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1.广西中医药大学 药学院,南宁 530200
2.右江民族医学院 基础医学院,广西 百色 533000
3.右江民族医学院 药学院,广西 百色 533000
4.右江民族医学院 临床医学院,广西 百色 533000
苏彦兆,在读硕士,从事老年性痴呆基础研究,E-mail:729011126@qq.com
* 黄忠仕,博士,教授,从事老年性痴呆基础研究,Tel:0776-2848023,E-mail:hzs1004@163.com
收稿日期:2020-09-03,
网络出版日期:2020-11-04,
纸质出版日期:2021-02-20
移动端阅览
苏彦兆,吴文雪,刘超宇等.二苯乙烯苷对APP/PS1/Tau三转基因小鼠痴呆模型GSK3β,PKA,PP2A的影响[J].中国实验方剂学杂志,2021,27(04):64-69.
SU Yan-zhao,WU Wen-xue,LIU Chao-yu,et al.Effect of TSG on GSK3β,PKA and PP2A of APP/PS1/Tau Triple-transgenic Mice Dementia Model[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(04):64-69.
苏彦兆,吴文雪,刘超宇等.二苯乙烯苷对APP/PS1/Tau三转基因小鼠痴呆模型GSK3β,PKA,PP2A的影响[J].中国实验方剂学杂志,2021,27(04):64-69. DOI: 10.13422/j.cnki.syfjx.20202305.
SU Yan-zhao,WU Wen-xue,LIU Chao-yu,et al.Effect of TSG on GSK3β,PKA and PP2A of APP/PS1/Tau Triple-transgenic Mice Dementia Model[J].Chinese Journal of Experimental Traditional Medical Formulae,2021,27(04):64-69. DOI: 10.13422/j.cnki.syfjx.20202305.
目的
2
观察二苯乙烯苷(TSG)对淀粉样前体蛋白/早老蛋白-1/Tau(APP/PS1/Tau)三转基因小鼠阿尔茨海默病(AD)模型脑组织中糖原合成酶激酶3
β
(GSK3
β
),环磷酸腺苷依赖的蛋白激酶(PKA),磷酸丝氨酰/磷酸苏氨酰蛋白磷酸酶2A(PP2A)的表达影响。
方法
2
8月龄APP/PS1/Tau三转基因小鼠45只,随机分为模型组、石杉碱甲组(石杉碱甲,0.15 mg·kg
-1
),TSG低、中、高剂量组(TSG,0.033,0.1,0.3 g·kg
-1
),每组9只。另取同龄C5B7L/6J小鼠9只为正常组。各组灌胃60 d相应药物后,采用苏木素-伊红(HE)染色观察小鼠海马神经元的一般结构;免疫组化(IHC)检测各组小鼠脑组织PKA蛋白的表达;实时荧光定量聚合酶链式反应(Real-time PCR)检测GSK3
β
,PKA,PP2A mRNA表达情况;蛋白免疫印迹法(Western blot)检测GSK3
β
,PP2A蛋白表达情况。
结果
2
与正常组比较,模型组小鼠神经元细胞的凋亡水平显著升高,GSK3
β
,PKA蛋白及mRNA表达水平显著升高(
P
<
0.01),PP2A蛋白及mRNA表达水平显著下调(
P
<
0.01);与模型组比较,各给药组小鼠神经元细胞凋亡水平显著下调,GSK3
β
,PKA蛋白及mRNA表达水平明显下调(
P
<
0.05,
P
<
0.01),PP2A蛋白及mRNA表达水平明显升高(
P
<
0.05,
P
<
0.01)。
结论
2
TSG治疗AD的机制可能与降低GSK3
β
和PKA mRNA表达水平与蛋白表达水平,提高PP2A的mRNA表达水平与蛋白表达水平等机制有关。
Objective
2
To observe the effect of tetrahydroxy stilbene glycoside (TSG) on the expression of glycogen synthase kinase 3
β
(GSK3
β
), cyclic adenosine monophosphate-dependent protein kinase (PKA) and Serine/threonine phosphatase 2A(PP2A) in the brain of amyloid precursor protein/presenilin-1/Tau (APP/PS1/Tau) triple-transgenic mice dementia model.
Method
2
A total of forty-five 8-month-old APP/PS1/Tau transgenic mice were randomly divided into model group, positive control group (Huperzine-A, 0.15 mg·kg
-1
), low, medium and high dose TSG groups (TSG, 0.033,0.1,0.3 g·kg
-1
), with 9 mice in each group, and another nine C5B7L/6J mice of the same age were selected as normal control group. After 60 days of intragastric administration, the general structure of hippocampal neurons was observed by hematoxylin-eosin (HE) staining, immunohistochemical (IHC) was used to detect the expression of PKA protein in the brain of mice in each group, the mRNA expression levels of GSK3
β
, PKA and PP2A were detected by real time quantitative reverse transcription polymerase chain reaction (Real-time PCR), and protein expression levels of GSK3
β
and PP2A were detected by Western blot.
Result
2
Compared with the normal control group, the apoptosis level of neurons in the model group was significantly increased, the protein and mRNA expression levels of GSK3
β
and PKA were significantly increased (
P
<
0.05,
P
<
0.01), and the protein and mRNA expression levels of PP2A were significantly decreased (
P
<
0.05,
P
<
0.01). Compared with the model group, the apoptosis level of neurons in each treatment group was significantly down-regulated, the protein and mRNA expression levels of GSK3
β
and PKA were significantly down-regulated (
P
<
0.05,
P
<
0.01), and the protein and mRNA expression levels of PP2A were significantly increased (
P
<
0.05,
P
<
0.01).
Conclusion
2
The mechanism of TSG in the treatment of Alzheimer's disease (AD) may be related to lowering the transcription and expression of GSK3
β
and PKA, increasing the transcription and expression of PP2A.
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