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Hyperoxia causes miR-34a-mediated injury via angiopoietin-1 in neonatal lungs.


ABSTRACT: Hyperoxia-induced acute lung injury (HALI) is a key contributor to the pathogenesis of bronchopulmonary dysplasia (BPD) in neonates, for which no specific preventive or therapeutic agent is available. Here we show that lung micro-RNA (miR)-34a levels are significantly increased in lungs of neonatal mice exposed to hyperoxia. Deletion or inhibition of miR-34a improves the pulmonary phenotype and BPD-associated pulmonary arterial hypertension (PAH) in BPD mouse models, which, conversely, is worsened by miR-34a overexpression. Administration of angiopoietin-1, which is one of the downstream targets of miR34a, is able to ameliorate the BPD pulmonary and PAH phenotypes. Using three independent cohorts of human samples, we show that miR-34a expression is increased in type 2 alveolar epithelial cells in neonates with respiratory distress syndrome and BPD. Our data suggest that pharmacologic miR-34a inhibition may be a therapeutic option to prevent or ameliorate HALI/BPD in neonates.

SUBMITTER: Syed M 

PROVIDER: S-EPMC5660088 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature

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Hyperoxia causes miR-34a-mediated injury via angiopoietin-1 in neonatal lungs.

Syed Mansoor M   Das Pragnya P   Pawar Aishwarya A   Aghai Zubair H ZH   Kaskinen Anu A   Zhuang Zhen W ZW   Ambalavanan Namasivayam N   Pryhuber Gloria G   Andersson Sture S   Bhandari Vineet V  

Nature communications 20171027 1


Hyperoxia-induced acute lung injury (HALI) is a key contributor to the pathogenesis of bronchopulmonary dysplasia (BPD) in neonates, for which no specific preventive or therapeutic agent is available. Here we show that lung micro-RNA (miR)-34a levels are significantly increased in lungs of neonatal mice exposed to hyperoxia. Deletion or inhibition of miR-34a improves the pulmonary phenotype and BPD-associated pulmonary arterial hypertension (PAH) in BPD mouse models, which, conversely, is worsen  ...[more]

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2022-08-18 | MSV000090157 | MassIVE