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Ranolazine is a piperazine derivative with cardioprotective activity.1,2,3,4 It reduces the late sodium current (INa) in mouse myocytes expressing the long QT syndrome 3 mutant sodium channel DKPQ, ventricular myocytes isolated from a canine model of heart failure, guinea pig ventricular myocytes exposed to hydrogen peroxide or anemone toxin-II, and HEK293 cells expressing human Nav1.5 channels (IC50s = 5.9-15 μM) as well as the late potassium current (IKr) in canine ventricular myocytes and HEK293 cells (IC50s = 11.5 and 14.4 μM, respectively).1,2 Ranolazine also inhibits radioligand binding to α1-, β1-, and β2-adrenergic receptors (Kis = 8.2-19.5, 1.4-8.6, and 0.5-14.8 μM, respectively).2 In vivo, ranolazine (480 μg/kg per min) reduces clofilium-induced prolongation of the QTc interval and Torsade de Pointes (TdP) in rabbits.3 Ranolazine also reduces interstitial collagen deposition as well as atrial natriuretic peptide (ANP; Item Nos. 24539 | 24276), connective tissue growth factor (CTGF), brain natriuretic peptide (BNP; Item No. 24541), and matrix metalloproteinase-2 (MMP-2) mRNA levels, and prevents left ventricular dilation in a mouse model of cardiotoxicity induced by doxorubicin (Item No. 15007).4
WARNING This product is not for human or veterinary use.
1. Inhibition of late sodium current to reduce electrical and mechanical dysfunction of ischaemic myocardium. Br. J. Pharmacol. 153(6), 1128-1132 (2008).
2. Mechanisms of ranolazine’s dual protection against atrial and ventricular fibrillation. Europace 15(3), 317-324 (2013).
3. Antitorsadogenic effects of (±)-
4. Ranolazine protects from doxorubicin-