利用CD3多样性来优化CAR T细胞的使用.
Rubí M-H Velasco Cárdenas1,2, Simon M Brandl1,2,3, Ana Valeria Meléndez1,2,3
1Faculty of Biology, University of Freiburg, Freiburg, Germany.
Nature immunology
|November 6, 2023
概括
新的仿真抗原受体 (CAR) T细胞使用CD3细胞质尾巴,而不仅仅是zeta (ζ) 链,显示出改善的抗瘤活性. 这些工程化CAR T细胞可以通过防止T细胞耗尽来增强癌症免疫疗法.
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:
- 目前的仿真抗原受体 (CAR) T细胞疗法利用T细胞受体 (TCR) 衍生的zeta (ζ) 链作为细胞内激活域.
- 在CAR中,其他TCR复杂链 (CD3δ,CD3ε,CD3γ) 的功能作用在很大程度上尚未被探索.
研究的目的:
- 设计和评估包含单个CD3细胞内域 (CD3δ,CD3ε,CD3γ) 的新型CAR T细胞,作为传统 ζ 链的替代品.
- 调查这些新型CAR结构观察到的增强抗瘤功效的机制基础.
主要方法:
- 对表达单个CD3细胞内域 (CD3δ,CD3ε,CD3γ) 或常规 ζ 链的CAR T 细胞进行系统工程.
- 在体内疗效研究比较工程CAR T细胞与传统CAR T细胞.
- 转录和蛋白质组分析以评估T细胞激活,代谢和功能障碍.
- 研究CAR二元化对功能的影响.
- 用CAR作为替代TCRs识别CD3细胞内域的新型相互作用伙伴.
主要成果:
- 结合CD3δ,CD3ε或CD3γ细胞质尾巴的CARs在体内表现出与传统 ζCAR T细胞相比更好的抗瘤性能.
- 转录基因和蛋白质基因分析揭示了新型CAR T 细胞中激活,代谢和降低T 细胞功能障碍的不同配置.
- CAR结构的二元化进一步增强了T细胞的整体功能.
- 酸酶SHP-1被确定为CD3δ的新型结合伙伴,在氨酸酸化时与CD3δ-ITAM基因相互作用.
- 表明SHP-1与CD3δ结合减弱T细胞激活信号,可能减轻T细胞耗尽.
结论:
- CD3δ,CD3ε和CD3γ细胞内域代表了CAR T细胞工程中对z链的可行和优越的替代品.
- 这些发现提供了对T细胞激活和功能障碍的机制性见解,突出了SHP-1在调节CAR T细胞反应中的作用.
- 基于这些见解的合成抗原受体的理性重新设计,有望促进癌症免疫治疗和克服T细胞疲劳.
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