Synthetic serine protease inhibitors (sSPIs) are promising cancer therapeutics. Therefore, it should be determined if selectivity-optimization of sSPIs leads to maximal anti-metastatic effects and minimal side effects, as known from matrix metalloprotease inhibitors. Screening of structurally related 4-amidinobenzylamine-based sSPIs revealed a close correlation between their anti-metastatic efficacy and selectivity for blood coagulation factor Xa (FXa) in the T cell lymphoma model. The selective and weak anticoagulant FXa-inhibitor WX-FX4 as well as the selective urokinase-type plasminogen activator inhibitor CJ-463 displayed, in addition to a drastic anti-metastatic efficacy in the murine T cell lymphoma and human fibrosarcoma model, a significant prolongation of survival without inducing side-effects. These results show for the first time, that selectivity-optimization of sSPIs is a highly beneficial strategy to enhance anti-metatstatic efficacy and minimize side-effects.
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Synthetic serine protease inhibitors (sSPIs) are promising cancer therapeutics. Therefore, it should be determined if selectivity-optimization of sSPIs leads to maximal anti-metastatic effects and minimal side effects, as known from matrix metalloprotease inhibitors. Screening of structurally related 4-amidinobenzylamine-based sSPIs revealed a close correlation between their anti-metastatic efficacy and selectivity for blood coagulation factor Xa (FXa) in the T cell lymphoma model. The selective...
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