Figure S5 from CD19/CD20 Bispecific Chimeric Antigen Receptor (CAR) in Naive/Memory T Cells for the Treatment of Relapsed or Refractory Non-Hodgkin Lymphoma

Flow-cytometry analysis of post-infusion peripheral blood samples. (A) Gating strategy for T-cell analysis in CART19/20 cell products and post-infusion patient peripheral mononuclear blood cells (PBMCs). Two viable gates were set based on side scatter (SSC-A) vs. forward scatter (FSC-A). The more restrictive “Viable” gate includes only viable lymphocytes, to enable more precise identification of T cells. The “Viable (inclusive)” gate includes all viable PBMCs, to enable calculation of CAR-T cells as a fraction of PBMCs. Truncated epidermal growth factor receptor (EGFRt) is co-expressed with the CAR, and EGFRt staining is used for CAR expression detection. Percent CAR+ T cells among viable singlets as shown in main-text Fig. 4b is the EGFRt+ population as a % of grandparent in the viable PBMC branch.Percent CAR expression among T cells as shown in main-text Fig. 4c is the EGFRt+ population as a % of parent in the viable lymphocyte branch. (B) Examples of post-infusion patient sample analysis.