Tetramethylpyrazine protects rat astrocytes against H2O2-induced oxidative stress injury
第三军医大学学报2021年43卷第3期 页码:226-233
Affiliations:
1.Chongqing Key Laboratory of Traditional Chinese Medicine for Prevention and Treatment of Metabolic Diseases, College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016
2.Department of Special Environmental Warfare Injury Prevention and Control, Institute of Surgery Research, Army Characteristic Medical Center, Chongqing, 400042
3.Department of Orthopedics, Chongqing Orthopedic Hospital of Traditional Chinese Medicine, Chongqing, 400010, China
Qin YANG, Guodong QI, Yamin WU, et al. Tetramethylpyrazine protects rat astrocytes against H2O2-induced oxidative stress injury[J]. Journal of Third Military Medical University, 2021, 43(3): 226-233.
Qin YANG, Guodong QI, Yamin WU, et al. Tetramethylpyrazine protects rat astrocytes against H2O2-induced oxidative stress injury[J]. Journal of Third Military Medical University, 2021, 43(3): 226-233. DOI: 10.16016/j.1000-5404.202008129.
To investigate the protective effect of tetramethylprazine (TMP) on oxidative stress injur
y induced by hydrogen peroxide (H
2
O
2
) in rat astrocytes.
Methods
2
Astrocytes were isolated from SD newborn rats (24~48 h old) and cultured
and then the cells were randomly divided into control group (cultured with normal culture medium)
model group (100 μmol·L
-1
H
2
O
2
for 24 h)
TMP groups (pretreatment of 25
50
100 μmol·L
-1
TMP for 48 h
and then H
2
O
2
was added for 24 h). CCK-8 assay was used to detect cell survival rate
GFAP staining to observe cell morphology
flow cytometry to detect cell apoptosis
corresponding reagent test kits to detect the lactate dehydrogenase (LDH) content and superoxide dismutase (SOD) activity
real-time fluorescent quantitative PCR to measure the detect the mRNA expression of PI3K
AKT
Bcl-2
Bax and Caspase-3
and Western blotting to test the protein expression levels of PI3K
AKT
p-AKT
Bcl-2
Bax and Caspase-3 in each group of cells.
Results
2
The model group had significantly reduced cell survival rate (
P
<
0.05)
increased apoptotic rate (
P
<
0.05)
elevated LDH content (
P
<
0.05)
decreased SOD activity (
P
<
0.05); down-regulated PI3K
AKT
Bcl-2 mRNA and protein levels
and up-regulated the expression levels of Bax and Caspase-3 mRNA and protein levels (
P
<
0.05). Compared with the model group
TMP pretreatment resulted in significantly increased cell survival rate (
P
<
0.05)
lowest apoptotic rate (
P
<
0.05) and LDH content (
P
<
0.05)
enhanced SOD activity (
P
<
0.05)
up-regulation of PI3K
AKT
and Bcl-2 at mRNA and protein levels
and down-regulation of Bax and Caspase-3 at mRNA and protein levels (
P
<
0.05).
Conclusion
2
TMP exerts protective effects on oxidative stress injury of rat astrocytes i
nduced by H
2
O
2
and improves cell morphology and inhibits cell apoptosis after injury
and this effect may be related to the regulation of PI3K and p-AKT activation.
关键词
Keywords
references
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