Compositions of the polypeptide SEQ ID NO:1, SEQ ID NO:2, anti-LRP antibodies, LRP antagonists, and/or one or more fibrinolytic agents are formulated for enhancing the fibrinolytic activity, reducing the side effects due to vasoactivity caused by the fibrinolytic agents, and/or prolonging the half lives of the fibrinolytic agents. The invention further relates to combination compositions and/or therapy regimens, comprising the polypeptide SEQ ID NO:1 and/or SEQ ID NO:2 and one or more currently used plasminogen activators.