Abstract
Pure human cellular receptor for urokinase plasminogen activator (u-PAR) and forms thereof, including a truncated water-soluble form produced by cleaving or removing a glycosyl-phosphatidylinositol anchor, are provided, as is cDNA for u-PAR. Cell surface plasminogen activation, believed to play an important role in tissue remodelling, particularly during cancer invasion, is inhibited by antibodies against u-PAR and by inactivated analogues of u-PA. In situ hybdridization showed presence of u-PAR mRNA in the invasion front of colon carcinomas, proving the diagnostic utility of the cDNA. Water-soluble u-PAR is useful for inhibition of u-PA catalyzed plasminogen activation in solution.
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