NCI Drug Dictionary
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.
- deglycosylated ricin A chain-conjugated anti-CD19/anti-CD22 immunotoxins
A combination preparation of 1:1 mixture of the immunotoxins HD37-dgA and RFB4-dgA with potential antineoplastic activity. Anti-CD19 IgG monoclonal antibody HD37 and anti-CD22 IgG monoclonal antibody RFB4 are attached individually to a deglycosylated ricin A chain (dgA) via N-succinimidyl-oxycarbonyl-alpha-methyl-alpha-(2-pyridyldithio) toluene (SMPT) linker. Deglycosylated ricin A chain-conjugated anti-CD19/anti-CD22 immunotoxins bind to CD19- and CD22-expressing tumor cells, specifically delivering cytotoxic ricin A chain to leukemia cells expressing these antigens. Ricin A chain is toxic to ribosomal activity and protein synthesis, and inhibits cell growth. CD19 and CD22 molecules are cell surface antigens present on the majority of B acute lymphoblastic leukemia (ALL) cells.
Check for active clinical trials using this agent. (NCI Thesaurus)
Synonym: IgG-HD37-dgA/IgG-RFB4-dgA immunotoxins US brand name: Combotox