Ca2+ Signaling and Heart Rhythm

Ca2+ is a key second messenger in the intricate workings of the heart. In cardiac myocytes, Ca2+ signaling controls or modulates electrophysiological function, excitation-contraction coupling, contractile function, energy balance, cell death, and gene transcription. Thus, diverse Ca2+-dependent regu...

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Bibliographic Details
Main Author: Christopher L.-H. Huang (auth)
Other Authors: Yunbo Ke (auth), R. John Solaro (auth), Ming Lei (auth)
Format: Book Chapter
Published: Frontiers Media SA 2016
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Online Access:Get Fullteks
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020 |a 978-2-88919-874-0 
020 |a 9782889198740 
024 7 |a 10.3389/978-2-88919-874-0  |c doi 
041 0 |a English 
042 |a dc 
100 1 |a Christopher L.-H. Huang  |4 auth 
700 1 |a Yunbo Ke  |4 auth 
700 1 |a R. John Solaro  |4 auth 
700 1 |a Ming Lei  |4 auth 
245 1 0 |a Ca2+ Signaling and Heart Rhythm 
260 |b Frontiers Media SA  |c 2016 
300 |a 1 electronic resource (133 p.) 
506 0 |a Open Access  |2 star  |f Unrestricted online access 
520 |a Ca2+ is a key second messenger in the intricate workings of the heart. In cardiac myocytes, Ca2+ signaling controls or modulates electrophysiological function, excitation-contraction coupling, contractile function, energy balance, cell death, and gene transcription. Thus, diverse Ca2+-dependent regulatory processes occur simultaneously within a cell. Yet, distinct signals can be resolved by local Ca2+ sensitive protein complexes and differential Ca2+ signal integration. In addition to its importance to normal cardiac function, such regulation is also crucial in disease conditions. Ca2+ is likely involved in ectopic cardiac rhythms in both atrial and ventricular tissues through generating triggered activity often appearing as delayed afterdepolarisations, particularly following cellular Ca overloading. Recent studies also implicate Ca2+ in Na+ channel expression and properties with consequences for conduction velocity and therefore arrhythmic substrate. At the cellular level, such regulation involves control of the activity of membrane ion channels and Ca2+ handling proteins. These in turn involve multiple extra- and intracellular signaling pathways. This e-book assembles review and original articles from experts in this field. It summarises major recent progress bearing on roles of Ca2+ in cardiac electrophysiological function encompassing both normal and abnormal cardiac function. These extend from physiological roles of Ca2+ signaling in pacemaker function, in particular generation of sino-atrial pacemaker potentials, to pathological roles of abnormal Ca2+ signaling in both atrial and ventricular arrhythmogenesis. It also seeks to bridge the gap between advances in basic science and development of new therapies. 
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546 |a English 
653 |a Heart 
653 |a Pak1 
653 |a SA node 
653 |a STIM1 
653 |a TRPC 
653 |a Ca2+ 
653 |a Orai1 
653 |a PP2A 
653 |a voltage gated Ca2+ channels 
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