MiR-590-5p inhibits pathological hypertrophy mediated heart failure by targeting RTN4

Heart failure (HF) is a rising epidemic and public health burden in modern society. It is of great need to find new biomarkers to ensure a timely diagnosis and to improve treatment and prognosis of the disease. The mouse model of HF was established by thoracic aortic constriction. Color Doppler ultr...

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Bibliographic Details
Published in:	Journal of molecular histology 2021-10, Vol.52 (5), p.955-964
Main Authors:	Fan, Ping, Zhang, Likun, Cheng, Tianyu, Wang, Jing, Zhou, Junyun, Zhao, Li, Hua, Cuie, Xia, Quan
Format:	Article
Language:	eng
Subjects:	3' Untranslated regions Angiotensin II Animals Aorta Apoptosis Apoptosis - genetics Base Sequence Biomarkers - metabolism Biomedical and Life Sciences Biomedicine Cardiomegaly - complications Cardiomegaly - genetics Cardiomegaly - pathology Cardiomyocytes Cell Biology Cell Line Congestive heart failure Developmental Biology Disease Models, Animal Doppler effect Down-Regulation - genetics Gene expression Heart failure Heart Failure - complications Heart Failure - genetics Hypertrophy Life Sciences Mice Mice, Inbred C57BL MicroRNAs - genetics MicroRNAs - metabolism Myocardium Myocytes Nogo Proteins - genetics Nogo Proteins - metabolism Original Paper Phenotypes Protein Binding Public health Thorax Ventricle
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Summary:	Heart failure (HF) is a rising epidemic and public health burden in modern society. It is of great need to find new biomarkers to ensure a timely diagnosis and to improve treatment and prognosis of the disease. The mouse model of HF was established by thoracic aortic constriction. Color Doppler ultrasound was performed to detect left ventricular end-diastolic diameter. Hematoxylin and eosin staining was conducted to observe the pathological changes of mouse myocardium. The RT-qPCR analysis was performed to detect miR-590-5p and RTN4 expression levels. Western blot was conducted to detect protein levels of the indicated genes. We found that the expression of miR-590-5p was downregulated in cardiac tissues of HF mice. Injection of AAV-miR-590-5p attenuated myocardium hypertrophy and myocyte apoptosis. Additionally, miR-590-5p overexpression promoted viability, inhibited apoptosis, and decreased ANF, BNP and beta-MHC protein levels in H9c2 cell. Mechanistically, miR-590-5p binds to RTN4 3′‐untranslated region, as predicted by starBase online database and evidenced by luciferase reporter assay. Furthermore, miR-590-5p negatively regulates RTN4 mRNA expression and suppresses its translation. The final rescue experiments revealed that miR-590-5p modulated cardiomyocyte phenotypes by binding to RTN4. In conclusion, miR-590-5p modulates myocardium hypertrophy and myocyte apoptosis in HF by downregulating RTN4.
ISSN:	1567-2379 1567-2387