Indium conjugated murine IgG1 kappa monoclonal antibody directed against the CD20 antigen, which is found on the surface of normal and malignant B lymphocytes. Ibritumomab is produced in Chinese hamster ovary cells and is composed of two murine gamma 1 heavy chains of 445 amino acids each and two kappa light chains of 213 amino acids each. |
Brands | Zevalin (IDEC Pharmaceuticals)
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Categories | Antineoplastic Agents
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Packagers | S h
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Synonyms | Ig gamma-2A chain C region, membrane-bound form radiolabeled murine anti-CD20
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indication
For treatment of non-Hodgkin's lymphoma
pharmacology
Ibritumomab is a murine monoclonal antibody against CD20 that has been radiolabeled with yttrium-90.
mechanism of action
The Fab segment of the antibody targets the CD20 epitope on B-cells, allowing the radioactive yttrium to destroy the cell via production of beta particles.
biotransformation
Most likely removed by opsonization via the reticuloendothelial system when bound to B cells, or by human antimurine antibody production
half life
0.8 hours (mammalian reticulocytes, in vitro)