亲和微调抗CAIX CAR-T细胞减轻了瘤外的目标副作用
Yufei Wang1,2, Alicia Buck1, Brandon Piel3
1Department of Cancer Immunology and Virology, Dana-Farber Cancer Institute, Boston, MA, 02215, USA.
Molecular cancer
|March 16, 2024
概括
一种新的CAR T细胞疗法 (G9) 以微调的亲和力准碳酸酶IX (CAIX),在清细胞细胞癌 (ccRCC) 模型中显著降低了目标外瘤毒性.
科学领域:
- 免疫治疗是一种免疫疗法.
- 在瘤学瘤学.
- 分子生物学分子生物学
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,原因是瘤外 (OTOT) 毒性.
- 这种毒性源于瘤相关抗原 (TAA) 和健康组织之间的共享表位.
- 开发更安全的CAR T细胞策略对于有效的癌症治疗至关重要.
研究的目的:
- 设计和评估一种精细调整的亲和力/贪性CAR T细胞疗法,以减轻OTOT毒性.
- 作为清细胞脏细胞癌 (ccRCC) 的标,研究碳酸 anhydrase IX (CAIX).
- 建立一个更安全的治疗窗口,用于对抗ccRCC的CAR T细胞治疗.
主要方法:
- 使用直接随机光学重建显微镜 (dSTORM) 和流细胞计来评估CAIX表达密度.
- 开发了一种可诱导Tet-On多西环素的CAIX表达细胞系,用于控制抗原仿真.
- 评估了CAR T细胞杀死,迁移和细胞因子释放,使用患者衍生器官型瘤球状体 (PDOTS) 培养物和正位素小鼠模型.
主要成果:
- 鉴定了ccRCC的高CAIX密度和健康胆道组织的低密度.
- 证明了低亲和度/高贪度G9 CAR-T细胞比高亲和度/高贪度G250 CAR-T细胞具有更广泛的治疗窗口.
- 与G250.0相比,G9 CAR-T细胞在PDOTS中表现出更高的疗效,迁移和细胞因子释放,并在体内增强瘤控制.
结论:
- 微调的G9 CAR-T疗法成功地减轻了OTOT对CAIX表达ccRCC的副作用.
- 这种方法使CAIX成为ccRCC的可行和可用药物的免疫治疗点.
- G9 CAR-T疗法在改善CAR T细胞治疗固体瘤的安全性和疗效方面是一个有希望的进步.
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