Ivabradin is a newly accredited substance from the group of bradycardic agents, which was analysed in the context of this work. With help of the patch-clamp method, the effect of this pharmaceutical on ionic currents through HCN channels was studied, whereby the blocking effect of Ivabradine on these cardiac pacemaker channels could be shown for the first time. The obtained dose-response characteristics of Ivabradine do not show any preference for one of the investigated ion channel subtypes (HCN1, HCN2 and HCN4). It also was possible to make a statement on the influencing factors on the Ivabradin effect: The involvement of multiple binding domains in the effect of Ivabradine showed to be improbable. Instead, a dependency of the blockade on the intensity of channel activation was observed, which was supposed to be the determining factor for the intensity of the Ivabradine effect.
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Ivabradin is a newly accredited substance from the group of bradycardic agents, which was analysed in the context of this work. With help of the patch-clamp method, the effect of this pharmaceutical on ionic currents through HCN channels was studied, whereby the blocking effect of Ivabradine on these cardiac pacemaker channels could be shown for the first time. The obtained dose-response characteristics of Ivabradine do not show any preference for one of the investigated ion channel subtypes (HC...
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