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B43-PAP immunotoxin
A mouse-derived anti-human CD19 monoclonal antibody linked to pokeweed (Phytolacca americana) antiviral protein (PAP) with antileukemic activity. The monoclonal antibody portion specifically binds to the CD19 antigen, a cell surface molecule normally expressed only by B lymphocytes and follicular dendritic cells and over-expressed in B-lineage lymphocytic leukemia cells. Following internalization, PAP, a plant hemitoxin and a ribosome-inactivating protein, is cleaved from the immunoconjugate and released into the cytoplasm where it enzymatically removes a single adenine base from a conserved, surface exposed loop sequence of rRNA leading to inhibition of protein synthesis and cell growth, but not necessarily cell death. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
| Synonyms: | | anti-CD19 immunotoxin B43 immunotoxin B43-pokeweed antiviral protein immunotoxin | |
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| Abbreviation: | | B43-PAP | |
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