Definition

A preparation of autologous T lymphocytes that are engineered to express a chimeric antigen receptor (CAR) composed of an anti-cluster of differentiation 19 (CD19) single chain variable fragment (scFv) linked to the signaling domains of 4-1BB (CD137) and the zeta chain of the TCR/CD3 complex (TCRzeta; CD247; CD3zeta), with potential immunomodulating and antineoplastic activities. Upon administration, welgenaleucel targets, binds to and induces selective toxicity in CD19-expressing tumor cells. CD19 antigen is a B-cell specific cell surface antigen expressed in all B-cell lineage malignancies.