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Acetycholinesterase (AChE) that regulates hydrolysis of acetylcholine (ACh) in the brain, is an important target for treatment of Alzheimer's disease (AD), a feature of which is ACh deficiency. However, the methods to precisely determine AChE activity are still under development. We developed a new method to exploit acetylcholine‐d4 as a surrogate substrate of ACh and measure product choline‐d4 via...
A simple, robust and specific liquid chromatography tandem mass spectrometry (LC‐MS/MS) method was developed and validated to determine the concentration of corticosterone (Cort) which is usually regarded as a stress biomarker in mouse serum. Since Cort is an endogenous hormone, a ‘surrogate analyte’ strategy was adopted using the stable isotope‐deuterated corticosterone as a surrogate of the authentic...
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