Key result
Complete deactivation of PKA-regulated cardiac Cl- conductance requires dephosphorylation by type 1 and/or 2A phosphatases, while partial deactivation can occur via other phosphatases.
Population
Isolated guinea pig ventricular myocytes
Design
Preclinical
Authors
Loading...
May inform phosphatase roles in cardiac Cl- regulation; hypothesis-generating with no direct clinical implications yet.
The study demonstrates that PKA-regulated cardiac Cl- conductance involves sequential phosphorylation at two distinct sites, requiring different phosphatases for complete deactivation.
Hwang et al. (1993) studied this question. Forskolin, isoproterenol, okadaic acid, microcystin was evaluated on Cl- conductance. Complete deactivation of PKA-regulated cardiac Cl- conductance requires dephosphorylation by type 1 and/or 2A phosphatases, while partial deactivation can occur via other phosphatases.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: