New 3-O-substituted xanthone derivatives as promising acetylcholinesterase inhibitors
Autor: | Zi Han Loh, Huey Chong Kwong, Kok Wai Lam, Soek Sin Teh, Gwendoline Cheng Lian Ee, Ching Kheng Quah, Anthony Siong Hock Ho, Siau Hui Mah |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: | |
Zdroj: | Journal of Enzyme Inhibition and Medicinal Chemistry, Vol 36, Iss 1, Pp 627-639 (2021) |
Druh dokumentu: | article |
ISSN: | 1475-6366 1475-6374 14756366 |
DOI: | 10.1080/14756366.2021.1882452 |
Popis: | A new series of 3-O-substituted xanthone derivatives were synthesised and evaluated for their anti-cholinergic activities against acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). The results indicated that the xanthone derivatives possessed good AChE inhibitory activity with eleven of them (5, 8, 11, 17, 19, 21-23, 26-28) exhibited significant effects with the IC50 values ranged 0.88 to 1.28 µM. The AChE enzyme kinetic study of 3-(4-phenylbutoxy)-9H-xanthen-9-one (23) and ethyl 2-((9-oxo-9H-xanthen-3-yl)oxy)acetate (28) showed a mixed inhibition mechanism. Molecular docking study showed that 23 binds to the active site of AChE and interacts via extensive π–π stacking with the indole and phenol side chains of Trp86 and Tyr337, besides the hydrogen bonding with the hydration site and π–π interaction with the phenol side chain of Y72. This study revealed that 3-O-alkoxyl substituted xanthone derivatives are potential lead structures, especially 23 and 28 which can be further developed into potent AChE inhibitors. |
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