通过免疫突触稳定受体增强CAR和TCR介导的向癌症
Chiou-Tsun Tsai1,2, Jorge Ibanez-Vega3, Pan Yin1
1Center for Cell and Gene Therapy, Baylor College of Medicine, Houston, TX, USA.
Nature communications
|February 4, 2026
概括
工程T细胞疗法可以通过一种新的突触稳定受体 (SSR) 来改进. 这种SSR增强了癌细胞识别和低抗原表达的瘤中的溶解,改善了治疗结果.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 生物技术是生物技术.
背景情况:
- 癌症抗原异质性限制了工程T细胞治疗的有效性.
- 抗原逃逸是治疗耐药性的关键机制.
研究的目的:
- 开发一种新的策略,以增强T细胞识别和瘤溶解,以低于最佳的抗原表达.
- 设计一个突触稳定受体 (SSR),增强细胞毒性信号传递和免疫突触形成.
主要方法:
- 为激活T细胞 (LAT) 内域设计了一种具有修改链接器的SSR,以放大CD3ζ信号传输.
- 在急性髓性白血病模型中研究SSR功能,使用仿真抗原受体 (CAR) 和T细胞受体 (TCR).
- 评估SSR介导的细胞毒性对癌细胞和正常组织.
主要成果:
- 该SSR放大T细胞信号,导致增强的Ca2+流,MAPK/NF-kB激活和T细胞降粒.
- 鉴定出一种经过修改的LAT内域 (LAT177),以尽量减少SSR介导的细胞毒性.
- 针对CD38的SSR增强了低抗原癌细胞的溶解,与CLL1特异性CAR和幸存者特异性TCR相结合.
- 通过SSR的选择性,避免了对正常CD38+组织的显著细胞毒性.
结论:
- 激活SSR增强了针对抗原异质癌症的向性.
- 这一策略提高了治疗T细胞的安全性和选择性.
- 在工程T细胞疗法中,SSR代表了一种有希望的方法来克服治疗耐药性.
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