ß-Adrenergic Stimulation Increases RyR2 Activity via Intracellular Ca²⁺ and Mg²⁺ Regulation
Here we investigate how ß-adrenergic stimulation of the heart alters regulation of ryanodine receptors (RyRs) by intracellular Ca(2+) and Mg(2+) and the role of these changes in SR Ca(2+) release. RyRs were isolated from rat hearts, perfused in a Langendorff apparatus for 5 min and subject to 1 min perfusion with 1 µM isoproterenol or without (control) and snap frozen in liquid N2 to capture their phosphorylation state. Western Blots show that RyR2 phosphorylation was increased by...[Show more]
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