Mechanism of Dabuyuan Jian in Promoting Neurogenesis of Hippocampus in APP/PS1 Double Transgenic Dementia Mice Based on Wnt/<italic style="font-style: italic">β</italic>-catenin Signaling Pathway

Li-ling HE; Qing-hua LONG; Hui HU; Ping WANG; He-yuan SHI

doi:10.13422/j.cnki.syfjx.20200601

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Mechanism of Dabuyuan Jian in Promoting Neurogenesis of Hippocampus in APP/PS1 Double Transgenic Dementia Mice Based on Wnt/β-catenin Signaling Pathway

Classic Prescriptions | 更新时间：2021-02-09

- Mechanism of Dabuyuan Jian in Promoting Neurogenesis of Hippocampus in APP/PS1 Double Transgenic Dementia Mice Based on Wnt/β-catenin Signaling Pathway
- Chinese Journal of Experimental Traditional Medical Formulae Vol. 26, Issue 7, Pages: 8-14(2020)
- 作者机构：
  
  1.湖北中医药大学　基础医学院，武汉　 430065
  2.湖北中医药大学　护理学院，武汉　 430065
- 作者简介：
- 基金信息：
- DOI：10.13422/j.cnki.syfjx.20200601
  CLC： R2-0; R22; R285.5; R289
- Received：13 September 2019，
  
  Published Online：06 December 2019，
  
  Published：05 April 2020
- 稿件说明：
移动端阅览
Li-ling HE, Qing-hua LONG, Hui HU, et al. Mechanism of Dabuyuan Jian in Promoting Neurogenesis of Hippocampus in APP/PS1 Double Transgenic Dementia Mice Based on Wnt/β-catenin Signaling Pathway[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(7): 8-14.
DOI：

Li-ling HE, Qing-hua LONG, Hui HU, et al. Mechanism of Dabuyuan Jian in Promoting Neurogenesis of Hippocampus in APP/PS1 Double Transgenic Dementia Mice Based on Wnt/β-catenin Signaling Pathway[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(7): 8-14. DOI： 10.13422/j.cnki.syfjx.20200601.

摘要

目的：

通过研究大补元煎对淀粉样前体蛋白/早老素1(APP/PS1)小鼠海马Wnt/

-连环蛋白(

-catenin)信号通路的作用，探讨大补元煎促进神经发生的可能机制。

方法：

5月龄APP/PS1小鼠30只和野生鼠10只，分为正常组、模型组、奈哌齐组(6.5×10

-4

g·kg

-1

·d

-1

)和大补元煎组(13.2 g·kg

-1

·d

-1

)，灌胃30 d，正常组和模型组给予等体积生理盐水。应用水迷宫评价小鼠学习记忆力；应用苏木素-伊红(HE)染色观察小鼠海马神经元病理形态变化；应用免疫组化(IHC)检测5-溴脱氧尿苷(Brdu)，肾上腺皮质激素(Dcx)和神经元核抗原(NeuN)的阳性细胞数；应用实时荧光定量聚合酶链式反应(Real-time PCR)和蛋白免疫印迹法(Western blot)检测小鼠海马中

-catenin，糖原合成酶激酶-3

(GSK-3

) mRNA和蛋白表达水平。

结果：

与正常组比较，模型组小鼠平台潜伏期和游泳总路程显著升高(

0.01)，而穿越平台次数和目标象限时间显著降低(

0.01)；与模型组比较，多奈哌齐组和大补元煎组小鼠平台潜伏期和游泳总路程降低(

0.05，

0.01)，而穿越平台次数和目标象限时间升高(

0.05)。与正常组比较，模型组小鼠海马齿状回(DG)区神经元层次和数量减少，可见明显坏死的神经元；与模型组比较，多奈哌齐组和大补元煎组小鼠海马DG区神经元层次和数量增多，坏死神经元数量减少。与正常组比较，模型组小鼠海马DG区Brdu，Dcx和NeuN标记的阳性细胞数明显降低(

0.01)；与模型组比较，多奈哌齐组和大补元煎组小鼠海马DG区Brdu，Dcx和NeuN标记的阳性细胞数增加(

0.05，

0.01)。与正常组比较，模型组小鼠海马中

-catenin mRNA和蛋白表达水平显著下降(

0.01)，而GSK-3

的基因和蛋白表达水平显著升高(

0.01)；与模型组比较，多奈哌齐组和大补元煎组小鼠海马

-catenin mRNA和蛋白表达水平升高(

0.05，

0.01)，而GSK-3

mRNA和蛋白表达水平下降(

0.05，

0.01)。

结论：

大补元煎通过调节Wnt/

-catenin信号通路促进APP/PS1双转基因小鼠海马神经发生。

Abstract

Objective:

To investigate the possible mechanism of Dabuyuan Jian to promote neurogenesis by studying the effect of Dabuyuan Jian on Wnt/

-catenin signaling pathway in hippocampus of amyloid precursor protein/presenilil(APP/PS1) mice.

Method:

Totally 30 5-month-old APP/PS1 mice and 10 wild mice were divided into control group

model group

donepezil group (6.5×10

-4

g·kg

-1

·d

-1

) and Dabuyuan Jian group (13.2 g·kg

-1

·d

-1

)

and given drugs by gavage for 30 days. The control group and the model group were given an equal volume of saline. The learning and memory of mice were evaluated by water maze. The pathological changes of hippocampal neurons were observed by hematoxylin-eosin (HE) staining. The immunohistochemistry (IHC) was used to detect label positive cells of 5-bromodeoxyuridine (Brdu)

adrenocortical hormone (Dcx) and neuronal nuclear antigen (NeuN). Real-time fluorescence quantitative polymerase chain reaction (Real-time PCR) and Western bolt were used to detect the mRNA and protein expression levels of

-catenin and glycogen synthase kinase-3

(GSK-3

) in hippocampus of mice.

Result:

Compared with the control group

the latency and swimming total distance of the model group were significantly increased (

0.01)

while the number of crossing platforms and the target quadrant time were significantly reduced (

0.01). Compared with the model group

the platform latency and the total swimming distance of the donepezil group and the Dabuyuan Jian group were decreased (

0.05

0.01)

while the number of crossing platforms and the target quadrant time were increased (

0.05). Compared with the control group

the number of neurons in the hippocampal dentate gyrus (DG) area of the model group was decreased

and necrotic neurons were observed. Compared with the model group

the number of neurons in the hippocampal DG area of the mice in the donepezil group and the Dabuyuan Jian group was increased

while the number of necrotic neurons was decreased. Compared with the control group

the number of positive cells labeled with Brdu

Dcx and NeuN in the hippocampal DG area of the model group was significantly decreased (

0.01). Compared with the model group

the number of positive cells labeled with Brdu

Dcx and NeuN in the hippocampal DG area of the donepezil group and the Dabuyuan Jian group was increased (

0.05

0.01). Compared with the control group

gene and protein expression levels of

-catenin in the hippocampus of the model group were significantly decreased (

0.01)

whereas gene and protein expression levels of GSK-3

were significantly increased (

0.01). Compared with the model group

gene and protein expression levels of

-catenin in hippocampus of donepezil group and Dabuyuan Jian group were increased (

0.05

0.01)

while gene and protein expression levels of GSK-3

were increased (

0.05

0.01).

Conclusion:

Dabuyuan Jian could promote hippocampal neurogenesis in APP/PS1 double transgenic mice by regulating Wnt/

-catenin signaling pathway.

关键词

Keywords

references

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Mechanism of Dabuyuan Jian in Promoting Neurogenesis of Hippocampus in APP/PS1 Double Transgenic Dementia Mice Based on Wnt/β-catenin Signaling Pathway

DOI：10.13422/j.cnki.syfjx.20200601

摘要

Abstract

关键词

Keywords

references