Immune evasion occurs through loss of TNF, IFN-γ, or antigen presentation pathways. Immune evasion occurs through loss of TNF, IFN-γ, or antigen presentation.

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Presentation transcript:

Immune evasion occurs through loss of TNF, IFN-γ, or antigen presentation pathways. Immune evasion occurs through loss of TNF, IFN-γ, or antigen presentation pathways. (A) Experimental design of CRISPR/Cas9 screening. (B) OT-I T cell–MC38Ova killing and TNF secretion assays in the presence or absence of a neutralizing α–PD-1 antibody (50 μg/ml). (C) MC38Ova cells were subjected to three rounds of exposure to OT-I T cells, as described in (A), followed by sequencing for the top enriched genes. (D) The screen from (C) was carried out in parallel, in the presence of α–PD-1 (50 μg/ml), followed by sequencing for the top enriched genes. (E) Comparison of top scoring genes in screens described in (C) and (D). (F) Normalized sgRNA counts from the screen described in (C). unt, untreated. (G) Validation of screen hits using the indicated individual sgRNAs in MC38Ova upon an 18-hour exposure to OT-I T cells. (H) Protein network analysis of the screen hits from (D). (I) GO term analysis from the screen hits from (D). (J) The screen described in (A) was performed using B16Ova cells. After three rounds of exposure to OT-I T cells, the cells were sequenced for the top enriched genes. WT, wild type. (K) Protein network analysis from the top hits identified in (J). (L) GO term analysis from the top hits identified in (J). (M) The screen described in (A) was performed using MDA-MB-231 cells. After three rounds of exposure to HER2-directed human CAR T cells, the cells were sequenced for the top enriched genes. Conor J. Kearney et al. Sci. Immunol. 2018;3:eaar3451 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works