Epilysin (matrix metalloproteinase-28) contributes to airway epithelial cell survival

MMP28 is constitutively expressed by epithelial cells in many tissues, including the respiratory epithelium in the lung and keratinocytes in the skin. This constitutive expression suggests that MMP28 may serve a role in epithelial cell homeostasis. In an effort to determine its function in epithelia...

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Bibliographic Details
Published in:Respiratory research Vol. 12; no. 145; p. 144
Main Authors: Manicone, Anne M, Harju-Baker, Susanna, Johnston, Laura K, Chen, Ann J, Parks, William C
Format: Journal Article
Language:English
Published: England BioMed Central Ltd 31-10-2011
BioMed Central
BMC
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Summary:MMP28 is constitutively expressed by epithelial cells in many tissues, including the respiratory epithelium in the lung and keratinocytes in the skin. This constitutive expression suggests that MMP28 may serve a role in epithelial cell homeostasis. In an effort to determine its function in epithelial cell biology, we generated cell lines expressing wild-type or catalytically-inactive mutant MMP28 in two pulmonary epithelial cell lines, A549 and BEAS-2B. We observed that over-expression of MMP28 provided protection against apoptosis induced by either serum-deprivation or treatment with a protein kinase inhibitor, staurosporine. Furthermore, we observed increased caspase-3/7 activity in influenza-infected lungs from Mmp28-/- mice compared to wild-type mice, and this activity localized to the airway epithelium but was not associated with a change in viral load. Thus, we have identified a novel role of MMP28 in promoting epithelial cell survival in the lung.
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ISSN:1465-993X
1465-9921
1465-993X
1465-9921
DOI:10.1186/1465-9921-12-144