丙酮酸乙酯通过Notch1和NF-κB信号修复大脑 中动脉闭塞诱导的神经损伤
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Ethyl pyruvate repairs nerve injury induced by middle cerebral artery occlusion through regulating Notch1 and NF-κB signals
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    摘要:

    目的 探讨丙酮酸乙酯(EP)对大脑中动脉闭塞(MCAO)诱导的神经功能损伤的作用及 其潜在的分子机制。方法 将40 只SD 雄性大鼠随机均分为4 组:假手术组(Sham),大脑中动脉闭塞组 (MCAO),大脑中动脉闭塞+5 mg/kg 丙酮酸乙酯组(MCAO+5EP),大脑中动脉闭塞+10 mg/kg 丙酮酸乙酯 组(MCAO+10EP)。神经损伤严重程度评分(mNSS)及旋转试验检测大鼠神经损伤及恢复,实时定量PCR 检测脑源性神经营养因子(BDNF)和神经生长因子(NGF)、Notch1和核因子κB( NF-κB)信号的表达。 结果 与MCAO 组相比,2 个剂量的EP均可降低mNSS 评分(均P< 0.05),提高大鼠在15 r/min 旋转轴上 的持续时间(均P < 0.05),上调BDNF 和NGF mRNA 的表达(均P < 0.05),下调Notch1 和NF-κB mRNA 的表达(均P< 0.05),且10 mg/kg 的EP 作用效果更好。结论 10 mg/kg 的EP具有较好的神经保护作用, 其机制可能与抑制Notch1 和NF-κB 信号有关。

    Abstract:

    Objective This study was to investigate the role and potential molecular mechanism of ethyl pyruvate( EP) on the damage of nervous function induced by middle cerebral artery occlusion( MCAO). Methods A total of 40 male sprague-dawley rats were randomly and averagely divided into 4 groups: sham operation group( Sham), middle cerebral artery occlusion group( MCAO), middle cerebral artery occlusion + 5 mg/kg EP group( MCAO+5EP), middle cerebral artery occlusion + 10 mg/kg EP group( MCAO+10EP). Nerve injury and repairment in rats were measured by nerve injury severity score( mNSS) and rotation test. Expressions of brain derivied neurotrophic factor( BDNF) and neuron grouthfactor (NGF), Notch1 and Nuclear factor-kappa B( NF-κB) signals were tested by Real-time quantitative PCR. Results Compared with MCAO group, EP with two dosages all significantly reduced mNSS score( all P<0.05), increased the duration of rats in 15 rpm rotating shaft( all P < 0.05), up-regulated the expressions of BDNF and NGF mRNA( all P < 0.05), down-regulated the expressions of Notch1 and NF-κB mRNA( all P< 0.05). The effectiveness with 10 mg/kg EP was better. Conclusions 10 mg/kg EP has better neuroprotective effects on nerve protection, and its mechanism may be related to inhibition of Notch1 and NF-κB signals.

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杨德民 杨文佳 唐鹏.丙酮酸乙酯通过Notch1和NF-κB信号修复大脑 中动脉闭塞诱导的神经损伤[J].神经疾病与精神卫生,2018,18(12):
DOI :10.3969/j. issn.1009-6574.2018.12.006.

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  • 在线发布日期: 2019-03-20