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Integration between M3 muscarinic acetylcholine receptor and connexin 43 as antiarrhythmic targets in rat ventricular myocardium
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 5
- DOI:
- 10.3321/j.issn:0513-4870.2006.05.003
- Key Word:
- 心室肌细胞膜;M受体;间隙连接蛋白43;结构整合
Abstract： 目的在蛋白质分子水平研究心律失常相关蛋白质M3受体与间隙连接蛋白43之间的结构相互作用,并为其作为筛选药物靶点提供依据.方法通过免疫组化结合激光共聚焦显微镜,及免疫沉淀与免疫印迹技术,研究M受体与间隙连接蛋白43的结构性共定位关系.结果证实了大鼠心室肌细胞膜蛋白中M1～M5等5个亚型的存在;观察到大鼠单个心肌细胞膜上M3受体与间隙连接蛋白43的结构性共定位;发现M受体各亚型与间隙连接蛋白43均存在结构整合,且一定浓度离子型去垢剂可破坏M3受体与间隙连接蛋白43的结构整合关系,并进一步发现参与M3受体结构整合的是间隙连接蛋白43的磷酸化形式.结论大鼠心室肌M受体亚型与间隙连接蛋白43的磷酸化形式存在结构性共定位关系,且可被一定浓度离子型去垢剂破坏.
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