期刊
JOURNAL OF BIOMOLECULAR STRUCTURE & DYNAMICS
卷 40, 期 5, 页码 1942-1951出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/07391102.2020.1834455
关键词
Acetylcholinesterase inhibition; LC-MS; molecular docking; molecular networking; natural products; glycosylated flavonoids
资金
- Shahid Beheshti University Research Council
- UOW Mass Spectrometry User Resource and Research Facility (MSURRF)
- Molecular Horizons at the University of Wollongong, Australia
In this study, a molecular networking approach was used to analyze the chemical profile of a medicinal plant extract with AChE activity. A total of 44 compounds were identified, with glycosylated flavonoid querciturone showing the highest affinity and several compounds showing stronger activity against AChE than the clinically used drug donepezil.
Alzheimer's disease (AD) is a devastating neurodegenerative disease affecting 47 million people worldwide. While acetylcholinesterase (AChE) inhibitors such as donepezil and galantamine are leading drugs in the symptomatic treatment of AD, new AChE inhibitors continue to be explored for improved potency and selectivity. Herein, a molecular networking approach using high resolution (HR-MS) and tandem mass spectrometry (MS2) has been used for rapid chemical profiling of an extract of the medicinal plantVincetoxicum funebreBoiss. & Kotschy (Apocynaceae family) that was active against AChE. A total of 44 compounds were identified by combining the MN with traditional natural product methods, including the isolation and identification of five known compounds (13, 41-44) and a novel C-13-norisoprenoid (40). In addition, the potential inhibitory activity of all 44 compounds was evaluated against the AChE enzyme via molecular docking to provide further support to the proposed structures. The glycosylated flavonoid querciturone (31) exhibited the highest affinity with a docking score value of -13.43 kJ/mol. Another five compounds showed stronger docking scores against AChE than the clinically used donepezil including the most active isolated compound daucosterol (44), with a binding affinity of -10.11 kJ/mol towards AChE. These findings broaden our understanding of Vincetoxicum metabolites and highlight the potential of glycosylated flavonoids as AChE inhibitors. Communicated by Ramaswamy H. Sarma
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