Abstract
We have previously investigated the role of the urokinase plasminogen activator (uPA) system in NK cell invasion. We have also studied NK cell-derived matrix metalloproteinases (MMPs) in extracellular matrix (ECM) degradation. We now report that both enzyme systems cooperate in NK cell invasion. Zymographic analyses detected uPA in RNK-16 cell conditioned media (CM) with the same molecular weights as the uPA we have previously shown to be associated with the rat NK cell urokinase plasminogen activator receptor. The combination of aprotinin, an inhibitor of plasmin, and Batimastat (BB94), an inhibitor of MMPs, in Matrigel invasion assays showed a more potent inhibitory effect on NK cell invasion than either inhibitor alone. Finally, a down regulation of uPA mRNA was noted following RNK-16 stimulation with collagen IV, fibronectin, and laminin.
Original language | English (US) |
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Pages (from-to) | 565-570 |
Number of pages | 6 |
Journal | In Vivo |
Volume | 14 |
Issue number | 5 |
State | Published - 2000 |
Externally published | Yes |
Keywords
- Aprotinin
- BB-94
- Matrix metalloproteinases
- Urokinase plasminogen activator (uPA)
ASJC Scopus subject areas
- General Biochemistry, Genetics and Molecular Biology
- Pharmacology