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Ca(2+) /calmodulin-dependent protein kinase II equally induces sarcoplasmic reticulum Ca(2+) leak in human ischaemic and dilated cardiomyopathy.
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Abstract
The sarcoplasmic reticulum (SR) Ca(2+) leak is an important pathomechanism in heart failure (HF). It has been suggested that Ca(2+) /calmodulin-dependent protein kinase II (CaMKII) is only relevant for the induction of the SR Ca(2+) leak in non-ischaemic but not in ischaemic HF. Therefore, we investigated CaMKII and its targets as well as the functional effects of CaMKII inhibition in human ischaemic cardiomyopathy (ICM, n = 37) and dilated cardiomyopathy (DCM, n = 40).