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Dl-3-n-butylphthalide attenuates hypoxic-ischemic brain injury through inhibiting endoplasmic reticulum stress-induced cell apoptosis and alleviating blood-brain barrier disruption in newborn rats.
Brain Research ( IF 2.9 ) Pub Date : 2020-08-05 , DOI: 10.1016/j.brainres.2020.147046
Mingchu Fang 1 , Junhui Yuan 2 , Shishuang Jiang 3 , Yingying Hu 1 , Shulin Pan 1 , Jianghu Zhu 1 , Xiaoqin Fu 1 , Huai Jiang 1 , Jian Lin 4 , Peijun Li 1 , Zhenlang Lin 5
Affiliation  

Dl-3-n-butylphthalide (NBP) has been demonstrated to exert neuroprotective effects in experimental models and human patients. This study was performed to assess the therapeutic effects and the underlying molecular mechanisms of NBP in a neonatal hypoxic-ischemic rat model. The results showed that NBP treatment significantly reduced the infarct volume, improved histological recovery, decreased neuronal cell loss, enhanced neuronal cell rehabilitation, promoted neurite growth and decreased white matter injury. In addition, NBP treatment effectively improved long-term neurobehavioral development and prognosis after HI injury. We further demonstrated an inhibitory effect of NBP on endoplasmic reticulum (ER) stress-induced apoptosis, evidenced by reduction in ER stress-related protein expressions (GRP78, XBP-1, PDI and CHOP), decrease in TUNEL-positive cells, down-regulation in pro-apoptosis protein (Bax and cleaved caspase-3), up-regulation in anti-apoptosis protein (Bcl-2). Moreover, NBP exerted a protective effect in blood-brain barrier disruption, which ameliorated brain edema and reduced the degeneration of the tight junction proteins (Occludin and Claudin-5) and adherens junction proteins (P120-Catenin, VE-Cadherin and β-Catenin). Overall, our findings demonstrated that NBP treatment attenuated HI brain injury through inhibiting ER stress-induced apoptosis and alleviating blood-brain barrier disruption in newborn rats. This work provides an effective therapeutic strategy to reduce brain damage and enhance recovery after neonatal HI brain injury.



中文翻译:

Dl-3-n-丁基苯酞通过抑制内质网应激诱导的细胞凋亡和减轻新生大鼠的血脑屏障破坏来减轻缺氧缺血性脑损伤。

Dl-3-n-丁基苯酞 (NBP) 已被证明在实验模型和人类患者中发挥神经保护作用。本研究旨在评估 NBP 在新生儿缺氧缺血大鼠模型中的治疗效果和潜在分子机制。结果表明,NBP治疗显着减少了梗死体积,改善了组织学恢复,减少了神经元细胞丢失,增强了神经元细胞康复,促进了神经突生长并减少了白质损伤。此外,NBP治疗有效改善了HI损伤后的长期神经行为发育和预后。我们进一步证明了 NBP 对内质网 (ER) 应激诱导的细胞凋亡的抑制作用,通过减少 ER 应激相关蛋白表达(GRP78、XBP-1、PDI 和 CHOP)来证明,TUNEL 阳性细胞减少,促凋亡蛋白(Bax 和裂解的 caspase-3)下调,抗凋亡蛋白(Bcl-2)上调。此外,NBP在血脑屏障破坏中发挥保护作用,改善脑水肿并减少紧密连接蛋白(Occludin和Claudin-5)和粘附连接蛋白(P120-Catenin、VE-Cadherin和β-Catenin)的变性)。总的来说,我们的研究结果表明,NBP 治疗通过抑制 ER 应激诱导的细胞凋亡和减轻新生大鼠的血脑屏障破坏来减轻 HI 脑损伤。这项工作提供了一种有效的治疗策略,以减少新生儿 HI 脑损伤后的脑损伤和促进恢复。抗凋亡蛋白 (Bcl-2) 的上调。此外,NBP在血脑屏障破坏中发挥保护作用,改善脑水肿并减少紧密连接蛋白(Occludin和Claudin-5)和粘附连接蛋白(P120-Catenin、VE-Cadherin和β-Catenin)的变性)。总的来说,我们的研究结果表明,NBP 治疗通过抑制 ER 应激诱导的细胞凋亡和减轻新生大鼠的血脑屏障破坏来减轻 HI 脑损伤。这项工作提供了一种有效的治疗策略,以减少新生儿 HI 脑损伤后的脑损伤和促进恢复。抗凋亡蛋白 (Bcl-2) 的上调。此外,NBP在血脑屏障破坏中发挥保护作用,改善脑水肿并减少紧密连接蛋白(Occludin和Claudin-5)和粘附连接蛋白(P120-Catenin、VE-Cadherin和β-Catenin)的变性)。总的来说,我们的研究结果表明,NBP 治疗通过抑制 ER 应激诱导的细胞凋亡和减轻新生大鼠的血脑屏障破坏来减轻 HI 脑损伤。这项工作提供了一种有效的治疗策略,以减少新生儿 HI 脑损伤后的脑损伤和促进恢复。改善脑水肿并减少紧密连接蛋白(Occludin 和 Claudin-5)和粘附连接蛋白(P120-Catenin、VE-Cadherin 和 β-Catenin)的退化。总的来说,我们的研究结果表明,NBP 治疗通过抑制 ER 应激诱导的细胞凋亡和减轻新生大鼠的血脑屏障破坏来减轻 HI 脑损伤。这项工作提供了一种有效的治疗策略,以减少新生儿 HI 脑损伤后的脑损伤和促进恢复。改善脑水肿并减少紧密连接蛋白(Occludin 和 Claudin-5)和粘附连接蛋白(P120-Catenin、VE-Cadherin 和 β-Catenin)的退化。总的来说,我们的研究结果表明,NBP 治疗通过抑制 ER 应激诱导的细胞凋亡和减轻新生大鼠的血脑屏障破坏来减轻 HI 脑损伤。这项工作提供了一种有效的治疗策略,以减少新生儿 HI 脑损伤后的脑损伤和促进恢复。

更新日期:2020-08-08
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