Phase 1 results with UCART19 in kids

Two patients relapsed 3 months after transplant and died at 7 months and 8 months after UCART19 infusion. One of these patients was CD19-, and 1 was CD19+, but both were MRD-positive by PCR prior to receiving their transplant.

A third patient died 2.5 months after allo-HSCT from transplant-related complications, including thrombotic microangiopathy, BK hemorrhagic cystitis, and nephritis.

The remaining 3 patients are still alive at 1.5 months, 10 months, and 11 months after UCART19 infusion. Two are still MRD-negative, and 1 is MRD-positive. The MRD-positive patient has not undergone allo-HSCT.

*Data in the abstract were updated in the presentation.