中国组织工程研究 ›› 2024, Vol. 28 ›› Issue (31): 4951-4957.doi: 10.12307/2024.181

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

Notch1介导有氧运动促进阿尔茨海默病小鼠海马神经细胞的增殖

李慧军1,李垂坤1,魏翠兰2,张业廷3   

  1. 1成都大学体育学院,四川省成都市   610106;2成都理工大学体育学院,四川省成都市   610059;3中国民用航空飞行学院,四川省广汉市   618307
  • 收稿日期:2023-04-04 接受日期:2023-07-04 出版日期:2024-11-08 发布日期:2024-01-22
  • 通讯作者: 张业廷,博士,讲师,中国民用航空飞行学院,四川省广汉市 618307
  • 作者简介:李慧军,男,1988年生,河南省焦作市人,汉族,2015年武汉体育学院毕业,硕士,讲师,主要从事运动与健康,体育教学与训练研究。
  • 基金资助:


Notch1-mediated aerobic exercise promotes hippocampal nerve cell proliferation in Alzheimer’s disease mice

Li Huijun1, Li Chuikun1, Wei Cuilan2, Zhang Yeting3   

  1. 1College of Physical Education, Chengdu University, Chengdu 610106, Sichuan Province, China; 2Sports Institute of Chengdu University of Technology, Chengdu 610059, Sichuan Province, China; 3Civil Aviation Flight University of China, Guanghan 618307, Sichuan Province, China
  • Received:2023-04-04 Accepted:2023-07-04 Online:2024-11-08 Published:2024-01-22
  • Contact: Zhang Yeting, PhD, Lecturer, Civil Aviation Flight University of China, Guanghan 618307, Sichuan Province, China
  • About author:Li Huijun, Master, Lecturer, College of Physical Education, Chengdu University, Chengdu 610106, Sichuan Province, China

摘要:


文题释义:

阿尔茨海默病:是一种进行性神经系统退行性疾病。它的症状包括记忆丧失、判断力下降、语言障碍、认知能力衰退等,这些症状会逐渐恶化,最终可能导致患者失去独立生活的能力。其原因是大脑神经元的死亡和神经元间连接的破坏,这通常与淀粉样蛋白质斑块和神经原纤维交织物的形成有关。阿尔茨海默病目前没有根治方法,但早期诊断和治疗可以帮助减缓疾病的进展,通过体力锻炼和认知训练结合起来可延缓认知功能下降,并改善患者的生活质量。
神经细胞增殖:是指在神经系统中产生新的神经细胞。在成年人中,神经细胞增殖通常发生在2个特定的区域:大脑海马体和嗅觉系统。 在这些区域,神经祖细胞和神经干细胞通过分裂使得神经细胞增殖。多种类型的神经细胞可以通过神经祖细胞和神经干细胞分化而来,包括少突胶质细胞、神经元及星形胶质细胞。神经细胞增殖对于学习、记忆、适应性和神经退行性疾病的治疗都有着重要的作用。


背景:阿尔茨海默病患者脑部多存在Notch1信号通路异常,但这些信号通路在阿尔茨海默病发病中的作用尚未完全明确。长期有氧运动对于Notch1信号通路的相关因子甲基化率能够产生影响,从而改变Notch1的表达。然而,有氧运动是否会通过Notch1信号通路对阿尔茨海默病小鼠海马神经细胞增殖及组织病理学特征产生影响并不清楚。

目的:观察DAPT抑制Notch1信号通路后有氧运动对阿尔茨海默病小鼠海马神经细胞增殖及组织病理学特征的影响。
方法:随机将3月龄APP/PS1双转基因阿尔茨海默病小鼠分成4组,分别为对照组、运动对照组、抑制剂组及运动抑制剂组,每组20只。采用自然喂养干预对照组,长期有氧运动干预运动组,各干预方式的周期为20周;然后在第18周对各组小鼠进行溶剂或Notch1抑制剂注射。20周后取脑组织,采用Real-time PCR、免疫荧光及Western blot技术分别检测Aβ1-42、Tau、Ki67及Notch1表达。

结果与结论:与对照组小鼠相比,抑制剂组小鼠海马齿状回区Ki67、Notch1的表达显著降低(P < 0.05),Aβ1-42、Tau没有显著差异;运动对照组小鼠海马齿状回区Ki67表达显著高于对照组,而Aβ1-42、Tau、Notch1表达显著低于对照组(P < 0.05);运动抑制剂组小鼠海马齿状回区Aβ1-42、Tau、Ki67、Notch1表达与抑制剂组相比没有显著差异。由此可见,Notch1信号通路可能介导运动改善阿尔茨海默病小鼠海马神经细胞增殖及组织病理学特征的过程。 

https://orcid.org/0000-0003-0031-2891 (张业廷)

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 阿尔茨海默病, 有氧运动, Notch1, 神经细胞增殖

Abstract: BACKGROUND: Abnormal Notch1 signaling pathway is mostly found in the brain of Alzheimer’s disease patients, but the role of these signaling pathways in the pathogenesis of Alzheimer’s disease has not been fully clarified. Long-term aerobic exercise can alter the expression of Notch1 by affecting the methylation rate of factors related to the Notch1 signaling pathway. However, it is not clear whether aerobic exercise affects hippocampal nerve cell proliferation and histopathological features of Alzheimer’s disease mice through the Notch1 signaling pathway. 
OBJECTIVE: To observe the effects of aerobic exercise on the proliferation and histopathological features of hippocampal nerve cells in Alzheimer’s disease mice after DAPT inhibited the Notch1 signaling pathway.
METHODS: APP/PS1 double transgenic Alzheimer’s disease mice aged 3 months were randomly divided into four groups: control group, exercise control group, inhibitor group, and exercise inhibitor group, with 20 mice in each group. The control group was fed naturally, and the exercise group received aerobic exercise intervention. Both natural feeding and exercise intervention lasted for 20 weeks. The mice were injected with solvent or Notch1 inhibitor at week 18. After 20 weeks, the brain tissue was collected, and Aβ1-42, Tau, Ki67, and Notch1 expression levels were detected by real-time PCR, immunofluorescence, and western blot assay.  
RESULTS AND CONCLUSION: Compared with the control group, the expressions of Ki67 and Notch1 in the dentate gyrus region of the hippocampus were significantly decreased in the inhibitor group (P < 0.05), but there were no significant differences in Aβ1-42 and Tau. The expression of Ki67 in the dentate gyrus region of the hippocampus in the exercise control group was significantly higher than that in the control group, while the expressions of Aβ1-42, Tau, and Notch1 were significantly lower than those in the control group (P < 0.05). The expressions of Aβ1-42, Tau, Ki67, and Notch1 in the dentate gyrus region of the hippocampus of the exercise inhibitor group were not significantly different from those of the inhibitor group. In conclusion, the Notch1 signaling pathway may mediate exercise to improve the proliferation and histopathological features of hippocampal nerve cells in Alzheimer’s disease mice.  

Key words: Alzheimer’s disease, aerobic exercise, Notch1, nerve cell proliferation

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