Key result
In guinea-pig ventricular myocytes, beta-adrenergic stimulation with isoproterenol shifts L-type Ca2+ channel current decay from rapid voltage-dependent inactivation to Ca2+-induced inactivation.
Why the study?
Does beta-adrenergic stimulation modulate Ca2+- and voltage-dependent inactivation of L-type Ca2+ channel currents in guinea-pig ventricular myocytes?
Population
Guinea-pig isolated ventricular myocytes
Comparison
Beta-adrenergic stimulation with isoproterenol vs Control conditions
Design
Preclinical
Authors
Loading...
May refine understanding of adrenergic calcium channel modulation in animal models; leaves open translation to human myocytes or clinical relevance.
Does beta-adrenergic stimulation modulate Ca2+- and voltage-dependent inactivation of L-type Ca2+ channel currents in guinea-pig ventricular myocytes?
Beta-adrenergic stimulation shifts the mechanism of L-type calcium channel inactivation from voltage-dependent to calcium-induced in guinea-pig ventricular myocytes.
Ian Findlay (2002) studied this question. Beta-adrenergic stimulation (isoproterenol) vs. Control conditions was evaluated on Voltage- and Ca2+-induced inactivation of native cardiac L-type Ca2+ channels. In guinea-pig ventricular myocytes, beta-adrenergic stimulation with isoproterenol shifts L-type Ca2+ channel current decay from rapid voltage-dependent inactivation to Ca2+-induced inactivation.