Document Detail

Production and activation of matrix metalloproteinase 7 (matrilysin 1) in the lungs of patients with idiopathic pulmonary fibrosis.
MedLine Citation:
PMID:  20670133     Owner:  NLM     Status:  MEDLINE    
CONTEXT: Idiopathic pulmonary fibrosis (IPF) is characterized by diffuse interstitial inflammation and fibroblast proliferation with accelerated remodeling of extracellular matrix, which result in irreversible destruction of the lung's architecture. OBJECTIVE: To elucidate the production levels, tissue localization, and activation of matrix metalloproteinase 7 (MMP-7) in the lungs of patients with IPF. DESIGN: Bronchoalveolar lavage analysis was performed in 17 IPF patients and 6 healthy volunteers. Levels of MMP-7 in blood were assayed in 23 IPF patients and 20 controls. Histologic and immunohistochemical analyses were performed on paraffin sections of the lung tissues from patients with IPF, interstitial pneumonia associated with rheumatoid arthritis, or nonspecific interstitial pneumonia. RESULTS: The proMMP-7 levels in bronchoalveolar lavage fluids from IPF patients were significantly higher than those from healthy controls, although there was no difference in the serum levels between the 2 groups. By immunohistochemistry, proMMP-7 was localized mainly to the hyperplastic alveolar and metaplastic bronchiolar epithelial cells in the lung tissues from IPF patients. Active MMP-7 was immunolocalized on alveolar macrophages and hyperplastic epithelial cells, which were also immunostained with antibody against CD151, a molecule associated with activation of proMMP-7. Immunoblot analysis indicated the overproduction of proMMP-7 together with a small amount of active MMP-7 in bronchoalveolar lavage fluids from IPF patients. The MMP-7 activity was detected in a cross-linked carboxymethylated transferrin film assay. CONCLUSIONS: proMMP-7 is excessively produced by hyperplastic alveolar and metaplastic bronchiolar epithelial cells and activated locally in the lungs of IPF patients, suggesting that MMP-7 may contribute to the pathology of IPF.
Seitaro Fujishima; Takayuki Shiomi; Shuji Yamashita; Yurika Yogo; Yasushi Nakano; Takashi Inoue; Morio Nakamura; Sadatomo Tasaka; Naoki Hasegawa; Naoki Aikawa; Akitoshi Ishizaka; Yasunori Okada
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Archives of pathology & laboratory medicine     Volume:  134     ISSN:  1543-2165     ISO Abbreviation:  Arch. Pathol. Lab. Med.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-07-30     Completed Date:  2010-08-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7607091     Medline TA:  Arch Pathol Lab Med     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1136-42     Citation Subset:  AIM; IM    
Department of Emergency and Critical Care Medicine, School of Medicine, Keio University, Shinjuku-ku, Tokyo, Japan.
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MeSH Terms
Biological Markers / metabolism
Bronchioles / enzymology,  pathology
Bronchoalveolar Lavage
Idiopathic Pulmonary Fibrosis / blood,  enzymology*,  pathology
Lung / enzymology*,  pathology
Macrophages, Alveolar / enzymology,  pathology
Matrix Metalloproteinase 7 / metabolism*
Middle Aged
Respiratory Mucosa / enzymology,  pathology
Reg. No./Substance:
0/Biological Markers; EC protein, human; EC Metalloproteinase 7

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