High glucose induces myocardial cell injury through increasing reactive oxygen species production
- Author:
Yu-Jun WANG
1
;
Li YU
1
;
Xiao-Yu LYU
2
;
Yu-Jun WANG
3
;
Xiao-Yu LYU
3
Author Information
- Publication Type:Journal Article
- Keywords: Apoptosis; Diabetic cardiomyopathy; High glucose; Myocardial cells; Reactive oxygen species; S Collagen
- From: Asian Pacific Journal of Tropical Medicine 2018;11(1):63-67
- CountryChina
- Language:Chinese
- Abstract: Objective: To study the injury effect and molecular mechanism of high glucose on myocardial cells. Methods: Myocardial cells H9c2 were cultured and divided into the control group treated with DMEM containing 5.5 mmol/L glucose, the high glucose group treated with DMEM containing 35 mmol/L glucose, and the N-acetylcysteine (NAC) group pre-treated with 1000 ?mol/L NAC and treated with DMEM containing 1000 ?mol/L NAC and 35 mmol/L glucose. The production of ROS and the expression of mitochondria pathway apoptosis molecules in cells as well as the contents of collagen and collagen metabolism molecules were measured. Results: After 8 h, 16 h and 24 h of treatment, ROS RFU as well as Bax, CytC, Caspase-3 and Caspase-9 protein expression in cells and Col-I, Col-III, PINP and PIIINP protein levels in culture medium of high glucose group were higher than those of control group, Bcl-2 protein expression were lower than those of control group, but CTX-I protein levels in culture medium were not significantly different from those of control group; after 24 h of treatment, Bax, CytC, Caspase-3 and Caspase-9 protein expression in cells as well as Col-I, Col-III, PINP and PIIINP protein levels in culture medium of NAC group were lower than those of high glucose group whereas Bcl-2 protein expression was higher than that of high glucose group. Conclusions: High glucose can induce myocardial cell apoptosis, increase collagen synthesis and accelerate interstitial fibrosis by increasing the production of reactive oxygen species.
