中国组织工程研究 ›› 2022, Vol. 26 ›› Issue (5): 736-741.doi: 10.12307/2022.120

• 组织构建细胞学实验 cytology experiments in tissue construction • 上一篇    下一篇

葛根总黄酮干预长时耐力运动后再力竭运动大鼠脑组织β-连环蛋白及糖原合成酶激酶3β的表达

莫伟彬1,2,黄天昌1,曾智伟1,燕林博1   

  1. 1广西师范大学体育与健康学院,广西壮族自治区桂林市   541004;2药用资源化学与药物分子工程国家重点实验室,广西壮族自治区桂林市  541004
  • 收稿日期:2020-11-09 修回日期:2020-11-13 接受日期:2020-12-14 出版日期:2022-02-18 发布日期:2021-11-03
  • 通讯作者: 曾智伟,副教授,广西师范大学体育与健康学院,广西壮族自治区桂林市 541004
  • 作者简介:莫伟彬,男,1979年生,广西壮族自治区贵港市人,汉族,2010年广西师范大学毕业,硕士,高级实验师,主要从事运动生理学与训练研究。
  • 基金资助:
    广西教育厅科研项目(2021KY1596),项目参与人:莫伟彬;广西教育厅科研项目(2018KY0090),项目负责人:莫伟彬;教育发展基金会“教师成长基金”项目(EDF2016005),项目负责人:莫伟彬;国家重点实验室开放项目(CMEMR2012-B04),项目负责人:莫伟彬

Effects of Pueraria lobata flavonoids on expressions of beta-catenin and glycogen synthase kinase 3beta in the brain of rats undergoing exhaustive exercise after long endurance exercise

Mo Weibin1, 2, Huang Tianchang1, Zeng Zhiwei1, Yan Linbo1    

  1. 1College of Physical Education and Health, Guangxi Normal University, Guilin 541004, Guangxi Zhuang Autonomous Region, China; 2State Key Laboratory of Medicinal Resources Chemistry and Molecular Engineering, Guilin 541004, Guangxi Zhuang Autonomous Region, China
  • Received:2020-11-09 Revised:2020-11-13 Accepted:2020-12-14 Online:2022-02-18 Published:2021-11-03
  • Contact: Zeng Zhiwei, Associate professor, College of Physical Education and Health, Guangxi Normal University, Guilin 541004, Guangxi Zhuang Autonomous Region, China
  • About author:Mo Weibin, Master, Senior experimentalist, College of Physical Education and Health, Guangxi Normal University, Guilin 541004, Guangxi Zhuang Autonomous Region, China; State Key Laboratory of Medicinal Resources Chemistry and Molecular Engineering, Guilin 541004, Guangxi Zhuang Autonomous Region, China
  • Supported by:
    Scientific Research Projects of Guangxi Provincial Education Department, No. 2021KY1596 (to MWB [project participant]) and 2018KY0090 (to MWB); Education Development Foundation for Teacher Growth Project, No. EDF2016005 (to MWB); State Key Laboratory Open Project, No. CMEMR2012-B04 (to MWB) 

摘要:

文题释义:
β-连环蛋白:是果蝇Armadillo(arm)蛋白的同源物,分为α、β、γ 3个亚型,含有781个氨基酸,分子质量72-95 kD,它是定位于人染色体3p22-p21.3上的一种多功能蛋白质,是Wnt信号通路中最关键的通道传递分子,具有调控细胞因子、转录激活蛋白、修复大脑神经血管与再生等作用。
大脑缺氧:缺氧是指氧气缺乏症,即空气中缺氧或氧气缺乏状态的总称。大脑缺氧就是脑细胞缺乏内源氧。长时间大脑缺氧会造成不可逆转的损害,甚至脑死亡。一般性的“体内缺氧”,即使不会直接发生生命危险,也会对身体健康造成损伤。


背景:长时间的力竭运动易引起大鼠缺血缺氧,致使脑组织损伤,葛根总黄酮具有保护大鼠心脑血管、改善脑损伤神经和抗氧化等作用,但运动前补充葛根总黄酮是否达到保护脑组织作用目前尚不明确。
目的:观察葛根总黄酮对运动大鼠脑组织病理改变和β-连环蛋白及糖原合成酶激酶3β表达的影响。
方法:将50只SD雄性大鼠随机分为安静对照组、运动对照组、葛根总黄酮低、中、高剂量组。除安静对照组外,其余各组大鼠进行为期6周的运动训练,于6周末即最后一次训练达到力竭。葛根总黄酮低、中、高剂量组大鼠均在运动前20 min灌胃50,100,200 mg/kg的葛根总黄酮,1次/d,直到实验结束。苏木精-伊红染色观察脑组织病理学变化,免疫组织化学法、RT-PCR法及Western blot法测定β-连环蛋白和糖原合成酶激酶3β表达。
结果与结论:①光镜观察运动对照组大鼠脑皮质和海马区有部分神经细胞胞体肿胀、胞体收缩、脑膜或室管膜显现水肿、充血和出血等现象,葛根总黄酮低剂量组有水肿、充血和出血等轻微症状,而中、高剂量组大鼠脑组织病理变化与安静对照组比较无明显差异;②免疫组织化学染色显示,运动对照组大鼠脑组织β-连环蛋白和糖原合成酶激酶3β表达均高于安静对照组(P < 0.01),葛根总黄酮中、高剂量组大鼠脑组织β-连环蛋白和糖原合成酶激酶3β表达均低于运动对照组(P < 0.01);③运动对照组大鼠脑组织β-连环蛋白、糖原合成酶激酶3β mRNA及蛋白表达均高于安静对照组(P < 0.05或P < 0.01);葛根总黄酮中、高剂量组大鼠脑组织β-连环蛋白、糖原合成酶激酶3β mRNA及蛋白表达均低于运动对照组(P < 0.05或P < 0.01);④结果表明,力竭运动引起大鼠脑组织损伤和β-连环蛋白、糖原合成酶激酶3β表达上调,葛根总黄酮可能是通过下调β-连环蛋白和糖原合成酶激酶3β的表达进而有效改善大鼠脑组织损伤,从而达到保护脑组织的作用。

https://orcid.org/0000-0001-5303-2960 (莫伟彬) 

关键词: 葛根总黄酮, 力竭运动, 脑组织, β-连环蛋白, 糖原合成酶激酶3β, 通路, 大鼠

Abstract: BACKGROUND: Prolonged exhaustive exercise can easily cause ischemia and hypoxia in rats, leading to brain tissue damage. Pueraria lobata flavonoids can exert a series of roles, including cardiovascular and cerebrovascular protections, improvement of brain damage and anti-oxidation. However, whether supplementation of Pueraria lobata flavonoids prior to exercise can protect the brain tissue is still unclear.
OBJECTIVE: To observe the effect of total flavonoids in Pueraria lobata on histopathological changes and expressions of β-catenin and glycogen synthase kinase 3β in rats undergoing exercises.
METHODS: Fifty Sprague-Dawley male rats were randomly divided into five groups: a quiet control group, an exercise control group, and low-, medium-and high-dose groups of total flavonoids in Pueraria lobata. Except the quiet control group, the remaining groups were trained for 6 weeks, while the last training reached exhaustion on the 6th weekend. In the low-, middle- and high-dose groups, all the rats were given 50, 100, 200 mg/kg total flavonoids in Pueraria lobata by gavage at 20 minutes before the experiment once a day until the end of the experiment. In all the groups, hematoxylin-eosin staining was used to observe the histopathological changes of the brain, and immunohistochemistry, PCR and western blot were used to determine the expressions of β-catenin and glycogen synthase kinase 3β. 
RESULTS AND CONCLUSION: Under the light microscope, in the exercise control group, some nerve cells in the cerebral cortex and hippocampus became swollen and contracted, and there were edema, hyperemia and bleeding in the meninges or ependymal membranes. The low-dose group appeared to have some mild symptoms, such as edema, congestion and hemorrhage. However, the pathological changes in the brain tissue of rats in the middle- and high-dose groups were not significantly different from those in the quiet control group. Immunohistochemical staining showed that the expression levels of β-catenin and glycogen synthase kinase 3β in the brain tissue of the exercise control group were higher than those in the quiet control group (P < 0.01). In the middle- and high-dose group, the expression levels of β-catenin and glycogen synthase kinase 3β in the brain tissue were lower than those of the exercise control group (P < 0.01). The mRNA and protein expressions of β-catenin and glycogen synthase kinase 3β in the brain tissue of the exercise control group were higher than those in the quiet control group (P < 0.05 or P < 0.01). The expressions of β-catenin and glycogen synthase kinase 3β mRNA and protein in the middle- and high-dose groups were lower than those in the exercise control group (P < 0.05 or P < 0.01). To conclude, exhaustive exercise could give rise to damage in the rat brain tissue, and upregulate the expressions of β-catenin and glycogen synthase kinase 3β, whereas the total flavonoids in Pueraria lobata may effectively reduce damage to the rat brain tissue by regulating the expressions of β-catenin and glycogen synthase kinase 3β, thereby protecting the brain tissue.

Key words: total flavonoids in Pueraria lobata, exhaustive exercise, brain tissue, β-catenin, glycogen synthase kinase 3β, pathway, rat

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