用基于TCR的嵌合式抗原受体治疗固体瘤,向额外B域含有纤维龙菌素的B域
Zhijie Zhang1, Chang Liu1, Muhan Wang1
1School of Life Science and Technology, China Pharmaceutical University, Nanjing, Jiangsu, China.
Journal for immunotherapy of cancer
|August 16, 2023
概括
重定向的TCR-CAR T细胞准EDB-纤维素素,在固体瘤中克服瘤微环境的抑制. 这种新疗法在体内表现出卓越的疗效,并降低了瘤生长,为癌症治疗提供了一种有前途的新方法.
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:
- 化学抗原受体 (CAR) T细胞疗法在固体瘤中面临挑战,原因是抑制性瘤微环境 (TME).
- 额外域B (EDB) - 纤维蛋白是一种存在于瘤新血管和癌细胞上的胎儿抗原,被确定为潜在的T细胞治疗点.
- 现有的CAR T细胞在体内对固体瘤的疗效有限.
研究的目的:
- 开发和评估重定向的TCR-CAR T细胞 (rTCR-CAR) 针对EDB-纤维蛋白来克服TME抑制.
- 研究rTCR-CAR T细胞在固体瘤治疗中的疗效.
- 将rTCR-CAR T细胞与传统的CAR T细胞设计进行比较.
主要方法:
- 通过将单链变量片段合并到CD3ε来生成EDB向CAR,从而创建rTCR-CAR.
- 使用人类原发性T细胞和Jurkat细胞研究EDB向T细胞.
- 与传统的CAR T细胞相比,在信号传递,免疫突触形成和T细胞疲劳方面的特征差异.
- 使用异种移植模型评估了体内细胞毒性和体内治疗疗效.
主要成果:
- 在异种移植模型中,与传统的CAR T细胞相比,rTCR-CAR T细胞在体内表现出更高的疗效.
- 观察到瘤血管密度显著降低和瘤生长抑制.
- rTCR-CAR T细胞在与EDB-fibronectin结合时形成了高级免疫突触结构.
- 通过EDB-fibronectin激活导致rTCR-CAR T细胞在体内扩张的增加,基底激活低.
结论:
- 向EDB-纤维素的rTCR-CAR T细胞显示出作为抗癌疗法的显著潜力.
- 这些工程T细胞具有抗血管和细胞毒性活动,绕过抑制的TME.
- 这种单一的治疗剂为持续控制固体瘤提供了潜在的潜力.
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