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Alteration of the expression of rat cardiac Gαq/11 and Giα2 proteins during endothelin-1 pre-treatment
Author(s): 
Pages: 459-462
Year: Issue:  6
Journal: ACTA PHYSIOLOGICA SINICA

Keyword:  G蛋白缺血-再灌注缺血预处理内皮素-1;
Abstract: 探讨内皮素-1预处理和缺血预处理两种预处理方式与G蛋白有关的信号转导途径的异同.用0.5 nmol/ml内皮素-1左心室注射或夹闭左冠状动脉5 min/再灌5 min×2进行预处理, 然后两组均缺血60 min, 再灌30 min.观察心电变化, 免疫印迹法测定心脏Gαq/11和Giα2的含量.结果显示, 无论是内皮素-1预处理还是缺血预处理均明显减轻缺血再灌注性室性心律失常.与对照组相比, 缺血预处理组Gαp/11含量升77.8%(P<0.05), Giα2含量无明显改变.内皮素-1预处理组Gαq/11含量升高110.6%(P<0.01), Giα2含量下降31.0% (P<0.05) .本研究结果提示, 激活Gαq/11蛋白是两种预处理对心肌产生保护作用的共同信号转导通路, 而Giα2蛋白在两种预处理中的作用方式有所不同.
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