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石杉碱甲调节淀粉样前体蛋白蛋白水解和 Tau 蛋白构象的生理稳态——一项计算与实验研究

Huperzine A Regulates the Physiological Homeostasis of Amyloid Precursor Protein Proteolysis and Tau Protein Conformation-A Computational and Experimental Investigation.

作者信息

Wongjaikam Suwakon, Nopparat Chutikorn, Boontem Parichart, Panmanee Jiraporn, Thasana Nopporn, Shukla Mayuri, Govitrapong Piyarat

机构信息

Chulabhorn Graduate Institute, Chulabhorn Royal Academy, Bangkok 10210, Thailand.

Cell and Animal Model Unit, Institute of Nutrition, Mahidol University, Nakhonpathom 73170, Thailand.

出版信息

Biology (Basel). 2024 Jul 12;13(7):518. doi: 10.3390/biology13070518.

Abstract

The beneficial actions of the natural compound Huperzine A (Hup A) against age-associated learning and memory deficits promote this compound as a nootropic agent. Alzheimer's disease (AD) pathophysiology is characterized by the accumulation of amyloid beta (Aβ). Toxic Aβ oligomers account for the cognitive dysfunctions much before the pathological lesions are manifested in the brain. In the present study, we investigated the effects of Hup A on amyloid precursor protein (APP) proteolysis in SH-SY5Y neuroblastoma cells. Hup A downregulated the expression of β-site amyloid precursor protein cleaving enzyme 1 (BACE1) and presenilin 1 (PS1) levels but augmented the levels of A disintegrin and metalloproteinase 10 (ADAM10) with significant decrement in the Aβ levels. We herein report for the first time an in silico molecular docking analysis that revealed that Hup A binds to the functionally active site of BACE1. We further analyzed the effect of Hup A on glycogen synthase kinase-3 β (GSK3β) and phosphorylation status of tau. In this scenario, based on the current observations, we propose that Hup A is a potent regulator of APP processing and capable of modulating tau homeostasis under physiological conditions holding immense potential in preventing and treating AD like disorders.

摘要

天然化合物石杉碱甲(Hup A)对与年龄相关的学习和记忆缺陷具有有益作用,这促使该化合物成为一种益智药。阿尔茨海默病(AD)的病理生理学特征是β淀粉样蛋白(Aβ)的积累。有毒的Aβ寡聚体在大脑中出现病理病变之前很久就导致了认知功能障碍。在本研究中,我们研究了石杉碱甲对SH-SY5Y神经母细胞瘤细胞中淀粉样前体蛋白(APP)蛋白水解的影响。石杉碱甲下调了β位点淀粉样前体蛋白裂解酶1(BACE1)和早老素1(PS1)的表达水平,但增加了去整合素和金属蛋白酶10(ADAM10)的水平,同时Aβ水平显著降低。我们在此首次报告了一项计算机分子对接分析,该分析表明石杉碱甲与BACE1的功能活性位点结合。我们进一步分析了石杉碱甲对糖原合酶激酶-3β(GSK3β)和tau蛋白磷酸化状态的影响。在这种情况下,基于当前的观察结果,我们提出石杉碱甲是APP加工的有效调节剂,并且在生理条件下能够调节tau蛋白稳态,在预防和治疗类似AD的疾病方面具有巨大潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a084/11273828/f4f64123ea36/biology-13-00518-g001.jpg

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