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Sphingosine kinase (SphK) is a key enzyme in the synthesis of sphingosine 1-phosphate (S1P), a bioactive sphingolipid. SphK is involved in ischemic preconditioning (IPC). To date no studies in genetically altered animals have examined the role of SphK1 in myocardial ischemia/reperfusion (IR) injury and IPC.Wild-type and SphK1 null mouse hearts were subjected to IR (50 min global ischemia and 40 min...
N, N-Dimethylsphingosine (DMS) is recognized as an inhibitor of sphingosine kinase (SphK), a key enzyme responsible for the formation of sphingosine-1-phosphate (S1P). We previously showed that S1P was cardioprotective and that SphK was critical for myocardial ischemic preconditioning. Although DMS is an endogenous sphingolipid, its effect on cardiac function and cardioprotection at low concentration...
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