Related Experiment Videos
Matrix metalloproteinase-9 in lung remodeling.
Jeffrey J Atkinson1, Robert M Senior
1Pulmonary and Critical Care Medicine, Department of Medicine, Washington University School of Medicine at Barnes-Jewish Hospital, St. Louis, Missouri 63110, USA.
American Journal of Respiratory Cell and Molecular Biology
|December 24, 2002
Summary
Matrix metalloproteinase-9 (MMP-9) is elevated in lung diseases like asthma, IPF, and COPD. Its exact role in lung remodeling and disease progression requires further investigation for potential therapeutic targeting.
Area of Science:
- Pulmonary Medicine
- Biochemistry
- Cell Biology
Background:
- Matrix metalloproteinase-9 (MMP-9) is significantly upregulated in the lungs of patients with asthma, idiopathic pulmonary fibrosis (IPF), and chronic obstructive pulmonary disease (COPD) compared to healthy individuals.
- While MMP-9 is produced by various lung cells, its specific contribution to lung remodeling versus its role in inflammatory and reparative processes remains unclear.
- MMP-9 has diverse functions, including the degradation of structural proteins and antiproteases, and can modulate cellular activities through cytokine and growth factor regulation.
Purpose of the Study:
- To review the current understanding of MMP-9's role in human asthma, IPF, and COPD.
- To explore MMP-9's involvement in both human diseases and relevant animal models.
- To highlight the importance of determining MMP-9's function for future therapeutic interventions.
Main Methods:
- Literature review of studies investigating MMP-9 in human lung diseases and animal models.
- Analysis of existing data on MMP-9 production by intrinsic lung cells and inflammatory cells.
- Synthesis of information regarding MMP-9's enzymatic and regulatory functions in the lung microenvironment.
Main Results:
- MMP-9 is abundant in several lung diseases, suggesting a significant role beyond its low levels in healthy lungs.
- Multiple cell types contribute to MMP-9 production, indicating varied functions depending on the microenvironment.
- MMP-9's dual capacity to degrade matrix components and regulate cellular signaling underscores its complex involvement in lung pathology.
Conclusions:
- Further research is crucial to elucidate whether MMP-9 is a driver of lung remodeling or a component of the body's response to lung injury.
- Understanding MMP-9's precise role is essential for the development of targeted therapies, as specific inhibitors are nearing clinical application.
- This review consolidates current knowledge on MMP-9 in major human lung diseases, paving the way for future clinical translation.