实用医学杂志 ›› 2023, Vol. 39 ›› Issue (7): 819-826.doi: 10.3969/j.issn.1006⁃5725.2023.07.005

• 基础研究 • 上一篇    下一篇

基于2⁃Cl⁃MGV⁃1/BDNF⁃TrkB 通路探讨脑梗死后认知功能改善的研究 

方雪1 邵卫1 许慧芳1 李道新2 王婧1    

  1. 华中科技大学附属武汉中西结合医院1 神经内科,2 肾内科(武汉 430000)

  • 出版日期:2023-04-10 发布日期:2023-04-10
  • 基金资助:
    湖北省卫生健康科研基金项目(编号:20210853)

A study on improvement in cognitive function after cerebral infarction based on 2⁃Cl⁃MGV⁃1/BDNF⁃TrkB pathway

FANG Xue*,SHAO Wei,XU Huifang,LI Daoxin,WANG Jing.   

  1. Department of Neurology,Wuhan Integrated Chinese and Western Hospital Affiliated to Huazhong University of Science and Technology,Wuhan 430000,China

  • Online:2023-04-10 Published:2023-04-10

摘要:

目的 基于 2⁃(2⁃氯苯基)喹唑啉⁃4⁃基二甲基氨基甲酸酯(2⁃Cl⁃MGV⁃1)/脑源性神经营养因 子(BDNF)⁃原肌球蛋白受体激酶 B(TrkB)通路探讨脑梗死后认知功能改善的研究。方法 成年雄性 Sprague⁃Dawley大鼠随机分为3组,每组20只,分别为对照组、大脑中动脉栓塞(MCAO)组和2⁃Cl⁃MGV⁃1组。 除对照组外,其他组建立 MCAO 模型,2⁃Cl⁃MGV⁃1 组在模型建立后采用 2⁃Cl⁃MGV⁃1 治疗,连续给药 7 d 评估各组大鼠脑梗死面积、空间学习记忆障碍、线粒体损伤和 BDNF/TrkB 信号通路。体外将 PC12 神经元 细胞系分为以下 3 组:对照(Con)组、氧气和葡萄糖剥夺/再灌注模型(OGD/R)组和 2⁃Cl⁃MGV⁃1 组。除 Con 组,其他组建立 OGD/R 模型,2⁃Cl⁃MGV⁃1 组加入 25 μmol/L 2⁃Cl⁃MGV⁃1 处理细胞 24 h。通过 CCK⁃8 评估细 胞活力。结果 MCAO 组相比,2⁃Cl⁃MGV⁃1 组梗死面积显著减少(P < 0.05),和尼氏体的数量显著增加 P < 0.05)。与对照组相比,MCAO组大鼠的逃避潜伏期显著增加(P < 0.001),而2⁃Cl⁃MGV⁃1组的逃避潜伏 期显著低于MCAO 组(P < 0.01)。在第7天,MCAO 组大鼠穿过平台的次数显著低于对照组(P < 0.001),而 2⁃Cl⁃MGV⁃1组大鼠穿过平台的次数较MCAO组显著增加(P < 0.05)。与对照组相比,MCAO组皮质中的线粒 体膜电位和ATP产量显著降低(P < 0.01),而2⁃Cl⁃MGV⁃1组线粒体膜电位和ATP产量较MCAO组显著增加 P < 0.05)。与对照组相比,MCAO 组大鼠皮层神经元中的 BDNF、TrkB 蛋白水平显著增加(P < 0.05),并 2⁃Cl⁃MGV⁃1 BDNF、TrkB 蛋白水平显著高于 MCAO 组(P < 0.05)。与 Con 组相比,OGD/R 组细胞活力 ATP 产量显著降低(P < 0.05),而 2⁃Cl⁃MGV⁃1 组细胞活力和 ATP 产量较 OGD/R 组显著增加(P < 0.05)。 Con 组相比,OGD/R PC12 细胞中 BDNF、TrkB 蛋白水平显著增加(P < 0.05),并且 2⁃Cl ⁃M

GV ⁃1 BDNF、TrkB 蛋白水平显著高于 MCAO 组(P < 0.05)。结论 2⁃Cl⁃MGV⁃1 MCAO 诱导的大鼠脑缺血/再灌 注损伤具有线粒体保护作用,并改善大鼠的认知功能。2⁃Cl⁃MGV⁃1 可能通过调节 BDNF/TrkB 信号通路发 挥神经保护作用。

关键词:

2?Cl?MGV?1, 脑源性神经营养因子, 原肌球蛋白受体激酶B, 线粒体, 认知功能

Abstract:

Objective To explore the improvement in cognitive function after cerebral infarction based on the 2 ⁃(2 ⁃ chlorophenyl)quinazolin ⁃ 4 ⁃ yl dimethylcarbamate(2 ⁃ Cl ⁃ MGV ⁃ 1)/brain ⁃ derived neurotrophic factor (BDNF)⁃ tropomyosin receptor kinase B(TrkB)pathway. Methods Adult Sprague⁃Dawley rats were randomly divided into a control group,middle cerebral artery embolism(MCAO)group,and 2⁃Cl ⁃MGV ⁃1 group,20 in each group. Except the control group,other groups established MCAO models. 2⁃Cl⁃MGV⁃1 group was treated with 2⁃Cl⁃MGV⁃1 for 7 days after the model was established. The cerebral infarction area,spatial learning and memory impairment,mitochondrial damage and BDNF/TrkB signal pathway were assessed in each group. In vitro PC12 neuron cell lines were divided into the following three groups:control group(Con),oxygen and glucose deprivation/ reperfusion model(OGD/R)group,and 2⁃Cl⁃MGV⁃1 group. Except Con group,other groups established OGD/R models,and 2⁃Cl⁃MGV⁃1 group was treated with 25 μmol/L 2⁃Cl⁃MGV⁃1 for 24 hours. Cell viability was evaluated by CCK⁃8. Results As compared with MCAO group,the infarct area in 2⁃Cl⁃MGV⁃1 group decreased significantly (P < 0.05),and the number of Nissl bodies increased significantly(P < 0.05). As compared with the control group,the escape latency was significantly increased in MCAO group(P < 0.001),while it was significantly shorter in 2⁃Cl ⁃MGV ⁃1 group than in MCAO group(P < 0.01). On day 7,the number of crossing the platform in MCAO group was significantly lower than that in the control group(P < 0.001),while the number of crossing the platform in 2⁃Cl⁃MGV⁃1 group was significantly higher than that in MCAO group(P < 0.05). As compared with the control group,cortical mitochondrial membrane potential and ATP production decreased significantly in MCAO group (P < 0.01),while increased markedly in 2⁃Cl⁃MGV⁃1 group(P < 0.05). As compared with the control group,lev⁃ els of BDNF and TrkB protein in cerebral cortex neurons in MCAO group were significantly increased(P < 0.05), and levels of BDNF and TrkB protein in 2⁃Cl⁃MGV⁃1 group were significantly higher than those in MCAO group (P < 0.05). As compared with Con group,cell viability and ATP production decreased significantly in OGD/R group(P < 0.05),while increased significantly in 2⁃Cl⁃MGV⁃1 group(P < 0.05). As compared with Con group levels of BDNF and TrkB protein in OGD/R group increased significantly(P < 0.05),and levels of BDNF and TrkB protein in 2⁃Cl⁃MGV⁃1 group were significantly higher than those in MCAO group(P < 0.05). Conclusions 2⁃Cl⁃MGV⁃1 can protect mitochondria from MCAO⁃induced cerebral ischemia/reperfusion injury and improve cogni⁃ tive function in rats. It may play a neuroprotective role by regulating BDNF/TrkB signaling pathway.

Key words:

2?Cl?MGV?1, brain?derived neurotrophic factor, tropomyosin receptor kinase B, mito? chondria, cognitive function