Abstract
Intracellular Ca(2+) release channels, such as inositol 1,4,5-trisphosphate receptors (IP(3)Rs) and ryanodine receptors (RyRs), facilitate the release of Ca(2+) from intracellular storage organelles in response to extracellular and intracellular stimuli. Consequently, these large, tetrameric proteins play a central role in Ca(2+) signalling and Ca(2+) homeostasis in virtually all cells. Recent data suggests that intracellular Ca(2+) release channels may also have an important pathophysiological function in certain disease states, including cardiac arrhythmias and heart failure. As a result, there has been much interest in the identification and characterization of novel, selective regulators of these channels. In this article, we review the wide array of pharmacological agents that interact directly with intracellular Ca(2+) release channels and describe the mechanisms underlying their ability to modify channel function.
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