双抑制域iCAR提高了AND-NOT门CART策略的效率
Nathanael J Bangayan1, Liang Wang2, Giselle Burton Sojo2
1Department of Molecular and Medical Pharmacology, University of California, Los Angeles, CA 90095.
概括
化学抗原受体 (CAR) T细胞疗法在固体瘤中面临挑战,原因是瘤外毒性. 这项研究使用双抑制域改善了抑制性CAR (iCAR),提高了固体瘤CAR T细胞疗法的安全性和选择性.
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细胞疗法对血液性恶性瘤有希望,但由于瘤外的瘤毒性,与固体瘤作斗争.
- 具有AND-NOT逻辑门的抑制性CARs (iCARs) 旨在通过抑制在表达抗原的正常组织部位的CAR T细胞活性来减轻这种情况.
- 目前的iCAR策略往往是低效的,需要高抗原水平和iCAR表达才能有效抑制.
研究的目的:
- 调查TROP2向的iCAR与PD1抑制域对抗CEACAM5向CAR (CEACAR) 的无效性.
- 通过修改激情,亲和力和细胞内信号域来提高iCAR的效率.
- 开发改进的AND-NOT门策略,以在固体瘤中提供更安全,更有选择性的CAR T细胞疗法.
主要方法:
- 修改iCAR狂热度,亲和力和细胞内信号域,以解决抑制中的动力延迟.
- 选了12个不同的抑制信号域,以增强iCAR功能.
- 通过将抑制域 (例如,LAIR-1,SIGLEC-9与PD-1) 与CEACAR结合起来,构建和测试双抑制域iCARs (DiCARs).
主要成果:
- 增加iCAR狂热度,但不是亲和力,显著降低了细胞毒性抑制的动力延迟.
- 特定的抑制域 (BTLA,LAIR-1,SIGLEC-9) 抑制了CAR T功能,但单独的抑制动力学并没有改善.
- 结合LAIR-1或SIGLEC-9与PD-1的双抑制域iCARs (DiCARs) 证明了抑制效率的提高和延迟的减少.
结论:
- 单域iCARs的低效率归因于抑制信号的动力延迟.
- 优化iCAR狂热度和利用双抑制域可以显著提高抑制效率.
- 实现CAR和iCAR信号强度和动力学之间的平衡对于调节固体瘤中AND-NOT门CAR T细胞选择性至关重要.
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