Key result
In rat ventricular myocytes, PDE3 and PDE4 are the dominant subtypes regulating basal L-type Ca2+ current, while all four PDE subtypes determine the response to cyclic AMP production stimulation.
Population
Isolated rat ventricular myocytes
Comparison
Phosphodiesterase inhibitors alone or in… vs Basal conditions or sub-maximal isoprenaline
Design
Preclinical
Authors
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Rat myocyte PDE data warrant no clinical translation yet; leaves open subtype-selective targeting for human arrhythmia research.
p-value: p=<0.01
PDE1-4 subtypes regulate L-type Ca2+ current in rat ventricular myocytes, with PDE3 and PDE4 being dominant under basal conditions.
Verde et al. (1999) studied Healthy (rat ventricular myocytes). Phosphodiesterase (PDE) inhibitors (IBMX, MIMX, EHNA, cilostamide, Ro 20-1724) vs. Control (basal conditions or isoprenaline alone) was evaluated on L-type Ca2+ current (ICa) amplitude (p=<0.01). In rat ventricular myocytes, PDE3 and PDE4 are the dominant subtypes regulating basal L-type Ca2+ current, while all four PDE subtypes determine the response to cyclic AMP production stimulation.
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