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1.湖北中医药大学,武汉 430065;
2.湖北省中医院,武汉 430061
邱静,在读博士,从事中医药防治脑病的基础研究,E-mail:qiujing@163.com
谭子虎,博士,主任医师,博士生导师,从事中医药防治心脑血管疾病的临床与基础研究,E-mail:tanzihu2008@163.com
收稿日期:2019-06-18,
网络出版日期:2019-07-19,
纸质出版日期:2019-11-05
移动端阅览
邱静, 谭子虎, 杨琼, 等. 加减薯蓣丸通过Akt/GSK3
Jing QIU, Zi-hu TAN, Qiong YANG, et al. Modified Shuyuwan Ameliorate Neuronal Apoptosis of APP/PS1 Mice Via Akt/GSK3β/Nrf2 Pathway[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(21): 38-44.
邱静, 谭子虎, 杨琼, 等. 加减薯蓣丸通过Akt/GSK3
Jing QIU, Zi-hu TAN, Qiong YANG, et al. Modified Shuyuwan Ameliorate Neuronal Apoptosis of APP/PS1 Mice Via Akt/GSK3β/Nrf2 Pathway[J]. Chinese journal of experimental traditional medical formulae, 2019, 25(21): 38-44. DOI: 10.13422/j.cnki.syfjx.20192140.
目的:
2
探讨加减薯蓣丸对APP/PS1模型小鼠神经保护的效应和作用机制。
方法:
2
5月龄雄性APP/PS1小鼠20只和野生型小鼠10只,分为空白组、模型组、加减薯蓣丸组(14 g·kg
-1
·d
-1
),灌胃28 d,空白组、模型组给予等体积生理盐水;APP/PS1背景和野生型背景原代神经元,分为空白组、模型组、加减薯蓣丸组、衣霉素组和磷脂酰肌醇-3-激酶(PI3K)/蛋白激酶B(Akt)抑制剂组,空白组、模型组给予10%空白血清,加减薯蓣丸组给予5%加减薯蓣丸含药血清干预,衣霉素组和PI3K/Akt抑制剂组分别在加减薯蓣丸基础上加用2 mg·L
-1
的衣霉素和10 μmol·L
-1
的LY294002。采用Morris水迷宫检测小鼠学习记忆能力;采用蛋白免疫印迹法(Western blot)检测海马核因子E2相关因子2(Nrf2)蛋白表达;Western blot检测内质网应激相关蛋白糖调节蛋白78(GRP78),蛋白激酶样内质网激酶(PERK),磷酸化(p-)PERK,凋亡通路蛋白真核生物的翻译起始因子2的
α
亚基(eIF2
α
),p-eIF2
α
,增强子结合蛋白同源蛋白(CHOP),半胱氨酸蛋白酶-3(Caspase-3)和p-Akt,Akt,糖原激酶3
β
(GSK3
β
),Nrf2蛋白表达。
结果:
2
体内实验中,与空白组比较,模型组APP/PS1小鼠学习记忆能力显著下降(
P
<
0.01),海马Nrf2表达显著下调(
P
<
0.01);与模型组比较,加减薯蓣丸干预4周后,加减薯蓣丸组APP/PS1小鼠学习记忆能力明显提升,海马Nrf2表达水平显著增加(
P
<
0.01)。体外实验中,与空白组比较,模型组GRP78,p-PERK/PERK,p-eIF2
α
/eIF2
α
,CHOP,cleaved Caspase-3蛋白表达显著增加(
P
<
0.01);与模型组比较,加减薯蓣丸含药血清明显降低GRP78,p-PERK/PERK,p-eIF2
α
/eIF2
α
,CHOP,cleaved Caspase-3蛋白表达(
P
<
0.05,
P
<
0.01);而衣霉素抑制加减薯蓣丸对内质网应激诱导凋亡的保护效应(
P
<
0.05);与空白组比较,模型组p-Akt/Akt,Nrf2蛋白表达显著下降,GSK-3
β
表达显著增加(
P
<
0.01);与模型组比较,加减薯蓣丸含药血清干预后p-Akt/Akt,Nrf2蛋白表达显著增加,GSK-3
β
表达明显降低(
P
<
0.05,
P
<
0.01);LY294002抑制加减薯蓣丸对p-Akt/Akt,Nrf2和GSK3
β
蛋白表达的影响(
P
<
0.05,
P
<
0.01)。
结论:
2
加减薯蓣丸通过PI3K/Akt/GSK3
β
信号通路上调Nrf2蛋白表达,减轻内质网应激诱导的神经元凋亡,改善APP/PS1模型小鼠学习记忆能力。
Objective:
2
To explore the effect and mechanism of modified Shuyuwan neuroprotection in APP/PS1 model mice .
Method:
2
Selecting 20 male APP/PS1 mice of 5 months old and 10 wild type mice.The mice were divided into blank group
model group and modified Shuyuwan group(14 g·kg
-1
·d
-1
)
drug delivery for 28 days
and blank group and model group were given the same amount of normal saline
APP/PS1 background primary neuron model and wild type primary neurons were divided into blank group
model group and modified Shuyuwan group
tunicamycin group
phosphatidylinositol 3-kinase (PI3K)/protein kinase B (Akt) inhibitor group.The blank group and model group were given 10%blank serum
the modified Shuyuwan group was given 5%modified Shuyuwan-containing serum
the tunicamycin group and the PI3K/Akt inhibitor group were respectively added with 2 mg·L
-1
tunicamycin and 10 μmol·L
-1
LY294002 on the basis of 5%modified Shuyuwan-containing serum.The spatial learning and memory ability of mice was measured by Morris water maze
and Western blot was used to detect nuclear factor erythroid-2 related factor 2(Nrf2) protein expression in hippocampus.Western blot was used to detect the protein expression of endoplasmic reticulum stress related proteins glucose regulatory protein 78(GRP78)
protein kinase-like endoplasmic reticulum kinase(PERK)
phosphorylation (p-)PERK and apoptosis expression of the pathway proteins eukaryotic translation initiation factor 2
α
(eIF2
α
)
p-eIF2
α
enhancer binding protein homologous protein(CHOP)
and cysteinyl aspartate apecific proteinase 3 (Caspase-3)
p-Akt
Akt
Glycogen Synthase kinase-3
β
(GSK3
β
)
Nrf2.
Result:
2
In vivo
experiment
compared with blank group
the learning and memory ability of APP/PS1 mice in the model group was impaired(
P
<
0.01)
and the expression level of Nrf2 in the hippocampus was decreased(
P
<
0.01). Compared with model group
after 4 weeks of modified Shuyuwan intervention
the learning and memory ability of APP/PS1 mice in the modified Shuyuwan group was improved
and the expression level of Nrf2 in the hippocampus was significantly increased(
P
<
0.01).
In vitro
experiment
Western blot analysis showed that compared with the blank group
the expression of GRP78
p-PERK/PERK
p-eIF2
α
/eIF2
α
CHOP
and cleaved Caspase-3 proteins was increased in the model group(
P
<
0.01). Compared with model group
modified Shuyuwan-containing serum intervention significantly reduced the expression of GRP78
p-PERK/PERK
p-eIF2
α
/eIF2
α
CHOP
and cleaved Caspase-3 proteins(
P
<
0.05
P
<
0.01). Whereas tunicamycin inhibited the protection effect of SHhuyuwan on the endoplasmic reticulum and ERS-induced apoptosis(
P
<
0.05). Western blot results showed that compared with blank group
the expression of p-Akt/Akt and Nrf2 protein was significantly decreased and the expression of GSK-3
β
was increased in the model group(
P
<
0.01). Compared with model group
the expression of p-Akt/Akt and Nrf2 protein was significantly increased and the expression of GSK-3
β
was decreased after modified Shuyuwan-containing serum intervention(
P
<
0.05
P
<
0.01). The effect of modified Shuyuwan on the expression of p-Akt
Nrf2 and GSK3
β
protein was inhibited by LY294002.(
P
<
0.05
P
<
0.01).
Conclusion:
2
Modified Shuyuwan can increase Nrf2 protein expression through PI3K/Akt/GSK3
β
signaling pathway
reduce neuronal apoptosis induced by endoplasmic reticulum stress
improve the learning and memory ability of APP/PS1 model mice.
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