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.

CD28CAR/CD137CAR-expressing T lymphocytes
Third generation, chimeric antigen receptor (CAR) cells composed of T-lymphocytes transduced with a lentiviral vector expressing a CAR consisting of an a single chain variable fragment specific for a particular antigen, coupled to the two co-stimulatory signaling domains Cluster of Differentiation 28 (CD28) and Cluster of Differentiation 137 (CD137; 4-1BB), and the zeta chain of the T-cell receptor (TCR)/CD3 complex (CD3-zeta), with potential immunomodulating and antineoplastic activities. Upon transfusion, CD28CAR/CD137CAR-expressing T-lymphocytes are directed to, and induce selective toxicity in tumor cells expressing the particular antigen. CD28, a T-cell surface-associated co-stimulatory molecule that is required for T-cell activation, proliferation, and survival. The 4-1BB co-stimulatory molecule signaling domain enhances activation and signaling after recognition of the antigen. Furthermore, inclusion of the 4-1BB signaling domain may increase the antitumor activity when compared to the inclusion of the CD28 co-stimulatory domain and CD3-zeta alone. Check for active clinical trials using this agent. (NCI Thesaurus)