title: miR-210 has an antiapoptotic effect in pulmonary artery smooth muscle cells during hypoxia.
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.
authors.affiliation: College of Life Sciences, Shenzhen University, Shenzhen 518060 China. dmgou@szu.edu.cn
authors.forename: Deming
authors.initials: D
authors.lastname: Gou
authors.forename: Ramaswamy
authors.initials: R
authors.lastname: Ramchandran
authors.forename: Xiao
authors.initials: X
authors.lastname: Peng
authors.forename: Lijun
authors.initials: L
authors.lastname: Yao
authors.forename: Kang
authors.initials: K
authors.lastname: Kang
authors.forename: Joy
authors.initials: J
authors.lastname: Sarkar
authors.forename: Zhixin
authors.initials: Z
authors.lastname: Wang
authors.forename: Guofei
authors.initials: G
authors.lastname: Zhou
authors.forename: Goufei
authors.initials: G
authors.lastname: Zhou
authors.forename: J Usha
authors.initials: JU
authors.lastname: Raj
mesh_terms: D000818:Animals; D017209:Apoptosis / Q000235:genetics*; D002908:Chronic Disease; D004195:Disease Models, Animal; D015536:Down-Regulation / Q000235:genetics; D050699:E2F3 Transcription Factor / Q000235:genetics / Q000378:metabolism; D065627:Familial Primary Pulmonary Hypertension; D006801:Humans; D006976:Hypertension, Pulmonary / Q000235:genetics* / Q000473:pathology; D000860:Hypoxia / Q000235:genetics* / Q000473:pathology; D051795:Hypoxia-Inducible Factor 1, alpha Subunit / Q000235:genetics / Q000378:metabolism; D051379:Mice; D035683:MicroRNAs / Q000235:genetics*; D032389:Myocytes, Smooth Muscle / Q000166:cytology / Q000502:physiology*; D010641:Phenotype; D061251:Primary Cell Culture; D011651:Pulmonary Artery / Q000166:cytology / Q000502:physiology; D034741:RNA, Small Interfering / Q000235:genetics
chemical_list: D050699:E2F3 Transcription Factor; C098319:E2F3 protein, human; C497442:HIF1A protein, human; D051795:Hypoxia-Inducible Factor 1, alpha Subunit; C543800:MIRN210 microRNA, human; C549325:MIRN210 microRNA, mouse; D035683:MicroRNAs; D034741:RNA, Small Interfering