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Regulation and function of miR-214 in pulmonary arterial hypertension

Lookup NU author(s): Dr Jenny Grant

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Abstract

Dysregulation of microRNAs (miRNAs) can contribute to the etiology of diseases, including pulmonary arterial hypertension (PAH). Here we investigated a potential role for the miR-214 stem loop miRNA and the closely linked miR-199a miRNAs in PAH. All 4 miRNAs were upregulated in the lung and right ventricle (RV) in mice and rats exposed to the Sugen (SU) 5416 hypoxia model of PAH. Further, expression of the miRNAs was increased in pulmonary artery smooth muscle cells exposed to transforming growth factor beta 1 but not BMP4. We then examined miR-214(-/-) mice exposed to the SU 5416 hypoxia model of PAH or normoxic conditions and littermate controls. There were no changes in RV systolic pressure or remodeling observed between the miR-214(-/-) and wild-type hypoxic groups. However, we observed a significant increase in RV hypertrophy (RVH) in hypoxic miR-214(-/-) male mice compared with controls. Further, we identified that the validated miR-214 target phosphatase and tensin homolog was upregulated in miR-214(-/-) mice. Thus, miR-214 stem loop loss leads to elevated RVH and may contribute to the heart failure associated with PAH.


Publication metadata

Author(s): Stevens HC, Deng L, Grant JS, Pinel K, Thomas M, Morrell NW, MacLean MR, Baker AH, Denby L

Publication type: Article

Publication status: Published

Journal: Pulmonary Circulation

Year: 2016

Volume: 6

Issue: 1

Pages: 109-117

Print publication date: 01/03/2016

Online publication date: 03/02/2016

Acceptance date: 17/11/2015

ISSN (print): 2045-8932

ISSN (electronic): 2045-8940

Publisher: University of Chicago Press

URL: http://dx.doi.org/10.1086/685079

DOI: 10.1086/685079


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