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- W2742477802 abstract "The pathogenesis of cardiac hypertrophy is tightly associated with mitochondrial dysfunction. Disequilibrium of mitochondrial dynamic is one of the main drivers in the pathological processes during development of various cardiac diseases. However, the effect of mitochondrial dynamics on cardiac hypertrophy remains largely unclear. MicroRNAs (miRNAs) are small noncoding RNAs that can switch off expression of many genes. Mitochondrial anchored protein ligase (MAPL) is a small ubiquitin-like modifier (SUMO) E3 ligase, which is an important contributor in mitochondrial fission process. In this study, we found that hypertrophic agonist phenylephrine (PE) enhanced the expression of MAPL and promoted mitochondrial fission, while it decreased the expression of mitochondrial fusion protein2 (Mfn2) in hypertrophic cardiomyocytes. Silencing expression of MAPL by siRNA attenuated PE-induced depletion of Mfn2 and increase of mitochondrial fission as well as hypertrophic response in cultured primary cardiomyocytes. MiR-485-5p is screened as a candidate inhibitor of MAPL. Overexpression of miR-485-5p blocked mitochondrial fission and hypertrophy induced by PE through inhibiting MAPL expression and increasing the level of Mfn2 in cultured primary cardiomyocytes. In mice model of cardiac hypertrophy induced by PE, the administration of miR-485-5p agomir significantly decreased the PE induced increase in the expression of MAPL and hypertrophic markers (ANP and β-MHC) along with protection of cardiac structure and function. Together, this study exhibits a novel signaling axis composed of miR-485-5p/MAPL/Mfn2, which regulates mitochondrial machinery and cardiac hypertrophy." @default.
- W2742477802 created "2017-08-17" @default.
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- W2742477802 date "2017-11-01" @default.
- W2742477802 modified "2023-10-15" @default.
- W2742477802 title "MiR-485-5p modulates mitochondrial fission through targeting mitochondrial anchored protein ligase in cardiac hypertrophy" @default.
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- W2742477802 doi "https://doi.org/10.1016/j.bbadis.2017.07.034" @default.
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