NCI Drug Dictionary

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The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

anti-CD3 immunotoxin A-dmDT390-bisFv(UCHT1)
A bivalent recombinant fusion protein immunotoxin derived from the anti-CD3 monoclonal antibody UCHT1 with potential antineoplastic activity. Anti-CD3 immunotoxin A-dmDT390-bisFv(UCHT1) consists of 1-390 amino acid residues of chain A diphtheria toxin (DT) joined via a spacer to the Fv fragment of UCHT1, which is connected to a second UCHT1 Fv fragment via a disulfide bond (hence the "bisFv" designation); the addition of the second Fv fragment overcomes the steric hindrance of immunotoxin binding due to the large N-terminal DT domain. Once inside target T cells, the DT moiety catalyzes the transfer of the ADP-ribose moiety of NAD to diphthamide, a posttranslationally modified histidine residue found in elongation factor 2 (EF-2); inactivation of EF-2, disruption of polypeptide chain elongation, and cell death ensue. CD3 is a complex of five cell-surface polypeptides associated with the T cell receptor (TCR) complex. Check for active clinical trials using this agent. (NCI Thesaurus)
Synonyms:A-dmDT390-bisFv(UCHT1) fusion protein
anti-T cell immunotoxin A-dmDT390-bisFv(UCHT1)
US brand name:Resimmune