Study of Redirected Autologous T Cells Engineered to Contain Anti-CD19 Attached to TCR and 4-1BB Signaling Domains in Patients With Chemotherapy Resistant or Refractory Acute Lymphoblastic Leukemia

CART-19 cells transduced with a lentiviral vector to express anti-CD19 scFv TCR:41BB administered by a single i.v. infusion of 1 to 5 x 10\^8 transduced CAR T cells

As of June 2014, dose was reduced to a single dose of 1-5x10\^7 CART-19 cells.

In the protocol amendment in November 2014, the dose remained 1-5 x 10\^7 CART-19 cells, but was revised to be administered via split dosing: 10% on Day 1, 30% on Day 2, 60% on Day 3.

In the protocol amendment in May 2015, the dose was changed to 1-5 x 10\^8 CART-19 cells administered via split dosing: 10% on Day 1 (1-5x10\^7), 30% on Day 2 (3x10\^7-1.5x10\^8), 60% on Day 3 (6x10\^7-3x10\^8).