固体瘤CAR-T细胞用聚变蛋白向PD-L1进行工程设计,用于局部的IL-12输送
John P Murad1,2, Lea Christian2, Reginaldo Rosa1
1Keck School of Medicine (KSOM)/Norris Center for Cancer Cellular Immunotherapy Research (CCCIR), Division of Medical Oncology, Department of Medicine, Keck School of Medicine of USC, Los Angeles, CA, USA.
Nature biomedical engineering
|October 1, 2025
概括
工程化CAR-T细胞分泌αPD-L1-IL-12融合蛋白,增强固体瘤的抗瘤活性和安全性. 这一策略改善了瘤微环境中的T细胞功能,为癌症免疫治疗提供了一种有前途的方法.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 生物技术是生物技术.
背景情况:
- 化学抗原受体 (CAR) -T细胞疗法显示出希望,但由于免疫抑制性瘤微环境 (TME),在固体瘤中面临局限性.
- 需要策略来增强CAR-T细胞在TME中的持久性和功能.
研究的目的:
- 设计CAR-T细胞以分泌双功能融合蛋白质,将细胞因子修饰剂 (TGFβ,IL-15或IL-12) 与免疫检查点抑制剂 (αPD-L1) 结合起来.
- 在前列腺和卵巢癌模型中评估这些工程CAR-T细胞的体外功能,体内安全性和疗效.
主要方法:
- 汽车-T细胞被设计为分泌αPD-L1与TGFβ,IL-15或IL-12的融合蛋白.
- 通过使用前列腺癌和卵巢癌模型进行了体外和体内研究,以评估功能,安全性和有效性.
主要成果:
- 与αPD-L1-IL-12进行工程的CAR-T细胞与对照CAR-T细胞以及与αPD-L1与TGFβ或IL-15融合的CAR-T细胞相比,显示出更高的安全性和有效性.
- αPD-L1-IL-12工程CAR-T细胞改善了T细胞贩运,瘤透和局部IFNγ生产.
- 这种方法调节了TME,增强了抗瘤反应,降低了全身毒性.
结论:
- 工程CAR-T细胞分泌αPD-L1-IL-12融合蛋白是一种可行的策略,以克服TME介导的抑制.
- 这种方法提高了CAR-T细胞的疗效和安全性,为固体瘤癌症免疫治疗带来了潜在的进步.
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