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First published online on December 10, 2007
Chest, doi:10.1378/chest.07-2116
A more recent version of this article appeared on May 1, 2008
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Is metalloproteinase-7 specific for idiopathic pulmonary fibrosis?

Jin Won Huh, MD; Dong Soon Kim, MD; Yeon-Mok Oh, MD; Tae Sun Shim, MD; Chae Man Lim, MD; Sang Do Lee, MD; Yunsuck Koh, MD; Woo Sung Kim, MD; Won Dong Kim, MD and Kyu Rae Kim, MD

From the Division of Pulmonary and Critical Care Medicine (Drs. Huh, D.S. Kim, Shim, Lim, Lee, Koh, W.S. Kim, W.D. Kim) and Pathology (Dr K.R. Kim), Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea

dskim{at}amc.seoul.kr

Abstract

BackgroundMatrix metalloproteinase (MMP)-7 was reported to be a key molecule in the pathogenesis of idiopathic pulmonary fibrosis (IPF) based on the result of microarray analysis and knockout mice. However, the role of MMP-7 has not been determined in other types of idiopathic interstitial pneumonia (IIP). The aim of this study is to investigate the role of MMP-7 in IIP by comparing its expression in UIP and cryptogenic organizing pneumonia (COP).

MethodsMMP and TIMP levels in bronchoalveolar lavage (BAL) fluid and their expression on lung tissues were compared between normal control (n=5) and the patients with IPF (n=6) and COP (n=11).

ResultsThere was no significant difference in BAL fluid MMP-7 level between UIP and COP, although it was higher in both diseases compared to normal control. Furthermore, the pattern and the degree of MMP-7 expression in lung tissues were also similar in both IPF and COP. Whereas MMP-2 level was higher in COP and MMP-9 was higher in IPF.

ConclusionMMP-7 seems to play an important role in the pathogenesis of not only IPF but also COP; therefore it may not be the key factor determining the prognosis or reversibility of IIPs.

Key Words: matrix metalloproteinase-7 • cryptogenic organizing pneumonia • idiopathic pulmonary fibrosis • BAL fluid • immunohistochemistry


Related Editorial

Matrix Metalloproteinase-7 Expression in Fibrosing Lung Disease: Restoring the Balance
Gregory P. Cosgrove and Roland M. du Bois
Chest 2008 133: 1058-1060. [Full Text] [PDF]



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G. P. Cosgrove and R. M. du Bois
Matrix Metalloproteinase-7 Expression in Fibrosing Lung Disease: Restoring the Balance
Chest, May 1, 2008; 133(5): 1058 - 1060.
[Full Text] [PDF]


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