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AP14145 hydrochloride is a potent KCa2 (SK) channel negative allosteric modulator with an IC50 of 1.1 μM for KCa2.2 (SK2) and KCa2.3 (SK3) channels. AP14145 hydrochloride inhibition strongly depends on two amino acids, S508 and A533 in the channel. AP14145 hydrochloride prolonged atrial effective refractory period (AERP) in rats and demonstrates antiarrhythmic effects in a Vernakalant-resistant porcine model of atrial fibrillation (AF)[1][2]. | [Biological Activity]
AP 14145 hydrochloride is a KCa2 (small conductance Ca2+-activated potassium) channel negative allosteric modulator (IC50 = 1.1 μM). Increases the EC50 of Ca2+ on KCa2.3 channels by ~3-fold. Prolongs atrial effective refractory period (AERP) in rats. Reduces atrial fibrillation (AF) duration and prolongs atrial refractoriness without affecting ventricular refractory period in an animal AF model. | [in vivo]
AP14145 (10 μM) increases the duration of the atrial effective refractory period (AERP) in isolated perfused rat hearts[1].
AP14145 (2.5 and 5 mg/kg; bolus injections (iv)) increases the duration of the atrial effective refractory period in male sprague-dawley rats (250-350 g, 1-3 months old)[1].
AP14145 (5 mg/kg; bolus injections) has a Cmax of 8355 nmol/L, a t of 24.3 minutes in landrace pigs (12-13 weeks old, 30-35 kg gilts)[2].
| [storage]
Store at -20°C | [References]
[1] Rafel Simó-Vicens, et al. A New Negative Allosteric Modulator, AP14145, for the Study of Small Conductance Calcium-Activated Potassium (KCa2) Channels. Br J Pharmacol. 2017 Dec;174(23):4396-4408. DOI:10.1111/bph.14043
[2] Jonas Goldin Diness, et al. Termination of Vernakalant-Resistant Atrial Fibrillation by Inhibition of Small-Conductance Ca2+-Activated K + Channels in Pigs. Circ Arrhythm Electrophysiol. 2017 Oct;10(10):e005125. DOI:10.1161/CIRCEP.117.005125 |
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