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Amyloid β fibril disruption by oleuropein aglycone: long-time molecular dynamics simulation to gain insight into the mechanism of action of this polyphenol from extra virgin olive oil.
Food & Function ( IF 6.1 ) Pub Date : 2020-08-03 , DOI: 10.1039/d0fo01511c
Simone Brogi 1 , Hajar Sirous 2 , Vincenzo Calderone 1 , Giulia Chemi 3
Affiliation  

In the central nervous system (CNS), extra virgin olive oil (EVOO) produces interesting effects against neurodegenerative disorders including Alzheimer's disease (AD). The valuable properties of EVOO are largely ascribed to oleuropein aglycone (OA), its most abundant phenolic constituent. In particular, it has been demonstrated that in AD, OA produces strong neuroprotective effects being able to reduce amyloid β (Aβ) aggregates, thereby diminishing the related cytotoxicity and inflammation. OA prevents Aβ aggregation, but more importantly OA was able to disrupt the preformed Aβ fibrils. Herein, we describe a comprehensive computational investigation of the mechanism of action of OA as an Aβ fibril disruptor at the molecular level. We employed extensive molecular docking calculations and long-time molecular dynamics simulation for mimicking the system of OA/Aβ fibrils. The results showed that OA is able to move in depth within the Aβ fibrils targeting a key motif in Aβ peptide, known to be relevant for stabilizing the assembled fibrils. OA causes a structural instability of preformed Aβ fibrils, determining the effective Aβ fibril disaggregation. Accordingly, this study highlighted the role of OA as a potent anti-amyloidogenic drug. On the other hand, our work has relevant implications for rationally designing potent multifunctional compounds acting as disease modifying anti-Alzheimer's drugs for the development of innovative anti-AD therapeutics.

中文翻译:

橄榄苦苷糖苷配基对淀粉样蛋白β原纤维的破坏:长期的分子动力学模拟,以了解特级初榨橄榄油中这种多酚的作用机理。

在中枢神经系统(CNS)中,特级初榨橄榄油(EVOO)对包括阿尔茨海默氏病(AD)在内的神经退行性疾病产生有趣的作用。EVOO的宝贵特性很大程度上归因于橄榄苦苷糖苷配基(OA),它是最丰富的酚类成分。特别地,已经证明,在AD中,OA产生强的神经保护作用,能够减少淀粉样β(Aβ)聚集,从而减少相关的细胞毒性和炎症。OA阻止Aβ聚集,但更重要的是OA能够破坏预先形成的Aβ原纤维。在本文中,我们描述了在分子水平上作为Aβ纤丝破坏剂的OA的作用机理的综合计算研究。我们采用了广泛的分子对接计算和长时间的分子动力学模拟来模拟OA /Aβ原纤维的系统。结果表明,OA能够在Aβ肽内靶向Aβ肽中的关键基序的深度内移动,已知这与稳定组装的原纤维有关。OA导致预先形成的Aβ原纤维结构不稳定,从而决定了有效的Aβ原纤维分解。因此,这项研究强调了OA作为一种有效的抗淀粉样变性药物的作用。另一方面,我们的工作对于合理设计有效的多功能化合物作为抗疾病的抗阿尔茨海默氏病药物以开发创新的抗AD治疗药物具有重要意义。结果表明,OA能够在Aβ肽内靶向Aβ肽中的关键基序的深度内移动,已知这与稳定组装的原纤维有关。OA会导致预先形成的Aβ原纤维结构不稳定,从而决定了有效的Aβ原纤维解聚。因此,这项研究强调了OA作为一种有效的抗淀粉样蛋白药物的作用。另一方面,我们的工作对于合理设计有效的多功能化合物作为抗疾病的抗阿尔茨海默氏病药物以开发创新的抗AD治疗药物具有重要意义。结果显示,OA能够在Aβ肽内以Aβ肽中的关键基序为目标深入移动,这与稳定组装的原纤维有关。OA导致预先形成的Aβ原纤维结构不稳定,从而决定了有效的Aβ原纤维分解。因此,这项研究强调了OA作为一种有效的抗淀粉样蛋白药物的作用。另一方面,我们的工作对于合理设计有效的多功能化合物作为抗疾病的抗阿尔茨海默氏病药物以开发创新的抗AD治疗药物具有重要意义。这项研究强调了OA作为一种有效的抗淀粉样变性药物的作用。另一方面,我们的工作对合理设计有效的多功能化合物具有重要意义,这些多功能化合物可作为疾病改良抗阿尔茨海默氏病药物,用于开发创新的抗AD治疗药物。这项研究强调了OA作为一种有效的抗淀粉样变性药物的作用。另一方面,我们的工作对于合理设计有效的多功能化合物作为抗疾病的抗阿尔茨海默氏病药物以开发创新的抗AD治疗药物具有重要意义。
更新日期:2020-09-23
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