Definition

A preparation of T lymphocytes that are genetically engineered to express a fourth-generation chimeric antigen receptor (4SCAR) targeting the two tumor-associated antigens (TAAs) disialoganglioside (GD2) and CD70 (CD27 ligand; tumor necrosis factor superfamily member 7; TNFSF7), with potential immunostimulating and antineoplastic activities. Upon administration, the anti-GD2/anti-CD70 4SCAR-expressing bispecific T cells are directed to and induce selective toxicity in GD2- and CD70-expressing tumor cells. GD2 is overexpressed on the surface of neuroblastoma cells and by other neuroectoderm-derived neoplasms, while it is minimally expressed on normal cells. CD70, a cytokine belonging to the tumor necrosis superfamily (TNFSF) and the ligand for the costimulatory receptor CD27, is expressed on the surfaces of various types of cancer cells; its overexpression may play an important role in the evasion of immune surveillance.