(Pro)renin receptor-mediated myocardial injury, apoptosis, and inflammatory response in rats with diabetic cardiomyopathy

Excessive activation of the renin-angiotensin system (RAS) in diabetic cardiomyopathy (DCM) provokes a series of structural and functional abnormalities, and causes ventricular remodeling and heart failure in diabetes. (Pro)renin receptor (PRR) is a component of the RAS and has been reported to be u...

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Published in:	The Journal of biological chemistry Vol. 294; no. 20; pp. 8218 - 8226
Main Authors:	Dong, Xuefei, Yu, Shiran, Wang, Ying, Yang, Min, Xiong, Jie, Hei, Naier, Dong, Bo, Su, Qing, Chen, Jing
Format:	Journal Article
Language:	English
Published:	United States Elsevier Inc 17-05-2019 American Society for Biochemistry and Molecular Biology
Subjects:	(pro)renin receptor Animals Apoptosis cardiomyopathy Collagen Type I - biosynthesis diabetes Diabetes Mellitus, Experimental - metabolism Diabetes Mellitus, Experimental - pathology Diabetic Cardiomyopathies - metabolism Diabetic Cardiomyopathies - pathology Fibronectins - biosynthesis Fibrosis inflammation Inflammation - metabolism Inflammation - pathology Male MAP Kinase Signaling System Molecular Bases of Disease myocardial injury Myocardium - metabolism Myocardium - pathology oxidative stress Rats Rats, Wistar Reactive Oxygen Species - metabolism Receptors, Cell Surface - metabolism Renin-Angiotensin System myocardial injury inflammation apoptosis cardiomyopathy diabetes (pro)renin receptor oxidative stress
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Summary:	Excessive activation of the renin-angiotensin system (RAS) in diabetic cardiomyopathy (DCM) provokes a series of structural and functional abnormalities, and causes ventricular remodeling and heart failure in diabetes. (Pro)renin receptor (PRR) is a component of the RAS and has been reported to be up-regulated in some cardiovascular diseases. Furthermore, PRR blockade in some cardiovascular diseases, such as myocardial infarction and hypertension, has been demonstrated to reverse their pathogenesis. However, there have been few studies about the function of PRR in the pathogenesis of DCM. In this study, we hypothesized that PRR is involved in the pathogenesis of DCM and mediates myocardial injury in DCM. To explore the role of PRR in DCM, we evaluated the effects of PRR overexpression and knockdown on the DCM phenotype in vivo and in vitro. The results show that PRR overexpression exacerbates myocardial injury and the inflammatory response in rats with DCM. Conversely, PRR knockdown alleviates myocardial fibrosis, apoptosis, and the inflammatory response, reversing the cardiac dysfunction in rats with DCM. In cell experiments, PRR overexpression also up-regulated the protein expression of collagen I and fibronectin, aggravated the inflammatory response, and increased the production of reactive oxygen species, whereas PRR knockdown had the opposite effect. Thus, PRR mediates myocardial injury, apoptosis, and the inflammatory response, likely through a PRR/extracellular signal-regulated kinase/reactive oxygen species pathway.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 These authors contributed equally to the results of this work. Edited by Jeffrey E. Pessin
ISSN:	0021-9258 1083-351X
DOI:	10.1074/jbc.RA119.007648