Key result
Review details coordinated L-type and ryanodine calcium channel mechanisms in cardiac excitation-contraction coupling.
This review summarizes the fundamental physiological roles of L-type and ryanodine-sensitive calcium channels in cardiac excitation-contraction coupling.
Reinforces calcium channel coordination in EC coupling; extends mechanistic research but leaves clinical translation open.
The contractile state of cardiac muscle cell is determined by the level of calcium in the cytosol. Each action potential produces a transient elevation of cytosolic calcium. The interaction of calcium ions with the contractile elements of the cell initiates a series of events which culminate in cell shortening. The process by which cell excitation is coupled to contraction involves the function of two distinct species of calcium-selective membrane ion channel; the L-type, dihydropyridine-sensitive calcium channel of the cell surface membrane or sarcolemma and the ryanodine-sensitive calcium-release channel of the sarcoplasmic reticulum intracellular membrane network. The aim of this article is to provide information on the properties of these channels and to discuss the mechanisms involved in the coordination of their function in the coupling of cardiac muscle cell excitation to contraction.
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Alan J. Williams (1997) conducted a review in Cardiac muscle excitation-contraction coupling. Calcium channels (L-type and ryanodine-sensitive) was evaluated. This review discusses the properties of L-type and ryanodine-sensitive calcium channels and their coordinated mechanisms in cardiac muscle excitation-contraction coupling.
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