Ki: 0.41 μM (Urokinase-type plasminogen activator (uPA))
Serine protease

UKI-1 (WX-UK1; 0.1-1.0 μg/mL) treatment shows a decrease of tumor cell invasion by up to 50% is achieved in both models with the SCCHN line FaDu and the cervical carcinoma line HeLa.
UKI-1 (WX-UK1) interferes with the plasminogen activation system at 2 levels: it inhibits plasmin formation directly and via inhibition of uPA. In vitro invasion models with highly invasive fibrosarcoma and breast cancer cells showed that UKI-1 effectively inhibits migration of the cells through fibrin matrices.

UKI-1 (WX-UK1) treatment has antimetastatic activities that significantly reduces the number of metastatic lesions and tumor growth in metastasizing rat pancreatic and mammary adenocarcinoma tumor models.