Otro
Electrogravimetric Analysis by Quartz-Crystal Microbalance on the Consumption of the Neurotransmitter Acetylcholine by Acetylcholinesterase
Registro en:
Analytical Letters, v. 46, n. 2, p. 258-265, 2012.
0003-2719
1532-236X
10.1080/00032719.2012.713065
WOS:000312984400004
2-s2.0-84871859504
Autor
Bueno, Paulo Roberto
Gonçalves, Luís M.
dos Santos, Fernanda C.
dos Santos, Marcio L.
Barros, Aquiles A.
Faria, Ronaldo C.
Resumen
Electrogravimetric analysis was performed on the consumption of the neurotransmitter Acetylcholine (ACh) by Acetylcholinesterase (AChE) in situ and in real time. Michaelis-Menten assumption was achieved by using an enzyme micro-reactor in which the total enzyme was anchored in a quartz crystal microbalance chip (QCM-chip) with a strategically engineered self-assembled monolayer (SAM) of alkanethiols, which can prevent diffusion-controlled or spatially restricted kinetics. The real-time frequency changes indicated the rate of the products formation from enzymatic reaction. The QCM-chip was tested showing that it could demonstrate AChE inhibition by physostigmine. © 2013 Copyright Taylor and Francis Group, LLC.