通过虚拟筛选、体外筛选和分子动力学模拟发现新型乙酰胆碱酯酶抑制剂。

Discovery of Novel Acetylcholinesterase Inhibitors by Virtual Screening, In Vitro Screening, and Molecular Dynamics Simulations.

机构信息

Department of Chemistry, Faculty of Natural and Agricultural Sciences, University of Pretoria, Lynnwood Road, Pretoria 0028, South Africa.

Pharmaceutical Technologies, CSIR Future Production: Chemicals, Meiring Naudé Road, Pretoria 0184, South Africa.

出版信息

J Chem Inf Model. 2022 Mar 28;62(6):1550-1572. doi: 10.1021/acs.jcim.1c01443. Epub 2022 Feb 10.

Abstract

Alzheimer's disease is the most common neurodegenerative disease and currently poses a significant socioeconomic problem. This study describes the uses of computer-aided drug discovery techniques to identify novel inhibitors of acetylcholinesterase, a target for Alzheimer's disease. High-throughput virtual screening was employed to predict potential inhibitors of acetylcholinesterase. Validation of enrichment was performed with the DUD-E data set, showing that an ensemble of binding pocket conformations is critical when a diverse set of ligands are being screened. A total of 720 compounds were submitted for in vitro screening, which led to 25 hits being identified with IC values of less than 50 μM. The majority of these hits belonged to two scaffolds: 1-ethyl-3-methoxy-3-methylpyrrolidine and 1-pyrrolo[3,2-]pyridin-6-amine both of which are noted to be promising compounds for further optimization. As various possible binding poses were suggested from molecular docking, molecular dynamics simulations were employed to validate the poses. In the case of the most active compounds identified, a critical, stable water bridge formed deep within the binding pocket was identified potentially explaining in part the lack of activity for subsets of compounds that are not able to form this water bridge.

摘要

阿尔茨海默病是最常见的神经退行性疾病,目前给社会经济带来了巨大的问题。本研究描述了利用计算机辅助药物发现技术来识别乙酰胆碱酯酶的新型抑制剂,乙酰胆碱酯酶是阿尔茨海默病的一个靶点。采用高通量虚拟筛选来预测潜在的乙酰胆碱酯酶抑制剂。使用 DUD-E 数据集进行了富集验证,结果表明,当筛选一组多样化的配体时,结合口袋构象的集合是至关重要的。总共提交了 720 种化合物进行体外筛选,结果确定了 25 种 IC 值低于 50 μM 的化合物。这些命中化合物的大多数属于两种支架:1-乙基-3-甲氧基-3-甲基吡咯烷和 1-吡咯并[3,2-]吡啶-6-胺,这两种都被认为是进一步优化的有前途的化合物。由于从分子对接中提出了各种可能的结合构象,因此采用分子动力学模拟来验证这些构象。在确定的最活跃的化合物中,鉴定出一个在结合口袋深处形成的关键、稳定的水分子桥,这可能部分解释了为什么某些不能形成这种水分子桥的化合物亚组没有活性。

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