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Cat. No. M8888
Donepezil Structure


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100mg USD 162  USD180 In stock
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Quality Control
Biological Activity

Donepezil(E 2020) is a specific and potent AChE inhibitor for bAChE and hAChE with IC50 of 8.12 nM and 11.6 nM, respectively.

Donepezil has reversible and noncompetitive inhibition effects on AChE. It has 500-1000-fold more selective for AChE over butyrylcholinesterase (BuChE). Short- and long-exposure of SH-SY5Y human neuroblastoma cells to donepezil induces a concentration-dependent inhibition of cell proliferation unrelated to muscarinic or nicotinic receptor blockade or apoptosis. Donepezil reduces the number of cells in the S-G2/M phases of the cell cycle, increases the G0/G1 population, and reduces the expression of two cyclins of the G1/S and G2/M transitions, cyclin E and cyclin B, in parallel with an increase in the expression of the cell cycle inhibitor p21.

Donepezil is metabolized in the liver via the cytochrome P450 system (CYP1A2-, CYP2D6-, CYP3A4-related enzymes). In animals, donepezil is found unchanged in brain, and no metabolites are detected in the nervous tissue. In plasma, urine, and bile, most donepezil metabolites are O-glucuronides. After oral ingestion, peak plasma concentrations are achieved in 3-5 hours and its absortion is not affected by food. Donepezil has linear pharmacokinetics over a dose range of 1-10 mg/day. 96% of circulating donepezil is protein bound.

Cell Experiment
Cell lines retinal ganglion cells (RGCs)
Preparation method RGC survival after exposure to each reagent (glutamate, donepezil, tacrine, galanthamine, and HA14-1) is measured by calcein-AM staining after 3 days in culture, Briefly, cells are incubated in 1 μM calcein-AM in PBS for 15 minutes at 37℃. After the medium is replaced with fresh PBS, cells are examined under a fluorescence microscope using a fluorescein filter. The total number of surviving RGCs defined as cells with a calcein-AM stained cell body and a process extending at least two cell diameters from the cell body is counted in each well. The number of surviving RGCs without any drug served as a control.
Concentrations 100 nM-10 μM
Incubation time 3 days
Animal Experiment
Animal models Age-matched (10-12 weeks old, 21–24 g) male C57BL/6 wild-type and CGRP(−/−) mice
Formulation added to the food powder
Dosages 1.5 mg/kg
Administration oral
Conversion of different model animals based on BSA (Value based on data from FDA Draft Guidelines)
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 resveratrol used for a mouse (22.4 mg/kg) to a dose based on the BSA for a rat, multiply 22.4 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 resveratrol of 11.2 mg/kg.

Chemical Information
Molecular Weight 379.49
Formula C24H29NO3
CAS Number 120014-06-4
Purity 100.0%
Solubility DMSO: 70 mg/mL
Storage at -20°C

Donepezil in Alzheimer's disease: From conventional trials to pharmacogenetics.
Cacabelos R. Neuropsychiatr Dis Treat. 2007 Jun;3(3):303-33. PMID: 19300564.

Protective effect of donepezil on retinal ganglion cells in vitro and in vivo.
Miki A, et al. Curr Eye Res. 2006 Jan;31(1):69-77. PMID: 16421021.

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Keywords: Donepezil, E2020 supplier, AChR/AChE, inhibitors

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