Pterostilbene Attenuates Subarachnoid Hemorrhage-Induced Brain Injury through the SIRT1-Dependent Nrf2 Signaling Pathway.

Pterostilbene Attenuates Subarachnoid Hemorrhage-Induced Brain Injury through the SIRT1-Dependent Nrf2 Signaling Pathway.
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紫檀芪通过 SIRT1 依赖性 Nrf2 信号通路减轻蛛网膜下腔出血引起的脑损伤。

DOI:
10.1155/2022/3550204
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发表时间:
2022
影响因子:
--
通讯作者:
Lu, Yue
Lu, Yue
中科院分区:
生物学2区
文献类型:
--
作者:
Zhang, Zihuan;Fang, Jincheng;Zhou, Jiawang;Ding, Fei;Zhou, Gang;Zhao, Xintong;Zhuang, Zong;Lu, Yue

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神经炎性损伤、氧化损伤和神经元凋亡是蛛网膜下腔出血(SAH)后不良结局的主要原因。紫檀芪(PTE)是白藜芦醇的类似物,已被证实是一种有效的sirtuin 1(SIRT 1)激活剂。然而,PTE对SAH诱导的脑损伤的有益作用以及PTE是否在SAH后调节SIRT 1信号仍然未知。我们首先评估了PTE对SAH后早期脑损伤的剂量反应影响。此外,给予EX 527以抑制SIRT 1信号传导。结果表明,PTE显着减弱小胶质细胞活化,氧化损伤,神经元损伤,和早期神经功能恶化。机制上,PTE有效地增强SIRT 1表达,并促进核因子-红细胞2相关因子2(Nrf 2)在细胞核中的积累。此外,EX 527预处理明显抑制PTE诱导的SIRT 1和Nrf 2活化,并使这些有益结果恶化。总之,我们的研究提供了PTE通过激活SIRT 1依赖的Nrf 2信号通路保护SAH损伤的证据。PTE可能是SAH的一种治疗替代方案。
Neuroinflammatory injury, oxidative insults, and neuronal apoptosis are major causes of poor outcomes after subarachnoid hemorrhage (SAH). Pterostilbene (PTE), an analog of resveratrol, has been verified as a potent sirtuin 1 (SIRT1) activator. However, the beneficial actions of PTE on SAH-induced brain injury and whether PTE regulates SIRT1 signaling after SAH remain unknown. We first evaluated the dose-response influence of PTE on early brain impairment after SAH. In addition, EX527 was administered to suppress SIRT1 signaling. The results revealed that PTE significantly attenuated microglia activation, oxidative insults, neuronal damage, and early neurological deterioration. Mechanistically, PTE effectively enhanced SIRT1 expression and promoted nuclear factor-erythroid 2-related factor 2 (Nrf2) accumulation in nuclei. Furthermore, EX527 pretreatment distinctly repressed PTE-induced SIRT1 and Nrf2 activation and deteriorated these beneficial outcomes. In all, our study provides the evidence that PTE protects against SAH insults by activating SIRT1-dependent Nrf2 signaling pathway. PTE might be a therapeutic alternative for SAH.
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