Document Detail

The role of matrix metalloproteinases -9 and -2 in development of neonatal chronic lung disease.
MedLine Citation:
PMID:  15244229     Owner:  NLM     Status:  MEDLINE    
AIM: Matrix metalloproteinases (MMPs) -9 and -2 degrade type-IV collagen, a major constituent of lung basement membrane, and may have a role in the pathogenesis of neonatal chronic lung disease (CLD). We determined factors influencing MMP levels in neonatal bronchoalveolar lavage (BAL) fluid to establish whether an imbalance between MMP and its inhibitor could be implicated in CLD. METHODS: We measured MMP-9 and -2 and tissue inhibitor of metalloproteinase-1 (TIMP-1) levels in 316 BAL fluid samples from 121 babies of gestational ages 23 to 42 wk over the first 14 d of life to determine effects of gestation and postnatal age. Median MMP-9, -2, TIMP-1 and MMP-9/TIMP-1 ratio in BAL were further studied in a subgroup of 85 babies <33 wk gestation to determine their ability to predict CLD and to establish effects of antenatal corticosteroid therapy (ANCS). RESULTS: MMP-9, -2 and TIMP levels did not vary with postnatal age over the first week. Median MMP-9 levels and MMP-9/TIMP-1 ratio increased with decreasing gestation in preterm babies. The MMP-9/TIMP-1 ratio was higher in babies who developed CLD, implying a proteinase/antiproteinase imbalance, but this association disappeared when controlled for gestational age. ANCS had no effect on BAL fluid MMP or TIMP levels. CONCLUSION: MMPs may have a role in the development of lung injury and fibrosis, but estimating their levels in the first week of life does not help with prediction of CLD.
D G Sweet; A E Curley; E Chesshyre; J Pizzotti; M S Wilbourn; H L Halliday; J A Warner
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta paediatrica (Oslo, Norway : 1992)     Volume:  93     ISSN:  0803-5253     ISO Abbreviation:  Acta Paediatr.     Publication Date:  2004 Jun 
Date Detail:
Created Date:  2004-07-12     Completed Date:  2004-09-21     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9205968     Medline TA:  Acta Paediatr     Country:  Norway    
Other Details:
Languages:  eng     Pagination:  791-6     Citation Subset:  IM    
Department of Child Health, Queen's University of Belfast, Institute of Clinical Science, Belfast, Northern Ireland, UK.
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MeSH Terms
Bronchoalveolar Lavage Fluid / chemistry*
Chronic Disease
Gestational Age
Infant, Newborn
Infant, Premature
Matrix Metalloproteinase 2 / isolation & purification*
Matrix Metalloproteinase 9 / isolation & purification*
Prospective Studies
Respiratory Distress Syndrome, Newborn / etiology*
Tissue Inhibitor of Metalloproteinase-1 / isolation & purification*
Reg. No./Substance:
0/Tissue Inhibitor of Metalloproteinase-1; EC Metalloproteinase 2; EC Metalloproteinase 9

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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