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 25(21):38-44(2019)
DOI:
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 25(21):38-44(2019) DOI: 10.13422/j.cnki.syfjx.20192140.
Modified Shuyuwan Ameliorate Neuronal Apoptosis of APP/PS1 Mice Via Akt/GSK3β/Nrf2 Pathway
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.
关键词
阿尔茨海默病加减薯蓣丸核因子E2相关因子2内质网应激凋亡
Keywords
Alzheimer's diseasemodified Shuyuwannuclear factor erythroid-2 related factor 2endoplasmic reticulum stressapoptosis
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