QIU Qi,HU Zhong-hua,XU Hong-dan,et al.Effect of Naringenin on Oxidative Stress and Tau Protein Phosphorylation of Aβ25-35-induced PC12 Cell Injury[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(21):92-99.
QIU Qi,HU Zhong-hua,XU Hong-dan,et al.Effect of Naringenin on Oxidative Stress and Tau Protein Phosphorylation of Aβ25-35-induced PC12 Cell Injury[J].Chinese Journal of Experimental Traditional Medical Formulae,2020,26(21):92-99. DOI: 10.13422/j.cnki.syfjx.20202140.
Effect of Naringenin on Oxidative Stress and Tau Protein Phosphorylation of Aβ25-35-induced PC12 Cell Injury
To investigate the effects of naringenin on oxidative stress and Tau protein phosphorylation of adrenal pheochromocytoma(PC12) cells injured by
β
-amyloid(A
β
)
25-35
and its relationship with estrogen receptor(ER) and phosphatidylinositol -3 kinase/protein kinase B(PI3K/Akt) signaling pathway.
Method
2
The PC12 cells were intervened with A
β
25-35
to prepare the injury model. The experiment was divided into blank group, model group, naringenin(400,40,4,0.4,0.04,4×10
-3
,4×10
-4
,4×10
-5
μmol·L
-1
)group, positive drugs estradiol(E
2
)(1 nmol·L
-1
)+A
β
25-35
group, naringenin(0.4,0.04,4×10
-3
,4×10
-4
,4×10
-5
μmol·L
-1
)+A
β
25-35
group, E
2
+A
β
25-35
+ER antagonist(ICI182780)(1 μmol·L
-1
) group, naringenin+A
β
25-35
+ICI182780 group, E
2
+A
β
25-35
+PI3K blocker(LY294002)(50 μmol·L
-1
) group, naringenin+A
β
25-35
+LY294002 group. Methye thiazolye telrazlium(MTT)method was used to detect the cell proliferation index, 2',7'-Dichlorodi -hydrofluorescein diacetate(DCFH-DA) was used as a fluorescent probe to detect the content of reactive osygen species(ROS), the content of malondialdehyde(MDA) and the activity of superoxide dismutase(SOD) were measured by thiobarbituric acid(TBA) and oxidase methods, Western blot was used to detect the expression of phosphorylated Tau protein/total Tau protein(p-Tau/t-Tau).
Result
2
According to the results of MTT experiment, 0.4
μmol·L
-1
was selected as the best effective concentration of naringenin, compared with the blank group, the cell proliferation index of model group decreased significantly (
P
<
0.01), compared with model group, the cell proliferation index of naringenin+A
β
25-35
group increased significantly (
P
<
0.01). In addition, compared with blank group, the content of ROS, MDA and the expression of p-Tau/t-Tau in the model group increased significantly (
P
<
0.01), and the activity of SOD decreased significantly (
P
<
0.01), compared with model group, the content of ROS, MDA and the expression of p-Tau/t-Tau in naringenin+A
β
25-35
group decreased significantly (
P
<
0.01), and the activity of SOD increased significantly (
P
<
0.01), compared with naringenin+A
β
25-35
group, the addition of ICI182780 and LY294002 significantly reversed the role of naringenin in the above indicators (
P
<
0.01). The effect of naringenin was similar to that of E
2
.
Conclusion
2
Naringenin can improve the cell proliferation index and protect PC12 cells from A
β
25-35
injury, which may be achieved by activating ER and PI3K/Akt signaling pathway to reduce ROS, MDA content, p-Tau/t-Tau expression and promote SOD activity.
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