Effects of Danshen Tongluo Jiedu Decoction Medicated Serum for Regulating miR-126 Expression on Autophagy in Hypoxia/Reoxygenation Myocardial Microvascular Endothelial Cells of Rats
10.19879/j.cnki.1005-5304.202312468
- VernacularTitle:丹参通络解毒汤含药血清调控miR-126表达对缺氧/复氧大鼠心肌微血管内皮细胞自噬的影响
- Author:
Mengfan YAN
1
;
Yongzhao LIU
;
Caiyun LI
;
Xinhui LI
Author Information
1. 湖南中医药大学中医学院,湖南 长沙 410208
- Keywords:
Danshen Tongluo Jiedu Decoction;
miR-126;
hypoxia/reoxygenation;
autophagy;
myocardial ischemia-reperfusion injury;
CMECs
- From:
Chinese Journal of Information on Traditional Chinese Medicine
2024;31(11):136-141
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effects of Danshen Tongluo Jiedu Decoction medicated serum for regulating miR-126 on autophagy in hypoxia/reoxygenation myocardial microvascular endothelial cells(CMECs)of rats.Methods Hypoxia/reoxygenation injury cell model was constructed by culturing CMECs in vitro.The cells were divided into blank group,model group,TCM group,silencing group,empty vector group,and silencing+TCM group by lentivirus transfection with miR-126 inhibitor.Lactate dehydrogenase(LDH)content in the supernatant of CMECs was detected using a reagent kit,and cell apoptosis rate was detected using flow cytometry,the miR-126 mRNA expression was detected using RT-PCR,the expressions of autophagy-related proteins Atg5,Beclin1 and p62 proteins were detected by Western blot.Results Compared with the blank group,the LDH content in the supernatant of the model group cells significantly increased,the apoptosis rate significantly increased,the miR-126 mRNA expression significantly decreased,the Atg5 and Beclin1 protein expressions significantly increased,and the p62 protein expression significantly decreased,with statistical significance(P<0.01).Compared with the model group,the TCM group and the silencing+TCM group showed a significant decrease in LDH content in the cell supernatant,a significant decrease in cell apoptosis rate,a significant increase in miR-126 mRNA expression,a significant decrease in Atg5 and Beclin1 protein expressions,and a significant increase in p62 protein expression in the TCM group,with statistical significance(P<0.05,P<0.01);the LDH content in the supernatant,apoptosis rate,Atg5 and Beclin1 protein expressions of the silence group cells significantly increased,while miR-126 mRNA expression significantly decreased(P<0.01).Compared with the TCM group,the LDH content in the cell supernatant and apoptosis rate of the silence group and the silencing+TCM group significantly increased(P<0.05,P<0.01),while the miR-126 mRNA expression significantly decreased(P<0.01);the expressions of Atg5 and Beclin1 proteins in the silence group significantly increased(P<0.01),and the expression of p62 protein significantly decreased(P<0.01).Compared with the silence group,the LDH content in the cell supernatant,apoptosis rate,and Atg5 and Beclin1 protein expression of the empty vector group group and the silencing+TCM group were significantly decreased(P<0.01),the miR-126 mRNA and p62 protein expression significantly increased(P<0.05,P<0.01).Conclusion Danshen Tongluo Jiedu Decoction medicated serum can inhibit autophagy and apoptosis of CMECs caused by hypoxia/reoxygenation injury,thereby protecting CMECs.Its mechanism may be related to promoting miR-126 expression.
