Abstract
Adrenoceptors are a large family of seven membrane spanning G-protein coupled receptors involved in many regulatory processes of the heart. Under conditions of mechanical load to heart, i.e., pressure overload, an activation of the sympathetic nerve system leads direcdy to stimulation of receptors of this family. Especially α-adrenoceptors are constantly coupled to regulation of protein synthesis and their stimulation leads to an imbalance of protein synthesis and degradation causing myocardial hypertrophy. Moreover, events initially evoked by coactivation of the renin-angiotensin-system, including the activation of cytokines like TGF-β, are able to induce an additional coupling of β2-adrenoceptors to the regulation of protein synthesis, further favouring an imbalance of protein synthesis and degradation. Thus, several adrenoceptors are involved in a complex network of external and internal signals, finally leading to an adaptive response of the heart to mechanical load. The present review summarises our current understanding of these signal transduction pathways and their contribution to myocardial hypertrophy and heart failure.
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Schlüter, KD., Piper, H.M., Wenzel, S. (2007). The Role of Adrenoceptors in Mechanotransduction. In: Cardiac Mechanotransduction. Springer, New York, NY. https://doi.org/10.1007/978-0-387-48868-4_7
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DOI: https://doi.org/10.1007/978-0-387-48868-4_7
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