrazine on Calcium Channels in Cell Membrane of Rat Cardiac Muscles

在线阅读下载全文

作  者:田振军[1] 李红艳[1] 张志琪[1] 马新庭[1] 郭进[1] 

机构地区:[1]陕西师范大学,陕西西安710062

出  处:《体育科学》2006年第11期80-83,共4页China Sport Science

基  金:国家自然科学基金资助项目(20175012;20575039);教育部博士学科点基金(20050718011);陕西省自然科学基金项目(2004C232)

摘  要:目的:观察川芎嗪(L ig)对心肌细胞膜钙通道及胞内游离C a2+浓度([C a2+]i的影响,并探讨其作用机制。方法:急性分离大鼠心肌细胞,用特异性C a2+荧光探针F luo-3/AM负载细胞,激光共聚焦显微镜(LSCM)检测L ig作用后心肌细胞内[C a2+]i的变化。结果:L ig(30μm o l/L)可降低细胞内[C a2+]i;L-型钙通道阻断剂V erapam il(40μm o l/L)、1β受体特异阻断剂A teno lo l(900μm o l/L)和1α受体特异阻断剂Phen to lam ine(1×1-0 5m o l/L)预处理,均可不同程度地阻断L ig(30μm o l/L)对心肌细胞钙的作用;L ig(30μm o l/L)对1α受体特异激动剂Pheny lephrine(1×1-0 4m o l/L)、钙通道激动剂A 23187(900μm o l/L)和1β受体特异激动剂D obu tam ine(1×10-5m o l/L)引起的细胞内钙升高有抑制作用。不与血管紧张素Ⅱ的Ⅰ型受体(AT1R)阻断剂V a lsartan位点作用。结论:L ig对心肌细胞内[C a2+]i的降低作用,是由细胞膜上的L-型钙离子通道、1α受体和1β受体介导的。The purpose of this study was to observe the effect of Ligustrazine (Lig) on the intracellular free Ca^2+ concentration ([Ca^2+]i) of cardiac muscle and calcium channels of cell membrane, and investigate its mechanism. The acute-separated ventricular cells of rat with Fluo-3/AM and use laser confocal microscope (LSCM) measure the change of Intracellular free Ca^2+ concentration [Ca^2+ ]i. The result showed that Lig (30 μmol& #t 8226; L^-1) decreased intracellular free Ca^2+ concentration. Verapamil (40μmol&# 8226 ;L^-1) and Phentolamine (1×10^-5mol&# 8226;L^-1) could partly abolish Lig-induced[Ca^2+]i decrease. Lig (30 μmol&# 8226; L^-1) could obviously inhibit the elevation of intracellular free Ca^2+ concentration which is induced by Phenylephrine (1×10^-4mol&# 8226 ; L^-1 ), A32187 (900 μmol&# 8226 ; L^-1 ) and Dobutamine (1×10^5mol&# 8226;L^-1). it has no effect to the effect binding site of AT-1R inhibitor Valsartan. Comclusion Lig decreased intracellular [Ca^2+ ]i of cardiac muscle by inhibiting α1-receptor, β1-receptor and L-type calcium channels of cell membrane. The relationship among them was to be approved.

关 键 词:川芎嗪 受体 钙通道 心肌 细胞内游离钙浓度 

分 类 号:G804.5[文化科学—运动人体科学]

 

参考文献:

正在载入数据...

 

二级参考文献:

正在载入数据...

 

耦合文献:

正在载入数据...

 

引证文献:

正在载入数据...

 

二级引证文献:

正在载入数据...

 

同被引文献:

正在载入数据...

 

相关期刊文献:

正在载入数据...

相关的主题
相关的作者对象
相关的机构对象