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A recombinant therapeutic agent which is chemically identical to or similar to endogenous tissue plasminogen activator (tPA). tPA is a serine protease which converts plasminogen to plasmin, a fibrinolytic enzyme. Upon administration, alteplase increases plasmin enzymatic activity, resulting in hyperfibrinolysis and potential dissolution of a thrombus or embolism. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C39607\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C39607\' NCI Thesaurus)
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