(LEFT) Representative histograms showing CAR + intracellular GSH content using ThiolTracker for CD19 +/- GLUT1OE CAR-T cells +/- 4 h 1 ug / mL anti-idiotype stimulation. (RIGHT) Quantitative data of CAR + GSH MFI. Cotransduced cells were magnetically enriched for greater than 95% double positive prior to experiment. Data from n = 4 donors. P values determined by paired t -tests.