MiR-210 Has an Antiapoptotic Effect in Pulmonary Artery Smooth Muscle Cells During Hypoxia

Overview

Journal Am J Physiol Lung Cell Mol Physiol

Publisher American Physiological Society

Specialties Cell Biology
Molecular Biology
Physiology
Pulmonary Medicine

Date 2012 Aug 14

PMID 22886504

Citations 72

Authors

Deming Gou

Ramaswamy Ramchandran

Xiao Peng

Lijun Yao

Kang Kang

Joy Sarkar

Zhixin Wang

Guofei Zhou

Goufei Zhou

J Usha Raj

Affiliations

Soon will be listed here.

Abstract

MicroRNAs (miRNAs) were recently reported to play an important role in the pathogenesis of pulmonary arterial hypertension (PAH), but it is not clear which miRNAs are important or what pathways are involved in the process. Because hypoxia is an important stimulus for human pulmonary artery smooth muscle cell (HPASMC) proliferation and PAH, we performed miRNA microarray assays in hypoxia-treated and control HPASMC. We found that miR-210 is the predominant miRNA induced by hypoxia in HPASMC. Induction of miR-210 was also observed in whole lungs of mice with chronic hypoxia-induced PAH. We found that transcriptional induction of miR-210 in HPASMC is hypoxia-inducible factor-1α dependent. Inhibition of miR-210 in HPASMC caused a significant decrease in cell number due to increased apoptosis. We found that miR-210 appears to mediate its antiapoptotic effects via the regulation of transcription factor E2F3, a direct target of miR-210. Our results have identified miR-210 as a hypoxia-inducible miRNA both in vitro and in vivo, which inhibits pulmonary vascular smooth muscle cell apoptosis in hypoxia by specifically repressing E2F3 expression.

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