7,8-Dihydroxycoumarin Alleviates Synaptic Loss by Activated PI3K-Akt-CREB-BDNF Signaling in Alzheimer's Disease Model Mice.

7,8-Dihydroxycoumarin Alleviates Synaptic Loss by Activated PI3K-Akt-CREB-BDNF Signaling in Alzheimer's Disease Model Mice.
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7,8-二羟基香豆素通过激活 PI3K-Akt-CREB-BDNF 信号传导减轻阿尔茨海默病模型小鼠的突触损失

DOI:
10.1021/acs.jafc.2c02140
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发表时间:
2022-06-15
影响因子:
6.1
通讯作者:
Chen J
Chen J
中科院分区:
农林科学1区
文献类型:
--
作者:
Yan L;Jin Y;Pan J;He X;Zhong S;Zhang R;Choi L;Su W;Chen J

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阿尔茨海默病(Alzheimer's disease,AD)是一种进行性神经退行性疾病,临床上以记忆和认知功能障碍为特征。β-淀粉样蛋白(Aβ)在脑中的积累被认为是AD发展的关键过程,因为它损害突触的功能,从而损害记忆形成。最近的研究表明,一组可食用植物来源的百里香科化合物(称为香豆素)可能对缓解学习和记忆障碍发挥特别强大的作用。7,8-二羟香豆素(7,8-DHC)是百里香科植物香豆素的一种生物活性成分,具有神经保护作用。在这项研究中,我们发现7,8-DHC能够通过降低BACE 1水平和增加ADAM 17和ADAM 10水平来减轻Aβ蓄积。更重要的是,我们发现7,8-DHC可以通过激活PI 3 K-Akt-CREB-BDNF信号通路减轻记忆障碍,促进树突分支密度,增加突触蛋白表达。因此,这些结果表明,7,8-DHC代表了一种新的生物活性治疗剂,在治疗AD的过程中减轻Aβ沉积和突触丢失。
Alzheimer’s disease (AD) is a progressive neurodegenerative disorder and is clinically characterized by the impairment of memory and cognition. Accumulation of β-amyloid (Aβ) in the brain is considered as a key process in the development of AD because it impairs the synapses’ function to impair memory formation. Recent research studies have indicated that a group of edible plant-derived Thymelaeaceae compounds known as coumarin may exert particularly powerful actions on alleviating learning and memory impairment. 7,8-Dithydroxycoumarin (7,8-DHC), a bioactive component of coumarin derived from Thymelaeaceae, showed its function in neuroprotection before. In this study, we found that 7,8-DHC was able to mitigate Aβ accumulation via reducing the level of BACE1 and increasing the level of ADAM17 and ADAM10. More importantly, we found that 7,8-DHC could mitigate memory impairment, promote the dendrite branch density, and increase synaptic protein expression via activating PI3K-Akt-CREB-BDNF signaling. Hence, these results suggested that 7,8-DHC represented a novel bioactive therapeutic agent in mitigating Aβ deposition and synaptic loss in the process of treating AD.
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