Oportuzumab monatox

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Oportuzumab monatox
Monoclonal antibody
TypeSingle-chain variable fragment
Clinical data
Trade namesVicineum
ATC code
CAS Number
  • none
Chemical and physical data
Molar mass69558.48 g·mol−1
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Oportuzumab monatox (proposed INN, trade name Vicineum) is an antineoplastic. Chemically, oportuzumab is a single chain variable fragment of a monoclonal antibody which binds to epithelial cell adhesion molecule (EpCAM, the tumor-associated calcium signal transducer 1). Oportuzumab is fused with Pseudomonas aeruginosa exotoxin A (which is reflected by the monatox in the drug's name).[1]

The drug was originally developed by Canadian-based Viventia Bio Inc. The company was acquired by Cambridge(MA)-based Eleven Biotherapeutics in 2016 which then changed its name to Sesen Bio.[2] In 2019 Sesen Bio reported updated, preliminary primary and secondary endpoint data from the company's Phase 3 VISTA trial further supporting the strong benefit-risk profile of Vicineum for the potential treatment of patients with high-risk, bacillus Calmette-Guérin(BCG) unresponsive, non-muscle invasive bladder cancer (NMIBC).[3] The Company applied for approval of Vicineum by the United States Food and Drug Administration und the European Medicines Agency.


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