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A recombinant immunotoxin consisting of the single chain anti-mesothelin monoclonal antibody SS1(dsFv) linked to Pseudomonas exotoxin PE-38. The monoclonal antibody moiety of the agent binds to cells that express mesothelin, a cell surface glycoprotein which may be overexpressed in ovarian cancer, mesotheliomas, and some squamous cell carcinomas; after internalization, the exotoxin moiety inactivates eukaryotic translation elongation factor 2, thereby disrupting tumor cell protein synthesis. Check for \'https://www.cancer.gov/about-cancer/treatment/clinical-trials/intervention/C2609\' active clinical trials using this agent. (\'http://ncit.nci.nih.gov/ncitbrowser/ConceptReport.jsp?dictionary=NCI%20Thesaurus&code=C2609\' NCI Thesaurus)
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