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. 2021 Nov 1;12:782775. doi: 10.3389/fimmu.2021.782775

Figure 7.

Figure 7

A brief overview of potential challenges faced by CAR-T cell therapy, including antigen evasion, metabolic barrier, CAFs, fibrotic environment, immunosuppression of TME, and exhaustion of CAR-T cells. The possible mechanisms and engineering strategies are also presented.