Fig 4. Cell function test after ⁸⁹Zr-DFO-labeled Jurkat/CAR T-cells and hPBMC CAR T-cells.

a Function test by IL-2 production of ⁸⁹Zr-DFO-labeled Jurkat/CAR T-cells after incubation with Raji (CD19 positive) or K562 (CD19 negative) cells. Incubation time was 12 hours or 36 hours, and unlabeled cells were used in the experiment as a control group. b Function test by IL-2 production of ⁸⁹Zr-DFO-labeled Jurkat/CAR T-cells or hPBMC CAR T-cells after incubation with Raji or K562 cells. c IFN-γ test of ⁸⁹Zr-DFO-labeled hPBMC CAR T-cells with Raji or K562 cells. Data are representative of at least two independent experiments. All data are expressed as means and standard deviations.