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CAS No. : 130656-51-8
MCE 国际站:Nifekalant hydrochloride
产品活性:Nifekalant hydrochloride (MS-551) ,一种 III 类抗心律不齐化合物,是 IKr 钾通道阻滞剂,IC50 为10 µM。Nifekalant hydrochloride 可用于快速室上性心律失常的研究。
研究领域:Membrane Transporter/Ion Channel
作用靶点:Potassium Channel
In Vitro: Nifekalant interacts with the cardiac M2 and the peripheral M3 receptors with a Ki value of 27 and 74 mM, respectively. Nifekalant dose dependently blocks HERG channels with an IC50 value of 7.9 mM, but Nifekalant does not block minK currents in the Xenopus oocyte expression system. Nifekalant blocks HERG channels mainly in their open state in a frequency dependent manner. As a pure K+ channel blocker, Nifekalant does not have negative inotropic effects which amiodarone has via a β-blocking action and does not affect cardiac conduction.
In Vivo: In rats (a species deficient in functional cardiac IK), before coronary ligation, 3 mg/kg and 10 mg/kg MS-551 decreased the heart rate by 6% and 12%, and increased mean arterial pressure (MAP) by 14% and 33%, respectively. MS-551 prolongs the QT interval and reduced the incidence of sustained ventricular fibrillation (VF) after reperfusion.
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