© 2003 by European Society of Cardiology
Copyright © 2003, European Society of Cardiology
NO and cholinergic signalling in the heart: divergent routes to regulatory phosphorylation of the cardiac L-type Ca2+ channel
Department of Pharmacology and Toxicology, SFB-Biomembranes Research Center, Karl-Franzens-University, Universitätsplatz 2, A-8010, Graz, Austria
*Tel.: +43-316-380-5570; fax: +43-316-380-9890. Email address: klaus.groschner@uni-graz.at
Received 27 August 2003;
| The first 10% of the full text of this article appears below. |
| 1. Introduction |
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Voltage-gated cardiac L-type channels (CaV1.2a) are a pivotal signalling element involved in the control of myocardial function by the autonomic nervous system. Dual control of Ca2+ entry into cardiac myocytes by sympathetic and parasympathetic stimuli is likely to converge on reversible phosphorylation of CaV1.2a channels, a process that is governed by cyclic nucleotide-dependent protein kinases. The molecular basis of this regulation, and in particular the role cGMP-dependent phosphorylation in cholinergic suppression of Ca2+ entry, is still obscure. In this issue of Cardiovascular Research, Schröder et al. [1] report that transgenic over-expression of cGMP-dependent kinase I (PKG I) promotes the inhibitory modulation of cardiac Ca2+ channels by the
| 2. A transgenic animal model challenges the "yin-yang" hypothesis |
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| 3. PKG-I may control Cav1.2 channels via multiple target sites |
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