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- W2789467490 abstract "Acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) are key cholinesterase enzymes responsible for the hydrolysis of acetylcholine into choline and acetic acid, an essential process for the restoration of the cholinergic neuron. The loss of cholinergic function in the central nervous system contributes to the cognitive decline associated with advanced age and Alzheimer's disease (AD). Inhibitions assays represent a significant role in the drug discovery process. Herein, we describe an improved label free method to screen and characterize new BChE ligands. The liquid chromatography system uses an immobilized capillary enzyme reactor (ICER) as a low affinity and high selectivity column coupled to a mass spectrometer (MS). The enzyme activity was evaluated by monitoring the choline's precursor ion [M + H]+m/z 104 for a brief period. The method was validated using two known cholinesterase inhibitors tacrine and galanthamine. The IC50 values were 0.03 ± 0.006 μM and 0.88 ± 0.2 for tacrine and galanthamine respectively, and Ki was 0.11 ± 0.2 for galanthamine. The efficient combination of the huBChE-ICER with sensitive enzymatic assay detection such as MS, improved the reliable, fast identification of new ligands. Moreover, specific direct quantitation of the product contributes to the reduction of false positive and negative results." @default.
- W2789467490 created "2018-03-29" @default.
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- W2789467490 date "2018-05-01" @default.
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- W2789467490 title "An improved immobilized enzyme reactor-mass spectrometry-based label free assay for butyrylcholinesterase ligand screening" @default.
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- W2789467490 doi "https://doi.org/10.1016/j.ab.2018.03.012" @default.
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