Disturbed Flow Increases UBE2C (Ubiquitin E2 Ligase C) via Loss of miR-483-3p, Inducing Aortic Valve Calcification by the pVHL (von Hippel-Lindau Protein) and HIF-1α (Hypoxia-Inducible Factor-1α) Pathway in Endothelial Cells
| Autor: | Hanjoong Jo, Sandeep Kumar, Ajit P. Yoganathan, W. Robert Taylor, Nicolas Villa-Roel, Joan Fernandez Esmerats, Tausif Salim, Robert M. Nerem, Lina Gu, Michael Ohh |
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| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Mustard Compounds Swine Oligonucleotides Inflammation Monocytes Article 03 medical and health sciences 0302 clinical medicine Organ Culture Techniques Downregulation and upregulation Ubiquitin medicine Cell Adhesion Animals Humans RNA Small Interfering Cells Cultured biology Phenylpropionates Chemistry Ubiquitination Calcinosis Endothelial Cells Aortic Valve Stenosis medicine.disease Hypoxia-Inducible Factor 1 alpha Subunit In vitro Cell biology MicroRNAs 030104 developmental biology Hypoxia-inducible factors Von Hippel-Lindau Tumor Suppressor Protein 030220 oncology & carcinogenesis Aortic Valve Cell Transdifferentiation Hemorheology Ubiquitin-Conjugating Enzymes biology.protein Female Stress Mechanical Aortic valve calcification medicine.symptom Cardiology and Cardiovascular Medicine Rheology Protein Processing Post-Translational Immunostaining Calcification |
| Zdroj: | Arteriosclerosis, thrombosis, and vascular biology. 39(3) |
| ISSN: | 1524-4636 |
| Popis: | Objective— Calcific aortic valve (AV) disease, characterized by AV sclerosis and calcification, is a major cause of death in the aging population; however, there are no effective medical therapies other than valve replacement. AV calcification preferentially occurs on the fibrosa side, exposed to disturbed flow (d-flow), whereas the ventricularis side exposed to predominantly stable flow remains protected by unclear mechanisms. Here, we tested the role of novel flow-sensitive UBE2C (ubiquitin E2 ligase C) and microRNA-483-3p (miR-483) in flow-dependent AV endothelial function and AV calcification. Approach and Results— Human AV endothelial cells and fresh porcine AV leaflets were exposed to stable flow or d-flow. We found that UBE2C was upregulated by d-flow in human AV endothelial cells in the miR-483–dependent manner. UBE2C mediated OS-induced endothelial inflammation and endothelial-mesenchymal transition by increasing the HIF-1α (hypoxia-inducible factor-1α) level. UBE2C increased HIF-1α by ubiquitinating and degrading its upstream regulator pVHL (von Hippel-Lindau protein). These in vitro findings were corroborated by immunostaining studies using diseased human AV leaflets. In addition, we found that reduction of miR-483 by d-flow led to increased UBE2C expression in human AV endothelial cells. The miR-483 mimic protected against endothelial inflammation and endothelial-mesenchymal transition in human AV endothelial cells and calcification of porcine AV leaflets by downregulating UBE2C. Moreover, treatment with the HIF-1α inhibitor (PX478) significantly reduced porcine AV calcification in static and d-flow conditions. Conclusions— These results suggest that miR-483 and UBE2C and pVHL are novel flow-sensitive anti- and pro-calcific AV disease molecules, respectively, that regulate the HIF-1α pathway in AV. The miR-483 mimic and HIF-1α pathway inhibitors may serve as potential therapeutics of calcific AV disease. |
| Databáze: | OpenAIRE |
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