Document Detail

Role of reactive oxygen species in chronic hypoxia-induced pulmonary hypertension and vascular remodeling.
MedLine Citation:
PMID:  18269191     Owner:  NLM     Status:  MEDLINE    
Pulmonary hypertension is a life-threatening disease process that affects adults and children. Pediatric patients with lung diseases that can be complicated by alveolar hypoxia, such as bronchopulmonary dysplasia (BPD), are at risk for developing pulmonary hypertension, which leads to right heart failure and greatly increases morbidity and mortality. We review the evidence that reactive oxygen species (ROS) are generated by pulmonary vascular wall cells in response to a hypoxic exposure, and that this response contributes to chronic hypoxic pulmonary hypertension. We summarize the accumulating data implicating NADPH oxidase as a major source of O2 responsible for vascular remodeling and hypertension. We also consider the effects of chronic hypoxia on the clearance of O2 by superoxide dismutases, specifically extracellular superoxide dismutase, which is highly expressed in the pulmonary artery. We review the role of the activated vascular adventitial fibroblast in the generation of ROS and in the pathogenesis of vascular remodeling, and provide a rationale to consider the role of the activated fibroblast and ROS in hypoxic pulmonary hypertension using a clinically relevant bovine model of neonatal chronic hypoxic pulmonary hypertension.
Eva Nozik-Grayck; Kurt R Stenmark
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Advances in experimental medicine and biology     Volume:  618     ISSN:  0065-2598     ISO Abbreviation:  Adv. Exp. Med. Biol.     Publication Date:  2007  
Date Detail:
Created Date:  2008-02-13     Completed Date:  2008-03-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0121103     Medline TA:  Adv Exp Med Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  101-12     Citation Subset:  IM    
Department of Pediatrics and Developmental Lung Biology Laboratory, University of Colorado at Denver and Health Science Center, Denver, Colorado, USA.
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MeSH Terms
Anoxia / complications*
Hypertension, Pulmonary / etiology*
Pulmonary Artery / pathology
Reactive Oxygen Species / metabolism*
Grant Support
Reg. No./Substance:
0/Reactive Oxygen Species

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