VB4-845, a conjugated recombinant antibody and immunotoxin for head and neck cancer and bladder cancer.

Viventia Biotech Inc, under license from the University of Zurich, is developing VB4-845, comprising a Pseudomonas exotoxin fused to an anti-epithelial cell adhesion molecule single-chain antibody fragment, for the potential treatment of head and neck cancer (intratumoral) and bladder cancer (intravesical). VB4-845 is currently undergoing phase II and III clinical trials in patients with head and neck squamous cell carcinomas, as well as phase II clinical trials for the treatment of superficial transitional cell carcinoma of the bladder.