Methods for inhibiting angiogenesis comprising administering tissue-plasminogen activator (tPA) inhibitors, and pharmaceutical compositions suitable for the methods comprising the tPA inhibitors. Also provided are methods for stimulating angiogenesis comprising administering tPA to a patient in need thereof, and pharmaceutical compositions comprising an effective amount of tPA for the methods of stimulation. The present invention discloses that tPA is a specific PDGF-C activating protease, and that the CUB-domains in PDGF-CC directly interact with the protease, are required for efficient proteolysis, and released CUB-domains are tPA inhibitors. Preferably, the method and compositions of the present invention are used for simultaneously stimulating, or simultaneously inhibiting, thrombolysis and angiogenesis.