Journal
METHODS
Volume 21, Issue 2, Pages 125-132Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/meth.2000.0983
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Methods to assess in vitro the role of plasminogen activation in enterobacterial degradation of extracellular matrices and their protein components as well as in penetration through basement membrane ave described. Development of these methods was initiated after the findings that enterobacterial surface structures (fimbriae and the Pla surface protease) function in plasminogen activation as Well as in laminin-and/or fibronectin-specific adhesion. Enterobacteria with these properties degrade radiolabeled laminin as well as metabolically labeled extracellular matrix from cultured endothelial or epithelial cells. Plasmin-coated bacteria also penetrate through the reconstituted basement membrane preparation Matrigel. The processes are dependent on plasminogen activation by the invasive bacteria. The results suggest a pathogenic similarity between enterobacteria and tumor cells in cellular metastasis through tissue barriers. (C) 2000 Academic Press.
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