113558-89-7

E-4031 (113558-89-7) is a selective hERG potassium channel blocker. Inhibits the rapid delayed-rectifier K+ current (IKr). Class III antiarrhythmic agent. Cell permeable.

ChEBI: E-4031 is a sulfonamide.

it has been reported that e-4031 could induce eads or tdp, and such induction correlated with a significant increase in variability of repolarization. in addition, e-4031 at 0.1 um was able to significantly prolong cycle length, action potential duration, and depolarized maximum diastolic potential. e-4031could also reduce the upstroke velocity of the action potential as well as the diastolic depolarization rate [1].

animal study showed that e-4031 at 0.01 and 0.1 mg/kg could provide effective in-vitro plasma concentrations to significantly inhibit ikr and thus delayed the repolarization beyond the initiation of diastole, leading to the inversion of electro-mechanical coupling, which provides an ideal proarrhythmic substrate [2]. another sutdy found that e-4031 could prolong qt interval and ari in all lv layers, though the magnitude of prolongation was greatest in mid, particularly during bradycardia [3].

7.7 nm for herg

1) Ficker et al. (2002), The binding site for channel blockers that rescue misprocessed human long QT syndrome type 2 ether-a-gogo gene (HERG) mutations; J. Biol. Chem., 277 4989 2) Wettwer et al. (1991), Effects of the new class III antiarrhythmic drug E-4031 on myocardial contractility and electrophysical parameters; J. Cardiovasc. Pharmacol., 17 480