Department of Hematology & Hematopoietic Cell Transplantation, T Cell Therapeutics Research Laboratories, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA, USA.
Department of Hematology & Hematopoietic Cell Transplantation, T Cell Therapeutics Research Laboratories, City of Hope National Medical Center and Beckman Research Institute, Duarte, CA, USA.
Cell Stem Cell. 2022 Apr 7;29(4):515-527.e8. doi: 10.1016/j.stem.2022.02.009. Epub 2022 Mar 11.
Unlimited generation of chimeric antigen receptor (CAR) T cells from human-induced pluripotent stem cells (iPSCs) is an attractive approach for "off-the-shelf" CAR T cell immunotherapy. Approaches to efficiently differentiate iPSCs into canonical αβ T cell lineages, while maintaining CAR expression and functionality, however, have been challenging. We report that iPSCs reprogramed from CD62L naive and memory T cells followed by CD19-CAR engineering and 3D-organoid system differentiation confers products with conventional CD8αβ-positive CAR T cell characteristics. Expanded iPSC CD19-CAR T cells showed comparable antigen-specific activation, degranulation, cytotoxicity, and cytokine secretion compared with conventional CD19-CAR T cells and maintained homogeneous expression of the TCR derived from the initial clone. iPSC CD19-CAR T cells also mediated potent antitumor activity in vivo, prolonging survival of mice with CD19 human tumor xenografts. Our study establishes feasible methodologies to generate highly functional CAR T cells from iPSCs to support the development of "off-the-shelf" manufacturing strategies.
从人诱导多能干细胞 (iPSC) 中无限生成嵌合抗原受体 (CAR) T 细胞是“现货”CAR T 细胞免疫疗法的一种有吸引力的方法。然而,高效地将 iPSC 分化为典型的 αβ T 细胞谱系,同时保持 CAR 的表达和功能,一直具有挑战性。我们报告说,从 CD62L 幼稚和记忆 T 细胞重编程的 iPSC,随后进行 CD19-CAR 工程和 3D 类器官系统分化,赋予了具有常规 CD8αβ-CAR T 细胞特征的产物。与常规 CD19-CAR T 细胞相比,扩增的 iPSC CD19-CAR T 细胞显示出可比的抗原特异性激活、脱颗粒、细胞毒性和细胞因子分泌,并保持初始克隆衍生的 TCR 的同质表达。iPSC CD19-CAR T 细胞还在体内介导了强大的抗肿瘤活性,延长了携带 CD19 人肿瘤异种移植物的小鼠的存活时间。我们的研究建立了从 iPSC 中生成高功能 CAR T 细胞的可行方法,以支持“现货”制造策略的发展。
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