Novel Anti-CD19 Universal CAR-T Cells for r/r CD19+ B-ALL

"UCAR-T Cellswill be administered by vein. The trial includes two portions. The first portion is a3+3dose escalation study, in which three dose groups are set:Dose level one:1×10\^6 cells/kg;Dose level two:2×10\^6 cells/kg;Dose level three:5×10\^6 cells/kg. Each dose group requires at least three subjects. The trial will start from dose level one. The second portion includes a dosage extended cohort and will start after the finish of the3+3dose escalation study. Twelve subjects will get infusion of UCAR-T Cells at the best dose verified in the first portion."