... Hurskainen, T., Hoyta, M., Oikarinen, A. & Autio-Harmainen, H. (1994) 72 kDa and 92 kDa type IV collagenase,type IV collagen and laminin mRNAs in breast cancer: a study by in situ hybridisation. ... plasminogen activation and impair laminin degradation by plasmin. Our data pro-vide evidence that MMP-3 can inhibit breast tumour cell invasion in vitro by a mechanism involving plasminogendegradation ... 2C, intact tcuPA-activated plasmino-gen, at an enzyme substrate ratio of 1 : 100, almostFig. 2. MMP-3 degrades plasminogen, impairs plasminogen activation and impairs plasmin-mediated laminin...