Abstract
Calcification of aortic valves leads to aortic stenosis mainly in elderly individuals, but the underlying molecular mechanisms are still not understood. Here, we studied microRNA (miR, miRNA) expression and function in healthy and stenotic human aortic valves. We identified miR-21, miR-24, and miR-143 to be highly upregulated in stenotic aortic valves. Using luciferase reporter systems, we found direct binding of miR-143 to the 3′UTR region of the matrix gla protein (MGP), which in turn is a key factor to sustain homeostasis in aortic valves. In subsequent experiments, we demonstrated a therapeutic potential of miRNA regulation during calcification in cardiac valvular interstitial cells. Collectively, our data provide evidence that deregulated miR expression contributes to the development of stenotic valve disease and thus form novel therapeutic opportunities of this severe cardiovascular disease.
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Abbreviations
- miRNA, miR:
-
microRNA
- AS:
-
Aortic stenosis
- AVIC:
-
Aortic valve interstitial cells
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Acknowledgments
We thank Robert Ramm (Hannover Medical School) for establishment of porcine valve interstitial cell isolation. Da-Hee Park acknowledges support from IFB-Tx and Hannover Biomedical Research School (Strucmed program) at Hannover Medical School.
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The authors disclose support from DFG (KFO311 to TT) and EraNet Expert (to TT). TT and JF have filed patents in the field of cardiovascular miRNA diagnostics and therapeutics. TT is founder of Cardior Pharmaceuticals GmbH.
Human Subjects/Informed Consent Statement
All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all patients for being included in the study. Aortic valve samples were obtained from patients undergoing aortic valve replacement in the University Hospital Würzburg approved by ethics committee (study number 111/03 from 09/2003).
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Associate Editor Adrian Chester oversaw the review of this article
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Fiedler, J., Park, DH., Hobuß, L. et al. Identification of miR-143 as a Major Contributor for Human Stenotic Aortic Valve Disease. J. of Cardiovasc. Trans. Res. 12, 447–458 (2019). https://doi.org/10.1007/s12265-019-09880-7
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DOI: https://doi.org/10.1007/s12265-019-09880-7