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姜辣素通过 miR-210/脑源性神经营养因子轴改善缺氧复氧诱导的神经元损伤。

Gingerol ameliorates neuronal damage induced by hypoxia-reoxygenation via the miR-210/brain-derived neurotrophic factor axis.

机构信息

Graduate School, Guangxi University of Chinese Medicine, Nanning, China.

Department of Neurology, Guangxi Key Laboratory of Chinese Medicine Foundation Research, Nanning, China.

出版信息

Kaohsiung J Med Sci. 2022 Apr;38(4):367-377. doi: 10.1002/kjm2.12486. Epub 2021 Dec 28.

Abstract

The specific mechanism of gingerol in cerebral ischemia remains unknown. A neuroprotective function for miR-210 in cerebral ischemia has been identified. The brain-derived neurotrophic factor (BDNF)-mediated signaling pathway protects against cerebral ischemic injury. This investigation aimed to determine whether gingerol plays a neuroprotective role in cerebral ischemia via the miR-210/BDNF axis. N2a cells subjected to 10 h of hypoxia and 4 h of reoxygenation were treated with 5, 10, or 20 μmol/L gingerol. The levels of viability, apoptosis, and proteins in N2a cells were determined using MTT assays, flow cytometry, and western blotting, respectively. The binding relationship between BDNF and miR-210 was studied using a dual luciferase reporter assay. The expression levels of miR-210 and BDNF were determined using qPCR. Gingerol repressed the increase in apoptosis and decrease in viability observed in response to hypoxia/reoxygenation. Gingerol increased Bcl-2, BDNF, and TrkB levels and reduced Bax and cleaved caspase 3 levels after hypoxia/reoxygenation. Gingerol evoked decreased expression of miR-210. Inhibition of miR-210 resulted in increased viability and reduced apoptosis along with increased levels of Bcl-2, BDNF, and TrkB and reduced levels of Bax and cleaved caspase 3 after hypoxia/reoxygenation. Additionally, the miR-210 mimic reversed changes induced by gingerol. The cotransfection of the miR-210 mimic and wild type BDNF led to decreased luciferase activity. BDNF was negatively regulated by miR-210. BDNF siRNA reversed these changes evoked by miR-210 inhibition. Gingerol ameliorated hypoxia/reoxygenation-stimulated neuronal damage by regulating the miR-210/BDNF axis, indicating that gingerol is worthy of further application in cerebral ischemia therapy.

摘要

姜烯酚在脑缺血中的具体作用机制尚不清楚。已经确定 miR-210 在脑缺血中具有神经保护功能。脑源性神经营养因子 (BDNF) 介导的信号通路可以防止脑缺血损伤。本研究旨在确定姜烯酚是否通过 miR-210/BDNF 轴在脑缺血中发挥神经保护作用。将 N2a 细胞缺氧 10 小时,复氧 4 小时,用 5、10 或 20μmol/L 姜烯酚处理。通过 MTT 测定法、流式细胞术和 Western blot 分别测定 N2a 细胞活力、凋亡和蛋白质水平。使用双荧光素酶报告基因检测试剂盒研究 BDNF 和 miR-210 之间的结合关系。通过 qPCR 测定 miR-210 和 BDNF 的表达水平。姜烯酚抑制缺氧/复氧引起的凋亡增加和活力降低。姜烯酚增加了 Bcl-2、BDNF 和 TrkB 水平,并降低了 Bax 和 cleaved caspase 3 水平缺氧/复氧后。姜烯酚引起 miR-210 表达下调。抑制 miR-210 可增加活力并减少凋亡,同时增加 Bcl-2、BDNF 和 TrkB 水平,并降低 Bax 和 cleaved caspase 3 水平缺氧/复氧后。此外,miR-210 模拟物逆转了姜烯酚引起的变化。miR-210 模拟物和野生型 BDNF 的共转染导致荧光素酶活性降低。BDNF 受 miR-210 负调控。BDNF siRNA 逆转了 miR-210 抑制引起的这些变化。姜烯酚通过调节 miR-210/BDNF 轴改善缺氧/复氧刺激的神经元损伤,表明姜烯酚在脑缺血治疗中具有进一步应用的潜力。

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