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Modulation of Cardiac Contractility by the Phopholamban/SERCA2a Regulatome
Open accessAbstract
Heart disease remains the leading cause of death and disability in the Western world. Current therapies aim at treating the symptoms rather than the subcellular mechanisms, underlying the etiology and pathological remodeling in heart failure. A universal characteristic, contributing to the decreased contractile performance in human and experimental failing hearts, is impaired calcium sequestration into the sarcoplasmic reticulum (SR). SR calcium uptake is mediated by a Ca 2+ -ATPase (SERCA2), whose activity is reversibly regulated by phospholamban (PLN). Dephosphorylated PLN is an inhibitor of SERCA and phosphorylation of PLN relieves this inhibition. However, the initial simple view of a PLN/SERCA regulatory complex has been modified by our recent identification of SUMO, S100 and the histidine-rich Ca-binding protein as regulators of SERCA activity. In addition, PLN activity is regulated by 2 phosphoproteins, the inhibitor-1 of protein phosphatase 1 and the small heat shock protein 20, which affect the overall SERCA-mediated Ca-transport. This review will highlight the regulatory mechanisms of cardiac contractility by the multimeric SERCA/PLN-ensemble and the potential for new therapeutic avenues targeting this complex by using small molecules and gene transfer methods.
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A peptide encoded by a transcript annotated as long noncoding RNA enhances SERCA activity in muscle
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Thyroid hormones and cardiovascular disease
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Metadata
- Authors
- Kranias, E. G., & Hajjar, R. J.
- Venue
- Circulation Research
- Published
- 2012-06-08
- Volume
- 110
- Issue
- 12
- Pages
- 1646-1660
- ISSN
- 0009-7330 (ISSN-L)
- 1524-4571
- OpenAlex
- W2158714558
- Cited by
- 532
- References
- 109
- FWCI
- 25.32
- Type
- journal article
- Language
- en
- Open access
- bronze
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