β-Adrenergic stimulation increases cAMP in cardiac cells to induce PKA-mediated phosphorylation of various proteins regulating heart function, such as the L-type Ca 2+ channels which carry I Ca,L and trigger cardiac ...

Compartmentation of cAMP is thought to generate the specificity of Gs-coupled receptor action in cardiac myocytes, with phosphodiesterases (PDEs) playing a major role in this process by preventing cAMP diffusion. We tested ...