A peroxynitrite decomposition catalyst prevents 60% O2-mediated rat chronic neonatal lung injury.

Free Radical Biology & Medicine
Azhar MasoodA K Tanswell

Abstract

Exposure of newborn rats to 60% O2 for 14days results in a chronic neonatal lung injury characterized by parenchymal thickening, impaired alveolarization, evidence of pulmonary hypertension, and pulmonary vascular pruning. The contribution of peroxynitrite to this injury was assessed by treating pups with a peroxynitrite decomposition catalyst, 5,10,15,20-tetrakis(4-sulfonatophenyl)porphyrinato iron(III) chloride (FeTPPS), at 30microg/g/day. Body and lung weights and postfixation lung volumes were all slightly, but significantly, reduced by exposure to 60% O2 and this was attenuated by a concurrent FeTPPS intervention. The FeTPPS intervention had no impact on increased neutrophil or macrophage influx into the lung, but attenuated 60% O2-induced reductions in the lung contents of vascular endothelial-derived growth factor, its receptor-2, and angiopoietin and increases in 8-isoprostane and preproendothelin-1. The 60% O2-induced parenchymal thickening and impairment of alveologenesis, as well as vascular pruning and peripheral vessel medial wall thickening, were attenuated by FeTPPS, despite a persistent inflammatory cell influx. Pups exposed to 60% O2 and treated with FeTPPS had enhanced alveolar formation relative to control pu...Continue Reading

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Citations

Jan 7, 2014·Antioxidants & Redox Signaling·Virender K Rehan, John S Torday
Dec 20, 2013·Antioxidants & Redox Signaling·Stephen Wedgwood, Robin H Steinhorn
Aug 15, 2015·Toxicological Sciences : an Official Journal of the Society of Toxicology·Binoy ShivannaBhagavatula Moorthy
Dec 1, 2012·Free Radical Biology & Medicine·Mobin JamalA Keith Tanswell
Dec 4, 2016·American Journal of Physiology. Lung Cellular and Molecular Physiology·Anastasiya MankouskiRobert P Jankov
Aug 10, 2018·American Journal of Physiology. Lung Cellular and Molecular Physiology·Robert P JankovAmish Jain
Jun 19, 2016·American Journal of Physiology. Lung Cellular and Molecular Physiology·Mong Tieng EeRobert P Jankov
Jul 3, 2015·American Journal of Physiology. Lung Cellular and Molecular Physiology·Azhar MasoodA Keith Tanswell
May 15, 2012·American Journal of Physiology. Lung Cellular and Molecular Physiology·A Charlotte P SewingRobert P Jankov
Dec 15, 2010·American Journal of Physiology. Lung Cellular and Molecular Physiology·Man YiA Keith Tanswell
Mar 5, 2013·American Journal of Physiology. Lung Cellular and Molecular Physiology·Jun LiA Keith Tanswell
Nov 12, 2013·American Journal of Physiology. Lung Cellular and Molecular Physiology·Alicia MadurgaRory E Morty

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