Definition

A preparation of allogeneic, off-the-shelf (OTS), universal transcription activator-like effector nuclease (TALEN)-engineered T lymphocytes that have been genetically modified to express a chimeric antigen receptor (CAR) targeting the tumor-associated antigen (TAA) human CD22 with potential immunomodulating and antineoplastic activities. Upon transfusion, allogeneic CD22-specific universal CAR-expressing T lymphocytes UCART22 express anti-CD22-CAR on their cell surfaces and bind to the CD22 antigen on tumor cell surfaces, resulting in lysis of CD22-expressing tumor cells. CD22, a cell surface glycoprotein, is expressed on mature B-cells and on most malignant B cells.