SHI Yi-lin,YANG Ao-lin,WANG Rui-jie,et al.Coenzyme Q10 Inhibits Hydrogen Peroxide-Induced Mitochondrial Dysfunction in Platelets[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(01):70-76.
SHI Yi-lin,YANG Ao-lin,WANG Rui-jie,et al.Coenzyme Q10 Inhibits Hydrogen Peroxide-Induced Mitochondrial Dysfunction in Platelets[J].Journal of Sun Yat-sen University(Medical Sciences),2022,43(01):70-76. DOI: 10.13471/j.cnki.j.sun.yat-sen.univ(med.sci).2022.0109.
Coenzyme Q10 Inhibits Hydrogen Peroxide-Induced Mitochondrial Dysfunction in Platelets
)-induced platelet mitochondrial dysfunction and the underlying mechanisms.
Methods
2
Peripheral venous blood from healthy volunteers was collected to prepare gel-filtered platelet suspension. Gel-filtered platelets were incubated with 100 μmol/L CoQ
10
for 50 min followed by 30 min incubation with H
2
O
2
(
n
≥3 per group). Mitochondrial membrane potential, phosphatidylserine (PS) exposure ratio and mitochondrial reactive oxygen species (mtROS) were measured by flow cytometry. Concentrations of total cellular ROS and ATP were measured by microplate reader. The phosphorylation level of platelet protein p53 and expression levels of Bcl-2 and Bcl-xL were detected by Western blot.
Results
2
In resting platelets, CoQ
10
had no effect on mitochondrial function (mitochondrial membrane potential, PS exposure positive rate, intracellular ROS, mtROS, ATP levels,
P
>
0.05). In the oxidative stress model, H
2
O
2
significantly decreased platelet mitochondrial membrane potential and increase PS exposure in platelets. CoQ
10
significantly inhibited the dissipation of mitochondrial membrane potential induced by H
2
O
2
[(35.76%±3.94)%
vs
. (21.04%±1.69)%,
P
<
0.05], without inhibitory effect on PS exposure (
P
>
0.05). Further mechanism study found that CoQ
10
directly inhibited the production of ROS and mtROS induced by H
2
O
2
(
P
<
0.05), reduced the phosphorylation level of p53 and increased Bcl-2 family expression level (
P
<
0.05) while having no effect on ATP content decrease (
P
>
0.05).
Conclusion
2
CoQ
10
inhibits H
2
O
2
-induced mitochondrial dysfunction in platelets, by reducing p53 phosphorylation and increasing the expression of Bcl-2 family survival protein.
关键词
Keywords
references
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