Safinamide Mesylate is mesylate salt of Safinamide, which selectively and reversibly inhibits MAO-B with IC50 of 0.45 μM. Safinamide inhibits glutamate release induced by depolarizing conditions in rat hippocampal synaptosomes with IC50 of 9 μM. Safinamide increases neostriatal dopamine concentration. In addition, safinamide is voltage-dependent sodium and calcium channel blocker. Safinamide blocks N and L-type calcium channels and inhibits glutamate and aspartate release from synaptic terminals. Safinamide significantly inhibits cell body degeneration in the substantia nigra pars compacta. Safinamide has a high oral bioavailability (80–92%), is rapidly absorbed in plasma after reaching the peak within 0.5–2 hours declines, with a terminal half-life of about 3, 7, and 13 hours in mice, rats, and monkeys, respectively. Safinamide is currently in a Phase II clinical trial.
Molecular Weight | 398.45 |
Formula | C17H19FN2O2.CH4O3S |
CAS Number | 202825-46-5 |
Solubility (25°C) | DMSO 80 mg/mL Water 30 mg/mL |
Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
[2] Daniel A Hussar, et al. Safinamide mesylate, Brodalumab, Guselkumab, and Abaloparatide
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