Stimulation of β‐adrenergic receptors (βARs) provides the most efficient physiological mechanism to enhance contraction and relaxation of the heart. Activation of βARs allows rapid enhancement of myocardial function in order to fuel the muscles for running and fighting in a fight‐or‐flight response. Likewise, βARs become activated during cardiovascular disease in an attempt to counteract the restrictions of cardiac output. However, long‐term stimulation of βARs increases the likelihood of cardiac arrhythmias, adverse ventricular remodelling, decline of cardiac performance and premature death, thereby limiting the use of βAR agonists in the treatment of heart failure. Recently the endogenous Raf kinase inhibitor protein (RKIP) was found to activate βAR signalling of the heart without adverse effects. This review will summarize the current knowledge on RKIP‐driven compared to receptor‐mediated signalling in cardiomyocytes. Emphasis is given to the differential effects of RKIP on β1‐ and β2‐ARs and their downstream targets, the regulation of myocyte calcium cycling and myofilament activity.
Raf kinase inhibitor protein: lessons of a better way for β‐adrenergic receptor activation in the heart
K. Lorenz,M. Rosner,Theresa Brand,J. Schmitt
Published 2017 in Journal of Physiology
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- Publication year
2017
- Venue
Journal of Physiology
- Publication date
2017-04-01
- Fields of study
Biology, Medicine
- Identifiers
- External record
- Source metadata
Semantic Scholar, PubMed
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