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Updated: Jan 18, 2026

Performing an In Vitro Genome-Wide CRISPR Knockout Screen in Chimeric Antigen Receptor T Cells
Published on: January 31, 2025
Mapping kinase-dependent tumor immune adaptation with multiplexed single-cell CRISPR screens
Lingting Shi1,2, Ross M Giglio3, Qingyuan Cai4
1Irving Institute for Cancer Dynamics, Columbia University, New York, NY, 10027, USA.
Abstract:
Immune dysfunction in cancer is enacted by multiple programs, including tumor cell-intrinsic responses to distinct immune subpopulations. A subset of these immune evasion programs can be systematically recapitulated through direct tumor-immune interactions in vitro. Here, we present an integrated, high-throughput single-cell CRISPR screening framework focused on the protein kinome for mapping the tumor-intrinsic regulation of T cell-driven immune pressure in glioblastoma (GBM). We combine pooled CRISPR interference and activation (CRISPRi/a) with immune-matched NY-ESO-1 antigen-specific allogeneic GBM-T cell co-culture and massively multiplexed single-cell transcriptomics to systematically quantify how genetic perturbation reshapes baseline tumor state and adaptive responses across graded effector-to-target ratios. We further leverage deep generative models for analyzing pooled CRISPR screens to decipher the effects of genetic perturbations on the mechanisms of tumor resistance. This framework resolves distinct modules of immune evasion and survival, including the regulation of the antigen-presentation machinery, interferon/NF-κB signaling, oxidative stress resilience, and checkpoint/cytokine programs, while identifying perturbations that reroute the continuous tumor transcriptional trajectory induced by T cell engagement. A secondary chemical screen in patient-derived GBM cultures identified putative kinase targets of immune evasion phenotypes (e.g., EPHA2 and PDGFRA), whose inhibition leads to the blockade of evasive programs and enhances T cell-mediated GBM killing. Together, this workflow provides a scalable blueprint for comprehensive charting of the genetic control of tumor-immune interactions.
Insights
This study maps glioblastoma's (GBM) tumor-intrinsic immune evasion strategies using CRISPR screening. It identifies kinase targets like EPHA2 and PDGFRA that, when inhibited, enhance T cell-mediated killing of GBM tumors.
Area of Science:
- Cancer immunology
- Genomics
- Single-cell analysis
Background:
- Tumor cells employ intrinsic programs to evade immune attack.
- Direct tumor-immune interactions can model these evasion mechanisms in vitro.
Purpose of the Study:
- To map tumor-intrinsic regulation of T cell-driven immune pressure in glioblastoma (GBM).
- To identify genetic perturbations that alter tumor state and adaptive responses to T cell engagement.
Main Methods:
- High-throughput single-cell CRISPR screening (CRISPR interference and activation) focused on the protein kinome.
- Allogeneic GBM-T cell co-culture with immune-matched antigen specificity.
- Massively multiplexed single-cell transcriptomics and deep generative models for data analysis.
Main Results:
- Resolved distinct modules of immune evasion, including antigen presentation, interferon/NF-κB signaling, oxidative stress resilience, and cytokine programs.
- Identified genetic perturbations that alter tumor transcriptional trajectories under T cell pressure.
- Discovered kinase targets (EPHA2, PDGFRA) involved in GBM immune evasion phenotypes.
Conclusions:
- The developed CRISPR screening framework provides a scalable blueprint for dissecting tumor-immune interactions.
- Inhibition of identified kinase targets enhances T cell-mediated killing of glioblastoma.
- This research elucidates genetic control mechanisms underlying tumor immune evasion.

