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Nat Clin Pract Cardiovasc Med. 2008 Sep;5(9):554-65. doi: 10.1038/ncpcardio1301. Epub 2008 Jul 29.

The cardiac sarcoplasmic/endoplasmic reticulum calcium ATPase: a potent target for cardiovascular diseases.

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  • 1Mount Sinai School of Medicine, New York, NY 10029, USA.

Abstract

The cardiac isoform of the sarcoplasmic/endoplasmic reticulum calcium ATPase (SERCA2a) is a calcium ion (Ca(2+)) pump powered by ATP hydrolysis. SERCA2a transfers Ca(2+) from the cytosol of the cardiomyocyte to the lumen of the sarcoplasmic reticulum during muscle relaxation. As such, this transporter has a key role in cardiomyocyte Ca(2+) regulation. In both experimental models and human heart failure, SERCA2a expression is significantly decreased, which leads to abnormal Ca(2+) handling and a deficient contractile state. Following a long line of investigations in isolated cardiac myocytes and small and large animal models, a clinical trial is underway that is restoring SERCA2a expression in patients with heart failure by use of adeno-associated virus type 1. Beyond its role in contractile abnormalities in heart failure, SERCA2a overexpression has beneficial effects in a host of other cardiovascular diseases. Here we describe the mechanism of Ca(2+) regulation by SERCA2a, examine the beneficial effects as well as the failures, risks and complexities associated with SERCA2a overexpression, and discuss the potential of SERCA2a as a target for the treatment of cardiovascular disease.

PMID:
18665137
[PubMed - indexed for MEDLINE]
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