Molecular Modelling and QSAR of Reversible Acetylcholines-terase Inhibitors

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Abstract:

Acetylcholinesterase (AChE) inhibitors are an important class of medicinal agents useful for the treatment of Alzheimers disease, glaucoma, myasthenia gravis and for the recovery of neuromuscular block in surgery. To rationalize the structural requirements of AChE inhibitors we attempt to derive a coherent AChE-inhibitor recognition pattern based on literature data of molecular modelling and quantitative structure-activity relationship (QSAR) analyses. These data are summarised from nearly all therapeutically important chemical classes of reversible AChE inhibitors, e.g., derivatives of physostigmine, tacrine, donepezil and huperzine A. Interactions observed from X-ray crystallography between these inhibitors and AChE have also been incorporated and compared with modelling and QSAR results. It is concluded that hydrophobicity and the presence of an ionizable nitrogen are the pre-requisites for the inhibitors to interact with AChE. However the mode of interaction i.e., the 3-dimensional (3D) positioning of the inhibitor in the active site of the enzyme varies among different chemical classes. It is also recognised that water molecules play crucial roles in defining these different 3D positioning. The information on AChE-inhibitor interactions provided should be useful for future discovery of new chemical classes of AChE inhibitors, especially from De Novo design and hybrid construction.
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  • Current Medicinal Chemistry covers all the latest and outstanding developments in medicinal chemistry and rational drug design. Each issue contains a series of timely in-depth reviews written by leaders in the field covering a range of the current topics in medicinal chemistry. Current Medicinal Chemistry is an essential journal for every medicinal chemist who wishes to be kept informed and up-to-date with the latest and most important developments.
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