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• W2076112401 abstract "Plasminogen activators (PAs), a family of serine proteases, and their inhibitors (PAIs) are important in fibrinolysis, wound healing and tissue remodelling. Previous studies revealed differences in the localization of PA activity between healthy and diseased gingival tissues, suggesting that PAs and PAIs could play a part in periodontal homeostasis and disease. PAs and PAIs are synthesized by most of the cell types making up the periodontium and can be identified in gingival crevicular fluid (GCF). These studies sought to characterize the molecular species of PAs and their inhibitors in GCF collected from clinically healthy sites. PA enzymatic activity in GCF samples demonstrated by fibrin zymography revealed the presence of only tissue-type PA (tPA) activity. No urokinase-type PA (uPA) enzymatic activity was detected. tPA enzymatic activity appeared predominantly as an uncomplexed 70-kDa species, although some samples contained enzyme-inhibitor complexes. Quantitation of total tPA by enzyme immunoassay showed a mean concentration of 1.6ng/μl. Analysis of GCF samples for uPA by immunoblotting and enzyme immunoassay disclosed the presence of small amounts of uPA (0.2 ng/μl), which were present predominantly in activator-inhibitor complexes. Immunoblotting showed specific PAI-2 immunoreactivity bands in high molecular-weight complexes and low molecular-weight degradation products, but less than nanogram amounts of free PAI-2 molecules. Enzyme immunoassay revealed that PAI-2 was present in an at least a seven times greater amount than PAI-1. These observations support the hypothesis that PA-generated proteolysis and its regulation by endogenous inhibitors has a role in the diverse biochemical mechanisms underlying periodontal physiology and pathology including host-microbial interaction, polymorphonuclear leucocyte infiltration, turnover and migration of epithelial cells, connective tissue degradation and remodelling, fibrinolysis and wound healing." @default.
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• W2076112401 date "1995-09-01" @default.
• W2076112401 modified "2023-09-25" @default.
• W2076112401 title "Molecular characterization of plasminogen activators in human gingival crevicular fluid" @default.
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• W2076112401 doi "https://doi.org/10.1016/0003-9969(95)00049-u" @default.
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