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Urokinase plasminogen activator (uPA) has been implicated in the healing responses of injured arteries, but the importance of its various properties that influence smooth muscle cell (SMC) proliferation and migration in vivo is unclear. We used three recombinant (r-) forms of uPA, which differ markedly in their proteolytic activities and abilities to bind to the uPA receptor (uPAR), to determine,...
We defined the role of urokinase plasminogen activator (uPA) and its growth factor-like domain (GFD) in stimulating smooth muscle cell (SMC) migration. Recombinant uPA (r-uPA) stimulated migration approximately 3-fold whilst the recombinant uPA mutant containing an altered GFD (r-uPAmut) was ineffective. Both uPA variants bound to the same high affinity receptor in a competitive manner. FGF-2- and...
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