Nefiracetam is cognitive enhancer with an IC50 of approximately 150–200 μM for Ro 5-4864. It displays various pharmacological effects. It activates L/N-type calcium channels, cholinergic, monoaminergic and GABAergic systems. It displays potent neuroprotective action in the retinal ischemia-reperfusion model in vivo.
Cell Experiment | |
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Cell lines | Oocytes |
Preparation method | Transferring the injected oocytes to the recording chamber 24 to 48 hours after incubation and continuously superfused at room temperature (20 to 22 °C) in a standard frog Ringer's solution (115 mM NaCl, 2 mM KCl, 1.8 mM CaCl2, and 5 mM HEPES, pH 7.0). Ca2+ -free extracellular solution consisted of 115 mM NaCl, 2 mM KCl, 5 mM MgCl2, 5 mM HEPES, and 1 mM EGTA, pH 7.0. To remove the effect of the muscarinic ACh receptor, adding 1 μM atropine the extracellular solution. Using two-electrode, voltage-clamp techniques to record ACh-activated currents. Analyzing the currents on a microcomputer using pClamp software. ACh is bath-applied to oocytes. Nefiracetam is dissolved in distilled water at 1 mM for stock solution and diluted into concentrations which are required with the extracellular solution. |
Concentrations | ~1 μM |
Incubation time | 24 hours - 48 hours |
Animal Experiment | |
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Animal models | Adult male EL mice weighing 25–30 g and adult male DDY mice |
Formulation | |
Dosages | |
Administration | Administered via i.v. or p.o. |
Molecular Weight | 246.3 |
Formula | C14H18N2O2 |
CAS Number | 77191-36-7 |
Solubility (25°C) | DMSO 25 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.
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