Key result
AZD7009 delays repolarization and increases refractoriness in atrial tissue through synergistic inhibition of IKr, Ito, IKur and INa, while inhibiting late sodium current to prevent proarrhythmia.
Why the study?
Does AZD7009 inhibit specific cardiac ion currents and modulate action potential duration in mammalian cells and rabbit cardiac tissue?
Population
Mammalian cells expressing human cardiac ion channels, isolated rabbit atrial and ventricular myocytes, and…
Comparison
AZD7009 at various concentrations vs Control conditions and exposure to the selective…
Design
Preclinical
Authors
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Supports preclinical development of multi-channel blockers for AF; leaves open human efficacy and safety.
Does AZD7009 inhibit specific cardiac ion currents and modulate action potential duration in mammalian cells and rabbit cardiac tissue?
AZD7009 exhibits a mixed ion channel blockade that delays repolarization in atrial tissue while inhibiting late sodium current to counteract excessive APD prolongation in susceptible ventricular cells, explaining its high antiarrhythmic efficacy and low proarrhythmic potential.
Frida Persson (2007) studied Atrial fibrillation. AZD7009 vs. Control / E 4031 was evaluated on Effect on cardiac ion currents and action potential duration. AZD7009 delays repolarization and increases refractoriness in atrial tissue through synergistic inhibition of IKr, Ito, IKur and INa, while inhibiting late sodium current to prevent proarrhythmia.
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