Protective effects of valsartan administration on doxorubicininduced myocardial injury in rats and the role of oxidative stress and NOX2/NOX4 signaling.
Mol Med Rep
; 22(5): 4151-4162, 2020 Nov.
Article
in En
| MEDLINE
| ID: mdl-33000246
ABSTRACT
Clinical application of doxorubicin (DOX) is hampered by its potential cardiotoxicity, however angiotensin receptor blockers could attenuate DOXinduced cardiomyopathy. The present study tested the hypothesis that simultaneous administration of valsartan (Val) with DOX could prevent DOXinduced myocardial injury by modulating myocardial NAD(P)H oxidase (NOX) expression in rats. Eightweekold male SpragueDawley rats were randomly divided into control (CON), DOX, and DOX+Val groups. After 10 weeks, surviving rats underwent echocardiography examination, myocardial mRNA and protein expression detection of NOX1, NOX2 and NOX4. H9C2 cells were used to perform in vitro experiments, reactive oxygen species (ROS) production and apoptosis were observed under the conditions of down or upregulation of NOX2 and NOX4 in DOX and DOX+Valtreated H9C2 cells. Cardiac function was significantly improved, pathological lesion and collagen volume fraction were significantly reduced in the DOX+Val group compared with the DOX group (all P<0.05). Myocardial protein and mRNA expression of NOX2 and NOX4 was significantly downregulated in DOX+Val group compared with in the DOX group (all P<0.05). In vitro, ROS production and apoptosis in DOXtreated H9C2 cells was significantly reduced by NOX2small interfering (si)RNA and NOX4siRNA, and significantly increased by overexpressing NOX2 and NOX4. To conclude, Val applied simultaneously with DOX could prevent DOXinduced myocardial injury and reduce oxidative stress by downregulating the myocardial expression of NOX2 and NOX4 in rats.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Doxorubicin
/
Cardiotoxicity
/
Valsartan
/
NADPH Oxidase 2
/
NADPH Oxidase 4
Limits:
Animals
Language:
En
Journal:
Mol Med Rep
Year:
2020
Document type:
Article