Louis V. Gerstner Jr. Graduate School of Biomedical Sciences, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Department of Medicine, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
Cancer Cell. 2019 Mar 18;35(3):473-488.e6. doi: 10.1016/j.ccell.2019.02.006.
Chimeric antigen receptor (CAR) T cells provide great efficacy in B cell malignancies. However, improved CAR T cell therapies are still needed. Here, we engineered tumor-targeted CAR T cells to constitutively express the immune-stimulatory molecule CD40 ligand (CD40L) and explored efficacy in different mouse leukemia/lymphoma models. We observed that CD40L CAR T cells circumvent tumor immune escape via antigen loss through CD40/CD40L-mediated cytotoxicity and induction of a sustained, endogenous immune response. After adoptive cell transfer, the CD40L CAR T cells displayed superior antitumor efficacy, licensed antigen-presenting cells, enhanced recruitment of immune effectors, and mobilized endogenous tumor-recognizing T cells. These effects were absent in Cd40 mice and provide a rationale for the use of CD40L CAR T cells in cancer treatment.
嵌合抗原受体 (CAR) T 细胞在 B 细胞恶性肿瘤中具有显著疗效。然而,仍需要改进 CAR T 细胞疗法。在这里,我们设计了靶向肿瘤的 CAR T 细胞,使其持续表达免疫刺激性分子 CD40 配体 (CD40L),并在不同的小鼠白血病/淋巴瘤模型中探索其疗效。我们观察到 CD40L CAR T 细胞通过 CD40/CD40L 介导的细胞毒性和诱导持续的内源性免疫反应,规避了抗原丢失导致的肿瘤免疫逃逸。在过继细胞转移后,CD40L CAR T 细胞表现出优越的抗肿瘤疗效,许可抗原呈递细胞,增强免疫效应细胞的募集,并动员内源性肿瘤识别 T 细胞。在 Cd40 小鼠中观察不到这些效应,为 CD40L CAR T 细胞在癌症治疗中的应用提供了理论依据。