Journal
INTERNATIONAL JOURNAL OF EXPERIMENTAL PATHOLOGY
Volume 88, Issue 6, Pages 437-443Publisher
WILEY
DOI: 10.1111/j.1365-2613.2007.00554.x
Keywords
Angiostrongylus cantonensis; extracellular matrix; fibronectin; granuloma; inhibitors of matrix metalloproteinases; matrix metalloproteinases
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Pulmonary granuloma formation and fibrosis were experimentally induced in Sprague-Dawley strain rats by Angiostrongylus cantonensis. Increased protein levels of matrix metalloproteinase (MMP)-2, -9, -13 and the imbalance between these enzymes and metalloproteinase inhibitors, tissue inhibitors of MMPs (TIMP-1 and -2), occur during granulomatous fibrosis. Activation of proteolytic enzymes (MMP-2, -9 and -13) and fibronectin degradation occur simultaneously. Furthermore, the present study demonstrated that fibronectin avidly binds MMP-2, -9 or -13. Immunohistochemical observations also showed the localization of MMP-13, TIMP-1 and -2 within the infiltrating leucocytes. These results suggest that MMP-2, -9 and -13 may participate in the fibronectin degradation of A. cantonensis-induced granulomatous fibrosis.
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