蛋白激酶C在心肌预适应中的作用机制

Mechanisms of action of protein kinase C in myocardial preconditioning

心肌预适应后 ,内源性物质释放 ,分别作用于心肌中与G蛋白耦联的相应受体 ,蛋白激酶C激活并转位至细胞膜及细胞骨架 ,并可通过线粒体KATP通道、MAPK等通路引发心肌保护作用。在不同的动物中 ,分别发现不同的蛋白激酶C亚型激活转位。目前公认 :在参与心肌预适应过程的多种因素中 ,PKC起到了关键性作用 。

PKC plays a pivotal role in the mechanism of myocardial preconditioning. After preconditioning, PKC is activated and translocated to membranes and cytoskeleton structures by multiple endogenous substances such as adenosine, calcium, etc. Recent studies imply that MAPK carries the signal from PKC to the mitochondria K ATP channel and thus protect the heart.