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Sematilide (CK-1752) hydrochloride is a novel class III antiarrhythmic agent. Sematilide inhibits the rapidly activating delayed rectifier K+ current. The Ca2+-independent transient K+ and the inward rectifier K+ currents were not affected significantly by application of 100 microM sematilide. Moreover, voltage-dependent Na+ and Ca2+ currents were not affected significantly by 100 microM sematilide.
These findings indicate that sematilide selectively blocks the rapidly activating delayed rectifier K+ current in atrial myocytes and provide evidence supporting the usefulness of the drug as a class III antiarrhythmic agent. Application of 10, 30, 100 and 300 microM sematilide caused a concentration-dependent inhibition of the delayed rectifier K+ current (IC50 approx. 25 microM).
| Molecular Weight | 349.87 |
| Formula | C14H24ClN3O3S |
| CAS Number | 101526-62-9 |
| Form | Solid |
| Solubility (25°C) | DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Related Potassium Channel Products |
|---|
| TAK-438
TAK-438 is a novel and potent potassium-competitive acid blocker (P-CAB) with IC50 of 19 nM. |
| ML133 hydrochloride
ML133 hydrochloride is a selective inhibitor of the Kir2 family of inward rectifier (IRK, KCNJ) potassium channels. |
| Doxapram hydrochloride hydrate
Doxapram hydrochloride hydrate inhibits TASK-1, TASK-3, TASK-1/TASK-3 heterodimeric channel function with EC50 of 410 nM, 37 μM, 9 μM, respectively. |
| Gliquidone
Gliquidone is an ATP-sensitive K+ channel antagonist with IC50 of 27.2 nM. |
| Pinacidil monohydrate
Pinacidil monohydrate is known to augment a time-independent outward current in cardiac tissues by activating the ATP-regulated potassium channels. |
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