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Structural Design of Engineered Costimulation Determines Tumor Rejection Kinetics and Persistence of CAR T Cells

机译:工程共刺激的结构设计决定了肿瘤排斥动力学和CAR T细胞的持久性

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摘要

T cell engineering is a powerful means to rapidly generate anti-tumor T cells. The costimulatory properties of second-generation chimeric antigen receptors (CARs) determine the overall potency of adoptively transferred T cells. Using an in vivo "stress test'' to challenge CD19-targeted T cells, we studied the functionality and persistence imparted by seven different CAR structures providing CD28 and/or 4-1BB costimulation. One configuration, which uses two signaling domains (CD28 and CD3 zeta) and the 4-1BB ligand, provided the highest therapeutic efficacy, showing balanced tumoricidal function and increased T cell persistence accompanied by an elevated CD8/CD4 ratio and decreased exhaustion. Remarkably, induction of the IRF7/IFN beta pathway was required for optimal anti-tumor activity. Thus, 1928z-41BBL T cells possess strikingly potent intrinsic and immunomodulatory qualities.
机译:T细胞工程学是快速生成抗肿瘤T细胞的有力手段。第二代嵌合抗原受体(CARs)的共刺激特性决定了过继转移T细胞的整体效能。我们使用体内“压力测试”挑战以CD19为目标的T细胞,我们研究了提供CD28和/或4-1BB共刺激的7种不同CAR结构所赋予的功能和持久性。一种配置使用两个信号域(CD28和CD3 zeta)和4-1BB配体提供最高的治疗效果,显示出平衡的杀肿瘤功能和T细胞持久性,并伴有CD8 / CD4比值升高和疲惫状态降低,值得注意的是,IRF7 / IFNβ途径需要诱导因此,1928z-41BBL T细胞具有强大的内在和免疫调节特性。

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