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.

anti-CD123 x anti-CD3 bispecific antibody XmAb14045
An anti-CD123/anti-CD3 bispecific monoclonal antibody, in which most of the naturally-occurring Fc domain is maintained, with potential immunostimulatory and antineoplastic activities. Anti-CD123/CD3 monoclonal antibody XmAb14045 possesses two antigen-recognition and binding sites, one for the CD3 complex, a group of T-cell surface glycoproteins that complex with the T-cell receptor (TCR), and one for CD123, a tumor-associated antigen (TAA) overexpressed on the surface of certain tumor cells. Upon administration of XmAb14045, this bispecific antibody simultaneously binds to both CD3-expressing T cells and CD123-expressing cancer cells, thereby crosslinking CD123-expressing tumor cells and cytotoxic T lymphocytes (CTLs). This may result in potent CTL-mediated cell lysis of CD123-expressing tumor cells. CD123, the interleukin-3 receptor alpha chain, is overexpressed in a variety of hematological malignancies; its expression is low or absent in normal hematopoietic progenitors and stem cells. The Fc domain on the antibody prolongs the half-life of the bispecific antibody and enhances T-cell-mediated tumor cell killing through its binding to the Fc receptors. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:anti-CD123/anti-CD3 bispecific antibody XmAb1404
Code name:XmAb14045