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GS967 (GS-458967) is a highly selective late sodium channel current blocker.
In vitro: GS967 (10, 100, 300 nM) completely attenuates the effect of ATX-II (10 nM) to increase action potential duration (APD) and APD variability in ventricular myocytes, with an apparent IC50 value of ∼10 nM and decreased the beat-to-beat variability of APD.
In vivo: GS967 causes a reduction of INaP in a frequency-dependent manner, consistent with use-dependent block (UDB). GS967 evokes more potent UDB of INaP (IC50=0.07 μM) than ranolazine (16 μM) and lidocaine (17 μM). GS967 is found to exert these same effects on a prototypical long QT syndromemutation (delKPQ). GS967 prevents ischemia-induced increases in alternans in the left atrium and left ventricle. GS967 reduces ischemia-induced increases in depolarization heterogeneity and repolarizationheterogeneity.
| Molecular Weight | 347.22 |
| Formula | C14H7F6N3O |
| CAS Number | 1262618-39-2 |
| Solubility (25°C) | DMSO 40 mg/mL Ethanol 40 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
[1] Potet F, et al. Mol Pharmacol. Use-Dependent Block of Human Cardiac Sodium Channels by GS967.
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