期刊
NAUNYN-SCHMIEDEBERGS ARCHIVES OF PHARMACOLOGY
卷 393, 期 12, 页码 2495-2506出版社
SPRINGER
DOI: 10.1007/s00210-020-01847-9
关键词
Cardiomyocyte hypertrophy; Tincr; miR-31-5p; PKCe
资金
- National Natural Science Foundation of China [81970204]
- National Thirteenth Five-Year Project [2016YFC0903100]
- Science research foundation of Shanxi Province Health and Family Planning Commission [2017038, 2018039]
- Central Leading Local Science and Technology Development Special Fund Project [YDZX20191400004850]
- Science research foundation of Shanxi Science and Technology Department [201801D221422]
- 6 Ph.D Programs Foundation of the First Clinical Medical College of Shanxi Medical University [YB161704]
- Key Laboratory of Cellular Physiology (ShanxiMedical University), Ministry of Education
Cardiomyocyte hypertrophy is a fatal factor in heart disease resulting in heart failure and even mortality. Although many studies have been focusing on the pathogenesis of cardiomyocyte hypertrophy, the exact molecular mechanisms are still unexclusive. In this study, we first found that the expression level of lncRNA Tincr was significantly decreased in the myocardial tissues of TAC mouse models of cardiomyocyte hypertrophy, and this result was further confirmed in H9C2 cells, a widely used rat myoblast cell lines. More intriguingly, we demonstrated that the aberration of Tincr is essential to the pathogenesis of cardiomyocyte hypertrophy, indicated by the re-induction of Tincr improving the heart functions of hypertrophic mice. In mechanism, we identified miR-31-5p as a direct target of Tincr using a widely used online bioinformatics tool StarBase, and this result was further experimentally validated using dual-luciferase reporter assay and real-time PCR. Also, we identifiedPRKCEas a direct target of miR-31-5p, and loss function of miR-31-5p significantly blocks the positive regulatory effect of Tincr onPRKCEexpression in H9C2 cells. The knockdown of Tincr resulted in increased cardiomyocyte size, and, however, inhibition of miR-31-5p or overexpression ofPRKCEsignificantly reversed the increased cardiomyocyte size. Taken together, our study showed that a novel Tincr-miR-31-5p axis targetingPRKCEwas involved in cardiomyocyte hypertrophy, indicating that it may provide potential therapy in cardiomyocyte hypertrophy.
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