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-CD3/humanized 3F8 bispecific antibody-activated T lymphocytes
Autologous activated T cells that have been coated with bispecific antibodies (BiAb) comprised of anti-CD3 murine monoclonal antibody OKT3 heteroconjugated to anti-GD2 humanized monoclonal antibody 3F8 (hu3F8), with potential antineoplastic and immunomodulating activities. In vitro, T cells are exposed to OKT3, which binds to the T cell receptor-CD3 complex on the T cell surface, crosslinks the CD3 receptors and leads to T cell activation. In turn, the hu3F8 monoclonal antibody is heteroconjugated to OKT3. Upon administration, anti-CD3 x anti-GD2 bispecific antibody-armed activated T cells attach to GD2-expressing tumor cells, thereby selectively cross-linking T cells and tumor cells. This results in selective cytotoxicity towards the GD2-expressing tumor cells. In addition, cytokine and chemokine secretion by the T cells further activates the immune system, which leads to the recruitment and activation of cytotoxic T lymphocytes (CTLs), and additional CTL-mediated tumor-specific cell lysis. GD2, a disialoganglioside and tumor-associated antigen, is overexpressed in a variety of tumor cell types. CD3 is part of the functional T cell receptor (TCR) complex, which is necessary for antigen recognition by T cells, and is required for signal transduction. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:anti-CD3 x hu3F8 bispecific antibody-armed ATC
OKT3/humanized 3F8 bispecific antibody-activated T lymphocytes
Abbreviation:GD2Bi-a ATC
Hu3F8Bi-armed ATC