Ling WU, Qin ZHENG, Yuan-yuan GUO, et al. Effect of Zhenxin Shengshui Yizhi Fang on Damage of Human Brain Microvascular Endothelial Cells Induced by Aβ25-35[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(5): 26-33.
DOI:
Ling WU, Qin ZHENG, Yuan-yuan GUO, et al. Effect of Zhenxin Shengshui Yizhi Fang on Damage of Human Brain Microvascular Endothelial Cells Induced by Aβ25-35[J]. Chinese journal of experimental traditional medical formulae, 2020, 26(5): 26-33. DOI: 10.13422/j.cnki.syfjx.20200204.
Effect of Zhenxin Shengshui Yizhi Fang on Damage of Human Brain Microvascular Endothelial Cells Induced by Aβ25-35
To observe the neuroprotective effect and potential mechanism of Zhenxin Shengshui Yizhi Fang(XSF) aqueous extract on human brain microvascular endothelial cells (HBMEC) injury induced by amyloid-
β
protein(A
β
)
25-35
.
Method:
2
HBMEC cells damage induced by A
β
25-35
was used as Alzheimer' s disease(AD) cell model. The study included control group
A
β
25-35
group
and low
medium and high-dose XSF aqueous extract groups (125
250
500 mg·L
-1
). After treatment
the cytotoxicity of different concentrations of drugs and A
β
25-35
was determined by methyl thiazolyl tetrazolium(MTT) colorimetry. Apoptosis was observed by Hoechst-33258 staining. The activity of Caspase-3 was detected by colorimetry. Western blot was used to detect the expression levels of the receptor of advanced glycation end products (RAGE) and low-density lipoprotein receptor-related protein (LRP1).
Result:
2
Compared with the control group
the cell viability of A
β
25-35
group was significantly decreased (
P
<
0.01). Hoechst-33258 staining showed bright blue fluorescence
chromatin condensation
dense staining or fragmentation dense staining
whitening in color
and significant increase of the percentage of apoptotic cells (
0.01). Western blot showed that RAGE protein expression increased significantly (
P
<
0.01)
while low-density lipoprotein receptor-related protein(LRP1)
glucose transporter 1(GLUT1) and GLUT3 protein expressions decreased significantly (
P
<
0.01). Compared with the A
β
25-35
group
the cell viability of XSF aqueous extract groups was significantly increased in a dose-dependent manner. The XSF aqueous extract had a more significant protective effect of than the other groups (
P
<
0.05). The XSF aqueous extract group (500 mg·L
-1
) significantly inhibited the number of apoptotic cells (
P
<
0.01)
but significantly reduced the Caspase-3 activity (
P
<
0.01). RAGE protein expression was not significantly decreased in XSF aqueous extract group (125 mg·L
-1
)
but significantly decreased in XSF aqueous extract group (250
500 mg·L
-1
P
<
0.01)
while LRP1
GLUT1 and GLUT3 protein expression significantly increased (
P
<
0.05
P
<
0.01) in a dose-dependent manner.
Conclusion:
2
XSF aqueous extract can attenuate the cytotoxicity of HBMEC induced by A
β
25-35
oligomer
inhibit apoptosis
decrease caspase-3 activity and RAGE protein expression
increase LRP1
GLUT1 and GLUT3 protein expressions
and reduce the abnormal accumulation and deposition of A
β
in the brain
which may be its mechanisms for prevention and treatment of AD.
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