Document Detail

Expression of eNOS in the lungs of neonates with pulmonary hypertension.
MedLine Citation:
PMID:  21111729     Owner:  NLM     Status:  In-Process    
BACKGROUND: Neonatal hypoxemic respiratory failure (NHRF) is usually associated with reversible persistent pulmonary hypertension (PPHN). Congenital diaphragmatic hernia (CDH), a cause of refractory NHRF, is associated with irreversible pulmonary hypertension. Nitric oxide (NO) generated in the pulmonary vascular endothelium by endothelial nitric oxide synthase (eNOS) plays a pivotal role in perinatal circulatory adaptation.
OBJECTIVE: To compare the expression of eNOS using IHC in postmortem lung tissue from newborns diagnosed clinically with PPHN and CDH.
DESIGN/METHODS: Formalin-fixed lung tissue from infants who died following treatment for PPHN (n=12) or CDH (n=8) and age and gender matched controls who died from non-respiratory causes (Control, n=14) was evaluated for expression and staining intensity (1-4 scale) of eNOS using IHC.
RESULTS: Mean gestational and postnatal age was comparable across groups. Histological evidence of chronic lung disease, pulmonary hypoplasia and pulmonary hypertension were seen more frequently in CDH compared to PPHN and control infants. eNOS expression was increased in arteriolar media of PPHN infants compared to Controls (p=0.027). CDH infants had increased intensity of staining for eNOS in the arteriolar endothelium (p=0.022) compared to control and PPHN infants and in the alveolar lining (p=0.002) compared to Controls.
CONCLUSIONS: Upregulation of eNOS was seen both in infants with CDH and PPHN but was more marked in infants with CDH. These findings may have implications for understanding disease pathophysiology in cases with fatal outcome and development of novel therapies for neonatal pulmonary hypertension.
Beena G Sood; Susan Wykes; Marina Landa; Lilia De Jesus; Raja Rabah
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-11-24
Journal Detail:
Title:  Experimental and molecular pathology     Volume:  90     ISSN:  1096-0945     ISO Abbreviation:  Exp. Mol. Pathol.     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-01-03     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370711     Medline TA:  Exp Mol Pathol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  9-12     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Division of Neonatal-Perinatal Medicine, Children's Hospital of Michigan and Wayne State University, Detroit, MI 48201, USA.
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