化学合成T细胞受体和抗原受体受体使高灵敏性T细胞受体-阴性CD8αβ-CD3阳性T细胞从人类诱导的多能干细胞发育
Chaoqi Zhang1, Michael Rassner2, Yohei Kawai1
1Shin Kaneko Laboratory, Department of Cell Growth and Differentiation, Center for iPS Cell Research and Application (CiRA), Kyoto University, Kyoto, Japan.
Cytotherapy
|December 12, 2025
概括
合成T细胞受体 (TCR) 和抗原受体 (STAR) 结构使诱导多能干细胞 (iPSC) 衍生的T细胞能够克服癌症免疫治疗中的挑战. 这些STAR-iT细胞表现出增强的瘤细胞杀伤和改善的抗原敏感性.
科学领域:
- 免疫学 免疫学 免疫学
- 细胞生物学 细胞生物学
- 生物技术是生物技术.
背景情况:
- 诱导多能干细胞 (iPSC) 衍生T细胞为所有原性免疫疗法提供了潜力.
- 目前面临的挑战包括分化效率,抗原敏感性,以及用仿真抗原受体 (CARs) 准细胞内瘤抗原.
研究的目的:
- 引入一种新的合成T细胞受体 (TCR) 和抗原受体 (STAR) 结构,用于iPSC衍生的T细胞.
- 评估STAR工程T细胞对威尔姆斯瘤1 (WT1) 表达癌细胞的疗效.
主要方法:
- 开发一种STAR结构,将单链变量片段 (scFv) 融合到TCRαβ常数区域.
- 来自STAR-iPSC的T细胞 (STAR-iT细胞) 的生成和表征.
- 评估STAR-iT细胞分化,CD3表达,抗原敏感性,细胞毒性,细胞因子产生和体外扩张.
主要成果:
- STAR-iT细胞恢复了CD3的表达,使得有效的iPSC-T细胞可以在没有内源性TCR的情况下发育.
- 与基于CAR的T细胞相比,STAR-iT细胞表现出更高的抗原敏感性.
- STAR-iT细胞对WT1表达瘤细胞表现出强大的细胞毒性,增强了细胞因子的释放,以及高效的扩张.
结论:
- STAR构造代表了一种新的,基于scFv的嵌合式受体格式.
- STAR-iT细胞推动了用于癌症治疗的通用,现成的T细胞免疫疗法的发展.
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