Fig. 1

Multiplexed CRISPR-Cas9 gene-editing is efficient in primary human T cells. a Schematic representation of the EGFRvIII targeted CAR construct. b Primary human T cells were stimulated, RNP electroporated and transduced to produce CAR T cells. c Following expansion, cells were subjected to flow cytometry for TCR and B2M expression. d Bivariate plot displays frequency of cells with both TCR and B2M deletion. e EGFRvIII CAR T cells that have been gene-edited for PD-1 (CART-EGFRvIIIΔPD-1) do not have the ability to interact with PD-L1 expressed on target cells. f Effector cells were incubated with irradiated U87vIII for 1 week and subjected to flow cytometric analysis for surface PD-1 expression. The control group contains cells gene-edited for both TCR and B2M, and mock transduced with AAV